Detection of Aluminium-reactive T-lymphocytes in Patients With Vaccination Granulomas

November 8, 2023 updated by: National Allergy Research Center, Denmark

Vaccines and subcutanoeus immunotherapy vaccines often contains aluminium, and may induce itching granulomas at the injection site. This is usually diagnosed by patch testing. Another way of detecting metal allergy is by investigation metal-specific cells in the blood.

We include participants both with and without granulomas, all have a blood test taken where we investigate if any participants have aluminium-specific cirkulation cells, and whether we can detect a difference between participants with and without granulomas.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Aluminium-adsorbed vaccines and subcutaneous immunotherapy may induce vaccination granulomas at injection site. Most children have concormitant aluminium contact allergy diagnosed by path testing, but in adults the allergy can rarely be detected by patch tests.

An alternative to patch testing is the blood in vitro lymphocyte proliferation test (LPT), which we investigated using a well-established LPT protocol. This has previously been shown to detect and characterize metal-specific cells and was used to detect circulating aluminium-specific proliferation. The LPT test is based on a single blood sample and has mostly been used to detect drug hypersensitivity. Still, its role in detecting metal allergy is expanding, with recent studies suggesting using the test as a supplement to the patch test when only a few allergens are to be investigated.

Study Type

Interventional

Enrollment (Actual)

16

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Hellerup, Denmark, 2900
        • National Allergy Research Centre, Gentofte Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Indivicuals with vaccination granulomas
  • controls without granulomas and no suspected contact allergies

Exclusion Criteria:

  • pregnancy, breastfeeding, recent vaccination, skin diseases

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: LPT aluminium
Investigation of participants with aluminium allergy versus healthy controls. Aluminium in different concentrations are added to the blood samples to elicit a response
Diagnostic test: Aluminum
Different concentrations of aluminium added to the blood test in vitro
Placebo Comparator: LPT control
Tetanus toxoid was added to blood samples as control substance.
Diagnostic test: Tetanus toxoid
Used as control substance

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
LPT
Time Frame: 7 days
Proliferation of T-cells
7 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Allergy Research Center, Denmark

Investigators

  • Study Director: Lars Blom, PhD, Allergy clinic, Gentofte Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 13, 2022

Primary Completion (Actual)

October 24, 2022

Study Completion (Actual)

February 20, 2023

Study Registration Dates

First Submitted

November 8, 2023

First Submitted That Met QC Criteria

November 8, 2023

First Posted (Actual)

November 14, 2023

Study Record Updates

Last Update Posted (Actual)

November 14, 2023

Last Update Submitted That Met QC Criteria

November 8, 2023

Last Verified

November 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • H-20073116

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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