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Establishment of subcutaneous transplantation platform for delivering induced pluripotent stem cell-derived insulin-producing cells.
PLoS One
January 2025
Faculty of Veterinary Science, Veterinary Clinical Stem Cell and Bioengineering Research Unit, Chulalongkorn University, Bangkok, Thailand.
Potential trend of regenerative treatment for type I diabetes has been introduced for more than a decade. However, the technologies regarding insulin-producing cell (IPC) production and transplantation are still being developed. Here, we propose the potential IPC production protocol employing mouse gingival fibroblast-derived induced pluripotent stem cells (mGF-iPSCs) as a resource and the pre-clinical approved subcutaneous IPC transplantation platform for further clinical confirmation study.
View Article and Find Full Text PDFTherapeutic gene correction of HBB frameshift CD41-42 (-TCTT) deletion in human hematopoietic stem cells.
Adv Biotechnol (Singap)
January 2025
MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, Guangdong, China.
Β-thalassemia is one of the global health burdens. The CD41-42 (-TCTT) mutation at HBB is the most prevalent pathogenic mutation of β-thalassemia in both China and Southeast Asia. Previous studies focused on repairing the HBB CD41-42 (-TCTT) mutation in β-thalassemia patient-specific induced pluripotent stem cells, which were subsequently differentiated into hematopoietic stem and progenitor cells (HSPCs) for transplantation.
View Article and Find Full Text PDFEpigenetic memory as crucial contributing factor in directing the differentiation of human iPSC into pancreatic β-cells in vitro.
Cell Tissue Res
January 2025
Diabetes Research Center, Qatar Biomedical Research Institute (QBRI), Qatar Foundation (QF), Hamad Bin Khalifa University (HBKU), Doha, Qatar.
Impaired insulin secretion contributes to the pathogenesis of type 1 diabetes mellitus through autoimmune destruction of pancreatic β-cells and the pathogenesis of severe forms of type 2 diabetes mellitus through β-cell dedifferentiation and other mechanisms. Replenishment of malfunctioning β-cells via islet transplantation has the potential to induce long-term glycemic control in the body. However, this treatment option cannot widely be implemented in clinical due to healthy islet donor shortage.
View Article and Find Full Text PDFShorter Digestion Times of Donor Islets Is Associated With Better Islet Graft Function After Islet Transplantation.
Cell Transplant
January 2025
Department of Translational Research & Cellular Therapeutics, Arthur Riggs Diabetes & Metabolism Research Institute, City of Hope, Duarte, CA, USA.
Although islet transplantation is effective in reducing severe hypoglycemia events and controlling blood glucose in patients with type 1 diabetes, maintaining islet graft function long-term is a significant challenge. Islets from multiple donors are often needed to achieve insulin independence, and even then, islet function can decline over time when metabolic demand exceeds islet mass/insulin secretory capacity. We previously developed a method that calculated the islet graft function index (GFI) and a patient's predicted insulin requirement (PIR) using mathematical nonlinear regression.
View Article and Find Full Text PDFHigh-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.
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