Effects of hydrogen sulfide on neural function after cardiopulmonary resuscitation in rabbits
10.3760/cma.j.issn.1671-0282.2012.09.016
- VernacularTitle:硫化氢对兔心搏骤停复苏后神经功能的影响
- Author:
Miaomiao TIAN
;
Bing ZHANG
;
Liqun BAI
;
Wenzhi LI
- Publication Type:Journal Article
- Keywords:
Hydrogen sulfide;
Cardiopulmonary resuscitation;
Neuron-specific enolase;
S100B;
Neurons;
Apoptosis
- From:
Chinese Journal of Emergency Medicine
2012;21(9):987-991
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effects of hydrogen sulfide (H2S) on neuron specific-enolase (NSE),neurotrophic protein S100B and neurons apoptosis in hippocampus CA1 region in the early stage of cardiopulmonary resuscitation (CPR) in rabbits. Methods Twenty-five Japanese white rabbits were randomly divided into three groups:sham group (S group),cardiac arrest group (CA group) and H2S treatment group (H2S group). Rabbits were anaesthetized with 5％ halothane,trachea was exposed and intuhated,right femoral vein was cannulated for medical agent administration,and right carotid artery was cannulated for monitoring of blood pressure and blood samples taken. Cardiac arrest was produced by suffocation with clamping the endotracheal tube and turning off mechanical ventilation.Mter 8 min of the endotracheal tube clamping, rabbits received CPR. After the restoration of spontaneous circulation (ROSC),rabbits in groups CA and H2S inhaled 30％ O2 or 30％ O2 containing 80 × 10-6 H2S,respectively.Blood samples were taken before,and 30 min and 60 min after ROSC for detection of the concentrations of NSE and S100B in the plasma. As 60 min after ROSC,rabbits were decapitated after perfusion with 500 ml phosphate-buffered saline and followed by 4％ paraformaldehyde 500 ml through aortic artery,and then the hippocampus was removed rapidly and fixed in 4％ paraformaldehyde for the histological examination.All values were expressed in mean ± standard deviation ((x) ± s).Comparisons were carried out among different groups with SNK-q test of one-way analysis of variance ( One-Way ANOVA plus SNK).Results In comparison with group S,the concentrations of NSE and S100B were significantly increased 30 min and 60 min after ROSC (P ＜ O.05),the viable neurons were decreased and cleaved caspase-3 positive neurons in hippocampus CA1 region increased 60 min after ROSC in groups CA and H2S (P ＜0.05).In comparison with group CA,the concentration of S1OOB decreased 60 min after ROSC (P ＜ 0.05) ; the viable neurons were increased while cleaved caspase-3 positive neurons in hippocampus CA1 region decreased 60 min after ROSC in group H2S ( P ＜ 0.05 ). Conclusions H2S can inhibit the neurons apoptosis in hippocampus CA1 region,increase the viable neurons,decrease the concentration of S100B in the plasma,and then attenuate the cerebral injury after cardiopulmonary resuscitation in rabbits.
