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Related Concept Videos

Hormonal Regulation01:33

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
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Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Regulation of Expression Occurs at Multiple Steps02:24

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What is Gene Expression?

Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
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A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...

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Related Experiment Video

Updated: May 22, 2026

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis
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Control of renin [corrected] gene expression.

Sean T Glenn1, Craig A Jones, Kenneth W Gross

  • 1Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263-0001, USA. Sean.Glenn@roswellpark.org

Pflugers Archiv : European Journal of Physiology
|May 12, 2012
PubMed
Summary

This study identifies key regulatory regions and transcription factor binding sites in the Ren-1(c) gene promoter and enhancer, crucial for renin gene expression and blood pressure regulation.

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Area of Science:

  • Molecular biology
  • Genetics
  • Physiology

Background:

  • Renin is vital for blood pressure regulation and kidney development.
  • Renin gene transcription is complex and tissue-specific.
  • Previous studies identified promoter and enhancer regions for Ren-1(c) gene expression.

Purpose of the Study:

  • To identify and characterize the regulatory elements controlling renin gene transcription.
  • To investigate the role of transcription factor binding sites and signaling pathways in renin expression.

Main Methods:

  • Utilized the mouse As4.1 cell line, mimicking kidney juxtaglomerular cells.
  • Analyzed proximal promoter (-197 to -50 bp) and enhancer (-2,866 to -2,625 bp) regions of the Ren-1(c) gene.
  • Investigated transcription factor binding sites, including Hox, and responsiveness to signaling pathways (cAMP, retinoic acid, endothelin-1, cytokines).
  • Validated findings using in vivo models.

Main Results:

  • Identified a proximal promoter and an enhancer critical for Ren-1(c) gene expression.
  • Discovered transcription factor binding sites within these regions, including for Hox proteins.
  • Demonstrated enhancer responsiveness to cAMP, retinoic acid, endothelin-1, and cytokines.
  • Confirmed the in vivo relevance of identified regulatory elements.

Conclusions:

  • The identified promoter and enhancer regions, along with specific transcription factor binding sites and signaling pathway responsiveness, are essential for renin gene transcription.
  • These findings enhance our understanding of the complex regulation of renin expression in mammals.
  • This knowledge is critical for understanding blood pressure homeostasis and related diseases.