Oxytocin
Preclinical ResearchOxytocin
The 'bonding hormone' - a naturally occurring peptide researched for social bonding, stress reduction, autism spectrum research, and metabolic effects.
Dose
Varies significantly by research indication and administration route. Intranasal doses commonly range from 8 IU to 40 IU; IV doses for labor induction can range from 0.5 to 20 mU/min.
Route
Nasal spray, IV, SubQ injection
Cycle
Highly variable depending on the research question; acute studies may be single-dose, while others may span weeks.
Storage
Lyophilized powder vial: store sealed at 2-8°C protected from light, or -20°C for long-term storage. Powder is markedly more stable than solution.
What is Oxytocin?
Oxytocin is a mammalian neurohypophysial hormone, best known for its role in social bonding, reproduction, and childbirth. It is synthesized in the hypothalamus and released by the posterior pituitary. In research, it is investigated for its potential to modulate social cognition, reduce stress, influence feeding behavior, and its role in various neuropsychiatric conditions. Administration routes vary widely, including intranasal for central effects and intravenous/subcutaneous for systemic actions.
Key Benefits
- Social bonding enhancement
- Stress and anxiety reduction
- Trust improvement
- Potential autism research
- Appetite and metabolic effects
- Labor induction (clinical)
Mechanism of Action
- Oxytocin receptor agonist
- Modulates amygdala response to social stimuli
- Reduces HPA axis stress response
- Influences GI motility and appetite
Best For
- Social anxiety research
- Autism research
- Bonding research
- Stress research
Body Systems
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Molecular Information
Molecular weight
1007.19 g/mol
Length
9 amino acids
Type
Cyclic Nonapeptide
Amino acid sequence
CYIQNCPLG (Cysteine-Tyrosine-Isoleucine-Glutamine-Asparagine-Cysteine-Proline-Leucine-Glycine)
Contains a disulfide bond between Cys1 and Cys6, forming a cyclic structure.
Pharmacokinetics
Time to peak
Intranasal: 15-45 minutes; IV: Immediate
Half-life
0.05 h
Time to clear
IV: Approximately 20-30 minutes; Intranasal: Longer due to slower absorption and potential central effects.
Various pharmacological studies, typically referencing clinical use or neuroendocrine research.
Research Indications
Social Bonding and Trust
Widely researched for enhancing social bonding, trust, and empathy, particularly in social dilemma games and perception tasks. It is thought to modulate amygdala activity in response to social stimuli.
Stress Reduction
Investigated for its ability to reduce physiological and psychological responses to stress, potentially by dampening the hypothalamic-pituitary-adrenal (HPA) axis activity.
Autism Spectrum Disorder (ASD)
Explored as a potential therapeutic agent to improve social cognition, eye gaze, and repetitive behaviors in individuals with ASD, though results are mixed and require further investigation.
Research Protocols
| Goal | Dose | Frequency | Route |
|---|---|---|---|
| Enhance social cognition/trust (Intranasal) | 16-40 IU (e.g., 2-5 puffs per nostril, 4 IU/puff) | Single acute administration prior to social tasks | Intranasal |
| Reduce stress response (Intranasal) | 24-40 IU | Single acute administration prior to stressor | Intranasal |
| Labor induction/augmentation (Clinical Model) | 0.5-20 mU/min (titrated) | Continuous IV infusion | Intravenous |
| Investigate appetite regulation (Intranasal) | 24 IU | Once daily for a period of weeks (e.g., 4-8 weeks) | Intranasal |
| Study central effects on reward/addiction (Intranasal) | 24 IU | Single administration or daily for short periods | Intranasal |
The timing of oxytocin administration relative to behavioral tasks or physiological measurements is critical for observing specific effects. Acute administration is common for studies on social cognition and stress response.
Peptide Interactions
- Monitor Combination
Ethanol (Alcohol)
Alcohol can inhibit oxytocin release and blunt its pro-social effects. Co-administration may alter behavioral outcomes in research.
- Monitor Combination
Cannabinoids (e.g., THC)
Cannabinoids can influence oxytocin systems, and their co-administration might modulate social or anxiety-related effects. Research on specific interactions is ongoing.
- Monitor Combination
SSRIs (Selective Serotonin Reuptake Inhibitors)
Serotonin and oxytocin systems are interconnected. Concurrent use might alter the efficacy or side effect profile of oxytocin, especially in mood-related research.
- Use Caution
Vasopressin Receptor Antagonists
Oxytocin and vasopressin receptors share homology. Vasopressin receptor antagonists could potentially interfere with oxytocin's action, especially at higher concentrations or specific receptor subtypes.
- Synergistic
Prostaglandins
In a clinical context (labor induction), prostaglandins are sometimes used synergistically with oxytocin to enhance uterine contractions. This interaction is well-established in obstetrics.
How to Reconstitute
- 1Verify the concentration of the oxytocin solution supplied.
- 2If diluting for specific intranasal research, use a sterile diluent (e.g., saline) under aseptic conditions.
- 3Measure the precise volume of oxytocin solution required for the desired dose.
- 4For intranasal administration, ensure proper delivery device (e.g., nebulizer, nasal spray bottle) is clean and appropriate.
- 5For injectable forms, draw the specified dose using a sterile syringe and needle.
What to Expect
- Acute behavioral changes (e.g., increased trust, altered social perception) may be observed within 30-60 minutes post-intranasal administration.
- Physiological effects such as uterine contractions (in relevant models) can occur rapidly after IV administration.
- Studies on chronic conditions or neuroplasticity may observe effects over weeks or months.
- Variability in response is commonly reported due to individual differences in oxytocin receptor sensitivity and baseline levels.
- No significant acute physical changes are typically observed beyond the intended psychological or physiological effects.
Side Effects & Safety
| Effect | Frequency | Severity |
|---|---|---|
| Nausea (nasal) | Uncommon | Mild |
| Headache | Uncommon | Mild |
| Uterine contractions | With high doses | Serious - contraindicated in pregnancy unless clinical |
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Open CalculatorPeptides discussed here are for research purposes only. Nothing on this page is medical advice. Always consult a qualified professional before making health decisions.