Characterization of the atrial natriuretic peptide system in the oviduct

Endocrinology
S H KimG Y Koh

Abstract

The atrial natriuretic peptide (ANP) gene is expressed in several extraatrial tissues in which ANP may be involved in the regulation of autocrine or paracrine functions. In the ovary, the synthesis of ANP, its binding sites, and a physiological role were found. The ANP system in the oviduct, however, is yet to be defined. The purpose of the present study was to determine whether the ANP system is present in the oviduct and then to define its function. The serial dilution curves of oviductal extracts in rat and rabbit were parallel to the standard curve of ANP. Molecular profiles using reverse phase HPLC indicated that the prohormone and processed circulating peptide were the main forms present. The immunoreactive ANP content of the oviduct was 27.07 +/- 4.41 pg/mg tissue wet wt (1.19 +/- 0.19 ng/oviduct; n = 10; at metestrus) in rats and 1.21 +/- 0.12 pg/mg tissue wet wt (0.15 +/- 0.01 ng/oviduct; n 12) in rabbits. In adult 4-day cycling rats, the immunoreactive ANP contents in oviducts had a cyclic change characterized by the lowest level at proestrus (14.59 +/- 3.24 pg/mg; n = 12). A distinct and strong ANP immunoreactivity was found in the mucosal layer of rat oviduct, and ANP messenger RNA was also detected in the oviduct b...Continue Reading

References

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Citations

May 16, 2002·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Suhn Hee KimKyung Woo Cho
Jan 25, 2000·American Journal of Physiology. Heart and Circulatory Physiology·S J LeeK W Cho
Sep 21, 2000·Experimental Eye Research·E S ChoK W Cho

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