Papers

Peer-reviewed International journal
May, 2013

Drosophila type XV/XVIII collagen mutants manifest integrin mediated mitochondrial dysfunction, which is improved by cyclosporin A and losartan

INTERNATIONAL JOURNAL OF BIOCHEMISTRY & CELL BIOLOGY
  • Ryusuke Momota
  • ,
  • Masahiro Narasaki
  • ,
  • Takaaki Komiyama
  • ,
  • Ichiro Naito
  • ,
  • Yoshifumi Ninomiya
  • ,
  • Aiji Ohtsuka

Volume
45
Number
5
First page
1003
Last page
1011
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1016/j.biocel.2013.02.001
Publisher
PERGAMON-ELSEVIER SCIENCE LTD

Vertebrate collagen types XV and XVIII are broadly distributed basement membrane components, classified into a structurally distinct subgroup called "multiplexin collagens". Mutations in mammalian multiplexins are identified in some degenerative diseases such as Knobloch syndrome 1 (KNO1) or skeletal/cardiac myopathies, however, these progressive properties have not been elucidated. Here we investigated Drosophila mutants of Multiplexin (Mp), the only orthologue of vertebrate collagen types XV and XVIII, to understand the pathogenesis of multiplexin-related diseases. The mp mutants exhibited morphological changes in cardiomyocytes and progressive dysfunction of the skeletal muscles, reminiscent phenotypes observed in Col15a1-null mice. Ultrastructural analysis revealed morphologically altered mitochondria in mutants' indirect flight muscles (IFMs), resulting in severely attenuated ATP production and enhanced reactive oxygen species (ROS) production. In addition, mutants' IFMs exhibited diminished PPS integrin clustering and abolished focal adhesion kinase (FAK) phosphorylation. Furthermore, mutants' defective IFMs are improved by the administrations of cyclosporin A, an inhibitor against mitochondrial permeability transition pore (mPTP) opening or losartan, an angiotensin II type 1 receptor (AT1R) blocker. Thus, our results suggest that Mp modulates mPTP opening and AT1R activity through its binding to integrin and that lack of Mp causes unregulated mPTP opening and AT1R activity, leading to mitochondrial dysfunctions. Hence, our results provide new insights towards the roles of multiplexin collagens in mitochondrial homeostasis and may serve as pharmacological evidences for the potential use of cyclosporin A or losartan for the therapeutic strategies. (C) 2013 Elsevier Ltd. All rights reserved.


Link information
DOI
https://doi.org/10.1016/j.biocel.2013.02.001
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/23454281
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000317884100012&DestApp=WOS_CPL
URL
http://orcid.org/0000-0002-7003-3444
ID information
  • DOI : 10.1016/j.biocel.2013.02.001
  • ISSN : 1357-2725
  • eISSN : 1878-5875
  • ORCID - Put Code : 9101207
  • Pubmed ID : 23454281
  • Web of Science ID : WOS:000317884100012

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