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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Effects of sympathetic nerve blockade on vasoconstrictive properties of nitric oxide synthase inhibition in sheep.

OBJECTIVE: Inhibition of nitric oxide synthase causes intense vasoconstriction. This effect is thought to be dependent on sympathetic nerve activity. Thus, we investigated the vasoconstrictive effects of the nitric oxide synthase inhibitor NG-nitro-L-arginine methyl ester (L-NAME) in sheep, in which a reversible sympathetic block was established by thoracic epidural anesthesia. METHODS: Sheep (n = 11) were surgically prepared for chronic study. After at least 5 days of recovery, L-NAME was continuously administered and hemodynamics were monitored. This was done in sheep with and without sympathetic blockade in randomized order. RESULTS: The vasoconstrictive effects of L-NAME were similar in sheep with and without sympathetic blockade. CONCLUSION: The obtained results suggest that the vasoconstrictive properties of nitric oxide synthase inhibitors are independent of sympathetic tone.[1]

References

  1. Effects of sympathetic nerve blockade on vasoconstrictive properties of nitric oxide synthase inhibition in sheep. Booke, M., Waurick, R., Van Aken, H., Bone, H.G., Meissner, A., Prien, T., Meyer, J. Cardiovasc. Res. (1997) [Pubmed]
 
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