Innate and Adaptive Immunity in Calcific Aortic Valve Disease

Area of Science:

• Cardiovascular Biology
• Immunology
• Translational Medicine

Background:

• Calcific aortic valve disease (CAVD) is the most common heart valve disorder, characterized by pathological mineralization of aortic valve leaflets.
• Ectopic mineralization in CAVD is intricately linked with both innate and adaptive immune responses.
• Fibrocalcific remodeling in CAVD is associated with activation of the NF-κB pathway.

Purpose of the Study:

• To review the intricate relationship between immune responses and the development of CAVD.
• To provide a translational perspective on the role of immunity in CAVD pathogenesis.
• To highlight the involvement of specific immune pathways and cellular components in CAVD.

Main Methods:

• Review of existing scientific literature on CAVD and immune system interactions.
• Analysis of studies investigating the roles of innate and adaptive immunity in CAVD.
• Examination of molecular pathways such as NF-κB and inflammatory mediators like TNF-α and IL-6.

Main Results:

• Increased expression of TNF-α and IL-6 in mineralized aortic valves promotes an osteogenic program.
• Activation of the innate immune response via Toll-like receptors by factors like oxidized lipids.
• Valve interstitial cells (VICs) produce leukotrienes, potentially amplifying inflammation.
• Evidence suggests an adaptive immune response is triggered during CAVD progression.

Conclusions:

• Immune system activation, involving both innate and adaptive mechanisms, is a key driver of CAVD.
• Specific inflammatory pathways and mediators play critical roles in valve mineralization.
• Understanding these immune links offers potential for novel translational therapeutic strategies for CAVD.