Ankrd2 in Mechanotransduction and Oxidative Stress Response in Skeletal Muscle: New Cues for the Pathogenesis of Muscular Laminopathies

Oxid Med Cell Longev. 2019 Jul 24:2019:7318796. doi: 10.1155/2019/7318796. eCollection 2019.

Abstract

Ankrd2 (ankyrin repeats containing domain 2) or Arpp (ankyrin repeat, PEST sequence, and proline-rich region) is a member of the muscle ankyrin repeat protein family. Ankrd2 is mostly expressed in skeletal muscle, where it plays an intriguing role in the transcriptional response to stress induced by mechanical stimulation as well as by cellular reactive oxygen species. Our studies in myoblasts from Emery-Dreifuss muscular dystrophy 2, a LMNA-linked disease affecting skeletal and cardiac muscles, demonstrated that Ankrd2 is a lamin A-binding protein and that mutated lamins found in Emery-Dreifuss muscular dystrophy change the dynamics of Ankrd2 nuclear import, thus affecting oxidative stress response. In this review, besides describing the latest advances related to Ankrd2 studies, including novel discoveries on Ankrd2 isoform-specific functions, we report the main findings on the relationship of Ankrd2 with A-type lamins and discuss known and potential mechanisms involving defective Ankrd2-lamin A interplay in the pathogenesis of muscular laminopathies.

Publication types

  • Review

MeSH terms

  • Humans
  • Lamin Type A / metabolism
  • Mechanotransduction, Cellular
  • Muscle Proteins / chemistry
  • Muscle Proteins / metabolism*
  • Muscle, Skeletal / metabolism*
  • Muscular Dystrophy, Emery-Dreifuss / metabolism
  • Muscular Dystrophy, Emery-Dreifuss / pathology*
  • Myocardium / metabolism
  • Nuclear Proteins / chemistry
  • Nuclear Proteins / metabolism*
  • Oxidative Stress*
  • Protein Isoforms / chemistry
  • Protein Isoforms / metabolism
  • Reactive Oxygen Species / metabolism
  • Repressor Proteins / chemistry
  • Repressor Proteins / metabolism*

Substances

  • ANKRD2 protein, human
  • Lamin Type A
  • Muscle Proteins
  • Nuclear Proteins
  • Protein Isoforms
  • Reactive Oxygen Species
  • Repressor Proteins