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Is the collagen primed for mineralization in specific regions of the Turkey tendon?: an investigation of the protein-mineral interface using Raman spectroscopy

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  • Jemma G. Kerns
  • Kevin Buckley
  • John Churchwell
  • Anthony W. Parker
  • Pavel Matousek
  • Allen E. Goodship
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<mark>Journal publication date</mark>2/02/2016
<mark>Journal</mark>Analytical Chemistry
Issue number3
Volume88
Number of pages5
Pages (from-to)1559-1563
Publication statusPublished
Early online date13/01/16
Original languageEnglish

Abstract

The tendons in the turkey leg have specific well-defined areas which become mineralized as the animal ages and they are a thoroughly characterized model system for studying the mineralization process of bone. In this study, nondestructive Raman spectroscopic analysis was used to explore the hypothesis that regions of the turkey tendon that are associated with mineralization exhibit distinct and observable chemical modifications of the collagen prior to the onset of mineralization. The Raman spectroscopy features associated with mineralization were identified by probing (on the micrometer scale) the transition zone between mineralized and nonmineralized regions of turkey leg tendons. These features were then measured in whole tendons and identified in regions of tendon which are destined to become rapidly mineralized around 14 weeks of age. The data show there is a site-specific difference in collagen prior to the deposition of mineral, specifically the amide III band at 1270 cm(-1) increases as the collagen becomes more ordered (increased amide III:amide I ratio) in regions that become mineralized compared to collagen destined to remain nonmineralized. If this mechanism were present in materials of different mineral fraction (and thus material properties), it could provide a target for controlling mineralization in metabolic bone disease.

Bibliographic note

ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. © American Chemical Society 2016