The mechanisms that restrict regeneration and maintain cell identity following injury are poorly characterized in higher vertebrates. Following β-cell loss, 1-2% of the glucagon-producing α-cells spontaneously engage in insulin production in mice. Here we explore the mechanisms inhibiting α-cell plasticity.…
Category: Research Networks
Collaboration Paper: Converting Adult Pancreatic Islet α Cells into β Cells by Dnmt1-Arx

Chakravarthy et al. dissect the mechanisms maintaining α cell identity and reveal that simultaneous inactivation of the DNA methyltransferase Dnmt1 and the transcription factor Arx in adult mice drives the conversion of α- to β-like cells. In human T1D islets, glucagon+ cells lose DNMT1 and ARX expression and express β cell markers.

