Dynamic Characterization of the Biomechanical Behaviour of Bovine Ovarian Cortical Tissue and Its Short-Term Effect on Ovarian Tissue and Follicles

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ID: 116841
2020
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Abstract
The ovary is a dynamic mechanoresponsive organ. In vitro, tissue biomechanics was reported to affect follicle activation mainly through the Hippo pathway. Only recently, ovary responsiveness to mechanical signals was exploited for reproductive purposes. Unfortunately, poor characterization of ovarian cortex biomechanics and of the mechanical challenge hampers reproducible and effective treatments, and prevention of tissue damages. In this study the biomechanical response of ovarian cortical tissue from abattoir bovines was characterized for the first time. Ovarian cortical tissue fragments were subjected to uniaxial dynamic testing at frequencies up to 30 Hz, and at increasing average stresses. Tissue structure prior to and after testing was characterized by histology, with established fixation and staining protocols, to assess follicle quality and stage. Tissue properties largely varied with the donor. Bovine ovarian cortical tissue consistently exhibited a nonlinear viscoelastic behavior, with dominant elastic characteristics, in the low range of other reproductive tissues, and significant creep. Strain rate was independent of the applied stress. Histological analysis prior to and after mechanical tests showed that the short-term dynamic mechanical test used for the study did not cause significant tissue tear, nor follicle expulsion or cell damage.
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pascoletti2020materialsdynamic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Giulia Pascoletti;Maddalena Di Nardo;Gionata Fragomeni;Vincenza Barbato;Teresa Capriglione;Roberto Gualtieri;Riccardo Talevi;Gerardo Catapano;Elisabetta M. Zanetti;Pascoletti, Giulia;Di Nardo, Maddalena;Fragomeni, Gionata;Barbato, Vincenza;Capriglione, Teresa;Gualtieri, Roberto;Talevi, Riccardo;Catapano, Gerardo;Zanetti, Elisabetta M.;
Journal Materials (Basel, Switzerland)
Year 2020
DOI
10.3390/ma13173759
URL
https://doi.org/10.3390/ma13173759
Keywords
biomechanics elastic modulus creep ovarian tissue tensile test viscous behavior

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