Metabolic-Epigenetic Crosstalk in Takayasu Arteritis: The ANK2-MAVS-IL-8 Axis as a Novel Therapeutic Paradigm

Takayasu arteritis (TAK) is a refractory chronic vasculitis of the aorta and its major branches, characterized by unsatisfactory treatment responses and high relapse rates. This review synthesizes current evidence to propose and elaborate a novel pathogenic paradigm: a self-reinforcing "metabolism-epigenetics-inflammation" feedback loop that sustains chronic vascular inflammation in TAK. We detail how immunometabolic reprogramming in immune and vascular wall cells not only meets bioenergetic demands but also generates metabolites (e.g., acetyl-CoA, lactate) that serve as substrates or cofactors for epigenetic modifications. These modifications, in turn, lock in a persistent pro-inflammatory gene expression profile. A central focus is the dissection of the ANK2-MAVS-IL-8 axis, a critical link connecting genetic susceptibility (via ANK2 variants) through mitochondrial dysfunction to sustained, IL-8-driven vascular injury. Building on this mechanistic framework, the review explores the translational potential of emerging biomarker candidates (e.g., IL-8, specific methylation marks) and proposes stratified therapeutic strategies that target distinct nodes within this interactive network, including metabolic drivers, epigenetic stabilizers, and inflammatory effectors. Ultimately, this work provides an integrated conceptual and translational roadmap for advancing precision medicine in TAK.