Inhibition of 2-P-mercaptophenyl-1,4- naphthoquinone on human platelet function
Journal
Life Sciences
Journal Volume
65
Journal Issue
1
Pages
45-53
Date Issued
1999
Author(s)
CHE-MING TENG
Abstract
As widely assumed, platelets and coagulation system heavily influence the pathogenesis and progression of cardiovascular diseases. Some 1,4- naphthoquinone derivatives, such as vitamin K3, have been reported to increase the synthesis of coagulation proteins. In this study, we examine how 2-p-mercaptophenyl -1,4-naphthoquinone (NTP), a newly synthesized 1,4- naphthoquinone derivative, affects the platelet function in humans. A tapered parallel plate chamber which provided a range of shear stress covering the entire physiological range in human circulation is used to assess platelet adhesiveness on fibrinogen coated-surface. In addition, platelet aggregation and thromboxane B2 (TXB2) production by inducers are evaluated by the turbidimetric method and enzyme immunoassay kit, respectively. Moreover, platelets [Ca2+](i) are measured using a dual-wavelength fluorescence spectrophotometer. Analysis results indicate that 1) NTP decreases the percentages of attached platelets at the locations in various shear stresses and the levels of platelet adhesiveness, denoted as the slope; 2) NTP can inhibit the platelet aggregation by ADP (2μM) and collagen (25μg/ml), and the IC50 are: 0.32 and 26.83 μg/ml, respectively; and 3) NTP markedly inhibits TXB2 formation and platelet [Ca2+](i) elevation caused by ADP and collagen. Therefore, we conclude that NIP may inhibit platelet adhesiveness on fibrinogen coated-surface, aggregability, [Ca2+](i), and thromboxane production, and that it may be used as an antiplatelet agent.
Subjects
2-p-mercaptophenyl-1,4-naphthoquinone; [Ca2+](i); Platelet
SDGs
Other Subjects
1,4 naphthoquinone derivative; fibrinogen; menadione; article; controlled study; human; human cell; mediator release; shear stress; thrombocyte; thrombocyte adhesiveness; thrombocyte aggregation; thrombocyte function; Adenosine Diphosphate; Blood Platelets; Calcium; Collagen; Fibrinogen; Humans; Inhibitory Concentration 50; Naphthoquinones; Platelet Adhesiveness; Platelet Aggregation; Platelet Aggregation Inhibitors; Spectrometry, Fluorescence; Thromboxane B2
Type
journal article