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Biomechanical Testing of Murine Tendons
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Method development and characterization of chick embryo tendon mechanical properties.

Javier Navarro1, Antonion Korcari2, Phong Nguyen2

  • 1Fischell Department of Bioengineering, University of Maryland, College Park, MD, United States; Department of Biomedical Engineering, University of Rochester, NY, United States; Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States.

Journal of Biomechanics
|February 5, 2022
PubMed
Summary

A new marking protocol accurately identifies embryonic chick tendons for mechanical testing. This method reveals non-linear development of tendon mechanical properties, crucial for understanding tendon formation and tissue engineering.

Keywords:
Chick embryoDevelopmentMechanical propertiesTendonTensile testing

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Area of Science:

  • Biomechanical Engineering
  • Developmental Biology
  • Tissue Engineering

Background:

  • Tendons are vital connective tissues susceptible to various disorders and injuries.
  • Understanding embryonic tendon development is key for regenerative medicine and tissue engineering strategies.
  • The chick embryo serves as a relevant model for studying tendon formation, specifically the Achilles (calcaneal) tendon.

Purpose of the Study:

  • To develop and implement a reliable method for isolating and mechanically testing embryonic chick calcaneal tendons.
  • To characterize the mechanical property development of embryonic tendons.
  • To establish a foundation for future research in embryonic tendon tissue engineering.

Main Methods:

  • Development of a "marking protocol" to precisely identify and isolate calcaneal tendons at various embryonic stages.
  • Mechanical testing (tensile testing) of isolated embryonic tendons.
  • Comparison of mechanical properties between tendons isolated using the marking protocol versus traditional "eyeballing" methods.

Main Results:

  • The marking protocol enabled accurate isolation of embryonic tendons, revealing previously unobserved developmental trends.
  • Marked tendons showed non-linear increases in tensile modulus and ultimate tensile strength during development.
  • Eyeballed tendons exhibited inaccurate linear increases in mechanical properties, highlighting the protocol's necessity.

Conclusions:

  • The developed marking protocol is essential for accurate tensile testing of embryonic chick tendons.
  • Embryonic tendon mechanical properties exhibit non-linear development, providing critical insights into functional tendon formation.
  • This methodology and findings support advancements in embryonic tendon tissue engineering and regenerative medicine.