• Title/Summary/Keyword: Anti-platelet

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Evaluation of the Antioxidant and Antiproliferative Properties of a Hot-water Extract from Gulfweed, Sargassum fulvellum

  • Kim, So Jung;Kang, Mingyeong;Lee, Taek-Kyun
    • Journal of Marine Bioscience and Biotechnology
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    • v.10 no.2
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    • pp.53-61
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    • 2018
  • Sargassum fulvellum (gulfweed) is a widespread seaweed in the coastal areas of northeast Asia. In the present study, we identified the phenolic compounds present in aqueous and ethanolic extracts of S. fulvellum and evaluated their antioxidative properties and their abilities to block cell proliferation using in vitro assays: antioxidant activity was assessed by using a DPPH assay and superoxide anion scavenging activity, anti-tyrosinase activity, and anti-proliferative activity were assessed using MTT and lactate dehydrogenase [LDH] assays in vascular smooth muscle cells. The hot-water ($65^{\circ}C$) extract had a higher phenol content than the ethanolic extract. The hot-water extract showed a statistically significant increase in free radical scavenging activity and a greater ability to reduce proliferation of vascular smooth muscle cells stimulated with platelet-derived growth factor-BB. Taken together, hot-water extracts of S. fulvellum may be an important source of antioxidative and antiproliferative agents.

Effect of different drying methods on anti-oxidation and anti-thrombosis activities of Salicornia europaea (함초의 건조방법에 따른 항산화 및 항혈전 활성의 변화)

  • Sung, Hwa-Jung;Kim, Deuk Hoi;Sohn, Ho-Yong
    • Food Science and Preservation
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    • v.24 no.5
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    • pp.658-665
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    • 2017
  • The current study was performed to investigate the changes of bio-activities of Salicornia europaea (SE) depending on the different dry methods. The ethanol extracts were prepared from the freeze-drying SE (FD), hot-air drying SE (HD), and shade drying SE (SD). Their anti-oxidant and anti-thrombosis activities were compared. The yields of ethanol extraction in FD, HD, and SD were 14.4, 13.2 and 11.9%, respectively. The highest contents of total polyphenol (4.6 mg/g) and total sugar (23.4 mg/g) were shown in FD, whereas, the highest content of reducing sugar (14.6 mg/g) was observed in HD. In anti-oxidation activity assay, the FD and HD showed similar radical scavenging activities and reducing power. However, in SD, nitrite scavenging activity and reducing power were severely decreased. In anti-coagulation activity assay, the thrombin time (TT), prothrombin time (PT) and activated partial thromboplastin time (aPTT) of FD, HD and SD did not show significant changes at 5 mg/mL concentration. But the HD at 7 mg/mL had strong inhibitions against thrombin and blood coagulation factors. The platelet aggregation and hemolysis activities were not affected by dry methods. Our results suggest that both FD and HD are effective to maintain the functional ingredient of SE, and HD is economic and efficient dry process for production of functional food.

A study on anti-thrombotic activity of Hwao-tang

  • Park Tae Woo;Park Won Hwan
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.16 no.1
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    • pp.181-185
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    • 2002
  • The thrombosis is the category of blood stasis. Blood stasis is a pathologicial state resulting from the reverse or impeded flow of blood in the body or the stagnation of blood flow in local parts as well as abnormal blood outside of the vessles which remains in the body and fails to disperse. Hwao-tang has been reported to have a hypolipidemic effect in patients with hypercholesterolemia, and in highcholesterol-induced experimental models. The present paper reports the effects of HOT on atherosclerosis using a spontaneous experimental model, Kurosawa and Kusanagi-hypercholesterolemic (KHC) rabbits. We have also investigated the pharmacological effect of extracts obtained from HOT on collagen-and ADP-induced blood platelet aggregation, thrombin-induced conversion of fibrinogen and fibrinolysis in in vitro experiments. In conclusion, the protection of extracts of Korean herbs' HOT on the ischemic infarction induced artificially might be involved to their inhibition of thrombotic action.

Eight Constitution Acupuncture Effect on Thrombocytopenia After Splenectomy at Idiopathic Thromobocytopenic Purpura as First Manifestation of Systemic Lupus Erythematosus Lupus (SLE환자에서 ITP 진단으로 비장적출술 후 혈소판감소를 팔체질침으로 호전시킨 치험례)

  • Seo, Yong-Won;Ko, Heung
    • Journal of Acupuncture Research
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    • v.23 no.4
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    • pp.219-224
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    • 2006
  • Idiopathic thrombocytopenic purpura(ITP) is characterized by the development of a specific anti-platelet autoantibody immune response mediating the development of thrombocytopenia. Systemic lupus erythematosus(SLE) is an autoimmune disease characterized by the production of a wide variety of autoantibodies. We experienced SLE patient whose initial symptoms were related to idiopathic thrombocytopenic purpura(ITP). She has a thrombocytopenia after Splenectomy and Steroid therapy on ITP and SLE. After she took Eight constitution Acupuncture treatment, thrombocytopenia has improved. We think Acupuncture will be effective treatment at autoimmune disease.

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Spontaneous Recanalization from Traumatic Internal Carotid Artery Occlusion

  • Kim, Young-Sung;Yoon, Seung-Hwan;Kim, Eun-Young;Park, Hyeon-Seon
    • Journal of Korean Neurosurgical Society
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    • v.42 no.2
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    • pp.125-128
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    • 2007
  • The incidence of spontaneous recanalization after traumatic internal carotid artery occlusion is very rare. We have experienced a case of spontaneous recanalization after a traumatic internal carotid artery occlusion. A 5-year-old boy developed contra-lateral hemiparesis and dysphasia after a blunt injury on the head and neck. He had a complete left internal carotid artery occlusion which was diagnosed through angiography. We treated the patient with an anti platelet agent and rehabilitation. Six months later, he regained motor power of right extremities, language ability, and revisualization of internal carotid artery on the follow-up magnetic angiography. We confirmed a recanalization of injured internal carotid artery on the conventional cerebral angiography which was performed one year later. We suggest conservative treatment with serial angiographic studies as a possible option of traumatic internal carotid artery occlusion even though there is hemodynamic instability.

Acute Myocardial Infarction after Embolic Occlusion of Left Anterior Descending Artery by Prosthetic Valve Thrombosis - Report of 1 case - (인공판막 혈전에 의한 좌전하행지 폐쇄 후 급성심근경색 -1예 보고-)

  • 김재현;임달수;오삼세;백만종;김종환;나찬영
    • Journal of Chest Surgery
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    • v.37 no.4
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    • pp.369-372
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    • 2004
  • Acute myocardial infarction due to coronary occlusion by emboli originating from the prosthetic valve thrombosis is very rare but fatal disease which needs immediate diagnosis and urgent treatment. We report a case of acute myocardial infarction after left anterior descending embolic occlusion in whom had previous mitral valve replacement. Redo valve replacement following the interventional catheterization and anti platelet therapy lead to successful results.

Naproxen-induced Immune Thrombocytopenia -A case report- (Naproxen에 의해 유발된 중증 면역성 혈소판 감소증 -증례보고-)

  • Kim, Cheol Kun;Jang, In Su;Lee, Jun Hak;Kwon, Young Eun;Park, Sang Chul
    • The Korean Journal of Pain
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    • v.19 no.2
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    • pp.285-287
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    • 2006
  • Hundreds of drugs have been implicated as the causes of antibody-mediated thrombocytopenia. Naproxen is a commonly used nonsteroidal anti-inflammatory drug, and it is generally considered to be safe with few hematological side effects such as thrombocytopenia. In this case, severe thrombocytopenia associated with petechia and epistaxis appeared after initiation of naproxen therapy in the 59-year-old man. We report here on a case of severe thrombocytopenia that was recognized at 10 days after the use of naproxen, and the patient rapidly recovered to a normal platelet count without bleeding symptoms or any complications, although immunoglobulin or steroid was not used.

Inhibition of Cyclooxygenase/Lipoxygenase from Human Platelets by Polyhydroxylated/Methoxylated Flavonoids Isolated from Medicinal Plants

  • You, Kun-Man;Jong, Hyon-Gun;Kim, Hyun-Pyo
    • Archives of Pharmacal Research
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    • v.22 no.1
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    • pp.18-24
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    • 1999
  • Various flavonoid derivatives were previously reported to possess the inhibitory activity on cyclooxygenase/lipoxygenase. And these properties of flavonoids might contribute to their anti-inflammatory activity in vivo. In this study, several polyhydroxylated/methoxylated flavonoid derivatives such as oroxylin A. wogonin, skullcapflavone II, tectorigenin and iristectorigenin A were isolated from the medicinal plants. these compounds were evaluated fro their inhibitory effects on cyclooxygenase/lipoxygenase from the homogenate of human platelets in vitro. It was found that isoflavones including daidzein and tectorigenin possessed the inhibitory activity on cycloooxygenase, although the potency of inhibition was far less than that of indomethacin. In addition, oroxylin A, baicalein and wogonin inhibited 12-lipoxygenase activity without affecting cyclooxygenase, which suggested that 5,6,7- or 5,7,8-trisubstitutions of A-ring of flavone gave favorable results. The IC50 values of oroxylin A and NDGA against 12-lipoxygenase were found to be 100 and 1.5 uM, respectively.

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A study on relation of angiogenesis and blood stagnation In cancer (암(癌)에서 신생혈관(新生血管) 형성(形成)과 혈어(血瘀)의 상관성(相關性)에 관(關)한 고찰(考察))

  • Cho, Chin-Ho;Son, Chang-Gyu;Cho, Chong-kwan
    • Journal of Haehwa Medicine
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    • v.9 no.2
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    • pp.241-250
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    • 2001
  • A study on relation of angiogenesis and blood stagnation in cancer was done, and the results were as follows. 1. Angiogenesis is a sequence of vascular proliferation and accomplished by regulation of anti-angiogenesis factor and indicating factor. These factors are secreted in the course of blood coagulation, inflammation, and regeneration. 2. Angiogenesis in cancer is a important action in growth of tumor and metastasis because it supply oxygen and nutrition. 3. The complicated processes, for example, platelet coagulation, action of coagulator factor & dissolution factor and interaction of variety factors are related to blood stasis and promoting blood circulation to remove blood stasis in oriental medicine. 4. Promoting blood circulation to remove blood stasis is expected to suppress angiogenesis, and we expect advanced study will be accomplished in future.

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Pharmacological and medical applications of Panax ginseng and ginsenosides: a review for use in cardiovascular diseases

  • Kim, Jong-Hoon
    • Journal of Ginseng Research
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    • v.42 no.3
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    • pp.264-269
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    • 2018
  • Panax ginseng, also called Asian or Korean ginseng, has long been traditionally used in Korea and China to treat various diseases. The major active ingredients of P. ginseng are ginsenosides, which have been shown to have a variety of therapeutic effects, including antioxidation, anti-inflammatory, vasorelaxation, antiallergic, antidiabetic, and anticancer. To date, approximately 40 ginsenoside components have been reported. Current research is concentrating on using a single ginseng compound, one of the ginsenosides, instead of the total ginseng compounds, to determine the mechanisms of ginseng and ginsenosides. Recent in vitro and in vivo results show that ginseng has beneficial effects on cardiac and vascular diseases through efficacy, including antioxidation, control of vasomotor function, modulation of ion channels and signal transduction, improvement of lipid profiles, adjustment of blood pressure, improvement in cardiac function, and reduction in platelet adhesion. This review aims to provide valuable information on the traditional uses of ginseng and ginsenosides, their therapeutic applications in animal models and humans, and the pharmacological action of ginseng and ginsenosides.