• 동의생리병리학회지
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• 제23권5호
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• pp.980-985
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• 2009

The study was designed to test anti-platelet effect and find out anti-platelet mechanism of extract from Gamisopunghwalheol-tang in vitro. The extract was investigated for the inhibition against the aggregation of human platelet suspensions induced from collagen by aggregometer. And also the extract was investigated for the inhibition against the aggregation of human platelet suspensions who is taking aspirin or clopidogrel induced from collagen by aggregometer. In collagen-induced platelet aggregation test, the extract significantly inhibited collagen-induced platelet aggregation in a concentration-dependent manner(p<0.05). The extract significantly inhibited collagen-induced platelet aggregation of human platelet who is taking aspirin or clopidogrel ing 0 mg/ml concentration(p<0.05). And the extract inhibited more ingpatients who is taking aspirin. These results show that the extract from Gamisopunghwalheol-tang has anti-platelet aggregation effect.

• Food Science and Biotechnology
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• 제16권2호
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• pp.218-222
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• 2007

The anticoagulant properties of Cinnamomum cassia bark-derived materials were evaluated against platelet aggregation induced by arachidonic acid (AA), collagen, platelet activating factor (PAF), or thrombin, and these effects were then compared to those of three commercially available compounds (cinnamic acid, cinnamyl alcohol, and aspirin). The active constituent obtained from C. cassia barks was isolated by silica gel column chromatography and high pressure liquid chromatography (HPLC), and was characterized as trans-cinnamaldehyde by MS, $^1H-NMR$, $^{13}C-NMR$, and IR spectroscopy. With regard to 50% inhibitory concentration ($IC_{50}$) values, cinnamaldehyde was found to effectively inhibit platelet aggregation induced by AA ($IC_{50},\;43.2\;{\mu}M$) and collagen ($IC_{50},\;3.1\;{\mu}M$). By way of comparison, cinnamaldehyde proved to be a significantly more potent platelet inhibitor against platelet aggregation induced by collagen than aspirin. The effect exerted by cinnamaldehyde against platelet aggregation induced by AA was 1.2 times less than that of aspirin. These results indicate that cinnamaldehyde may prove useful as a lead compound for the inhibition of platelet aggregation induced by AA and collagen.

• 한국산학기술학회논문지
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• 제4권4호
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• pp.357-360
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• 2003

작약의 methanol 추출물은 혈소판 활성 실험에서 혈소판 응집에 대해 강한 억제를 보였다. 활성성분은 chromatography방법을 사용하여 정제하였고 NMR과 기존의 Data로 분석하였다. Compound 1b는 benzoyloxypaeoniflorin과 동일한 구조임을 확인하였으며. compound 2e는 작약의 주성분인 paeoniflorin과 동일한 화학구조를 가졌으며 , compound 3a의 분석결과 구조적 유사성은 있으나 동일한 구조식은 확인 할 수 없었지만 collagen에서 응집억제활성이 90％이상의 뛰어난 활성을 나타내어 benzoyloxypaeoniflorin과 유사하게 benzoyl 기가 다른 작용기로 치환되었거나 Rl group이 다른 작용기로 치환된 형태로 추측하였다. Paeoniflorin이 collagen보다 thrombin에서 강한 억제를 보이는 것은 Ca/sup 2＋/ chelate를 형성함으로 인해 calcium 대사산물이 파괴된 것으로 추측했다. Compound 3a는 paeoniflorin의 benzoyl 기에 있는 OH기나 paeoniflorin의 glycoside 5-carbon위치의 OH기 대신에 다른 작용기가 대사산물로의 역할을 수행했을 것으로 추정했다.

• 한국식품영양과학회지
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• 제34권9호
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• pp.1320-1324
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• 2005

식생활에서 쉽게 접하고, 다양한 생리 활성 물질을 함유하고 있는 국산콩에 대하여 품종별로 용매 추출하여 각 추출물에 대한 혈소판 응접에 미치는 영향과 혈소판 응집을 유도하는 collagen과 thrombin에 대한 응집 억제작용을 비교하였고, isoflavone 유도체의 함량 및 검정콩 종피 추출물이 혈소판 응집억제에 미치는 효과를 연구하였다. 국산콩 품종별 용매추출물 1 mg/mL을 collagen $2 {\mu}g/mL$과 thrombin 0.1unit/mL으로 유도한 혈소판 응집반응에 메탄올보다 부탄을 추출물에서 감한 응집억제 효과가 있는 것으로 나타났다. 또한 진품콩과 검정콩의 부탄을 추출물이 collagen에 대하여 각각 $94\%$와 $95\%$의 혈소판 응집 억제율이었고 검정콩이 thrombin에서도 $95\%$의 혈소판 응집억제작용을 나타내었다. 혈소판 응집 억제율이 가장 강한 진품콩과 검정콩의 iso-flavone 함량은 진품롱의 genistein과 daidzein 함량이 검정콩의 genistein과 daidzein의 함량보다 모두 3배 가량 높았다. 배당체인 genistin의 함량은 두 품종 모두 비 배당체인 gem stein과 daidzein 함량보다 높았으며, 총 isoflavone 함량에서도 진품콩이 검정콩보다 높은 함량이었다. Isoflavone 유도체의 혈소판 응집억제작용은 collagen으로 유도한 혈소판 응집 반응에서 $200 {\mu}g/mL$농도에서 genistein>daidzein>geni-stin 순으로 각각 $97\%,\;38\%,\;13\%$로 억제되었고, thrombin으로 유도한 혈소판 응집 반응에서는 약한 억제작용을 나타내었다. 검정콩 종피에서 메탄올 및 부탄올 추출물의 혈소판응집 억제작용은 collagen에서 각각 $86\%$와 $61\%$로 나타내었고, thrombin에서도 $36\%$와 $32\%$의 응집 억제작용을 보였다. 이상의 결과에서 진품콩과 검정콩의 혈소판 응집억제작용은 총 isoflavone 함량과 관련이 있으며, isoflavone 유도체 에서 -OH group이 3개인 genistein이 -OH group이 2개인 daizein보다 혈소판 응집억제작용이 강하며, 당이 결합된 genistin 배당체의 약한 응집억제작용은 -OH group 수와 배당체의 관련성을 보여주고 있는 것으로 시사되었다.

• 동의생리병리학회지
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• 제19권5호
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• pp.1391-1398
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• 2005

The anti-thrombic properties of the oriental herbal medicine Daejowhan(DJW, 大造丸) which consists of 11 kinds of herbs (indicated as ratio) of Rehmanniae Radix 24%, Hominis Placenta 5%, Testudinis Carapax 9%, Eucommiae Cortex 9%, Asparagi Radix 9%, Phellodendri Cortex 9%, Achyranthis Radix 7%, Liriopis Tuber 7%, Angelicae Sinensis Radix 7%, Ginseng Radix 5% and Schizandrae Fructus 3% were investigated. The water extracts from DJW inhibited Platelet-activating factor(PAF) induced platelet aggregation. DJW was extracted with methanol and further fractionated by ethylacetate. A 70% methanol extract showed a strong inhibition against PAF-induced aggregation in vitro and in vivo assays. The ethylacetate soluble fraction was shown to have inhibitory effect on PAF-induced platelet aggregation in vitro assay. The ethylacetate soluble fraction specially protected against the lethality of PAF, while verapamil did not afford any protection. These results indicate that the water extracts and alcoholic-fractions inhibit the action of PAF in vivo by an antagonistic effect on PAF, so that it may be useful in treating disorders caused by PAF, such as acute allergy, inflammation, asthma, gastrointestinal ulceration, toxic shock and so forth. DJW was investigated regarding its assumed anti-thrombic action on human platelets which was deduced from its ability to suppress Arachidonic acid(AA)-induced aggregation, exocytosis of ATP, and inhibition of Cyclooxygenase(COX) and Thromboxane synthase(TXS) activity. The latter two effects were estimated from the generation of Prostaglandin $E_2(PGE_2)$ and Thromboxane $A_2(TXA_2)$ respectively. Exogenously applied AA ($100{\mu}mol/{\ell}$) provoked a $89\%$ aggregation of platelets, the release of 14 pmol ATP, and the formation of either 225 pg $TXA_2$ or 45 pg $PGE_2$, each parameter being related to 106 platelets. An application of DJW 5 min before AA dose-dependently diminished aggregation, ATP-release and the synthesis of $TXA_2$ and $PGE_2$ with $IC_{50}$ values of 74, 108, 65, $72{\mu}g/m{\ell}$, respectively. The similarity of the $IC_{50}$ values suggest an inhibition of COX by DJW as primary target, thus suppressing the generation of $TXA_2$ which induces aggregation of platelets and exocytosis of ATP by its binding on $TXA_2$-receptors.

• 약학회지
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• 제38권2호
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• pp.191-196
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• 1994

Higenamine is a tetrahydroisoquinoline alkaloid which was isolated as a cardiotonic principle from Aconiti tuber. 1.v. injection of higenamine was reported to increase the cardiac output and heart rate and to decrease the blood pressure and the systemic vascular resistance presumably by stimulating the adrenergic ${\beta}-receptors$. The anti-platelet and anti-thrombotic effects of higenamine were investigated in this paper. Higenamine(0.5 mg/ml) showed mild inhibitory effect against collagen induced platelet aggregation in vitro and the inhibito교 effect was increased with the pre-incubation$(5{\sim}30\;min)$ of platelet rich plasma(PRP) with higenamine. With the 30 min incubation, the platelet aggregation was almost completely inhibited. And the oral administration of higenamine$(50{\sim}200\;mg/kg)$ enhanced the survival in the mouse model of thrombosis and that of endotoxic shock. The anti-thrombotic and anti-septic effects of higenamine thus appear to be due to the ${\beta}-agonistic$ and the anti-platelet effects of this compound.

• 대한한방내과학회지
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• 제31권4호
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• pp.714-721
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• 2010

Objective : The study was designed to test the anti-platelet effect of the extract Cheongpyesagan-tang and compare it with aspirin in vitro. Methods : The extract from Cheongpyesagan-tang was made by the pharmacy department of Kyung Hee Oriental Medical Hospital. The extract was investigated for inhibition against the collagen induced aggregation of human platelet suspensions on aggregometry. Aspirin and aspirin-Cheongpyesagan-tang were investigated together. Results : 1. In collagen induced human platelet aggregation test, the extract from Cheongpyesagan-tang significantly inhibited in concentration 30mg/ml (p<0.05), 40mg/ml, 50mg/ml (p<0.001) and the effect depended on concentration over 20mg/ml. 2. Aspirin and aspirin-Cheongpyesagan-tang inhibited collagen induced human platelet aggregation significantly (p<0.001). Aspirin-extract of Cheongpyesagan-tang inhibition rate was higher than aspirin only (p<0.05). Conclusions : The extract of Cheongpyesagan-tang has anti-platelet aggregation and synergic effect with aspirin on human platelet in vitro.

• 한국식품위생안전성학회지
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• 제11권2호
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• pp.77-82
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• 1996

Green tea catechins(GTC) were studied for its inhibitory effect on human platelet aggregation in vitro, for its antithrombotic effect in mice in viro, and bleeding and clotting time in rats. The catechins were isolated and purified from green tea, which were composed of (-)-epigallocatechin gallate, (-)-epigallocatechin, (-)epicatechin gallate and (-)-epicatechin, GTC produced a potent inhibition of human platelet aggregation in a dose-dependent manner against the stimulants such as ADP, collagen, epinephrine and ristocetin n vitro. GTC also prevented death due to the formation of pulmonary thrombosis by platelet aggregates in mice in a dose-de-pendent manner in viro. GTC increased the bleeding time, whole blood clotting time and plasma clotting time in rats, too. These results suggest that GTC is a promising antithrombotic agent.

• International Journal of Advanced Culture Technology
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• 제6권4호
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• pp.109-115
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• 2018

Garlic is a medicinal plant used throughout the world for its anti-inflammatory, antioxidant, and antiplatelet activities. Chitosan is a natural polysaccharide obtained from chitin, and derivatives of chitosan have been shown to inhibit platelet aggregation and adhesion. We hypothesized that fermented preparations of these products may possess stronger antiplatelet effects than the non-fermented forms owing to the increased bioavailability of the bioactive compounds produced during fermentation. Therefore, we compared these compounds via in vitro and ex vivo platelet aggregation assays by using standard light transmission aggregometry and ex vivo granule secretions from rat platelets. We found that fermented preparations exerted more potent and significant inhibition of platelet aggregation both in vitro and ex vivo. Likewise, ATP release from dense granules of platelets was also significantly inhibited in fermented preparation-treated rat platelets compared to that in non-fermented preparation-treated ones. We concluded that fermented preparations exerted more potent effects on platelet function both in vitro and ex vivo, possibly as a result of the increased bioavailability of active compounds produced during fermentation. We therefore suggest that fermented products may be potent therapeutics against platelet-related CVDs and can be used as antiplatelet and antithrombotic agents.

• 한국식품위생안전성학회지
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• 제19권3호
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• pp.161-166
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• 2004

We investigated the antiplatelet effect of a newly synthesized guanidine derivative KR-32558, a sodium-hydrogen exchanger-1 (NHE-1) inhibitor, together with the elucidation of the possible mechanisms of action. KR-32558 concentration -dependently inhibited the aggregation of washed rabbit platelets induced by collagen (10 ${\mu}g/ml$) with an $IC_{50}$ value of 85.9 ${\mu}M$, but with much weaker potency against aggregation induced by thapsigargin (0.5 ${\mu}M$) or A23187 (5 ${\mu}M$). And had no effect on platelet aggregation induced by arachidonic acid (100 ${\mu}M$), thrombin (0.05 U/ml) and U46619 (1 ${\mu}M$) up to 100 ${\mu}M$. KR-32558 completely inhibited the $[Ca^{2+}]_i$ mobilization induced by collagen at concentration of 100${\mu}iM$. Taken together, these observation suggest that KR-32558 selectively inhibited collagen-mediated platelet aggregation by blocking the cytoplasmic calcium mobilization in addition to NHE-1 inhibition.