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Scientists track how allergies fade away naturally

NCT ID NCT01992835

Knowledge-focused Sponsor: University Hospital, Strasbourg, France 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study looked at how the body naturally stops allergic inflammation after being exposed to grass pollen. Researchers measured specific molecules in the nose that help control and resolve the allergic response. Twenty adults with grass pollen allergies participated. The goal was to understand the timing of these natural healing processes, not to test a new treatment.

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

20 people

The number who actually took part.

Start date

Nov 2013

Finished

Apr 2014

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

18 to 55 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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.

Eligibility criteria: Inclusion Criteria * Allergic rhinitis during the grass pollen season with or without asthma, with at least one of the following symptoms: nasal congestion, itching, rhinorrhea, sneezing * Grass pollen sensitization determined by a positive skin prick test and / or presence of specific IgEs to a grass pollen allergen extract Exclusion Criteria: * Smoker * Specific immunotherapy with grass allergens or other respiratory allergen for inclusion. * Current exhibition to another clinically relevant respiratory allergen

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Conditions

The condition(s) this trial relates to.

seasonal allergic rhinitis

As listed by the trial registrant

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

Grass pollen allergic rhinitis

Contacts and locations

Locations

  • Hôpitaux Universitaires

    Strasbourg, 67091, France