Expression of potassium ion channel mRNA in myocardial tissue of mice with low selenium
10.3760/cma.j.issn.2095-4255.2014.01.014
- VernacularTitle:低硒对小鼠心肌钾离子通道基因mRNA表达的影响
- Author:
Meina SUN
;
Fenglan LI
;
Handong ZHAO
;
Hui LI
- Publication Type:Journal Article
- Keywords:
Selenium;
Mouse;
Potassium ion channel
- From:
Chinese Journal of Endemiology
2014;33(1):46-48
- CountryChina
- Language:Chinese
-
Abstract:
Objective To examine the expression of potassium channel mRNA in myocardial tissue of mice with low selenium.Methods Forty C57BL/6 mice were randomly divided into four groups according to body weight(18-22 g),10 mice in each group,half male and half female.The low-selenium treatment groups were fed with low-selenium diet(selenium content was 0.004 mg/kg) for 4,12 and 24 weeks,respectively,and the control group was fed with normal diet(selenium content was 0.256 mg/kg).The mice were killed by cutting neck method,hearts were taken out and RNA was extracted by Trizol method.The expressions of potassium ion channel genes (KCNA4,KCND2,KCND3,KCNE1,KCNE2,KCNJ2,KCNJ12 and KCNQ1) at the mRNA level in heart were determined using real-time polymerase chain reaction.Results In low-selenium 4 weeks group,the mRNA expressions of KCNA4 gene(25.3 ± 0.09) and KCND2 gene(4.85 ± 0.05) were higher than that of the control group (1.00 ± 0.00,1.00 ± 0.00,all P ＜ 0.05); in low-selenium 24 weeks group,the mRNA expression of KCNJ12 gene (22.7 ± 0.10) was higher than that of the control group(1.00 ± 0.00,P ＜ 0.05); the mRNA expressions of KCND3,KCNE1,KCNE2,KCNJ2,KCNQ1 genes were compared with the corresponding control groups,the differences were not statistically significant(all P ＞ 0.05).Conclusions Low selenium can affect the mRNA expression of mouse cardiac potassium ion channel genes.
