APOBEC2 negatively regulates myoblast differentiation in muscle regeneration

Hideaki Ohtsubo, Yusuke Sato, Takahiro Suzuki, Wataru Mizunoya, Mako Nakamura, Ryuichi Tatsumi, Yoshihide Ikeuchi

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

Recently we found that the deficiency of APOBEC2, a member of apoB mRNA editing enzyme, catalytic polypeptide-like family, leads to a diminished muscle mass and increased myofiber with centrally-located nuclei known as dystrophic phenotypes. APOBEC2 expression is predominant in skeletal and cardiac muscles and elevated exclusively at the early-differentiation phase of wild-type (WT) myoblast cultures; however the physiological significance is still un-known. Here we show that APOBEC2 is a key negative regulator of myoblast differentiation in muscle regeneration. APOBEC2-knockout (A2KO) mice myoblast cultures displayed a normal morphology of primary myotubes along with earlier increase in fusion index and higher expression levels of myosin heavy chain (MyHC), myogenin and its cooperating factor MEF2C than WT myoblasts. Similar response was observable in APOBEC2-knockdown cultures of WT myoblasts that were transfected with the specific siRNA at the differentiation phase (not proliferation phase). Importantly, cardiotoxin-injured A2KO gastrocnemius muscle provided in vivo evidence by showing larger up-regulation of neonatal MyHC and myogenin and hence earlier regeneration of myofiber structures with diminished cross-sectional areas and minimal Feret diameters. Therefore, the findings highlight a promising role for APOBEC2 in normal progression of regenerative myogenesis at the early-differentiation phase upon muscle injury.

元の言語英語
ページ(範囲)91-101
ページ数11
ジャーナルInternational Journal of Biochemistry and Cell Biology
85
DOI
出版物ステータス出版済み - 4 1 2017

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Myoblasts
Muscle
Regeneration
Muscles
Myogenin
Myosin Heavy Chains
Skeletal Muscle
Cardiotoxins
Muscle Development
Skeletal Muscle Fibers
Apolipoproteins B
Knockout Mice
Small Interfering RNA
Myocardium
Up-Regulation
Fusion reactions
Phenotype
Messenger RNA
Peptides
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Cell Biology

これを引用

APOBEC2 negatively regulates myoblast differentiation in muscle regeneration. / Ohtsubo, Hideaki; Sato, Yusuke; Suzuki, Takahiro; Mizunoya, Wataru; Nakamura, Mako; Tatsumi, Ryuichi; Ikeuchi, Yoshihide.

:: International Journal of Biochemistry and Cell Biology, 巻 85, 01.04.2017, p. 91-101.

研究成果: ジャーナルへの寄稿記事

Ohtsubo, Hideaki ; Sato, Yusuke ; Suzuki, Takahiro ; Mizunoya, Wataru ; Nakamura, Mako ; Tatsumi, Ryuichi ; Ikeuchi, Yoshihide. / APOBEC2 negatively regulates myoblast differentiation in muscle regeneration. :: International Journal of Biochemistry and Cell Biology. 2017 ; 巻 85. pp. 91-101.
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AU - Tatsumi, Ryuichi

AU - Ikeuchi, Yoshihide

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