National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)
1DP2HL163810-01
米国
American Heart Association
847236
米国
引用
ジャーナル: Structure / 年: 2025 タイトル: Structural and molecular homogeneity of ATTRv-T60A amyloid fibrils across patients and organs. 著者: Maria Del Carmen Fernandez-Ramirez / Binh A Nguyen / Shumaila Afrin / Virender Singh / Bret Evers / John M Shelton / Christian Lopez Escobar / Parker Bassett / Lanie Wang / Maja Pękała / ...著者: Maria Del Carmen Fernandez-Ramirez / Binh A Nguyen / Shumaila Afrin / Virender Singh / Bret Evers / John M Shelton / Christian Lopez Escobar / Parker Bassett / Lanie Wang / Maja Pękała / Yasmin Ahmed / Luis O Cabrera Hernandez / Rose Pedretti / Preeti Singh / Jacob Canepa / Aleksandra Wosztyl / Yang Li / David R Boyer / Qin Cao / Lorena Saelices / 要旨: Transthyretin amyloidosis is a systemic protein misfolding disorder with diverse clinical phenotypes, including cardiomyopathy, polyneuropathy, or a combination of both. While structural polymorphism ...Transthyretin amyloidosis is a systemic protein misfolding disorder with diverse clinical phenotypes, including cardiomyopathy, polyneuropathy, or a combination of both. While structural polymorphism of amyloid fibrils has been linked to disease heterogeneity in neurodegenerative disorders, its role in transthyretin amyloidosis remains unclear. Here, we used cryo-electron microscopy to analyze ex vivo fibrils extracted from the hearts of three patients carrying the T60A mutation, a variant associated with mixed cardiac and neuropathic symptoms. In one patient, we additionally examined fibrils from the thyroid, kidney, and liver. All fibrils across patients and tissues adopted a single morphology previously associated with cardiomyopathy. Complementary molecular analyses revealed high compositional homogeneity. Notably, we extracted fibrils from the liver, an organ considered fibril-free, with seeding capacity in vitro. These findings suggest structural homogeneity as a hallmark of cardiac and mixed phenotypes, and provide a mechanistic rationale for the transmission of amyloidosis following domino liver transplantation.