title: Overexpression of Id-1 protein is a marker in colorectal cancer progression.
abstract: The inhibitor of differentiation/DNA binding 1 (Id-1), a negative regulator of basic helix-loop-helix transcription factors, plays an important role in the regulation of cell proliferation and differentiation. We examined the Id-1 expression by immunohistochemistry in 9 adenomas, 79 primary colorectal adenocarcinomas matched with 40 adjacent normal mucosa specimens and its relationship with clinicopathological factors. The Id-1 expression was increased in the carcinoma compared to the adjacent normal mucosa either in the unmatched and matched samples or to the adenoma. There was no significant difference in the Id-1 expression between normal mucosa and adenoma. The Id-1 expression of carcinoma was increased from Dukes' stages A to B, to C and to D. The cases with lymph node metastasis had a higher rate of a stronger Id-1 expression than those without lymph node metastasis. In conclusion, Id-1 overexpression plays an important role in colorectal cancer progression.
authors.affiliation: Department of General Surgery, The First Hospital of Hebei Medical University, Shijiazhuang, P.R. China.
authors.forename: Zeng-Ren
authors.initials: ZR
authors.lastname: Zhao
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Jiang
authors.forename: Ming-Wei
authors.initials: MW
authors.lastname: Wang
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Sun
mesh_terms: D000236:Adenoma / Q000209:etiology / Q000378:metabolism / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis / Q000378:metabolism*; D002277:Carcinoma / Q000209:etiology / Q000378:metabolism / Q000473:pathology*; D015179:Colorectal Neoplasms / Q000209:etiology / Q000378:metabolism / Q000473:pathology*; D018450:Disease Progression; D005260:Female; D006801:Humans; D051798:Inhibitor of Differentiation Protein 1 / Q000032:analysis / Q000378:metabolism*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D015854:Up-Regulation
chemical_list: D014408:Biomarkers, Tumor; C497453:ID1 protein, human; D051798:Inhibitor of Differentiation Protein 1