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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 PDFRetinoid signaling in pancreas development, islet function, and disease.
Curr Top Dev Biol
January 2025
University of Michigan, Department of Pharmacology, Caswell Diabetes Institute, Ann Arbor, MI, United States. Electronic address:
All-trans retinoic acid (ATRA) signaling is essential in numerous different biological contexts. This review highlights the diverse roles of ATRA during development, function, and diseases of the pancreas. ATRA is essential to specify pancreatic progenitors from gut tube endoderm, endocrine and exocrine differentiation, and adult islet function.
View Article and Find Full Text PDFOxygenation and function of endocrine bioartificial pancreatic tissue constructs under flow for preclinical optimization.
J Tissue Eng
January 2025
Department of Chemical Engineering, McGill University, Montreal, QC, Canada.
Islet transplantation and more recently stem cell-derived islets were shown to successfully re-establish glycemic control in people with type 1 diabetes under immunosuppression. These results were achieved through intraportal infusion which leads to early graft losses and limits the capacity to contain and retrieve implanted cells in case of adverse events. Extra-hepatic sites and encapsulation devices have been developed to address these challenges and potentially create an immunoprotective or immune-privileged environment.
View Article and Find Full Text PDFIslet NO-Synthases, extracellular NO and glucose-stimulated insulin secretion: Possible impact of neuronal NO-Synthase on the pentose phosphate pathway.
PLoS One
January 2025
Department of Clinical Science, SUS, Division of Islet Cell Physiology, University of Lund, Malmö, Sweden.
The impact of islet neuronal nitric oxide synthase (nNOS) on glucose-stimulated insulin secretion (GSIS) is less understood. We investigated this issue by performing simultaneous measurements of the activity of nNOS versus inducible NOS (iNOS) in GSIS using isolated murine islets. Additionally, the significance of extracellular NO on GSIS was studied.
View Article and Find Full Text PDFDECORIN, a triceps-derived myokine, protects sorted β-cells and human islets against chronic inflammation associated with type 2 diabetes.
Acta Physiol (Oxf)
February 2025
UR Diabète et Thérapeutiques, Centre européen d'étude du Diabète, Université de Strasbourg, Strasbourg, France.
Aim: Pancreatic β-cells are susceptible to inflammation, leading to decreased insulin production/secretion and cell death. Previously, we have identified a novel triceps-derived myokine, DECORIN, which plays a pivotal role in skeletal muscle-to-pancreas interorgan communication. However, whether DECORIN can directly impact β-cell function and susceptibility to inflammation remains unexplored.
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