Detection of steroid and thyroid hormones in mammalian teeth
Endocrine tools can provide an avenue to better understand mammalian life histories and predict how individuals and populations may respond to environmental stressors; however, few options exist for studying long-term endocrine patterns in individual marine mammals. Here, we (i) determined whether h...
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ftpubmed:oai:pubmedcentral.nih.gov:8633673 2023-05-15T15:41:54+02:00 Detection of steroid and thyroid hormones in mammalian teeth Hudson, Justine M Matthews, Cory J D Watt, Cortney A 2021-11-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633673/ https://doi.org/10.1093/conphys/coab087 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633673/ http://dx.doi.org/10.1093/conphys/coab087 © Crown copyright 2021. This Open Access article contains public sector information licensed under the Open Government Licence v3.0 (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Conserv Physiol Toolbox Text 2021 ftpubmed https://doi.org/10.1093/conphys/coab087 2022-11-27T01:28:58Z Endocrine tools can provide an avenue to better understand mammalian life histories and predict how individuals and populations may respond to environmental stressors; however, few options exist for studying long-term endocrine patterns in individual marine mammals. Here, we (i) determined whether hormones could be measured in teeth from four marine mammal species: narwhal (Monodon monoceros), beluga (Delphinapterus leucas), killer whale (Orcinus orca) and Atlantic walrus (Odobenus rosmarus rosmarus); (ii) validated commercially available enzyme immunoassay kits for use with tooth extracts; and (iii) conducted biological validations for each species to determine whether reproductive hormone concentrations in teeth correlated with age of sexual maturity. Tooth extracts from all species had measurable concentrations of progesterone, testosterone, 17β-estradiol, corticosterone, aldosterone and triiodothyronine (T3); however, cortisol was undetectable. Parallelism between the binding curves of assay kit standards and serially diluted pools of tooth extract for each species was observed for all measurable hormones. Slopes of accuracy tests ranged from 0.750 to 1.116, with r(2) values ranging from 0.977 to 1.000, indicating acceptable accuracy. Biological validations were inconsistent with predictions for each species, with the exception of female killer whales (n = 2), which assumed higher progesterone and testosterone concentrations in mature individuals than immature individuals. Instead, we observed a decline in progesterone and testosterone concentrations from infancy through adulthood in narwhal (n = 1) and walruses (n = 2) and higher reproductive hormone concentrations in immature individuals than mature individuals in belugas (n = 8 and 10, respectively) and male killer whales (n = 1 and 2, respectively). While unexpected, this pattern has been observed in other taxa; however, further analytical and biological validations are necessary before this technique can be used to assess individual mammalian endocrine ... Text Beluga Beluga* Delphinapterus leucas Killer Whale Monodon monoceros narwhal* Odobenus rosmarus Orca Orcinus orca Killer whale walrus* PubMed Central (PMC) Conservation Physiology 9 1 |
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Toolbox Hudson, Justine M Matthews, Cory J D Watt, Cortney A Detection of steroid and thyroid hormones in mammalian teeth |
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description |
Endocrine tools can provide an avenue to better understand mammalian life histories and predict how individuals and populations may respond to environmental stressors; however, few options exist for studying long-term endocrine patterns in individual marine mammals. Here, we (i) determined whether hormones could be measured in teeth from four marine mammal species: narwhal (Monodon monoceros), beluga (Delphinapterus leucas), killer whale (Orcinus orca) and Atlantic walrus (Odobenus rosmarus rosmarus); (ii) validated commercially available enzyme immunoassay kits for use with tooth extracts; and (iii) conducted biological validations for each species to determine whether reproductive hormone concentrations in teeth correlated with age of sexual maturity. Tooth extracts from all species had measurable concentrations of progesterone, testosterone, 17β-estradiol, corticosterone, aldosterone and triiodothyronine (T3); however, cortisol was undetectable. Parallelism between the binding curves of assay kit standards and serially diluted pools of tooth extract for each species was observed for all measurable hormones. Slopes of accuracy tests ranged from 0.750 to 1.116, with r(2) values ranging from 0.977 to 1.000, indicating acceptable accuracy. Biological validations were inconsistent with predictions for each species, with the exception of female killer whales (n = 2), which assumed higher progesterone and testosterone concentrations in mature individuals than immature individuals. Instead, we observed a decline in progesterone and testosterone concentrations from infancy through adulthood in narwhal (n = 1) and walruses (n = 2) and higher reproductive hormone concentrations in immature individuals than mature individuals in belugas (n = 8 and 10, respectively) and male killer whales (n = 1 and 2, respectively). While unexpected, this pattern has been observed in other taxa; however, further analytical and biological validations are necessary before this technique can be used to assess individual mammalian endocrine ... |
format |
Text |
author |
Hudson, Justine M Matthews, Cory J D Watt, Cortney A |
author_facet |
Hudson, Justine M Matthews, Cory J D Watt, Cortney A |
author_sort |
Hudson, Justine M |
title |
Detection of steroid and thyroid hormones in mammalian teeth |
title_short |
Detection of steroid and thyroid hormones in mammalian teeth |
title_full |
Detection of steroid and thyroid hormones in mammalian teeth |
title_fullStr |
Detection of steroid and thyroid hormones in mammalian teeth |
title_full_unstemmed |
Detection of steroid and thyroid hormones in mammalian teeth |
title_sort |
detection of steroid and thyroid hormones in mammalian teeth |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633673/ https://doi.org/10.1093/conphys/coab087 |
genre |
Beluga Beluga* Delphinapterus leucas Killer Whale Monodon monoceros narwhal* Odobenus rosmarus Orca Orcinus orca Killer whale walrus* |
genre_facet |
Beluga Beluga* Delphinapterus leucas Killer Whale Monodon monoceros narwhal* Odobenus rosmarus Orca Orcinus orca Killer whale walrus* |
op_source |
Conserv Physiol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633673/ http://dx.doi.org/10.1093/conphys/coab087 |
op_rights |
© Crown copyright 2021. This Open Access article contains public sector information licensed under the Open Government Licence v3.0 (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). |
op_doi |
https://doi.org/10.1093/conphys/coab087 |
container_title |
Conservation Physiology |
container_volume |
9 |
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1 |
_version_ |
1766374787314089984 |