黄芪总黄酮对缺血再灌注损伤模型中一氧化氮的作用及其影响

目的：研究黄芪总黄酮（ｔｏｔａｌｆｌａｖｏｎｏｉｄｓｏｆａｓｔｒａｇａｌｕｓ，ＴＦＡ）对缺血再灌注损伤的防护作用。方法：应用家兔失血性休克／再灌注模型（ｓｈｏｃｋ／ｒｅｐｅｒｃｕｓｉｏｎ，Ｓ／Ｒ），观察损伤后血浆中一氧化氮（ｎｉｔｒｉｃｏｘ ｉｄｅ，ＮＯ）代谢终产物亚硝酸盐（ＮＯ２）的变化及ＴＦＡ和磷脂酶Ａ２阻断剂氯喹（Ｃｈｌｑ）治疗对其的影响。结果：数据表明Ｓ／Ｒ后２４ｈ内血浆中ＮＯ２含量，与血ｐＨ值及二氧化碳总量（ＴＣＯ２）下降呈正相关；ＴＦＡ和Ｃｈｌｑ可在一定程度上阻断ＮＯ的减少，且对维持体内酸碱平衡有一定作用。结论：ＴＦＡ对缺血再灌注损伤具有防护作用。

Effect of Total Flavonoids of Astragalus on Nitroxide in Ischemia Reperfusion Injury

Objective: To study the protective effect of total flavonoids of Astragalus (TFA) on ischemia/reperfusion injury. Methods: Change of nitrite (NO 2), the terminal product of nitric oxide (NO) metabolism, and the effect of TFA and chloroquine (a phospholipase A 2 inhibitor) on it were observed with hemorrhagic shock/reperfusion injury (S/R) rabbit model. Results: Plasma NO 2 content was positively correlated with blood pH and total carbon dioxide content lowering. TFA and chloroquine could block the decrease of NO in certain degree and might have some effect on maintaining acid base balance of body. Conclusion: TFA has protective effect on ischemia/reperfusion injury.