The protective effect of adenosine preconditioning on ischaemia-reperfusion injury
- Received Date: 2001-04-05
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Key words:
- adenosine /
- preconditioning /
- ischaemia-reperfusion injury
Abstract: OBJECTIVE To investigate the protective effects of preconditioning on cardiac and pulmonary injury induced by lower extremity ischaemia-reperfusion in rats METHODS Animals were randomized into 4 groups and underwent laparotomy The abdominal aorta was isolated and clamped below the renal artery level for 120min then declamped for another 120min Group Ⅰ(n=8)was taken as control Group Ⅱ(n=8) was pretreatedwith ischaemia preconditioning that the lower extremities had experienced 4 times of ischaemia and reperfusion 5 min each before the 240 min treatment began Group Ⅲ(n=8) accepted continuous drip infusion of adenosine Group Ⅳ(n=8)was sham operated All groups were given Evan's blue dye intravenously after anesthesia Mean artery pressure(MAP), myocardium ATPase activities and malonyldiadehyde(MDA), pulmonary MDA and Evan's blue were determined separately. RESULTS MAP was lower in groupⅠand Ⅲ than in Ⅱ and Ⅳ,neither group Ⅰand Ⅲ, norⅡand Ⅳ, had significant differences(Ⅰ:61±14;Ⅱ:86±12; Ⅲ:69±18;Ⅳ:94±23mmHg) Myocardium ATPase activity was lower in group Ⅰthan in group Ⅱ,Ⅲ,Ⅳ(Na+ K+ ATPase 8.1±0.4 vs 8.9±2.1, 9.4±1.0and 9.0±0.8U/mg; Ca2+ ATPase 5.0±0.2 vs 5.3±1.0, 5.9±0.7and 5 7±0 8U/mg; Mg2+ ATPase 4.4±0.3 vs 5.2±0.8, 5.1±0.71and 5.3±0.6 U/mg),the MDA level was higher in groupⅠthan in group Ⅱ,Ⅲ,Ⅳ(MDA 2.5±0.4 vs 1.8±0.7, 1.6±0.5 and 1.7±0.7nmol/mg) Pulmonary MDA and Evan's blue level were higher in group Ⅰthan in the other three groups(MDA 2.3±0.2vs 1.6±0.4, 1.8±0.5 and 1.4±0.6nmol/mg; Evan's blue 3.1±1.2 vs 1.6±0.5, 1.5±0.3and 0.9±0.2μg/mg) CONCLUSION Ischaemia and adenosine preconditioning have some protective effects on cardiac and pulmonary injury induced by ischaemia reperfusion of lower extremity in rats.
Citation: | HU Jia-le, Li Wei, SHEN Fu-ming. The protective effect of adenosine preconditioning on ischaemia-reperfusion injury[J]. Journal of Pharmaceutical Practice and Service, 2001, (4): 206-208,205. |