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Regulation of Utero-Placental Prorenin

  • A. M. Poisner
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 377)

Summary

Prorenin (Pro) is synthesized in a number of human utero-placental tissues, including chorion, decidua, villous placenta and probably mesenchymal cells. The release of Pro from these extra-renal tissues follows new protein synthesis and appears to utilize the constitutive secretory pathway. Unlike processing in the kidney, very little of the Pro is subsequently cleaved to the smaller product (active renin). Primary signals which regulate Pro include protein hormones and peptides (relaxin, endothelin, hCG), amines (epinephrine, norepinephrine, and related beta adrenergic agents), and eicosanoids. These agents increase the mRNA for prorenin at a time before peak secretory effects are noted. Other extracellular signals have negative regulatory effects. These include angiotensin, endotoxin and cyotkines (TNF-alpha and interleukin-1 B). There is also evidence that glucocorticoid receptor activation has an inhibitory effects on Pro release in placenta. Second messengers involved in the regulation of Pro include cyclic AMP and protein kinase A (PKA), protein kinase C (PKC), and calcium. The possible biological effect(s) of the extracellular Pro are unknown but may be due to direct generation of angiotensin I. Since angiotensin-peptides have a number of trophic effect on both vascular and non-vascular tissues, regulation of utero-placental Pro by autocrine, paracrine or endocrine signalling may be critical in normal fetal and/or placental development.

Keywords

Phorbol Myristate Acetate Renin Release Decidual Cell Renin Secretion Human Renin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • A. M. Poisner
    • 1
  1. 1.Department of PharmacologyUniversity of Kansas Medical CenterKansas CityUSA

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