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Full-Text Articles in Medicine and Health Sciences

An Adrenal Beta-Arrestin 1-Mediated Signaling Pathway Underlies Angiotensin Ii-Induced Aldosterone Production In Vitro And In Vivo., Anastasios Lymperopoulos, Giuseppe Rengo, Carmela Zincarelli, Jihee Kim, Stephen Soltys, Walter J Koch Apr 2009

An Adrenal Beta-Arrestin 1-Mediated Signaling Pathway Underlies Angiotensin Ii-Induced Aldosterone Production In Vitro And In Vivo., Anastasios Lymperopoulos, Giuseppe Rengo, Carmela Zincarelli, Jihee Kim, Stephen Soltys, Walter J Koch

Center for Translational Medicine Faculty Papers

Aldosterone produces a multitude of effects in vivo, including promotion of postmyocardial infarction adverse cardiac remodeling and heart failure progression. It is produced and secreted by the adrenocortical zona glomerulosa (AZG) cells after angiotensin II (AngII) activation of AngII type 1 receptors (AT(1)Rs). Until now, the general consensus for AngII signaling to aldosterone production has been that it proceeds via activation of G(q/11)-proteins, to which the AT(1)R normally couples. Here, we describe a novel signaling pathway underlying this AT(1)R-dependent aldosterone production mediated by beta-arrestin-1 (betaarr1), a universal heptahelical receptor adapter/scaffolding protein. This pathway results in sustained ERK activation and subsequent …


Characterization Of Nprc And Its Binding Partners, Abdel A. Alli Jan 2009

Characterization Of Nprc And Its Binding Partners, Abdel A. Alli

USF Tampa Graduate Theses and Dissertations

The C type natriuretic peptide receptor (NPRC) also known as NPR3 is a widely expressed single transmembrane-spanning protein. NPRC functions as a homodimer at the cell surface for the metabolic clearance of a broad range of natriuretic peptides from circulation. The intracellular domain of NPRC is coupled to inhibitory G proteins and is involved in mediating signal transduction. In order to further elucidate the role of NPRC in signal transduction a proteomic approach was taken to identify putative protein binding partners for NPRC in different cell-types. An interrogation of the molecular association between NPRC and its identified protein binding partner(s) …