Effect of sulfur dioxide on endoplasmic reticulum stress protein expression in myocardial tissue of rats with left to right shunt
10.3760/cma.j.issn.2095-428X.2014.01.009
- VernacularTitle:二氧化硫对左向右分流大鼠心肌组织内质网应激蛋白表达的影响
- Author:
Hongmao WANG
1
;
Xiaohui LI
;
Jin FU
;
Xiaodai CUI
;
Hongfang JIN
Author Information
1. 100020,首都儿科研究所附属儿童医院心内科
- Keywords:
Sulfur dioxide;
Endoplasmic reticulum stress;
Glucose regulated protein 78;
c-jun N-terminal kinase;
Phosphorylation-c-jun N-terminal kinase
- From:
Chinese Journal of Applied Clinical Pediatrics
2014;29(1):28-32
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the possible role of sulfur dioxide (SO2) in endoplasmic reticulum stress (ERS) protein expression in myocardial tissue of rats with left to right shunt.Methods A total of 24 male Sprague Dawley rats were randomly divided into sham group(n =8),shunt group(n =8)and shunt plus SO2 donor group (n =8).The rats of shunt group and shunt plus SO2 donor group,an abdominal aorta and inferior vena cava shunting was created.Na2SO3/NaHSO3 was administrated intra-peritoneally in rats of shunt plus SO2 donor group.Eight weeks later,the ratio of quantity of pulmonary to quantity of system (Qp/Qs) was measured ; Heart weight/body weight (HW/BW) and right ventricle/left ventricle + ventricular septum [RV/(LV + SP)] were detected;Expressions of collagen type Ⅰ in right ventricle myocardial tissue was measured by enzyme linked immunosorbent assay (ELISA) ;High performance liquid chromatography was used to measure SO2 content in right ventricle myocardial tissue.Glucose regulated protein 78 (GRP78),c-jun N-terminal kinase(JNK) and phosphorylation-c-jun N-termina kinase(p-JNK) mRNA and protein expressions in RV myocardial tissue were detected by Western blot and real time-polymerase chain reaction(RT-PCR).Results After 8-weeks shunting,Qp/Qs in the shunt and shunt plus SO2 groups were higher significantly than those of the sham group(all P ＜ 0.05).Compared with sham group,HW/BW,RV/LV + SP and expressions of collagen type Ⅰ in the shunt group were significantly higher(all P ＜ 0.05).Treatment of SO2,HW/BW and RV/LV + SP and collagen type Ⅰ in the shunt group were lower significantly(all P ＜ 0.05).The level of SO2 of RV in shunt group increased significantly compared with sham group (all P ＜ O.05),but significantly lower than that of shunt plus SO2 donor group (P ＜ 0.05).Compared with sham group,the expressions of GRP78,JNK and p-JNK mRNA and protein in RV increased significantly in shunt group(P ＜ 0.05).After treatment with SO2,the expressions of GRP78,JNK and p-JNK mRNA and protein decreased significantly (P ＜ 0.05).Conclusion SO2 might protect RV myocardial tissue of the rats with left-right shunt by regulating the expressions of ERS.
