ENTPD3 Marks Mature Stem Cell-Derived β-Cells Formed by Self-Aggregation In Vitro

Area of Science:

• Endocrinology
• Stem Cell Biology
• Regenerative Medicine

Background:

• Stem cell-derived beta-like cells (sBC) offer potential for diabetes cell replacement therapy.
• Clinical application requires sBC to achieve functional maturity comparable to adult beta-cells.
• The process of human beta-cell maturation in vitro is not fully understood.

Purpose of the Study:

• To investigate spontaneous maturation events in stem cell-derived beta-like cells (sBC) in vitro.
• To identify markers for functionally mature sBC.
• To provide insights for developing mature sBC for diabetes therapy.

Main Methods:

• In vitro culture of sBC without exogenous maturation factors.
• Observation of self-enrichment into islet-like structures.
• Functional assays and surface protein analysis (ENTPD3/NDPTase3) to assess maturation.

Main Results:

• sBC spontaneously self-organized into islet-like cap structures in vitro.
• Self-enriched sBC (seBC) exhibited functional maturation.
• Distinct subpopulations with varying maturation levels were present within seBC.
• The surface protein ENTPD3 was identified as a specific marker for the most mature seBC population.

Conclusions:

• Spontaneous in vitro self-organization promotes functional maturation of sBC.
• ENTPD3 is a valuable marker for identifying and sorting mature sBC.
• These findings advance the development of functionally mature sBC for diabetes cell replacement therapy.