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S-nitroso-n-acetylcysteine protects skeletal muscle against reperfusion injury

✍ Scribed by Kang Liu; Long-En Chen; Anthony V. Seaber; James R. Urbaniak

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
94 KB
Volume
18
Category
Article
ISSN
0738-1085

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✦ Synopsis

The effects of a nitric oxide (NO) donor on microcirculation and contractile function of reperfused skeletal muscle were studied. Rat cremaster muscles underwent 5 hours of ischemia and 90 minutes of reperfusion and were divided into two groups systemically infused with S-nitroso-N-acetylcysteine (SNAC, 100 nmol/min) and phosphate-buffered saline (PBS), respectively. The results showed that the vessels in the SNAC group had more rapid and complete recovery than that in controls. A significant difference was found from 10 to 40 minutes and at 90 minutes in 10-20-µm arterioles, from 10 to 90 minutes in 20-40-µm arterioles, and at 10 and 90 minutes in 40-70-µm arteries. When compared to controls, SNACtreated muscles showed larger fluorescein filling areas at 15, 30, 60, and 90 minutes and greater isometric tetanic contractile forces in response to stimulation frequencies of 40, 70, 100, and 120 Hz. The data indicate that supplementation of exogenous NO could effectively improve microcirculation and contractile function of skeletal muscle during early reperfusion.

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