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Related Experiment Video

Updated: Jul 4, 2026

Pancreatic Islet Embedding for Paraffin Sections
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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
PubMed
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.

Keywords:
bulk RNA sequencingisletislet cultureislet tranplantationmiRNApancreassingle cell RNA sequencing

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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.