|
CHANGES IN NITRIC OXIDE SYNTHASE ACTIVITY IN
PLATELETS FROM IDDM PATIENTS
L. Tokareva, N.Sybirna
Ivan Franko National University of L’viv,
Hrushevskoho st. 4, L’viv 79005, Ukraine
|
Human platelets contain the nitric oxide synthase which
catalyses the synthase NO from L-arginine. The effects of preincubation with
L-arginine and inhibitors of NOS (NG-nitro-L-arginine and
N-omega-methyl-L-arginine) were studied in platelets from healthy donors and
IDDM patiens. Changes in NOS activity were also determined. The nitrite (NO2) +
nitrate (NO3) levels were taken as an index of NO production and measured in
plasma. The NO synthase inhibitors caused increasing the aggregation activity
of platelets and decreasing of NO production.
|
Keywords: Nitric oxide production, nitrite, nitrate, nitric oxide
synthase, NG-nitro-Larginine, N-omega-methyl-L-arginine, diabetus mellitus.
|
|