alexa Electrophysiological responses of angiotensin peptides on the rat isolated nodose ganglion.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Widdop RE, Krstew E, Jarrott B

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Abstract Previous autoradiographic studies have identified angiotensin II (AII) binding sites over the nodose ganglion and along the vagal afferent neurons. In the present study, we examined whether these binding sites are functional receptors by measuring d.c. potential changes by extracellular recording techniques in the rat isolated nodose ganglion preparation in response to superfusion of angiotensin peptides. It was found that AII, as well as AI and AIII elicited concentration-dependent depolarisation of the nodose ganglion. However, the amino terminal angiotensin heptapeptide, A(1-7), failed to evoke any significant response. The AII receptor antagonist, saralasin had no intrinsic activity, but caused a concentration-dependent blockade of AII-induced depolarisation. This study provides evidence for direct neuronal effects of angiotensin peptides on rat vagal afferent neurons. Moreover, this preparation is a relatively convenient one in which to study functional neuronal AII receptor mechanisms on central or peripheral terminals of vagal sensory neurons.
This article was published in Clin Exp Hypertens A and referenced in Journal of Diabetes & Metabolism

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