Genetic and functional insights into the fractal structure of the heart

Hannah V. Meyer, Timothy J.W. Dawes, Marta Serrani, Wenjia Bai, Paweł Tokarczuk, Jiashen Cai, Antonio de Marvao, Albert Henry, R. Thomas Lumbers, Jakob Gierten, Thomas Thumberger, Joachim Wittbrodt, James S. Ware, Daniel Rueckert, Paul M. Matthews, Sanjay K. Prasad, Maria L. Costantino, Stuart A. Cook, Ewan Birney, Declan P. O’Regan

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

The inner surfaces of the human heart are covered by a complex network of muscular strands that is thought to be a remnant of embryonic development1,2. The function of these trabeculae in adults and their genetic architecture are unknown. Here we performed a genome-wide association study to investigate image-derived phenotypes of trabeculae using the fractal analysis of trabecular morphology in 18,096 participants of the UK Biobank. We identified 16 significant loci that contain genes associated with haemodynamic phenotypes and regulation of cytoskeletal arborization3,4. Using biomechanical simulations and observational data from human participants, we demonstrate that trabecular morphology is an important determinant of cardiac performance. Through genetic association studies with cardiac disease phenotypes and Mendelian randomization, we find a causal relationship between trabecular morphology and risk of cardiovascular disease. These findings suggest a previously unknown role for myocardial trabeculae in the function of the adult heart, identify conserved pathways that regulate structural complexity and reveal the influence of the myocardial trabeculae on susceptibility to cardiovascular disease.

Original languageEnglish
Pages (from-to)589-594
Number of pages6
JournalNature
Volume584
Issue number7822
DOIs
StatePublished - 27 Aug 2020
Externally publishedYes

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