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Autism metabolism study seeks clues to mood and memory

NCT ID NCT02733120

Knowledge-focused Sponsor: Texas A&M University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This completed study looked at how the body processes certain amino acids in people with autism compared to healthy volunteers. Researchers gave participants a special infusion of stable isotopes to track metabolism, and also tested their thinking and mood. The goal was to find links between metabolism and brain function that could lead to better ways to identify and help those at risk for mood or cognitive problems.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
stable isotope infusion
What this could lead to
If successful, this could help identify biological markers to predict mood or cognitive problems in people with autism, and guide future nutritional treatments.
What could go wrong
This is a small, early-stage observational study with only 40 participants. It does not test a treatment, so direct benefits are unlikely. Results may not apply to all people with autism.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

40 people

The number who actually took part.

Started

Dec 2015

Finished

Oct 2017

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

16 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria Healthy: * Healthy male or female according to the investigator's or appointed staff's judgment * Age 16 years or older * Ability to walk, sit down and stand up independently * Ability to lie in supine or elevated position for 4 hours * Willingness and ability to comply with the protocol Inclusion criteria subjects with Autism Spectrum Disorder (ASD): * Healthy high functioning person diagnosed with autism spectrum disorder * Age 16 years or older * Ability to walk, sit down and stand up independently * Ability to lie in supine or elevated position for 4 hours * Willingness and ability to comply with the protocol Exclusion Criteria: * Any condition that may interfere with the definition 'healthy subject' according to the investigator's judgment (for healthy group) * Failure to give informed consent * Established diagnosis of Insulin Dependent Diabetes Mellitus * Metabolic diseases, including hepatic or renal disorders * Presence of acute illness or metabolically unstable chronic illness * Presence of fever within the last 3 days * Pre-planned surgery of procedures that would interfere with the conduct of the study * Any other condition according to the PI or study physician that would interfere with proper conduct of the study / safety of the patient * Current alcohol or drug abuse * Use of protein or amino acid containing nutritional supplements within 5 days prior to the study days * Use of long-term oral corticosteroids or short course of oral cortico-steroids 4 weeks preceding first test day * Body Mass Index of \< 18.5 or ≥ 40 kg/m2 * Montreal Cognitive Assessment score of \< 20

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Conditions

The condition(s) this trial relates to.

autism spectrum disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Autism spectrum disorder

Contacts and locations

Locations

  • Texas A&M University-CTRAL

    College Station, Texas, 77843, United States

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