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Adrenergic Receptors: β Subtype01:26

Adrenergic Receptors: β Subtype

β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
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α-Adrenoceptors
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Related Experiment Video

Updated: Jul 18, 2026

Multilevel Microdissection and Functional-Structural Profiling of Human Renal Arterial Branches
06:51

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Published on: September 5, 2025

Renin receptor expression in human adipose tissue.

Vincent Achard1, Sandrine Boullu-Ciocca, Raoul Desbriere

  • 1Inserm UMR 626, Faculté de Médecine, 27 Boulevard Jean Moulin, 13385 Marseille cedex 5, France.

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|January 2, 2007
PubMed
Summary

The renin receptor (RenR) is found in human fat tissue and is functional, increasing angiotensin I generation. RenR expression is higher in visceral fat, suggesting a role in obesity and cardiovascular issues.

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Area of Science:

  • Endocrinology
  • Cardiovascular Biology
  • Adipose Tissue Biology

Background:

  • Adipose tissue synthesizes components of the renin-angiotensin system.
  • The renin receptor (RenR) enhances renin's efficiency in generating angiotensin I.
  • RenR is localized to the stromal portion of human adipose tissue.

Purpose of the Study:

  • To investigate the synthesis, localization, and function of RenR in human adipose tissue.
  • To determine RenR's role in adipose tissue differentiation and renin-angiotensin system activity.
  • To examine RenR expression in visceral versus subcutaneous adipose tissue and its association with obesity.

Main Methods:

  • Immunohistochemistry and Western blotting to detect RenR in human adipose tissue and cell cultures.
  • Primary culture of human stromal cells and 3T3-L1 preadipocytes.
  • Analysis of RenR mRNA and protein levels during adipocyte differentiation.
  • Measurement of angiotensin I generation and ERK 1/2 phosphorylation in response to renin.
  • Comparison of RenR expression in visceral and subcutaneous adipose tissue from lean and obese patients.

Main Results:

  • RenR is synthesized in the stromal portion of human adipose tissue and localized to the cell periphery.
  • RenR protein expression decreases during stromal cell differentiation, regulated post-transcriptionally.
  • Adipose RenR is functional, increasing angiotensin I generation and activating intracellular signaling pathways (ERK 1/2).
  • RenR expression is significantly increased in visceral adipose tissue compared to subcutaneous adipose tissue in both lean and obese individuals.
  • RenR colocalizes with plasminogen activator inhibitor type 1 in visceral adipose tissue.

Conclusions:

  • Adipose RenR is synthesized, localized, and functional within human adipose tissue.
  • RenR expression is upregulated in visceral adipose tissue, particularly in obesity.
  • These findings suggest RenR plays a role in obesity-related visceral adipose tissue accumulation and associated cardiovascular complications.