bims-mistre Biomed News
on Mito stress
Issue of 2026–03–15
nineteen papers selected by
Ellen Siobhan Mitchell, MitoQ



  1. Front Cell Dev Biol. 2026 ;14 1771546
      Premature ovarian insufficiency (POI) is more than a fertility issue; it's a silent epidemic of accelerated systemic aging in young women, with current treatments failing to address its root cause. For too long, the relentless decline of ovarian function has been viewed as an inevitable mystery. But what if the ovary holds an internal "inflammatory clock," ticking away with each cellular insult and dictating the pace of its own decline? Here, we spotlight a surprising culprit: the cGAS-STING signaling pathway. Far beyond its day job in antiviral defense, this pathway emerges as a master integrator of ovarian aging. We reveal how stresses like DNA damage and mitochondrial dysfunction leak genetic material into the cell's interior, where cGAS-STING sounds a relentless alarm. This alarm does not just trigger inflammation; it initiates a vicious, self-amplifying cycle of cellular senescence, tissue fibrosis, and follicle destruction-a cycle that may explain why ovarian aging often feels like a one-way street. Therapeutically, we move beyond mere symptom management to explore strategies for resetting this inflammatory clock. We dissect both direct "brakes"-novel small molecules that silence cGAS or STING-and upstream "shields" that protect cellular powerplants and genome integrity. Most provocatively, we introduce the concept of "signal reprogramming": not just shutting down the pathway, but cleverly rewiring its output to favor repair over destruction. By repositioning cGAS-STING from a simple sensor to the central processor of ovarian aging, this review charts a course for a new class of therapeutics aimed at preserving ovarian function, not just managing its loss. The goal is no less than transforming our approach to women's reproductive longevity.
    Keywords:  cGAS-STING; inflammation; ovarian aging; premature ovarian insufficiency; therapeutic targets
    DOI:  https://doi.org/10.3389/fcell.2026.1771546
  2. J Affect Disord. 2026 Mar 06. pii: S0165-0327(26)00439-8. [Epub ahead of print] 121588
      Major depressive disorder (MDD) is a leading cause of disability worldwide, and depression in older adults is an increasingly urgent public health concern. While psychosocial contributors to late-life depression have been extensively studied, the underlying biochemical mechanisms remain less well understood. Mitochondria, critical for neuronal energy production, function, and survival, have been implicated in depression, and mitochondrial alterations have also been linked to changes in sex hormone levels. This is a secondary analysis of an observational study of cognitively unimpaired older adults with and without MDD (N = 112) who were followed for three years. We analyzed the baseline data of an observational study to examine the relationship between depression status and mitochondrial function, using plasma levels of circulating cell-free mitochondrial DNA (ccf-mtDNA) and mitochondrial DNA encapsulated in extracellular vesicles (EV-mtDNA). We also examined the association between mitochondrial function and biological sex as well as interactions with depression status. Across all participants, we observed moderately strong correlations (r = 0.42-0.53) between plasma levels of ccf-mtDNA and EV-mtDNA. Group-level analyses showed elevated levels of both EV-mtDNA and ccf-mtDNA in the depressed group, with depression severity positively associated with both measures in a sex-specific manner. Importantly, older depressed females exhibited higher EV-mtDNA levels compared to older depressed males, while older depressed males showed higher ccf-mtDNA levels compared to their female counterparts. These findings suggest that mitochondrial alterations in depression may be shaped by sex-specific biological pathways in the aging population.
    Keywords:  Depression; Mitochondrial DNA; Mitochondrial function
    DOI:  https://doi.org/10.1016/j.jad.2026.121588
  3. iScience. 2026 Mar 20. 29(3): 115023
      Glial cell line-derived neurotrophic factor family receptor α-like (GFRAL) is the exclusive receptor for growth differentiation factor 15 (GDF15) and plays distinct roles in various diseases. However, its impact on sarcopenia remains poorly understood. This study, including White British and Chinese participants, demonstrated that elevated serum levels of GDF15 and its receptor GFRAL are associated with an increased risk of sarcopenia, particularly among individuals with low physical performance. While GDF15 exerts effects across the whole population, GFRAL appears to be more detrimental in women. Complementary single-cell RNA sequencing and immunohistochemical analyses in animal models further support the involvement of the GDF15-GFRAL axis in mediating skeletal muscle damage. These findings highlight the clinical and preventive relevance of the GDF15-GFRAL axis and underscore the need for future mechanistic studies to elucidate its role in sarcopenia.
    Keywords:  health sciences
    DOI:  https://doi.org/10.1016/j.isci.2026.115023
  4. J Neurochem. 2026 Mar;170(3): e70394
      Glucocorticoids (GCs) are central to the organism's adaptation to stress, coordinating systemic energy distribution and neuroendocrine signaling. While acute effects of GCs are adaptive, chronic GC exposure is increasingly recognized as an important factor contributing to the pathophysiology of neuropsychiatric disorders, such as post-traumatic stress disorder (PTSD) or major depressive disorder (MDD). A piling evidence points to astrocytes as a central integrator of brain response to stress hormones, including GCs. In this review, we discuss a biphasic regulation of astrocyte metabolism by GCs. According to the hypothesis, astrocytes undergo metabolic adaptations in response to GC: acute exposure leads to the enhancement of astrocyte metabolism through upregulation of glycolysis, mitochondrial activation, and glutamate clearance. In turn, prolonged GC exposure induces a metabolic shift toward branched-chain amino acid and lipid catabolism, promoting mitochondrial reactive oxygen species (ROS) production and impairing key homeostatic functions, including the astrocyte-neuron lactate shuttle and calcium signaling. Progressive disruption of astrocytes' supporting function may subsequently lead to synaptic dysregulation and energy imbalance in stress-related brain pathology. We postulate that a detailed understanding of this dynamic regulation is necessary for targeting astrocyte-specific metabolic mechanisms in neuropsychiatric disorders.
    Keywords:  astrocyte metabolism; brain energy metabolism; glucocorticoid signaling; neuroenergetics
    DOI:  https://doi.org/10.1111/jnc.70394
  5. Nutrients. 2026 Feb 26. pii: 741. [Epub ahead of print]18(5):
      Background/Objectives: The menopausal decline in estrogen levels accelerates age-related changes, including visceral adiposity, insulin resistance, sarcopenia, osteoporosis, and endothelial dysfunction. While nutrition independently influences these outcomes, the interactive role of estrogen signaling and nutrient metabolism in healthy aging remains underexplored. This article evaluates these interactions. Methods: We conducted a narrative synthesis of studies examining estrogen's effects on energy balance, adipose regulation, muscle, bone, and cardiovascular health, with an emphasis on estrogen-like nutritional modulators and phytoestrogens. In addition, we present original experimental data from our laboratory investigating sex-specific vascular responses to G protein-coupled estrogen receptor (GPER) activation using functional myography in isolated rat aortic rings from young adult and middle-aged rats (n = 6-8 per group) to assess responses to the GPER agonist G-1 (1.0 μM). Results: Literature evidence demonstrates that estrogen supports macronutrient utilization, suppresses adipose inflammation, preserves bone density, and promotes endothelial function. Phytoestrogens may engage estrogen-responsive pathways to mitigate age-related physiological decline. Our original findings show that GPER agonism enhances both contractile and vasodilatory responses in female (p < 0.05) but not male rat aortas, providing mechanistic evidence of sex-specific vascular estrogen signaling. These results suggest that dietary phytoestrogens and nutrient-rich dietary patterns may, in part, activate GPER-dependent pathways to support cardiovascular resilience in aging women. Conclusions: Estrogen-nutrition interactions are central to metabolic adaptation and healthy aging. Our findings highlight GPER as a functionally resilient pathway in aging vasculature, offering a putative mechanistic link for nutritional modulation. However, direct translation of these findings to human clinical outcomes remains to be established. Precision nutrition strategies targeting GPER represent a promising framework for healthy aging, though large-scale human trials are necessary to confirm these receptor-specific effects.
    Keywords:  GPER; cardiovascular aging; cardiovascular health; endothelial dysfunction; estrogen receptors; metabolic dysfunction; nutrition; osteoporosis; phytoestrogens; postmenopausal health; sarcopenia
    DOI:  https://doi.org/10.3390/nu18050741
  6. Mol Biol Rep. 2026 Mar 07. pii: 476. [Epub ahead of print]53(1):
       BACKGROUND: Growth differentiation factor 15 (GDF15) is a biomarker for cardiovascular diseases, and its circulating levels are altered in preeclampsia (PE), which shares mechanisms with cardiovascular diseases. Several SNPs in the GDF15 locus were associated with GDF15 levels, including the GWAS lead SNP rs888663. However, no previous study had performed a functional characterization of rs888663 nor had tested the hypothesis that noncoding GDF15 SNPs affect GDF15 levels in PE or gestational hypertension (GH). We examined whether variation of rs888663 affects its enhancer activity, whether genotypes and haplotypes of rs888663 and rs1059369 are associated with PE or GH, and their effects on GDF15 levels in healthy pregnant (HP) women, and in patients with PE and GH.
    METHODS AND RESULTS: We studied 233 HP women, 188 patients with PE, and 197 patients with GH. We performed a dual-luciferase reporter assay testing both rs888663 alleles (G/T), which found that the rs888663 region is a functional enhancer, and the T allele had a significantly higher enhancer activity. Genotypes were determined by Taqman allele discrimination assays. Plasma GDF15 levels were measured by ELISA. GDF15 levels were lower in PE and GH than in HP (P < 0.01). Patients with PE and GH carrying the TT genotype for rs1059369 and 'T, T' haplotype showed lower GDF15 levels than HP women carrying the same genotype and haplotype, respectively (P < 0.05).
    CONCLUSION: Our findings identified a novel candidate enhancer of GDF15, with the rs888663 T allele leading to increased enhancer activity, and suggest that GDF15 SNPs affect GDF15 levels in PE or GH.
    Keywords:  Enhancer; Genetic polymorphisms; Gestational hypertension; Growth differentiation factor 15 (GDF15); Haplotypes; Preeclampsia
    DOI:  https://doi.org/10.1007/s11033-026-11629-w
  7. Biogerontology. 2026 Mar 07. pii: 69. [Epub ahead of print]27(2):
      Neurodegenerative diseases are strongly associated with aging and oxidative stress, underscoring the need for natural compounds that promote healthy aging. The mycosporine-like amino acid (MAA) "palythine", a photoprotective metabolite, exhibits promising bioactivity in mitigating age-related decline. Ultraviolet-B (UV-B, 280-315 nm) radiation is a major inducer of DNA damage, oxidative stress and apoptosis, all of which accelerate aging. In this study, we investigated the effects of palythine on oxidative stress and cognition using the transgenic, humanized model organism Caenorhabditis elegans. Palythine supplementation reduced key biomarkers of aging, including autofluorescence and lipid accumulation, while enhancing antioxidant enzyme activity. Stress resistance assays showed that UV-B exposure significantly reduced survival, whereas palythine improved UV-B resistance and extended longevity. Additionally, palythine preserved neuronal health by maintaining nicotinic acetylcholine receptor function and reducing α-synuclein aggregation, a hallmark of neurodegeneration. Since acetylcholine and dopamine are essential for cognition, behavior and motor function, these findings suggest that palythine enhances systemic health span. Overall, palythine emerges as a potent natural bioactive molecule with antioxidant, neuroprotective and anti-aging properties, supporting its potential as a therapeutic candidate for healthy aging and cognitive resilience.
    Keywords:   Caenorhabditis elegans ; Aging; Cognition; Neurodegenerative diseases; Palythine; UV-B radiation
    DOI:  https://doi.org/10.1007/s10522-026-10416-1
  8. Cell Rep Med. 2026 Mar 09. pii: S2666-3791(26)00073-X. [Epub ahead of print] 102656
      Post-bariatric hypoglycemia (PBH), characterized by excessive postprandial incretin and insulin secretion, is a common complication of bariatric surgery. Here, we investigate the relationship between PBH and growth differentiation factor 15 (GDF15) in individuals with PBH after Roux-en-Y gastric bypass (RYGB), post-RYGB individuals who remain asymptomatic (Asx), and individuals with overweight/obesity but without history of surgery (Ow/Ob). Fasting plasma GDF15 is higher in PBH vs. Ow/Ob and further increases postprandially, coinciding with hypoglycemia symptoms. During a hyperinsulinemic hypoglycemic clamp, GDF15 progressively increases in PBH and correlates with hypoglycemia survey symptoms, including weakness, difficulty concentrating, feeling cold, and tingling lips. In mice, insulin-induced hypoglycemia also results in elevated GDF15 levels, and exogenous recombinant GDF15 (rGDF15) reduces food intake in response to hypoglycemia. Our data suggest that GDF15 modulates the counterregulatory response to hypoglycemia in both PBH individuals and mice and that elevated GDF15 levels contribute to hypoglycemia-related postprandial symptoms. This study was registered at ClinicalTrials.gov (NCT04428866).
    Keywords:  GDF15; counterregulatory response; hypoglycemia; hypoglycemia symptoms; post-bariatric hypoglycemia
    DOI:  https://doi.org/10.1016/j.xcrm.2026.102656
  9. J Clin Med. 2026 Mar 01. pii: 1880. [Epub ahead of print]15(5):
      Preeclampsia (PE) has traditionally been regarded as a pregnancy-limited hypertensive disorder; however, accumulating evidence increasingly positions it as a pivotal early-life vascular stress test that manifests underlying vulnerabilities and accelerates biological aging. Women with a history of PE exhibit a heightened susceptibility to premature-onset multi-systemic diseases, specifically cardiovascular, ovarian, renal, and metabolic decline. This suggests that PE acts as a catalyst for accelerated aging, driven by shared pathophysiological pathways that represent common mechanisms of systemic senescence. This review provides a comprehensive analysis of the epidemiological links and pathogenic drivers underpinning accelerated systemic aging following PE, with a specific focus on the cardiovascular-ovarian axis. Epidemiological data consistently demonstrate that women with prior PE exhibit significantly reduced anti-Müllerian hormone (AMH) levels, translating to an estimated 1.5-year acceleration in reproductive aging. In parallel, PE is associated with a twofold increase in lifetime cardiovascular disease (CVD) risk and the onset of chronic hypertension occurring an average of 7.7 years earlier. However, reconciling the phenotypic heterogeneity of PE and transcending the constraints of non-experimental designs are essential for firmly establishing this accelerated aging paradigm. At the molecular level, PE and ovarian aging converge on shared pathways-including mitochondrial dysfunction, oxidative stress, inflammation, and epigenetic dysregulation-collectively defining a distinct pathogenic ovarian-vascular aging axis. Proposed geroscience-based strategies advocate for refined risk stratification by incorporating molecular aging biomarkers-such as epigenetic clocks and inflammatory profiles-alongside conventional clinical indicators. This integrative framework facilitates the early identification of high-risk aging phenotypes, enabling targeted monitoring and timely interventions to preemptively modulate accelerated aging pathways. Pharmacological approaches within this framework emphasize the judicious repurposing of established agents, such as metformin, statins, and SGLT2 inhibitors, while emerging gerotherapeutics, including senolytics and senomorphics, provide a conceptual foundation for targeting the fundamental biological drivers of senescence. Although these geroprotective strategies, including the repurposing of established agents and the use of senolytics, offer innovative conceptual frameworks for targeting the fundamental drivers of senescence, they remain largely exploratory and require further clinical validation. Such strategies offer novel opportunities to shift the clinical focus from treating isolated comorbidities to modulating the shared molecular substrates of aging, ultimately promoting healthy aging and functional longevity in the elderly female population.
    Keywords:  biological age; geroscience; ovarian senescence; preeclampsia; risk stratification; vascular aging
    DOI:  https://doi.org/10.3390/jcm15051880
  10. Nutrients. 2026 Feb 24. pii: 713. [Epub ahead of print]18(5):
      Background/Objetives: Menopause increases anxiety and depression risk, linked to gut microbiota changes. Probiotics show psychobiotic effects that could therapeutically alleviate these symptoms in menopausal women. However, this potential and its mechanism of action involving estrogen receptors remain largely unexplored. To investigate whether Lactobacillus reuteri RC-14® and Lactobacillus rhamnosus GR-1® exert anxiolytic-like and antidepressant-like effects in ovariectomized rats via estrogenic receptor (ER) activation. Methods: Ovariectomized adult female Wistar rats were divided into four groups: vehicle, probiotics (4.9 × 109), 17β-estradiol (0.09 mg/kg), and their combination. All treatments were administered for 28 days. Three additional groups (probiotics and 17β-estradiol) received tamoxifen (5 mg/kg) to block estrogen receptors. The elevated plus maze (EPM), open field test (OFT), and forced swim test (FST) were conducted to evaluate anxiety and depression-like behaviors. Data were analyzed using one-way ANOVA. Results: In the EPM, all active treatments enhanced open-arm exploration and reduced the anxiety index compared to the vehicle and tamoxifen groups. Similarly, in the FST, these treatments increased swimming behavior and decreased immobility regarding the same control groups. The anxiolytic- and antidepressant-like effects of all treatments were reverted by tamoxifen. No significant changes were observed in the OFT. Conclusions: The combination of probiotics and 17β-estradiol produces anxiolytic-like and antidepressant-like behavioral effects in this preclinical model, suggesting potential relevance for menopause-related affective symptoms by acting via estrogen receptors and the possible participation of serotonergic pathways. These preliminary findings are hypothesis-generating and require validation through long-term preclinical studies and carefully designed clinical trials before any therapeutic recommendations can be made regarding the use of probiotics for menopause-related affective symptoms.
    Keywords:  Lactobacillus reuteri; Lactobacillus rhamnosus; antidepressant; anxiolytic; elevated plus maze; estrogenic receptors; forced swim test
    DOI:  https://doi.org/10.3390/nu18050713
  11. ACS Chem Neurosci. 2026 Mar 12.
      Neurodegenerative diseases are a major threat to global public health. Recent studies have revealed that mitochondrial DNA damage and the imbalance of protein homeostasis during aging constitute the core pathological basis of neurodegeneration. The resulting energy metabolism disorders are the common pathogenic hubs of multiple neurodegenerative diseases. In this review, we focus on representative neurodegenerative diseases, including Parkinson's disease, Alzheimer's disease, and Huntington's disease, and systematically discuss their pathology related to metabolic disorders. We introduce various energy compensation strategies: (1) rebuilding the energy supply by enhancing mitochondrial function; (2) implementing systemic metabolic remodeling; (3) supplementing alternative energy substrates; (4) utilizing direct energy delivery technology. This review also highlights the technical bottlenecks of existing energy compensation strategies, guiding future research on neurodegenerative diseases.
    Keywords:  eirect energy delivery; energy compensation; energy substrate supplementation; metabolic reprogramming; mitochondria-targeted therapies; neurodegenerative diseases
    DOI:  https://doi.org/10.1021/acschemneuro.5c00964
  12. Nutrients. 2026 Mar 07. pii: 860. [Epub ahead of print]18(5):
      Background: Low estrogen levels during menopause reduce nitric oxide (NO) production, contributing to decline in skeletal muscle quality and function. Although acute and short-term dietary nitrate supplementation has demonstrated promising effects, long-term benefits, particularly on muscle quality in postmenopausal women, are not well established. Objectives: The objective was to investigate the effects of long-term (12-week) nitrate-rich beetroot extract supplementation on morphological and functional muscle quality, rate of force development (RFD), maximal strength, and circulating nitrate/nitrite concentrations in postmenopausal women. Methods: In a randomized, double-blind, placebo-controlled design, 20 postmenopausal women (21 years ± 7 since menopause) consumed 20 g/day of a nitrate-rich beetroot extract (BET; 548 mg nitrate/day) or a nitrate-depleted beetroot extract (PLA; 43 mg nitrate/day) for 12 weeks. Outcome measures, including muscle quality (functional via muscle strength/thickness ratio; morphological via ultrasound echo intensity), RFD, maximal voluntary isometric contraction (MVIC), and serum nitrate/nitrite levels, were evaluated at baseline, 8 weeks, and 12 weeks. Results: BET significantly increased serum nitrate (0.005) and nitrite (0.022) levels compared to PLA at both week 8 and week 12. Morphological muscle quality also improved significantly in the BET group (interaction effect, p = 0.014). Early-phase rate of force development (RFD) increased between 30 and 100 ms, whereas late-phase RFD increased between 100 and 200 ms. RFDpeak also improved by week 8, and these gains were maintained through week 12 (interaction effect, p < 0.05). Although there was no significant difference between groups for functional muscle quality, MVIC increased at week 12 in the BET group, but no significant Time × Group interaction was observed. Conclusions: Twelve weeks of nitrate-rich beetroot extract supplementation improved morphological muscle quality and RFD, suggesting potential clinical relevance for preventing structural and neuromuscular function decline in postmenopausal women. This study was registered with ReBEC (RBR-87qh649) and approved on 8 October 2024.
    Keywords:  aging; dietary supplements; functional foods; muscle function; nitric oxide; vegetables
    DOI:  https://doi.org/10.3390/nu18050860
  13. Nutrients. 2026 Feb 27. pii: 789. [Epub ahead of print]18(5):
       BACKGROUND/OBJECTIVES: Advanced glycation end products (AGEs) and oxidative stress increase with aging and are implicated in Alzheimer's disease (AD). We developed an anti-glycation blend using LC-MS-based screening and assessed its effects on oxidative and glycation-related biomarkers in humans.
    METHODS: Twelve candidate compounds were screened in a BSA-glucose model using LC-MS peptide mapping to quantify lysine glycation and rank inhibitory activity. The top candidates were combined into a three-compound blend (quercetin, rutin, genistein). In a randomized, double-blind, placebo-controlled 3-month trial, older healthy adults (n = 30) and individuals with AD (n = 30) received anti-AGE blend (n = 15 in older group and n = 15 in AD group) or placebo (n = 15 in older group and n = 15 in AD group). Serum malondialdehyde and urinary Nε-(carboxymethyl)lysine were measured pre-post intervention. Pre/post and between-arm comparisons within each population were performed using REML ANOVA with Tukey post hoc tests. Serum MDA (malondialdehyde) and urinary CML (Nε-(carboxymethyl)lysine) were prespecified biomarker outcomes and are reported here as co-primary biomarker endpoints. No formal a priori sample size calculation was performed; the study size was feasibility-based.
    RESULTS: LC-MS screening identified genistein, quercetin, and rutin as the most consistent inhibitors of glucose-driven BSA glycation. In older healthy adults, serum MDA decreased after anti-AGE supplementation (p < 0.001) and differed from the placebo (p < 0.01), while no change was observed within the placebo group (ns). In the AD cohort, MDA did not change significantly from baseline within either arm (ns), but post-intervention MDA was lower in anti-AGE than in the placebo (p < 0.05). Urinary CML was unchanged in older healthy adults (ns in both arms), whereas in AD, it decreased after anti-AGE supplementation (p < 0.01) and differed from the placebo (p < 0.05).
    CONCLUSIONS: A screening-guided anti-glycation blend supplementation was associated with changes in selected biomarkers in humans: MDA decreased across cohorts, while CML decreased selectively in AD. Larger trials with extended biomarker panels and LC-MS/MS confirmation are warranted.
    Keywords:  Alzheimer’s disease; aging; neurodegeneration; oxidative stress; phytocomplex
    DOI:  https://doi.org/10.3390/nu18050789
  14. Front Aging. 2026 ;7 1707614
      Ovarian aging is increasingly recognized as a dynamic and modifiable process influenced by oxidative stress, mitochondrial dysfunction, and chronic inflammation. This review outlines the mechanisms by which environmental and lifestyle factors, such as smoking, high-fat diets, endocrine-disrupting chemicals, and micro- and nanoplastics (MNPs), contribute to accelerated ovarian decline and premature reproductive senescence. The distinction between physiological aging and pathological processes such as "inflamm-aging" is discussed, with particular attention to redox imbalance and mitochondrial impairment as key drivers of follicular depletion and endocrine dysfunction. Insights from experimental models of premature ovarian insufficiency and polycystic ovary syndrome are summarized to illustrate the role of reactive oxygen species and oxidative damage. Current antioxidant-based strategies aimed at delaying ovarian aging are reviewed, including melatonin, N-acetylcysteine, coenzyme Q10, polyphenols, and vitamins C and E. Particular emphasis is placed on the emerging potential of stem cell-derived extracellular vesicles (EVs) as a novel, cell-free therapeutic approach. Preclinical evidence suggests that EVs can reduce oxidative stress, support mitochondrial function, and restore ovarian physiology. Overall, the review highlights how redox-targeted and EV-based interventions may offer promising avenues to preserve ovarian function and extend reproductive healthspan.
    Keywords:  extracellular vesicles (EVs); mitochondrial dysfunction; ovarian aging; ovarian dysfunction; oxidative stress
    DOI:  https://doi.org/10.3389/fragi.2026.1707614
  15. Cells. 2026 Mar 03. pii: 452. [Epub ahead of print]15(5):
      Mitochondrial dysfunction is an early driver of Alzheimer's disease (AD), and the decline in sex hormones, including 17β-estradiol (E2), at menopause has been linked to AD risk in women. While E2 exerts potent neuroprotective and mitochondrial-regulatory effects, its clinical utility in estrogen replacement therapy (ERT) may be limited by thrombotic and oncologic risks. Estetrol (E4), a fetal estrogen with a selective safety profile, may represent a promising alternative. This study evaluated the impact of E4 on mitochondrial bioenergetics and neuronal morphology in human SH-SY5Y neuroblastoma cells, including models of AD-related amyloidopathy (amyloid precursor protein overexpression) and tauopathy (P301Ltau mutation overexpression). E4 significantly enhanced ATP levels, mitochondrial membrane potential, and oxidative respiration in all cell models, notably outperforming E2 in P301L cells. E4 also promoted significant neurite outgrowth, alleviating deficits observed in AD models. In addition, we demonstrated that the bioenergetic effects of E4 were mediated by the estrogen receptors ERα, ERβ, and GPER1. Furthermore, E4 modulated the expression of key mitochondrial genes, specifically upregulating the phosphate carrier SLC25A23 while downregulating the complex I subunit NDUFA1. In conclusion, E4 improves mitochondrial health and supports neuronal integrity via a multi-receptor mechanism, highlighting its potential as a safe neuroprotective therapy for AD.
    Keywords:  Alzheimer’s disease; amyloid-β; bioenergetics; estetrol (E4); estradiol (E2); estrogen receptors; mitochondria; neurite outgrowth; tau protein
    DOI:  https://doi.org/10.3390/cells15050452
  16. Menopause. 2026 Mar 10.
       OBJECTIVES: This study investigated whether earlier menopause is associated with reduced later-life cognitive performance and brain structure in a population-based cohort. It is among a few studies examining both cognition and neuroimaging within the same postmenopausal sample, and the first to test whether gray matter volume mediates the relationship between menopause timing and cognitive performance within the same sample.
    METHODS: We analyzed data from the Cambridge Centre of Neuroscience and Aging, including 747 postmenopausal women who underwent cognitive testing. A subset was additionally tested with a fluid intelligence test and structural brain scans. Multiple linear regression models evaluated the association between menopause age, cognitive performance, and gray matter volume, controlling for chronological age, education, depressive symptoms, and physical activity.
    RESULTS: Earlier menopause was associated with lower cognitive performance (t717=2.2, P=0.028) and fluid intelligence (t153=1.59, P=0.026). Structural imaging analyses (n=182) revealed that earlier menopause was associated with decreased total gray matter volume (t182=0.152, P=0.024). Exploratory mediation analysis showed that total gray matter volume partially mediated the relationship between age at menopause and cognitive performance (P=0.006).
    CONCLUSIONS: In this population-based cohort, earlier menopause was associated with both lower cognitive performance and reduced gray matter volume, suggesting a potential mechanism linking earlier menopause to cognitive decline. However, the cross-sectional nature of this study prevents causal conclusions, and longitudinal research is needed to establish causal links and explore potential targeted interventions.
    Keywords:  Cognition; Gray matter volume; Menopause; Menopause timing; Neuroimaging; Women’s health.
    DOI:  https://doi.org/10.1097/GME.0000000000002765
  17. Molecules. 2026 Feb 25. pii: 763. [Epub ahead of print]31(5):
      With the intensification of social aging and the improvement of living standards, delaying aging has become a focus of common concern, especially in regard to skin aging. Although collagen peptides have been widely reported as therapeutic agents in relieving skin aging, the molecular mechanisms remain inadequately elucidated. This review emphasizes that the alleviation of skin aging by collagen peptides is a systematic and complex process, including the removal of reactive oxygen species, inhibition of inflammation, inhibition of extracellular matrix (ECM) degradation and melanin deposition, activation of lysosomal and mitochondrial function, and promotion of ECM synthesis. It also highlights that lysosomes and mitochondria may be the key organelles that regulate collagen peptides to alleviate skin aging. Current research on the mechanism of collagen peptides in alleviating skin aging still requires bold breakthroughs and should not be confined to the transforming growth factor (TGF-β)/Smad, mitogen-activated protein kinase, and nuclear factor kappa-B pathways. In addition, many natural antioxidant components have been proven to alleviate skin aging by regulating organelle function. Therefore, the regulatory effects of collagen peptides with antioxidant activity on mitochondrial and lysosome functions in aging skin need more attention and exploration, which is of great significance for further research on precise skin care and targeted anti-skin aging therapy.
    Keywords:  collagen peptides; lysosomes; mitochondria; precise anti-aging; skin aging
    DOI:  https://doi.org/10.3390/molecules31050763
  18. Drug Des Devel Ther. 2026 ;20 583321
       Background: Poor ovarian response (POR) is a serious problem that decreases the effectiveness of conventional ovarian stimulation. Its concern is elevated production of reactive oxygen species, causing DNA destruction and mitochondrial malfunction, which contributes to the decline in oocyte quality.
    Objective of the Study: This trial aimed to identify the impact of Coenzyme Q10 as an antioxidant on ovarian reserve markers and Intra-cytoplasmic sperm injection results in poor ovarian responders.
    Methods: A prospective controlled study included 100 patients classified as poor ovarian responders according to the Bologna criteria. The patients were randomly allocated to two groups. Fifty participants in group A were administrated Coenzyme Q10 plus folic acid for one month prior to the ICSI cycle and through the ICSI cycle. Fifty patients in group B were administrated folic acid only for a similar duration. The primary outcome measured was the count of oocytes obtained. The chemical pregnancy rate was considered a secondary outcome.
    Results: The baseline features were equivalent among the groups. CoQ10 markedly improved the oocyte count and peak E2 (p <0.001). Higher levels of antral follicle count at the start of the induction were observed in the treated group (p= 0.001). Endometrial thickness was greater in the CoQ10 group than in the control group (p=0.004). Significant differences were found in the count of embryos transferred and the percentage of women who underwent no embryo transfer (p=0.011). No substantial variations were detected in the gonadotropin doses, induction days, or progesterone levels among the two groups. The chemical and clinical pregnancy rates and completed cycles were equivalent between the two groups, with insignificant differences.
    Conclusion: CoQ10 promotes ovarian response to conventional induction and has a beneficial effect on ovarian reserve and embryological measures in poor responders. Despite this, additional investigations are essential to determine its influence on pregnancy rates.
    Clinical Trial ID: NCT06405204.
    Keywords:  Coenzyme Q10; infertility; intracytoplasmic sperm injection; oocytes retrieved; poor ovarian reserve
    DOI:  https://doi.org/10.2147/DDDT.S583321
  19. J Clin Endocrinol Metab. 2026 Mar 12. pii: dgag105. [Epub ahead of print]
       CONTEXT: While literature suggests women with diminished ovarian reserve may have increased metabolic risk, implications for long-term health are unknown.
    OBJECTIVE: To investigate the relationship between ovarian reserve markers at baseline with a subsequent measure of endothelial dysfunction, as a proxy for cardiovascular risk.
    DESIGN: Prospective cohort study.
    SETTING: Community-based setting.
    PATIENTS OR OTHER PARTICIPANTS: 322 subjects from the Ovarian Aging Study (OVA), an NIH-funded study of ovarian aging (average 35.4 years old at the time of baseline ovarian reserve measurements, and 45.1 years old at the time of endothelial dysfunction measurement).
    MAIN OUTCOMES MEASURE(S): This study investigated the association of ovarian reserve markers at baseline with a subsequent (average of 9.7 years) assessment of cardiovascular risk using the EndoPAT reactive hyperemia index (RHI) score of endothelial function. Secondary outcomes including the American Heart Association PREVENT score, metabolic syndrome, telomere length, and mitochondrial DNA were evaluated.
    RESULTS: RHI as a continuous outcome was significantly positively associated with both anti-Müllerian hormone (AMH) and antral follicle count (AFC) on fully adjusted models (AMH Coeff 0.052 95% CI 0.008 to 0.096, p = 0.02; AFC Coeff 0.017, 95% CI 0.001 to 0.032, p = 0.04). For secondary outcomes, the only result that was significant was the association of fully adjusted AFC with metabolic syndrome (OR 0.92, 95% CI 0.86-0.99, p = 0.02). A sensitivity analysis of the premenopausal cohort (N = 246) had similar findings.
    CONCLUSIONS: In this longitudinal cohort of women with normal ovarian aging, baseline ovarian reserve markers of AMH and AFC were positively associated with endothelial function as a continuous outcome. Baseline ovarian reserve markers were not related to most secondary outcomes of cellular aging and metabolic risk.
    Keywords:  anti-müllerian hormone; antral follicle count; cardiovascular health; endothelial function; ovarian aging; ovarian reserve
    DOI:  https://doi.org/10.1210/clinem/dgag105