Nkx6. 1‐mediated insulin secretion and β‐cell proliferation is dependent on upregulation of c‐Fos

JD Ray, KB Kener, BF Bitner, BJ Wright… - FEBS …, 2016 - Wiley Online Library
JD Ray, KB Kener, BF Bitner, BJ Wright, MS Ballard, EJ Barrett, JT Hill, LG Moss, JS Tessem
FEBS letters, 2016Wiley Online Library
Understanding the molecular pathways that enhance β‐cell proliferation, survival, and
insulin secretion may be useful to improve treatments for diabetes. Nkx6. 1 induces
proliferation through the Nr4a nuclear receptors, and improves insulin secretion and survival
through the peptide hormone VGF. Here we demonstrate that Nkx6. 1‐mediated
upregulation of Nr4a1, Nr4a3, and VGF is dependent on c‐Fos expression. c‐Fos
overexpression results in activation of Nkx6. 1 responsive genes and increases β‐cell …
Understanding the molecular pathways that enhance β‐cell proliferation, survival, and insulin secretion may be useful to improve treatments for diabetes. Nkx6.1 induces proliferation through the Nr4a nuclear receptors, and improves insulin secretion and survival through the peptide hormone VGF. Here we demonstrate that Nkx6.1‐mediated upregulation of Nr4a1, Nr4a3, and VGF is dependent on c‐Fos expression. c‐Fos overexpression results in activation of Nkx6.1 responsive genes and increases β‐cell proliferation, insulin secretion, and cellular survival. c‐Fos knockdown impedes Nkx6.1‐mediated β‐cell proliferation and insulin secretion. These data demonstrate that c‐Fos is critical for Nkx6.1‐mediated expansion of functional β‐cell mass.
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