Microvesicles and exosomes in pulmonary hypertension

Abstract

Pulmonary hypertension is a serious disorder with a high morbidity and mortality rate. The juxtaposition of endothelial cells and smooth muscle cells maintains vascular homeostasis. Vascular injury results in endothelial dysfunction, leading to impaired vascular relaxation, cell proliferation, and altered immune and metabolic states. In addition, injury induces pulmonary arterial endothelium and other cells to release increased levels of extracellular vesicles, including exosomes and microparticles that may be involved in enhancing the proliferation of apoptosis-resistant smooth muscle cells. These extracellular vesicles carry proteins, lipids, RNA, miRNA, chemokines cytokines and modulate immune function, inflammation, embryogenesis, regenerative processes, and serve as intercellular messengers. Importantly, mesenchymal stem cells-derived extracellular vesicles exert inhibitory effects on inflammation and restore homeostasis. This article reviews the pathophysiological role of extracellular vesicles in pulmonary hypertension.

Keywords

Endothelial cells / extracellular vesicles / mesenchymal cells / pulmonary hypertension

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