著者

久保 道徳 山崎 美保 松田 秀秋 我藤 伸樹 小谷 竜也

出版者

日本生薬学会

雑誌

生薬學雜誌 (ISSN:13403443)

巻号頁・発行日

vol.59, no.1, pp.22-27, 2005-02-20

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The effect of a fruit-juice concentrate of Japanese apricot (Japanese apricot concentrate, Ume-ekisu) on improving blood fluidity was examined. Whole blood passage time measured by a micro channel array flow analyzer (MC-FAN) of the Japanese apricot concentrate (200 mg/kg, p.o.)-treated rats was shorter than that of the non-treated control rats. Thus Japanese apricot concentrate showed an improving effect on rat blood fluidity. Furthermore, it was found that the Japanese apricot concentrate showed inhibitory effects on the collagen-, arachidonic acid- and ADP-induced platelet aggregations and on the thrombin-induced conversion of fibrinogen to fibrin. Citric acid and mumefural were identified as the main platelet aggregation inhibitory principles of Japanese apricot concentrate.

著者

大西 真里子 渡邉 尚子 岡村 勝正 村田 和也 野口 和真 松田 秀秋

出版者

日本生薬学会

雑誌

生薬學雜誌 : shoyakugaku zasshi : the Japanese journal of pharmacognosy (ISSN:13499114)

巻号頁・発行日

vol.66, no.2, pp.71-76, 2012-08-20

参考文献数

20

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Alopecia areata is one of the most common forms of alopecia and an effective treatment strategy has long been wanted. Several studies have shown that interferon-γ (IFN-γ) is implicated in the pathogenesis of alopecia areata. In this manuscript, we report on an in vitro screening method based on the restoration of cell proliferation against the cell growth inhibition induced by IFN-γ. The proliferation of the human squamous-cell-carcinoma cell line DJM-1 was suppressed by treatment of IFN-γ and the cytotoxicity was ameliorated by anti-human IFN-γ antibody. From the screening of ten extracts prepared from crude drugs related to treatments of alopecia and thermal burn, the extract of dried leaves of Ginkgo biloba (GB-ext) showed the most potent activity at 60.5% of inhibition at 100μg/mL among the samples tested. Furthermore, the seasonal transition manner of the rescue activities of GB-ext was investigated to reveal that the activity increased as the leaves grew. Surprisingly, the fallen leaves showed most potent activity. In addition, a preliminary experiment on the mechanism of the activity was performed using reverse transcription-polymerase chain reaction to demonstrate that GB-ext samples suppressed the expression of mRNA for HLA-DRA. These results suggest that the leaves of G. biloba can be a candidate material for the treatment of alopecia areata and the development of an effective screening method was achieved. The identification of the active principle and further investigation on the mechanism of the rescue activity are now underway.

著者

松田 秀秋 久保 道徳

出版者

公益社団法人日本薬学会

雑誌

薬学雑誌 (ISSN:00316903)

巻号頁・発行日

vol.103, no.12, pp.p1269-1277, 1983-12

被引用文献数

4

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The antithrombic activities of 70% methanol extract (I) obtained from Korean red ginseng (root of Panax ginseng C.A. MEYER) were evaluated in the models of experimental disseminated intravascular coagulation (DIC) induced by endotoxin or thrombin in rats, and in the in vitro models of blood platelet aggregation, agglutination of fibrinogen and activation of fibrinolytic system. In the coagulative system, I prevented the exchanges of values of clinical examination (blood platelet, fibrinogen and prothrombin time) at a dose of 500 mg/kg in rats on DIC induced by endotoxin or thrombin. I also inhibited the formation of fibrin thrombi in the renal glomeruli on the thrombin-induced DIC in rats. In the fibrinolytic system, I was found to show fibrinolytic activity in rats as determined by the euglobulin lysis time (ELT) assay. In the in vitro experiments, incubation of I in the plasminogen-containing fibrin plate promoted activation of urokinase action.