Abstract:Gray platelets initially described as lacking α granules also show thrombin-induced aggregation and release lower than normal. One of the possible explanation is a modified intracellular Ca2+ concentration which is involved in platelet activation. We then decided to investigate the relationship between the morphological abnormality and a possible regulation of platelet Ca2+ concentration.We isolated a platelet membrane fraction (100,000 g) enriched in intracellular membranes which actively sequesters Ca2+. Thi… Show more
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