ObjectiveTo investigate the role and related mechanisms of mast cells （MCs） in alcoholic cardiomyopathy （ACM）. MethodsAn ACM model was established in C57BL/6 mice by feeding them with alcohol liquid diet， and some model mice were intervened with cromolyn sodium， a mast cell stabilizer. Cardiac function， myocardial remodeling and the expression of related proteins were evaluated by echocardiography， tissue staining and Western blot. In vitro， neonatal rat ventricular cardiomyocytes （NRVCs） were stimulated with mast cell granules （MCGs） and/or alcohol， and pathway inhibitors were used to explore the underlying mechanisms. ResultsLong-term alcohol feeding caused significant cardiac dysfunction and mast cells activation in mice， accompanied by increased expressions of chymase， NOX2， NOX4 and apoptosis-related protein cleaved Caspase-3 （c-Caspase3） in myocardial tissues （P＜0.05）. Pretreatment with cromolyn sodium improved cardiac function， inhibited mast cell activation， and reduced the expressions of the above proteins. In vitro experiments showed that treatment with MCGs or alcohol alone up-regulated the expressions of c-Caspase3， NOX2， NOX4 and phosphorylated PKCβ1 （p-PKCβ1） in cardiomyocytes， and the combined stimulation of the two had a synergistic effect. Protease-activated receptor 2 （PAR2） inhibitor down-regulated the MCG-induced expressions of the above proteins. PKCβ1 inhibitor also inhibited the MCG-induced expressions of c-Caspase3， NOX2 and NOX4. Chymase inhibitor exerted a partial inhibitory effect on MCG-induced cardiomyocyte apoptosis. ConclusionDuring the development of ACM， mast cells are activated， and the released MCGs may promote cardiomyocyte apoptosis through the PAR2-PKCβ1-NOX2/NOX4 signaling pathway， in which chymase plays an important role.

Objective To evaluate the psychological intervention ettectiveness ot socioenvironmental therapyfor heroin addicts accepting compulsory isolation.Methods Totally 100 male heroin addicts accepting compulsory isolation and Labour Camp Rehabilitation were selected and randomly assigned to socioenvironmental therapeutic group (ST group,50 cases) and control group (CT group,50 cases).A two-month socioenvironmental therapy was selectively proceeding in ST group by a same psychological team,while CT group still received conventional rehabilitation.During the 6-month follow-up,self-rating anxiety scale(SAS),self-rating depression scal (SDS) and self-made questionnaires were used every 3 months,to statistically estimate psychological status of subjects.Results Before treatment,no statistically significant difference between the two groups;after treatment,SDS score of CT group was 56.16 ± 9.12,and was lower than that in ST group(48.28-± 9.55) (P ＜ 0.01) ; SAS score of ST group was 46.28 ± 7.78,and was lower than that in CT group (50.72 ± 8.32) (P ＜ 0.01).In the 3-month follow-up evaluation,depression,anxiety scores in CT and ST group were significantly lower,the difference was statistically significant (P ＜ 0.01) ; 6 months after treatment,depression,anxiety score showed was significant difference between two groups(P＜ 0.01).Conclusion Group psychotherapy especially socioenvironmental therapy is quick and long-acting in improving the psychological status of heroin addicts in aspects of depression and anxiety levels,which is distinctly evidenced by the short-term and long-term curative results.