title: Inhibitory effect of sulfur-containing compounds in Scorodocarpus borneensis Becc. on the aggregation of rabbit platelets.
abstract: The inhibitory effects of three pure compounds isolated from wood garlic, 2,4,5-trithiahexane (I), 2,4,5,7-tetrathiaoctane (II), and 2,4,5,7-tetrathiaoctane 2,2-dioxide (III), on rabbit platelet aggregation induced by collagen, arachidonic acid, U46619, ADP (adenosine 5'-diphosphate), PAF (platelet aggregating factor), and thrombin were studied in vitro. The anti-aggregating activity of 2,4,5,7-tetrathiaoctane 4,4-dioxide (IV) was also measured with collagen and arachidonic acid. I, II, III, and IV inhibited the platelet aggregation induced by all tested agonists. I, II, and III exhibited a stronger inhibitory effect against the thrombin-induced aggregation of GFP (gel-filtered platelets) than against the aggregation induced by the other agonists. Notably, the IC50 value for III was 4 microM, which is approximately 2.5 times stronger than MATS (methyl allyl trisulfide), a major anti-platelet compound isolated from garlic. In inhibiting collagen-induced aggregation, II was as potent as MATS and aspirin, with a marked disaggregation effect on the secondary aggregation by arachidonic acid, at the rate of 47.05%/min at a concentration of 10(-4) M. I, II, and III also suppressed U46619-induced aggregation. These results suggest that sulfur-containing compounds in wood garlic not only inhibit arachidonic acid metabolism but also suppress aggregation in association with the function of the platelet plasma membrane.
authors: Department of Nutrition and Food Science, Ochanomizu University, Tokyo, Japan.
authors: H
authors: H
authors: Lim
authors: K
authors: K
authors: Kubota
authors: A
authors: A
authors: Kobayashi
authors: T
authors: T
authors: Seki
authors: T
authors: T
authors: Ariga
mesh_terms: D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid / Q000494:pharmacology; D000244:Adenosine Diphosphate / Q000494:pharmacology; D000818:Animals; D016718:Arachidonic Acid / Q000494:pharmacology; D001241:Aspirin / Q000494:pharmacology; D001779:Blood Coagulation Factors / Q000494:pharmacology; D003094:Collagen / Q000494:pharmacology; D006490:Hemostatics / Q000494:pharmacology; D006586:Hexanes / Q000737:chemistry / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D009795:Octanes / Q000737:chemistry / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D010945:Plants, Edible / Q000737:chemistry*; D010972:Platelet Activating Factor; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D011817:Rabbits; D013457:Sulfur Compounds / Q000737:chemistry / Q000494:pharmacology*; D013917:Thrombin / Q000494:pharmacology; D014197:Trees; D014662:Vasoconstrictor Agents / Q000494:pharmacology
chemical_list: D001779:Blood Coagulation Factors; D006490:Hemostatics; D006586:Hexanes; D009795:Octanes; D010936:Plant Extracts; D010972:Platelet Activating Factor; D010975:Platelet Aggregation Inhibitors; D013457:Sulfur Compounds; D014662:Vasoconstrictor Agents; D016718:Arachidonic Acid; D000244:Adenosine Diphosphate; D019796:15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; D003094:Collagen; D013917:Thrombin; D001241:Aspirin