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Article in Chinese | MEDLINE | ID: mdl-26016233

ABSTRACT

OBJECTIVE: To investigate the expression profile of interleuki-1ß (IL-1ß) in rat myocardium at different time points during hypoxia/reoxygenation(H/R)transition. METHODS: The isolated Langendorff perfused rat heart model was established.Forty SD rats were randomly divided into sham group (A group) and hypoxia/reoxygenation group (H/R group). The H/R group rats were subdivided into H/R 0.5 h group(B group), H/R 1 h group(C group), H/R 2 h group(D group)according to reoxygenation time. The left ventricular development pressure(LVDP), maximal rates of increase/decrease of the left ventricular pressure(±dp/dtmax) were continuously recorded. The concentration of interleukin-1ß(IL-lß) and creatine kinase-MB (CK-MB) in myocardium was measured by ELISA. The mRNA expression of IL-lß in myocardium was determined by RT-PCR. Microstructure of myocardium was observed under light microscopy. RESULTS: The value of LVDP and ±dp/dtmax in hypoxia/reoxygenation group rat were significantly lower than that in sham group(P < 0.05). The expression of IL-lß and CK-MB at protein level and the expression of IL-1ß at mRNA level in hypoxia /reoxygenation group were higher than that in sham group(P < 0. 05). There were significant differences of the above parameters among H/R 0.5 h, 1 h, 2 h group(P <0.05). The concentration of IL-1ß and CK-MB, the mRNA expression of IL-1ß were higher in H/R 2 h group than that of other groups(P < 0.05). CONCLUSION: The high expression of IL-Iß in myocardium after myocardial hypoxia /reoxygenation in rats might lead to. ischemia/reperfusion injury.


Subject(s)
Hypoxia/metabolism , Interleukin-1beta/metabolism , Myocardial Ischemia/metabolism , Myocardium/metabolism , Animals , Creatine Kinase, MB Form/metabolism , Disease Models, Animal , Hypoxia/pathology , Myocardium/pathology , Rats , Rats, Sprague-Dawley
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