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13 March 2019 Non-contact quantification of tissue biomechanics during embryo development with Brillouin microscopy and optical coherence tomography (Conference Presentation)
Jitao Zhang, Raksha Raghunathan, Justin Rippy, Chen Wu, Richard H. Finnell, Kirill Larin, Giuliano Scarcelli
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Proceedings Volume 10880, Optical Elastography and Tissue Biomechanics VI; 1088014 (2019) https://doi.org/10.1117/12.2507554
Event: SPIE BiOS, 2019, San Francisco, California, United States
Abstract
Embryonic development involves the interplay of driving forces that shape the tissue and the mechanical resistance that the tissue offers in response. While increasing evidence has suggested the crucial role of physical mechanisms underlying embryo development, tissue biomechanics is not well understood due to the lack of techniques that can quantify the stiffness of tissue in-situ with 3D high-resolution and in a non-contact manner. In this work, we used two all-optical technique, optical coherence tomography (OCT) and Brillouin microscopy, to map the longitudinal modulus of the neural tube tissue of mouse embryo in-situ. We found the tissue stiffens significantly after the closure of the neural tube at cranial regions by comparing embryos at E 8.5 and E 9.5. In addition, we observed that the region of fusion following neural tube closure is softer than the adjacent neural folds, and the neural folds show a modulus gradient along dorsal-ventral direction. Furthermore, we found the overlaying ectoderm is much softer and more pliable than the closed neural tube, and thus can be distinguished based on its mechanical properties. In conclusion, we demonstrated the capability of OCT and Brillouin microscopy to quantify tissue modulus of mouse embryos in-situ, and observed a distinct change of tissue modulus during the closure of cranial neural tube, suggesting this method could be helpful in investigating the role of tissue biomechanics in the regulation of embryo development.
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Jitao Zhang, Raksha Raghunathan, Justin Rippy, Chen Wu, Richard H. Finnell, Kirill Larin, and Giuliano Scarcelli "Non-contact quantification of tissue biomechanics during embryo development with Brillouin microscopy and optical coherence tomography (Conference Presentation)", Proc. SPIE 10880, Optical Elastography and Tissue Biomechanics VI, 1088014 (13 March 2019); https://doi.org/10.1117/12.2507554
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KEYWORDS
Tissues
Optical coherence tomography
Microscopy
Tissue optics
Optical microscopy
Resistance
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