Diabetes potentiates acetylcholine-induced relaxation in rabbit renal arteries.

The response of rabbit renal arteries to acetylcholine and its endothelial modulation in diabetes were investigated. Acetylcholine induced concentration-related endothelium-dependent relaxation of renal arteries that was significantly more potent in diabetic rabbits than in control rabbits. Pretreatment with N(G)-nitro-L-arginine (L-NOArg), indomethacin, or L-NOArg plus indomethacin induced partial inhibition of acetylcholine-induced relaxation. Inhibition induced by L-NOArg plus indomethacin was significantly higher in arteries from diabetic rabbits than in arteries from control rabbits. In renal arteries depolarised with KCl 30 mM and incubated with L-NOArg plus indomethacin, acetylcholine-induced relaxation was almost abolished in both groups of rabbits and this response was not different from that obtained in arteries without endothelium. Sodium nitroprusside induced concentration-dependent relaxation of renal arteries from control and diabetic rabbits without significant differences between the two groups of animals. These results suggest that diabetes potentiates the acetylcholine-induced relaxation in rabbit renal arteries. Increased release of nitric oxide and prostacyclin could be responsible for the enhanced relaxant potency of acetylcholine in diabetes.

• Publication year

  2001

• Venue

  European Journal of Pharmacology

• Publication date

  2001-03-16

• Fields of study

  Medicine

• Identifiers
  DOI 10.1016/S0014-2999(01)00832-9PMID 11275003
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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