Objective To observe the clinical effects of Qi-tonifying and blood stasis-removing and detoxification therapy on DNA methylationase 3b( DNMT3b) in chronic atrophic gastritis rats with dysplasia. Methods60 SPF healthy male Wistar rats were randomly divided into modeling group( n = 50) and blank group( n = 10). After successful modeling,the remaining rats( n = 33) in modeling group were randomly divided into model group,vitacoenzyme group,Xiaopi granule group,11 rats in each group. The model group was treate...