光学测图
心脏电生理学
收缩(语法)
联轴节(管道)
钙
心肌细胞
心肌
诱导多能干细胞
计算机科学
生物物理学
生物医学工程
电生理学
化学
生物系统
材料科学
解剖
细胞生物学
生物
神经科学
胚胎干细胞
生物化学
工程类
遗传学
有机化学
基因
冶金
内分泌学
作者
Louis G. Woodhams,Jingxuan Guo,David Schuftan,John J. Boyle,Kenneth M. Pryse,Elliot L. Elson,Nathaniel Huebsch,Guy M. Genin
标识
DOI:10.1073/pnas.2212949120
摘要
Fluorescent reporters of cardiac electrophysiology provide valuable information on heart cell and tissue function. However, motion artifacts caused by cardiac muscle contraction interfere with accurate measurement of fluorescence signals. Although drugs such as blebbistatin can be applied to stop cardiac tissue from contracting by uncoupling calcium-contraction, their usage prevents the study of excitation-contraction coupling and, as we show, impacts cellular structure. We therefore developed a robust method to remove motion computationally from images of contracting cardiac muscle and to map fluorescent reporters of cardiac electrophysiological activity onto images of undeformed tissue. When validated on cardiomyocytes derived from human induced pluripotent stem cells (iPSCs), in both monolayers and engineered tissues, the method enabled efficient and robust reduction of motion artifact. As with pharmacologic approaches using blebbistatin for motion removal, our algorithm improved the accuracy of optical mapping, as demonstrated by spatial maps of calcium transient decay. However, unlike pharmacologic motion removal, our computational approach allowed direct analysis of calcium-contraction coupling. Results revealed calcium-contraction coupling to be more uniform across cells within engineered tissues than across cells in monolayer culture. The algorithm shows promise as a robust and accurate tool for optical mapping studies of excitation-contraction coupling in heart tissue.
科研通智能强力驱动
Strongly Powered by AbleSci AI