title: RegIV expression showing specificity to gastrointestinal tract and its potential role in diagnosing digestive tract neuroendocrine tumor.
abstract: Regenerating gene IV (RegIV), a member of the regenerating gene family discovered in 2001, has been found to be involved in malignancy in several different organs including the stomach, colorectum, pancreas and prostate, but the overall expression profile of RegIV has not been reported. To learn more about RegIV, we evaluated its distribution by immunohistochemistry (IHC) in a total of 360 samples including 24 types of normal tissue, 40 benign and malignant lesions, and 18 neuroendocrine tumors. We found that in normal tissues, in addition to its relative specificity for the gastrointestinal tract, RegIV was detected in the adrenal gland and mammary gland. Among all the malignancies of various histological types under evaluation, RegIV was found mostly in adenocarcinomas. Studies on additional sets of colorectal tumor samples showed that RegIV expression was predominant in colorectal adenoma (87.5%) and peritumoral tissue (100%) but not in cancer tissue (30.8%). Among neuroendocrine tumors, RegIV had a relatively restricted expression to those of digestive system.
authors.affiliation: Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, China.
authors.forename: Feng-ying
authors.initials: FY
authors.lastname: Li
authors.forename: Xiao-bin
authors.initials: XB
authors.lastname: Ren
authors.forename: En-ping
authors.initials: EP
authors.lastname: Xu
authors.forename: Qiong
authors.initials: Q
authors.lastname: Huang
authors.forename: Hong-qiang
authors.initials: HQ
authors.lastname: Sheng
authors.forename: Bing-jian
authors.initials: BJ
authors.lastname: Lv
authors.forename: Mao-de
authors.initials: MD
authors.lastname: Lai
mesh_terms: D000230:Adenocarcinoma / Q000378:metabolism*; D014408:Biomarkers, Tumor / Q000378:metabolism*; D005260:Female; D041981:Gastrointestinal Tract / Q000378:metabolism*; D020869:Gene Expression Profiling; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D037181:Lectins, C-Type / Q000096:biosynthesis* / Q000502:physiology; D008297:Male; D018358:Neuroendocrine Tumors / Q000378:metabolism*; D000073718:Pancreatitis-Associated Proteins; D012680:Sensitivity and Specificity; D014018:Tissue Distribution
chemical_list: D014408:Biomarkers, Tumor; D037181:Lectins, C-Type; D000073718:Pancreatitis-Associated Proteins; C428528:REG4 protein, human