bims-orenst 2022-05-29 papers

bims-orenst

Biomed News

on Organs-on-chips and engineered stem cell models

Issue of 2022–05–29
ten papers selected by

The Effect of Dynamic, In Vivo-like Oxaliplatin on HCT116 Spheroids in a Cancer-on-Chip Model Is Representative of the Response in Xenografts.
Combining Human Organoids and Organ-on-a-Chip Technology to Model Intestinal Region-Specific Functionality.
Aneurysm-on-a-Chip: Setting Flow Parameters for Microfluidic Endothelial Cultures Based on Computational Fluid Dynamics Modeling of Intracranial Aneurysms.
A Real-Time Sensing System for Monitoring Neural Network Degeneration in an Alzheimer's Disease-on-a-Chip Model.
Immunoresponsive microbiota-gut-on-chip reproduces barrier dysfunction, stromal reshaping and probiotics translocation under inflammation.
Three-Dimensional Kidney-on-a-Chip Assessment of Contrast-Induced Kidney Injury: Osmolality and Viscosity.
Analyzing Human Periodontal Soft Tissue Inflammation and Drug Responses In Vitro Using Epithelium-Capillary Interface On-a-Chip.
Fusing spheroids to aligned μ-tissues in a heart-on-chip featuring oxygen sensing and electrical pacing capabilities.
Human iPSC-derived brain endothelial microvessels in a multi-well format enable permeability screens of anti-inflammatory drugs.
Investigation of the Therapeutic Potential of New Antidiabetic Compounds Using Islet-on-a-Chip Microfluidic Model.

Micromachines (Basel). 2022 May 06. pii: 739. [Epub ahead of print]13(5):

The Effect of Dynamic, In Vivo-like Oxaliplatin on HCT116 Spheroids in a Cancer-on-Chip Model Is Representative of the Response in Xenografts.

Job Komen, Sanne M van Neerven, Elsbeth G B M Bossink, Nina E de Groot, Lisanne E Nijman, Albert van den Berg, Louis Vermeulen, Andries D van der Meer.

  The cancer xenograft model in which human cancer cells are implanted in a mouse is one of the most used preclinical models to test the efficacy of novel cancer drugs. However, the model is imperfect; animal models are ethically burdened, and the imperfect efficacy predictions contribute to high clinical attrition of novel drugs. If microfluidic cancer-on-chip models could recapitulate key elements of the xenograft model, then these models could substitute the xenograft model and subsequently surpass the xenograft model by reducing variation, increasing sensitivity and scale, and adding human factors. Here, we exposed HCT116 colorectal cancer spheroids to dynamic, in vivo-like, concentrations of oxaliplatin, including a 5 day drug-free period, on-chip. Growth inhibition on-chip was comparable to existing xenograft studies. Furthermore, immunohistochemistry showed a similar response in proliferation and apoptosis markers. While small volume changes in xenografts are hard to detect, in the chip-system, we could observe a temporary growth delay. Lastly, histopathology and a pharmacodynamic model showed that the cancer spheroid-on-chip was representative of the proliferating outer part of a HCT116 xenograft, thereby capturing the major driver of the drug response of the xenograft. Hence, the cancer-on-chip model recapitulated the response of HCT116 xenografts to oxaliplatin and provided additional drug efficacy information.

Keywords:  cancer-on-chip; colorectal cancer; drug efficacy; microfluidic; oxaliplatin; pharmacodynamics; pharmacokinetics; xenograft

DOI:  https://doi.org/10.3390/mi13050739
J Vis Exp. 2022 May 05.

Combining Human Organoids and Organ-on-a-Chip Technology to Model Intestinal Region-Specific Functionality.

Gauri Kulkarni, Athanasia Apostolou, Lorna Ewart, Carolina Lucchesi, Magdalena Kasendra.

The intestinal mucosa is a complex physical and biochemical barrier that fulfills a myriad of important functions. It enables the transport, absorption, and metabolism of nutrients and xenobiotics while facilitating a symbiotic relationship with microbiota and restricting the invasion of microorganisms. Functional interaction between various cell types and their physical and biochemical environment is vital to establish and maintain intestinal tissue homeostasis. Modeling these complex interactions and integrated intestinal physiology in vitro is a formidable goal with the potential to transform the way new therapeutic targets and drug candidates are discovered and developed. Organoids and Organ-on-a-Chip technologies have recently been combined to generate human-relevant intestine chips suitable for studying the functional aspects of intestinal physiology and pathophysiology in vitro. Organoids derived from the biopsies of the small (duodenum) and large intestine are seeded into the top compartment of an organ chip and then successfully expand as monolayers while preserving the distinct cellular, molecular, and functional features of each intestinal region. Human intestine tissue-specific microvascular endothelial cells are incorporated in the bottom compartment of the organ chip to recreate the epithelial-endothelial interface. This novel platform facilitates luminal exposure to nutrients, drugs, and microorganisms, enabling studies of intestinal transport, permeability, and host-microbe interactions. Here, a detailed protocol is provided for the establishment of intestine chips representing the human duodenum (duodenum chip) and colon (colon chip), and their subsequent culture under continuous flow and peristalsis-like deformations. We demonstrate methods for assessing drug metabolism and CYP3A4 induction in duodenum chip using prototypical inducers and substrates. Lastly, we provide a step-by-step procedure for the in vitro modeling of interferon gamma (IFNγ)-mediated barrier disruption (leaky gut syndrome) in a colon chip, including methods for evaluating the alteration of paracellular permeability, changes in cytokine secretion, and transcriptomic profiling of the cells within the chip.

DOI: https://doi.org/10.3791/63724
Brain Sci. 2022 May 05. pii: 603. [Epub ahead of print]12(5):

Aneurysm-on-a-Chip: Setting Flow Parameters for Microfluidic Endothelial Cultures Based on Computational Fluid Dynamics Modeling of Intracranial Aneurysms.

Aisen Vivas, Julia Mikhal, Gabriela M Ong, Anna Eigenbrodt, Andries D van der Meer, Rene Aquarius, Bernard J Geurts, Hieronymus D Boogaarts.

  Intracranial aneurysms are pouch-like extrusions from the vessels at the base of the brain which can rupture and cause a subarachnoid hemorrhage. The pathophysiological mechanism of aneurysm formation is thought to be a consequence of blood flow (hemodynamic) induced changes on the endothelium. In this study, the results of a personalized aneurysm-on-a-chip model using patient-specific flow parameters and patient-specific cells are presented. CT imaging was used to calculate CFD parameters using an immersed boundary method. A microfluidic device either cultured with human umbilical vein endothelial cells (HUVECs) or human induced pluripotent stem cell-derived endothelial cells (hiPSC-EC) was used. Both types of endothelial cells were exposed for 24 h to either 0.03 Pa or 1.5 Pa shear stress, corresponding to regions of low shear and high shear in the computational aneurysm model, respectively. As a control, both cell types were also cultured under static conditions for 24 h as a control. Both HUVEC and hiPSC-EC cultures presented as confluent monolayers with no particular cell alignment in static or low shear conditions. Under high shear conditions HUVEC elongated and aligned in the direction of the flow. HiPSC-EC exhibited reduced cell numbers, monolayer gap formation and cells with aberrant, spread-out morphology. Future research should focus on hiPSC-EC stabilization to allow personalized intracranial aneurysm models.

Keywords:  aneurysm; aneurysm on a chip; computational fluid dynamics; endothelial cells; intracranial aneurysm; organ on a chip

DOI:  https://doi.org/10.3390/brainsci12050603
Pharmaceutics. 2022 May 09. pii: 1022. [Epub ahead of print]14(5):

A Real-Time Sensing System for Monitoring Neural Network Degeneration in an Alzheimer's Disease-on-a-Chip Model.

Nien-Che Liu, Chu-Chun Liang, Yi-Chen Ethan Li, I-Chi Lee.

  Stem cell-based in vitro models may provide potential therapeutic strategies and allow drug screening for neurodegenerative diseases, including Alzheimer's disease (AD). Herein, we develop a neural stem cell (NSC) spheroid-based biochip that is characterized by a brain-like structure, well-defined neural differentiation, and neural network formation, representing a brain-on-a-chip. This system consisted of microelectrode arrays with a multichannel platform and allowed the real-time monitoring of network formation and degeneration by impedance analysis. The parameters of this platform for the real-time tracking of network development and organization were established based on our previous study. Subsequently, β-amyloid (Aβ) was added into the brain-on-a-chip system to generate an AD-on-a-chip model, and toxic effects on neurons and the degeneration of synapses were observed. The AD-on-a-chip model may help us to investigate the neurotoxicity of Aβ on neurons and neural networks in real time. Aβ causes neural damage and accumulates around neurites or inside neurospheroids, as observed by immunostaining and scanning electron microscopy (SEM). After incubation with Aβ, reactive oxygen species (ROS) increased, synapse function decreased, and the neurotransmitter-acetylcholine (ACh) concentration decreased were observed. Most importantly, the real-time analysis system monitored the impedance value variation in the system with Aβ incubation, providing consecutive network disconnection data that are consistent with biological data. This platform provides simple, real-time, and convenient sensing to monitor the network microenvironment. The proposed AD-on-a-chip model enhances the understanding of neurological pathology, and the development of this model provides an alternative for the study of drug discovery and cell-protein interactions in the brain.

Keywords:  Alzheimer’s disease-on-a-chip model; biochip; neural network formation; neural stem cells (NSCs); real-time impedance analysis; β-amyloid (Aβ)

DOI:  https://doi.org/10.3390/pharmaceutics14051022
Biomaterials. 2022 May 17. pii: S0142-9612(22)00213-7. [Epub ahead of print]286 121573

Immunoresponsive microbiota-gut-on-chip reproduces barrier dysfunction, stromal reshaping and probiotics translocation under inflammation.

Vincenza De Gregorio, Cinzia Sgambato, Francesco Urciuolo, Raffaele Vecchione, Paolo Antonio Netti, Giorgia Imparato.

  Here, we propose an immune-responsive human Microbiota-Intestine axis on-chip as a platform able to reproduce the architecture and vertical topography of the microbiota with a complex extracellular microenvironment consisting of a responsive extra cellular matrix (ECM) and a plethora of immune-modulatory mediators released from different cell populations such as epithelial, stromal, blood and microbial species in homeostatic and inflamed conditions. Firstly, we developed a three-dimensional human intestine model (3D-hI), represented by an instructive and histologically competent ECM and a well-differentiated epithelium with mucus-covered microvilli. Then, we replicated the microenvironmental anaerobic condition of human intestinal lumen by fabricating a custom-made microbiota chamber (MC) on the apical side of the Microbiota-human Intestine on chip (MihI-oC), establishing the physiological oxygen gradient occurring along the thickness of human small intestine from the serosal to the luminal side. The complexity of the intestinal extracellular microenvironment was improved by integrating cells populations that are directly involved in the inflammatory response such as peripheral blood mononuclear cells (PBMCs) and two species of the intestinal commensal microbiota (Lactobacillus rhamnosus and Bifidobacterium longum). We found that lipopolysaccharide (LPS)-induced inflammation elicits microbiota's geographical change and induce Bifidobacterium longum iper-proliferation, highlighting a role of such probiotic in anti-inflammatory process. Moreover, we proved, for the first time, the indirect role of the microbiota on stromal reshaping in immune-responsive MihI-oC in terms of collagen fibers orientation and ECM remodeling, and demonstrated the role of microbiota in alleviating gastrointestinal, immunological and infectious diseases by analyzing the release of key immune-mediators after inflammatory stimulus (reactive oxygen species (ROS), pro- and anti-inflammatory cytokines).

Keywords:  Extracellular microenvironment; Human microbiota-intestine axis on chip; Inflammatory bowel disease; Intestinal microbiota; Mucosal immunity; Oxygen gradient

DOI:  https://doi.org/10.1016/j.biomaterials.2022.121573
Micromachines (Basel). 2022 Apr 28. pii: 688. [Epub ahead of print]13(5):

Three-Dimensional Kidney-on-a-Chip Assessment of Contrast-Induced Kidney Injury: Osmolality and Viscosity.

Kipyo Kim, Beomgyun Jeong, Yun-Mi Lee, Hyung-Eun Son, Ji-Young Ryu, Seokwoo Park, Jong Cheol Jeong, Ho Jun Chin, Sejoong Kim.

  Increased viscosity of concentrated contrast media (CM) in the renal tubules can perturb renal hemodynamics and have a detrimental effect on tubular epithelial cells. However, the effects of viscosity on contrast-induced nephropathy (CIN) remain poorly understood. Conventional in vitro culture studies do not reflect the rheological properties of CM. Therefore, we investigated the effects of CM viscosity on renal tubules using a kidney-on-a-chip and two different types of CM. Renal proximal tubule epithelial cells (RPTEC) were cultured in a three-dimensional microfluidic culture platform under bidirectional fluid shear stress. We treated the RPTEC with two types of CM: low- (LOCM, iopromide) and iso-osmolar contrast media (IOCM, iodixanol). Renal tubular cell injury induced by LOCM and IOCM was examined under different iodine concentrations (50-250 mgI/mL) and shear-stress conditions. LOCM showed a significant dose-dependent cytotoxic effect, which was significantly higher than that of IOCM under static and low-to-moderate shear stress conditions. However, high shear-stress resulted in reduced cell viability in IOCM; no difference between IOCM and LOCM was found under high shear-stress conditions. The cytotoxic effects were pronounced at a mean shear stress of 1 dyn/cm2 or higher. The high viscosity of IOCM slowed the fluid flow rate and augmented fluid shear-stress. We suggest an alternative in vitro model of CIN using the three-dimensional kidney-on-a-chip. Our results indicate a vital role of viscosity-induced nephrotoxicity under high shear-stress conditions, contrary to the findings of conventional in vitro studies.

Keywords:  acute kidney injury; contrast media; contrast-induced nephropathy; kidney-on-a-chip

DOI:  https://doi.org/10.3390/mi13050688
Biosensors (Basel). 2022 May 18. pii: 345. [Epub ahead of print]12(5):

Analyzing Human Periodontal Soft Tissue Inflammation and Drug Responses In Vitro Using Epithelium-Capillary Interface On-a-Chip.

Laidi Jin, Ni Kou, Fan An, Zehang Gao, Tian Tian, Jianan Hui, Chen Chen, Guowu Ma, Hongju Mao, Huiying Liu.

  The gingival epithelium-capillary interface is a unique feature of periodontal soft tissue, preserving periodontal tissue homeostasis and preventing microorganism and toxic substances from entering the subepithelial tissue. However, the function of the interface is disturbed in periodontitis, and mechanisms of the breakdown of the interface are incompletely understood. To address these limitations, we developed a microfluidic epithelium-capillary barrier with a thin culture membrane (10 μm) that closely mimics the in vivo gingival epithelial barrier with an immune micro-environment. To test the validity of the fabricated gingival epithelial barrier model, epithelium-capillary interface-on-a-chip was cultured with human gingival epithelial cells (HGECs) and human vascular endothelial cells (HUVEC). Their key properties were tested using optical microscope, transepithelial/transendothelial electrical resistance (TEER), and permeability assays. The clear expression of VE-cadherin revealed the tight junctions in endothelial cells. Live/dead assays indicated a high cell viability, and the astrocytic morphology of HGE cells was confirmed by F-actin immunostaining. By the third day of cell culture, TEER levels typically exceeded in co-cultures. The resultant permeability coefficients showed a significant difference between 70 kDa and 40 kDa FITC-dextran. The expression of protein intercellular cell adhesion molecule (ICAM-1) and human beta defensin-2 (HBD2) decreased when exposed to TNF-α and LPS, but recovered with the NF-κB inhibitor treatment- Pyrrolidinedithiocarbamic acid (PDTC), indicating the stability of the fabricated chip. These results demonstrate that the developed epithelium-capillary interface system is a valid model for studying periodontal soft tissue function and drug delivery.

Keywords:  epithelium–capillary interface-on-a-chip; inflammation; periodontal soft tissue

DOI:  https://doi.org/10.3390/bios12050345
Mater Today Bio. 2022 Jun;15 100280

Fusing spheroids to aligned μ-tissues in a heart-on-chip featuring oxygen sensing and electrical pacing capabilities.

Oliver Schneider, Alessia Moruzzi, Stefanie Fuchs, Alina Grobel, Henrike S Schulze, Torsten Mayr, Peter Loskill.

  Over the last decade, Organ-on-Chip (OoC) emerged as a promising technology for advanced in vitro models, recapitulating key physiological cues. OoC approaches tailored for cardiac tissue engineering resulted in a variety of platforms, some of which integrate stimulation or probing capabilities. Due to manual handling processes, however, a large-scale standardized and robust tissue generation, applicable in an industrial setting, is still out of reach. Here, we present a novel cell injection and tissue generation concept relying on spheroids, which can be produced in large quantities and uniform size from induced pluripotent stem cell-derived human cardiomyocytes. Hydrostatic flow transports and accumulates spheroids in dogbone-shaped tissue chambers, which subsequently fuse and form aligned, contracting cardiac muscle fibers. Furthermore, we demonstrate electrical stimulation capabilities by utilizing fluidic media connectors as electrodes and provide the blueprint of a low-cost, open-source, scriptable pulse generator. We report on a novel integration strategy of optical O2 sensor spots into resin-based microfluidic systems, enabling in situ determination of O2 partial pressures. Finally, a proof-of-concept demonstrating electrical stimulation combined with in situ monitoring of metabolic activity in cardiac tissues is provided. The developed system thus opens the door for advanced OoCs integrating biophysical stimulation as well as probing capabilities and serves as a blueprint for the facile and robust generation of high density microtissues in microfluidic modules amenable to scaling-up and automation.

Keywords:  CMs, Cardiomyocytes; Electrical stimulation; HoC, Heart-on-Chip; Metabolism; Microphysiological systems; Noninvasive readouts; OoC, Organ-on-Chip; Optical sensors; Organ-on-Chip; hiPSCs, human induced pluripotent stem cells

DOI:  https://doi.org/10.1016/j.mtbio.2022.100280
Biomaterials. 2022 Apr 30. pii: S0142-9612(22)00165-X. [Epub ahead of print] 121525

Human iPSC-derived brain endothelial microvessels in a multi-well format enable permeability screens of anti-inflammatory drugs.

Sven Fengler, Birgit Kurkowsky, Sanjeev Kumar Kaushalya, Wera Roth, Eugenio Fava, Philip Denner.

  Optimizing drug candidates for blood-brain barrier (BBB) penetration remains one of the key challenges in drug discovery to finally target brain disorders including neurodegenerative diseases which do not have adequate treatments so far. It has been difficult to establish state-of-the-art stem cell derived in vitro models that mimic physiological barrier properties including a 3D microvasculature in a format that is scalable to screen drugs for BBB penetration. To address this challenge, we established human induced pluripotent stem cell (iPSC)-derived brain endothelial microvessels in a standardized and scalable multi-well plate format. iPSC-derived brain microvascular endothelial cells (BMECs) were supplemented with primary cell conditioned media and grew to microvessels in 10 days. Produced microvessels show typical BBB endothelial protein expression, tight-junctions and polarized localization of efflux transporter. Microvessels exhibited physiological relevant trans-endothelial electrical resistance (TEER), were leak-tight for 10 kDa dextran-Alexa 647 and strongly limited the permeability of sodium fluorescein (NaF). Permeability tests with reference compounds confirmed the suitability of our model as platform to identify potential BBB penetrating anti-inflammatory drugs. The here presented platform recapitulates physiological properties and allows rapid screening of BBB permeable anti-inflammatory compounds that has been suggested as promising substances to cure so far untreatable neurodegenerative diseases.

Keywords:  3D microvessel; Blood-brain barrier chip; Conditioned medium; Drug permeability; High-content microfluidic; Induced pluripotent stem cells

DOI:  https://doi.org/10.1016/j.biomaterials.2022.121525
Biosensors (Basel). 2022 May 05. pii: 302. [Epub ahead of print]12(5):

Investigation of the Therapeutic Potential of New Antidiabetic Compounds Using Islet-on-a-Chip Microfluidic Model.

Patrycja Sokolowska, Elzbieta Jastrzebska, Agnieszka Dobrzyn, Zbigniew Brzozka.

  Nowadays, diabetes mellitus is one of the most common chronic diseases in the world. Current research on the treatment of diabetes combines many fields of science, such as biotechnology, transplantology or engineering. Therefore, it is necessary to develop new therapeutic strategies and preventive methods. A newly discovered class of lipids-Palmitic Acid Hydroxy Stearic Acid (PAHSA) has recently been proposed as an agent with potential therapeutic properties. In this research, we used an islet-on-a-chip microfluidic 3D model of pancreatic islets (pseudoislets) to study two isomers of PAHSA: 5-PAHSA and 9-PAHSA as potential regulators of proliferation, viability, insulin and glucagon expression, and glucose-stimulated insulin and glucagon secretion. Due to the use of the Lab-on-a-chip systems and flow conditions, we were able to reflect conditions similar to in vivo. In addition, we significantly shortened the time of pseudoislet production, and we were able to carry out cell culture, microscopic analysis and measurements using a multi-well plate reader at the same time on one device. In this report we showed that under microfluidic conditions PAHSA, especially 5-PAHSA, has a positive effect on pseudoislet proliferation, increase in cell number and mass, and glucose-stimulated insulin secretion, which may qualify it as a compound with potential therapeutic properties.

Keywords:  5-PAHSA; 9-PAHSA; GSIS; Lab-on-a-chip model; fatty acid; glucagon secretion; glucose stimulated insulin secretion; islet-on-a-chip model; therapeutic agent

DOI:  https://doi.org/10.3390/bios12050302