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High-Yield Generation of Glucose-Responsive Pseudoislets From Murine Insulinoma Cells for Studies and Longitudinal Monitoring of Graft Survival .
Cell Transplant
January 2025
Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
Compared to primary pancreatic islets, insulinoma cell-derived 3D pseudoislets offer a more accessible, consistent, renewable, and widely applicable model system for optimization and mechanistic studies in type 1 diabetes (T1D). Here, we report a simple and efficient method for generating 3D pseudoislets from MIN6 and NIT-1 murine insulinoma cells. These pseudoislets are homogeneous in size and morphology (~150 µm), exhibit functional glucose-stimulated insulin secretion (GSIS) up to 18 days (NIT-1) enabling long-term studies, are produced in high yield [>35,000 Islet Equivalence from 30 ml culture], and are suitable for both and studies, including for encapsulation studies.
View Article and Find Full Text PDFIncreasing robustness of assay for immnosuppressive effect of mesenchymal stromal/stem cells: The role of inflammatory cytokine production by peripheral blood mononuclear cells.
Regen Ther
March 2025
Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki Ward, Kawasaki City, Kanagawa, 210-9501, Japan.
Introduction: The Quality by Design (QbD) approach for developing cell therapy products using mesenchymal stromal/stem cells (MSCs) is a promising method for designing manufacturing processes to improve the quality of MSC products. It is crucial to ensure the reproducibility and robustness of the test system for evaluating critical quality attributes (CQAs) in the QbD approach for manufacturing of pharmaceutical products. In this study, we explored the key factors involved in establishing a robust evaluation system for the immunosuppressive effect of MSCs, which can be an example of a CQA in developing and manufacturing therapeutic MSCs for treating graft-versus-host disease, , and we have identified method attributes to increase the robustness of a simple assay to assess the immunosuppressive effects of MSCs.
View Article and Find Full Text PDFEmbryonic Stem Cell Differentiation to Definitive Endoderm As a Model of Heterogeneity Onset During Germ Layer Specification.
Acta Naturae
January 2024
Pluripotency Dynamics Group, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, 194064 Russian Federation.
Embryonic stem cells (ESCs) hold great promise for regenerative medicine thanks to their ability to self-renew and differentiate into somatic cells and the germline. ESCs correspond to pluripotent epiblast - the tissue from which the following three germ layers originate during embryonic gastrulation: the ectoderm, mesoderm, and endoderm. Importantly, ESCs can be induced to differentiate toward various cell types by varying culture conditions, which can be exploited for modeling of developmental processes such as gastrulation.
View Article and Find Full Text PDFEfficacy of an Autologous Dermal Fibroblast Injection in Reducing the Retear Rate After Arthroscopic Rotator Cuff Repair: A Prospective Randomized Controlled Trial.
Am J Sports Med
January 2025
Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea.
Background: Interest in biological augmentation for improving bone-tendon interface (BTI) healing after arthroscopic rotator cuff repair (ARCR) is growing. Dermal fibroblasts, known for collagen synthesis similar to tenocytes, have shown effectiveness in BTI healing in chronic rotator cuff tear (RCT) models in rabbits. However, no human clinical trials have been conducted.
View Article and Find Full Text PDFEnhanced intestinal epithelial co-culture model with orbital mechanical stimulation: a proof-of-concept application in food nanotoxicology.
Front Mol Biosci
January 2025
Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Cesena, Italy.
Introduction: Current intestinal models lack the mechanical forces present in the physiological environment, limiting their reliability for nanotoxicology studies. Here, we developed an enhanced Caco-2/HT29-MTX-E12 co-culture model incorporating orbital mechanical stimulation to better replicate intestinal conditions and investigate nanoparticle interactions.
Methods: We established co-cultures under static and dynamic conditions, evaluating their development through multiple approaches including barrier integrity measurements, gene expression analysis, and confocal microscopy.
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