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Proceedings Paper

Initial proof-of-concept of photoacoustic cell stimulation approach: preliminary in vitro study
Author(s): Jeeun Kang; Hanh N. D. Le; Haichong K. Zhang; Jin U. Kang; Maged M. Harraz; Emad M. Boctor
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Paper Abstract

Localized, non-invasive cell stimulation has many applications. Here we show the initial proof-of-concept in vitro study of the photoacoustic cell stimulation approach, which is amenable to high-throughput screening applications. The proposed method is implemented as follows: 1) the localized excitation using the focused pulsed laser delivery on an absorptive material placed inside the well containing the cells, 2) cell stimulation by the photoacoustic pressure generated, and 3) fluorescence quantification of the membrane potential change over time. The preliminary proof-ofconcept in vitro study is conducted with primary neurons isolated from mouse cerebral cortex. The absorptive rubber media generates the photoacoustic pressure by the pulsed laser excitation. The experimental results show the feasibility of photoacoustic cell stimulation approach by indicating the significant membrane potential chance from the photoacoustically-stimulated primary neurons. Otherwise, the sham control without any photoacoustic stimulation shows minimal membrane potential change. We envisage that the proposed approach can allow broad strategies for noninvasive cell stimulation by using the photoacoustic contrasts situated at inside or outside of the body such as external absorptive materials or intravascularly-injected photoacoustic contrast particles.

Paper Details

Date Published: 20 July 2017
PDF: 6 pages
Proc. SPIE 10052, Optogenetics and Optical Manipulation, 100520U (20 July 2017); doi: 10.1117/12.2253296
Show Author Affiliations
Jeeun Kang, Johns Hopkins Univ. (United States)
Hanh N. D. Le, Johns Hopkins Univ. (United States)
Haichong K. Zhang, Johns Hopkins Univ. (United States)
Jin U. Kang, Johns Hopkins Univ. (United States)
Maged M. Harraz, Johns Hopkins Univ. (United States)
Emad M. Boctor, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 10052:
Optogenetics and Optical Manipulation
Samarendra K. Mohanty; Nitish V. Thakor; E. Duco Jansen, Editor(s)

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