Journal
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B
Volume 11, Issue 4, Pages 258-266Publisher
ZHEJIANG UNIV
DOI: 10.1631/jzus.B0900383
Keywords
Colorectal cancer; Expression profile; Neuroendocrine tumor; Regenerating gene IV (RegIV)
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Funding
- International Cooperation Program [2007C24009]
- Natural Foundation of Zhejiang Province [D2080011]
- Science and Technology Found of Zhejiang Province [2007C3020]
- Natural Science Foundation of Zhejiang Province, China [Y2090152]
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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.
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