Correlation between rs231775 polymorphism of CTLA4 gene and autoimmune thyroid disease of Uygur in Xinjiang Uygur Autonomous Region
10.3760/cma.j.cn231583-20200319-00047
- VernacularTitle:CTLA4基因rs231775位点多态性与新疆维吾尔族人群自身免疫性甲状腺疾病的相关性
- Author:
Aikebaier RENAGULI
1
;
Xinling WANG
;
Suli LI
;
Maimaitiming JIMILANMU
;
Jie ZHANG
;
Kaidi ZHANG
;
Alimu ADILA
;
Yanying GUO
Author Information
1. 新疆维吾尔自治区人民医院内分泌科，乌鲁木齐 830001
- From:
Chinese Journal of Endemiology
2020;39(12):866-872
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the correlation between rs231775 polymorphism of cytotoxic T lymphocyte-associated antigen 4 (CTLA4) gene and autoimmune thyroid disease (AITD) of Uygur in Xinjiang Uygur Autonomous Region.Methods:A total of 382 Uygur patients with AITD [including 328 Hashimoto's thyroiditis (HT) patients and 54 Graves' disease (GD) patients] diagnosed in the People's Hospital of Xinjiang Uygur Autonomous Region from January 2017 to December 2018 were selected as the case group, and 383 Uygur health physical examiners in the same period were selected as the control group. The whole blood genomic DNA of the study subjects was extracted, and the Sequenom-mass spectrometry analysis platform was used to determine the genotyping of CTLA4 gene single nucleotide polymorphism (SNP) locus rs231775 and analyze the genetic model, and the correlation between rs231775 polymorphism and AITD under different genetic models was compared. The logistic regression analysis model was used to analyze the influencing factors of AITD. And the thyroid function index of different genotype population was compared.Results:In the case group and the control group, the differences of CTLA4 gene rs231775 alleles (A: 41.88%, 49.35%; G: 58.12%, 50.65%) and genotype frequencies (AA: 17.80%, 23.24%; AG: 48.17%, 52.22%; GG: 34.03%, 24.54%) were statistically significant (χ 2=8.586, 9.260, P < 0.05). Compared with the control group, the genotype frequency of rs231775 in HT group, the alleles and genotype frequencies of rs231775 in GD group were significantly different (χ 2=5.997, 11.130, 10.210, P < 0.05). Under the additive and dominant models, the CTLA4 gene rs231775 was correlated with AITD [odds ratio ( OR)=0.67, 0.55, 0.63] and HT ( OR=0.69, 0.62, 0.67, P < 0.05); and correlated with GD under the additive, dominant and recessive genetic models ( OR=0.53, 0.23, 0.44, 0.34, P < 0.05). The logistic regression analysis showed that genotype, gender, age, thyroid stimulating hormone (TSH) and free thyroxine (FT 4) were independent influencing factors of AITD ( P < 0.05). Among all the subjects, the level of thyroglobulin antibody(TgAb) in the population with the recessive genotype (GG) at the rs231775 of the CTLA4 gene was higher than that in the dominant genotype (AA+AG) population ( P < 0.05). Conclusion:The CTLA4 gene rs231775 polymorphism is significantly related to AITD of Uygur in Xinjiang Uygur Autonomous Region, and the level of TgAb in GG genotype is higher than that in other genotypes.
