HLA-DQB1~* alleles and genetic susceptibility to type 1 diabetes mellitus

作     者：Youssef M Mosaad Fatma A Auf Shereen S Metwally Ashraf A Elsharkawy Amany K El-Hawary Rasha H Hassan Ziyad E Tawhid Farha A El-Chennawi 

作者机构：Unit of Clinical Immunology Department of Clinical Pathology Mansoura Faculty of Medi-cine Mansoura 35111 Egypt Unit of Pediatric Endocrinology and Diabetes Mansoura Faculty of Medicine Children’s Hospital Mansoura 35111 Egypt Unit of Pediatric Infectious Disease and Mal-nutrition Mansoura Faculty of Medicine Children’s Hospital Mansoura 35111 Egypt 

出 版 物：《World Journal of Diabetes》 (世界糖尿病杂志（英文版）（电子版）)

年 卷 期：2012年第3卷第8期

页      面：149-155页

学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学] 

主　　题：HLA-DQB1 Type 1 diabetes Egyptian Genetic susceptibility Children, Complication 

摘      要：AIM: To determine human leukocyte antigen (HLA)-DQB1 allele association with susceptibility to type 1 diabetes (T1D) and to clinical and laboratory findings. METHODS: This study was conducted on 85 unrelated Egyptian children with T1D recruited consecutively from the Pediatric Diabetes Endocrinology outpatients Clinic; Mansoura University Children’s Hospital, Egypt. Patient mean follow up period was 2.5 years. Patients were subdivided according to level of HbA1c (optimal/suboptimal control 8.5% and poor control ≥ 8.5%). The control group consisted of 113 unrelated age- and sex-matched healthy subjects without T1D or other autoimmune diseases. Genomic DNA extraction was done for all subjects using a DNA isolation kit. HLA-Class II-DQB1 allele typing was carried out with a polymerase chain reaction-sequence-specific oligonucleotide probe using a INNO-LiPA HLA-DQB1 update kit. RESULTS: Significant differences were detected between Egyptian patients with T1D and control groups in the frequencies of DQB1*02 [44.4% vs 18.6%, corrected P value (Pc) 0.001] and DQB1*03 (41.2% vs 24.4%, Pc 0.001). Significant differences were also observed between control groups and T1D patients in the frequencies of DQB1*05 (14.6% vs 7.2%, P = 0.029) and DQB1*06 (34.1% vs 7.2%, P 0.001). However, after correction for multiple comparisons, the significance was retained for HLA-DQB1*06 (Pc 0.001) but lost for HLA-DQB1*05. HLA-DQB1*0201, *0202, *030201 were positively associated with T1D (Pc = 0.014, Pc 0.001, and Pc 0.001 respectively), while HLA-DQB1*060101 was negatively associated (Pc 0.001) with the condition. Although the HLA-DQB1 alleles 030101 and 050101 were significantly higher in controls (P = 0.016, P = 0.025 respectively), both of them lost statistical significance after correction of P value. The frequency of the HLA-DQB1 genotypes 02/02, 02/03, and 03/03 was higher in T1D patients, and the frequency of the genotypes 03/06, 05/06, and 06/06 was higher in controls,