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Updated: May 27, 2025

Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles
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Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles

Published on: October 15, 2014

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TRP channels in cardiac mechano-redox coupling and diseases

Xinya Mi1, Di Wu1, Tomoya Ito1

  • 1Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.

Journal of Cardiology
|February 15, 2025
PubMed

Insights

Mechanical stretching of heart cells produces reactive oxygen species (ROS) to boost force. However, excessive ROS from NADPH oxidase (NOX) and TRP channels causes heart damage, suggesting new therapeutic targets.

Area of Science:

  • Cardiology
  • Molecular Biology
  • Biochemistry

Background:

  • Mechanical stretching of cardiomyocytes increases contractile force via reactive oxygen species (ROS).
  • Excessive ROS production leads to oxidative stress, myocardial atrophy, and cellular damage.
  • NADPH oxidase (NOX) enzymes are key producers of ROS, with Nox2 and Nox4 isoforms prominent in cardiomyocytes.

Purpose of the Study:

  • To review the mechanisms of ROS production by NOX enzymes in cardiomyocytes.
  • To explore the interaction between NOX proteins and transient receptor potential (TRP) channels.
  • To discuss the pathophysiological significance of TRP-NOX interactions in heart failure and potential therapeutic strategies.

Main Methods:

  • Literature review of studies on ROS signaling in cardiomyocytes.
  • Analysis of protein-protein interactions between TRP channels and NOX isoforms.
  • Examination of the role of TRP-NOX complexes in cardiac pathophysiology.

Main Results:

  • NOX enzymes, particularly Nox2 and Nox4, are critical for ROS generation in response to mechanical stress.
  • TRP channels form signaling complexes with NOX proteins, amplifying ROS production in the heart.
  • These interactions contribute to maladaptive cardiac remodeling and heart failure.

Conclusions:

  • TRP-NOX protein interactions represent a significant pathway for ROS signaling in the heart.
  • Targeting these interactions offers a promising therapeutic strategy for treating heart failure.
  • Further research into the specific mechanisms and therapeutic potential is warranted.
Keywords:
NADPH oxidaseProtein-protein interactionReactive oxygen speciesTransient receptor potential channel

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