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Updated: May 12, 2026

Immunomagnetic Separation of Fat Depot-specific Sca1high Adipose-derived Stem Cells ASCs

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Published on: August 11, 2016

Controlling Human Stem Cell-Derived Islet Composition Using Magnetic Sorting.

Allison B Kelley¹, Mira Shunkarova¹, Marlie M Maestas^1,2

¹Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, Missouri, USA.

Biotechnology and Bioengineering

|May 22, 2025

Summary

This summary is machine-generated.

Magnetic sorting enriches stem cell-derived islets (SC-islets) for functional beta cells using CD49a. This improves insulin secretion and beta cell identity, enhancing potential for type 1 diabetes (T1D) cell therapy.

Keywords:

diabetes differentiation islets magnetic sorting pancreas stem cells

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Area of Science:

Regenerative Medicine
Endocrinology
Cell Biology

Background:

Stem cell-derived islets (SC-islets) are a potential therapy for type 1 diabetes (T1D).
Current SC-islet generation lacks control over cell type composition, leading to off-target cells.
Improving beta cell proportion and function in SC-islets is crucial for therapeutic efficacy.

Purpose of the Study:

To develop a method for enriching SC-islets for functional beta cells.
To assess the impact of CD49a enrichment on SC-islet composition and function.
To evaluate the therapeutic potential of CD49a-enriched SC-islets in a T1D model.

Main Methods:

Generated SC-islets from human pluripotent stem cells using adherent differentiation.
Utilized magnetic-activated cell sorting (MACS) to isolate CD49a-positive and CD49a-negative SC-islets.
Characterized cell composition using single-cell RNA sequencing (scRNA-seq) and immunostaining.
Assessed glucose-stimulated insulin secretion (GSIS) in vitro and in vivo after transplantation into diabetic mice.

Main Results:

CD49a-enriched SC-islets showed a higher proportion of functional beta cells and improved transcriptional identity.
Enriched SC-islets exhibited enhanced glucose-stimulated insulin secretion in vitro.
Transplantation of CD49a-enriched SC-islets into diabetic mice resulted in improved glycemic control and insulin secretion.

Conclusions:

CD49a serves as a reliable marker for enriching functional beta cells within SC-islets.
CD49a-based sorting significantly enhances the beta cell identity and therapeutic function of SC-islets.
This enrichment strategy represents a promising advancement for type 1 diabetes cell replacement therapies.