PMID- 31519572 OWN - NLM STAT- MEDLINE DCOM- 20190926 LR - 20190926 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 39 IP - 9 DP - 2019 Sep TI - Amphiregulin/epiregulin mRNA Expression and Primary Tumor Location in Colorectal Cancer. PG - 4729-4736 LID - 10.21873/anticanres.13655 [doi] AB - BACKGROUND/AIM: Amphiregulin (AREG) and epiregulin (EREG) mRNA expression levels are predictors of response to anti-EGFR antibody therapy. Left-sided colon cancer is more sensitive to anti-EGFR antibodies than right-sided, although the mechanism is unclear. The aim of this study was to determine the relationship between AREG, EREG mRNA expression levels and tumor location as well as the efficacy of anti-EGFR antibody agents. MATERIALS AND METHODS: Real-time PCR was used to assess AREG and EREG mRNA expression in metastatic colorectal cancer (CRC) samples from 153 patients. RESULTS: Among KRAS(wt) samples, high AREG expression (AREG(High)) was significantly more common in left-sided tumors than in right-sided. Among patients who received anti-EGFR antibody, response rates were significantly higher in AREG(High) than in AREG(Low) In the left-sided tumor group, overall survival was significantly longer in patients with high EREG levels than with low levels, whereas the right-sided tumor group showed no survival difference between them. CONCLUSION: AREG and EREG mRNA expression levels in left-sided CRC were higher than in right-sided tumors. This may help explain why left-sided CRC is more responsive to anti-EGFR antibodies. CI - Copyright(c) 2019, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Kuramochi, Hidekazu AU - Kuramochi H AD - Department of Chemotherapy, Yachiyo Medical Center, Tokyo Women's Medical University, Chiba, Japan kuramochi.hidekazu@twmu.ac.jp. FAU - Nakajima, G O AU - Nakajima GO AD - Department of Chemotherapy and Palliative Care, Tokyo Women's Medical University, Tokyo, Japan. FAU - Hayashi, Kazuhiko AU - Hayashi K AD - Department of Chemotherapy and Palliative Care, Tokyo Women's Medical University, Tokyo, Japan. FAU - Araida, Tatsuo AU - Araida T AD - Department of Surgery, Yachiyo Medical Center, Tokyo Women's Medical University, Chiba, Japan. FAU - Yamamoto, Masakazu AU - Yamamoto M AD - Department of Gastrointestinal Surgery, Tokyo Women's Medical University, Tokyo, Japan. LA - eng PT - Journal Article PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (AREG protein, human) RN - 0 (Amphiregulin) RN - 0 (Antineoplastic Agents, Immunological) RN - 0 (Epiregulin) RN - 0 (RNA, Messenger) RN - EC 3.6.5.2 (Proto-Oncogene Proteins p21(ras)) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Amphiregulin/*genetics MH - Antineoplastic Agents, Immunological/pharmacology MH - Cell Line, Tumor MH - Colorectal Neoplasms/*genetics/mortality/pathology MH - Epiregulin/*genetics MH - Female MH - *Gene Expression Regulation, Neoplastic MH - Humans MH - Male MH - Middle Aged MH - Neoplasm Metastasis MH - Neoplasm Staging MH - Organ Specificity/genetics MH - Prognosis MH - Proto-Oncogene Proteins p21(ras)/genetics MH - RNA, Messenger/*genetics OTO - NOTNLM OT - Amphiregulin (AREG) OT - anti-EGFR antibody OT - colorectal cancer OT - epiregulin (EREG) OT - tumor location EDAT- 2019/09/15 06:00 MHDA- 2019/09/27 06:00 CRDT- 2019/09/15 06:00 PHST- 2019/07/31 00:00 [received] PHST- 2019/08/15 00:00 [revised] PHST- 2019/08/16 00:00 [accepted] PHST- 2019/09/15 06:00 [entrez] PHST- 2019/09/15 06:00 [pubmed] PHST- 2019/09/27 06:00 [medline] AID - 39/9/4729 [pii] AID - 10.21873/anticanres.13655 [doi] PST - ppublish SO - Anticancer Res. 2019 Sep;39(9):4729-4736. doi: 10.21873/anticanres.13655.