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Pancreatic Islet Embedding for Paraffin Sections
Published on: June 29, 2018
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Multi-omics analysis of long-term cultured human islets
Guihua Sun1, Meirigeng Qi2, Olivia Sun3
1Department of Neurodegenerative Diseases, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA.
Biorxiv : the Preprint Server for Biology
|January 7, 2025
Summary
Long-term culture of human islets reveals cellular changes and potential transdifferentiation. These findings offer insights into pancreatic cell survival mechanisms under stress, crucial for islet transplantation success.
Area of Science:
- Endocrinology
- Cell Biology
- Regenerative Medicine
Background:
- Beta-cell dysfunction is the primary driver of diabetes progression.
- Islet transplantation is a promising therapeutic strategy for diabetes.
- Understanding cellular changes in transplanted islets post-isolation is critical.
Purpose of the Study:
- To characterize human islets after long-term in vitro culture (LTC).
- To investigate molecular and cellular alterations in surviving islets.
- To explore mechanisms governing pancreatic cell survival and maturity.
Main Methods:
- Human islets were subjected to long-term in vitro culture (LTC).
- Gene expression (mRNA, miRNA) and cell populations were analyzed.
- Cellular characteristics, including maturity markers, were assessed.
Main Results:
- Most genes were downregulated, but specific mRNA/miRNA pathways were upregulated during LTC.
- Alpha-cells and beta-cells showed elevated MAFB and MAFA gene expression, respectively.
- Exocrine cells were eliminated faster than endocrine cells; beta-cells were lost more rapidly than alpha-cells.
- A population of immature-like alpha and beta cells enriched, suggesting possible transdifferentiation or dedifferentiation.
Conclusions:
- Pancreatic cells possess intrinsic mechanisms related to maturity and survival under stress.
- LTC induces significant cellular and molecular changes in human islets.
- Findings provide insights into the behavior of islets in vitro, relevant for transplantation research.
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