REGULATION OF PLATELET AGGREGATION BY NO UNDER THE IDDM. L.Tokareva, N. Sybirna, O.Kulachkovs'ky, M. Velykyi Ivan Franko National University of Lviv, Hrushevskyi st.4,UA-79005 Lviv, Ukraine e-mail: biolog@franco.Lviv.ua L-arginine has been shown to inhibit platelet aggregation under the IDDM. Human platelets contain an NO synthase which is activated when platelets are stimulated. The consequent generation of NO modulates platelet reactivity by increasing cyclic GMP. Key words: platelet agregation, ADP, nitric oxide, L-arginine/NO pathway, ultrastructure of platelets.
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