Abstract:
:Objective: CME-1 is a polysaccharide purified from the mycelia of medicinal mushroom Cordyceps sinensis, its molecular weight was determined to be 27.6 kDa by using nuclear magnetic resonance and gas chromatography-mass spectrometry. The initiation of arterial thromboses is relevant to various cardiovascular diseases (CVDs) and is believed to involve platelet activation. Our recent study exhibited that CME-1 has potent antiplatelet activity via the activation of adenylate cyclase/cyclic AMP ex vivo and in vivo. Methods: The aggregometry, and immunoblotting were used in this study. Results: In this study, the mechanisms of CME-1 in platelet activation is further investigated and found that CME-1 inhibited platelet aggregation as well as the ATP-release reaction, relative intracellular [Ca+2] mobilization, and the phosphorylation of phospholipase C (PLC)γ2 and protein kinase C (PKC) stimulated by collagen. CME-1 has no effects on inhibiting either convulxin, an agonist of glycoprotein VI, or aggretin, an agonist of integrin α2β1 stimulated platelet aggregation. Moreover, this compound markedly diminished thrombin and arachidonic acid (AA) induced phosphorylation of p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated kinase 2, c-Jun N-terminal kinase 1, and Akt. Treatment with SQ22536, an inhibitor of adenylate cyclase, markedly diminished the CME-1-mediated increasing of cyclic AMP level and reversed prostaglandin E1- or CME-1-mediated inhibition of platelet aggregation and p38 MAPK and Akt phosphorylation stimulated by thrombin or AA. Furthermore, phosphodiesterase activity of human platelets was not altered by CME-1. Conclusion: The crucial finding of this study is that the antiplatelet activity of CME-1 may initially inhibit the PLCγ2-PKC-p47 cascade, and inhibit PI3-kinase/Akt and MAPK phosphorylation through adenylate cyclase/cyclic AMP activation, then inhibit intracellular [Ca+2] mobilization, and, ultimately, inhibit platelet activation. The novel role of CME-1 in antiplatelet activity indicates that this compound exhibits high therapeutic potential for treating or preventing CVDs.
journal_name
Curr Pharm Biotechnoljournal_title
Current pharmaceutical biotechnologyauthors
Chang YI,Hsu WH,Lu WJ,Jayakumar T,Liao JC,Lin MJ,Wang SH,Geraldine P,Lin KH,Sheu JRsubject
Has Abstractpub_date
2015-03-03 00:00:00eissn
1389-2010issn
1873-4316pii
CPB-EPUB-65627pub_type
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journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201011314020010
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
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更新日期:2003-06-01 00:00:00
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abstract:BACKGROUND:Three clones of Cabernet Franc (Nos. 02, 010 and 012) were selected in the last phase of clonal selection in Serbia. Wines made from each clone were assessed for quality parameters and taste during five consecutive vintages (2008-2012) and compared to the standard. The wine quality was determined based on th...
journal_title:Current pharmaceutical biotechnology
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abstract:: ...
journal_title:Current pharmaceutical biotechnology
pub_type: 社论
doi:10.2174/138920101913190108104855
更新日期:2018-01-01 00:00:00
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journal_title:Current pharmaceutical biotechnology
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更新日期:2015-01-01 00:00:00
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journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
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更新日期:2005-08-01 00:00:00
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journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201021666201117122002
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abstract::Tryparedoxin peroxidase (TryP) is a key enzyme of the trypanothione-dependent metabolism for removal of oxidative stress in leishmania. These enzymes function as antioxidants through their peroxidase and peroxynitrite reductase activities. Inhibitors of this enzyme are presumed to be antilesihmania drugs and structura...
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更新日期:2009-09-01 00:00:00
abstract::3,4-Methylenedioxymethamphetamine (MDMA or ecstasy) is a worldwide illegally used amphetamine-derived designer drug known to be hepatotoxic to humans. Jaundice, hepatomegaly, centrilobular necrosis, hepatitis and fibrosis represent some of the adverse effects caused by MDMA in the liver. Although there is irrefutable ...
journal_title:Current pharmaceutical biotechnology
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abstract::Active or passive immunotherapy is expected to slow or stop the pathological process of Alzheimer's disease (AD). Immunotherapy for AD has demonstrated that targeting beta-amyloid (Aβ) or tau protein with vaccines or antibodies can reduce AD pathologies. Active anti-Aβ immunization for AD includes using AN1792 and sec...
journal_title:Current pharmaceutical biotechnology
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更新日期:2015-01-01 00:00:00
abstract:AIM OF THE STUDY:To assess tramadol and O-desmethyltramadol (M1) concentrations and their correlations with analgesia in patients with cancer pain. PATIENTS AND METHODS:Thirty opioid-naive patients with nociceptive pain intensity on VAS (visual analogue scale) > 40 received controlled-release tramadol as the first (15...
journal_title:Current pharmaceutical biotechnology
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journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
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更新日期:2018-01-01 00:00:00