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Cardiac nonmyocytes in the hub of cardiac hypertrophy

Takehiro Kamo1, Hiroshi Akazawa1, Issei Komuro1

  • 1From the Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan (T.K., H.A., I.K.); and Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Chiyoda-ku, Tokyo, Japan (H.A., I.K.).

Circulation Research
|June 20, 2015
PubMed

Insights

Nonmyocytes, crucial heart cells, actively drive cardiac hypertrophy through cell-to-cell communication. Understanding these interactions is key to developing new treatments for this condition.

Area of Science:

  • Cardiovascular Biology
  • Cellular Signaling
  • Cardiac Pathophysiology

Background:

  • Cardiac hypertrophy involves complex multicellular changes including cardiomyocyte growth, angiogenesis, fibrosis, and inflammation.
  • The heart comprises myocytes and nonmyocytes (fibroblasts, vascular cells, blood cells) that communicate via autocrine/paracrine mediators.
  • Nonmyocytes are increasingly recognized for their active role in cardiac hypertrophy development.

Purpose of the Study:

  • To review recent advancements in understanding the role of nonmyocytes in cardiac hypertrophy.
  • To highlight the significance of nonmyocytes as a central hub for initiating cardiac hypertrophy.
  • To emphasize noncontact communication via diffusible factors between cardiomyocytes and nonmyocytes.

Main Methods:

  • Literature review of recent research on cardiac hypertrophy and nonmyocyte function.
  • Analysis of studies focusing on intercellular communication in the heart.
  • Synthesis of findings on diffusible factors mediating cardiomyocyte-nonmyocyte interactions.

Main Results:

  • Nonmyocytes play a critical role in the induction and progression of cardiac hypertrophy.
  • Noncontact communication, mediated by diffusible factors, is a significant mechanism in this process.
  • Understanding these cellular crosstalks provides insights into the multicellular nature of cardiac hypertrophy.

Conclusions:

  • Nonmyocytes are pivotal in cardiac hypertrophy, acting as a hub for disease induction.
  • Intercellular communication, particularly noncontact signaling, is fundamental to cardiac hypertrophy.
  • Further research into nonmyocyte-cardiomyocyte interactions may reveal novel therapeutic targets.

Keywords:
angiogenesis factorcardiac myocytesendothelial cellsfibroblastsmacrophages

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