Allergy;FoodAPSISNCT04604912
Biomarkers in Food Allergy Diagnosis
An observational study of Allergy;Food, run by Luxembourg Institute of Health at 2 sites in Luxembourg.
Trial summary
Food allergy is a global burden, affecting patients, society as a whole and the economy. For most common food allergies, patients synthesize specific IgE-antibodies against harmless food proteins. Clinical phenotypes of food-allergic patients are highly diverse. Read more about this study
- Who is it for?
- Ages 2 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Allergy;Food
- How many people
- 74 participants
- Where
- 2 sitesLuxembourg
- Study dates
- 1 Sep 2017to 31 Dec 2023
- How long will I take part?
- 1 Day
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 2 to 70 years
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: Peanut-allergic individuals (N=30) and tolerant controls (N=20). Among the allergic patients, up to 10 allergic individuals of age 2-5 will be included.
Who may be able to join
- 2-70 years
- male or female
- Allergic to peanut (assessed by anamnesis, skinreactivity testing, sera testing for specific IgE)
- Sign an Informed Consent
- Diagnostic food challenge scheduled
- Adults
Show all 9Show fewer
- male or female
- Sign an Informed Consent
- Tolerance to peanuts and fish (IgE-titer < 0.10 kUA/L)
Who cannot join
- Significant co-morbidity
- Medical treatment by nonsteroidal anti-inflammatory drugs oraspirin, chronic treatment with beta-blockers,angiotensin-converting enzyme inhibitors, use ofantihistamines within 5 days of oral food challenge and oral corticosteroids within 14 days prior to the challenge
- Medical unfit for challenge (e.g : fever,unwell with intercurrent illness)
- Pregant women
- Unbalanced asthma
- Severe food-induced anaphylaxis
Show all 15Show fewer
- For the control cohort :
- Pregnancy
- Medical unfit for challenge (e.g : fever, unwell with intercurrent illness),
- Unbalanced asthma
- Treatment by nonsteroidal anti-inflammatory drugs or aspirin
- Chronic treatment with beta-blockers, angiotensin-converting enzyme inhibitors
- Use of antihistamines within 5 days of oral food challenge
- Oral corticosteroids within 14 days prior to the challenge
- Risk of severe food-induced anaphylaxis in highly sensitized peanut-allergic patients
Trial locations and contacts
2 sites in 1 country.
Luxembourg2 sites
Luxembourg Institute of Health
Esch-sur-Alzette, 4354
Centre Hospitalier Luxembourg
Luxembourg, 1210
About this study
Official title: Multi-omics Endotyping of Food-allergic Patients For Advanced Biomarker Discovery
Food allergy is a global burden, affecting patients, society as a whole and the economy. For most common food allergies, patients synthesize specific IgE-antibodies against harmless food proteins. Clinical phenotypes of food-allergic patients are highly diverse. Differences in medical symptoms (organs, severity, delay), threshold and cross-reactivity levels suggest variable underlying endotypes.
The aim of this study is to identify phenotypic biomarkers for advanced stratification of food-allergic patients. Our study will consist of up to 50 participants (30 food-allergic, 20 tolerant), recruited in Luxembourg. Clinical samples will be collected before, during and after the event of a double-blind placebo-controlled food challenge for patients. Multi-omics analyses of blood (sera, peripheral blood mononuclear cell, basophils) and stool will allow a deeper understanding of the underlying immune mechanisms, including allergen metabolism aspects, as well as the functional gut microbiome. Deciphering these basic aspects during the present pilot study is expected to pave the way towards novel personalized medicine approaches for diagnosing and treating of food-allergic individuals.
This study is a cooperation project between the Centre Hospitalier de Luxembourg (CHL), the Luxemburg Institute of Health (LIH), the University of Luxembourg and the Integrated Biobank of Luxemburg (IBBL).
Read the detailed description
Background. Food allergies are a global burden causing severe clinical reactions including fatal anaphylaxis. Peanuts are counted among the most potent elicitors involved in IgE-mediated food allergies. Peanut allergy is a relevant disease model because of its steadily increasing prevalence and poor prognosis of outgrowth. Clinical phenotypes of peanut-allergic patients are highly variable. Patients might experience variable medical symptoms (organs, severity, delay), threshold and cross-reactivity levels suggest. Reliable in-vitro biomarker allowing to predict clinical reactivity and score the patients into reaction endotypes are missing.
Most important peanut allergens have been studied as to their biomolecular properties biological activities and allergenic potency. The pronounced protein stability of potent peanut allergens is thought to contribute to the molecules' allergenicity. Upon ingestion, food proteins are broken down, entering the human body via epithelial surfaces. The identity and the fate of immunologically active allergen peptides after epithelial absorption remains elusive. Beyond this, complex immune cascades take place during acute allergic episodes. How immune cells, such as lymphocytes, orchestrate in patients with different clinical outcomes (e.g., sensitivity, severity) still remains to be solved. Several studies have shown that the composition and the diversity of the gut microbiota is relevant for shaping the immune response to food proteins. The functional interaction between host and gut microbiome, in the context of symptom development and phenotypic variations, is unexplored until today.
Aims. This project aims to explore putative biomarkers at various levels, at the level of IgE-profiles, at the level of allergen absorption, at the level of scored basophil reactivity, at the level of immune phenotypes and at the level of gut microbiome-host interactions, by applying multiple omics technologies.
Partners. The Luxembourg Institute of Health (LIH), Department of Infection and Immunity (DII; head Prof. M. Ollert) has the scientific project lead (Principal Investigator Dr. A. Kuehn). Main clinical partners are Dr. F. Codreanu-Morel from the National Unit of Immunology-Allergology, Centre Hospitalier (CHL), Luxembourg, as well as Prof. C. Bindslev-Jensen from Odense Research Centre for Anaphylaxis (ORCA), Denmark. Partner for the execution of the clinical part will be the Clinical and Epidemiological Investigation Center (CIEC, LIH) headed by Dr. M. Gantenbein. The Integrated Biobank of Luxembourg (IBBL) will prepare and store clinical samples until use. Clinical samples (blood, sera, plasma) will be analyzed at DII, LIH. Stool samples will be investigated with the help of Prof. P. Wilmes from the Systems Ecology research group, Luxembourg Centre for Systems Biomedicine (LCSB).
Project implementation. Food challenges (OFC) to peanut will be proceeded according to official guidelines (European Academy of Allergy and Clinical Immunology, EAACI). Healthy controls (N=10) will be split, half will receive a single food dose of up to 100 g of roasted peanuts (open OFC) and the other half will be tested with up to 5 incremental doses (double-blind placebo-controlled OFC) using the same doses as for allergic patients. For single-dose OFC, blood samples from controls will be taken before the OFC and at 30 minutes, at 60 minutes and at 120 minutes. Controls receiving 5 incremental allergen doses will be subjected to blood sampling before the beginning of the OFC and 1 h after the end of the challenge. As a further control arm in the study, allergenic food from animal origin will be used in OFC. Further healthy controls (N=10) will receive either a single food dose of up to 200 g of cooked fish (open OFC) and the other half will be tested with up to 5 incremental doses (double-blind placebo-controlled OFC). Doses in a range of 10 mg to 100 g of fish will be selected for the blinded OFC with controls.
Allergic participants (N=30) will ingest incremental doses of peanuts. The OFC doses will be in the range of 5 mg, 15 mg, 60 mg, 120 mg, 200 mg, 390 mg, 790 mg, 1,580 mg, 3,160 mg and 5,530 mg of roasted peanut. Maximum five doses will be selected from the above mentioned ranges of peanut doses. Upon observation of allergic symptoms, the OFC will be stopped. If no allergic symptoms occurred during a food challenge with five incremental doses, the patient will be asked to participate in a second oral provocation (min. 14 days later) in order to undergo a test with higher allergen doses. Blood samples from allergic study participants will be drawn prior, during and after OFC (0, 60, 150, 180 minutes).
Stool samples from peanut-allergic participants (n=30) and healthy controls (n=20) will be collected earliest 2 months after the food challenge. Prior sampling, participants should not have used antibiotics within the last month, or have recent/ongoing gastrointestinal symptoms (= diarrhea; Bristol scale 5-7) at the time of stool collection. Participants will receive a collection kit at home, containing special sampling tubes, gloves and instructions. In addition, patients are asked to record their food intake for the last 24 hours before sampling.
Collected clinical samples will be pseudonymized at the clinical centers. A synonym list, as part of the investigator file, containing the information on the participants' identity and the corresponding pseudonym, will be available at the clinical center only (medical investigators) and at CIEC. Personal data is protected under the regulation (EU) 2016/679 of 27 April 2016 on the protection of individuals with regard to the processing of personal data (GDPR) and the law of 1 August 2018 on the organization of the National Data Protection Commission and the General Data Protection Act.
- Conditions
- Allergy;Food
- Keywords
- Peanut allergy, Active peptides, Oral food challenge, Immune cell phenotyping, Microbiome
- Medical subject headings
- Food Hypersensitivity, Peanut Hypersensitivity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Peanut-allergic patients' group | The aim is to include 30 patients with peanut allergy. Those patients will undergo diagnostic food challenges (incremental doses) while blood will be samples before, during and after the testing. The patients will receive standard of care during and after the challenge. Allergic symptoms will be treated according to established guidelines. | |
| Control group | The aim is to include 20 control participants, 10 peanut-tolerant and 10 fish-tolerant individuals. Those participants will undergo diagnostic food challenges (incremental or single doses) while blood will be samples before, during and after the testing. Same safety measures will be applied for food challenges of control individuals, as for the allergic patients. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in peripheral allergen peptides (serum samples) across food allergen uptake
Abundance of allergen peptides as detected through mass spectrometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls
Measured: Samples analyzed through study completion, an average of 3 months
Change in in-vitro basophil reactivity profiles (cells sampled before food challenge) using defined food allergen peptides across different peptides mixes and peptide concentrations
Reactivity of effector cells by dose-dependent activation (%-CD63+ CCR3+basophils) and flow cytometry measurement. Main comparison will be within the group of food-allergic patients, aligning patients with high/low reactivity and high/low sensitivity of basophils.
Measured: Samples analyzed through study completion, an average of 3 months
Change of immune cell phenotypes across food allergen uptake
Abundance and function of immune cells as detected through single-cell mass cytometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Measured: Samples analyzed through study completion, an average of 3 months
Change in Cytokine release
Cytokine quantification through multiplex immunoassays. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Measured: Samples analyzed through study completion, an average of 3 months
Baseline characteristics of the functional gut microbiome in food-allergic patients
DNA, RNA, protein and metabolite profiling using a multi-omics approach through 16S RNA sequencing, unbiased high resolution method of metagenomics shotgun sequencing and transcriptomic analysis (Illumina MiSeq \& NextSeq) as well as metabolomic analysis (gas chromatography-mass spectrometry/liquid chromatography-mass spectrometry). In addition, microbial component analysis by antibody-specific immunoassays and flow cytometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Measured: Samples analyzed through study completion, an average of 2 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Oct 2020
- Study start1 Sep 2017
- Primary completion31 Dec 2023
- Study completion31 Dec 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Allergy;FoodStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 74 participants (actual)
- Target duration
- 1 Day
Sponsor and investigators
- Lead sponsor
- Luxembourg Institute of Health
- Sponsor type
- Other government
- Collaborators
- Centre Hospitalier du Luxembourg, Odense University Hospital, Technical University of Munich, University of Luxembourg, Integrated Biobank of Luxembourg
- Responsible party
- Sponsor
- Investigators
- Annette Kuehn, PhD, Principal investigator, Luxembourg Institute of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04604912
- Sponsor's protocol ID
- APSIS
- Acronym
- APSIS
- Status last verified
- Mar 2024
- First submitted
- 30 Sep 2020
- Last updated
- 8 Mar 2024
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Muraro A, Lemanske RF Jr, Castells M, Torres MJ, Khan D, Simon HU, Bindslev-Jensen C, Burks W, Poulsen LK, Sampson HA, Worm M, Nadeau KC. Precision medicine in allergic disease-food allergy, drug allergy, and anaphylaxis-PRACTALL document of the European Academy of Allergy and Clinical Immunology and the American Academy of Allergy, Asthma and Immunology. Allergy. 2017 Jul;72(7):1006-1021. doi: 10.1111/all.13132. Epub 2017 Apr 12.
PubMed 28122115Matricardi PM, Kleine-Tebbe J, Hoffmann HJ, Valenta R, Hilger C, Hofmaier S, Aalberse RC, Agache I, Asero R, Ballmer-Weber B, Barber D, Beyer K, Biedermann T, Bilo MB, Blank S, Bohle B, Bosshard PP, Breiteneder H, Brough HA, Caraballo L, Caubet JC, Crameri R, Davies JM, Douladiris N, Ebisawa M, EIgenmann PA, Fernandez-Rivas M, Ferreira F, Gadermaier G, Glatz M, Hamilton RG, Hawranek T, Hellings P, Hoffmann-Sommergruber K, Jakob T, Jappe U, Jutel M, Kamath SD, Knol EF, Korosec P, Kuehn A, Lack G, Lopata AL, Makela M, Morisset M, Niederberger V, Nowak-Wegrzyn AH, Papadopoulos NG, Pastorello EA, Pauli G, Platts-Mills T, Posa D, Poulsen LK, Raulf M, Sastre J, Scala E, Schmid JM, Schmid-Grendelmeier P, van Hage M, van Ree R, Vieths S, Weber R, Wickman M, Muraro A, Ollert M. EAACI Molecular Allergology User's Guide. Pediatr Allergy Immunol. 2016 May;27 Suppl 23:1-250. doi: 10.1111/pai.12563.
PubMed 27288833Bunyavanich S, Berin MC. Food allergy and the microbiome: Current understandings and future directions. J Allergy Clin Immunol. 2019 Dec;144(6):1468-1477. doi: 10.1016/j.jaci.2019.10.019.
PubMed 31812181Costa J, Bavaro SL, Benede S, Diaz-Perales A, Bueno-Diaz C, Gelencser E, Klueber J, Larre C, Lozano-Ojalvo D, Lupi R, Mafra I, Mazzucchelli G, Molina E, Monaci L, Martin-Pedraza L, Piras C, Rodrigues PM, Roncada P, Schrama D, Cirkovic-Velickovic T, Verhoeckx K, Villa C, Kuehn A, Hoffmann-Sommergruber K, Holzhauser T. Are Physicochemical Properties Shaping the Allergenic Potency of Plant Allergens? Clin Rev Allergy Immunol. 2022 Feb;62(1):37-63. doi: 10.1007/s12016-020-08810-9.
PubMed 32876924Jappe U and Kuehn A. Neues zu diagnostisch relevanten Einzelallergenen aus pflanzlichen und tierischen Nahrungsmittelallergenquellen. Allergologie 2016; 39: 425-438. doi: 10.5414/ALX01885.
Study at a glance
From the registry record, last updated by the sponsor on 8 Mar 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Multi-omics Endotyping of Food-allergic Patients For Advanced Biomarker Discovery
- ClinicalTrials.gov ID
- NCT04604912
- Acronym / sponsor ID
- APSIS / APSIS
- Conditions
- Allergy;Food
- Keywords
- Peanut allergy, Active peptides, Oral food challenge, Immune cell phenotyping, Microbiome
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 74 participants (actual)
- Lead sponsor
- Luxembourg Institute of HealthOther government
- Collaborators
- Centre Hospitalier du Luxembourg, Odense University Hospital, Technical University of Munich, University of Luxembourg, Integrated Biobank of Luxembourg
- Study start
- 1 Sep 2017 (actual)
- Primary completion
- 31 Dec 2023 (actual)
- Study completion
- 31 Dec 2023 (actual)
- First posted
- 27 Oct 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Food allergy is a global burden, affecting patients, society as a whole and the economy. For most common food allergies, patients synthesize specific IgE-antibodies against harmless food proteins. Clinical phenotypes of food-allergic patients are highly diverse. Differences in medical symptoms (organs, severity, delay), threshold and cross-reactivity levels suggest variable underlying endotypes.
The aim of this study is to identify phenotypic biomarkers for advanced stratification of food-allergic patients. Our study will consist of up to 50 participants (30 food-allergic, 20 tolerant), recruited in Luxembourg. Clinical samples will be collected before, during and after the event of a double-blind placebo-controlled food challenge for patients. Multi-omics analyses of blood (sera, peripheral blood mononuclear cell, basophils) and stool will allow a deeper understanding of the underlying immune mechanisms, including allergen metabolism aspects, as well as the functional gut microbiome. Deciphering these basic aspects during the present pilot study is expected to pave the way towards novel personalized medicine approaches for diagnosing and treating of food-allergic individuals.
This study is a cooperation project between the Centre Hospitalier de Luxembourg (CHL), the Luxemburg Institute of Health (LIH), the University of Luxembourg and the Integrated Biobank of Luxemburg (IBBL).
Detailed description
Background. Food allergies are a global burden causing severe clinical reactions including fatal anaphylaxis. Peanuts are counted among the most potent elicitors involved in IgE-mediated food allergies. Peanut allergy is a relevant disease model because of its steadily increasing prevalence and poor prognosis of outgrowth. Clinical phenotypes of peanut-allergic patients are highly variable. Patients might experience variable medical symptoms (organs, severity, delay), threshold and cross-reactivity levels suggest. Reliable in-vitro biomarker allowing to predict clinical reactivity and score the patients into reaction endotypes are missing.
Most important peanut allergens have been studied as to their biomolecular properties biological activities and allergenic potency. The pronounced protein stability of potent peanut allergens is thought to contribute to the molecules' allergenicity. Upon ingestion, food proteins are broken down, entering the human body via epithelial surfaces. The identity and the fate of immunologically active allergen peptides after epithelial absorption remains elusive. Beyond this, complex immune cascades take place during acute allergic episodes. How immune cells, such as lymphocytes, orchestrate in patients with different clinical outcomes (e.g., sensitivity, severity) still remains to be solved. Several studies have shown that the composition and the diversity of the gut microbiota is relevant for shaping the immune response to food proteins. The functional interaction between host and gut microbiome, in the context of symptom development and phenotypic variations, is unexplored until today.
Aims. This project aims to explore putative biomarkers at various levels, at the level of IgE-profiles, at the level of allergen absorption, at the level of scored basophil reactivity, at the level of immune phenotypes and at the level of gut microbiome-host interactions, by applying multiple omics technologies.
Partners. The Luxembourg Institute of Health (LIH), Department of Infection and Immunity (DII; head Prof. M. Ollert) has the scientific project lead (Principal Investigator Dr. A. Kuehn). Main clinical partners are Dr. F. Codreanu-Morel from the National Unit of Immunology-Allergology, Centre Hospitalier (CHL), Luxembourg, as well as Prof. C. Bindslev-Jensen from Odense Research Centre for Anaphylaxis (ORCA), Denmark. Partner for the execution of the clinical part will be the Clinical and Epidemiological Investigation Center (CIEC, LIH) headed by Dr. M. Gantenbein. The Integrated Biobank of Luxembourg (IBBL) will prepare and store clinical samples until use. Clinical samples (blood, sera, plasma) will be analyzed at DII, LIH. Stool samples will be investigated with the help of Prof. P. Wilmes from the Systems Ecology research group, Luxembourg Centre for Systems Biomedicine (LCSB).
Project implementation. Food challenges (OFC) to peanut will be proceeded according to official guidelines (European Academy of Allergy and Clinical Immunology, EAACI). Healthy controls (N=10) will be split, half will receive a single food dose of up to 100 g of roasted peanuts (open OFC) and the other half will be tested with up to 5 incremental doses (double-blind placebo-controlled OFC) using the same doses as for allergic patients. For single-dose OFC, blood samples from controls will be taken before the OFC and at 30 minutes, at 60 minutes and at 120 minutes. Controls receiving 5 incremental allergen doses will be subjected to blood sampling before the beginning of the OFC and 1 h after the end of the challenge. As a further control arm in the study, allergenic food from animal origin will be used in OFC. Further healthy controls (N=10) will receive either a single food dose of up to 200 g of cooked fish (open OFC) and the other half will be tested with up to 5 incremental doses (double-blind placebo-controlled OFC). Doses in a range of 10 mg to 100 g of fish will be selected for the blinded OFC with controls.
Allergic participants (N=30) will ingest incremental doses of peanuts. The OFC doses will be in the range of 5 mg, 15 mg, 60 mg, 120 mg, 200 mg, 390 mg, 790 mg, 1,580 mg, 3,160 mg and 5,530 mg of roasted peanut. Maximum five doses will be selected from the above mentioned ranges of peanut doses. Upon observation of allergic symptoms, the OFC will be stopped. If no allergic symptoms occurred during a food challenge with five incremental doses, the patient will be asked to participate in a second oral provocation (min. 14 days later) in order to undergo a test with higher allergen doses. Blood samples from allergic study participants will be drawn prior, during and after OFC (0, 60, 150, 180 minutes).
Stool samples from peanut-allergic participants (n=30) and healthy controls (n=20) will be collected earliest 2 months after the food challenge. Prior sampling, participants should not have used antibiotics within the last month, or have recent/ongoing gastrointestinal symptoms (= diarrhea; Bristol scale 5-7) at the time of stool collection. Participants will receive a collection kit at home, containing special sampling tubes, gloves and instructions. In addition, patients are asked to record their food intake for the last 24 hours before sampling.
Collected clinical samples will be pseudonymized at the clinical centers. A synonym list, as part of the investigator file, containing the information on the participants' identity and the corresponding pseudonym, will be available at the clinical center only (medical investigators) and at CIEC. Personal data is protected under the regulation (EU) 2016/679 of 27 April 2016 on the protection of individuals with regard to the processing of personal data (GDPR) and the law of 1 August 2018 on the organization of the National Data Protection Commission and the General Data Protection Act.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Target follow-up
- 1 Day
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Peanut-allergic patients' group | – | –The aim is to include 30 patients with peanut allergy. Those patients will undergo diagnostic food challenges (incremental doses) while blood will be samples before, during and after the testing. The patients will receive standard of care during and after the challenge. Allergic symptoms will be treated according to established guidelines. |
| Control group | – | –The aim is to include 20 control participants, 10 peanut-tolerant and 10 fish-tolerant individuals. Those participants will undergo diagnostic food challenges (incremental or single doses) while blood will be samples before, during and after the testing. Same safety measures will be applied for food challenges of control individuals, as for the allergic patients. |
Who may qualify
- Ages
- 2 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Peanut-allergic individuals (N=30) and tolerant controls (N=20). Among the allergic patients, up to 10 allergic individuals of age 2-5 will be included.
Key inclusion criteria (9 listed)
- 2-70 years
- male or female
- Allergic to peanut (assessed by anamnesis, skinreactivity testing, sera testing for specific IgE)
- Sign an Informed Consent
- Diagnostic food challenge scheduled
Key exclusion criteria (15 listed)
- Significant co-morbidity
- Medical treatment by nonsteroidal anti-inflammatory drugs oraspirin, chronic treatment with beta-blockers,angiotensin-converting enzyme inhibitors, use ofantihistamines within 5 days of oral food challenge and oral corticosteroids within 14 days prior to the challenge
- Medical unfit for challenge (e.g : fever,unwell with intercurrent illness)
- Pregant women
- Unbalanced asthma
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Change in peripheral allergen peptides (serum samples) across food allergen uptake
Time frame: Samples analyzed through study completion, an average of 3 months
Abundance of allergen peptides as detected through mass spectrometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls
Change in in-vitro basophil reactivity profiles (cells sampled before food challenge) using defined food allergen peptides across different peptides mixes and peptide concentrations
Time frame: Samples analyzed through study completion, an average of 3 months
Reactivity of effector cells by dose-dependent activation (%-CD63+ CCR3+basophils) and flow cytometry measurement. Main comparison will be within the group of food-allergic patients, aligning patients with high/low reactivity and high/low sensitivity of basophils.
Change of immune cell phenotypes across food allergen uptake
Time frame: Samples analyzed through study completion, an average of 3 months
Abundance and function of immune cells as detected through single-cell mass cytometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Change in Cytokine release
Time frame: Samples analyzed through study completion, an average of 3 months
Cytokine quantification through multiplex immunoassays. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Baseline characteristics of the functional gut microbiome in food-allergic patients
Time frame: Samples analyzed through study completion, an average of 2 months
DNA, RNA, protein and metabolite profiling using a multi-omics approach through 16S RNA sequencing, unbiased high resolution method of metagenomics shotgun sequencing and transcriptomic analysis (Illumina MiSeq \& NextSeq) as well as metabolomic analysis (gas chromatography-mass spectrometry/liquid chromatography-mass spectrometry). In addition, microbial component analysis by antibody-specific immunoassays and flow cytometry. Main comparison will be on two study arms, food-allergic patients versus healthy controls.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 8 Mar 2024.
- Background: PubMed 28122115Muraro A, Lemanske RF Jr, Castells M, Torres MJ, Khan D, Simon HU, Bindslev-Jensen C, Burks W, Poulsen LK, Sampson HA, Worm M, Nadeau KC. Precision medicine in allergic disease-food allergy, drug allergy, and anaphylaxis-PRACTALL document of the European Academy of Allergy and Clinical Immunology and the American Academy of Allergy, Asthma and Immunology. Allergy. 2017 Jul;72(7):1006-1021. doi: 10.1111/all.13132. Epub 2017 Apr 12.
- Background: PubMed 27288833Matricardi PM, Kleine-Tebbe J, Hoffmann HJ, Valenta R, Hilger C, Hofmaier S, Aalberse RC, Agache I, Asero R, Ballmer-Weber B, Barber D, Beyer K, Biedermann T, Bilo MB, Blank S, Bohle B, Bosshard PP, Breiteneder H, Brough HA, Caraballo L, Caubet JC, Crameri R, Davies JM, Douladiris N, Ebisawa M, EIgenmann PA, Fernandez-Rivas M, Ferreira F, Gadermaier G, Glatz M, Hamilton RG, Hawranek T, Hellings P, Hoffmann-Sommergruber K, Jakob T, Jappe U, Jutel M, Kamath SD, Knol EF, Korosec P, Kuehn A, Lack G, Lopata AL, Makela M, Morisset M, Niederberger V, Nowak-Wegrzyn AH, Papadopoulos NG, Pastorello EA, Pauli G, Platts-Mills T, Posa D, Poulsen LK, Raulf M, Sastre J, Scala E, Schmid JM, Schmid-Grendelmeier P, van Hage M, van Ree R, Vieths S, Weber R, Wickman M, Muraro A, Ollert M. EAACI Molecular Allergology User's Guide. Pediatr Allergy Immunol. 2016 May;27 Suppl 23:1-250. doi: 10.1111/pai.12563.
- Background: PubMed 31812181Bunyavanich S, Berin MC. Food allergy and the microbiome: Current understandings and future directions. J Allergy Clin Immunol. 2019 Dec;144(6):1468-1477. doi: 10.1016/j.jaci.2019.10.019.
- Background: PubMed 32876924Costa J, Bavaro SL, Benede S, Diaz-Perales A, Bueno-Diaz C, Gelencser E, Klueber J, Larre C, Lozano-Ojalvo D, Lupi R, Mafra I, Mazzucchelli G, Molina E, Monaci L, Martin-Pedraza L, Piras C, Rodrigues PM, Roncada P, Schrama D, Cirkovic-Velickovic T, Verhoeckx K, Villa C, Kuehn A, Hoffmann-Sommergruber K, Holzhauser T. Are Physicochemical Properties Shaping the Allergenic Potency of Plant Allergens? Clin Rev Allergy Immunol. 2022 Feb;62(1):37-63. doi: 10.1007/s12016-020-08810-9.
- BackgroundJappe U and Kuehn A. Neues zu diagnostisch relevanten Einzelallergenen aus pflanzlichen und tierischen Nahrungsmittelallergenquellen. Allergologie 2016; 39: 425-438. doi: 10.5414/ALX01885.
- Individual participant dataSharing planned: No
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Evaluating Sucrose and Cold Oral Interventions for the Treatment of Oral Pruritus During Allergy Procedures.
Allergy, Food Allergies
Recruiting
Evaluation of the Tolerance of a New Formula Based on Hydrolyzed Rice Proteins in Children With Cow's Milk Allergy
IgE-Mediated Cow Milk Allergy
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Annette Kuehn, PhD principal investigator
Luxembourg Institute of Health
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Allergy;Food, run by Luxembourg Institute of Health at 2 sites in Luxembourg.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 9 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 8 Mar 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in Luxembourg. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in peripheral allergen peptides (serum samples) across food allergen uptake (time frame: Samples analyzed through study completion, an average of 3 months). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04604912, which also lists 5 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 Mar 2024.