Journal
BIOLOGICAL TRACE ELEMENT RESEARCH
Volume 154, Issue 1, Pages 127-133Publisher
HUMANA PRESS INC
DOI: 10.1007/s12011-013-9711-y
Keywords
Selenium; Ca2+; CaM; MLCK; Uterine smooth muscle
Funding
- National Natural Science Foundation of China [31101865]
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We sought to elucidate the effects of different concentrations of dietary selenium on calcium ion release, MLCK levels, and muscle contraction in the uterine smooth muscle of rats. The selenium (Se) content of blood and of uterine smooth muscle tissues was detected by fluorescence spectrophotometry. Ca2+ content was measured by atomic absorption spectroscopy. Calmodulin (CaM) and MLCK RNA and protein levels were analyzed by quantitative real-time polymerase chain reaction and Western blot, respectively. Dietary Se intake increased the Se levels in the blood and in uterine smooth muscle tissues and increased the Ca2+ concentration in uterine smooth muscle tissues. The addition of Se also promoted CaM expression and enhanced MLCK activation in uterine smooth muscle tissues. In conclusion, Ca2+, CaM, and MLCK were regulated by Se in uterine smooth muscle; Se plays a major role in regulating smooth muscle contraction in the uterus.
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