RNA Molecules That Could Help the Heart Repair Itself 2021

RNA Molecules That Could Help the Heart Repair Itself

2021 Scientific Review

Original Paper: “Non-coding RNAs in Cardiac Regeneration”

Yuan T., Krishnan J. Frontiers in Physiology • March 2021, Volume 12

The Challenge

The adult human heart has almost no ability to replace heart muscle cells (cardiomyocytes) after a heart attack or other serious injury. Scar tissue replaces lost cells, weakening the heart and potentially leading to heart failure. Finding ways to restart the heart’s own repair programs is a major goal of regenerative medicine.

What Are Non-coding RNAs?

Most of the genome does not code for proteins. The RNA molecules produced from these regions are called non-coding RNAs (ncRNAs). The main types discussed in this review are:

  • microRNAs (miRNAs) – short molecules that turn down the production of specific proteins
  • long non-coding RNAs (lncRNAs) – longer RNAs that can regulate genes in many different ways
  • circular RNAs (circRNAs) – circular forms that can act as sponges or regulators

How ncRNAs Influence Heart Repair

These molecules control several key processes:

  1. Cardiomyocyte proliferation – some miRNAs encourage adult heart cells to divide again; others keep them from dividing.
  2. Differentiation and reprogramming – certain ncRNAs help turn other cell types into heart-like cells.
  3. Cell survival – some protect heart cells from dying after injury.
  4. Overall tissue repair – by coordinating the above processes, ncRNAs can improve heart function after damage.

Therapeutic Potential

Because ncRNAs can be delivered as synthetic molecules (or blocked with complementary “antisense” molecules), they are attractive drug candidates. Researchers are exploring ways to use them to:

  • Stimulate remaining heart cells to divide
  • Improve the survival of heart cells after a heart attack
  • Enhance stem-cell or reprogramming approaches for heart repair

Bottom Line

Non-coding RNAs, especially microRNAs, long non-coding RNAs, and circular RNAs, strongly regulate the heart’s limited ability to repair itself. Modulating them offers a promising strategy for treating heart failure by encouraging true cardiac regeneration rather than just scar formation.

Source

Yuan T, Krishnan J. Non-coding RNAs in Cardiac Regeneration. Frontiers in Physiology. 2021;12:650566.

DOI: 10.3389/fphys.2021.650566

This summary was prepared in plain language for general understanding and does not replace the original scientific publication or medical advice.