Age-Dependent Pancreatic Gene Regulation Reveals Mechanisms Governing Human β Cell Function

Area of Science:

• Endocrinology
• Genomics
• Developmental Biology

Background:

• Understanding human pancreatic islet cell regulation is crucial for diabetes therapy development.
• Age-dependent changes in islet cell growth and function after birth are not well-established in humans.

Purpose of the Study:

• To identify age-dependent gene expression and chromatin changes in human pancreatic endocrine and exocrine cells.
• To uncover regulators of human islet cell maturation and function.

Main Methods:

• A multimodal strategy was employed to isolate pancreatic endocrine and exocrine cells from children and adults.
• Genomic-scale analysis identified age-dependent gene expression and histone modification patterns.

Main Results:

• Distinct proliferative and functional states were observed in islet alpha and beta cells.
• Expression of SIX2 and SIX3 increased with age specifically in human islet beta cells.
• SIX2 and SIX3 were found to enhance insulin content and secretion in immature beta cells.

Conclusions:

• SIX2 and SIX3 are novel regulators of human islet beta cell maturation and function.
• This study provides a valuable resource for investigating human-specific islet cell biology.
• Findings may inform the development of novel diabetes treatments.