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. 1993 Nov;110(3):1105–1111. doi: 10.1111/j.1476-5381.1993.tb13928.x

Impaired sensory-motor nerve function in the isolated mesenteric arterial bed of streptozotocin-diabetic and ganglioside-treated streptozotocin-diabetic rats.

V Ralevic 1, A Belai 1, G Burnstock 1
PMCID: PMC2175833  PMID: 8298799

Abstract

1. Adult male Wistar rats were treated with streptozotocin (65 mg kg-1, i.p.) to induce diabetes. Subgroups of age-matched control and streptozotocin-treated rats were given daily injections of mixed brain bovine gangliosides (60 mg kg-1 body weight, i.p.). At eight weeks after treatment mesenteric arterial beds from rats in each of the four groups were isolated and perfused and the function of perivascular nerves (sympathetic and sensory-motor), endothelium and smooth muscle was assessed. 2. Values for basal tone of mesenteric beds from diabetic and diabetic-ganglioside rats were significantly lower than those of the control and control-ganglioside-treated rats. Perfusion pressures at basal tone were 25.55 +/- 0.8 (n = 11), 22.58 +/- 1.5 (n = 12), 28.42 +/- 1.6 (n = 12) and 30.67 +/- 1.9 (n = 12) mmHg for diabetic, diabetic-ganglioside, control and control-ganglioside-treated rats respectively. 3. There was no difference between the groups with respect to vasoconstrictor responses to sympathetic nerve stimulation, or to doses of noradrenaline. Vasoconstrictor responses to potassium chloride were also similar between the groups. 4. Perivascular nerve stimulation in the presence of the sympathetic blocker guanethidine (3 microM), with tone of the preparation raised with methoxamine (3-100 microM), elicited frequency-dependent vasodilatation of mesenteric arterial beds due to transmitter release from sensory-motor nerves. Sensory-motor nerve-induced vasodilator responses of mesenteric arterial beds from streptozotocin-diabetic and ganglioside-treated diabetic rats were significantly smaller than those of mesenteric beds from the controls (untreated and ganglioside-treated).(ABSTRACT TRUNCATED AT 250 WORDS)

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Selected References

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