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dc.contributor.authorW. Supanaranonden_US
dc.contributor.authorT. M.E. Davisen_US
dc.contributor.authorJ. Dawesen_US
dc.contributor.authorK. Silamuten_US
dc.contributor.authorN. Vilaiwannaen_US
dc.contributor.authorN. J. Whiteen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherJohn Radcliffe Hospitalen_US
dc.contributor.otherHeart Research Institute Australiaen_US
dc.contributor.otherPaholpolpayuhasena Hospitalen_US
dc.identifier.citationPlatelets. Vol.3, No.4 (1992), 195-200en_US
dc.description.abstractTo investigate in vivo platelet function in acute falciparum malaria plasma concentrations of βthromboglobulin (βTG), platelet factor 4 (PF4) and thrombospondin (TSP) were determined in 10 severely-ill Thai patients and 11 healthy volunteers. 8 patients recovered. At presentation, the platelet counts of the 10 patients were significantly lower (p < 0.025) than those of the controls, and a slight but significant increase (p < 0.05) in βTG/PF4 ratios in the patients suggested low-grade platelet activation. Presentation plasma βTG and PF4 concentrations did not differ from control values, probably due to the opposing effects of decreased circulating platelet mass and increased activation. By contrast, admission concentrations of TSP in the surviving patients were markedly lower (p < 0.001) than those of the controls; βTG/PF4 ratios, but not TSP levels, returned to normal during treatment. Hepatic dysfunction and oliguric renal failure probably contributed to a sustained increase in plasma β - TG and TSP in the 2 fatally ill patients, but associated elevated PF4 levels indicated concomitant platelet activation. Our results support the suggestion that in vivo platelet activation, which appears to be rapidly controlled by treatment, occurs in patients with severe, non-fatal falciparum malaria. TSP production, apparently from non-platelet sources, was decreased and/or its consumption was increased in these patients, perhaps by factors such as cytoadherence of infected erythrocytes and consequent endothelial damage. © 1992 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.en_US
dc.rightsMahidol Universityen_US
dc.titleIn-vivo platelet activation and anomalous thrombospondin levels in severe falciparum malariaen_US
Appears in Collections:Scopus 1991-2000

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