Synergism between Angiotensin receptors ligands: Role of Angiotensin-(1-7) in modulating AT2 R agonist response on nitric oxide in kidney cells.

Pharmacology Research & Perspectives
Sanket Patel, Tahir Hussain

Abstract

Angiotensin-(1-7), an endogenous agonist for the MasR, has been shown to interact with ang-II AT1 R and AT2 R. Earlier we showed a physical and functional interaction between MasR and AT2 R in response to their respective agonists ang-(1-7) and C21. Moreover, ang-(1-7) is cardio-protective via AT1 R and alters ang-II function. Such complex nature of ang-(1-7) function is not clearly understood, particularly in relation to its functional interaction with these receptors. We tested how ang-(1-7) affects AT2 R function by utilizing HK-2 cells. The HK-2 cells were treated with a wide range of concentrations of angiotensin receptor agonists. The generation of NO• in response to agonists was determined as a readout and subjected to Bliss definition (δ score) to assess the nature of functional interaction between these receptors. Preincubation with ang-(1-7) followed by incubation with endogenous AT1 R/AT2 R agonist ang-II (δ = 162) or selective AT2 R agonist C21 (δ = 304) synergized NO• formation. The synergism was also observed when the order of incubation with ang-(1-7)/C21 was reversed (δ = 484), but not when the cells were simultaneously incubated with a mixture of ang-(1-7) and C21 (δ = 76). The synergism with nonpeptidic MasR a...Continue Reading

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Citations

Jul 9, 2021·British Journal of Pharmacology·Juliana Fabiana GregórioGiselle Santos Magalhães

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Methods Mentioned

BETA
competition binding

Software Mentioned

GraphPad prism
SynergyFinder
Expression Analysis

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