Objective To study the analgesic effect of Eupatorium odoratum L and its mechanism .Methods Mice were random‐ly divided into 6 groups .Swinging tail method in spinal cord destroyed mouse ,hot‐plate and twisted body method in naloxone blocked mouse ,and formalin‐induce inflammatory pain method were done to investigate the analgesic effect of Eupatorium odoratum L .Each pain index under each experiment condition was determined after intra gastric administration of each group of mice .The concentration of NO and PGE2 in serum and brain were measured to study its mechanisms .Results High‐dose of Eupatorium odor‐atum L significantly enhanced pain threshold in either spinal cord destroyed or naloxone blocked mouse with pain induced by hot and acetic acid(P<0 .05) .High and middle dosage groups of Eupatorium odoratum L markedly reduced the first‐and second‐phase re‐sponses of formalin‐induced inflammatory pain mouse(P< 0 .05) ,and decreased the writhing times and licking rear feet times caused by twisted body method(P<0 .05) .The level of NO and PGE2 in serum and brain of mouse induced by formalin were both decreased(P<0 .05) .Conclusion Eupatorium odoratum L has notable analgesic effect ,which may be related to reduce the level of NO and PGE2 in central and peripheral site .

Objective To investigate the difference of MT4 G-201A of Metallothionein (metallotionein, MT) family gene locus single nucleotide polymorphisms (SNPs) in type 2 diabetes and essential hypertension. Mothods We selected 324 cases of patients with type 2 diabetes, 301 cases of patients with essential hypertension, 301 case of normal physical examination population. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis technology was used to detect MT4 G-201A polymorphism. Results (1) The genotype GG, GA and AA frequency of MT4 G-201A in 324 cases of patients with type 2 diabetes,301 cases of patients with essential hypertension, 301 case of normal physical examination population were 39.5%, 46.6%, 13.9%;42.2%, 48.5%, 9.3%;and 42.5%, 51.5%, 6.0%, respectively. The genotypes in all the distribution were in Hardy-Weinberg equilibrium (P>0.05) . (2) MT4 G-201A polymorphism:Three groups of genotype and allele frequency distribution (G and A) had differences (P<0.05) ; there was no difference between essential hypertension group and normal group (P>0.05);there was a difference between type 2 diabetes group and the normal group (P<0.05);there was no significant difference in genotype and allele frequency distribution (P>0.05) . (3) MT4 G-201A polymorphism in Men:Three groups of genotype and allele frequency distribution had differences (P<0.05) . In essential hypertension and type 2 diabetes group, there was no significant difference in genotype and allele frequency distribution (P>0.05) .MT4 G-201A polymorphism between women:Three groups of genotype and allele frequency distribution had differences (P<0.05), there was a difference between type 2 diabetes and normal group genotypes (P<0.05) . Conclusions (1) There is correlation of MT gene G-210A polymorphism and type 2 diabetes, no association with essential hypertension. (2) There is a difference of MT gene G-210A polymorphism in type 2 diabetes in women, no difference in men.