PMID- 26298005 OWN - NLM STAT- MEDLINE DCOM- 20160119 LR - 20171116 IS - 1096-0333 (Electronic) IS - 0041-008X (Linking) VI - 288 IP - 3 DP - 2015 Nov 1 TI - Anti-inflammatory effects of methylthiouracil in vitro and in vivo. PG - 374-86 LID - S0041-008X(15)30061-2 [pii] LID - 10.1016/j.taap.2015.08.009 [doi] AB - The screening of bioactive compound libraries can be an effective approach for repositioning FDA-approved drugs or discovering new treatments for human diseases. Here, methylthiouracil (MTU), an antithyroid drug, was examined for its effects on lipopolysaccharide (LPS)-mediated vascular inflammatory responses. The anti-inflammatory activities of MTU were determined by measuring permeability, human neutrophil adhesion and migration, and activation of pro-inflammatory proteins in LPS-activated human umbilical vein endothelial cells and mice. We found that post-treatment with MTU inhibited LPS-induced barrier disruption, expression of cell adhesion molecules (CAMs), and adhesion/transendothelial migration of human neutrophils to human endothelial cells. MTU induced potent inhibition of LPS-induced endothelial cell protein C receptor (EPCR) shedding. It also suppressed LPS-induced hyperpermeability and neutrophil migration in vivo. Furthermore, MTU suppressed the production of tumor necrosis factor-alpha (TNF-alpha) and interleukin (IL)-6, and the activation of nuclear factor-kappaB (NF-kappaB) and extracellular regulated kinases (ERK) 1/2 by LPS. Moreover, post-treatment with MTU resulted in reduced LPS-induced lethal endotoxemia. These results suggest that MTU exerts anti-inflammatory effects by inhibiting hyperpermeability, expression of CAMs, and adhesion and migration of leukocytes, thereby endorsing its usefulness as a therapy for vascular inflammatory diseases. CI - Copyright (c) 2015 Elsevier Inc. All rights reserved. FAU - Ku, Sae-Kwang AU - Ku SK AD - Department of Anatomy and Histology, College of Korean Medicine, Daegu Haany University, Gyeongsan 712-715, Republic of Korea. FAU - Baek, Moon-Chang AU - Baek MC AD - Department of Molecular Medicine, CMRI, School of Medicine, Kyungpook National University, Daegu 700-422, Republic of Korea. Electronic address: mcbaek@knu.ac.kr. FAU - Bae, Jong-Sup AU - Bae JS AD - College of Pharmacy, CMRI, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 702-701, Republic of Korea. Electronic address: baejs@knu.ac.kr. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150820 PL - United States TA - Toxicol Appl Pharmacol JT - Toxicology and applied pharmacology JID - 0416575 RN - 0 (Anti-Inflammatory Agents) RN - 0 (Antigens, CD) RN - 0 (Antithyroid Agents) RN - 0 (Cell Adhesion Molecules) RN - 0 (Endothelial Protein C Receptor) RN - 0 (Interleukin-6) RN - 0 (Lipopolysaccharides) RN - 0 (NF-kappa B) RN - 0 (PROCR protein, human) RN - 0 (Receptors, Cell Surface) RN - 0 (TLR4 protein, human) RN - 0 (Toll-Like Receptor 4) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - QW24888U5F (Methylthiouracil) SB - IM MH - Animals MH - Anti-Inflammatory Agents/*pharmacology MH - Antigens, CD/genetics/metabolism MH - Antithyroid Agents/pharmacology MH - Cell Adhesion/drug effects MH - Cell Adhesion Molecules/*metabolism MH - Cell Movement/drug effects MH - Cell Survival/drug effects MH - Endothelial Protein C Receptor MH - Endotoxemia/drug therapy MH - Human Umbilical Vein Endothelial Cells/drug effects/metabolism MH - Humans MH - Interleukin-6/metabolism MH - Lipopolysaccharides/adverse effects MH - Male MH - Methylthiouracil/*pharmacology MH - Mice MH - Mice, Inbred C57BL MH - Mitogen-Activated Protein Kinase 1/genetics/metabolism MH - Mitogen-Activated Protein Kinase 3/genetics/metabolism MH - NF-kappa B/metabolism MH - Neutrophils/*drug effects/metabolism MH - Receptors, Cell Surface/genetics/metabolism MH - Toll-Like Receptor 4/genetics/metabolism MH - Tumor Necrosis Factor-alpha/metabolism OTO - NOTNLM OT - Barrier integrity OT - Drug repositioning OT - Lipopolysaccharide OT - Methylthiouracil EDAT- 2015/08/25 06:00 MHDA- 2016/01/20 06:00 CRDT- 2015/08/23 06:00 PHST- 2015/06/23 00:00 [received] PHST- 2015/07/25 00:00 [revised] PHST- 2015/08/14 00:00 [accepted] PHST- 2015/08/23 06:00 [entrez] PHST- 2015/08/25 06:00 [pubmed] PHST- 2016/01/20 06:00 [medline] AID - S0041-008X(15)30061-2 [pii] AID - 10.1016/j.taap.2015.08.009 [doi] PST - ppublish SO - Toxicol Appl Pharmacol. 2015 Nov 1;288(3):374-86. doi: 10.1016/j.taap.2015.08.009. Epub 2015 Aug 20.