搜索

大鼠腦出血血腫周圍補體與細(xì)胞凋亡的動態(tài)觀察

摘要:目的:動態(tài)觀察大鼠腦出血后血腫周圍組織補體激活與細(xì)胞凋亡的規(guī)律。方法:用膠原酶注入到大鼠尾狀核的方法制作腦出血模型。將大鼠分為腦出血、假手術(shù)組、正常組3組。采用蘇木素伊紅(HE) 染色、免疫組織化學(xué)染色及原位末端脫氧核苷酸轉(zhuǎn)移酶介導(dǎo)的dUTP 缺口末端標(biāo)記法(TUNEL)分別觀察各組在腦出血后第6 h、12 h、24 h、48 h、72 h、5 d、7 d時血腫周圍補體C3、促凋亡基因(Bax)、抑凋亡基因(Bclxl)及TUNEL的表達(dá)。結(jié)果補體C3的表達(dá)峰值在24~48 h;TUNEL、Bax蛋白表達(dá)術(shù)后12h增加,48~72 h達(dá)高峰,而Bclxl蛋白表達(dá)高峰在48h。結(jié)論:大鼠腦出血后血腫周圍組織補體C3的表達(dá)增加與細(xì)胞凋亡的演變趨勢一致,C3與凋亡有相關(guān)。Abstract: Objective: To study the complement activation and apoptosis regular genes changes in the tissues of the perihematoma of intracerebral hemorrhage (ICH) in rats. Methods: Intracerebral hemorrhage was induced in rats by injection of bacterial collagenase into the caudate nucleus. Histopathological changes were studied in 6 h,12 h, 24 h, 2 d, 3 d, 5 d, 7 d after the injection. The immunohistochemistry and TUNEL analysis were performed. The expression of complement factor C3, the TUNELpositive cells, the proapoptotic gene expression (Bax) and the antiapoptotic gene (Bclxl) were examined. Results: The expression of C3 increased to its maximum between 2448 h. The TUNELpositive cells and Bax protein expression increased gradually and reached the peak level between 4872 h. The Bclxl protein reached the peak level at 48 h. The correlation analysis showed that the quantity of C3 was positively related to that of the TUNELpositive cells, but the bax protein was not related to Bclxl protein. Conclusion: The expression of complement factor C3 may contributes to the nerve injury after cerebral hemorrhage and relate to the apotosis in the tissues surrounding the hametoma in rats.