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Cardiac Immunology: A New Era for Immune Cells in the Heart

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Cell Biology and Translational Medicine, Volume 11

Part of the book series: Advances in Experimental Medicine and Biology ((CBTMED,volume 1312))

Abstract

The immune system is essential for the development and homeostasis of the human body. Our current understanding of the immune system on disease pathogenesis has drastically expanded over the last decade with the definition of additional non-canonical roles in various tissues. Recently, tissue-resident immune cells have become an important research topic for understanding their roles in the prevention, pathogenesis, and recovery from the diseases. Heart resident immune cells, particularly macrophage subtypes, and their characteristic morphology, distribution in the cardiac tissue, and transcriptional profile have been recently reported in the experimental animal models, unrevealing novel and unexpected roles in electrophysiological regulation of the heart both at the steady-state and diseased state. Immunological processes have been widely studied in both sterile cardiac disorders, such as myocardial infarction, autoimmune cardiac diseases, or infectious cardiac diseases, such as myocarditis, endocarditis, and acute rheumatic carditis. Following cardiac injury, innate and adaptive immunity have critical roles in pro- and anti-inflammatory processes. Heart resident immune cells not only provide defense against infectious diseases but also contribute to the homeostasis. In recent years, physiological changes and pathological processes were demonstrated to alter the abundance, distribution, polarization, and diversity of immune cells in the heart. Accumulating evidence indicates that cardiac remodeling is controlled by the complex crosstalk between cardiomyocytes and cardiac immune cells through the gap junctions, providing the ion flow to achieve synchronization and modulation of contractility. This review article aims to review the well-documented roles of both resident and recruited immune cell in the heart, as well as their recently uncovered unconventional roles in both cardiac homeostasis and cardiovascular diseases. We have mostly focused on studies on animal models used in preclinical research, underlying the need for further investigations in humans or in vitro human models. It may be foreseen that the further comprehensive investigations of cardiac immunology might harbor new therapeutic options for cardiac disorders that have tremendous medical potential.

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Abbreviations

APD:

Action potential duration

ATP:

Adenosine triphosphate

AVN:

Atrioventricular node

CCR:

C-C motif chemokine receptors

CD:

Cluster of differentiation

CXCL:

Chemokine (C-X-C motif) ligand

CXCR:

Chemokine (C-X-C motif) receptor

DAMPs:

Damage-associated molecular pattern

DC:

Dendritic cell

dsRNA:

Double strand RNA

ECM:

Extracellular matrix

GM-CSF:

Granulocyte-macrophage colony stimulating factor

hsCRP:

High sensitivity C-reactive protein

IL:

Interleukin

LDL-C:

Low-density lipoprotein cholesterol

LPS:

Lipopolysaccharide

LQTS:

Long QT Syndrome

LV:

Left ventricle

MCT :

Tryptase-positive mast cells

MCTC:

Tryptase- and chymase-positive mast cells

MHC:

Major histocompatibility complex

MPO:

Myeloperoxidase

NETs:

Neutrophil extracellular traps

NO:

Nitric oxide

ROS:

Reactive oxygen species

TGF:

Transforming growth factor

TNF-α:

Tumor necrosis factor-alpha

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Acknowledgements

Figures were created with BioRender. This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant No: 218S841.

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None.

Ethical Approval

The authors declare that this article does not contain any studies with human participants or animals.

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Correspondence to Esra Cagavi .

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Koc, A., Cagavi, E. (2020). Cardiac Immunology: A New Era for Immune Cells in the Heart. In: Turksen, K. (eds) Cell Biology and Translational Medicine, Volume 11. Advances in Experimental Medicine and Biology(), vol 1312. Springer, Cham. https://doi.org/10.1007/5584_2020_576

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