J Ginseng Res. 2016 Jan;40(1):76-85. doi: 10.1016/j.jgr.2015.05.004. Epub 2015 May 21.
Total saponin from Korean Red Ginseng inhibits binding of adhesive proteins to glycoprotein IIb/IIIa via phosphorylation of VASP (Ser(157)) and dephosphorylation of PI3K and Akt.
Journal of ginseng research
Hyuk-Woo Kwon, Jung-Hae Shin, Hyun-Jeong Cho, Man Hee Rhee, Hwa-Jin Park
Affiliations
Affiliations
- Department of Biomedical Laboratory Science, College of Biomedical Science and Engineering, Inje University, Gyungnam, Republic of Korea.
- Department of Biomedical Laboratory Science, College of Medical Science, Konyang University, Daejeon, Republic of Korea.
- Laboratory of Veterinary Physiology and Signaling, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea.
PMID: 26843825
PMCID: PMC4703804 DOI: 10.1016/j.jgr.2015.05.004
Abstract
BACKGROUND: Binding of adhesive proteins (i.e., fibrinogen, fibronectin, vitronectin) to platelet integrin glycoprotein IIb/IIIa (αIIb/β3) by various agonists (thrombin, collagen, adenosine diphosphate) involve in strength of thrombus. This study was carried out to evaluate the antiplatelet effect of total saponin from Korean Red Ginseng (KRG-TS) by investigating whether KRG-TS inhibits thrombin-induced binding of fibrinogen and fibronectin to αIIb/β3.
METHODS: We investigated the effect of KRG-TS on phosphorylation of vasodilator-stimulated phosphoprotein (VASP) and dephosphorylation of phosphatidylinositol 3-kinase (PI3K) and Akt, affecting binding of fibrinogen and fibronectin to αIIb/β3, and clot retraction.
RESULTS: KRG-TS had an antiplatelet effect by inhibiting the binding of fibrinogen and fibronectin to αIIb/β3 via phosphorylation of VASP (Ser(157)), and dephosphorylation of PI3K and Akt on thrombin-induced platelet aggregation. Moreover, A-kinase inhibitor Rp-8-Br-cyclic adenosine monophosphates (cAMPs) reduced KRG-TS-increased VASP (Ser(157)) phosphorylation, and increased KRG-TS-inhibited fibrinogen-, and fibronectin-binding to αIIb/β3. These findings indicate that KRG-TS interferes with the binding of fibrinogen and fibronectin to αIIb/β3 via cAMP-dependent phosphorylation of VASP (Ser(157)). In addition, KRG-TS decreased the rate of clot retraction, reflecting inhibition of αIIb/β3 activation. In this study, we clarified ginsenoside Ro (G-Ro) in KRG-TS inhibited thrombin-induced platelet aggregation via both inhibition of [Ca(2+)]i mobilization and increase of cAMP production.
CONCLUSION: These results strongly indicate that KRG-TS is a beneficial herbal substance inhibiting fibrinogen-, and fibronectin-binding to αIIb/β3, and clot retraction, and may prevent platelet αIIb/β3-mediated thrombotic disease. In addition, we demonstrate that G-Ro is a novel compound with antiplatelet characteristics of KRG-TS.
Keywords: PI3K/Akt; VASP (Ser157); adhesive protein; clot retraction; total saponin from Korean Red Ginseng
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