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The influence of glycosaminoglycan proteoglycan side chains on tensile force transmission and the nanostructural properties of Achilles tendons by Anas K. Al Makhzoomi; Thomas B. Kirk; Danielle E. Dye; Garry T. Allison is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract This study investigates the nanostructural mechanisms that lie behind load transmission in tendons and the role of glycosaminoglycans (GAGs) in the transmission of force in the tendon extracellular matrix. The GAGs in white New Zealand rabbit Achilles tendons were enzymatically depleted, and the tendons subjected to cyclic loading at 6% strain for up to 2 hr. A nanoscale morphometric assessment of fibril deformation under strain was linked with the decline in the tendon macroscale mechanical properties. An atomic force microscope (AFM) was employed to characterize the D‐periodicity within and between fibril bundles (WFB and BFB, respectively). By the end of the second hour of the applied strain, the WFB and BFB D‐periodicities had significantly increased in the GAG‐depleted group (29% increase compared with 15% for the control, p < .0001). No statistically significant differences were found between WFB and BFB D‐periodicities in either the control or GAG‐depleted groups, suggesting that mechanical load in Achilles tendons is uniformly distributed and fairly homogenous among the WFB and BFB networks. The results of this study have provided evidence of a cycle‐dependent m

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Author

Anas K. Al Makhzoomi; Thomas B. Kirk; Danielle E. Dye; Garry T. Allison

Publisher

Wiley

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)