PMID- 24703465 OWN - NLM STAT- MEDLINE DCOM- 20140730 LR - 20211021 IS - 1349-7006 (Electronic) IS - 1347-9032 (Print) IS - 1347-9032 (Linking) VI - 105 IP - 6 DP - 2014 Jun TI - MGr1-Ag/37LRP induces cell adhesion-mediated drug resistance through FAK/PI3K and MAPK pathway in gastric cancer. PG - 651-9 LID - 10.1111/cas.12414 [doi] AB - It is well known that tumor microenvironment plays a vital role in drug resistance and cell adhesion-mediated drug resistance (CAM-DR), a form of de novo drug resistance. In our previous study, we reported that MGr1-Ag/37LRP ligation-induced adhesion participated in protecting gastric cancer cells from a number of apoptotic stimuli caused by chemotherapeutic drugs. Further study suggested that MGr1-Ag could prompt CAM-DR through interaction with laminin. However, the MGr1-Ag-initiated intracellular signal transduction pathway is still unknown. In this study, our experimental results showed that gastric cancer MDR cell lines mediated CAM-DR through upregulation of Bcl-2 by MGr1-Ag interaction with laminin. Further study found that, as a receptor of ECM components, MGr1-Ag/37LRP may activate the downstream signal pathway PI3K/AKT and MAPK/ERK through interaction with phosphorylated FAK. Moreover, the sensitivity to chemotherapeutic drugs could be significantly enhanced by inhibiting MGr1-Ag/37LRP expression through mAbs, siRNA, and antisense oligonucleotide. According to these results, we concluded that the FAK/PI3K and MAPK signal pathway plays an important role in MGr1-Ag-mediated CAM-DR in gastric cancer. MGr1-Ag/37LRP might be a potential effective reversal target to MDR in gastric cancer. CI - (c) 2014 The Authors. Cancer Science published by Wiley Publishing Asia Pty Ltd on behalf of Japanese Cancer Association. FAU - Sun, Li AU - Sun L AD - State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China. FAU - Liu, Lili AU - Liu L FAU - Liu, Xiangqiang AU - Liu X FAU - Wang, Yafang AU - Wang Y FAU - Li, Mengbin AU - Li M FAU - Yao, Liping AU - Yao L FAU - Yang, Jianjun AU - Yang J FAU - Ji, Genlin AU - Ji G FAU - Guo, Changcun AU - Guo C FAU - Pan, Yanglin AU - Pan Y FAU - Liang, Shuhui AU - Liang S FAU - Wang, Biaoluo AU - Wang B FAU - Ding, Jie AU - Ding J FAU - Zhang, Hongwei AU - Zhang H FAU - Shi, Yongquan AU - Shi Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140512 PL - England TA - Cancer Sci JT - Cancer science JID - 101168776 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antigens, Neoplasm) RN - 0 (Laminin) RN - 0 (MGr1-antigen, human) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (RNA, Small Interfering) RN - 0 (RPSA protein, human) RN - 0 (Receptors, Laminin) RN - 0 (Ribosomal Proteins) RN - 5J49Q6B70F (Vincristine) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.10.2 (Focal Adhesion Kinase 1) RN - EC 2.7.10.2 (PTK2 protein, human) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) SB - IM MH - Animals MH - Antibodies, Monoclonal/immunology MH - Antigens, Neoplasm/genetics/*metabolism MH - Cell Adhesion MH - *Drug Resistance, Neoplasm MH - Focal Adhesion Kinase 1/metabolism MH - Humans MH - Laminin/metabolism MH - Male MH - Mice MH - Mice, Nude MH - Mitogen-Activated Protein Kinases/*metabolism MH - Phosphatidylinositol 3-Kinases/*metabolism MH - Proto-Oncogene Proteins c-bcl-2/biosynthesis MH - RNA Interference MH - RNA, Small Interfering MH - Receptors, Laminin/genetics/*metabolism MH - Ribosomal Proteins/genetics/*metabolism MH - Signal Transduction MH - Stomach Neoplasms/*drug therapy/pathology MH - Tumor Cells, Cultured MH - Tumor Microenvironment MH - Up-Regulation MH - Vincristine/pharmacology PMC - PMC4317895 OTO - NOTNLM OT - CAM-DR OT - FAK/PI3K OT - MAPK OT - MGr1-Ag/37LRP OT - gastric cancer EDAT- 2014/04/08 06:00 MHDA- 2014/07/31 06:00 PMCR- 2014/06/01 CRDT- 2014/04/08 06:00 PHST- 2014/02/11 00:00 [received] PHST- 2014/03/25 00:00 [revised] PHST- 2014/04/03 00:00 [accepted] PHST- 2014/04/08 06:00 [entrez] PHST- 2014/04/08 06:00 [pubmed] PHST- 2014/07/31 06:00 [medline] PHST- 2014/06/01 00:00 [pmc-release] AID - 10.1111/cas.12414 [doi] PST - ppublish SO - Cancer Sci. 2014 Jun;105(6):651-9. doi: 10.1111/cas.12414. Epub 2014 May 12.