Atrial Natriuretic Peptide Regulation of Vertebrate Intestinal Ion Transport |
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Authors: | LORETZ CHRISTOPHER A |
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Institution: | Department of Biological Sciences, State University of New York at Buffalo Buffalo, New York 14260 |
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Abstract: | Atrial natriuretic peptide (ANP), in spite of its name, is synthesizedand secreted in vertebrates by both the atria and the ventriclesand also a number of extracardiac tissues. Likewise, the listof putative targets of ANP is large and includes, in additionto the kidney and vascular smooth muscle, the ion- and water-transportingintestine. Immunohistochemical staining of the intestine ofthe euryhaline marine goby Gillichthys mirabilis demonstratesthe presence of ANP-ergic neurons in the submucosa suggestingparacrine delivery to intestinal epithelial and smooth musclecells. ANP inhibits ion absorption across the goby intestine,supportingan osmoregulatory role for ANP. |
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