Active clinical trials for "Dermatitis, Allergic Contact"

Aluminium is used in many different cosmetic products, including make-up, deodorants and sunscreen. The purpose of this study is to investigate whether these everyday skin products with small amounts of aluminium can cause skin reactions in children diagnosed with contact allergy to aluminium. The study is conducted as a Repeated Open Application Test study (ROAT), a method originally developed to clarify the clinical relevance of questionable and positive patch samples, by imitating everyday use of a skin product.

This study hopes to improve the investigators understanding of how the immune system acts in allergic contact dermatitis. In order to reach this goal, normal volunteers, who are suspected of having allergic contact dermatitis, will be patch tested for the fifteen most common allergens. Then, biopsies will be taken of the skin at the sites where the there is a positive reaction to the allergen. Also, small biopsies will be taken from an area that received a patch but no allergen and an area that did not receive a patch to serve as controls. In a second stage of the study, volunteers will receive patches with the allergen to which they demonstrated an allergic response. More biopsies will be taken, over three designated time points. The biopsied skin samples will then be studied in a laboratory.

Background. Allergic Contact Dermatitis (ACD) is an inflammatory skin disease mediated by direct contact with allergens as nickel, the most common allergen, that may be related with epigenetic changes. Objective. Evaluate the miR-126 expression and its target VCAM-1, in the skin of patients with ACD to nickel. Methods. Fifteen patients with positive patch test to nickel were included, and the expression of miR-126 and VCAM-1 was evaluated by RT-qPCR.

The objective of this study is to investigate the potential of NeoMatriXTM Wound Matrix to cause an allergic response to healthy volunteers using a skin prick test.

RATIONALE: Gathering information about allergies to metals may help doctors learn whether having an allergy to metal used in dental work increases the risk of developing oral cancer. PURPOSE: This clinical trial is studying contact allergies to dental metal as a possible risk factor for oral cancer.

This study will evaluate the incidence of allergic manifestations (the first of which is atopic dermatitis) and infectious diseases in children fed with an infant formula under real conditions of use.

In-stent restenosis remains one of the most challenging problems in patients after coronary artery angioplasty. Angiographically, it is discovered in 10% of the patients after drug-eluting stent (DES) implantation. There are multiple factors causing restenosis, which can be divided into two major groups: first vessel-dependent (based on the vessel's tortuosity, dimensions and lesion's calcification, all leading to suboptimal stent expansion), and second dependent on the inflammatory processes caused by the intervention. Study objectives is the analysis of the possible correlation between allergy to metals utilised during the stent manufacturing (nickel, cobalt, chromium, molybdenum, tungsten) and in-stent restenosis occurence. The angiographic results of stent implantation, and in-stent restenosis will be assessed independently by two skilled interventional cardiologists, and in case of their discrepant opinions, the decision will be made on the basis of the third cardiologist. The tests will be applicated during the hospitalisation, then read after 48 hours and 72 hours, and subsequently interpreted by the skilled dermatologist, during the hospital stay or afterwards.

The study is required by the FDA as part of a post-marketing commitment. The purpose of the study is to compare the reactivity of the TRUE Test quaternium-15 patch and a real use exposure.The subjects will wear the patch test for 48 hours and reading will be performed day 3 or 4. The use test will be applied from day 3 or 4 and untill reaction appears. Reactions from respectively TRUE Test and use test will be compared using the McNemar Change Test.

The current knowledge of the pathophysiology of allergic contact dermatitis is based on the murine model. In this model, CD8+ T cells are effector cells, and CD4+ T cells regulate the response by limiting the expansion of CD8+ T cells. The goal of this study is to characterize the pathophysiology of contact dermatitis, with patients allergic to para-phenylenediamine (PPD). We suppose that the CD8+ T cells are the effectors of the allergic contact dermatitis, although the regulator cells belong to the LT CD4+ population. We will test our hypothesis on blood samples, and cutaneous biopsies of patients allergic to PPD.

Rationale: Foot ulcers among diabetics are common. The presence of a contact allergy limits the healing process. Contact allergies for wound dressings are common among patients with ulcers caused by venous insufficiency but less is known about contact allergies in diabetic patients with ulcers. Objective: To determine the prevalence of contact allergies for wound dressings in patients with diabetic foot ulcers. Study design: A prospective multicenter study. Study population: Patients (n=139) with diabetic foot ulcers caused by type 1 or 2 diabetes mellitus treated at Rijnstate Hospital Arnhem, the Netherlands. Main study parameters/endpoints: The primary study parameter is the presence of contact allergies for wound dressings. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: An allergy test is standard procedure at Rijnstate Hospital, there is no direct technique-related burden or risk for the patient. In addition, wound dressings can be adjusted in patients where a contact allergy is determined which will benefit the prognosis of these patients. The data of this study will give insight in the prevalence of contact allergies for wound dressings in patients with diabetic foot ulcers.