Cardiomyocyte orientation recovery at micrometer scale reveals long-axis fiber continuum in heart walls.
EMBO J
; 42(19): e113288, 2023 10 04.
Article
en En
| MEDLINE
| ID: mdl-37671467
ABSTRACT
Coordinated cardiomyocyte contraction drives the mammalian heart to beat and circulate blood. No consensus model of cardiomyocyte geometrical arrangement exists, due to the limited spatial resolution of whole heart imaging methods and the piecemeal nature of studies based on histological sections. By combining microscopy and computer vision, we produced the first-ever three-dimensional cardiomyocyte orientation reconstruction across mouse ventricular walls at the micrometer scale, representing a gain of three orders of magnitude in spatial resolution. We recovered a cardiomyocyte arrangement aligned to the long-axis direction of the outer ventricular walls. This cellular network lies in a thin shell and forms a continuum with longitudinally arranged cardiomyocytes in the inner walls, with a complex geometry at the apex. Our reconstruction methods can be applied at fine spatial scales to further understanding of heart wall electrical function and mechanics, and set the stage for the study of micron-scale fiber remodeling in heart disease.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Miocitos Cardíacos
/
Ventrículos Cardíacos
Límite:
Animals
Idioma:
En
Revista:
EMBO J
Año:
2023
Tipo del documento:
Article
País de afiliación:
India