PMID- 27127175 OWN - NLM STAT- MEDLINE DCOM- 20171226 LR - 20220317 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 22 DP - 2016 May 31 TI - Monocarboxylate transporter 1 contributes to growth factor-induced tumor cell migration independent of transporter activity. PG - 32695-706 LID - 10.18632/oncotarget.9016 [doi] AB - Tumor progression to metastatic disease contributes to the vast majority of incurable cancer. Understanding the processes leading to advanced stage cancer is important for the development of future therapeutic strategies. Here, we establish a connection between tumor cell migration, a prerequisite to metastasis, and monocarboxylate transporter 1 (MCT1). MCT1 transporter activity is known to regulate aspects of tumor progression and, as such, is a clinically relevant target for treating cancer. Knockdown of MCT1 expression caused decreased hepatocyte growth factor (HGF)-induced as well as epidermal growth factor (EGF)-induced tumor cell scattering and wound healing. Western blot analysis suggested that MCT1 knockdown (KD) hinders signaling through the HGF receptor (c-Met) but not the EGF receptor. Exogenous, membrane-permeable MCT1 substrates were not able to rescue motility in MCT1 KD cells, nor was pharmacologic inhibition of MCT1 able to recapitulate decreased cell motility as seen with MCT1 KD cells, indicating transporter activity of MCT1 was dispensable for EGF- and HGF-induced motility. These results indicate MCT1 expression, independent of transporter activity, is required for growth factor-induced tumor cell motility. The findings presented herein suggest a novel function for MCT1 in tumor progression independent of its role as a monocarboxylate transporter. FAU - Gray, Alana L AU - Gray AL AD - Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, USA. AD - Feist-Weiller Cancer Center, Shreveport, LA, USA. FAU - Coleman, David T AU - Coleman DT AD - Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, USA. AD - Feist-Weiller Cancer Center, Shreveport, LA, USA. FAU - Shi, Runhua AU - Shi R AD - Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, USA. AD - Feist-Weiller Cancer Center, Shreveport, LA, USA. FAU - Cardelli, James A AU - Cardelli JA AD - Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, USA. AD - Feist-Weiller Cancer Center, Shreveport, LA, USA. LA - eng PT - Journal Article PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (Monocarboxylic Acid Transporters) RN - 0 (Muscle Proteins) RN - 0 (SLC16A4 protein, human) RN - 0 (Symporters) RN - 0 (monocarboxylate transport protein 1) RN - 33X04XA5AT (Lactic Acid) RN - 62229-50-9 (Epidermal Growth Factor) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - EC 2.7.10.1 (MET protein, human) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) SB - IM MH - Cell Line, Tumor MH - Cell Movement/*drug effects MH - Epidermal Growth Factor/*pharmacology MH - Gene Expression Regulation, Neoplastic MH - Hepatocyte Growth Factor/*pharmacology MH - Humans MH - Lactic Acid/metabolism MH - Monocarboxylic Acid Transporters/genetics/*metabolism MH - Muscle Proteins/genetics/metabolism MH - Neoplasm Invasiveness MH - Phosphorylation MH - Proto-Oncogene Proteins c-met/metabolism MH - RNA Interference MH - Signal Transduction MH - Symporters/genetics/*metabolism MH - Time Factors MH - Transfection PMC - PMC5078044 OTO - NOTNLM OT - EGF OT - HGF OT - MCT1 OT - cancer OT - motility COIS- The authors have no relevant conflicts of interest to disclose. EDAT- 2016/04/30 06:00 MHDA- 2017/12/27 06:00 PMCR- 2016/05/31 CRDT- 2016/04/30 06:00 PHST- 2016/01/26 00:00 [received] PHST- 2016/03/31 00:00 [accepted] PHST- 2016/04/30 06:00 [entrez] PHST- 2016/04/30 06:00 [pubmed] PHST- 2017/12/27 06:00 [medline] PHST- 2016/05/31 00:00 [pmc-release] AID - 9016 [pii] AID - 10.18632/oncotarget.9016 [doi] PST - ppublish SO - Oncotarget. 2016 May 31;7(22):32695-706. doi: 10.18632/oncotarget.9016.