Relationship of impaired brain function after sevoflurane-nitrous oxide anesthesia and CREB signal pathway / 局解手术学杂志

ABSTRACT

Objective To explore the relationship of impaired brain function after emergency inhalation anesthesia of sevoflurane com -bined with nitrous oxide and cyclic AMP response element binding protein(CREB)signal pathway.Methods A total of 442 patients who were admitted into our hospital from January 2014 to April 2017 were selected as the object of this study.And these patients were divided into 3 groups according to different anesthesia ways,namely the inhalation anesthesia group(118 cases),the local anesthesia group(206 cases), and the control group(118 cases).The blood cyclic adenosine monophosphate(cAMP)concentration were examined by the mini mental state examination(MMSE)score scale.At the same time,the 60 rats were randomly divided into the anesthesia group(n=30)and the con-trol group(n=30).The learning and memory function of the two groups were evaluated by Morris water maze test,and the expressions of cAMP and CREB were measured.Results The blood cAMP concentration and MMSE score in the inhalation anesthesia group were signifi -cantly decreased after inhalation anesthesia(P<0.05).In the place navigation test,rats of the anesthesia group cost much more time to find the platform compared with rats in the control group, and rats of the anesthesia group encountered less times of crossing the platform com-pared with rats in the control group,and the difference was significant(P<0.05).Western blot showed that patients of the anesthesia group had lower cAMP and expression of p-CREB protein,with significant difference(P<0.05).Conclusion Brain function decline after sevoflu-rane inhalation anesthesia combined with nitrous oxide may induced by increasing the nucleus of the second messenger CAMP /Ca2+pathway and decreasing the expression of CREB.