PMID- 31485602 OWN - NLM STAT- MEDLINE DCOM- 20200203 LR - 20200203 IS - 1791-2423 (Electronic) IS - 1019-6439 (Linking) VI - 55 IP - 4 DP - 2019 Oct TI - Secreted amphiregulin promotes vincristine resistance in oral squamous cell carcinoma. PG - 949-959 LID - 10.3892/ijo.2019.4866 [doi] AB - Oral squamous cell carcinoma (OSCC) is the most common type of oral cancer. Despite advances in surgery, radiotherapy and chemotherapy, the overall 5‑year survival rate of patients with OSCC has not significantly improved. In addition, the prognosis of patients with advanced‑stage OSCC remains poor. Therefore, it is necessary to develop novel therapeutic modalities. Vincristine (VCR), a naturally occurring vinca alkaloid, is a classical microtubule‑destabilizing agent and is widely used in the treatment of a number of cancers. Despite the proven antitumor benefits of VCR treatment, one of the major reasons for the failure of treatment is drug resistance. Changes in the tumor microenvironment are responsible for cross‑talk between cells, which may facilitate drug resistance in cancers; secreted proteins may promote communication between cancer cells to induce the development of resistance. To identify the secreted proteins involved in VCR resistance, conditioned media was obtained, and an antibody array was conducted to screen a comprehensive secretion profile between VCR‑resistant (SAS‑VCR) and parental (SAS) OSCC cell lines. The results showed that amphiregulin (AREG) was highly expressed and secreted in SAS‑VCR cells. Pretreatment with exogenous recombinant AREG markedly increased drug resistance against VCR in OSCC cells, as assessed by an MTT assay. Colony formation, MTT and western blot assays were performed to investigate the effects of AREG knockdown on VCR sensitivity. The results indicated that AREG expression can regulate VCR resistance in OSCC cells; overexpression of AREG increased VCR resistance in parental cells, whereas AREG knockdown decreased the VCR resistance of resistant cells. In addition, it was also demonstrated that the glycogen synthase kinase‑3beta pathway may be involved in AREG‑induced VCR resistance. These findings may provide rationale to combine VCR with blockade of AREG‑related pathways for the effective treatment of OSCC. FAU - Hsieh, Ming-Ju AU - Hsieh MJ AD - Oral Cancer Research Center, Changhua Christian Hospital, Changhua 500, Taiwan, R.O.C. FAU - Chen, Yin-Hong AU - Chen YH AD - Department of Otorhinolaryngology‑Head and Neck Surgery, Changhua Christian Hospital, Changhua 500, Taiwan, R.O.C. FAU - Lee, I-Neng AU - Lee IN AD - Department of Medical Research, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan, R.O.C. FAU - Huang, Cheng AU - Huang C AD - Department of Biotechnology and Laboratory Science in Medicine, National Yang‑Ming University, Taipei 112, Taiwan, R.O.C. FAU - Ku, Yu-Ju AU - Ku YJ AD - The Center for General Education of China Medical University, China Medical University, Taichung 404, Taiwan, R.O.C. FAU - Chen, Jui-Chieh AU - Chen JC AD - Department of Biochemical Science and Technology, National Chiayi University, Chiayi 60004, Taiwan, R.O.C. LA - eng PT - Journal Article DEP - 20190830 PL - Greece TA - Int J Oncol JT - International journal of oncology JID - 9306042 RN - 0 (AREG protein, human) RN - 0 (Amphiregulin) RN - 0 (Antineoplastic Agents) RN - 0 (Culture Media, Conditioned) RN - 5J49Q6B70F (Vincristine) RN - EC 2.7.11.1 (GSK3B protein, human) RN - EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta) SB - IM MH - Amphiregulin/genetics/*metabolism MH - Antineoplastic Agents/pharmacology MH - Carcinoma, Squamous Cell/drug therapy/genetics/*metabolism MH - Cell Line, Tumor MH - Culture Media, Conditioned/pharmacology MH - *Drug Resistance, Neoplasm MH - Gene Expression Regulation, Neoplastic MH - Gene Knockdown Techniques MH - Glycogen Synthase Kinase 3 beta/metabolism MH - Humans MH - Mouth Neoplasms/drug therapy/genetics/*metabolism MH - Prognosis MH - Signal Transduction MH - Up-Regulation MH - Vincristine/pharmacology EDAT- 2019/09/06 06:00 MHDA- 2020/02/06 06:00 CRDT- 2019/09/06 06:00 PHST- 2019/02/27 00:00 [received] PHST- 2019/08/01 00:00 [accepted] PHST- 2019/09/06 06:00 [pubmed] PHST- 2020/02/06 06:00 [medline] PHST- 2019/09/06 06:00 [entrez] AID - 10.3892/ijo.2019.4866 [doi] PST - ppublish SO - Int J Oncol. 2019 Oct;55(4):949-959. doi: 10.3892/ijo.2019.4866. Epub 2019 Aug 30.