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Two-Photon Cell and Tissue Level Laser Ablation Methods to Study Morphogenetic Biomechanics

Marshall, Abigail R; Maniou, Eirini; Moulding, Dale; Greene, Nicholas DE; Copp, Andrew J; Galea, Gabriel L; (2022) Two-Photon Cell and Tissue Level Laser Ablation Methods to Study Morphogenetic Biomechanics. Methods in Molecular Biology , 2438 pp. 217-230. 10.1007/978-1-0716-2035-9_14. Green open access

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Abstract

Laser ablation is routinely performed to infer mechanical tension in cells and tissues. Here we describe our method of two-photon laser ablation at the cellular and tissue level in mouse embryos. The primary outcome of these experiments is initial retraction following ablation, which correlates with, and so can be taken as a measure of, the tensile stress that structure was under before ablation. Several experimental variables can affect interpretation of ablation tests. Pre-test factors include differences in physical properties such as viscoelasticity between experimental conditions. Factors relevant during the test include viability of the cells at the point of ablation, image acquisition rate and the potential for overzealous ablations to cause air bubbles through heat dissipation. Post-test factors include intensity-biased image registration that can artificially produce apparent directionality. Applied to the closing portion of the mouse spinal neural tube, these methods have demonstrated long-range biomechanical coupling of the embryonic structure and have identified highly contractile cell populations involved in its closure process.

Type: Article
Title: Two-Photon Cell and Tissue Level Laser Ablation Methods to Study Morphogenetic Biomechanics
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/978-1-0716-2035-9_14
Publisher version: https://doi.org/10.1007/978-1-0716-2035-9_14
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Biomechanics, Laser ablation, Mouse, Neural tube, Two photon
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health > Developmental Biology and Cancer Dept
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10145768
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