ABSTRACT
Objective To study the correlation between vitamin D receptor(VDR)polymorphism and psoriasis in the Chinese patients.Methods VDR genotypes were determined by PCR-RFLP in 112unrelated psoriatic patients as well as 108unr elated healthy controls.Results AA and Bb genotypes were found to be ex-pressed more frequently in psoriatic patients(19.6%and 32.1%)than those in normal controls(7.4%and14.8%),respectively.However,no signifi cant correlation was identified between VDR polymorphismand sex,age at onset,family history of psoriasis in psoriatic patients.In addition,there was no significant difference in the fre-quency of A,a alleles and B,b alleles between normal controls and psoriatic patients.Conclusions There is a significant difference in VDR genotypes between psoriatic patients and normal controls.The presence of hom ozygote AA or heterozygote Bb might contribute to the susceptibility of psoriasis.