Hypermethylation of HIC1 and aberrant expression of HIC1/SIRT1 contribute to papillary thyroid carcinoma
10.3760/cma.j.issn.1000-6699.2016.05.007
- VernacularTitle:HIC1基因启动子区甲基化和HIC1/SIRT1的异常表达与甲状腺乳头状癌的关系研究
- Author:
Liting ZHANG
;
Wenyi WU
;
Xingong LIN
;
Zhongxin HUANG
;
Zhaoyang WANG
;
Jianlong QIU
- Publication Type:Journal Article
- Keywords:
Hypermethylated in cancer 1;
Silent mating type information regulation 2 homolog 1;
Papillary thyroid carcinoma;
Methylation
- From:
Chinese Journal of Endocrinology and Metabolism
2016;32(5):386-390
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore promoter methylation of HIC1 gene and the expression of HIC1/SIRT1 related to the occurrence, development, and metastasis of papillary thyroid carcinoma. Methods Using Bisulfite sequencing PCR to analyze the promoter methylation of HIC1 gene. Using quantitative real-time PCR and Western blot to analyze expression differences of HIC1 and SIRT1 genes in tissues of papillary thyroid carcinoma(40 cases) and in adjacent normal thyroid(40 cases), of which datas were analyzed by statistics. Results The degree of HIC1 gene promoter methylation was significantly higher than that in adjacent normal tissues(P<0. 01). The degree of HIC1 gene promoter methylation in papillary thyroid carcinoma was related to lymph node metastasis, age, and the tumor-node-metastasis stages(P<0. 01). Compared with the expression of HIC1 mRNA and protein in adjacent normal thyroid tissue, that in papillary thyroid carcinoma was significantly lower(P<0. 01), while the expression of SIRT1 mRNA and protein in papillary thyroid carcinoma was significantly higher(P<0. 01). The lower expression of HIC1 mRNA and protein in the tumor tissues was related to the stage of lymph node metastasis, age, and the tumor-node-metastasis stages(P<0. 05). There was a strong negative correlation between the degree of HIC1 gene promoter methylation and expression of HIC1 in papillary thyroid carcinoma(P<0. 05). The expression of HIC1 mRNA and protein between that of SIRT1 also showed a strong negative correlation(P<0. 01). Conclusion Promoter hypermethylation of HIC1 and aberrant expression of HIC1/SIRT1 in papillary thyroid carcinoma may play a significant role in the oncogenesis and progress of papillary thyroid carcinoma. HIC1 is expected to become a new marker for prevention and treatment of papillary thyroid carcinoma.
