Innate and adaptive immunity: the understudied driving force of heart valve disease

Area of Science:

• Cardiovascular Medicine
• Immunology
• Pathobiology

Background:

• Calcific aortic valve disease (CAVD) is a leading cause of valve disease in developed nations, affecting 2.5% of the population.
• Current treatments for CAVD do not halt or delay its progression, necessitating novel therapeutic strategies.
• CAVD is increasingly recognized as an active inflammatory process rather than a passive degenerative condition.

Purpose of the Study:

• To explore the critical role of the immune system in the pathogenesis and progression of calcific aortic valve disease.
• To highlight the need for a deeper understanding of immune mechanisms in CAVD to develop future treatments.

Main Methods:

• Review of current literature on the pathobiology of CAVD.
• Analysis of the involvement of both innate and adaptive immune systems in CAVD pathogenesis.
• Examination of the cellular composition of the aortic valve, including hematopoietic-derived cells and inflammatory infiltrates.

Main Results:

• The immune system, encompassing both innate and adaptive responses, plays a crucial role in CAVD pathogenesis and continuation.
• Inflammation leads to a significant increase in hematopoietic-derived cells within the valve, including macrophages and lymphocytes.
• The infiltration of immune cells promotes further inflammation, contributing to disease progression.

Conclusions:

• CAVD is an active inflammatory disease driven by complex immune mechanisms.
• Further research into the immune system's role is essential for developing effective treatments to control CAVD.
• Understanding immune cell dynamics within the valve is key to informing future therapeutic interventions for CAVD.