iScience (Jul 2021)

ERAD components Derlin-1 and Derlin-2 are essential for postnatal brain development and motor function

  • Takashi Sugiyama,
  • Naoya Murao,
  • Hisae Kadowaki,
  • Keizo Takao,
  • Tsuyoshi Miyakawa,
  • Yosuke Matsushita,
  • Toyomasa Katagiri,
  • Akira Futatsugi,
  • Yohei Shinmyo,
  • Hiroshi Kawasaki,
  • Juro Sakai,
  • Kazutaka Shiomi,
  • Masamitsu Nakazato,
  • Kohsuke Takeda,
  • Katsuhiko Mikoshiba,
  • Hidde L. Ploegh,
  • Hidenori Ichijo,
  • Hideki Nishitoh

Journal volume & issue
Vol. 24, no. 7
p. 102758

Abstract

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Summary: Derlin family members (Derlins) are primarily known as components of the endoplasmic reticulum-associated degradation pathway that eliminates misfolded proteins. Here we report a function of Derlins in the brain development. Deletion of Derlin-1 or Derlin-2 in the central nervous system of mice impaired postnatal brain development, particularly of the cerebellum and striatum, and induced motor control deficits. Derlin-1 or Derlin-2 deficiency reduced neurite outgrowth in vitro and in vivo and surprisingly also inhibited sterol regulatory element binding protein 2 (SREBP-2)-mediated brain cholesterol biosynthesis. In addition, reduced neurite outgrowth due to Derlin-1 deficiency was rescued by SREBP-2 pathway activation. Overall, our findings demonstrate that Derlins sustain brain cholesterol biosynthesis, which is essential for appropriate postnatal brain development and function.

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