The effects of wild-type and mutant SOD1 on smooth muscle contraction
Author(s) -
Aleksandra NikolićKokić,
Zorana Oreščanin-Dušić,
Ivan Spasojević,
Duško Blagojević,
Zorica Stević,
Pavle Andjus,
Mihajlo Spasić
Publication year - 2014
Publication title -
archives of biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.217
H-Index - 25
eISSN - 1821-4339
pISSN - 0354-4664
DOI - 10.2298/abs141006023n
Subject(s) - sod1 , amyotrophic lateral sclerosis , isometric exercise , superoxide dismutase , chemistry , wild type , genetically modified mouse , mutant , dismutase , medicine , endocrinology , microbiology and biotechnology , enzyme , biology , biochemistry , transgene , gene , disease
In this work we compared the mutated liver copper zinc-containing superoxide dismutase (SOD1) protein G93A of the transgenic rat model of familial amyotrophic lateral sclerosis (FALS), to wild-type (WT) rat SOD1. We examined their enzymatic activities and effects on isometric contractions of uteri of healthy virgin rats. G93A SOD1 showed a slightly higher activity than WT SOD1 and, in contrast to WT SOD1, G93A SOD1 did not induce smooth muscle relaxation. This result indicates that effects on smooth muscles are not related to SOD1 enzyme activity and suggest that heterodimers of G93A SOD1 form an ion-conducting pore that diminishes the relaxatory effects of SOD1. We propose that this type of pathogenic feedback affects neurons in FALS. [Projekat Ministarstva nauke Republike Srbije, br. 173014 i br. 175083
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