PMID- 26463583 OWN - NLM STAT- MEDLINE DCOM- 20161006 LR - 20211203 IS - 1872-8057 (Electronic) IS - 0303-7207 (Linking) VI - 419 DP - 2016 Jan 5 TI - Alpha lipoic acid inhibits proliferation and epithelial mesenchymal transition of thyroid cancer cells. PG - 113-23 LID - S0303-7207(15)30106-4 [pii] LID - 10.1016/j.mce.2015.10.005 [doi] AB - The naturally occurring short-chain fatty acid, alpha-lipoic acid (ALA) is a powerful antioxidant which is clinically used for treatment of diabetic neuropathy. Recent studies suggested the possibility of ALA as a potential anti-cancer agent, because it could activate adenosine monophosphate activated protein kinase (AMPK) and inhibit transforming growth factor-beta (TGFbeta) pathway. In this study, we evaluate the effects of ALA on thyroid cancer cell proliferation, migration and invasion. We performed in vitro cell proliferation analysis using BCPAP, HTH-83, CAL-62 and FTC-133 cells. ALA suppressed thyroid cancer cell proliferation through activation of AMPK and subsequent down-regulation of mammalian target of rapamycin (mTOR)-S6 signaling pathway. Low-dose ALA, which had minimal effects on cell proliferation, also decreased cell migration and invasion of BCPAP, CAL-62 and HTH-83 cells. ALA inhibited epithelial mesenchymal transition (EMT) evidently by increase of E-cadherin and decreases of activated beta-catenin, vimentin, snail, and twist in these cells. ALA suppressed TGFbeta production and inhibited induction of p-Smad2 and twist by TGFbeta1 or TGFbeta2. These findings indicate that ALA reduces cancer cell migration and invasion through suppression of TGFbeta production and inhibition of TGFbeta signaling pathways in thyroid cancer cells. ALA also significantly suppressed tumor growth in mouse xenograft model using BCPAP and FTC-133 cells. This is the first study to show anti-cancer effect of ALA on thyroid cancer cells. ALA could be a potential therapeutic agent for treatment of advanced thyroid cancer, possibly as an adjuvant therapy with other systemic therapeutic agents. CI - Copyright (c) 2015 Elsevier Ireland Ltd. All rights reserved. FAU - Jeon, Min Ji AU - Jeon MJ AD - Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea. FAU - Kim, Won Gu AU - Kim WG AD - Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea. FAU - Lim, Seonhee AU - Lim S AD - Asan Institute of Life Sciences, Seoul, South Korea. FAU - Choi, Hyun-Jeung AU - Choi HJ AD - Asan Institute of Life Sciences, Seoul, South Korea. FAU - Sim, Soyoung AU - Sim S AD - Asan Institute of Life Sciences, Seoul, South Korea. FAU - Kim, Tae Yong AU - Kim TY AD - Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea. FAU - Shong, Young Kee AU - Shong YK AD - Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea. FAU - Kim, Won Bae AU - Kim WB AD - Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea. Electronic address: kimwb@amc.seoul.kr. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20151014 PL - Ireland TA - Mol Cell Endocrinol JT - Molecular and cellular endocrinology JID - 7500844 RN - 0 (Antineoplastic Agents) RN - 0 (Transforming Growth Factor beta) RN - 73Y7P0K73Y (Thioctic Acid) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.31 (AMP-Activated Protein Kinases) SB - IM MH - AMP-Activated Protein Kinases/genetics/metabolism MH - Animals MH - Antineoplastic Agents/*administration & dosage/pharmacology MH - Cell Line, Tumor MH - Cell Movement/drug effects MH - Cell Proliferation/drug effects MH - Epithelial-Mesenchymal Transition/*drug effects MH - Female MH - Gene Expression Regulation, Neoplastic/drug effects MH - Humans MH - Mice MH - Signal Transduction/drug effects MH - TOR Serine-Threonine Kinases/genetics/metabolism MH - Thioctic Acid/*administration & dosage/pharmacology MH - Thyroid Neoplasms/*drug therapy/genetics/metabolism MH - Transforming Growth Factor beta/genetics/metabolism MH - Xenograft Model Antitumor Assays OTO - NOTNLM OT - Alpha lipoic acid OT - Epithelial-mesenchymal transition OT - Transforming growth factor beta EDAT- 2015/10/16 06:00 MHDA- 2016/10/08 06:00 CRDT- 2015/10/15 06:00 PHST- 2015/04/03 00:00 [received] PHST- 2015/08/31 00:00 [revised] PHST- 2015/10/06 00:00 [accepted] PHST- 2015/10/15 06:00 [entrez] PHST- 2015/10/16 06:00 [pubmed] PHST- 2016/10/08 06:00 [medline] AID - S0303-7207(15)30106-4 [pii] AID - 10.1016/j.mce.2015.10.005 [doi] PST - ppublish SO - Mol Cell Endocrinol. 2016 Jan 5;419:113-23. doi: 10.1016/j.mce.2015.10.005. Epub 2015 Oct 14.