Validation of two immunoassays for oxytocin measurements in human saliva
Lopez Arjona, Marina (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Cerón, José Joaquín (Universidad de Murcia. Laboratorio Interdisciplinario de Análisis Clínicos Interlab)
Mateo, Sandra V. (Instituto Murciano de Investigación Biosanitaria)
Contreras-Aguilar, M. D. (Universidad de Murcia. Laboratorio Interdisciplinario de Análisis Clínicos Interlab)
Martínez-Subiela, Silvia (Universidad de Murcia. Laboratorio Interdisciplinario de Análisis Clínicos Interlab)

Data:	2024
Resum:	The objective of this research was to develop and validate two immunoassays for oxytocin measurement in human saliva, one using a monoclonal and the other a polyclonal antibody against oxytocin, whose affinity for oxytocin was tested by an antibody mapping epitope analysis. These assays were analytically validated and used to compare oxytocin concentrations with those obtained with a commercial kit before and after the extraction or reduction/alkylation (R/A) treatments to saliva samples. The assays were also used to evaluate changes in salivary oxytocin concentrations following a physical effort and an induced psychological stress, which have previously been described as situations that cause an increase in salivary oxytocin. Both assays showed to be precise and accurate in the validation studies, and the antibodies used showed a defined binding region in case of the monoclonal antibody, whereas the polyclonal antibody showed binding events through all the oxytocin sequence. Although the monoclonal and polyclonal assays showed a positive correlation, they give results in a different range of magnitude. Both assays showed significant increases in oxytocin concentrations when applied after the physical effort and the psychological stress. This study shows that a variability in the reported values of oxytocin can occur depending on the assay and indicates that the use of different types of antibodies can give a different range of values when measuring oxytocin in saliva.
Ajuts:	Agencia Estatal de Investigación AGL2016-79096-R Agencia Estatal de Investigación PDC2021-121291-I00 Ministerio de Educación, Cultura y Deporte FPU16/02170 Ministerio de Ciencia e Innovación FJC2021-047105-I
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Oxytocin ; Saliva ; Enzyme-linked immunoassays ; Monoclonal antibodies ; Cayman Islands ; Epitope mapping ; Measurement ; Psychological stress
Publicat a:	PloS one, Vol. 19 (april 2024) , ISSN 1932-6203

DOI: 10.1371/journal.pone.0297539
PMID: 38635553

16 p, 1.1 MB

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