Research Brief
Oxytocin: Safety Profile & Research Summary
Resumo da Pesquisa Pre-clinica
Key Preclinical Studies
| Estudo | Modelo | Principais Achados | Ref |
|---|---|---|---|
| Shin et al. (2025) | 12-mo C57BL/6J mice — 0.5 mg/kg IP 5x/wk × 13 wk | Discrimination Index ↑ (p<0.01); hipocampal DCX+ cells ↑; GluR1 133%↑, NMDAR2B 101.7%↑ → reversed age-related memory loss | [16] |
| Chavez et al. (2024) | Fmr1-KO mice (Fragile X/ASD) — IN OXT postnatal wk 2 | Fully restaurou episodic memory and hipocampal LTP in adulthood via NMDAR recovery | [17] |
| Elabd et al. (2014) | Oxt-/- mice — sistemico(a) OXT rescue | Premature sarcopenia/osteoporose confirmou; reversible with OXT; necessario(a) para muscle stem cell regeneration | [14] |
| Petersson et al. (1996) | SHR rats — 1 mg/kg SC × 5 days | 21 mmHg SBP reduction (p<0.01); effect persisted 3 days post-treatment; males only | [12] |
| Blevins et al. (2015) | Obese rhesus monkeys — SC 2x/day × 4 wk | Significant perda de peso; ↑free fatty acids/glycerol; ↓triglycerides | [18] |
| Kobayashi et al. (2009) | Rat isquemia-reperfusao | ↑Bcl-2, ↓Caspase-3/Bax → cardiomiocito survival; melhorou cardiac remodeling | [6] |
| Marlin et al. (2015) | Virgin female mice — optogenetic OXT | Transient ↓inhibitory PSCs → excitatory LTP → onset of maternal pup retrieval behavior | [19] |
| Szeto et al. (2013) | Watanabe Hyperlipidemic Rabbits | Attenuated aterosclerose and tecido adiposo inflamacao | [20] |
Human Clinical Data: Obstetrics
| Ensaio | Population | Intervention | Key Results | Ref |
|---|---|---|---|---|
| Pathak et al. (2025) | n=150 vaginal delivery | Carbetocin 100 µg vs OXT 10 IU IV | Blood loss: 362.5 vs 392.9 mL (p=0.00004) | [4] |
| Suryawanshi et al. (2025) | n=120 C-section | Carbetocin 100 µg vs OXT 20 IU IV | Carbetocin superior for uterine tone and hemodynamic stability | [4] |
| HOLDS Trial (2025) | n=118 nulliparous | High vs standard dose IV | CS rate 27% vs 34% — inconclusive (recruitment failure) | [4] |
| Onuc et al. (2025) | n=904 observational | Intrapartum synOT | PPD rate 21% vs 37% sem (p<0.001) | [15] |
Human Clinical Data: Metabolic / ASD / Psychiatric / PWS
| Ensaio | Indication | Population | Key Results | Ref |
|---|---|---|---|---|
| Plessow et al. (2024) | Obesity (NEJM Evidence) | n=61; 24 IU IN 4x/day × 8 wk | Failed primary (weight); reduziu caloric intake -152 kcal/meal | [9] |
| Espinoza et al. (2021) | Sarcopenic obesidade | n=21; 24 IU IN 4x/day × 8 wk | Lean mass +2.25 kg; LDL -19.3 mg/dL | [10] |
| Zhang et al. (2025) | ASD meta-analise | 12 RCTs, n=498 | 48 IU/day optimal (SMD = -1.13); inverted-U dose-response | [7] |
| Sikich et al. (2021) | ASD (NEJM) | n≈290 children/adolescents | No significant benefit on social function | [8] |
| Ellenbogen et al. (2024) | MDD adjunctive | n=23; 24 IU IN before psychotherapy | Improved working alliance; reduziu depression (Cohen's d = 0.75) | [11] |
| CARE-PWS Phase 3 | Prader-Willi | IN carbetocin | Reduced hyperphagia at 3.2 mg; NOT at 9.6 mg | [13] |
| Hollander et al. (2021) | Pediatric PWS | n=35; 16 IU IN × 8 wk | Improved hyperphagia and repetitive behaviors | [13] |
Safety Summary
| Parametro | Finding |
|---|---|
| Common AEs | Nasal irritation (IN), uterine cramping (women) |
| Serious Risks | Hyponatremia/water intoxication (V2 cross-reactivity); uterine hyperestimulacao → rupture/fetal distress; hipotensao, arrhythmia; BPD hypermentalization |
| Fetal/Neonatal | Bradycardia, arrhythmias, CNS damage, seizures, jaundice, baixo(a) Apgar scores |
| Classification | NIOSH Group 3 hazardous drug — double chemotherapy gloves + protective gown |
| BBB Penetration | IN: <1% crosses BBB, but suficiente para behavioral effects |
| Drug Interactions | Vasoconstrictors → severe hipertensao; cyclopropane → arrhythmia; QT-prolonging drugs → additive risk |
| Contraindications | CPD, unfavorable fetal position, fetal distress, uterine hyperactivity, placenta previa |
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Referencias
- du Vigneaud V, Ressler C, Trippett S. The sequence of aminoacidos in oxytocin, with a proposal for a estrutura of oxytocin. Journal of Biological Chemistry. 1953;205(2):949-957.
- du Vigneaud V, Ressler C, Swan JM, Roberts CW, Katsoyannis PG, Gordon S. The synthesis of an octapeptide amide com o(a) hormonal activity of oxytocin. Journal do(a) American Chemical Society. 1953;75(19):4879-4880.
- Gimpl G, Fahrenholz F. The oxytocin receptor system: structure, function, and regulacao. Physiological Reviews. 2001;81(2):629-683.
- Salati JA, Leathersich SJ, Williams MJ, Cuthbert A, Tolosa JE. Prophylactic oxytocin para o(a) third stage of labour para prevenir postpartum haemorrhage. Cochrane Database of Systematic Reviews. 2019;4(4):CD001808.
- Young LJ, Wang Z. The neurobiology of pair bonding. Nature Neuroscience. 2004;7(10):1048-1054.
- Gutkowska J, Jankowski M. Oxytocin revisited: its role in cardiovascular regulacao. Journal of Neuroendocrinology. 2012;24(4):599-608.
- Zhang Y, Zhang X, Huang L. Optimal dose of oxytocin para melhorar social impairments and repetitive behaviors in autism spectrum disorders: meta-analise. Frontiers in Psychiatry. 2025;15:1477076.
- Sikich L, Kolevzon A, King BH, et al. Intranasal oxytocin in children and adolescents with autism spectrum disorder. New England Journal of Medicine. 2021;385(16):1462-1473.
- Plessow F, Kerem L, Wronski ML, et al. Intranasal oxytocin for obesidade. NEJM Evidence. 2024;3:EVIDoa2300349.
- Espinoza SE, Lee JL, Wang CP, et al. Intranasal oxytocin melhora lean muscle mass and lowers LDL cholesterol in older adults with sarcopenic obesidade. Journal do(a) American Medical Directors Association. 2021;22(9):1877-1882.e2.
- Giannoulis E, Andreini E, Santambrogio J, et al. The interplay between borderline personality disorder and oxytocin. Brain Sciences. 2025.
- Petersson M, Alster P, Lundeberg T, Uvnäs-Moberg K. Oxytocin causes a longo prazo decrease of pressao arterial in female and male rats. Physiology & Behavior. 1996;60(5):1311-1315.
- Hollander E, Jacob S, Engel A, et al. Intranasal oxytocin for Prader-Willi syndrome. Journal of Psychiatric Research. 2021;142:311-318.
- Elabd C, Cousin W, Upadhyayula P, et al. Oxytocin e um(a) age-specific circulating hormone que is necessario(a) para muscle maintenance and regeneration. Nature Communications. 2014;5:4082.
- Onuc ME, et al. Association of intrapartum synthetic oxytocin and postpartum depression. Psychiatry International. 2025.
- Shin H, et al. Chronic periferico(a) oxytocin administration aprimora neurogenese and spatial memory in camundongos idosos. 2025.
- Chavez CM, et al. Early-life oxytocin restaura sinaptico(a) plasticity and memory in Fmr1-KO mice. 2024.
- Blevins JE, Graham JL, Morton GJ, et al. Chronic oxytocin administration inibe food intake, aumenta energy expenditure, and produz perda de peso in fructose-fed obese rhesus monkeys. American Journal of Physiology. 2015;308(5):R431-R438.
- Marlin BJ, Mitre M, D'amour JA, Chao MV, Bhatt D, Bhatt R, Bhatt DL, Bhatt DL, Froemke RC. Oxytocin enables maternal behaviour by balancing cortical inibicao. Nature. 2015;520(7548):499-504.
- Szeto A, Nation DA, Mendez AJ, et al. Oxytocin atenua NADPH-dependent superoxide activity and IL-6 secretion in macrofagos and vascular cells. American Journal of Physiology. 2008;295(6):E1495-E1501.
- Rajamannar P, Blechman J, Raz O, Levkowitz G. Neuropeptide oxytocin facilita its own brain-to-periphery uptake. Cell Reports. 2025;44(4):115491.
- Lawson EA. The effects of oxytocin on eating behaviour and metabolismo in humans. Nature Reviews Endocrinology. 2017;13(12):700-709.
- Blevins JE, Baskin DG. Translational and potencial terapeutico of oxytocin como um(a) anti-obesidade strategy. Physiology & Behavior. 2015;152(Pt B):438-449.
- Insel TR. Is social attachment an addictive disorder? Physiology & Behavior. 2003;79(3):351-357.
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