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[Endothelin, EDRF, CGRP].

Y Terada1, K Tomita, F Marumo

  • 1Second Department of Internal Medicine, Tokyo Medical and Dental University.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

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Endothelin-1 and nitric oxide (NO) are synthesized in the kidney, influencing renal function. Their receptors and related signaling molecules are present in various kidney structures, suggesting roles in modulating kidney function.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Physiology

Background:

  • Endothelin-1 (ET-1) is synthesized in the kidney and affects renal function.
  • Endothelium-derived relaxing factor (EDRF) is nitric oxide (NO), synthesized from L-arginine by NO synthase.
  • NO stimulates soluble guanylate cyclase, increasing cyclic guanosine monophosphate (cGMP) levels.

Purpose of the Study:

  • To investigate the localization of Endothelin-1 (ET-1) and its receptors (ETA and ETB) in the kidney.
  • To examine the distribution of nitric oxide (NO) synthase and soluble guanylate cyclase mRNA in renal tissues.
  • To understand the potential roles of the ET-1 and NO/cGMP systems in modulating renal function.

Main Methods:

  • Reverse transcription polymerase chain reaction (RT-PCR) was used to detect mRNA expression.

Related Experiment Videos

  • Localization of ET-1 mRNA, ETA receptor mRNA, ETB receptor mRNA, NO synthase mRNA, and soluble guanylate cyclase mRNA was analyzed.

    • Main Results:

    • ET-1 mRNA was found in glomeruli and inner medullary collecting ducts.
    • ETA receptor mRNA was detected in glomeruli, vasa recta, and arcuate arteries.
    • ETB receptor mRNA was mainly distributed in glomeruli and collecting ducts.
    • NO synthase mRNA was present in glomeruli and inner medulla.
    • Soluble guanylate cyclase mRNA was widely distributed along nephron segments.

    Conclusions:

    • The ET-1 system components are present in specific renal structures, suggesting localized functions.
    • The NO/cGMP system is widely distributed within the nephron, indicating a broad role in renal physiology.
    • Both ET-1 and NO/cGMP systems likely play significant roles in modulating kidney function.