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Related Experiment Video

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Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors

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Published on: March 7, 2017

Mutant PAX6 downregulates prohormone convertase 2 expression in mouse islets.

Yuanyuan Chen¹, Wenwan Cao, Shixin Zhou

¹Peking University Stem Cell Research Center, and Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.

Experimental Biology and Medicine (Maywood, N.J.)

|September 20, 2013

Summary

Paired box 6 (PAX6) mutations impact pancreatic function and glucose metabolism. This study reveals how truncated PAX6 regulates the Pc2 gene, crucial for proinsulin processing in the pancreas.

Keywords:

PAX6 Pc2 gene islets

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Area of Science:

Endocrinology
Developmental Biology
Molecular Genetics

Background:

Paired box 6 (PAX6) is vital for eye, CNS, and pancreas development.
PAX6 mutations link to diabetes and impaired glucose metabolism.
PAX6 regulates proinsulin processing via Pc1/3.

Purpose of the Study:

Investigate PAX6 regulation of prohormone convertase 2 (PC2) expression.
Examine the role of truncated PAX6 in pancreatic Pc2 gene regulation.

Main Methods:

Utilized Pax6 R266Stop mutant mice with C-terminal truncation.
Assessed Pc2 promoter activity using luciferase assays.
Analyzed mutant PAX6 protein stability and transcriptional effects.

Main Results:

Mutant PAX6 protein was found to be stable.
Truncated PAX6 demonstrated regulatory activity on the Pc2 promoter.
Wild-type PAX6 confirmed to have a transcriptional effect on Pc2.

Conclusions:

Truncated PAX6 can regulate downstream molecules, including Pc2.
Provides new insights into truncated PAX6 mechanisms in pancreatic and endocrine function.
Highlights PAX6's complex role in glucose homeostasis and pancreatic development.