SENP2 Suppresses Necdin Expression to Promote Brown Adipocyte Differentiation

Cell Rep. 2019 Aug 20;28(8):2004-2011.e4. doi: 10.1016/j.celrep.2019.07.083.

Abstract

Brown adipose tissue (BAT) is a thermogenic organ that maintains body temperature and energy homeostasis. Transcriptional regulation plays an important role in the program of brown adipogenesis. However, it remains unclear how the transcriptional events are controlled in this program. In this study, we analyze an SENP2 BAT conditional knockout mouse model and find that SENP2-mediated de-SUMOylation is essential for BAT development. SENP2 catalyzes de-SUMOylation of cAMP response element-binding protein (CREB) to suppress Necdin expression, which induces brown adipocyte differentiation and brown adipogenesis. Mechanistically, we find that SUMOylation enhances CREB interaction with serine/threonine protein phosphatase 2A (PP2A) to de-phosphorylate CREB, which activates Necdin transcription. SENP2 deficiency enhances the expression of Necdin to inhibit brown adipocyte differentiation. Therefore, we reveal a crucial role of SENP2-mediated de-SUMOylation of CREB in suppression of Necdin expression during brown adipose development and brown adipogenesis.

Keywords: CREB; Necdin; SENP2; SUMOylation; brown adipogenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipocytes, Brown / cytology*
  • Adipocytes, Brown / metabolism*
  • Adipose Tissue, Brown / cytology
  • Adipose Tissue, Brown / growth & development
  • Animals
  • Cell Differentiation*
  • Cell Line
  • Cyclic AMP Response Element-Binding Protein / metabolism
  • Cysteine Endopeptidases / deficiency
  • Cysteine Endopeptidases / metabolism*
  • Humans
  • Male
  • Mice
  • Nerve Tissue Proteins / metabolism*
  • Nuclear Proteins / metabolism*
  • Sumoylation

Substances

  • Cyclic AMP Response Element-Binding Protein
  • Nerve Tissue Proteins
  • Nuclear Proteins
  • necdin
  • Cysteine Endopeptidases
  • Senp2 protein, mouse