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Abstract Title:

Inhibitory effect of hericenone B from Hericium erinaceus on collagen-induced platelet aggregation.

Abstract Source:

Phytomedicine. 2010 Dec 1 ;17(14):1082-5. Epub 2010 Jul 16. PMID: 20637576

Abstract Author(s):

Koichiro Mori, Haruhisa Kikuchi, Yutaro Obara, Masaya Iwashita, Yoshihito Azumi, Satomi Kinugasa, Satoshi Inatomi, Yoshiteru Oshima, Norimichi Nakahata

Article Affiliation:

Department of Cellular Signaling, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.

Abstract:

Platelet aggregation in the blood vessel causes thrombosis. Therefore, inhibitors of platelet aggregation promise to be preventive or therapeutic agents of various vascular diseases, including myocardial infarction and stroke. In the present study, we found that hericenone B had a strong anti-platelet activity and it might be a novel compound for antithrombotic therapy possessing a novel mechanism. Prior to this study, we examined anti-platelet aggregation activity of ethanol extracts of several species of mushrooms, and found that extract of Hericium erinaceus potently inhibited platelet aggregation induced by collagen. Therefore, we first fractionated the ethanol extract of H. erinaceus to identify the active substances. The anti-platelet activity of each fraction was determined using washed rabbit platelets. As a result, an active component was isolated and identified as hericenone B. Hericenone B selectively inhibited collagen-induced platelet aggregation, but it did not suppress the aggregation induced by U46619 (TXA₂ analogue), ADP, thrombin, or adrenaline. Furthermore, hericenone B did not inhibit arachidonic acid- or convulxin (GPVI agonist)-induced platelet aggregation. Therefore, hericenone B was considered to block collagen signaling from integrin α2/β1 to arachidonic acid release. Moreover, we foundthat collagen-induced aggregation was inhibited by hericenone B in human platelets, similar to in rabbit platelets.

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Sayer Ji
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