Cited by 225Pancreatic function and diabetesAdipokines, Inflammation, and Metabolic DiseasesDiabetes Treatment and Management

Treatment of obesity and diabetes using oxytocin or analogs in patients and mouse models

Open access
Zhang, Hai, Wu, Chenguang, Chen, Qiaofen, Chen, Xiaoluo, Xu, Zhigang, Wu, Jing, Cai, Dongsheng·2013·PLoS ONE

Abstract

Obesity is important for the development of type-2 diabetes as a result of obesity-induced insulin resistance accompanied by impaired compensation of insulin secretion from pancreatic beta cells. Here, based on a randomized pilot clinical trial, we report that intranasal oxytocin administration over an 8-week period led to effective reduction of obesity and reversal of related prediabetic changes in patients. Using mouse models, we further systematically evaluated whether oxytocin and its analogs yield therapeutic effects against prediabetic or diabetic disorders regardless of obesity. Our results showed that oxytocin and two analogs including [Ser4, Ile8]-oxytocin or [Asu1,6]-oxytocin worked in mice to reverse insulin resistance and glucose intolerance prior to reduction of obesity. In parallel, using streptozotocin-induced diabetic mouse model, we found that treatment with oxytocin or its analogs reduced the magnitude of glucose intolerance through improving insulin secretion. The anti-diabetic effects of oxytocin and its analogs in these animal models can be produced similarly whether central or peripheral administration was used. In conclusion, oxytocin and its analogs have multi-level effects in improving weight control, insulin sensitivity and insulin secretion, and bear potentials for being developed as therapeutic peptides for obesity and diabetes.

Verified 2026-10-09 · 1 reference not checked yet

AI snapshot

Written from the paper’s full text.

TL;DR

In an 8-week randomized pilot trial, intranasal oxytocin reduced body weight and BMI and improved lipid profiles in obese non-diabetic patients, with no reported adverse effects. In mouse models, oxytocin and two analogs improved insulin sensitivity and insulin secretion independently of body-weight reduction, including after streptozotocin-induced beta-cell damage.

Key findings

  • In the clinical trial, intranasal oxytocin (24 units 4 times/day) for 8 weeks reduced body weight by 8.9±5.4 kg and BMI by 3.2±1.9 kg/m² versus baseline (P<0.001); 4-week weight reduction was 4.6±3.2 kg. Placebo produced no therapeutic effect against obesity (n=9 oxytocin, n=11 placebo).
  • Oxytocin treatment significantly reduced serum LDL and cholesterol and tended to increase HDL; no adverse effects were reported, and no cardiovascular, liver, or kidney dysfunction was found.
  • In high-fat-diet-fed prediabetic mice, central oxytocin and analogs improved glucose intolerance and fasting insulin levels without body-weight change; [Ser4, Ile8]-oxytocin had more pronounced effects than native oxytocin, while [Asu1,6]-oxytocin was comparable to oxytocin but weaker than [Ser4, Ile8]-oxytocin.
  • In streptozotocin-induced diabetic mice, central oxytocin and analogs improved glucose tolerance and insulin secretion (first- and second-phase GSIS) without body-weight changes; peripheral i.p. [Ser4, Ile8]-oxytocin also improved glucose tolerance in both high-fat-diet and streptozotocin models.

Methods

  • Randomized placebo-controlled pilot clinical trial (ChiCTR-TRC-12002884) in patients with obesity (BMI ≥28 kg/m²), ages 20–60, excluding diabetes; oxytocin nasal spray 24 units 4 times/day before three meals and sleep for 8 weeks versus saline placebo; outcomes included body weight, BMI, waist/hip circumference, glucose, insulin, lipids, and safety labs.
  • Mouse studies used C57BL/6 mice: high-fat-diet-induced prediabetes (2 months) and streptozotocin-induced diabetes (40 mg/kg i.p. for 4 days); oxytocin or analogs [Ser4, Ile8]-oxytocin and [Asu1,6]-oxytocin were given centrally via third-ventricle cannula or peripherally i.p.; assessments included glucose tolerance tests, fasting insulin ELISA, and glucose-stimulated insulin secretion.
  • Statistics used repeated measures, ANOVA with post hoc tests, and two-tailed Student’s t tests; clinical data are mean±SD, animal data mean±SEM, with P<0.05 considered significant.

Limitations

  • The paper states that future studies with larger samples and longer duration are needed to fully evaluate efficacy and side-effect profiles of oxytocin nasal spray; the clinical trial excluded diabetic patients, so whether oxytocin treats diabetes in an obesity-independent manner in humans remains to be tested; and the mouse experiments did not address underlying signaling mechanisms.
  • Evident from the text: the clinical sample was small (n=20 total) with baseline imbalances (oxytocin group younger, heavier, and with higher BMI/waist circumference than placebo), and animal groups were small (n=4–8) with short acute treatment periods.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1371/journal.pone.0061477

Cites

38 of 39 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 29 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    The anti-diabetic effects of oxytocin and its analogs in animal models can be produced similarly whether central or peripheral administration was used.

    “The anti-diabetic effects of oxytocin and its analogs in these animal models can be produced similarly whether central or peripheral administration was used.”
    Quote in the paperNot a substantial claim
  • Findingown data

    Oxytocin and two analogs including [Ser4, Ile8]-oxytocin or [Asu1,6]-oxytocin worked in mice to reverse insulin resistance and glucose intolerance prior to reduction of obesity.

    “oxytocin and two analogs including [Ser4, Ile8]-oxytocin or [Asu1,6]-oxytocin worked in mice to reverse insulin resistance and glucose intolerance prior to reduction of obesity.”
    Quote in the paperSubstantial claim
  • Findingown data

    In a streptozotocin-induced diabetic mouse model, treatment with oxytocin or its analogs reduced the magnitude of glucose intolerance through improving insulin secretion.

    “using streptozotocin-induced diabetic mouse model, we found that treatment with oxytocin or its analogs reduced the magnitude of glucose intolerance through improving insulin secretion.”
    Quote in the paperSubstantial claim
  • Findingown data

    Intranasal oxytocin administration over an 8-week period led to effective reduction of obesity and reversal of related prediabetic changes in patients.

    “intranasal oxytocin administration over an 8-week period led to effective reduction of obesity and reversal of related prediabetic changes in patients.”
    Quote in the paperSubstantial claim
  • Findingown data

    Placebo did not lead to a therapeutic effect against obesity in patients.

    “while placebo did not lead to a therapeutic effect against obesity”
    Quote in the paperSubstantial claim
  • May combine two claims. 15
  • The quote only partly states this claim. 1
  • Classified as probably not a substantial claim. 16
  • May combine two claims.

    Findingown data

    OXT treatment did not cause cardiovascular, liver or kidney dysfunctions.

    “OXT treatment did not cause any cardiovascular, liver or kidney dysfunctions”
    Quote in the paperSubstantial claim
  • The quote only partly states this claim.

    Findingown data

    In HFD-fed prediabetic mice, central OXT treatment significantly lowered fasting blood insulin levels.

    “and fasting blood insulin levels (Fig. 4B ) of mice”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Therapeutic effects of [Asu1,6]-OXT seemed comparable with OXT but weaker than [Ser4, Ile8]-OXT.

    “The therapeutic effects of [Asu1,6]-OXT seemed to be comparable with the effects of OXT (Fig. 4), but weaker than the effects of [Ser4, Ile8]-OXT (Fig. 5).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    OXT nasal spray effectively reversed obesity as well as obesity-related lipid disorders in patients with obesity.

    “our results showed that OXT nasal spray effectively reversed obesity as well as obesity-related lipid disorders.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Oxytocin and its analogs have multi-level effects in improving weight control, insulin sensitivity and insulin secretion, and bear potentials for being developed as therapeutic peptides for obesity and diabetes.

    “oxytocin and its analogs have multi-level effects in improving weight control, insulin sensitivity and insulin secretion, and bear potentials for being developed as therapeutic peptides for obesity and diabetes.”
    • Also stated in: § Introduction · plain
      “OXT and its analogs have multiple therapeutic effects including weight control, lipid lowering, insulin sensitization and insulin secretion, and thus have druggable potentials of being developed as a new class of small peptides for treating obesity as well as diabetes that is related or unrelated to obesity.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    DPP-4 inhibitors are effective in treating obesity and diabetes.

    “dipeptidyl peptidase-4 (DPP-4) inhibitors were developed to stabilize endogenous GLP-1, an approach which is effective in treating obesity and diabetes [2].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [2] RE Amori, 2007, Efficacy and safety of incretin therapy in type 2 diabetes: systematic review and meta-analysis, JAMA source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    GLP-1 is useful in controlling obesity as well as diabetes.

    “the clinical success of this concept has been evidenced by the usefulness of intestinal peptide glucagon-like peptide-1 (GLP-1) in controlling obesity as well as diabetes [1].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] M Briones, 2006, Exenatide: a GLP-1 receptor agonist as novel therapy for Type 2 diabetes mellitus, Expert Opin Pharmacother source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Combinational release and actions of multiple peptides including GLP-1 may account for the profound effects of bariatric surgery in treating obesity and diabetes.

    “combinational release and actions of multiple peptides including GLP-1 may account for, at least partly, the profound effects of bariatric surgery in treating obesity and diabetes [3].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [3] JQ Purnell, 2009, Bariatric surgery and diabetes: who should be offered the option of remission?, JAMA source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The obesity-independent hypoglycemic effect of bariatric procedures has been related to the action of GLP-1 in promoting insulin secretion.

    “this obesity-independent hypoglycemic effect has been related to the action of GLP-1 in promoting insulin section [3], [6].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [3] JQ Purnell, 2009, Bariatric surgery and diabetes: who should be offered the option of remission?, JAMA source

      Not checked in the free run.

    • cites [6] B Laferrere, 2008, Effect of weight loss by gastric bypass surgery versus hypocaloric diet on glucose and incretin levels in patients with type 2 diabetes, J Clin Endocrinol Metab source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    All animal procedures were approved by the Institutional Animal Care and Use Committee (IACUC) at the Albert Einstein College of Medicine.

    “All animal procedures were approved by the Institutional Animal Care and Use Committee (IACUC) at the Albert Einstein College of Medicine.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Written informed consent was given to each patient.

    “Written informed consent was given to each patient.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    Sample size was estimated using standard method and biomedical information, predicting effect rate greater than 50% in the OXT group and less than 15% in the placebo group, with 80% power, α = 0.05, and ∼25% dropout.

    “Estimate of sample size was determined using standard method and biomedical information. We predicted that the effect rate in OXT treatment group was greater than 50%, and the effect rate in placebo group was less than 15%. The settings of 80% power and α = 0.05 were used, and ∼25% dropout was estimated.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductown data

    Patients were randomly assigned into OXT vs. placebo groups by clinicians/research assistants without being involved in study design or outcome/data analyses.

    “patients were recruited and randomly assigned into OXT vs. placebo (saline) treatment groups by clinicians/research assistants without being involved in study design or outcome/data analyses.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    The study was conducted in accordance with the Declaration of Helsinki, Good Clinical Practice guidelines, and other relevant regulations.

    “conducted in accordance with the Declaration of Helsinki, Good Clinical Practice guidelines, and other relevant regulations by the People's Republic of China.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    The clinical study was registered through Chinese Clinical Trial Register (ChiCTR-TRC-12002884).

    “This was a pilot clinical study registered through Chinese Clinical Trial Register (ChiCTR-TRC-12002884)”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Statistical analyses were performed by investigators who did not have access to patients and were blind to the information during the entire course of the study.

    “Statistical analyses were performed by investigators who did not have access to patients and were blind to the information during the entire course of the study.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Study protocol and informed consent form were approved by the Ethics Committee of the affiliated People's Hospital of Jiangsu University.

    “Study protocol and informed consent form were approved by the Ethics Committee of the affiliated People’s Hospital of Jiangsu University.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    [Ser4, Ile8]-OXT contains a glutamine to serine substitution at amino acid position 4 predicted to strengthen α-helical structure and stabilize peptide conformation and thus increase drug duration.

    “it contains glutamine to serine substitution at amino acid position 4 which is predicted to strengthen α-helical structure and stabilize peptide conformation [20] and thus increase drug duration.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [20] B Forood, 1993, Stabilization of alpha-helical structures in short peptides via end capping, Proc Natl Acad Sci U S A source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    [Asu1,6]-OXT was reported to have 70% activity of native OXT.

    “an OXT analog which was reported to have 70% activity of native OXT [21].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [21] T Yamanaka, 1970, Crystalline deamino-dicarba-oxytocin. Preparation and some pharmacological properties, Mol Pharmacol source

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    OXT and its analogs can work in the brain to independently improve systemic insulin sensitivity and insulin secretion and thereof counteract against diabetes.

    “The above studies suggested that in addition to obesity control, OXT and its analogs can work in the brain to independently improve systemic insulin sensitivity and insulin secretion and thereof counteract against diabetes.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    OXT has recently been found to be important for social recognition, pair bonding, love and care in mammals and for mental and emotional well-being in humans.

    “OXT has recently been found to be important for social recognition, pair bonding, love and care in mammals and for mental and emotional well-being in humans [8]-[13].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [8]-[13]

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    The benefits of OXT in treating metabolic diseases are multi-faceted, ranging from obesity control to body weight-independent improvements of insulin sensitivity and insulin secretion.

    “the benefits of OXT in treating metabolic diseases are multi-faceted, range from obesity control to body weight-independent improvements of insulin sensitivity and insulin secretion.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    OXT is currently under clinical trials for diseases such as autism, anxiety disorder, depression, drug abuse, and schizophrenia.

    “OXT is currently under clinical trials for diseases such as autism, anxiety disorder, depression, drug abuse, and schizophrenia [33], [34].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [33] A Meyer-Lindenberg, 2011, Oxytocin and vasopressin in the human brain: social neuropeptides for translational medicine, Nat Rev Neurosci source

      Not checked in the free run.

    • cites [34] D Feifel, 2012, Oxytocin as a potential therapeutic target for schizophrenia and other neuropsychiatric conditions, Neuropsychopharmacology source

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    OXT and its analogs have the actions to reverse insulin resistance and improve insulin secretion in mouse models of HFD-induced prediabetes or STZ-induced diabetes.

    “Our data proved that OXT and its analogs have the actions to reverse insulin resistance and improve insulin secretion in these mouse models.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Our experiments in this work did not address the underlying signaling mechanisms.

    “our experiments in this work did not address the underlying signaling mechanisms”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Brain actions of OXT are crucial for a battery of neuropsychiatric activities in both genders such as sociality, pair bonding, emotion, trust, love and care.

    “recent neurobiological research revealed that brain actions of OXT are crucial for a battery of neuropsychiatric activities in both genders such as sociality, pair bonding, emotion, trust, love and care [8]-[13].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [8]-[13]

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Mental dysfunctions represent a type of risk factors for the development of obesity and diabetes, which probably involves certain brain alterations of metabolic control in addition to issues such as poor lifestyle and nutrition management.

    “mental dysfunctions represent a type of risk factors for the development of obesity and diabetes, which probably involves certain brain alterations of metabolic control in addition to the issues such as poor lifestyle and nutrition management [36]-[38].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [36]-[38]

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    OXT has social-neuropsychiatric benefits which can possibly aid to control metabolic disease.

    “OXT has social-neuropsychiatric benefits which can possibly aid to control metabolic disease.”
    Quote in the paperNot a substantial claim
28 of 28
  • The paper relies on this without support.

    Obesity in humans is associated with pre-type 2 diabetes changes such as glucose intolerance, insulin resistance and hyperlipidemia.

    “Clinical epidemiology has established that obesity in humans is associated with pre-type 2 diabetes (T2D) changes such as glucose intolerance, insulin resistance and hyperlipidemia.”
  • The paper relies on this without support.

    Drug delivery via brain injection is impractical in humans.

    “given that drug delivery via brain injection is impractical in humans”
  • The paper relies on this without support.

    Peripherally delivered peptides often cannot effectively reach the central sites due to the physical and biological blockade of the blood-brain barrier.

    “peripherally delivered peptides often cannot effectively reach the central sites due to the physical and biological blockade of the BBB.”
  • The paper relies on this without support.

    Type 2 diabetes develops when insulin secretion is impaired to a level that cannot compensate for systemic insulin resistance, and obesity can potentiate the progression of both insulin resistance and impaired insulin secretion.

    “T2D develops when insulin secretion is impaired to a level that cannot compensate for systemic insulin resistance, and the presence of obesity can potentiate the progression of both insulin resistance and impaired insulin secretion.”
4 of 4

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Preclinical studies indicate that oxytocin has positive metabolic effects.

    “Preclinical studies indicate that oxytocin has positive metabolic effects(11, 12).”

    From Oxytocin reduces caloric intake in men (2015) · cites this paper as [12]

  • A small study of obese men and women found that intranasal oxytocin four times per day led to weight loss of nearly 20 lbs over eight weeks.

    “A small study of obese men and women found that intranasal oxytocin four times per day led to weight loss of nearly 20 lbs over eight weeks(12).”

    From Oxytocin reduces caloric intake in men (2015) · cites this paper as [12]

  • In obese mice, oxytocin reduces fasting insulin secretion and insulin resistance and improves glucose tolerance prior to a change in weight.

    “In obese mice, oxytocin reduces fasting insulin secretion and insulin resistance and improves glucose tolerance prior to a change in weight(12).”

    From Oxytocin reduces caloric intake in men (2015) · cites this paper as [12]

  • Zhang et al. did not show effects of sustained intranasal oxytocin on fasting insulin or glucose levels in a small study of nondiabetic obese men and women.

    “However, Zhang et al. did not show effects of sustained intranasal oxytocin on fasting insulin or glucose levels in a small study of nondiabetic obese men and women(12).”

    From Oxytocin reduces caloric intake in men (2015) · cites this paper as [12]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Figure 10 gives a different peripheral dosing schedule

    Minor

    The methods specify two injections for HFD-fed mice, one at the start of an overnight fast and one before the GTT the next morning. The Figure 10 caption instead describes daily injections, implying an ongoing schedule rather than the stated two-dose experiment.

1 of 1

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Authors
Zhang, H., Wu, C., Chen, Q., Chen, X., Xu, Z., Wu, J., & Cai, D.
Affiliations
  • Jiangsu University (CN)
  • Albert Einstein College of Medicine (US)
Corresponding author
Cai, Dongsheng
Venue
PLoS ONE
Published
2013-05-20
Volume
8
Issue
5
Pages
e61477
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2076652575
Cited by
224
References
39
Citations by year
2026: 7 · 2025: 7 · 2024: 9 · 2023: 14 · 2022: 14 · 2021: 24 · 2020: 17 · 2019: 23 · 2018: 30 · 2017: 27 · 2016: 23 · 2015: 13 · 2014: 14 · 2013: 2
FWCI
17.07
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • National Institutes of Health (DK078750)
  • National Institute on Aging (R01AG031774)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK078750)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
oxytocin, oxytocin analogues, obesity, type 2 diabetes, prediabetes, insulin resistance, insulin secretion, impaired glucose tolerance, intranasal administration, streptozotocin-induced diabetes, weight management, peptide therapeutics
MeSH terms
Insulin Secretion, Administration, Intranasal, Adult, Animals, Blood Glucose, Diabetes Mellitus, Experimental, Diabetes Mellitus, Type 2, Female, Humans, Hypoglycemic Agents, Insulin, Insulin Resistance, Male, Mice, Inbred C57BL, Middle Aged, Obesity, Oxytocin, Pilot Projects, Prediabetic State, Glucose Intolerance, Lipid Metabolism, Mice, Young Adult

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