Study of changing levels of AP-1 in hippocampus of delayed encephalopathy after acute carbon monoxide poisoning rats / 中国免疫学杂志

ABSTRACT

Objective:To investigate the levels of AP-1 in hippocampus of rats at different time points after carbon monoxide poisoning.Methods: Carbon monoxide poisoning delayed encephalopathy model by using intraperitoneal injection of carbon monoxide.Uesd HE observed the pathological changes in hippocampus of rats.The levels of AP-1 was observed by immunohistochemistry and Western blot analysis.TUNEL was used to detect apoptotic neurons in hippocampal CA1 area.Results: HE dyeing conditions,the hippocampus cell of air group (AC) and blank group (BC) were normal at each time point.Pathological changes occurred in the hippocampus cell of Carbon monoxide group (CO),reduction in the number of cells,disorder of cells,intercellular space expansion,nuclear fragmentation,anachromasis and pyknotic.Immunohistochemical results,the AP-1 expression level at each time point in group CO were higher than group AC and BC.On 3th day it reached a peak.The comparison at all time points among the groups in the first three days were significantly different in statistics(P<0.05).Western blot results,the expression of AP-1 was consistented with the immunohistochemical results on the time distribution trend.TUNEL results,AI in group CO was higher than those in group AC and BC at all time points,there were significant differences(P<0.05) and 7th reached the peak of apopotsis.Conclusion: Inside the hippocampus of rats,there are increasing in AP-1 . Maybe it is one of the important pathogenesis of DEACMP .