Progerin in muscle leads to thermogenic and metabolic defects via impaired calcium homeostasis

Wan Ping Wang, Jing Ya Wang, Wen Hsin Lin, Cheng Heng Kao, Ming Chun Hung, Yuan Chi Teng, Ting Fen Tsai, Ya Hui Chi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Mutations in lamin A (LMNA) are responsible for a variety of human dystrophic and metabolic diseases. Here, we created a mouse model in which progerin, the lamin A mutant protein that causes Hutchinson–Gilford progeria syndrome (HGPS), can be inducibly overexpressed. Muscle-specific overexpression of progerin was sufficient to induce muscular dystrophy and alter whole-body energy expenditure, leading to premature death. Intriguingly, sarcolipin (Sln), an endoplasmic reticulum (ER)-associated protein involved in heat production, is upregulated in progerin-expressing and Lmna knockout (Lmna−/−) skeletal muscle. The depletion of Sln accelerated the early death of Lmna−/− mice. An examination at the molecular level revealed that progerin recruits Sln and Calnexin to the nuclear periphery. Furthermore, progerin-expressing myoblasts presented enhanced store-operated Ca2+ entry, as well as increased co-localization of STIM1 and ORAI1. These findings suggest that progerin dysregulates calcium homeostasis through an interaction with a subset of ER-associated proteins, resulting in thermogenic and metabolic abnormalities.

Original languageEnglish
Article numbere13090
JournalAging Cell
Volume19
Issue number2
DOIs
StatePublished - 1 Feb 2020

Keywords

  • aging
  • calcium homeostasis
  • lamin A
  • muscular dystrophy
  • progeria

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