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  • 标题:Correcting for enzyme immunoassay changes in long term monitoring studies
  • 本地全文:下载
  • 作者:Abbey E. Wilson ; Agnieszka Sergiel ; Nuria Selva
  • 期刊名称:MethodsX
  • 印刷版ISSN:2215-0161
  • 电子版ISSN:2215-0161
  • 出版年度:2021
  • 卷号:8
  • 页码:1-11
  • DOI:10.1016/j.mex.2021.101212
  • 语种:English
  • 出版社:Elsevier
  • 摘要:AbstractEnzyme immunoassays (EIAs) are a common tool for measuring steroid hormones in wildlife due to their low cost, commercial availability, and rapid results. Testing technologies improve continuously, sometimes requiring changes in protocols or crucial assay components. Antibody replacement between EIA kits can cause differences in EIA sensitivity, which can hinder monitoring hormone concentration over time. The antibody in a common cortisol EIA kit used for long-term monitoring of stress in wildlife was replaced in 2014, causing differences in cross reactivity and standard curve concentrations. Therefore, the objective of this study was to develop a method to standardize results following changes in EIA sensitivity. We validated this method using cortisol concentrations measured in the hair of brown bears (Ursus arctos).•We used a simple linear regression to model the relationship between cortisol concentrations using kit 1 and kit 2.•We found a linear relationship between the two kits (R2 = 0.85) and used the regression equation (kit2 = (0.98 × kit1) + 1.65) to predict cortisol concentrations in re-measured samples.•Mean predicted percent error was 16% and 72% of samples had a predicted percent error <20%, suggesting that this method is well-suited for correcting changes in EIA sensitivity.Graphical abstractDisplay Omitted
  • 关键词:Hair cortisol;Wildlife;Brown bear;Enzyme immunoassay;Standardization
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