Abstract:
INTRODUCTION:Physiological stress is one of the various factors that can have an impact on stable isotope ratios. However, its effect on bone collagen stable isotope ratios is still not fully understood. This study aims to build on previous research on how different disease stages may affect bone collagen stable isotope ratios. MATERIALS AND METHODS:Carbon (δ13 C) and nitrogen (δ15 N) isotope ratios were assessed in 33 skeletons that retained evidence of infectious disease and healed fractures. Samples were taken from active lesions (long bones n = 14; ribs n = 4), healed lesions (long bones n = 10; ribs n = 9), or a fracture callus (long bones n = 9; ribs n = 3). Results were compared to stable isotope ratios calculated for regions on these bones that did not retain evidence of disease or fracture. RESULTS:Long bones with active lesions had a significantly higher average δ15 N (δ15 N = 11.1 ± 0.9‰) compared to those without lesions (δ15 N = 10.7 ± 0.7‰; p = .02), while fracture calluses showed the largest range for both δ15 N and δ13 C. There were no significant differences in stable isotope ratios when compared between nonlesion and lesion sites in the ribs. DISCUSSION:The increase in δ15 N seen in active lesions, when compared with δ15 N from nonlesion regions on the same long bone, may be a consequence of altered protein metabolism. The high variability of δ15 N and δ13 C in fractures may be related to different healing stages of the calluses. This study suggests that stable isotope data can contribute information about diseases in the past, as well as an individual's response to diseases in the absence of modern medicine and antibiotics.
journal_name
Am J Phys Anthropoljournal_title
American journal of physical anthropologyauthors
Curto A,Mahoney P,Maurer AF,Barrocas-Dias C,Fernandes T,Fahy GEdoi
10.1002/ajpa.23958subject
Has Abstractpub_date
2020-02-01 00:00:00pages
285-297issue
2eissn
0002-9483issn
1096-8644journal_volume
171pub_type
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