Oxytocin free acid
Based on 16 publication(s) in Google Scholar
Oxytocin free acid (9-Deamidooxytocin) is an analog of oxytocin in which the glycinamide residue at position 9 in oxytocin has been replaced by a glycine residue. Oxytocin is a pleiotropic, peptide hormone with broad implications for general health, adaptation, development, reproduction, and social behavior.
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- CAS No.: 4248-64-0
- Formula: C43H65N11O13S2
- Molecular Weight:1008.17
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Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Publications Citing Use of MedChemExpress (MCE) Oxytocin free acid
More- NPJ Biofilms Microbiomes. 2025 Jun 21;11(1):113. [Abstract]
- J Headache Pain. 2021 Jul 27;22(1):84. [Abstract]
- ACS Appl Mater Interfaces. 2022 May 18;14(19):21822-21835. [Abstract]
- Neurosci Bull. 2025 Aug 6. [Abstract]
- CNS Neurosci Ther. 2025 Jul;31(7):e70511. [Abstract]
- Organogenesis. 2025 Dec;21(1):2460261. [Abstract]
- Front Pharmacol. 2019 Nov 15:10:1380. [Abstract]
- Sci Rep. 2020 Oct 2;10(1):16383. [Abstract]
- Metabolites. 2026 Apr 24;16(5):292. [Abstract]
- Psychoneuroendocrinology. 2024 Oct:168:107138. [Abstract]
- Am J Reprod Immunol. 2024 Oct;92(4):e13938. [Abstract]
- Neuroendocrinology. 2023;113(3):343-360. [Abstract]
- SSRN. 2026 Jun 16.
- Northwestern University. 2026.
- Biomed Pharmacother. 2025 Mar:184:117919. [Abstract]
- Evid Based Complement Alternat Med. 2020 May 23:2020:8607931. [Abstract]
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RT-PCR
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In Vivo Efficacy Study
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IF
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WB
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In Vivo Efficacy Study
Biological Activity
Chemical Information
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CAS No. 4248-64-0
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Molecular Weight 1008.17
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Formula C43H65N11O13S2
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Synonyms
9-Deamidooxytocin
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Sequence Shortening
CYIQNCPLG (Disulfide bridge:Cys1-Cys6)
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Publications (16)
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Journal Impact Factor
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Most Recent
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NPJ Biofilms Microbiomes
Lactobacillus amylovorus extracellular vesicles mitigate mammary gland ferroptosis via the gut-mammary gland axis. [Abstract]2025 Jun 21;11(1):113. PMID: 40544167 -
J Headache Pain
Repeated oxytocin prevents central sensitization by regulating synaptic plasticity via oxytocin receptor in a chronic migraine mouse model. [Abstract]2021 Jul 27;22(1):84. PMID: 34315403
Oxytocin free acid purchased from MedChemExpress. Usage Cited in: J Headache Pain. 2021 Jul 27;22(1):84. [Abstract]
Effect of OT on CGRP and c-fos expression levels. A and C show c-fos, B and D show CGRP. Immunofluorescence staining showed that the number of c-fos-positive cells per FOV and the average fluorescence intensity of CGRP were significantly increased in the NTG + vehicle group compared with the sham group. OT administration significantly reduced the expression of CGRP and c-fos, while these effects were prevented after adding L368,899. Repeated OT (Oxytocin, 20 µg/kg) treatments were quickly administered at 2 µL per nostril or the same volume of saline every two minutes using the tip of the pipette 30 min before NTG and then once daily at the same time point for 11 days.C57BL/6 mice weighing 20 ~ 30 g and 6 ~ 8 weeks of age.
Oxytocin free acid purchased from MedChemExpress. Usage Cited in: J Headache Pain. 2021 Jul 27;22(1):84. [Abstract]
WB data quantification in the mouse trigeminal nucleus caudalis. Repeated OT (Oxytocin, 20 µg/kg) treatments were quickly administered at 2 µL per nostril or the same volume of saline every two minutes using the tip of the pipette 30 min before NTG and then once daily at the same time point for 11 days.C57BL/6 mice weighing 20 ~ 30 g and 6 ~ 8 weeks of age.
Oxytocin free acid purchased from MedChemExpress. Usage Cited in: J Headache Pain. 2021 Jul 27;22(1):84. [Abstract]
OT ameliorated pain sensitization and reduced neuronal activation via OTR. Note that L-368,899 was intraperitoneally injected daily 1 h before OT treatment. The mechanical and thermal pain thresholds of the hind paw and periorbital area were assessed before each NTG injection and on day 11. B, C, D The basal mechanical pain thresholds of the hind paw (B), periorbital area (C), and the thermal pain response of the hind paw (D) were significantly increased in the NTG + OT group compared with the NTG + vehicle group.The pain threshold in the NTG + OT + L368,899 group was markedly decreased compared with the NTG + OT group.Repeated OT (Oxytocin, 20 µg/kg) treatments were quickly administered at 2 µL per nostril or the same volume of saline every two minutes using the tip of the pipette 30 min before NTG and then once daily at the same time point for 11 days.C57BL/6 mice weighing 20 ~ 30 g and 6 ~ 8 weeks of age.
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ACS Appl Mater Interfaces
Oxytocin Nanogels Inhibit Innate Inflammatory Response for Early Intervention in Alzheimer's Disease. [Abstract]2022 May 18;14(19):21822-21835. PMID: 35510352 -
Neurosci Bull
Sex Differences in Pain Contagion Determined by the Balance of Oxytocin and Corticosterone in the Anterior Cingulate Cortex in Rodents. [Abstract]2025 Aug 6. PMID: 40767942 -
CNS Neurosci Ther
Oxytocin Intervention Mitigates Pathological and Behavioral Impairments in APP/PS1 Mice Subjected to Early Social Isolation. [Abstract]2025 Jul;31(7):e70511. PMID: 40635450 -
Organogenesis
Tetramethylpyrazine Confers Protection Against Oxidative Stress and NLRP3-Dependent Pyroptosis in Rats with Endometriosis. [Abstract]2025 Dec;21(1):2460261. PMID: 39967390 -
Front Pharmacol
Intradermal Injection of Oxytocin Aggravates Chloroquine-Induced Itch Responses via Activating the Vasopressin-1a Receptor/Nitric Oxide Pathway in Mice. [Abstract]2019 Nov 15:10:1380. PMID: 31824317 -
Sci Rep
Characterization of five novel vasopressin V2 receptor mutants causing nephrogenic diabetes insipidus reveals a role of tolvaptan for M272R-V2R mutation. [Abstract]2020 Oct 2;10(1):16383. PMID: 33009446 -
Metabolites
Regulation of Human Renal Transporters by Pregnancy-Related Hormones in Primary Proximal Tubular Epithelial Cells. [Abstract]2026 Apr 24;16(5):292. PMID: 42188001 -
Psychoneuroendocrinology
Chronic intranasal oxytocin alleviates cognitive impairment and reverses oxytocin signaling upregulation in MK801-induced mice. [Abstract]2024 Oct:168:107138. PMID: 39068687
Oxytocin free acid purchased from MedChemExpress. Usage Cited in: Psychoneuroendocrinology. 2024 Oct:168:107138. [Abstract]
Expression of OT (Oxytocin) signaling related genes in the hippocampus. RT-PCR analysis were performed on brain tissues from the hippocampus. Con: control; Veh: Vehicle (Saline); RIS: Risperidone; LOT: Low dose (6 μg/kg) of OT; MOT: Medium dose (20 μg/kg) of OT; HOT: High dose (60 μg/kg) of OTAfter 1 week of acclimation, animals in the control group were administered saline (10 ml/kg) and those in the model group were administered MK801 (0.6 mg/kg) through intraperitoneal (i. p.) injections once a day for 21 days. One week after MK801 administration, 6 μg/kg OT (LOT group, n = 10), 20 μg/kg OT (MOT group, n = 10), or 60 μg/kg OT (HOT group, n = 10) was given through the i.n. route twice daily, at 8:30–9:30 AM and 4:00–5:00 PM, for 14 days. Saline (0.2 μL/g) was administered intranasally in the control and vehicle groups. Then, the mice received an i.p. injection of MK801 30 min after OT administration. The mice in the RIS group received an i.p. injection of 0.3 mg/kg RIS once daily for 14 days
Oxytocin free acid purchased from MedChemExpress. Usage Cited in: Psychoneuroendocrinology. 2024 Oct:168:107138. [Abstract]
Effects of chronic intranasal OT (Oxytocin) on levels of spontaneous activity and anxiety-like behaviors in MK801-induced mice Fig. A, the total distance traveled by the mice in the open field test. Fig. 2B, the ratio of distance traveled in the central versus peripheral zone by the mice in the open field test. Con: control; Veh: Vehicle (Saline); RIS: Risperidone; LOT: Low dose (6 μg/kg) of OT; MOT: Medium dose (20 μg/kg) of OT; HOT: High dose (60 μg/kg) of OTAfter 1 week of acclimation, animals in the control group were administered saline (10 ml/kg) and those in the model group were administered MK801 (0.6 mg/kg) through intraperitoneal (i.p.) injections once a day for 21 days. One week after MK801 administration, 6 μg/kg OT (LOT group, n = 10), 20 μg/kg OT (MOT group, n =10), or 60 μg/kg OT (HOT group, n = 10) was giventhrough the i.n. route twice daily, at 8:30–9:30 AM and 4:00–5:00 PM, for 14 days. Saline (0.2 μL/g) was administered intranasally in the control and vehicle groups. Then, the mice received ani.p. injection of MK801 30 min after OT administration. The mice in the RIS group received an i.p. injection of 0.3 mg/kg RIS once daily for 14 days.
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Am J Reprod Immunol
2024 Oct;92(4):e13938. PMID: 39403002 -
Neuroendocrinology
Excitatory effects of astrocytic hydrogen sulfide on the electrical activity of oxytocin neurons in the supraoptic nucleus. [Abstract]2023;113(3):343-360. PMID: 36044869 -
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Biomed Pharmacother
Bryophyllum pinnatum modulation of signaling pathways relevant for preterm labor in human myometrial cells. [Abstract]2025 Mar:184:117919. PMID: 39983434 -
Evid Based Complement Alternat Med
Guizhi Fuling Capsule Exhibits Antidysmenorrhea Activity by Inhibition of Cyclooxygenase Activity. [Abstract]2020 May 23:2020:8607931. PMID: 32595743
Purity & Documentation
References
[1]. Ferrier BM, et al. 9-Deamidooxytocin, an analog of the hormone containing a glycine residue in place of the glycinamide residue. J Med Chem. 1966;9(1):55-57. [Content Brief]
[2]. Carter CS, Kenkel WM, MacLean EL, et al. Is Oxytocin "Nature's Medicine"?. Pharmacol Rev. 2020;72(4):829-861. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)