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Thromb Haemost 1990; 63(02): 286-290
DOI: 10.1055/s-0038-1645211
Original Article
Schattauer GmbH Stuttgart

Extraction of Protein-Bound ATP and ADP from Human Platelets in Plasma

Christina Beurling-Harbury
The Division of Hematology, Department of Medicine, University of Illinois College of Medicine at Chicago, USA
,
Pehr B Harbury
The Division of Hematology, Department of Medicine, University of Illinois College of Medicine at Chicago, USA
› Author Affiliations
Further Information

Publication History

Received 17 March 1989

Accepted after revision 27 December 1989

Publication Date:
02 July 2018 (online)

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Summary

Actin is the major ATP and ADP binding protein in platelets, 0.9–1.3 nmol/108 cells, 50–70% in the unpolymerized state. The goal of these experiments was to develop a method for extracting all protein-bound ATP and ADP from undisturbed platelets in plasma. Extraction of actin-bound ADP is routine while extraction of actin-bound ATP from platelets in buffer has been unsuccessful. Prior to extraction the platelets were exposed to 14-C adenine, to label the metabolic and actin pools of ATP and ADP. The specific activity was determined from the actin-bound ADP in the 43% ethanol precipitate. Sequential ethanol and perchlorate extractions of platelet rich plasma, and the derived supernatants and precipitates were performed. ATP concentrations were determined with the luciferase assay, and radioactive nucleotides separated by TLC. A total of 1.18 nmol/108 cells of protein-bound ATP and ADP was recovered, 52% ATP (0.61 nmol). The recovery of protein-bound ADP was increased from 0.3 to 0.57 nmol/108 cells. This approach for the first time successfully recovered protein bound ATP and ADP from platelets in a concentration expected for actin.

 

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