A comprehensive multiscale framework for simulating optogenetics in the heart.

Abstract:

:Optogenetics has emerged as an alternative method for electrical control of the heart, where illumination is used to elicit a bioelectric response in tissue modified to express photosensitive proteins (opsins). This technology promises to enable evocation of spatiotemporally precise responses in targeted cells or tissues, thus creating new possibilities for safe and effective therapeutic approaches to ameliorate cardiac function. Here we present a comprehensive framework for multiscale modelling of cardiac optogenetics, allowing both mechanistic examination of optical control and exploration of potential therapeutic applications. The framework incorporates accurate representations of opsin channel kinetics and delivery modes, spatial distribution of photosensitive cells, and tissue illumination constraints, making possible the prediction of emergent behaviour resulting from interactions at sub-organ scales. We apply this framework to explore how optogenetic delivery characteristics determine energy requirements for optical stimulation and to identify cardiac structures that are potential pacemaking targets with low optical excitation thresholds.

journal_name

Nat Commun

journal_title

Nature communications

authors

Boyle PM,Williams JC,Ambrosi CM,Entcheva E,Trayanova NA

doi

10.1038/ncomms3370

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2370

issn

2041-1723

pii

ncomms3370

journal_volume

4

pub_type

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