超氧化物歧化酶对大鼠感染性脑损伤的内源性保护作用

测定脑组织丙二醛（ＭＤＡ）和６种超氧化物歧化酶（Ｔ－ＳＯＤ，ＣｕＺｎ－ＳＯＤ及Ｍｎ－ＳＯＤ）活性大鼠百日咳杆菌脑损伤中的变化，探讨ＳＯＤ的内源性脂质抗氧化作用。结果显示：菌液组（４ｈ，２４ｈ）脑含水量（ＷＣ）、伊文思蓝含量（ＥＢ）及Ｍｎ－ＳＯＤ活性均高于盐水对照组，Ｔ－ＳＯＤ和ＣｕＺｕ－ＳＯＤ活性低于盐水组（Ｐ〈０．０１），ＭＤ基菌液４ｈ组明显增高，并分别与ＷＣ和ＥＢ旦显著正相关（ｒ＝０．９６５０

Endogenous protective effects of superoxide dismutases on infectious brain injury in rats]

We studied the alterations of MDA and three forms of SOD activities such as T-SOD, CuZn-SOD, and Mn-SOD in rat cerebral tissues injected by bordetella pertussis (BP) to elucidate protective mechanism of SOD against the infectious brain injury. The results were that water content(WC), Evans blue content(EB), MDA, and Mn-SOD activities in 4 h and 24 h BP-treated groups increased and T-SOD and CuZn-SOD decreased compared to corresponding normal saline(NS)-treated groups, respectively(P < 0.01); MDA increased and had a positive correlation with WC and EB in 4 h BP treated group (r = 0.9650, r = 0.9441, P < 0.01, P < 0.01, respectively); Mn-SOD activities were elevated and had a negative correlation with WC, EB, and MDA (r = -0.8650, r = -0.9021, r = -0.9346, P < 0.01, P < 0.01, P < 0.01, respectively) in 24 h BP-treated group. The results suggest that the increase of component Mn-SOD activities may play an important role in vivo endogenous protective mechanism against delayed infectious brain injury.