Abstract
High concentration of atrial natriuretic peptide (99–126) (ANP) receptors were localized by quantitative autoradiography in superior cervical and stellate ganglia from young and adult Wistar Kyoto (WKY) rats. ANP increased cyclic GMP formation in stellate ganglia from adult rats. Both young and adult spontaneously hypertensive rats (SHR) had a much lower number of ANP receptors in the sympathetic ganglia. In spite of low receptor concentration, the cyclic GMP response to ANP in SHR was unchanged. These results suggest the existence of physiologically active ANP receptors in the rat sympathetic ganglia. These receptors may also be involved in the pathophysiology of spontaneous hypertension.
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