Methodology for Cross-Talk Elimination in Simultaneous Voltage and Calcium Optical Mapping Measurements With Semasbestic Wavelengths.

Methodology for Cross-Talk Elimination in Simultaneous Voltage and Calcium Optical Mapping Measurements With Semasbestic Wavelengths.
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DOI:
10.3389/fphys.2022.812968
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发表时间:
2022
影响因子:
4
通讯作者:
Fenton FH
Fenton FH
中科院分区:
医学2区
文献类型:
--
作者:
Uzelac I;Crowley CJ;Iravanian S;Kim TY;Cho HC;Fenton FH

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在整个心脏水平上的大多数心律失常是由于细胞膜离子通道和细胞内钙离子浓度([Ca 2 +]i)的改变,通过组织水平耦合产生时空行为。例如,动态诱导的动作电位时程空间离散、QT间期延长和交替是常规和心力衰竭患者心律失常易感性的临床标志物,其起源于跨膜电压(Vm)和[Ca 2 +]i的变化。我们提出了一种光学映射方法,允许使用单相机同时测量Vm - [Ca 2 +]i信号,而不会产生串扰,从而可以定量表征心力衰竭中重塑和/或药物产生的有利/不利细胞和组织动力学效应。我们从理论上和实验上证明,在六个不同的物种存在的一个家庭的激发波长,我们称之为semasbestic,给一种染料的信号没有变化,因此可以用来记录信号从另一种染料,保证零串扰。
Most cardiac arrhythmias at the whole heart level result from alteration of cell membrane ionic channels and intracellular calcium concentration ([Ca2+]i) cycling with emerging spatiotemporal behavior through tissue-level coupling. For example, dynamically induced spatial dispersion of action potential duration, QT prolongation, and alternans are clinical markers for arrhythmia susceptibility in regular and heart-failure patients that originate due to changes of the transmembrane voltage (Vm) and [Ca2+]i. We present an optical-mapping methodology that permits simultaneous measurements of the Vm - [Ca2+]i signals using a single-camera without cross-talk, allowing quantitative characterization of favorable/adverse cell and tissue dynamical effects occurring from remodeling and/or drugs in heart failure. We demonstrate theoretically and experimentally in six different species the existence of a family of excitation wavelengths, we termed semasbestic, that give no change in signal for one dye, and thus can be used to record signals from another dye, guaranteeing zero cross-talk.
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