title: Mitogen-activated protein kinases pathway is involved in physiological testosterone-induced tissue factor pathway inhibitor expression in endothelial cells.
abstract: The mechanism of testosterone inducing the tissue factor pathway inhibitor (TFPI) in protecting against thrombosis is unknown. We aimed to elucidate the mechanisms involved in the induction by observing, in human umbilical vein endothelial cells (HUVECs), the phosphorylation of mitogen-activated protein kinases (MAPKs), a major cell signaling system. The level of testosterone regulating several signaling pathways, including extracellular signal-regulated kinases 1/2 (ERK1/2), c-Jun-N-terminal kinase (JNK), and p38 MAPK, was measured by western blot in HUVECs. ELISA and quantitative real-time reverse transcriptase-PCR were used to analyze TFPI expression after blocking ERK1/2 (with PD98059) or JNK (with SP600125) pathway in HUVECs. Testosterone-induced a rapid phosphorylation of ERK1/2, JNK and p38 MAPK in HUVECs, which could not be inhibited by androgen receptor antagonist flutamide. Blocking ERK1/2 or JNK pathway could significantly impair testosterone-induced TFPI at both translational and transcriptional levels in HUVECs. Testosterone at a physiological concentration may help to prevent thrombosis development by stimulating TFPI expression in HUVECs, partly through the ERK1/2 and JNK MAPK pathway.
authors.affiliation: The First Affiliated Hospital of Shantou University Medical College, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Jin
authors.forename: Da-yu
authors.initials: DY
authors.lastname: Wang
authors.forename: Yi-fang
authors.initials: YF
authors.lastname: Mei
authors.forename: Wen-bing
authors.initials: WB
authors.lastname: Qiu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhou
authors.forename: Dong-ming
authors.initials: DM
authors.lastname: Wang
authors.forename: Xue-rui
authors.initials: XR
authors.lastname: Tan
authors.forename: Yu-guang
authors.initials: YG
authors.lastname: Li
mesh_terms: D002478:Cells, Cultured; D042783:Endothelial Cells / Q000187:drug effects* / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D005786:Gene Expression Regulation / Q000187:drug effects*; D006801:Humans; D008074:Lipoproteins / Q000096:biosynthesis* / Q000235:genetics* / Q000378:metabolism; D020935:MAP Kinase Signaling System / Q000187:drug effects*; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D010766:Phosphorylation / Q000187:drug effects; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013739:Testosterone / Q000494:pharmacology*; D013927:Thrombosis / Q000517:prevention & control
chemical_list: D008074:Lipoproteins; D012333:RNA, Messenger; C051928:lipoprotein-associated coagulation inhibitor; D013739:Testosterone; D020928:Mitogen-Activated Protein Kinases