Oxytocin

Mechanism (as reported)

Research describes oxytocin as acting through the oxytocin receptor (OTR) to regulate physiological functions and to modulate sensory processing and social behaviors; region-specific disruption of oxytocin receptors can alter social behaviors (PMIDs: 28812265, 41001975).

Key findings (each cites a source)

• A perspective described the theranostic potential of the oxytocin receptor (OTR) as an emerging breast cancer target and discussed development of OTR-specific optical and nuclear tracers, including preclinical in vitro/in vivo studies and future directions. [PMID 38235665]
• A study reported development of potent, selective, and bright fluorescent peptide tracers based on oxytocin that enabled OTR labeling, activation, and internalization in cellular bioassays (including live and fixed systems), and supported live-cell applications such as single-molecule tracking and cell separation by fluorescence-activated cell sorting. [PMID 41001975]
• Research summarized in a review reported that oxytocin acts as a state modulator of sensory processing in early and higher olfactory brain regions, influencing social perception and that region-specific deletion of oxytocin receptors disrupts social behaviors. [PMID 28812265]
• A review described oxytocin and vasopressin as mediating actions via known receptors (including OT and AVP receptors V1a, V1b, and V2) and summarized research tool development, including selective peptide agonists/antagonists, radioiodinated/fluorescent ligands, and bivalent ligands, along with pharmacological data for selected compounds. [PMID 18655903]
• A systematic review reported human studies of intranasal oxytocin and discussed observed effects on social decision making, processing of social stimuli, specific social behaviors (e.g., eye contact), and social memory, and it framed the oxytocin system as a promising therapeutic target in conditions characterized by anxiety and aberrations in social function. [PMID 20047458]
• A review focused on oxytocin and social functioning reported associations between social anxiety and oxytocin receptor gene alleles as well as social anxiety and oxytocin plasma levels, and it stated that intranasal oxytocin had favorable effects on social anxiety symptomology in human studies. [PMID 28867943]
• A review on neurodevelopmental disorders reported that oxytocin is involved in domains including social recognition/bonding, anxiety, and food motivation/hyperphagia, and it stated that clinical trials have shown discrepant results for oxytocin effectiveness for core symptoms; it also outlined clinical pharmacology, safety considerations, and trial outcomes in ASD and Prader-Willi syndrome. [PMID 39455012]
• A chapter/summary reported that oxytocin analogs with agonistic and antagonistic properties have been synthesized and biologically evaluated, including atosiban (a mixed OTR/V1a antagonist used as a tocolytic agent in certain countries) and carbetocin (a longer-acting OTR agonist used for postpartum hemorrhage), and it reviewed modifications leading to these compounds. [PMID 31134574]