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Validation of Salivary Oxytocin and Vasopressin as Biomarkers in Domestic Dogs

Evan L. MacLean, Laurence R. Gesquiere, Nancy Gee, Kerinne Levy, W. Lance Martin, C. Sue Carter
doi: https://doi.org/10.1101/151522
Evan L. MacLean
1 School of Anthropology, University of Arizona, Tucson, AZ 85721
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Laurence R. Gesquiere
2 Department of Biology, Duke University, Durham, NC 27708
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Nancy Gee
3 Waltham Centre for Pet Nutrition, Waltham on the Wolds, Leicestershire, United Kingdom, LE14 4RT
4 Department of Psychology, State University of New York, Fredonia, NY 14063
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Kerinne Levy
5 Canine Companions for Independence, Santa Rosa, CA, 95407
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W. Lance Martin
6 Martin-Protean LLC, Princeton, NJ 08540
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C. Sue Carter
7 Kinsey Institute and Department of Biology, Indiana University, Bloomington, IN 47405
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Abstract

Background Oxytocin (OT) and Vasopressin (AVP) are phylogenetically conserved neuropeptides with effects on social behavior, cognition and stress responses. Although OT and AVP are most commonly measured in blood, urine and cerebrospinal fluid (CSF), these approaches present an array of challenges including concerns related to the invasiveness of sample collection, the potential for matrix interference in immunoassays, and whether samples can be collected at precise time points to assess event-linked endocrine responses.

New Method We validated enzyme-linked immunosorbent assays (ELISAs) for the measurement of salivary OT and AVP in domestic dogs.

Results Both OT and AVP were present in dog saliva and detectable by ELISA and high performance liquid chromatography – mass spectrometry (HPLC-MS). OT concentrations in dog saliva were much higher than those typically detected in humans. OT concentrations in the same samples analyzed with and without sample extraction were highly correlated, but this was not true for AVP. ELISA validation studies revealed good accuracy and parallelism, both with and without solid phase extraction. Collection of salivary samples with different synthetic swabs, or following salivary stimulation or the consumption of food led to variance in results. However, samples collected from the same dogs using different techniques tended to be positively correlated. We detected concurrent elevations in salivary and plasma OT during nursing.

Comparison with Existing Methods There are currently no other validated methods for measuring OT/AVP in dog saliva.

Conclusions OT and AVP are present in dog saliva, and ELISAs for their detection are methodologically valid.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted June 18, 2017.
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Validation of Salivary Oxytocin and Vasopressin as Biomarkers in Domestic Dogs
Evan L. MacLean, Laurence R. Gesquiere, Nancy Gee, Kerinne Levy, W. Lance Martin, C. Sue Carter
bioRxiv 151522; doi: https://doi.org/10.1101/151522
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Validation of Salivary Oxytocin and Vasopressin as Biomarkers in Domestic Dogs
Evan L. MacLean, Laurence R. Gesquiere, Nancy Gee, Kerinne Levy, W. Lance Martin, C. Sue Carter
bioRxiv 151522; doi: https://doi.org/10.1101/151522

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