Contact Allergy to Methacrylate Containing Nail Products: Lack of Impact of EU Legislation. An Audit on Behalf of the European Environmental Contact Dermatitis Research Group (EECDRG).

Background: There is a current fashion for the use of methacrylate-containing nail cosmetics that can induce allergic contact dermatitis. European Union (EU) legislation was introduced in 2021 that had the aim of preventing its development.

Objectives: To assess prevalence and exposures causing contact allergy to 2-hydroxyethyl methacrylate (HEMA) prior to and following implementation of the legislation.

Long-Term Observations on the European Photopatch Test Baseline Series (EPTBS) in Real Clinical Practice: 11 Years of Results in a Spanish Cohort and Suggestions for an EPTBS Update.

Background: The European Photopatch Testing Baseline Series (EPTBS) was published in 2013. However, limited data exist regarding the real-world clinical application of the EPTBS.

Objectives: This study aims to describe the photopatch test experience with the EPTBS over 11 years at a tertiary hospital in Spain.

Are Patch Testing Reactions Underrecognized in Skin of Color? Evaluating the Frequency of Borderline Reactions by Fitzpatrick Skin Type.

Patch testing reactions can be difficult to interpret in patients with skin of color (higher Fitzpatrick skin types [FSTs]) due to limited erythema or vesiculation. Missed reactions may lead to prolonged allergic contact dermatitis duration and prevent disease clearance in this population. To compare the frequency of borderline patch test reactions in patients with different FSTs (I, II, III, IV, V, VI).

Panthenol Allergic Contact Dermatitis: Sources of Exposure, Reported Cases, and a Call for More Frequent Testing.

Panthenol, a vitamin B5 derivative, is a key precursor in the synthesis of fatty acids that maintain epithelial function. Its ability to aid in moisturization, skin barrier restoration, and wound healing has led to its frequent incorporation into personal care products and pharmaceuticals-many of which are marketed to be hypoallergenic. While contact allergy to panthenol is rather uncommon, rates of positive reactions are on the rise, increasing from 0.

Allergens in ophthalmic medicaments in New Zealand.

Background/objectives: Eyelid allergic contact dermatitis (ACD) attributed to ophthalmic medications is often underreported, which can result in poor outcomes. Patch testing for eyelid ACD requires up-to-date knowledge of potential allergens. The aim of this study was to investigate allergens in ophthalmic medicaments in New Zealand.

K. Koch in the Treatment of Skin Inflammation: A Comprehensive Evaluation of Its Therapeutic Properties.

is a plant widely cultivated for food and medicinal purposes. species have been reported as anti-inflammatory, antibacterial, anxiolytic, and antinephritic agents. This study aimed to evaluate the anti-inflammatory potential of the ethanolic extract (EE) from the aerial parts of and its most promising fraction in models of acute and chronic inflammation, including a psoriasis-like mouse model.

Epidermal spongiotic Langerhans cell collections, but not eosinophils, are a clue to the diagnosis of allergic contact dermatitis: A series of 170 clinically- and patch test-confirmed cases.

Background: Allergic contact dermatitis cannot be reliably differentiated from other forms of spongiotic/eczematous dermatitis by histology alone. Textbooks and recent studies have variably supported the specificity of dermal eosinophils, eosinophilic spongiosis, and Langerhans cell collections, among other features.

Objective: To assess which histopathologic features favor a diagnosis of allergic contact dermatitis.

Three Cases of Allergic Contact Dermatitis to 2-(Thiocyanomethylthio)benzothiazole in Leather Items.

Background: 2-(Thiocyanomethylthio)benzothiazole (TCMTB) is a fungicide product widely used in the leather industry, particularly since the 1990s. However, reports of allergic contact dermatitis triggered by this chemical are scarce.

Objectives: To investigate three cases of dermatitis following contact with leather products, possibly related to TCMTB.

Evaluating the Impact of Laundry Detergents on the Skin Microbiome of Atopic Dermatitis Patients-A Clinical Study.

Background And Aims: Remnants of laundry detergent ingredients are suspected to be in constant contact with the skin. Allergy sufferers need assurance that the chemicals in everyday products do not cause such disruption. The purpose of this study was to evaluate the effects and tolerability of common laundry detergents on the skin microbiome in individuals with atopic dermatitis.

Preoperative versus postoperative radiotherapy for localized soft tissue sarcoma treated with curative intent in a French tertiary center "SARCLOC".

Background: Soft tissue sarcomas of the extremities (E-STS) are rare and heterogeneous. Treatment combines surgery with preoperative or postoperative radiotherapy (RT) for deep, large, or high-grade tumors. We evaluate the effectiveness and toxicity in E-STS patients treated at our institution from 2015 to 2021.

Preclinical safety assessment in rats after dermal exposure to acetylcarvacrol, a potential acaricide against the brown dog tick.

Carvacrol, a phenolic monoterpene found in essential oils of plants of the Lamiaceae family, emerges as an alternative acaricide of plant origin. Its acetylation was proposed to obtain a derivative compound with a better pharmacological profile and lower toxicity to non-target organisms. The present study aimed to assess the preclinical safety of acetylcarvacrol after dermal application in Wistar rats, through the examination of hematological and biochemical parameters, as well as histopathological analysis of the skin, liver and kidney.

Negative patch test findings after initiation of upadacitinib: A case report.

Upadacitinib is a systemic Janus kinase inhibitor currently approved for the treatment of atopic dermatitis. Many patients with atopic dermatitis have a concomitant diagnosis of allergic contact dermatitis. The utility of Janus kinase inhibitors for the treatment of allergic contact dermatitis and the effect on patch testing results remains unclear.

Development of machine learning models for the prediction of the skin sensitization potential of cosmetic compounds.

Background: To enhance the accuracy of allergen detection in cosmetic compounds, we developed a co-culture system that combines HaCaT keratinocytes (transfected with a luciferase plasmid driven by the AKR1C2 promoter) and THP-1 cells for machine learning applications.

Methods: Following chemical exposure, cell cytotoxicity was assessed using CCK-8 to determine appropriate stimulation concentrations. RNA-Seq was subsequently employed to analyze THP-1 cells, followed by differential expression gene (DEG) analysis and weighted gene co-expression net-work analysis (WGCNA).

Cinnamic Acid Derivatives as Potential Multifunctional Agents in Cosmetic Formulations Used for Supporting the Treatment of Selected Dermatoses.

Cinnamic acid and its natural derivatives were primarily used in cosmetics as fragrance materials as well as skin and hair conditioners. Nowadays, not only natural but also synthetic cinnamic acid derivatives are used as active ingredients of cosmetic formulations. They still serve as fragrance ingredients but also as active ingredients supporting the treatment of selected dermatoses such as acne vulgaris, atopic dermatitis, and hyperpigmentation.

A Comprehensive Review on Allergic Disorders, Their Epidemiological Trend and Barriers in Management.

Allergy is an important public health disorder. Common allergic disorders include asthma, rhinitis, conjunctivitis, atopic eczema, contact dermatitis, and food and drug allergies. In this article, allergic disorders are discussed comprehensively, along with their epidemiological trends, quality of care, and barriers in management.

Surgical Site Allergic Contact Dermatitis to 2-Octyl-Cyanoacrylate: A Systematic Review and FDA MAUDE Review.

Background: Skin adhesives containing 2-ocyl cyanoacrylate are a common source of allergic contact dermatitis (ACD) that complicate postoperative wound healing. There are limited studies that describe postoperative cutaneous reactions to skin adhesives and clinical management.

Objectives: To review the incidence, description, and clinical management of surgical site ACD to 2-ocyl cyanoacrylate.

T Cells Induce Prolonged Downregulation of Barrier Molecules in a Mouse Model of Allergic Contact Dermatitis.

Background: Dysfunction of the skin barrier is regarded as a key event in the initiation and progression of inflammatory skin diseases. In many cases of allergic contact dermatitis (ACD), epidermal-resident memory CD8 T (T) cells play a central role in the immune response to contact allergens. However, if and how allergen-specific CD8 T cells affect the expression of skin barrier molecules is not known.

Cloth versus disposable diapers: an exploratory study on family habits.

Objective: To describe features and habits of diaper area care and compare the frequency of diaper dermatitis in infants using cloth diapers with those using disposable diapers.

Methods: Questionnaires were administered to families with infants who had not started potty training, to assess the frequency of diaper rash in two groups: babies who use exclusively cloth diapers (CD), and others with exclusively disposable diapers (DD). The hygiene methods of the perineal region and the skin lesions frequency were evaluated.