Platelet hypersensitivity and intravascular coagulation in paroxysmal nocturnal hemoglobinuria.

The American Journal of Medicine
D SteinbergR W Colman

Abstract

The patient described had paroxysmal nocturnal hemoglobinuria associated with recurrent arterial as well as venous thrombosis. Study of platelet function revealed hypersensitivity to epinephrine, adenosine 5'phosphate (ADP) and collagen as judged by their ability to aggregate platelets as well as to release 14C serotonin. The release of total nucleotides was also markedly increased over normal with all aggregating agents. The abnormality was localized to the platelet since aggregation occurred when the patient's platelets were resuspended in normal plasma but not when normal platelets were incubated in the patient's plasma. Presumptive evidence for ongoing intravascular coagulation was an increase in fibrinogen derivatives of heavier molecular weight than the native protein presumably a result of thrombin action. However, factor XII was not activated and fibrinolysis was not increased. Complement component levels and antithrombin concentrations were also normal. The findings in this case suggest that hypersensitive platelets may contribute to the intravascular coagulation that is manifested by the increased incidence of thrombosis in patients with paroxysmal nocturnal hemoglobinuria.

References

Jun 1, 1974·The Journal of Clinical Investigation·C M ChesneyR W Colman
Apr 1, 1974·Thrombosis Research·E JakobsenP Kierulf
Sep 1, 1965·Immunochemistry·G ManciniJ F Heremans
Oct 1, 1958·British Journal of Haematology·M McKELLAR, J V DACIE
Dec 1, 1945·Annals of Internal Medicine·R C MANCHESTER

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Citations

Jan 1, 1984·Clinical Neurology and Neurosurgery·S P Donhowe, R P Lazaro
Jun 1, 1976·Thrombosis Research·A C CarvalhoR W Colman
Jan 1, 1979·CRC Critical Reviews in Clinical Laboratory Sciences·C F Arkin, A S Hartman
Jan 1, 1983·Critical Reviews in Clinical Laboratory Sciences·M L Tiffany
Jul 1, 1980·Scottish Medical Journal·M L StirlingM D Sumerling

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