5,756 results match your criteria Protein Contact Dermatitis

Imidazolidinyl urea activates mast cells via MRGPRX2 to induce non-histaminergic allergy.

Toxicol Res (Camb) 2021 May 29;10(3):467-475. Epub 2021 Apr 29.

Department of Pharmaceutical analysis, School of Pharmacy, Xi'an Jiaotong University, 76, Yanta west road, Xi'an, China.

Imidazolidinyl urea (IU) is used as an antimicrobial preservative in cosmetic and pharmaceutical products. IU induces allergic contact dermatitis, however, the mechanism has not yet been elucidated. Mas-related G protein-coupled receptor-X2 (MRGPRX2) triggers drug-induced pseudo-allergic reactions. Read More

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Daily Lifestyle and Inflammatory Skin Diseases.

Int J Mol Sci 2021 May 14;22(10). Epub 2021 May 14.

Department of Dermatology, University of Occupational and Environmental Health, 1-1, Iseigaoka, Yahatanishi-Ku, Kitakyushu 807-8555, Japan.

Throughout life, it is necessary to adapt to the Earth's environment in order to survive. A typical example of this is that the daily Earth cycle is different from the circadian rhythm in human beings; however, the ability to adapt to the Earth cycle has contributed to the development of human evolution. In addition, humans can consume and digest Earth-derived foods and use luxury materials for nutrition and enrichment of their lives, as an adaptation to the Earth's environment. Read More

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Contact dermatitis.

Nat Rev Dis Primers 2021 May 27;7(1):38. Epub 2021 May 27.

Department of Dermatology, Brigham and Women's Hospital, Boston, MA, USA.

Contact dermatitis (CD) is among the most common inflammatory dermatological conditions and includes allergic CD, photoallergic CD, irritant CD, photoirritant CD (also called phototoxic CD) and protein CD. Occupational CD can be of any type and is the most prevalent occupational skin disease. Each CD type is characterized by different immunological mechanisms and/or requisite exposures. Read More

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Anaphylaxis due to potato starch (possibly caused by percutaneous sensitization).

Asia Pac Allergy 2021 Apr 20;11(2):e14. Epub 2021 Apr 20.

Department of Pediatrics, Fujita Health University School of Medicine, Nagoya, Japan.

An 8-year-old boy with poor control of atopic dermatitis could eat potato products such as French fries without restrictions until 21 months of age. However, he developed generalized urticaria after eating potato products at the same age. Therefore, potatoes were excluded from his diet; nevertheless, he continued to consume a very small amount of potato starch but was without symptoms until the age of 8 years. Read More

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Paeoniflorin attenuates the allergic contact dermatitis response via inhibiting the IFN-γ production and the NF-κB/IκBα signaling pathway in T lymphocytes.

Int Immunopharmacol 2021 Jul 6;96:107687. Epub 2021 May 6.

Department of Dermatology, The Second Hospital of Dalian Medical University, Dalian, China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China. Electronic address:

Paeoniflorin (PF) has been demonstrated to have an anti-allergic and anti-inflammatory effect in the treatment of allergic contact dermatitis (ACD). However, its clinical application is hampered by the lacking of comprehensive mechanical explanation. This research aimed to study the effect of PF on the proliferation, apoptosis and cytokines secretion as well as the expression of nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinase (MAPK) signaling pathways of T lymphocytes activation in vitro and in vivo. Read More

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Multifaceted MRGPRX2: New insight into the role of mast cells in health and disease.

J Allergy Clin Immunol 2021 May 4. Epub 2021 May 4.

Department of Basic and Translational Sciences, University of Pennsylvania, School of Dental Medicine, Philadelphia, Pa. Electronic address:

Cutaneous mast cells (MCs) express Mas-related G protein-coupled receptor-X2 (MRGPRX2; mouse ortholog MrgprB2), which is activated by an ever-increasing number of cationic ligands. Antimicrobial host defense peptides (HDPs) generated by keratinocytes contribute to host defense likely by 2 mechanisms, one involving direct killing of microbes and the other via MC activation through MRGPRX2. However, its inappropriate activation may cause pseudoallergy and likely contribute to the pathogenesis of rosacea, atopic dermatitis, allergic contact dermatitis, urticaria, and mastocytosis. Read More

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Topical Applications of a Novel Emollient Inhibit Inflammation in Murine Models of Acute Contact Dermatitis.

Biomed Res Int 2021 13;2021:5594646. Epub 2021 Apr 13.

Dermatology Hospital of Southern Medical University, Guangdong 510091, China.

The benefits of emollients for eczematous dermatitis and psoriasis have been thought to be due to the improvements in epidermal function, including epidermal permeability barrier, stratum corneum hydration, and stratum corneum pH. We determined here whether emollient can direct inhibit cutaneous inflammation. Ear inflammation was induced by topical application of either 12-O-tetradecanoylphorbol-13-acetate (TPA) or 1-fluoro-2,4-dinitrofluorobenzene (DNFB). Read More

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[New allergens for occupational dermatology?]

Vera Mahler

Hautarzt 2021 Jun 5;72(6):474-483. Epub 2021 May 5.

Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225, Langen, Deutschland.

Background: The environment is continuously subject to change. Exposures in the work environment and therefore the importance of occupational type I and type IV allergens may change.

Objectives: The most important trends concerning occupational allergens, new occupational allergens/allergen exposures, the diagnostic procedure to detect new allergens in practice and regulatory developments are presented. Read More

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Immune-Regulatory and Molecular Effects of Antidepressants on the Inflamed Human Keratinocyte HaCaT Cell Line.

Neurotox Res 2021 May 4. Epub 2021 May 4.

Department of Experimental Neuroendocrinology, Maj Institute of Pharmacology Polish Academy of Sciences, Kraków, Poland.

Allergic contact dermatitis (ACD) is a T cell-mediated type of skin inflammation resulting from contact hypersensitivity (CHS) to antigens. There is strong comorbidity between ACD and major depression. Keratinocytes release immunomodulatory mediators including pro-inflammatory cytokines and chemokines, which modulate skin inflammation and are crucial cell type for the development of CHS. Read More

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The Multifaceted Mas-Related G Protein-Coupled Receptor Member X2 in Allergic Diseases and Beyond.

Int J Mol Sci 2021 Apr 23;22(9). Epub 2021 Apr 23.

Department of Allergy and Clinical Immunology, Clínica Universidad de Navarra, 31008 Pamplona, Spain.

Recent research on mast cell biology has turned its focus on MRGPRX2, a new member of the Mas-related G protein-coupled subfamily of receptors (Mrgprs), originally described in nociceptive neurons of the dorsal root ganglia. MRGPRX2, a member of this group, is present not only in neurons but also in mast cells (MCs), specifically, and potentially in other cells of the immune system, such as basophils and eosinophils. As emerging new functions for this receptor are studied, a variety of both natural and pharmacologic ligands are being uncovered, linked to the ability to induce receptor-mediated MC activation and degranulation. Read More

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Art of prevention: Allergic sensitization through damaged skin: Atopic, occupational, and stasis dermatitis.

Int J Womens Dermatol 2020 Dec 19;6(5):381-383. Epub 2020 Aug 19.

University Hospitals Cleveland Medical Center/Case Western Reserve University School of Medicine, United States.

The prevention of allergic contact dermatitis hinges on maintaining the integrity of the skin barrier and responding appropriately when it is disturbed. Although intact skin is subject to sensitization via highly irritating allergens, such as poison ivy, acutely inflamed and chronically inflamed skin is subject to sensitization to allergens without inherent irritant potential. In the chronically inflamed state of atopic dermatitis, sensitization to proteins, such as food, also carries a risk for systemic contact dermatitis via ingestion of the allergen. Read More

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December 2020

Paeoniflorin suppresses allergic and inflammatory responses by promoting autophagy in rats with urticaria.

Exp Ther Med 2021 Jun 8;21(6):590. Epub 2021 Apr 8.

Dermatological Department, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610072, P.R. China.

Paeoniflorin (PF) has been reported to be effective against several skin disorders, such as allergic contact dermatitis and psoriasis; however, it remains unclear whether PF can protect against urticarial lesions. Herein, the effects of PF on rats with urticarial lesions and the possible underlying mechanism were investigated. The effects of PF administration on a rat model of ovalbumin-induced urticarial-like lesions were evaluated via pathological analysis using hematoxylin-eosin staining. Read More

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[Exceptional occupational allergies due to food of animal origin].

H Dickel

Hautarzt 2021 Jun 20;72(6):493-501. Epub 2021 Apr 20.

Klinik für Dermatologie, Venerologie und Allergologie, St. Josef-Hospital, Universitätsklinikum der Ruhr-Universität Bochum (UK RUB), Gudrunstr. 56, 44791, Bochum, Deutschland.

Background: The food industry is a high-risk area for work-related allergic immediate skin reactions (contact urticaria, contact urticaria syndrome, protein contact dermatitis) with or without respiratory symptoms (allergic rhinitis, allergic asthma) due to proteins of animal origin.

Objectives: The present work gives an overview of allergenic seafood and meat proteins and their clinical and occupational relevance in different work settings.

Methods: A review of current knowledge and a supplementary selective literature search were performed. Read More

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Effect of on DNCB-Induced Allergic Contact Dermatitis-Like Skin Lesion in Balb/c Mice.

Nutrients 2021 Mar 4;13(3). Epub 2021 Mar 4.

Department of Anatomy, College of Korean Medicine, Kyung Hee University, 26, Kyunghee dae-ro, Dongdaemun-gu, Seoul 02447, Korea.

(CP), or Korean red pinecone, is a cluster of fruit. CP has also been verified in several studies to have anti-oxidation, anti-fungal, anti-bacterial, and anti-melanogenic effects. However, anti-inflammatory effects have not yet been confirmed in the inflammatory responses of pinecones to allergic contact dermatitis. Read More

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The Role of TRPA1 in Skin Physiology and Pathology.

Int J Mol Sci 2021 Mar 17;22(6). Epub 2021 Mar 17.

Department of Health Sciences, Clinical Pharmacology Unit, University of Florence, 50139 Florence, Italy.

The transient receptor potential ankyrin 1 (TRPA1), a member of the TRP superfamily of channels, acts as 'polymodal cellular sensor' on primary sensory neurons where it mediates the peripheral and central processing of pain, itch, and thermal sensation. However, the TRPA1 expression extends far beyond the sensory nerves. In recent years, much attention has been paid to its expression and function in non-neuronal cell types including skin cells, such as keratinocytes, melanocytes, mast cells, dendritic cells, and endothelial cells. Read More

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The Contact Allergen NiSO Triggers a Distinct Molecular Response in Primary Human Dendritic Cells Compared to Bacterial LPS.

Front Immunol 2021 11;12:644700. Epub 2021 Mar 11.

Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany.

Dendritic cells (DC) play a central role in the pathogenesis of allergic contact dermatitis (ACD), the most prevalent form of immunotoxicity in humans. However, knowledge on allergy-induced DC maturation is still limited and proteomic studies, allowing to unravel molecular effects of allergens, remain scarce. Therefore, we conducted a global proteomic analysis of human monocyte-derived dendritic cells (MoDC) treated with NiSO, the most prominent cause of ACD and compared proteomic alterations induced by NiSO to the bacterial trigger lipopolysaccharide (LPS). Read More

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ω3 fatty acid metabolite, 12-hydroxyeicosapentaenoic acid, alleviates contact hypersensitivity by downregulation of CXCL1 and CXCL2 gene expression in keratinocytes via retinoid X receptor α.

FASEB J 2021 Apr;35(4):e21354

Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.

ω3 fatty acids show potent bioactivities via conversion into lipid mediators; therefore, metabolism of dietary lipids is a critical determinant in the properties of ω3 fatty acids in the control of allergic inflammatory diseases. However, metabolic progression of ω3 fatty acids in the skin and their roles in the regulation of skin inflammation remains to be clarified. In this study, we found that 12-hydroxyeicosapentaenoic acid (12-HEPE), which is a 12-lipoxygenase metabolite of eicosapentaenoic acid, was the prominent metabolite accumulated in the skin of mice fed ω3 fatty acid-rich linseed oil. Read More

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A Glucuronic Acid-Palmitoylethanolamide Conjugate (GLUPEA) Is an Innovative Drug Delivery System and a Potential Bioregulator.

Cells 2021 Feb 20;10(2). Epub 2021 Feb 20.

Istituto di Chimica Biomolecolare, CNR, 80078 Pozzuoli, Napoli, Italy.

Palmitoylethanolamide (PEA) is an endogenous anti-inflammatory lipid mediator and a widely used nutraceutical. In this study, we designed, realized, and tested a drug-carrier conjugate between PEA (the active drug) and glucuronic acid (the carrier). The conjugate, named GLUPEA, was characterized for its capability of increasing PEA levels and exerting anti-inflammatory activity both in vitro and in vivo. Read More

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February 2021

The T Cell Repertoires from Nickel Sensitized Joint Implant Failure Patients.

Int J Mol Sci 2021 Feb 28;22(5). Epub 2021 Feb 28.

Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.

Nickel (Ni) is one of the most common allergens, affecting around 10-15% of the general population. As the demand for orthopedic implant surgery rises, the number of surgical revisions due to joint implant failure also increases. There is evidence that some patients develop joint failure due to an immune response to a component of the implant, and we have found that Ni is an especially important cause. Read More

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February 2021

Sex Differences in Photoprotective Responses to 1,25-Dihydroxyvitamin D3 in Mice Are Modulated by the Estrogen Receptor-β.

Int J Mol Sci 2021 Feb 16;22(4). Epub 2021 Feb 16.

Department of Physiology, University of Sydney, Sydney, NSW 2006, Australia.

Susceptibility to photoimmune suppression and photocarcinogenesis is greater in male than in female humans and mice and is exacerbated in female estrogen receptor-beta knockout (ER-β-/-) mice. We previously reported that the active vitamin D hormone, 1,25-dihydroxyvitamin D3 (1,25(OH)2D), applied topically protects against the ultraviolet radiation (UV) induction of cutaneous cyclobutane pyrimidine dimers (CPDs) and the suppression of contact hypersensitivity (CHS) in female mice. Here, we compare these responses in female versus male Skh:hr1 mice, in ER-β-/-/-- versus wild-type C57BL/6 mice, and in female ER-blockaded Skh:hr1 mice. Read More

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February 2021

Inactivation of the PD-1-Dependent Immunoregulation in Mice Exacerbates Contact Hypersensitivity Resembling Immune-Related Adverse Events.

Front Immunol 2020 27;11:618711. Epub 2021 Jan 27.

Department of Immunology, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan.

Blockade of PD-1, an indispensable physiological immunoregulatory mechanism, enhances immune activities and is widely used in the immunotherapy of cancer. This treatment often accompanies inflammatory complication called immune-related adverse events (irAE), most frequently in the skin. To analyze how skin inflammation develops by the blockade of PD-1-dependent immunoregulation, we studied the exacerbation of oxazolone-induced contact hypersensitivity by PD-L1 blockade. Read More

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Coordinated action of microsomal prostaglandin E synthase-1 and prostacyclin synthase on contact hypersensitivity.

Biochem Biophys Res Commun 2021 03 11;546:124-129. Epub 2021 Feb 11.

Division of Health Chemistry, Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, Tokyo, Japan. Electronic address:

Microsomal prostaglandin (PG) E synthase-1 (mPGES-1) and prostacyclin (PGI) synthase (PGIS) are PG terminal synthases that work downstream of cyclooxygenase and synthesize PGE and PGI, respectively. Although the involvement of PG receptors in acquired cutaneous immune responses was recently shown, the roles of these PG terminal synthases remain unclear. To identify the pathophysiological roles of mPGES-1 and PGIS in cutaneous immune systems, we applied contact hypersensitivity (CHS) to mPGES-1 and PGIS knockout (KO) mice as a model of acquired immune responses. Read More

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Epidermal T cell subsets-Effect of age and antigen exposure in humans and mice.

Contact Dermatitis 2021 Jun 17;84(6):375-384. Epub 2021 Mar 17.

The LEO Foundation Skin Immunology Research Center, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.

Background: Epidermal T cells play a central role in immune surveillance and in inflammatory skin diseases. Major differences in the epidermal T cell composition are found between adult humans and antigen-inexperienced laboratory mice. Whether this is due to inborn species differences, to different environmental exposures, or a combination of the two is a matter of debate. Read More

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Preventive oral supplementation with 5 alleviates oxazolone-induced allergic contact dermatitis-like skin inflammation in mice.

Benef Microbes 2021 Apr 12;12(2):199-209. Epub 2021 Feb 12.

Department of Pharmaceutical Sciences, Institute of Environmental, Chemistry and Pharmaceutical Sciences, Federal University of São Paulo, R. São Nicolau, 210, Diadema, SP 09913-030, Brazil.

Allergic contact dermatitis (ACD) is a common allergic skin disease that affects individuals subjected to different antigen exposure conditions and significantly impacts the quality of life of those affected. Numerous studies have demonstrated that probiotics suppress inflammation through immunomodulatory effects. In this study, we aimed to evaluate the effect of the probiotic 5 as a preventive treatment for ACD using an oxazolone-induced murine model. Read More

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Neutrophil-Derived Myeloperoxidase Facilitates Both the Induction and Elicitation Phases of Contact Hypersensitivity.

Front Immunol 2020 25;11:608871. Epub 2021 Jan 25.

Versiti Blood Research Institute, Milwaukee, WI, United States.

Background: Allergic contact dermatitis (ACD) is a common skin disorder affecting an estimated 15-20% of the general population. The mouse model of ACD is contact hypersensitivity (CHS), which consists of two phases: induction and elicitation. Although neutrophils are required for both CHS disease phases their mechanisms of action are poorly understood. Read More

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Cutting Edge of the Pathogenesis of Atopic Dermatitis: Sphingomyelin Deacylase, the Enzyme Involved in Its Ceramide Deficiency, Plays a Pivotal Role.

Genji Imokawa

Int J Mol Sci 2021 Feb 5;22(4). Epub 2021 Feb 5.

Center for Bioscience Research & Education and Utsunomiya University, 350 Mine Utsunomiya, Tochigi 321-8505, Japan.

Atopic dermatitis (AD) is characterized clinically by severe dry skin and functionally by both a cutaneous barrier disruption and an impaired water-holding capacity in the stratum corneum (SC) even in the nonlesional skin. The combination of the disrupted barrier and water-holding functions in nonlesional skin is closely linked to the disease severity of AD, which suggests that the barrier abnormality as well as the water deficiency are elicited as a result of the induced dermatitis and subsequently trigger the recurrence of dermatitis. These functional abnormalities of the SC are mainly attributable to significantly decreased levels of total ceramides and the altered ceramide profile in the SC. Read More

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February 2021

Host Responses in an Human Skin Model Challenged With .

Front Cell Infect Microbiol 2020 21;10:561382. Epub 2021 Jan 21.

School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom.

species are a major part of the normal mycobiota and colonize mainly sebum-rich skin regions of the body. This group of fungi cause a variety of infections such as pityriasis versicolor, folliculitis, and fungaemia. In particular, and its allergens have been associated with non-infective inflammatory diseases such as seborrheic dermatitis and atopic eczema. Read More

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Afamelanotide for prevention of phototoxicity in erythropoietic protoporphyria.

Expert Rev Clin Pharmacol 2021 Feb;14(2):151-160

Porphyria Centre Rotterdam, Centre for Lysosomal and Metabolic Disease, Department of Internal Medicine, Erasmus University Medical Centre Rotterdam, The Netherlands.

: In erythropoietic protoporphyria (EPP), an inherited disorder of heme biosynthesis, accumulation of protoporphyrin IX results in acute phototoxicity. EPP patients experience severe burning pain after light exposure, which results in a markedly reduced quality of life. Afamelanotide is the first effective approved medical treatment for EPP, acting on melanocortin-1 receptors. Read More

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February 2021

Cutaneous Cell-Mediated Delayed Hypersensitivity to Intravitreal Bevacizumab.

Middle East Afr J Ophthalmol 2020 Jul-Sep;27(3):182-184. Epub 2020 Oct 30.

Department of Ocular Tumor, Orbital Disease and Ophthalmic Radiation Therapy., The New York Eye Cancer Center, New York, NY, USA.

The literature contains few reports describing autoimmune reactions to intravitreal bevacizumab and no Type-IV delayed hypersensitivity reactions. This was unexpected, as administration of intravenous bevacizumab has frequently caused dermatologic side-effects. This difference was likely attributable in part to the minimum 300-times difference between intravitreal versus intravenous dosing. Read More

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January 2021