Fibroblast-mediated intercellular crosstalk in the healthy and diseased heart

Area of Science:

• Cardiovascular Biology
• Cellular Communication
• Cardiac Fibroblast Biology

Background:

• Cardiac fibroblasts are a major cell type in the heart, crucial for tissue structure and function.
• They secrete extracellular matrix and signaling factors, significantly shaping the cardiac microenvironment.
• Single-cell RNA sequencing reveals fibroblasts as primary sources of intercellular communication signals.

Purpose of the Study:

• To review current knowledge on cardiac fibroblast interactions in healthy, diseased, and aging hearts.
• To focus on interactions between fibroblasts and cardiomyocytes, endothelial cells, and immune cells.
• To highlight communication modes including paracrine, electrical, and exosomal signaling.

Main Methods:

• In silico analysis of single-cell RNA sequencing data.
• Literature review of existing research on cardiac fibroblast interactions.
• Focus on specific cell-cell communication pathways.

Main Results:

• Fibroblasts are identified as the predominant source of outgoing signals in the heart.
• These signals orchestrate cellular interactions vital for homeostasis.
• Dysregulated fibroblast signaling contributes to cardiac disease states.

Conclusions:

• Cardiac fibroblasts play pivotal roles in maintaining heart function and in the pathogenesis of cardiac diseases.
• Understanding fibroblast communication networks is essential for developing therapeutic strategies.
• Further research into paracrine, electrical, and exosomal interactions will elucidate fibroblast roles in cardiac health and aging.