ABSTRACT: In transthyretin cardiac amyloidosis (ATTR-CA), misfolded transthyretin accumulates in the myocardium, leading to wall thickening and interstitial fibrosis. Recently published in vitro studies revealed direct effects of transthyretin on the structure, function, and gene expression of cardiac fibroblasts. Therefore, we hypothesized that biomarkers known to modulate myocardial remodeling might be clinically valuable in ATTR-CA and may improve risk stratification in ATTR-CA. To analyze this hypothesis, we evaluated 14 fibrosis-related biomarkers (EN-RAGE, IGFBP-1, -2, -3, -4, -6, FGF-23, MMP-2, -7, -9, -13, TIMP-2, -4, and RAGE-AGE) in 125 patients using Luminex multiplex assays. The study cohort consists of 14 asymptomatic gene carriers (ATTRv-asymp), 47 symptomatic hereditary (ATTRv-CA), 43
