bims-polgdi Biomed News
on POLG disease
Issue of 2026–01–25
38 papers selected by
Luca Bolliger, lxBio



  1. Am J Physiol Heart Circ Physiol. 2026 Jan 22.
      Mitochondrial DNA (mtDNA) has emerged as a key signaling molecule, extending beyond its primary role in supporting energy production. Its replication, release, and degradation are tightly regulated, and their dysregulation can activate immune pathways, including TLR9, cGAS-STING, and inflammasomes. In this review, we summarize recent advances in understanding mtDNA biology, including mechanisms of replication and release, recognition by pattern recognition receptors, and its impact on disease. We highlight evidence linking mtDNA to cardiovascular disease, as well as the aging-related chronic kidney disease, lung disorders, and neurodegeneration, and discuss the utility of circulating mtDNA copy number as a biomarker. Finally, we outline therapeutic strategies to reduce mtDNA release, block its sensing, and enhance clearance via autophagy/mitophagy. These findings underscore mtDNA as both a driver of pathology and a promising target for diagnosis and therapy across multiple organ systems.
    Keywords:  aging; cardiovacular diseases; inflammation; mitochondrial DNA
    DOI:  https://doi.org/10.1152/ajpheart.00686.2025
  2. Adv Sci (Weinh). 2026 Jan 22. e23368
      Mitochondria are essential organelles responsible for cellular energy production and diverse metabolic processes. Mitochondrial dysfunction is implicated in a wide range of diseases. Specifically, genetic mitochondrial diseases, arising from mutations in mitochondrial or nuclear DNA, lead to significant mitochondrial deficits, which result in debilitating and often life-threatening symptoms. Conventional treatments frequently fail to address these underlying mitochondrial defects, leaving few therapeutic options. Mitochondrial transplantation (MTx), an emerging therapeutic approach involving the delivery of healthy exogenous mitochondria to target cells, has demonstrated beneficial effects in various mitochondria-mediated diseases in both preclinical and early clinical studies. However, its application to inherited mitochondrial disorders remains largely unexplored and raises important questions about the need for repeated or continuous administration to sustain therapeutic effects. This review systematically examines the potential of MTx for inherited mitochondrial disorders by classifying these diseases by mitochondrial and nuclear DNA origin, critically assessing MTx evidence and mechanisms, and identifying unique translational requirements for chronic inherited disorders. While significant challenges remain, MTx represents a promising approach to directly address mitochondrial dysfunction in these life-threatening conditions with limited therapeutic alternatives.
    Keywords:  chronic diseases; genetic diseases; mitochondrial transplantation; therapeutics
    DOI:  https://doi.org/10.1002/advs.202523368
  3. JCI Insight. 2026 Jan 23. pii: e181812. [Epub ahead of print]11(2):
      Mitochondria-derived acyl-coenzyme A (acyl-CoA) species chemically modify proteins, causing damage when acylation reactions are not adequately detoxified by enzymatic removal or protein turnover. Defects in genes encoding the mitochondrial respiratory complex and TCA cycle enzymes have been shown to increase acyl-CoA levels due to reduced enzymatic flux and result in proteome-wide hyperacylation. How pathologically elevated acyl-CoA levels contribute to bioenergetics failure in mitochondrial diseases is not well understood. Here, we demonstrate that bulk succinylation from succinyl-CoA excess consumes the enzymatic cofactor NAD+ and propagates mitochondrial respiratory defects in a zebrafish model of succinyl-CoA ligase deficiency, a childhood-onset encephalomyopathy. To explore this mechanism as a therapeutic target, we developed a workflow to monitor behavioral defects in sucla2-/- zebrafish and show that hypersuccinylation is associated with reduced locomotor behavior and impaired ability to execute food hunting patterns. Postembryonic NAD+ precursor supplementation restores NAD+ levels and improves locomotion and survival of sucla2-/- zebrafish. Mechanistically, nicotinamide and nicotinamide riboside require the NAD+-dependent desuccinylase Sirt5 to enhance oxidative metabolism and nitrogen elimination through the urea cycle. Collectively, NAD+ supplementation activates Sirt5 to protect against damage to mitochondria and locomotor circuits caused by protein succinylation.
    Keywords:  Cell biology; Genetic diseases; Metabolism; Mitochondria
    DOI:  https://doi.org/10.1172/jci.insight.181812
  4. Aging Adv. 2025 Dec 18.
      Mitochondrial function is crucial in regulating cellular activity and determining cell fate. The replication and transcription of mitochondrial DNA are essential for maintaining mitochondrial integrity. These processes are governed by mitochondrial fission and fusion, which play a vital role in energy distribution, quality control, and metabolic regulation. Mitochondrial fission relies on the coordinated actions of mitochondria-endoplasmic reticulum contact sites, actin filaments, and dynamin-related protein 1, which collectively mediate mitochondrial constriction and fission. This interplay is fundamental to mitochondrial homeostasis and, critically, to the functionality of skeletal muscle. In this review, we explore the complex interactions among dynamin-related protein 1, mitochondria-endoplasmic reticulum contact sites, and actin and their significance for skeletal muscle function. Additionally, we discuss potential strategies to preserve these interactions, supporting optimal muscle performance in skeletal muscle aging. This review provides key insights and outlines future research directions to advance our understanding of this essential yet widely studied relationship.
    Keywords:  dynamin-related protein 1 (DRP1); exercise interventions; fission and fusion; mitochondria quality control; mitochondrial dynamics; mitochondria–endoplasmic reticulum contact sites (MERCs); mitophagy; posttranslational modifications; sarcopenia; skeletal muscle aging
    DOI:  https://doi.org/10.4103/agingadv.agingadv-d-25-00013
  5. Am J Physiol Lung Cell Mol Physiol. 2026 Jan 22.
      As bioactive microproteins, Mitochondrial-Derived-MicroProteins (MDPs) are encoded within the small open reading frames (sORFs) of mitochondrial DNA. MDPs have been shown to be altered in a number of disease states and have mitochondrial, nuclear and extracellular actions. Most published work on MDP's has focused on MOTS-c and Humanin's actions in tissues with high mitochondrial density (heart, skeletal muscle, and brain) or in disease states of advanced age - Alzheimer's, Cancer, Cardiovascular disease. This review aims to highlight the existing gaps in knowledge related to MDPs' role in lung homeostasis and disease - including Acute Lung Injury (ALI), Chronic Obstructive Pulmonary Disease (COPD), allergic asthma (AA) and Pulmonary Fibrosis (PF). The increasingly recognized role of MDPs in non-pulmonary diseases sheds light on the importance of more investigations of MDPs, their clinical and mechanistic roles, and their therapeutic potential for pulmonary diseases.
    Keywords:  COPD; acute lung injury; microproteins; mitochondria; pulmonary fibrosis
    DOI:  https://doi.org/10.1152/ajplung.00369.2025
  6. Psychiatry Clin Neurosci. 2026 Jan 19.
      Bipolar disorder is a psychiatric disorder marked by recurrent mood episodes and a strong genetic component. Despite widespread use of mood stabilizers and atypical antipsychotics, effective treatments remain limited, highlighting the need for mechanistic insights. Early studies revealed decreased phosphocreatine and increased mitochondrial DNA (mtDNA) deletions in the brains of bipolar disorder patients, leading to the mitochondrial dysfunction hypothesis. This framework proposes that mtDNA mutations impair Ca2+ buffering, producing neuronal dysfunction and mood instability. Supporting evidence spans neuroimaging, postmortem, genetic, and cellular studies, as well as therapeutic responses to mitochondrial modulators. Large-scale genomic analyses implicate both rare and common variants affecting Ca2+ signaling and mitochondrial-endoplasmic reticulum function, while somatic mtDNA mutations further link mitochondrial pathology to bipolar disorder. Animal and induced pluripotent stem cell models converge on neuronal hyperexcitability as a downstream effect of impaired Ca2+ regulation. Recent work highlights the paraventricular thalamic nucleus (PVT) as a critical site of pathology. The PVT integrates serotonergic and limbic circuits, regulates salience, and exhibits the highest burden of mtDNA deletions in mutant Polg (mtDNA polymerase) mice. In humans, single-nucleus RNA sequencing reveals a ~50% reduction of PVT neurons in bipolar disorder, with marked transcriptional dysregulation enriched for bipolar disorder risk loci in PVT, with additional changes in microglia. Neuropathological studies further suggest neurodegenerative changes in PVT, particularly in late-onset bipolar disorder. Collectively, these findings position PVT pathology at the core of bipolar disorder pathophysiology, offering a framework that integrates genetic risk, neuronal hyperexcitability, and circuit-level dysregulation and guiding future therapeutic strategies.
    Keywords:  bipolar disorder; intracellular calcium signaling; microglia; paraventricular nucleus of the thalamus; serotonin
    DOI:  https://doi.org/10.1111/pcn.70015
  7. Redox Biol. 2026 Jan 14. pii: S2213-2317(26)00030-3. [Epub ahead of print]90 104032
      Dendritic Cells are central players of our immune system, linking innate sensing to adaptive immunity through antigen presentation and T cell priming. Beyond transcriptional and cytokine-based regulation, mitochondria are emerging as potential regulators of Dendritic Cell biology. While still in its infancy, evidence is accumulating that mitochondrial pathways affect Dendritic Cell differentiation; that mitochondrial remodeling and bioenergetic rewiring underpin Dendritic Cell maturation and activation in response to pathogenic and inflammatory stimuli and that shifts in mitochondrial and redox dynamics, reactive oxygen species production and mitochondrial DNA release coincide with Dendritic Cell activation and co-stimulatory molecule expression. Mitochondria are furthermore involved in regulating Dendritic Cell migration by influencing cellular metabolism and cytoskeletal dynamics and support the antigen processing and presentation machinery, thereby dictating the quality of the initiated T cell response. Importantly, mitochondrial checkpoints also regulate Dendritic Cell survival, balancing immune activation with timely cell death to preserve immune homeostasis. While the exact pathways of mitochondrial regulation are just beginning to be understood, disruptions in these programs can be far reaching. During aging, progressive mitochondrial dysfunction has been associated with impaired Dendritic Cell differentiation, diminished antigen presentation and impaired T cell responses. Similar defects have been observed in chronic diseases and cancer, leading us to hypothesize that genetic disorders linked to mitochondrial dysfunction also lead to defects in Dendritic Cell biology, impacting clinical symptoms such as immune dysregulation, heightened infection risk and inappropriate chronic inflammation. Therefore, in this review we have summarized the emerging roles of mitochondrial regulation in Dendritic Cell biology and discuss therapeutic opportunities to restore immune competence by targeting mitochondrial and redox pathways in settings of Dendritic Cell dysfunction. These insights aim to encourage further research into these topics and propose targeted metabolic reprogramming as a new therapeutic strategy for healthy ageing and chronic disease management.
    Keywords:  Dendritic cell; Mitochondria; Mitochondrial diseases; Mitochondrial dynamics; Redox biology
    DOI:  https://doi.org/10.1016/j.redox.2026.104032
  8. Nucleic Acids Res. 2026 Jan 14. pii: gkag008. [Epub ahead of print]54(2):
      Twinkle is the sole replicative helicase in human mitochondria, essential for mitochondrial DNA replication. Beyond its canonical unwinding activity, Twinkle has non-canonical activities, including DNA annealing and strand-exchange. Here, we show that these non-canonical activities extend to RNA. Twinkle binds RNA and catalyzes RNA:DNA hybrid formation through annealing, strand-exchange, and toehold-mediated strand displacement. Twinkle can unwind RNA:DNA forks when loaded onto the DNA tail but not the RNA tail. Although the physiological role of these RNA-related activities remains unclear, we show that Twinkle can strand-exchange an RNA downstream of a stalled replication fork to restart replication. The annealing/strand-exchange activity can be involved in DNA replication initiation and repair, but RNA:DNA hybrids can compromise genome integrity, emphasizing the need to balance unwinding and annealing activities. Interestingly, mitochondrial SSB inhibits the RNA:DNA annealing activity of Twinkle, thus regulating the non-canonical functions of Twinkle. A disease-associated W315L variant, which is defective in DNA replication, retains annealing and strand-exchange functions with both RNA and DNA, resulting in an imbalance between replication and annealing functions that may underlie its pathogenicity. Our findings of Twinkle's RNA-binding and strand-exchange activities may have a connection to its localization within mitochondrial RNA granules.
    DOI:  https://doi.org/10.1093/nar/gkag008
  9. Mol Neurobiol. 2026 Jan 23. 63(1): 392
      Autism spectrum disorder (ASD) is a multifactorial, neuro-psychiatric, and neurodevelopmental illness possessing impaired social, behavioral, and communicative presentations. Research suggested the important role of the gut-brain axis in ASD, especially related to gut dysbiosis and mitochondrial dysfunction. This review comprehensively summarizes the existing evidence of the association between gut microbiota, microbial metabolites, and mitochondrial dysfunction in ASD, comprising of clinical, experimental, and epidemiological data over the last decade. The focus was on the research that clarifies the gut-mitochondria crosstalk and role in ASD pathophysiology. ASD patients demonstrate a substantial shift in the variety of gut microbiota, such as a decrease in the number of beneficial microbes and the growth of pathogenic taxa. These changes affect the biosynthesis of major neuroactive metabolites executing immune modulation and neurotransmission. The review detects the microbial metabolites that regulate mitochondrial activity through mechanisms like vagus nerve, intestinal hormones, and immune signaling. The different mitochondrial signaling pathways were inhibited including AMPK, mTOR, and NF-κB. Preventive interventions that concentrate on modulation of the microbiome and mitochondria may present a prospective line of therapy. Nevertheless, uncovered gaps should be mentioned in future research, multi-omics studies, longitudinal studies, and the protocol to understand the components of gut-brain axis in ASD to develop personalized therapy.
    Keywords:  Autism spectrum disorder; Gut microbiome; Gut-brain axis; Mitochondrial pathways
    DOI:  https://doi.org/10.1007/s12035-026-05702-5
  10. Orphanet J Rare Dis. 2026 Jan 20.
      
    Keywords:  Location-based sampling; Medical research; Online-based sampling; Patient recruitment; Rare diseases; Respondent-driven sampling; Sampling strategy; Vulnerable populations
    DOI:  https://doi.org/10.1186/s13023-025-04192-3
  11. Adv Sci (Weinh). 2026 Jan 21. e18084
      Lineage tracing at single-cell resolution is vital for mapping cell fate decisions, yet synthetic barcoding faces limitations in precision, diversity, and toxicity-especially in human pluripotent stem cells (hPSCs). Here, we repurpose naturally occurring somatic mutations in mitochondrial transcripts from single-cell RNA sequencing as endogenous genetic barcodes. By enriching mitochondrial reads and applying a robust computational pipeline, we identified clonally informative variants to trace hematopoietic lineage emergence from hPSCs during early embryogenesis. Integrating mitochondrial barcoding with synthetic lineage tracing, we modeled embryonic tissue development and reconstructed the transcriptional logic and regulatory networks driving fate specification using a dynamical systems model. Extending this approach to spatial transcriptomics, we mapped the clonal architecture of human embryonic organoids, revealing spatial zonation orchestrated by NOTCH-mediated crosstalk between stromal cells and hematopoietic progenitors. This multimodal strategy links clonal dynamics with niche-driven fate decisions, offering a scalable, non-invasive method to dissect tissue organization in development and disease. Together, our work establishes a scalable, non-invasive multimodal framework that leverages endogenous mitochondrial DNA variants to reconstruct high-resolution spatiotemporal clonal dynamics and decode niche-driven fate decisions in a human stem cell-derived model. This approach provides a powerful strategy for dissecting tissue self-organization in development and disease.
    Keywords:  cell fate decisions; hematopoietic organoids; mitochondrial DNA variant; single‐cell lineage tracing; spatial transcriptomics
    DOI:  https://doi.org/10.1002/advs.202518084
  12. Autophagy. 2026 Feb;22(2): 235-237
      A recent study published in Nature by Zhang et al. reported that cytosolic acetyl-CoA functions as a signaling metabolite that regulates NLRX1-dependent mitophagy during nutrient stress. This discovery reveals a metabolic checkpoint for mitochondrial quality control and provides new insights into KRAS inhibitor resistance.
    Keywords:  Acetyl-CoA; KRAS inhibitor; NLRX1; metabolic signaling; mitophagy
    DOI:  https://doi.org/10.1080/15548627.2025.2593032
  13. Adv Sci (Weinh). 2026 Jan 20. e20383
      Inflammatory disorders are characterized by immune-mediated inflammatory cascades that can affect multiple organs. Cell-free DNA (cfDNA) is not only a biomarker for various inflammatory diseases, but also a driver in innate immune responses, offering emerging diagnostic and therapeutic possibilities for inflammatory diseases. This review begins by examining immune signatures in inflammation, with particular focus on the vicious cycle between cfDNA and inflammatory responses. We then discuss cfDNA detection strategies and their clinical applications as disease biomarkers. Crucially, we highlight design principles and formulation strategies for cfDNA-based interventions for inflammation regulation, considering physical, biochemical, and immunological properties of cfDNA. These approaches encompass advanced nanotechnologies such as drug loading, targeted delivery, inflammation-responsive release, and microenvironment reprogramming. Subsequently, we examine cfDNA intervention strategies for precision treatment of inflammatory diseases, including inflammatory bowel diseases, rheumatoid arthritis, sepsis, periodontitis, and psoriasis. Finally, we present key insights and future perspectives, as well as discuss translational challenges and clinical considerations, thereby paving the way for innovative approaches to inflammation modulation and disease management.
    Keywords:  cGAS‐STING pathway; cell‐free DNA; inflammation; inflammatory disorders; toll‐like receptors
    DOI:  https://doi.org/10.1002/advs.202520383
  14. Biol Lett. 2026 Jan 21. pii: 20250620. [Epub ahead of print]22(1):
      Mitochondrial plasticity enables ectothermic animals to maintain performance under changing thermal conditions, but whether this ability declines through adulthood is unknown. We explored changes in mitochondrial plasticity in the three-spined stickleback (Gasterosteus aculeatus), a temperate fish that in many populations has a single breeding season over which it produces multiple clutches and then dies. Wild-caught fish were exposed to one of three thermal regimes: remaining at 12°C, switching to constant warm (21°C) or diel cycling (12-21°C) for three weeks at either the beginning or end of the season. We quantified both phosphorylating and non-ATP-producing (OXPHOS and LEAK) respiration in isolated muscle mitochondria and oxidative control efficiency (OxCE). Early in the breeding season, young fish responded to elevated temperatures by adjusting both their capacity for ATP production and non-ATP-production respiration, but this mitochondrial plasticity declined over the season. OxCE was unaffected by time of season or temperature treatment. Changing body condition was unrelated to mitochondrial function. Our findings indicate that mitochondrial plasticity declines across adult life, potentially limiting thermal resilience in older individuals, the first time this has been reported in an ectotherm. This highlights the need to account for age-related physiological changes in capacity when predicting species' responses to environmental change.
    Keywords:   Gasterosteus aculeatus ; acclimation; ageing; thermal tolerance
    DOI:  https://doi.org/10.1098/rsbl.2025.0620
  15. Front Synaptic Neurosci. 2025 ;17 1676317
      Alzheimer's disease is a progressive neurodegenerative disorder marked by cognitive decline, accumulation of amyloid-β plaques and neurofibrillary tangles, synaptic dysfunction, and mitochondrial impairment. Despite multiple therapeutic strategies, currently available treatments only provide symptomatic relief without halting disease progression. Emerging evidence implicates mitochondrial dysfunction-including oxidative stress, impaired calcium signaling, mitophagy deficits, disrupted proteostasis, and electron transport chain abnormalities, as central to AD pathogenesis. These dysfunctions contribute to synaptic degeneration, increased reactive oxygen species, and neuronal death. This review consolidates current knowledge on the mechanistic pathways of mitochondrial impairment in AD and their downstream effects on neuronal health. We also explore the therapeutic potential of multitarget approaches, including agents targeting Aβ and tau pathology, oxidative stress mitigation, mitochondrial quality control, and synaptic restoration. By integrating evidence from recent preclinical and clinical studies, this work highlights mitochondrial homeostasis as a promising frontier for disease-modifying therapies in AD.
    Keywords:  Alzheimer’s disease; aging; bioenergetics; mitochondrial free radical production and longevity; synaptic plasticity
    DOI:  https://doi.org/10.3389/fnsyn.2025.1676317
  16. bioRxiv. 2026 Jan 14. pii: 2025.11.24.689096. [Epub ahead of print]
      The interdependent relationship between mitochondrial and nuclear genomes is a powerful model for understanding how epistasis shapes the architecture and evolution of complex traits. Once considered a neutral marker, mitochondrial DNA variation is now recognized as critical to phenotypic evolution because of its epistatic interactions and history of coevolution with the nuclear genome. A central challenge in evolutionary genetics is to quantify the relative importance of stabilizing and directional selection shaping complex trait distributions within and among species. Both can act on interacting and/or co-evolving genes contributing to quantitative traits, but resolving their relative roles is complicated by the complex architecture of most traits. Here, we use a panel of 90 Drosophila mitonuclear genotypes to quantify the relative contributions of mitochondrial, nuclear, and environmental variation and their interactions to four metabolically demanding complex traits. We sample both within-species and between-species mitochondrial variation and observe stronger interaction effects attributable to within-species variation, consistent with stabilizing selection maintaining mitonuclear function. Additionally, culturing the flies on a mitochondrial Complex I inhibitor, rotenone, reveals significant genotype x environment (GxE and GxGxE) interaction effects, providing insight into how genetic variation can be maintained across changing environments. Our results have broader implications in medicine, where mitochondrial DNA donors with longer purifying selection histories may be safer for mitochondrial replacement therapies.
    DOI:  https://doi.org/10.1101/2025.11.24.689096
  17. Eur Cytokine Netw. 2026 Jan 19. 36(3): 0
      Immunotherapy has demonstrated limited efficacy in immunologically "cold" breast cancers characterized by absent T-cell infiltration and inadequate interferon signaling. The purpose of this work is to propose and articulate a mechanistic and therapeutic framework in which mitochondrial stress is deliberately harnessed to convert immunologically "cold" breast tumors into "hot," T cell-inflamed, immunotherapy-responsive lesions. This review synthesizes emerging evidence positioning mitochondrial stress as a strategic lever to transform these immune-excluded tumors into inflamed, therapy-responsive lesions. We examine how mitochondrial dysfunction triggers cytosolic release of mitochondrial DNA (mtDNA), a potent damage-associated molecular pattern that activates the cGAS-STING pathway, initiating type I interferon responses and secretion of T-cell-recruiting chemokines such as CCL5 and CXCL10. This axis functions as a "double-edged sword"-while acute activation converts "cold" tumors into "hot" immune-responsive states, chronic engagement drives immunosuppressive cytokine networks and therapeutic resistance, with outcomes varying across breast cancer subtypes. We explore six combination therapeutic strategies: mitochondrial poisons, radiotherapy/chemotherapy, PARP/ATR inhibitors, metabolic reprogramming agents, mitochondrial quality control modulators, and localized mitochondrial stress induction, each paired with immune checkpoint blockade. The review emphasizes "controlled ignition" as a paradigm whereby precisely dosed mitochondrial stress amplifies tumor antigenicity and favorable cytokine landscapes while avoiding chronic immunosuppression. Cytokine networks emerge as both integrators and therapeutic targets of mitochondrial-immune crosstalk. Future advances require mapping subtype-specific thresholds, developing tumor-restricted delivery systems, and implementing biomarker-guided trials to safely harness mitochondrial stress, potentially redefining these organelles as programmable immunological adjuvants in breast cancer therapy.
    Keywords:  breast cancer; cgas; cytokines; immunotherapy; mitochondrial stress; sting; tumor microenvironment
    DOI:  https://doi.org/10.1684/ecn.2025.0504
  18. NeuroSci. 2026 Jan 06. pii: 7. [Epub ahead of print]7(1):
      Neurodegenerative diseases such as Alzheimer's, Parkinson's, amyotrophic lateral sclerosis, and Huntington's disease represent a major challenge in neuroscience due to their complex, multifactorial nature and the absence of curative treatments. These disorders share common molecular mechanisms, including oxidative stress, mitochondrial dysfunction, proteostasis collapse, calcium dyshomeostasis, chronic neuroinflammation, and the prion-like propagation of misfolded proteins. Together, these processes trigger a cascade of cellular damage that culminates in synaptic dysfunction and programmed neuronal death. This review integrates current evidence on the sequential stages of neurodegeneration, emphasizing the convergence of oxidative, inflammatory, and proteotoxic pathways that drive neuronal vulnerability. Moreover, it explores emerging therapeutic strategies aimed at restoring cellular homeostasis, such as Nrf2 activation, modulation of the unfolded protein response (UPR), enhancement of autophagy, immunotherapy against pathological proteins, and gene therapy approaches. The dynamic interplay among mitochondria, endoplasmic reticulum, and glial cells is highlighted as a central element in disease progression. Understanding these interconnected mechanisms provides a foundation for developing multi-targeted interventions capable of halting or delaying neuronal loss and improving clinical outcomes in neurodegenerative disorders. This work provides an integrative and introductory overview of the convergent mechanisms underlying neurodegeneration rather than an exhaustive mechanistic analysis.
    Keywords:  neurodegeneration; neuroinflammation; oxidative stress; proteostasis; therapeutic strategies
    DOI:  https://doi.org/10.3390/neurosci7010007
  19. iScience. 2026 Feb 20. 29(2): 114511
      Colorectal cancer (CRC) therapy is challenged by drug resistance and limited treatment efficacy. Mounting evidence now positions mitochondrial dysfunction as a central mediator of these challenges, making it a compelling therapeutic target. This review synthesizes findings demonstrating that targeting mitochondrial metabolism, apoptosis, dynamics, mitophagy, and intercellular transfer effectively overcomes chemoresistance and restores treatment sensitivity in CRC models. Key mechanisms include the reversal of the Warburg effect, reactivation of intrinsic apoptosis, and disruption of mitochondrial transfer. Clinically, mitochondrial-derived biomarkers, such as cell-free mtDNA, emerge as promising tools for non-invasive monitoring and prognosis. Furthermore, advancements in targeted delivery systems and supportive interventions such as exercise, are shown to enhance therapeutic efficacy and mitigate toxicity. We conclude that integrating mitochondrial-targeted strategies represents a transformative approach for CRC treatment, with future success hinging on overcoming delivery challenges and validating these strategies in personalized models.
    Keywords:  Biochemistry; Cancer; Immunology
    DOI:  https://doi.org/10.1016/j.isci.2025.114511
  20. Seizure. 2026 Jan 07. pii: S1059-1311(26)00011-7. [Epub ahead of print]135 28-33
       BACKGROUND: Progressive myoclonic epilepsies (PMEs) are severe epileptic encephalopathies characterized by drug-resistant seizures, myoclonus, neuroregression, and ataxia. Biallelic variants in KCTD7 cause a rare autosomal recessive PME (MIM #611726).
    METHODS: We retrospectively analysed six unrelated children with genetically confirmed KCTD7-related PME diagnosed at a quaternary referral centre in South India (2018-2025). Clinical features, EEG, SSEP, MRI, and genetic results were reviewed. Variant pathogenicity was assessed per ACMG guidelines.
    RESULTS: Six patients (3 male, 3 female; median onset 11 months, range 6-18 months) were included. Initial symptoms were seizures (four patients) or developmental delay (two patients), with regression in five patients. Fever-triggered worsening was noted in all patients. Ataxia was a common symptom (five patients). EEG showed generalized or multifocal epileptiform discharges, often posterior-predominant. MRI demonstrated diffuse cerebral/cerebellar atrophy and characteristic thalamic T2 hypo-intensity in three patients. Genetic analysis identified seven variants: five missense and two frame-shift, including three novel variants (p.Arg279Cys, p.Asp115Profs88, and p.Cys71fs*130). The recurrent p.Ala178Val variant was observed in two patients. One patient had epilepsia partialis continua responsive to corticosteroids.
    CONCLUSIONS: This series expands the phenotypic and genotypic spectrum of KCTD7-related PME in India. Key clinical clues include developmental regression, seizures, cortical myoclonus, fever-provoked worsening, posterior-dominant epileptiform discharges, and early ataxia. The study highlights the importance of comprehensive genetic testing for accurate diagnosis, prognostication, and counselling in early-onset epileptic encephalopathies.
    Keywords:  Genetic epilepsy; KCTD7; Neuronal ceroid lipofuscinosis (CLN14); Neuroregression; Progressive myoclonic epilepsy
    DOI:  https://doi.org/10.1016/j.seizure.2026.01.005
  21. Metabolomics. 2026 Jan 19. 22(1): 17
       BACKGROUND: Renal involvement is a recognized feature of primary mitochondrial disorders (PMD), either at presentation or during the disease course. Simultaneously, the metabolomic fingerprint of chronic kidney disease (CKD) is often associated with underlying mitochondrial dysfunction. This study aimed to characterize urinary metabolic signatures in genetically confirmed paediatric PMD without chronic kidney disease, comparing them to healthy controls, suspected (unconfirmed) mitochondrial disease (SMD), and non-mitochondrial CKD.
    METHODS: We performed untargeted 1H NMR metabolomic profiling of 76 urine samples from 51 paediatric patients and 10 healthy controls. PMD patients in acute decompensation or known CKD and statistical outlier samples were excluded. Final comparisons included genetically confirmed PMD without CKD (n = 13), SMD (n = 10), non-mitochondrial CKD (n = 28; 17 at stages 1-2 and 9 at stages 3-5), and healthy controls (n = 10). Spectral data were analyzed using multivariate statistical approaches-including principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA)-as well as univariate methods with Mann-Whitney U for pairwise group metabolite comparison.
    RESULTS: Urinary metabolic profiles of PMD patients differed from healthy controls and CKD patients. Multivariate analysis revealed a strong discriminative ability between PMD and controls (Q² = 0.53) and advanced CKD (Q2 = 0.78). Compared to controls, PMD patients had increased levels of Krebs cycle intermediates (cis-aconitate, fumarate and succinate), creatine, tryptophan, homovanillate (HVA) and hypoxanthine, as well as decreased histidine. All, except fumarate and histidine, remained discriminative when comparing PMD to CKD. CKD patients showed a diverging metabolomic fingerprint with 1-methylnicotinamide (MNA) and 2-hydroxyisobutyrate emerging as potential CKD-specific biomarkers, effectively discriminating between CKD stage 3-5 from earlier stages and controls. A five-metabolite panel comprising cis-aconitate, fumarate, HVA, tryptophan and histidine achieved high diagnostic performance for identifying PMD, with an area under the curve (AUC) of 0.836 (PMD vs. controls) and AUC = 0.783 across all groups. This biosignature integrates metabolites involved in distinct functional domains including energy metabolism, neurotransmitter turnover and amino acid metabolism and renal handling.
    CONCLUSION: Urinary metabolomic profiling by NMR revealed a distinct biosignature in pediatric PMD patients without renal involvement, characterized by elevated levels of tryptophan, HVA, and Krebs cycle intermediates, and diminished histidine. The divergent changes in tryptophan, histidine and HVA, suggest a mitochondria-specific metabolic phenotype in PMD. These findings support the use of urinary NMR metabolomics as a non-invasive tool for biomarker discovery in PMD and highlight the potential of integrated, multiparametric metabolic fingerprints for diagnostic refinement and patient stratification.
    Keywords:  Biomarkers; Metabolomics; NMR; Pediatric CKD; Primary mitochondrial disorders; Urine
    DOI:  https://doi.org/10.1007/s11306-025-02363-8
  22. J Microbiol Biotechnol. 2026 Jan 18. 36 e2511046
      Recent advances in microbiome research have highlighted that age-related physiological changes are closely shaped by shifts in the gut microbial community rather than by the passage of time alone. Aging is frequently accompanied by a decline in microbial diversity and the loss of short-chain fatty acid-producing taxa, changes that weaken the intestinal barrier and contribute to the persistent low-grade inflammation described as inflammaging. These alterations intersect with immune and metabolic pathways linked to immunosenescence, cellular senescence, and mitochondrial function. In contrast, microbial ecosystems enriched with butyrate-producing and polyamine-generating species have been associated with more stable epithelial integrity, improved metabolic flexibility, and balanced immune activity. Emerging findings also indicate that the gut microbiota communicates with peripheral organs through the gut-skin, gut-muscle, and gut-brain axes, influencing tissue-specific aging processes. Evidence from animal models and human studies shows that dietary modulation, probiotics, and other microbiota-directed approaches can partially restore microbial functions relevant to aging, although responses vary considerably across individuals. Interest is also growing in postbiotic strategies, including microbial metabolites and vesicle-based components, which may offer targeted effects without requiring colonization. By integrating these mechanistic and translational insights, this review outlines how the gut microbiota contributes to aging biology and discusses the potential for microbiome-based interventions to support healthspan.
    Keywords:  Aging; Cellular senescence; Gut microbiota; Healthy aging; Inflammaging; Probiotics
    DOI:  https://doi.org/10.4014/jmb.2511.11046
  23. Front Genet. 2025 ;16 1713598
       Introduction: Trust is built on the belief that promises will be honored. In biodata research, public trust is established when researchers conduct studies as promised and utilize the research outcomes in accordance with the stated objectives. Participants, particularly those contributing sensitive data, often demand a detailed explanation regarding how their data will be utilized and governed, which forms the foundation of trust. The National Project of Bio-Big Data (NPBBD) was conceived upon this premise. Within this framework, participants recognize the necessity of biobanks, the state ensures trustworthy governance through institutional safeguards, and researchers uphold these commitments-thereby sustaining a cycle of trust. Although prior studies have examined public attitudes toward biobanks and general willingness to participate, less is known about their perspectives on consent models, governance structures, benefit-sharing mechanisms, and motivations for engagement. Persistently low participation rates highlight the need for systematic analysis of underlying barriers and strategies to strengthen public involvement. Considering the NPBBD's goal of building a nationwide cohort of one million individuals, this study seeks to identify the motivating factors that can foster improved public participation. By assessing public awareness and participation drivers, we aim to delineate the conditions of trust from the participants' perspectives and offer guidance for data-driven policies grounded in medical, ethical, legal, and social legitimacy.
    Methods: Between August 22-30, 2024, a web- and mobile-based survey was conducted among 1,027 adults aged 19-64 years, residing across 17 provinces and metropolitan cities in Korea, selected via proportional allocation. The questionnaire, developed with reference to prior studies including ethical, legal, and social implications, comprised 19 items across six domains, and 16 sociodemographic questions.
    Results: Overall, 15.1% of the respondents were aware of the NPBBD, and 35.1% had heard of it, as compared to 49.1% who recognized the term "biobank." Willingness to participate varied by incentive: 60.9% expressed willingness to participate when personal benefits were offered, 29.9% were motivated by public interest, and 9.3% declined participation altogether. Among the non-participants, 18.9% agreed to participate when presented with a rare disease scenario. Anticipated benefits included early detection and prevention (mean score: 78.3), treatment for rare or incurable diseases (76.5), and advancement of research (75.4). Key concerns centered on data breach (77.0), third-party misuse (76.1), and unconsented data use (75.6). Participation drivers included contribution to science (74.6), support for future generations (72.5), and personal benefits (68.1), with access to professional consultation (78.6) emerging as the most influential factor. The most desired information was genetic risk prediction (62.8%). Respondents favored receiving updates on sanctions for misuse (82.0%), supervisors assigned to monitor data use (80.3%), and ongoing research use (75.0%), through text messages (41.0%) and email (36.1%). Regarding additional data, 39.6% were willing to share information about their health, lifestyle, and habits; 38.0% preferred to share health information only; and 13.2% were ready to give biospecimens only. While the majority of participants favored reinvesting profits into drug and treatment development, others preferred receiving benefits through partial coverage of treatment costs (64.1%). In terms of governance, most respondents preferred a shared model involving government, public, and private institutions (44.7%). Consent preferences leaned toward dynamic (57.8%) over broad consent (35.2%).
    Discussion: Public perception of biodata collection reflected a mix of anticipated personal and public benefits, alongside concerns regarding data disclosure. Willingness to participate was influenced more by personal benefits (60.9%) than by public interest (29.9%). While personal incentives such as treatment cost coverage were valued, participation was also driven by a desire to contribute to research and support drug development, reflecting a blend of self-interest and altruistic motivation. Concerns centered on data leakage, with dynamic consent emerging as a key condition of trust, alongside public governance and the right to information. To secure public trust and increase participation in the NPBBD, tailored strategies must be used to balance personal and public benefits with transparent governance, information provision, and consent procedures.
    Keywords:  ELSI; NPBBD; bio-big data; biobank; public engagement; survey
    DOI:  https://doi.org/10.3389/fgene.2025.1713598
  24. Adv Drug Deliv Rev. 2026 Jan 15. pii: S0169-409X(26)00012-8. [Epub ahead of print] 115778
      Oligonucleotide therapeutics, including antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs), have gained increasing attention as a novel modality for gene-targeted interventions for central nervous system (CNS) disorders, particularly in the context of rare and inherited neurological conditions. By correcting pathogenic abnormalities in gene splicing or expression, oligonucleotide therapeutics offer a combination of extreme specificity and disease-modifying or even curative effects. However, achieving robust delivery to the CNS after systemic administration remains a significant challenge due to the presence of the blood-brain barrier and the intrinsic physicochemical limitations of oligonucleotide therapeutics, such as their large molecular size, high charge, and susceptibility to enzymatic degradation. Peptide-, antibody-, and lipid-based conjugates have emerged as versatile strategies for CNS oligonucleotide delivery, offering distinct advantages in molecular recognition, tunability, biocompatibility, and structural uniformity. Here, we review emerging design principles for engineering peptide, antibody, and lipid conjugates to enhance binding affinity, target selectivity, pharmacokinetics, and pharmacodynamics of oligonucleotide therapeutics for CNS applications. We also discuss how engineered delivery platforms have the potential to improve therapeutic efficacy across a spectrum of neurological disorders, from rare hereditary syndromes to highly prevalent neurodegenerative diseases.
    Keywords:  BBB; Brain; Drug delivery; Genetic medicine; Nucleic acid; Spinal cord
    DOI:  https://doi.org/10.1016/j.addr.2026.115778
  25. Front Immunol. 2025 ;16 1706045
       Objective: This study aimed to investigate mitochondrial dysfunction and its role in the pathogenesis of Fabry disease (FD) by analyzing circulating cell-free DNA (ccf-DNA) in patients with FD.
    Methods: Sixty-six FD patients and 21 healthy controls (ctrls) were enrolled. Levels of plasma mitochondrial- (ccf-mtDNA) and nuclear-derived ccf-DNA (ccf-nDNA) were quantified by quantitative reverse-transcription PCR (RT-qPCR), and 14 inflammatory cytokines were measured in treatment-naïve patients. Associations among ccf-DNA levels, cytokine profiles, disease biomarkers, and clinical markers were analyzed, with subgroup analyses stratified by sex, genotype, clinical subtype, and disease severity.
    Results: Treatment-naïve patients exhibited significantly higher ccf-mtDNA (z=-4.530, P-adj<0.001) and mtDNA/nDNA ratio (z=-2.613, P-adj=0.014) compared with ctrls. In the long-term enzyme replacement therapy (ERT) group (> 12 months), ccf-mtDNA copy number remained elevated (z=-3.141, P-adj=0.006), whereas the mtDNA/nDNA ratio did not differ significantly (z=-1.013, P-adj=0.311). No differences in ccf-nDNA were observed between treatment-naïve patients or the long-term ERT group compared with ctrls. Receiver operating characteristic analysis demonstrated the strong diagnostic performance of ccf-mtDNA (area under the curve=0.860), with 70% sensitivity and 91% specificity at an optimal cut-off value of 1,793,188.04 copies. Both ccf-mtDNA and mtDNA/nDNA ratio correlated positively with inflammatory cytokines including interleukin-17F and tumor necrosis factor-β, with stronger associations observed in male patients with classic FD. No correlations were observed with disease duration, α-galactosidase A activity, plasma globotriaosylsphingosine or clinical markers after adjustment for age and sex. Similarly, ccf-DNA measures did not differ significantly by sex, GLA mutation type (truncated vs. non-truncated), FD subtype (classic vs. non-classic), or across subgroups defined by disease severity or organ involvement (high vs. low MSSI, with or without hypertrophic cardiomyopathy, with or without chronic kidney disease, mild vs. severe white matter lesions, with or without neuralgia, or mild vs. severe pain).
    Conclusions: Mitochondrial dysfunction, reflected by elevated ccf-mtDNA, is implicated in FD pathogenesis and may be linked to inflammatory activation. ccf-mtDNA represents a promising diagnostic biomarker for FD, potentially offering an additional therapeutic target when combined with ERT.
    Keywords:  Fabry disease; ccf-mtDNA; enzyme replacement therapy; inflammatory cytokines; mitochondrial dysfunction
    DOI:  https://doi.org/10.3389/fimmu.2025.1706045
  26. Open Forum Infect Dis. 2026 Jan;13(1): ofaf811
       Background: Mitochondrial dysfunction is implicated in the development of diabetes mellitus (DM), which is more common in people with HIV (PWH) than in people without HIV (PWoH). Variation in mitochondrial DNA (mtDNA) and mitochondrial-toxic antiretroviral therapy (ART) may influence the susceptibility to DM but is underexplored in men with HIV.
    Methods: Men from the Multicenter AIDS Cohort Study (MACS) without DM and with fasting glucose data were included. Type 2 DM was defined by fasting glucose ≥ 126 mg/dL, DM medication use, a DM diagnosis, or hemoglobin A1c ≥ 6.5%. Exposure to mitochondrial-toxic ART (D-drugs or zidovudine) was categorized as a binary variable based on ever or never exposed. Mitochondrial DNA haplogroups were determined using HaploGrep from genotyping data. Associations between incident DM, mtDNA haplogroups of European and African origin, and interactions between mtDNA haplogroups and mitochondrial-toxic ART were analyzed.
    Results: Among 2598 men (667 self-reported as non-Hispanic Black and 1616 self-reported as non-Hispanic White), 1349 were men with HIV. In PWH, African haplogroup L3 was associated with a higher risk of incident DM (hazard ratio [HR], 1.92; 95% CI, 1.19-3.10) compared to other African-ancestry haplogroups, after adjusting for principal components of nuclear genetic ancestry, age, body mass index, hepatitis B and C status, smoking, and HIV-specific factors. D-drugs were independently associated with an increased risk of developing DM (HR, 2.8; 95% CI, 1.5-5.3).
    Conclusions: The African mtDNA haplogroup L3 increased the risk of incident DM in men with HIV. In PWH, D-drugs independently increased the risk of DM.
    Keywords:  HIV; aging; diabetes mellitus; mitochondrial genetics; mitochondrial-toxic antiretroviral therapy
    DOI:  https://doi.org/10.1093/ofid/ofaf811
  27. Biomed J. 2026 Jan 17. pii: S2319-4170(26)00004-1. [Epub ahead of print] 100948
      Cellular senescence is a stress-induced cellular state that contributes to tissue dysfunction, chronic inflammation, and a broad range of aging-associated pathologies. The accumulation of senescent cells (SnCs) disrupt normal tissue function, positioning them as drivers of pathological decline and therapeutic targets for aging intervention. Accordingly, multiple senescence-targeted strategies have been developed, including senolytics, senomorphics, senescence immunotherapy, and restoration-oriented interventions. These approaches aim to mitigate senescence-driven pathology by eliminating senescent cells, modulating their secretory activity, or restoring cellular function. Ongoing advancements will require precise stratification of senescent states, careful assessment of long-term safety, and the integration of optimized delivery systems for targeted therapeutic outcomes.
    Keywords:  Cellular senescence; Restoration-oriented interventions; Senescence immunotherapy; Senolytics; Senomorphics
    DOI:  https://doi.org/10.1016/j.bj.2026.100948
  28. Pharm Sci Adv. 2024 Dec;2 100041
      Effective clinical methods are urgently required to treat brain diseases. Small interfering RNAs (siRNAs) are promising in the treatment of brain diseases because of their ability to target and specifically silence genes associated with disease progression. However, their effectiveness is hindered by physiological barriers such as enzymatic degradation, the blood-brain barrier, and the blood-brain tumor barrier, severely restricting them from reaching the desired target sites. The development of nanotechnology has made the effective delivery of siRNAs to the brain possible. This is accomplished by encapsulating siRNAs in cationic polymers, liposomes, or micelles to improve their stability and targeting efficiency. In this review, we first analyzed the limitations of siRNA delivery in brain diseases such as brain tumors, stroke, and neurodegenerative diseases. Next, we summarized how nanotechnology can offer a solution by enabling effective siRNA delivery to the brain and improving the intracellular transfection efficiency of siRNA. Finally, we discussed the challenges and future advances of siRNA-based delivery systems to facilitate their clinical translation. This review emphasizes the importance of overcoming physiological barriers associated with siRNA delivery and highlights recent advances in the rational design of siRNA-based delivery systems for the effective treatment of brain diseases.
    Keywords:  Blood-brain barrier; Brain diseases; Brain targeting; Delivery systems; siRNA therapy
    DOI:  https://doi.org/10.1016/j.pscia.2024.100041
  29. Ann Med. 2026 Dec;58(1): 2619216
       BACKGROUND: GPR3(G-protein-coupled receptor 3), an orphan G-protein-coupled receptor (GPCR) with constitutive Gs activity, is expressed in the brain, liver, ovary, and other tissues, regulating cell proliferation, differentiation, and apoptosis across the nervous, reproductive, immune, and metabolic systems. This review synthesizes evidence on its integrated signaling and physiological functions to address the lack of a comprehensive multisystem pathophysiology overview.
    METHODS: A systematic literature search was conducted on PubMed and Web of Science, using keywords such as "GPR3", "GPCR", "neurodegeneration", "metabolism", "immune", "reproduction", "agonist", "inhibitor", and "therapeutic target". This search identified GPR3's roles in neurodegenerative diseases, immune inflammation, reproduction, and energy metabolism. The analysis focused on signaling pathways, ligand regulation, and therapeutic potential.
    RESULTS: The research indicates that GPR3 is involved in neuronal survival, synaptic plasticity, and microglial activity via the cAMP/PKA, PI3K/Akt, and β - arrestin pathways. It promotes amyloid - β formation in Alzheimer's disease (AD), yet provides neuroprotection in Parkinson's disease (PD) models. It may contribute to anxiety/depression - like states, maintain oocyte meiotic arrest in the ovary, and activate thermogenic genes in adipose tissue. GPR3 modulates immune responses. Using oleic acid (OA) and diphenyleneiodonium (DPI) as activators, and AF64394 and cannabidiol (CBD) as antagonists, it shows potential in disease models.
    CONCLUSION: GPR3 acts as a central molecular hub integrating neural, metabolic, immune, and reproductive signaling, highlighting its potential as a therapeutic target for chronic multisystem disorders. However, its dual roles in certain pathologies and translation challenges necessitate further research.
    Keywords:  G protein-coupled receptor; GPR3; signal transduction
    DOI:  https://doi.org/10.1080/07853890.2026.2619216
  30. Front Genet. 2025 ;16 1682085
       Background: Primary coenzyme Q10 (CoQ10) deficiency is a rare, treatable mitochondrial disorder often caused by biallelic pathogenic variants in COQ8A gene (also known as ADCK3). It typically manifests as childhood-onset cerebellar ataxia with variable multisystem involvement. Early recognition is critical, as CoQ10 supplementation has potential to significantly alleviate clinical manifestations and modify natural progression of the disease. Here, we provide a rare phenotype of paroxysmal dyskinesias caused by compound heterozygous variants of COQ8A gene.
    Case: A 21-year-old man presented with myoclonic tremor, mild dysarthria, ataxia and emotional instability. The brain MRI showed cerebellar atrophy. Biochemical workup revealed low plasma CoQ10 levels. Whole-exome sequencing identified compound heterozygous COQ8A variants: two novel missense substitutions [NM_020247.5:c.641T>A (p.Leu214Gln), NM_020247.5:c.1621T>C (p.Ser541Pro)], each inherited from an asymptomatic parent. The patient was initiated on oral CoQ10 at a dose of 200 mg twice daily, accompanied by supportive interventions targeting emotional regulation. A marked improvement in tremor symptoms was observed shortly after treatment initiation; however, intermittent muscle tremors persisted during periods of emotional agitation. At 1-year follow-up, the patient remained on CoQ10 at 300 mg twice daily and levetiracetam at 500 mg twice daily, with sustained symptom control.
    Conclusion: This case highlights that COQ8A-related CoQ10 deficiency can present with serious neurological crises among young people and underscores the importance of rapid genetic diagnosis in such scenarios. Early and aggressive CoQ10 supplementation led to clinical stabilization in our patient, reinforcing that primary CoQ10 deficiency is a reversible cause of neurodegenerative disease. We emphasize genotype-phenotype diversity in COQ8A disease and the crucial need for early detection and treatment to improve prognosis. We propose that clinicians maintain a high index of suspicion for primary CoQ10 deficiency in patients presenting with unexplained dystonia or ataxia, as timely intervention may significantly improve clinical outcomes.
    Keywords:  COQ8A gene; mitochondrial disorders (MIDs); movement disorder; myoclonic tremor; primary coenzyme Q10 deficiency
    DOI:  https://doi.org/10.3389/fgene.2025.1682085
  31. Dermatopathology (Basel). 2026 Jan 16. pii: 7. [Epub ahead of print]13(1):
       BACKGROUND: Behçet-like syndrome (BLS) refers to the presence of Behçet's disease (BD) features occurring in association with distinct clinical-pathological conditions such as inborn errors of immunity, myeloproliferative disorders, infections, or drug exposure. BLS may differ clinically from BD and is increasingly recognized as a separate entity. Distinguishing BLS from primary BD is essential for appropriate management, and studying BLS may provide insights into BD pathogenesis.
    OBJECTIVES: To summarize clinical features, treatments, and genetic abnormalities reported in BLS, we reviewed all published cases up to January 2024.
    METHODS: A systematic search of PubMed, Scopus, and Embase was performed using the terms "Behçet-like syndrome", "Behçet-like disease", and "Pseudo-Behçet disease". We included English-language reports of patients > 12 years old with a defined underlying etiology and Behçet-like manifestations, defined by ≥2 ICBD criteria and/or gastrointestinal involvement, mucosal ulcers, thrombosis, or non-recurrent disease. Epidemiological, clinical, laboratory, histological, and treatment data were extracted and analyzed descriptively.
    RESULTS: Of 679 publications, 53 met inclusion criteria, comprising 100 patients with BLS. The median age was 44 years (IQR 22-52), with a female predominance (1:2). Fifty-three percent were from non-European countries. A genetic disorder was identified in 70% of cases, while HLA-B51 was present in 10%. Frequent manifestations included skin lesions (68%), fever (56%), intestinal involvement (43%), and joint symptoms (43%). Treatments included glucocorticoids (65%), conventional DMARDs (32%), and biologics (22%), mainly anti-TNF agents. Antiviral/antibiotic therapy was used in 9% and chemotherapy in 15%. Two patients with trisomy-8 MDS underwent allogeneic stem cell transplantation.
    CONCLUSIONS: Diverse conditions-including monogenic diseases, immune defects, myeloproliferative disorders, infections, and drug-related reactions-can produce Behçet-like features. Our findings highlight differences in clinical expression and treatment response across BLS etiologies. Recognizing BLS is essential for appropriate management and may contribute to a deeper understanding of BD pathogenesis and future targeted therapies.
    Keywords:  Behçet-like syndrome; Behçet’s disease; HLA-B51; autoinflammatory disorders; genetic predisposition; immune dysregulation; immunotherapy
    DOI:  https://doi.org/10.3390/dermatopathology13010007
  32. Yi Chuan. 2026 Jan 20. 48(1): 46-60
      Single nucleotide variants (SNVs) are among the primary pathogenic factors of human genetic diseases, accounting for a significant proportion of all mutation types. Conducting in-depth research on the pathogenic significance of these mutations in animal models is essential for understanding disease mechanisms and developing therapeutic strategies. The progress of such research largely depends on the continuous innovation and advancement of gene editing technologies. In recent years, base editing technology based on the CRISPR/Cas9 system has emerged, enabling precise conversion of individual nucleotides. Owing to its efficiency and convenience, base editing has been widely applied in gene therapy, the construction of animal models, and molecular breeding, bringing new breakthroughs and opportunities to life sciences and medical research. Zebrafish, with their advantages of small size, high fecundity, transparent embryos, and external development, have become an ideal model organism for studying disease mechanisms and drug screening. In this review, we summarize the development of CRISPR/Cas9-based base editing technologies, highlight the emergence of novel editing tools, and explore the application and progress of base editing in constructing precise zebrafish disease models.
    Keywords:  CRISPR/Cas9; base editing; disease model; genome editing; zebrafish
    DOI:  https://doi.org/10.16288/j.yczz.25-157
  33. Int J Psychiatry Clin Pract. 2026 Jan 23. 1-14
      Oxidative stress and enhanced free radical production with subsequent mitochondrial dysfunction and neurodegeneration are major pathomechanisms for the ageing spectrum of neurocognitive disorders ranging from subjective cognitive decline over mild cognitive impairment to Alzheimer's disease (AD) and vascular mild cognitive impairment (MCI) and vascular dementia (VD). Due to its radical scavenging, antioxidative and mitochondrial function-improving properties standardised Ginkgo biloba extracts (GBE) target several key processes of neurodegeneration. These include mitochondrial dysfunction, impaired mitochondrial quality control, and reduced energy metabolism. GBE's benefits also include supporting neuroplasticity, the brain's ability to form new neural connections, and reducing neuroinflammation, a major driver of disease progression in neurodegenerative conditions. As a consequence, GBE improves several aspects of cognitive dysfunction within the broad spectrum of neurocognitive disorders as indicated by a large body of evidence from randomised controlled studies.
    Keywords:  Alzheimer’s disease; Standardised Ginkgo biloba extract; ageing spectrum; mild cognitive impairment; neuroprotection; vascular cognitive impairment
    DOI:  https://doi.org/10.1080/13651501.2026.2617217
  34. Front Immunol. 2025 ;16 1628503
      Bacterial meningitis represents a devastating inflammatory disease of the central nervous system (CNS), characterized by the invasion of pathogens across the blood-brain barrier (BBB) and subsequent dysregulated immune responses. Key inflammatory mechanisms include pathogen recognition by microglial TLRs and NLRP3, neutrophil infiltration, and cytokine storms such as IL-1β and TNF-α, leading to BBB disruption, cerebral edema, and neuronal injury. Despite antimicrobial therapy, excessive inflammation often results in neurological sequelae. Emerging strategies target immunomodulation through inflammasome inhibitors and BBB preservation using nanoparticle drug delivery to mitigate inflammation-driven CNS damage. This review focuses on the intricate interplay between bacterial virulence factors and neuroinflammatory cascades, with particular emphasis on Streptococcus pneumoniae as a model pathogen. By integrating recent advances in molecular pathogenesis and translational immunology, this review provides a framework for developing precision therapies to mitigate inflammation-mediated CNS damage in bacterial meningitis.
    Keywords:  bacterial meningitis; blood-brain barrier; molecular pathogenesis; neuroinflammation; streptococcal pathogens
    DOI:  https://doi.org/10.3389/fimmu.2025.1628503
  35. Curr Mol Med. 2026 Jan 13.
       INTRODUCTION: Stem cells play a pivotal role in immunomodulation and tissue repair, and their functions can be influenced by TLR signaling. The Toll/interleukin-1 receptor domain-containing protein C (TcpC), secreted by Uropathogenic Escherichia coli, can inhibit host immunity by interfering with TLR pathways. As mitochondria are crucial for stem cell function, there may be links between TcpC and mitochondrial homeostasis.
    METHODS: We isolated MSC mitochondria using magnetic beads coated with a monoclonal antibody against the outer mitochondrial membrane protein OMP25 and conducted a proteomic study to examine the MSC mitochondrial proteome with or without TcpC. Bioinformatics analyses, including Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment, and proteinprotein interaction (PPI) network analysis, were employed.
    RESULTS: A total of 33 proteins with significant changes in abundance were identified: 4 increased in abundance, including glycolytic enzymes (Pkm [FC=1.6599, p=0.0217]) and stress response proteins (Ywhaq [FC=1.4666, p=0.04502]); and 29 decreased, mainly related to mitochondrial oxidative phosphorylation (e.g., Atp5f1e [FC=0.001, p=0.00120], Ndufa11 [FC=0.001, p=0.00674]) and protein quality control (e.g., Grpel1 [FC=0.46663, p=0.02083], Hspa9 [FC=0.48089, p=0.0435], Pitrm1 [FC=0.12764, p=0.01388]).
    DISCUSSION: The possible effects of TcpC on the MSC mitochondrial proteome are reported here for the first time. This information provides a clearer understanding of MSCs in the context of infectious disease and offers a scientific basis for future stem cell therapy research.
    CONCLUSION: TCP-C intervention leads to a series of differentially expressed proteins in MSC mitochondria, which are involved in several functional clusters, including oxidative phosphorylation, respiratory electron transport, the tricarboxylic acid cycle, glyoxylate and dicarboxylate metabolism, branched-chain amino acid catabolism, and cristae formation.
    Keywords:  Mesenchymal stem cells; Mitochondria; TCPC; oxidative phosphorylation; protein quality control.; proteomics
    DOI:  https://doi.org/10.2174/0115665240411988251128121911