Recombinant MG53 protein modulates therapeutic cell membrane repair in treatment of muscular dystrophy.
Mitsugumin 53 (MG53), a muscle-specific TRIM family protein, is an essential component of the cell membrane repair machinery. Here, we examined the translational value of targeting MG53 function in tissue repair and regenerative medicine. Although native MG53 protein is principally restricted to skeletal and cardiac muscle tissues, beneficial effects that protect against cellular injuries are present in nonmuscle cells with overexpression of MG53. In addition to the intracellular action of MG53, injury to the cell membrane exposes a signal that can be detected by MG53, allowing recombinant MG53 protein to repair membrane damage when provided in the extracellular space. Recombinant human MG53 (rhMG53) protein purified from Escherichia coli fermentation provided dose-dependent protection against chemical, mechanical, or ultraviolet-induced damage to both muscle and nonmuscle cells. Injection of rhMG53 through multiple routes decreased muscle pathology in the mdx dystrophic mouse model. Our data support the concept of targeted cell membrane repair in regenerative medicine, and present MG53 protein as an attractive biological reagent for restoration of membrane repair defects in human diseases.
Department of Physiology and Biophysics, Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA. noah.weisleder@umdnj.edu
Noah
N
Weisleder
Norio
N
Takizawa
Peihui
P
Lin
Xianhua
X
Wang
Chunmei
C
Cao
Yan
Y
Zhang
Tao
T
Tan
Christopher
C
Ferrante
Hua
H
Zhu
Pin-Jung
PJ
Chen
Rosalie
R
Yan
Matthew
M
Sterling
Xiaoli
X
Zhao
Moonsun
M
Hwang
Miyuki
M
Takeshima
Chuanxi
C
Cai
Heping
H
Cheng
Hiroshi
H
Takeshima
Rui-Ping
RP
Xiao
Jianjie
J
Ma
D000818:Animals; D015153:Blotting, Western; D016466:CHO Cells; D002352:Carrier Proteins / Q000627:therapeutic use*; D002460:Cell Line; D045744:Cell Line, Tumor; D002462:Cell Membrane / Q000187:drug effects* / Q000378:metabolism*; D006224:Cricetinae; D006801:Humans; D008297:Male; D051379:Mice; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism; D009136:Muscular Dystrophies / Q000188:drug therapy* / Q000378:metabolism*; D000070584:Tripartite Motif Proteins
D002352:Carrier Proteins; C558399:TRIM72 protein, human; D000070584:Tripartite Motif Proteins