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Comparing apples and oranges : why infant bone collagen may not reflect dietary intake in the same way as dentine collagen.

Beaumont, Julia and Craig Atkins, Elizabeth and Buckberry, Jo and Haydock, Hannah and Horne, Pennie and Howcroft, Rachel and MacKenzie, Kevin and Montgomery, Janet (2018) 'Comparing apples and oranges : why infant bone collagen may not reflect dietary intake in the same way as dentine collagen.', American journal of physical anthropology., 167 (3). pp. 524-540.

Abstract

Objectives: Recent developments in incremental dentine analysis allowing increased temporal resolution for tissues formed during the first 1,000 days of life have cast doubt on the veracity of weaning studies using bone collagen carbon (δ13C) and nitrogen (δ15N) isotope ratio data from infants. Here, we compare published bone data from the well‐preserved Anglo‐Saxon site of Raunds Furnells, England, with co‐forming dentine from the same individuals, and investigate the relationship of these with juvenile stature. The high‐resolution isotope data recorded in dentine allow us to investigate the relationship of diet with juvenile stature during this critical period of life. Materials and methods: We compare incremental dentine collagen δ13C and δ15N data to published bone collagen data for 18 juveniles and 5 female adults from Anglo Saxon Raunds Furnells alongside new data for juvenile skeletal and dental age. An improvement in the method by sampling the first 0.5 mm of the sub‐cuspal or sub‐incisal dentine allows the isotopic measurement of dentine formed in utero. Results and discussion: δ13C profiles for both dentine and bone are similar and more robust than δ15N for estimating the age at which weaning foods are introduced. Our results suggest δ15N values from dentine can be used to evaluate the maternal/in utero diet and physiology during pregnancy, and that infant dentine profiles may reflect diet PLUS an element of physiological stress. In particular, bone collagen fails to record the same range of δ15N as co‐forming dentine, especially where growth is stunted, suggesting that infant bone collagen is unreliable for weaning studies.

Item Type:Article
Full text:Publisher-imposed embargo
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First Live Deposit - 02 July 2018
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1002/ajpa.23682
Publisher statement:© 2018 The Authors. American Journal of Physical Anthropology published by Wiley Periodicals, Inc. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Record Created:02 Jul 2018 11:28
Last Modified:22 Oct 2018 09:55

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