The effects of Penehyclidine Hydrochloride on [ Ca2+ ]i and the expression of cysteine-containing aspartare-specific proteases-3 in neural cells of neonatal rats with hypoxic-ischemic encephalopathy
10.3760/cma.j.issn.1673-4912.2012.01.025
- VernacularTitle:盐酸戊乙奎醚对新生大鼠缺氧缺血性脑病模型脑细胞钙离子浓度及天冬氨酸特异性半胱氨酸蛋白酶-3表达的影响
- Author:
Li LI
;
Ruilan LI
;
Li XING
;
Haiyong LI
;
Hongxiang LI
;
Mingfeng YANG
- Publication Type:Journal Article
- Keywords:
Penehyclidine Hydrocloride;
Hypoxic-ischemic encephalopathy;
Calcium;
Cysteine-containing aspartate-specific proteases-3;
Rat,newborn
- From:
Chinese Pediatric Emergency Medicine
2012;19(1):71-75
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo explore the influences of Penehyclidine Hydrochloride on [ Ca2 + ] i and the expression of cysteine-containing aspartate-specific proteases-3 (Caspase-3) in neural cells of neonatal rats after hypoxic-ischemic injury within 12 h.MethodsSeven-day-old Sprage-Dowley rats ( n =128) were randomly assigned into four groups:Sham group ( sham operation group,n =32),hypoxic-ischemic encephalopathy (HIE) group ( HIE models,n =32 ),N group ( HIE models treated with Nimodipine,n =32 ),and P group (HIE models treated with Penehyclidine Hydrocloride,n =32).Brain tissues were collected at different time points (2 h,4 h,6 h,and 12 h) after modeling.We utilized fluorescent microscope to detect the expression of Caspase-3 via making frozen slices of rat brain tissue,while [ Ca2+ ]iof neural cells in live brain slices of rats was measured by laser scanning confocal microscope.ResultsCompared with Sham group,both [ Ca2 + ] i and the expression of Caspase-3 of neural cells increased significantly ( P ＜ 0.01 ) in brain cortex in HIE group.[ Ca2 + ] i and Caspase-3 activity increased gradually with time since 2 h after making HIE models and reached a peak at the time points of 12 h ( P ＜0.05).In N group and P group,both of [ Ca2+ ]i and Caspase-3 decreased compared with HIE group (P ＜0.01 ),however,there was no significant difference between N group and P group ( P ＞ 0.05 ).In addition,[ Ca2 + ] i and Caspase-3 activity had no significant difference between 6 h and 12 h (P ＞ 0.05 ).ConclusionPenehyclidine Hydrocloride can protect the brain tissue from hypoxic-ischemic injury via relief of calcium overload and inhibition of Caspase-3 activity.
