Abstract
In recent years more and more studies have revealed the effect of extraneous oxytocin on the social behavior of dogs. The distribution of administered oxytocin in different physiologically relevant compartments is important because this knowledge forms the basis for the timing of behavior tests after the administration. Most behavioral studies rely on the non-invasive intranasal application of oxytocin. The aim of this study was to determine the time course of intranasal administered oxytocin secretion into blood and urine and also establish a connection between intranasal received oxytocin and urinary cortisol in dogs. In our experiment, four dogs received three puffs, 12 IU intranasal oxytocin treatment, two dogs received three puffs intranasal placebo treatment. Blood and urine samples were collected immediately prior to the administration then regularly during 4 h. After nasal oxytocin application, the serum oxytocin concentration increased, reached a maximum 15 min after the treatment and then rapidly returned to baseline levels 45 min later. The peak urinary oxytocin concentration occurred between 45 and 60 min after administration and returned to baseline levels slowly. We found considerable differences among individuals in the secretion of oxytocin in both the serum and the urinary oxytocin concentration measurements. Our results confirm that intranasally administered oxytocin passes into the blood stream. The time course of intranasally administered oxytocin secretion is similar to the time course of intravenously administered oxytocin secretion, and the peak values are also similar in both the serum and the urinary oxytocin concentration measurements, although there are large individual differences.
Highlights
Beside the reproductive functions, oxytocin plays an important role in the regulation of social behavior [for reviews, see Ref. [1, 2]]
The peak urinary oxytocin concentration after nasal oxytocin application in female dogs occurred between Time 45 and Time 60 and returned to baseline levels slowly
Our results are more likely in line with the time lapse of plasma oxytocin concentrations were measured in dogs after the animals were injected with exogenous oxytocin intravenously [41]
Summary
Oxytocin plays an important role in the regulation of social behavior (pair bonding, sexual and maternal behavior, peer recognition, and social memory) [for reviews, see Ref. [1, 2]]. Oxytocin plays an important role in the regulation of social behavior (pair bonding, sexual and maternal behavior, peer recognition, and social memory) [for reviews, see Ref. Recent studies have revealed the relevance of oxytocin in human bonding, trust and in some aspects of human social cognition including social perception, emotion recognition, sensitivity to others’ experiences, and prosocial behaviors [for reviews, see Ref. Human studies reported some beneficial effects of oxytocin on social attention and emotion. Oxytocin in Dogs recognition in autistic individuals, and reduction of social anxiety in patients suffering from social phobia and borderline personality disorder [5,6,7,8,9]. Medical treatment as a complementary therapy to behavioral intervention may help the social integration of these companion animals to rejoin human families
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