Intranasal Oxytocin for the Treatment of Autism Spectrum Disorders

Study Overview
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Brief Summary
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Autism Spectrum Disorder (ASD) is a developmental disorder characterized by abnormalities in speech and communication, impaired social functioning and repetitive behaviors and restricted interests. Oxytocin (OT) is peptide that is known for its peripheral effects on facilitating uterine contractions and milk let-down; however, studies, mainly with rodents and non-human primates, has found that OT is involved in affiliative behaviors, including sexual behavior, mother-infant and adult-adult pair-bond formation, separation distress, and other aspects of social attachment. Moreover, OT is known to play an important role in repetitive behaviors and stress reactivity. Given that repetitive behaviors and deficits in social interaction are core symptom domains of autism, and that OT is involved in the regulation of repetitive and affiliative behaviors, it is believed that OT may play a role in the etiology of autism. Moreover, preliminary data obtained by Hollander and colleagues suggests that OT may be of value in treating core autism symptoms. Specifically, synthetic oxytocin administered via intravenous infusion to adults with autism spectrum disorders (ASD) produced significant reductions in repetitive behaviors and facilitated social cognition/memory in a double-blind, placebo-controlled cross-over laboratory challenge. Encouraged by these findings, the primary aim of this study is to investigate the safety and therapeutic efficacy of intranasal OT in treating repetitive behaviors and social functioning/cognitive deficits in adults with ASD. This research embraces a translational approach to develop a novel treatment for core ASD symptoms; given that there are currently no Food and Drug Administration (FDA) approved medication treatments for core ASD symptoms, this research addresses an important unmet need in the field. The goal of this study is to evaluate the safety and efficacy of repeated Intranasal Oxytocin Treatment (INOT)administration in adults with ASD.

Official Title
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Intranasal Oxytocin for the Treatment of Autism Spectrum Disorders

Conditions
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Autism Spectrum Disorders

Intervention / Treatment
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* Drug: Intranasal Oxytocin
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and Female 18 to 55 years old Meet Diagnostic and Statistical Manual-IV (DSM-IV), Autism Diagnostic Observation Schedule(ADOS), and Autism Diagnostic Interview-Revised (ADI-R) standards for Autism Spectrum Disorder or Aspergers Syndrome Have a high, normal or near normal Intelligent Quotient Speak and Understand English fluently Exclusion Criteria: Born prior to 35 weeks gestational age Any primary psychiatric diagnosis other than autism at the time of screening Medical history of neurological disease Medical history of known MRI/structural lesion of the brain Patients who are pregnant With a medical condition that might interfere with the conduct of the study, confound interpretation of study results or endanger their own well being With evidence or history of malignancy or any significant hematological, endocrine, cardiovascular, respiratory, renal, hepatic or gastrointestinal disease Taking psychoactive medications Who plan to initiate or change nonpharmacologic interventions during the study course Who are unable to tolerate venipuncture procedures for blood sampling

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Oxytocin<br> | Drug: Intranasal Oxytocin<br>* Oxytocin administered intranasally twice a day via 1 12 unit puff to each nostril, totaling 48 IU a day.<br>|
| Placebo Comparator: Placebo<br> | Drug: Placebo<br>* Saline will be administered intranasally twice a day via 1 puff per nostril, totaling 48 IU a day.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With Improvement on the Clinical Global Impression-Improvement (CGI-I) Scale | Rating Scale that utilizes direct observation, scales and patient report to inform clinical judgment. A form of CGI that targets social functioning will be used as the primary outcome measure. Semi-structured interview. | 6 Weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Obsessive- Compulsive Behavior Based on Yale Brown Obsessive Compulsive Scale (YBOCS) | Clinician-Rated questionnaire measuring the time spent, distress,interference, resistance, and control in relation to obsessions and compulsions based on a 5 point scale ranging from 0-5 for each category with 0 being most desirable and 5 being least. Sub-scales are added and averaged to obtain total scores. -scale range (total): 0 - 40 total, 0 - 7 subclinical, 8-15 mild, 16 - 23 moderate, 24 - 31 severe, 32 - 40 extreme Questions are rated on a 5-point scale, 0-4, increasing in severity. Obsession Rating Subscale (5 questions, ranging from 0 - 20 total) and Compulsion Rating subscale (5 questions, ranging from 0 - 20 total) are totaled and added to obtain total scores. -score interpretation: Higher overall scores reflect increasing symptom severity. | Baseline, Week 6 | 
| Change in Repetitive Behavior Based Repetitive Behavior Scale - Revised (RBS-R) | Subscale ranges: stereotypic behavior (0 - 27);self-injurious behavior (0 - 24); compulsive behavior (0 - 18); ritualistic/Sameness Behavior (0 - 36); restricted Interests (0 - 9). Higher score in all subscales reflect increasing severity. Questions rate behaviors on a 4-point scale: 0 = does not occur; 1 = occurs, mild problem; 2 = occurs, moderate problem; 3 = occurs, severe problem. Subscale scores consist of sum of ratings within each question subset. Lower order behaviors-- stereotypy and self-injury, higher order behaviors--compulsions, rituals /sameness, restricted interests. Lower Order total range: 0-51, Higher Order total range: 0-63 Stereotypic behavior and Self-injurious behavior subscales were summed to create a total range for Lower Order behavior; and Compulsive behavior, ritualistic /sameness behavior, and restricted interests subscales were summed to create a total range for Higher Order behavior. | Baseline, week 6 | 
| Change in Facial Emotion Recognition Based on Diagnostic Analysis of Nonverbal Accuracy - 2 (DANVA-2) | A clinical tool measuring emotion recognition through facial expression, voice and posture. Child faces 2 (range 0 - 100, higher values reflecting higher % of errors) Adult faces 2 (range 0 - 100, higher values reflecting higher % of errors) Child paralanguage 2 (range 0 - 100, higher values reflecting higher % of errors) Adult paralanguage 2 (range 0 - 100, higher values reflecting higher % of errors) Errors are counted and organized by pre-determined affect and intensity. Subtests considered separately. | baseline, week 6 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Autism, Autism Spectrum Disorders, Oxytocin, Hollander, ASD, Asperger Syndrome, Asperger