title: A study of the role of Notch1 and JAG1 gene methylation in development of breast cancer.
abstract: This study is to explore the roles of gene methylation of Notch1 and JAG1 in development of invasive ductal carcinoma of breast. Quantitative analysis the DNA methylation levels of Notch1 and JAG1 gene by the MassARRAY method in invasive ductal carcinoma of breast (IDC; n = 89), atypical ductal hyperplasia of breast (ADH; n = 11), and ordinary ductal hyperplasia of breast (UDH; n = 20). The expressions of JAG1 and Notch1 protein in four breast tissues were detected by immunohistochemistry SP method. (1) Positive expression rates of Notch1 protein in IDC and DCIS were 88.7 % (79/89) and 70.0 % (14/20), respectively, which were significantly higher than the levels in ADH (36.0 %, 4/11) and UDH (25.0 %, 5/20; P < 0.05). Notch1 protein expression was significant positively correlated with lymph node metastasis, pathological grades, and TNM stages of IDC. (2) Positive expression rates of JAG1 protein in IDC and DCIS were 89.9 % (80/89) and 75.0 % (15/20), respectively, which were significantly higher than those of ADH (45.0 %, 5/11) and UDH (30.0 %, 6/20; P < 0.05). JAG1 protein expression was significant positive correlation with lymph node metastasis, pathological grades and TNM stages of IDC. There is an overall hypomethylation alteration of Notch1 and JAG gene in IDC, with corresponding over-expression of Notch1 and JAG1 protein. This inverse correlation shows that the alteration of protein expression results from hypomethylation oncogene Notch1 and JAG1, and this change may play an important role in occurrence and progression of breast cancer.
authors.affiliation: Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan, 430071, Hubei Province, People's Republic of China.
authors.forename: Huapeng
authors.initials: H
authors.lastname: Sun
authors.affiliation: Department of Hepatobiliary and Pancreatic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, Hubei Province, People's Republic of China.
authors.forename: Kun
authors.initials: K
authors.lastname: Li
authors.affiliation: Department of General Surgery, Renmin Hospital of Wuhan University, Wuhan, 430071, Hubei Province, People's Republic of China. 1459195529@qq.com.
authors.forename: Shiqiang
authors.initials: S
authors.lastname: Shen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001941:Breast Diseases / Q000235:genetics / Q000473:pathology; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000235:genetics* / Q000473:pathology; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000235:genetics* / Q000473:pathology; D018899:CpG Islands; D019175:DNA Methylation; D005260:Female; D006801:Humans; D006965:Hyperplasia / Q000473:pathology; D000072100:Jagged-1 Protein / Q000235:genetics* / Q000378:metabolism; D008207:Lymphatic Metastasis / Q000473:pathology; D008875:Middle Aged; D051881:Receptor, Notch1 / Q000235:genetics* / Q000378:metabolism; D055815:Young Adult
chemical_list: C000606273:JAG1 protein, human; D000072100:Jagged-1 Protein; C497761:NOTCH1 protein, human; D051881:Receptor, Notch1
keywords: Breast cancer; Intraductal proliferative lesions of lacteal gland; JAG1; MassARRAY; Methylation of DNA; Notch1