Genome Editing of Lineage Determinants in Human Pluripotent Stem Cells Reveals Mechanisms of Pancreatic Development and Diabetes

Cell Stem Cell. 2016 Jun 2;18(6):755-768. doi: 10.1016/j.stem.2016.03.015. Epub 2016 Apr 28.

Abstract

Directed differentiation of human pluripotent stem cells (hPSCs) into somatic counterparts is a valuable tool for studying disease. However, examination of developmental mechanisms in hPSCs remains challenging given complex multi-factorial actions at different stages. Here, we used TALEN and CRISPR/Cas-mediated gene editing and hPSC-directed differentiation for a systematic analysis of the roles of eight pancreatic transcription factors (PDX1, RFX6, PTF1A, GLIS3, MNX1, NGN3, HES1, and ARX). Our analysis not only verified conserved gene requirements between mice and humans but also revealed a number of previously unsuspected developmental mechanisms with implications for type 2 diabetes. These include a role of RFX6 in regulating the number of pancreatic progenitors, a haploinsufficient requirement for PDX1 in pancreatic β cell differentiation, and a potentially divergent role of NGN3 in humans and mice. Our findings support use of systematic genome editing in hPSCs as a strategy for understanding mechanisms underlying congenital disorders.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Base Sequence
  • Basic Helix-Loop-Helix Transcription Factors / metabolism
  • CRISPR-Cas Systems / genetics
  • Cell Differentiation / drug effects
  • Cell Line
  • Cell Lineage / drug effects
  • Cell Lineage / genetics
  • Diabetes Mellitus / pathology*
  • Gene Editing*
  • Gene Knockout Techniques
  • Genome, Human*
  • Glucose / pharmacology
  • Haploinsufficiency / drug effects
  • Homeodomain Proteins / metabolism
  • Human Embryonic Stem Cells / cytology
  • Human Embryonic Stem Cells / drug effects
  • Human Embryonic Stem Cells / metabolism
  • Humans
  • Infant, Newborn
  • Insulin-Secreting Cells / drug effects
  • Insulin-Secreting Cells / metabolism
  • Insulin-Secreting Cells / pathology
  • Mutation / genetics
  • Nerve Tissue Proteins / metabolism
  • Pancreas / embryology*
  • Pancreas / pathology*
  • Phenotype
  • Pluripotent Stem Cells / cytology*
  • Pluripotent Stem Cells / drug effects
  • Pluripotent Stem Cells / metabolism
  • Regulatory Factor X Transcription Factors / metabolism
  • Time Factors
  • Trans-Activators / metabolism

Substances

  • Basic Helix-Loop-Helix Transcription Factors
  • Homeodomain Proteins
  • NEUROG3 protein, human
  • Nerve Tissue Proteins
  • Regulatory Factor X Transcription Factors
  • Rfx6 protein, human
  • Trans-Activators
  • pancreatic and duodenal homeobox 1 protein
  • Glucose