Objective To explore the effects of different acupuncture-moxibustion methods on the plasma substance P（SP） content,and the expression of colonic SP m RNA of the rats with functional constipation.Methods Sixty healthy male SD rats were divided into six groups according to the random number table,including blank control group（group B,n=8）,model group（group M,n=11）,drug control group（group D,n=8）,filiform needle group（group F,n=11）,electroacupuncture group（group E,n=11） and moxibustion group（group MB,n=11）.The rats in group B and group M accepted no intervention,gavage with cisapride suspension was conducted in group D,and electroacupuncture,filiform needling and moxibustion therapies were carried out in group E,group F and group MB for 6 days.After treatment,the stool quantity and fecal moisture content during 24 h of the rats were observed in each group,colon tissue structure and the acidic mucus in mucosa layer were observed,plasma SP content was detected and the expression of colonic SP m RNA was detected.Results compared with group B,the stool quantity and fecal moisture content during 24 h of the rats in group M decreased significantly（P0.01）;compared with group M,the stool quantity during 24 h of the rats in each group increased（P0.05 or 0.01）,and the fecal moisture content during 24 h of the rats in each group also increased significantly except group MB（P0.01）;compared with group D,the fecal moisture content during 24 h of the rats in group MB decreased（P0.01）;according to the comparison among the groups with different acupuncture-moxibustion methods,there was no difference in the stool quantity during 24 h of the rats in each group（P0.05）,the fecal moisture contents during 24 h of the rats in group F and group E were higher than that of group MB（P0.01）,and there was no difference between group F and group E（P0.05）.HE staining of colon tissue of rats showed that the structure was normal and complete,and there was no difference among each group.PAS sta
