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[The associations of HLA-DQB1 gene with onset age and autoantibodies in type 1 diabetes]

Chang-li Liu, Ye-rong Yu, Hong Liu, Xiang-xun Zhang, Gui-zhi Zhao
Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics 2004, 21 (4): 368-71
15300636

OBJECTIVE: To evaluate the associations of human leukocyte antigen (HLA) DQB1 gene with onset age and autoantibodies in type 1 diabetes mellitus(T1DM) in Chinese Han population in Sichuan area.

METHODS: Forty-six type 1 diabetic patients and 52 healthy control subjects were involved in this study. HLA-DQB1 typing was performed by polymerase chain reaction-sequence specific primer(PCR-SSP). Glutamic acid decarboxylase antibody (GADA) and islet cell antibody (ICA) were qualitatively analyzed by enzyme linked immunosorbent assay (ELISA).

RESULTS: The positive rate of DQB1*0201 was higher in T1DM than in controls (OR=18, P<0.005), but those of DQB1*0601, *0602 were higher in controls than in T1DM(OR=0.07, 0.31 respectively, both P<0.05).The positive rate of DQB1*0602 in type 1 diabetic patients with onset age>or=20 years was higher than that in the patients with onset age <20 years (P<0.05). GADA was more frequent in DQB1*0201(+) patients than in DQB1*0201 (-) patients (P<0.025).

CONCLUSION: The findings show that DQB1*0201 is susceptible to T1DM, whereas DQB1*0601, *0602 are protective in Chinese Han population in Sichuan area. DQB1*0602 may delay the onset of T1DM. The positive rate of DQB1*0201 correlates positively with that of GADA.

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