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Mechanical Characterization and Modelling of Subcellular Components of Oocytes

The early steps of embryogenesis are controlled exclusively by the quality of oocyte that linked closely to its mechanical properties. The mechanical properties of an oocyte were commonly characterized by assuming it was homogeneous such that the result deviated significantly from the true fact that...

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Autores principales: Du, Yue, Chen, Yizhe, Zhang, Shuai, Cheng, Dai, Liu, Yaowei, Zhao, Qili, Sun, Mingzhu, Cui, Maosheng, Zhao, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9319074/
https://www.ncbi.nlm.nih.gov/pubmed/35888904
http://dx.doi.org/10.3390/mi13071087
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author Du, Yue
Chen, Yizhe
Zhang, Shuai
Cheng, Dai
Liu, Yaowei
Zhao, Qili
Sun, Mingzhu
Cui, Maosheng
Zhao, Xin
author_facet Du, Yue
Chen, Yizhe
Zhang, Shuai
Cheng, Dai
Liu, Yaowei
Zhao, Qili
Sun, Mingzhu
Cui, Maosheng
Zhao, Xin
author_sort Du, Yue
collection PubMed
description The early steps of embryogenesis are controlled exclusively by the quality of oocyte that linked closely to its mechanical properties. The mechanical properties of an oocyte were commonly characterized by assuming it was homogeneous such that the result deviated significantly from the true fact that it was composed of subcellular components. In this work, we accessed and characterized the subcellular components of the oocytes and developed a layered high-fidelity finite element model for describing the viscoelastic responses of an oocyte under loading. The zona pellucida (ZP) and cytoplasm were isolated from an oocyte using an in-house robotic micromanipulation platform and placed on AFM to separately characterizing their mechanical profiling by analyzing the creep behavior with the force clamping technique. The spring and damping parameters of a Kelvin–Voigt model were derived by fitting the creeping curve to the model, which were used to define the shear relaxation modulus and relaxation time of ZP or cytoplasm in the ZP and cytoplasm model. In the micropipette aspiration experiment, the model was accurate sufficiently to deliver the time-varying aspiration depth of the oocytes under the step negative pressure of a micropipette. In the micropipette microinjection experiment, the model accurately described the intracellular strain introduced by the penetration. The developed oocyte FEM model has implications for further investigating the viscoelastic responses of the oocytes under different loading settings.
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spelling pubmed-93190742022-07-27 Mechanical Characterization and Modelling of Subcellular Components of Oocytes Du, Yue Chen, Yizhe Zhang, Shuai Cheng, Dai Liu, Yaowei Zhao, Qili Sun, Mingzhu Cui, Maosheng Zhao, Xin Micromachines (Basel) Article The early steps of embryogenesis are controlled exclusively by the quality of oocyte that linked closely to its mechanical properties. The mechanical properties of an oocyte were commonly characterized by assuming it was homogeneous such that the result deviated significantly from the true fact that it was composed of subcellular components. In this work, we accessed and characterized the subcellular components of the oocytes and developed a layered high-fidelity finite element model for describing the viscoelastic responses of an oocyte under loading. The zona pellucida (ZP) and cytoplasm were isolated from an oocyte using an in-house robotic micromanipulation platform and placed on AFM to separately characterizing their mechanical profiling by analyzing the creep behavior with the force clamping technique. The spring and damping parameters of a Kelvin–Voigt model were derived by fitting the creeping curve to the model, which were used to define the shear relaxation modulus and relaxation time of ZP or cytoplasm in the ZP and cytoplasm model. In the micropipette aspiration experiment, the model was accurate sufficiently to deliver the time-varying aspiration depth of the oocytes under the step negative pressure of a micropipette. In the micropipette microinjection experiment, the model accurately described the intracellular strain introduced by the penetration. The developed oocyte FEM model has implications for further investigating the viscoelastic responses of the oocytes under different loading settings. MDPI 2022-07-08 /pmc/articles/PMC9319074/ /pubmed/35888904 http://dx.doi.org/10.3390/mi13071087 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Du, Yue
Chen, Yizhe
Zhang, Shuai
Cheng, Dai
Liu, Yaowei
Zhao, Qili
Sun, Mingzhu
Cui, Maosheng
Zhao, Xin
Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title_full Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title_fullStr Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title_full_unstemmed Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title_short Mechanical Characterization and Modelling of Subcellular Components of Oocytes
title_sort mechanical characterization and modelling of subcellular components of oocytes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9319074/
https://www.ncbi.nlm.nih.gov/pubmed/35888904
http://dx.doi.org/10.3390/mi13071087
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