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- W1966294597 abstract "Diabetes mellitus compromises nitric oxide (NO)-mediated endothelium-dependent relaxation of blood vessels, which has been linked to the excessive generation of reactive oxygen species. There are also deleterious effect on nitrergic innervation, contributing to autonomic neuropathy symptoms such as impotence and gastroporesis. Poly(ADP-ribose) polymerase (PARP) is a nuclear protein stimulated by DNA damage, caused, for example, by oxidative stress. Activation has been linked to impaired endothelial nitric oxide synthase (eNOS)-mediated vasodilation in experimental diabetes. There is no information on the potential role of PARP in nitrergic nerve dysfunction, therefore, the aim was to examine the effects of PARP inhibition, using 3-aminobenzamide (3-AB) on neurally mediated gastric fundus relaxation in streptozotocin-induced diabetic rats. Eight weeks of diabetes caused a 42.5% deficit in maximum relaxation of in vitro gastric fundus strips to electrical stimulation of the non-adrenergic non-cholinergic innervation. This was largely prevented or corrected (4 weeks of treatment following 4 weeks of untreated diabetes) by 3-AB. Diabetes also markedly attenuated the maintenance of relaxation responses to prolonged stimulation, and this was partially corrected by 3-AB treatment. Experiments in the presence of the NOS inhibitor, NG-nitro-l-arginine, and/or blockade of the co-transmitter, vasoactive intestinal polypeptide, by α-chymotrypsin, showed that the beneficial effects of 3-AB were primarily due to improved nitrergic neurotransmission. Thus, PARP plays an important role in defective nitrergic neurotransmission in experimental diabetes, which may have therapeutic implications for treatment of aspects of diabetic autonomic neuropathy." @default.
- W1966294597 created "2016-06-24" @default.
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- W1966294597 date "2006-12-01" @default.
- W1966294597 modified "2023-09-29" @default.
- W1966294597 title "Effects of poly(ADP-ribose) polymerase inhibition on dysfunction of non-adrenergic non-cholinergic neurotransmission in gastric fundus in diabetic rats" @default.
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- W1966294597 doi "https://doi.org/10.1016/j.niox.2006.03.003" @default.
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