View clinical trials related to Dermatitis, Contact.
Filter by:Testing the effectiveness and safety of cosmetics with niacinamide in irritant contact dermatitis: A Randomised, Controlled Trial will be conducted at USSM. Healthy volunteers will be included (at least 25) and test sites are forearms. Sodium lauryl sulphate will be used to induce contact dermatitis and participants will be measured for 7 days
The gold standard for the diagnosis of allergic contact dermatitis is patch testing, during which allergens are affixed to the skin underneath tape and left for multiple days. A large area of clear skin is thus required for successful testing. While the back is traditionally thought to be the ideal area for testing, the thighs may be more available or advantageous. This study seeks to randomize patients undergoing patch testing to have patches placed on the back or the thighs. The investigators seek to understand the benefits of testing on the legs versus the back in terms of patient experience as well as achieving a successful test. This study will measure patient experience using a survey administered to patients. Quality of testing will be assessed by study coordinators prior the removal of patches.
An eczematous reaction is an inflammatory intolerance response of the skin. In acute phase the reaction is characterized by erythema and blistering while in the chronic phase it presents as dryness, itchiness and lichenification. Irritative contact dermatitis describes these patterns of reaction in response to toxicity of chemicals on the skin cells, which trigger inflammation by activation of the innate immune system.
Allergic contact dermatitis (ACD) is a common inflammatory skin disease, affecting approximately 15-20% of the general population in industrialized countries and ranking first among occupational diseases in many European countries. ACD typically presents as a severe skin inflammation with redness, edema, oozing and crusting. It is characterized by a delayed type IV hypersensitivity response mediated by allergen-specific T cells in sensitized individuals. Current diagnosis relies on clinical investigations by diagnostic patch testing with suspected allergenic chemicals. The patch test method aims at reproducing the eczematous lesions by applying occlusive patches containing the suspected allergens to the patient's healthy skin. This is a time consuming and costly process. It requires experienced medical staff to read the reaction, and is only performed by a limited number of expert dermato-allergologists across Europe (which limits the accessibility of suspected ACD patients to diagnosis). Finally, if the robustness of the patch-test method is undisputable, it cannot be neglected that patch-test results are sometimes false positive or non-relevant, which leads to non-appropriate disease management. Therefore, there is today an urgent need for the availability of new ex vivo/in vitro tools based on the modern understanding of the immune mechanisms of ACD to enhance the current diagnostic procedure, and open new avenues for a personalized diagnosis of skin ACD. In this context, the team "Epidermal Immunity and Allergy" (CIRI, Inserm U1111) recently characterized the molecular signatures of ACD (using microarrays), based on positive patch-test reactions to reference chemical allergens or non-allergenic irritants. It was shown that there are unique molecular profiles and signaling pathways characterizing each inflammation. Machine learning methods were then developed to identify and validate classification algorithms based on the expression levels of a minimum set of biomarkers (n=12), enabling very good discrimination between allergen-induced and irritant-induced patch-test inflammation (which was confirmed by complementary quantitative RT-PCR analyses). Finally, some patients with weak positive patch-test reactions to allergens show no/low marks of allergy molecular signature, questioning about the reliability/relevance of their patch-tests results. Our results therefore stress the value of molecular profiling of patch-test reactions to improve/reinforce clinical ACD diagnosis, and to help the dermatologist to discriminate true versus false positive patch test reactions. Importantly, those results also open new avenues for the development of a future point care diagnosis. Indeed, it is currently is estimated that only 20% of patients being sent for allergology work-ups suffer from true skin allergy (i.e. patients with positive patch-tests, combined with relevant clinical history and confirmatory use tests). Most of the patients (80%) are in fact suffering from skin irritation. Therefore, the detection of ACD biomarkers in active eczema lesions could provide the dermatologist with major information to improve and accelerate its clinical diagnosis. This could also prevent numerous patients (negative for ACD biomarkers) being sent for unnecessary allergology work-ups. However, to date, it remains to be demonstrated that (i) the same panel of ACD biomarkers is expressed both in acute eczema lesions and positive patch-test reactions, and that (ii) the detection of these biomarkers allows for a sensitive and reliable diagnosis of skin allergy. The main objective of the study will be to make the proof of concept that the expression of allergy biomarkers correlates with patients suffering from true ACD (i.e. patients with high biomarker expression in acute lesions, positive patch-tests and relevant clinical history), versus those developing skin irritation (no/low biomarker expression in acute lesions, negative patch-tests, and lack of clinical history).
Allergic contact dermatitis (ACD) is a common inflammatory skin disease, which represents a major public health issue in industrialized countries. ACD is induced by repeated contact of individuals with environmental chemicals and is characterized by a delayed type IV hypersensitivity response with skin inflammation mediated by allergen-specific T cells in sensitized individuals. The current diagnosis is based on clinical examination, assessment of environmental exposures and patch testing. Although the robustness of patch tests has long been established, this method can sometimes give inconclusive results, leading to problems in disease management. Preliminary results indicate that the molecular analysis of Patch-Tests (PT) reactions could allow a more reliable diagnosis. Importantly, this gene profiling approach may help to identify patients with false positive PT reactions, i.e. patients whose PT reactions did not show any "allergy signature". However, it remains to be demonstrated that the presence or absence of allergy biomarkers in PT lesions are indeed predictive of ACD response in patients. The main objective is to describe the correlation between these molecular signatures and the reactivity of individuals when they are exposed to allergenic compounds under conditions of use (using ROAT test).
The goal of this study is to look into the patterns of sensitization to figure out how allergic contact dermatitis (ACD), individual susceptibility, and patient characteristics are connected. The joint application of classic statistics and machine learning methods will reveal the relationship between contact dermatitis expressions and several clinical characteristics.
The purpose of this study is to answer: how do inflammation and anti-inflammatory skin therapies work in the skin? Inflammation is a protective response from the body's immune system to injury, disease, or irritation. It is a process by which your body's white blood cells and the things they make protect you from infection from outside invaders such as bacteria and viruses.
This is a multi-center randomized controlled trial to evaluate two different methods of reinforcing surgical port site closure: 2-Octylcyanoacrylate and n-butyl-2-cyanoacrylate.
Phototherapy, including ultraviolet B (UVB) and ultraviolet A (UVA) light, has been used to treat a number of dermatologic conditions. Psoriasis is one of the most common conditions treated with phototherapy, in which phototherapy is often indicated for extensive disease with contraindications for other systemic treatments. The mechanism of action of phototherapy for the treatment of psoriasis is not completely understood; however, it is known that UVB light induces apoptosis of pathogenic T cells and keratinocytes, which may reduce the overactive immune response and epidermal hyperproliferation. Phototherapy has shown some efficacy for other diseases, such as alopecia areata (AA) and polymorphous light eruption (PMLE). However, phototherapy is not always an accessible treatment option for patients due to cost or lack of time.
The global coronavirus disease pandemic (COVID-19) has led to an increased need to wear protective equipment such as wearing face masks and practicing hygiene measures such as more frequent use of antiseptics. These measures can lead to changes in the skin, the development of new inflammatory skin diseases or exacerbation of existing ones, with health professionals especially under the risk of developing these changes. Changes in the skin of the hands due to the use of antiseptics have been observed in a number of studies, however, part of the study was based solely on subjects' self-assessment or clinical assessment of researchers, and only a small part on objective measurements of skin parameters. Also, the impact of prolonged use of antiseptics and the impact of measures to prevent and protect against irritation such as topical application of emollient preparations have not been investigated. The impact of repeated use of antiseptics in the repeated exposure model on the forearms will be investigated. This model is a modification of the existing model of irritative dermatitis induced by sodium lauryl sulfate where the original irritant was replaced by an antiseptic solution.