Papers

Peer-reviewed International journal
Nov 27, 2021

Imaging-based evaluation of pathogenicity by novel DNM2 variants associated with centronuclear myopathy.

Human mutation
  • Kenshiro Fujise
  • ,
  • Mariko Okubo
  • ,
  • Tadashi Abe
  • ,
  • Hiroshi Yamada
  • ,
  • Kohji Takei
  • ,
  • Ichizo Nishino
  • ,
  • Tetsuya Takeda
  • ,
  • Satoru Noguchi

Volume
43
Number
2
First page
169
Last page
179
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1002/humu.24307

A centronuclear myopathy (CNM) is a group of inherited congenital diseases showing clinically progressive muscle weakness associated with the presence of centralized myonuclei, diagnosed by genetic testing and muscle biopsy. The gene encoding dynamin 2, DNM2, has been identified as a causative gene for an autosomal dominant form of CNM. However, the information of a DNM2 variant alone is not always sufficient to gain a definitive diagnosis as the pathogenicity of many gene variants is currently unknown. In this study, we identified five novel DNM2 variants in our cohort. To establish the pathogenicity of these variants without using clinicopathological information, we used a simple in cellulo imaging-based assay for T-tubule-like structures to provide quantitative data that enable objective determination of pathogenicity by novel DNM2 variants. With this assay, we demonstrated that the phenotypes induced by mutant dynamin 2 in cellulo are well correlated with biochemical gain-of-function features of mutant dynamin 2 as well as the clinicopathological phenotypes of each patient. Our approach of combining an in cellulo assay with clinical information of the patients also explains the course of a disease progression by the pathogenesis of each variant in DNM2-associated CNM.

Link information
DOI
https://doi.org/10.1002/humu.24307
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/34837441
ID information
  • DOI : 10.1002/humu.24307
  • Pubmed ID : 34837441

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