CClinicalTrials.gg
CompletedNCT01494194Updated Jun 8, 2015

Study to Evaluate the Potential of Air Structuring Protein to Elicit Allergic Reactions in Mold Sensitized People

An interventional study of Air Structuring Protein and Placebo sorbet in Allergy to Mold, sponsored by Unilever SEAC. Completed at 1 site in United Kingdom. Open to participants aged 18 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-06-08.

Sponsored by Unilever SEAC · Not applicable and Interventional

Phase
Not applicable
Study type
Interventional
Enrollment
252
Allocation
Randomized
Ages
18 Years to 60 Years
Sex
All
01

Study summary

Air Structuring Protein (ASP) is a small protein derived from a fungus which is already widely used to produce enzymes that are added to foods. ASP has the possibility of stabilising the air phase of ice-cream and therefore there is interest in ASP as a potential ice-cream ingredient.

Toxicological tests have also been carried out to further confirm the safety of the material and no evidence of genotoxicity or acute toxicity has been observed in any of the tests.

As part of the safety evaluation of a new protein for use in foods, the potential allergenicity is also investigated and Unilever is sponsoring a study to evaluate this aspect of ASP. This study will investigate:

  • Whether ASP has the potential to elicit a positive skin prick test (SPT) in a population of participants with proven sensitivity to mould.
  • Whether ASP is responsible for any positive SPT reactions, should they occur.
  • And if any positive SPT reactions to ASP occur, whether such reactions are clinically relevant with respect to food allergy.

The study is divided in three stages. In Stage 1 and Stage 2, the SPT is "open label," which means that both the participant and the study doctor will know which materials are being tested.

In Stage 3, the food challenge has a "crossover" design, meaning that participants will take one of the products (ASP or placebo [food containing no ASP]) during the first half of the study and the other treatment during the second half. The order of ASP and placebo will be decided randomly, like tossing a coin. To make the comparison between ASP and placebo as fair as possible, the food challenge is "double blinded." This means that neither the participant nor the study doctor will know which kind of products (ASP or placebo) the participant is taking.

This is a multi centre study which is taking place in the UK.

02

Conditions studied

  • Allergy to Mold

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Keywords

  • Mold sensitized
03

In context

Hypersensitivity

1,916 studies on the registry are indexed under Hypersensitivity; 265 are open to participants now.

This study's enrollment of 252 is above the median of 57 across 1,384 interventional studies indexed under Hypersensitivity.

Browse Hypersensitivity studies →

Lead sponsor

This is the only study on the registry with Unilever SEAC as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Males and females aged 18-60 years.
  • Mould sensitised subjects diagnosed according to the EAACI/Ga2len guidelines.
  • Written informed consent from the subject.
  • Normally active and otherwise judged to be in good health on the basis of medical history and screening assessment.
  • No allergic symptoms on the day of investigation.

Exclusion criteria

Exclusion Criteria:

  • Pregnancy or lactation.
  • Failure to comply with the protocol.
  • Medication that may interfere with wheal formation in the skin or response to DBPCFC
  • Participation in another clinical study involving a SPT within 30 days prior to Visit 1 or DBPCFC within 30 days prior to DBPCFC.
  • Current skin disease of any type (eczema, acne, dermatitis, etc.) on the test site(s).
  • Subjects with a condition the Investigator believes would interfere with the evaluation of the subject, including proceeding to DBPCFC, or may put the subject at undue risk, e.g., a history of anaphylactic reactions and history of reactions to any component of the DBPCFC matrix other than ASP.
05

Study design

Phase
Not applicable
Allocation
Randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
252 participants (actual)

Study arms

  • Placebo comparator
    placebo for food challenge

    Other: Placebo sorbet

  • Experimental
    ASP Skin prick solution

    Other: Air Structuring Protein

  • Experimental
    ASP sorbet

    Other: Air Structuring Protein

Interventions

  • OtherAir Structuring Protein

    A novel food protein preparation

  • OtherPlacebo sorbet

    Placebo sorbet for double blind placebo controlled food challenge

06

What researchers measure

Primary outcomes

  1. Positive skin prick test response to test material

    The number and size of positive SPTs will be recorded together with data of concomitant allergies and the minimum eliciting concentration (SPT-min) in the skin.

    Time frame: 15 minutes after application

Secondary outcomes

  1. The number of positive Double Blind Placebo Controlled Food Challenge reactions in those with positive skin prick test result

    The number of positive DBPCFC reactions will be recorded together with pre and post challenge blood pressure, pulse rate, peak expiratory flow (PEF) and forced expiratory volume (FEV1), data of concomitant allergies, any symptoms elicited including any late onset reactions, timing of symptoms and the minimum eliciting dose of ASP.

    Time frame: 2 hours after administration

07

Study locations

1 site
  • National Heart and Lung Institute, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, Centre for Respiratory Infection, Imperial College London
    London, W2 1PG, United Kingdom
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 8, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01494194
Lead sponsor
Unilever SEAC
Responsible party
Sponsor
First posted
Dec 16, 2011
Start date
Dec 2011
Primary completion
Jul 2012
Completion
Jul 2012
Last update
Jun 8, 2015

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jun 2015. You cannot join it, but the record below documents what was studied.

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