Dermatite de contato pigmentada por cosmético / Pigmented cosmetic contact dermatitis

A dermatite de contato pigmentada se destaca por sua raridade, sendo associada a inúmeros alérgenos cosméticos e têxteis. Acomete predominantemente mulheres de meia idade e fototipos altos. O teste de contato é imprescindível para a identificação do agente causal. O tratamento indicado consiste no afastamento do agente causal, no uso de fotoprotetores, clareadores tópicos e, por vezes, procedimentos dermatológicos abrasivos. Relatamos um caso de dermatite de contato pigmentada por cosmético motivado pela exuberância clínica e desfecho satisfatório, ressaltando a importância da suspeição diagnóstica e do manejo adequado impactando neste desfecho.

Pigmented contact dermatitis is a rare condition associated with numerous cosmetic and textile allergens. It predominantly affects middle-aged women with high phototypes. The patch test is essential to identify the causative agent. Treatment includes removal of the causative agent, sunscreen use, administration of topical bleaching agents, and occasionally abrasive dermatologic procedures. We report a case of pigmented cosmetic contact dermatitis motivated by its clinical exuberance and satisfactory outcome, emphasizing the importance of diagnostic suspicion and adequate management impacting this outcome.

Neomycin: sources of contact and sensitization evaluation in 1162 patients treated at a tertiary service

Abstract Background: Neomycin is used in several over-the-counter pharmaceutical formulations in Brazil. In Europe and Canada, where it is not freely available, its sensitization frequency is lower than in the United States, where this does not occur. Objective: To present the frequency of sensitization to neomycin observed in a tertiary hospital and the pharmaceutical formulations sold in Brazil containing neomycin. Method: Retrospective analysis of positive results to neomycin, obtained through patch tests performed in a tertiary hospital, from 2009 to 2018 and investigation of topical drugs and vaccines containing neomycin in Brazilian databases available on the internet. Results: Among 1,162 patients, 71 (6%) had positive reactions to neomycin, 65% female and 35% male individuals, 46% were over 50 years old, and 24% had a personal history of atopy. The dermatitis lasted from four months to 20 years. Lesions were located in 69% of the patients on the upper limbs, in 55% they were on the lower limbs, and in 42% they were disseminated in more than 4 sites. Polysensitization was detected in 55% of cases. Of these, 28% were linked to sensitization to rubber allergens and 27% to potassium bichromate. A total of 158 topical presentations of neomycin were found: 79 ointments, 58 creams, 10 ophthalmic solutions, seven otological solutions, one oral solution, two nasal solutions, and one antiseptic powder, in addition to 11 types of vaccines. Study limitations: Retrospective study. Conclusion: Sensitization to neomycin occurred in 6% of the studied population, affecting more females aged over 50 years, with skin lesions located mainly on the upper and lower limbs, in the context of chronic contact dermatitis. Neomycin was found in 135 formulations, most of them available over the counter, as well as in 11 miscellaneous vaccines.

Patch tests and hand eczema: retrospective study in 173 patients and literature review

Abstract Background Hand eczema (HE) is a highly prevalent, recurrent, and multifactorial disease. It encompasses a group of eczematous diseases that affect the hands, etiologically classified into irritant contact dermatitis (ICD), allergic contact dermatitis (ACD) and atopic dermatitis (AD). Few epidemiological studies in Latin America have investigated the characteristics of patients with this condition and the origin of the disease. Objectives To analyze the profile of patients diagnosed with HE submitted to patch tests aiming to determine its etiology. Methods A retrospective descriptive study was carried out on epidemiological data and patch tests of patients with HE treated at a tertiary hospital in the city of São Paulo from January 2013 to December 2020. Results A total of 173 patients were studied, whose final diagnosis was 61.8% of ICD, 23.1% of ACD and 5.2% of AD, with diagnostic overlap in 42.8% of the cases. The main positive and relevant patch tests were: Kathon CG (42%), nickel sulfate (33%), and thiuram mix (18%). Study limitations The number of treated cases and socioeconomic profile was limited to a vulnerable population group. Conclusion HE is a diagnosis in which overlapping etiologies are frequent, with the main sensitizers identified in ACD being Kathon CG, nickel sulfate and thiuram mix.

Hancornia speciosa serum latex fraction: a non-allergenic biomaterial / Fração soro do látex de Hancornia speciosa: um biomaterial não alergênico

Abstract Plant-derived products can assist in the healing process of dermal wounds. It has been demonstrated that Hancornia speciosa latex present angiogenic, osteogenic, anti-inflammatory, and antioxidant activities. Then, it could contribute to the wound healing process. However, natural products in contact with skin may cause dermatitis. The objective of this work was to evaluate the allergic and irritant potential of H. speciosa serum fraction latex using in vitro assays. The obtained results showed that the H. speciosa serum fraction latex has a slightly irritant potential and is not cytotoxic neither allergenic for human cells. Moreover, we identified a remarkable low amount of proteins in this material in comparison to Hevea brasiliensis latex. This result could explain the non-allergenic potential of H. speciosa serum fraction latex because proteins present in latex are the main responsible for allergy. This biomaterial could be used as a non-allergenic source for development of new medicines.

Resumo Produtos derivados de plantas podem auxiliar no processo de cicatrização de feridas cutâneas. Foi demonstrado que o látex de Hancornia speciosa apresenta atividades angiogênicas, osteogênicas, antiinflamatórias e antioxidantes. Então, este biomaterial pode contribuir para o processo de cicatrização de feridas. No entanto, produtos naturais em contato com a pele podem causar dermatites. O objetivo deste trabalho foi avaliar o potencial alérgico e irritante do látex da fração soro de H. speciosa por meio de ensaios in vitro. Os resultados obtidos mostraram que o látex da fração do soro de H. speciosa possui um potencial pouco irritante e não é citotóxico nem alergênico para células humanas. Além disso, foi identificado uma notável baixa quantidade de proteínas neste material em comparação ao látex de Hevea brasiliensis. Esse resultado poderia explicar o potencial não alergênico do látex da fração soro de H. speciosa, pois as proteínas presentes no látex são as principais responsáveis ​​pela alergia. Este biomaterial pode ser utilizado como fonte não alergênica para desenvolvimento de novos medicamentos.

Occupational distribution and management strategies of occupational contact dermatitis / 环境与职业医学

Occupational contact dermatitis (OCD) is an occupational inflammatory skin disease. According to its pathogenesis, it can be divided into irritant contact dermatitis and allergic contact dermatitis. This review introduced the high-risk occupations of OCD, its incidence, common irritants and allergens, and corresponding treatments. Agriculture workers, construction workers, production workers, hairdressers, and medical workers are high-risk occupations of OCD who should be paid attention to.

Ozonated oil alleviates dinitrochlorobenzene-induced allergic contact dermatitis via inhibiting the FcεRI/Syk signaling pathway / 中南大学学报(医学版)

OBJECTIVES@#Ozone is widely applied to treat allergic skin diseases such as eczema, atopic dermatitis, and contact dermatitis. However, the specific mechanism remains unclear. This study aims to investigate the effects of ozonated oil on treating 2,4-dinitrochlorobenzene (DNCB)-induced allergic contact dermatitis (ACD) and the underling mechanisms.@*METHODS@#Besides the blank control (Ctrl) group, all other mice were treated with DNCB to establish an ACD-like mouse model and were randomized into following groups: a model group, a basal oil group, an ozonated oil group, a FcεRI-overexpressed plasmid (FcεRI-OE) group, and a FcεRI empty plasmid (FcεRI-NC) group. The basal oil group and the ozonated oil group were treated with basal oil and ozonated oil, respectively. The FcεRI-OE group and the FcεRI-NC group were intradermally injected 25 µg FcεRI overexpression plasmid and 25 µg FcεRI empty plasmid when treating with ozonated oil, respectively. We recorded skin lesions daily and used reflectance confocal microscope (RCM) to evaluate thickness and inflammatory changes of skin lesions. Hematoxylin-eosin (HE) staining, real-time PCR, RNA-sequencing (RNA-seq), and immunohistochemistry were performed to detct and analyze the skin lesions.@*RESULTS@#Ozonated oil significantly alleviated DNCB-induced ACD-like dermatitis and reduced the expressions of IFN-γ, IL-17A, IL-1β, TNF-α, and other related inflammatory factors (all P<0.05). RNA-seq analysis revealed that ozonated oil significantly inhibited the activation of the DNCB-induced FcεRI/Syk signaling pathway, confirmed by real-time PCR and immunohistochemistry (all P<0.05). Compared with the ozonated oil group and the FcεRI-NC group, the mRNA expression levels of IFN-γ, IL-17A, IL-1β, IL-6, TNF-α, and other inflammatory genes in the FcεRI-OE group were significantly increased (all P<0.05), and the mRNA and protein expression levels of FcεRI and Syk were significantly elevated in the FcεRI-OE group as well (all P<0.05).@*CONCLUSIONS@#Ozonated oil significantly improves ACD-like dermatitis and alleviated DNCB-induced ACD-like dermatitis via inhibiting the FcεRI/Syk signaling pathway.

Importância e aspectos clínicos da dermatite de contato por própolis / Importance and clinical aspects of propolis contact dermatitis

Objetivos: própolis é a substância resinosa que as abelhas coletam de plantas para a construção de suas colmeias. O objetivo dessa revisão foi ressaltar a importância do diagnóstico de dermatite de contato relacionada com própolis e aspectos clínicos relevantes dessa doença. Métodos: revisão narrativa da literatura realizada através da pesquisa nas bases de dados National Library of Medicine (PubMed) e Scientific Eletronic Library Online (SciELO). Resultados: foram encontrados 246 artigos e, após o processo de seleção e leitura, foram incluídas 32 publicações. Conclusões: a hipersensibilidade tardia ao própolis é de extrema importância pois a prevalência dessa alergia é crescente em diversas partes do mundo. Precisamos de estudos nacionais para avaliar nossa realidade. A comprovação de alta prevalência em nosso meio permitirá a inclusão desta substância em outras baterias de testes de contato em nosso país

Aims: propolis is the resinous substance that bees collect from plants to build their hives. The aim of this review was to highlight the importance of diagnosing propolis-related contact dermatitis and relevant clinical aspects of this disease. Methods: narrative literature review carried out by searching the National Library of Medicine (PubMed) and Scientific Electronic Library Online (SciELO) databases. Results: a total of 246 articles were found and, after the selection and reading process, 32 publications were included. Conclusions: delayed-type hypersensitivity to propolis is extremely important because the prevalence of this allergy is increasing in various parts of the world. We need national studies to assess our reality. Proof of the high prevalence in our country will allow this substance to be included in other patch tests series in our country

Allergic contact hand dermatitis due to constituents of nitrile gloves

Purpose: This report of a case of allergic contact hand dermatitis due to constituents of nitrile gloves is to bring to the attention of practitioners four important practice points: 1) allergic contact dermatitis may occur due to exposure to chemicals in nitrile gloves; 2) skin patch testing is used to identify the causative allergens; 3) targeted allergens may be necessary in addition to the baseline European standard series if the standard series is unhelpful; and 4) there are potential interventions to manage nitrile glove dermatitis. Findings: A laboratory analyst had occupational exposure to several allergens and had worn latex gloves. She was exposed to laboratory chemicals and powdered ore dust, containing precious metals. She developed hand dermatitis and was relocated to administrative duties not requiring glove use. Her dermatitis cleared but recurred when she returned to the laboratory and started using nitrile gloves. On history, nitrile gloves and platinum group metal ore dust were consistently associated with her hand dermatitis, but laboratory chemicals were not. Latex-specific immunoglobulin E (IgE) was negative, as were skin patch tests for 13 allergens in the metal series, including salts of platinum group metals. She had positive allergic reactions to cobalt chloride, formaldehyde, nickel sulphate, and quaternium 15 in the European standard series patch tests. She did not react to the rubber chemicals in the European standard series, including thiuram mix. The patient was then tested with the rubber additives series because of the glove-relatedness of her hand dermatitis. She had positive reactions to three thiuram compounds used as accelerators in rubber gloves. The patient went on vacation during which time her dermatitis improved. She was relocated to a position without glove use or ore contact and her dermatitis did not recur. Conclusions: An analytic laboratory worker developed hand allergic contact dermatitis due to nitrile glove constituents. The diagnosis is supported by the improvement in her dermatitis after cessation of glove use, negative metal series patch tests, and positive patch tests to accelerators found in rubber gloves. Nevertheless, a contribution to the dermatitis by metals in the platinum group metal ore dust cannot be excluded. Recommendations: Nitrile glove constituents should be considered in wearers who develop hand dermatitis. Skin patch testing is recommended to investigate putative agents. Specific patch test series for more targeted testing may be required

Hancornia speciosa serum latex fraction: a non-allergenic biomaterial / Fração soro do látex de Hancornia speciosa: um biomaterial não alergênico

Plant-derived products can assist in the healing process of dermal wounds. It has been demonstrated that Hancornia speciosa latex present angiogenic, osteogenic, anti-inflammatory, and antioxidant activities. Then, it could contribute to the wound healing process. However, natural products in contact with skin may cause dermatitis. The objective of this work was to evaluate the allergic and irritant potential of H. speciosa serum fraction latex using in vitro assays. The obtained results showed that the H. speciosa serum fraction latex has a slightly irritant potential and is not cytotoxic neither allergenic for human cells. Moreover, we identified a remarkable low amount of proteins in this material in comparison to Hevea brasiliensis latex. This result could explain the non-allergenic potential of H. speciosa serum fraction latex because proteins present in latex are the main responsible for allergy. This biomaterial could be used as a non-allergenic source for development of new medicines.

Produtos derivados de plantas podem auxiliar no processo de cicatrização de feridas cutâneas. Foi demonstrado que o látex de Hancornia speciosa apresenta atividades angiogênicas, osteogênicas, antiinflamatórias e antioxidantes. Então, este biomaterial pode contribuir para o processo de cicatrização de feridas. No entanto, produtos naturais em contato com a pele podem causar dermatites. O objetivo deste trabalho foi avaliar o potencial alérgico e irritante do látex da fração soro de H. speciosa por meio de ensaios in vitro. Os resultados obtidos mostraram que o látex da fração do soro de H. speciosa possui um potencial pouco irritante e não é citotóxico nem alergênico para células humanas. Além disso, foi identificado uma notável baixa quantidade de proteínas neste material em comparação ao látex de Hevea brasiliensis. Esse resultado poderia explicar o potencial não alergênico do látex da fração soro de H. speciosa, pois as proteínas presentes no látex são as principais responsáveis pela alergia. Este biomaterial pode ser utilizado como fonte não alergênica para desenvolvimento de novos medicamentos.

Hancornia speciosa serum latex fraction: a non-allergenic biomaterial

Abstract Plant-derived products can assist in the healing process of dermal wounds. It has been demonstrated that Hancornia speciosa latex present angiogenic, osteogenic, anti-inflammatory, and antioxidant activities. Then, it could contribute to the wound healing process. However, natural products in contact with skin may cause dermatitis. The objective of this work was to evaluate the allergic and irritant potential of H. speciosa serum fraction latex using in vitro assays. The obtained results showed that the H. speciosa serum fraction latex has a slightly irritant potential and is not cytotoxic neither allergenic for human cells. Moreover, we identified a remarkable low amount of proteins in this material in comparison to Hevea brasiliensis latex. This result could explain the non-allergenic potential of H. speciosa serum fraction latex because proteins present in latex are the main responsible for allergy. This biomaterial could be used as a non-allergenic source for development of new medicines.

Resumo Produtos derivados de plantas podem auxiliar no processo de cicatrização de feridas cutâneas. Foi demonstrado que o látex de Hancornia speciosa apresenta atividades angiogênicas, osteogênicas, antiinflamatórias e antioxidantes. Então, este biomaterial pode contribuir para o processo de cicatrização de feridas. No entanto, produtos naturais em contato com a pele podem causar dermatites. O objetivo deste trabalho foi avaliar o potencial alérgico e irritante do látex da fração soro de H. speciosa por meio de ensaios in vitro. Os resultados obtidos mostraram que o látex da fração do soro de H. speciosa possui um potencial pouco irritante e não é citotóxico nem alergênico para células humanas. Além disso, foi identificado uma notável baixa quantidade de proteínas neste material em comparação ao látex de Hevea brasiliensis. Esse resultado poderia explicar o potencial não alergênico do látex da fração soro de H. speciosa, pois as proteínas presentes no látex são as principais responsáveis pela alergia. Este biomaterial pode ser utilizado como fonte não alergênica para desenvolvimento de novos medicamentos.

Clinical characteristics of patients with skin adverse reactions of cosmetics: report of 132 cases / 中华医学美学美容杂志

Objective:To analyse the skin clinical characteristics of adverse reactions to cosmetic products.Methods:A total of 132 patients suffered with the skin adverse reactions of cosmetics were collected in the Department of Dermatology in the First Affiliated Hospital of Xinxiang Medical University from January 2021 to December 2021. There were 5 males and 127 females, aged 2-66 (34.0±13.1) years. and the personal information, medical records, clinical characteristics and the cosmetic information as well as laboratory results were collected.Results:The major types of adverse reactions to cosmetic products were contact dermatitis (86.4%). Head was the most commonly affected site, The most common symptoms were pruritus and burning sensation (83.9%), and sores, dryness, tightness of the skin, and the common skin lesions included erythema and papula (92.9%). Suspected cosmetics were mostly skin care products (45 cases) and freckle removing products (30 cases). Only 7 patients accepted patch tests, 1 case had negative results and others were all tested positive.Conclusions:Adverse drug reactions affect young and middle-aged women mostly. Contact dermatitis is the most common adeverse reaction to cosmetic products and the patch test is still the most effective method in helping diagnosing contact dermatitis to cosmetic products.

Patch testing with expired Indian patch test kits: Results of a pilot study

Background: The reliability of patch testing with expired Indian standard patch test kits has been not evaluated before. Methods: Thirty adults (men:women 25:5) with allergic contact dermatitis were divided into three groups of ten patients each for patch testing by Finn chamber® method using Indian standard patch test kits having expiry in 2016, 2015 and 2014. The results were compared with those from a new kit with 2018 expiry. Results: Ten patients in group-1, eight patients in group-2 and seven patients in group-3 developed positive reactions of identical intensities and mostly from identical allergens from all four kits. The major contact allergens eliciting positive reactions of identical intensities were parthenium in nine, five and three patients, colophony in four, one and zero patients, fragrance mix in three, three and one patients, thiuram mix in three, one and one patients, and paraphenylene diamine in two, one and three patients from group-1,-2, and -3, respectively. Limitations: Small number of patients in each group remains the major limitation of the study. Whether or not these results can be extrapolated with patch test results from other similar patch test kits available across countries also needs confirmation. Conclusion: The patch test allergens can be used beyond labeled expiry dates but needs confirmation by a few large studies and using other available patch test kits. This is important as the relevance of patch test results for individual allergen in this scenario may remain debatable requiring careful interpretation

Protocolo de Avaliação de Sensibilidade Dermatológica para Pessoas com Estomias de Eliminação / Dermatological Sensitivity Assessment Protocol for People With Elimination Stomas / Protocolo de Evaluación de Sensibilidad Dermatológica para Personas con Stomos de Eliminación

Objetivo:Construir e validar um protocolo clínico direcionado à avaliação de sensibilidade dermatológica ocasionada por dispositivos coletores e adjuvantes utilizados por pessoas com estomias. Metodologia:Pesquisa metodológica, desenvolvida entre os anos de 2020 e 2021, para construção e validação de um protocolo de avaliação dermatológica para pessoas com estomias de eliminação. A construção do protocolo percorreu as etapas: diagnóstico situacional teórico, levantamento do referencial teórico e desenvolvimento do protocolo. Resultados: Para validação foram recrutados 21 juízes, enfermeiros, com experiência na área de Estomaterapia, cujo instrumento para validação do conteúdo avaliou objetivos, estrutura e relevância da tecnologia, sendo disponibilizado via e-mail por formulário eletrônico na plataforma Google Forms. Para análise dos dados utilizou-se a estatística descritiva e o cálculo de índice de validade de conteúdo (IVC). Obteve-se escore global de concordância entre os juízes de 0,92. Conclusão: Conclui-se que o protocolo criado possui fundamentação e validação prática, versatilidade de aplicação, viabilizando um processo assistencial mais congruente com a realidade da pessoa com estomia de eliminação.

Objective:To build and validate a clinical protocol aimed at evaluating the dermatological sensitivity caused by collection devices and adjuvants used by people with stomas. Methodology: Methodological research, developed between 2020 and 2021, for the construction and validation of a dermatological evaluation protocol for people with elimination stomas. The construction of the protocol went through the steps: theoretical situational diagnosis, survey of the theoretical framework and development of the protocol. Results: For validation, 21 judges, nurses, with experience in the area of enterostomal therapy, were recruited, whose instrument for content validation evaluated objectives, structure and relevance of the technology, being made available via e-mail through an electronic form on the Google Forms platform. For data analysis, descriptive statistics and the calculation of content validation index were used. A global score of agreement between the judges of 0.92 was obtained. Conclusion: It is concluded that the protocol created has a practical basis and validation, application versatility, enabling a care process that is more congruent with the reality of the person with an elimination stoma.

Objetivo:Construir y validar un protocolo clínico dirigido a la evaluación de la sensibilidad dermatológica provocada por los dispositivos colectores y adyuvantes utilizados por personas con ostomías. Metodología: Investigación metodológica, desarrollada entre 2020 y 2021, para la construcción y validación de un protocolo de evaluación dermatológica para personas con estomas de eliminación. La construcción del protocolo pasó por las etapas: diagnóstico situacional teórico, levantamiento del marco teórico y desarrollo del protocolo. Resultados: Para la validación fueron reclutados 21 jueces, enfermeros, con experiencia en el área de Estomaterapia, cuyo instrumento para validación de contenido evaluó objetivos, estructura y pertinencia de la tecnología, estando disponible vía e-mail a través de formulario electrónico en Google Plataforma de formularios. Para el análisis de los datos se utilizó la estadística descriptiva y el cálculo del Índice de Validación de Contenido. Se obtuvo una puntuación global de concordancia entre los jueces de 0,92. Conclusión: Se concluye que el protocolo creado tiene base práctica y validación, versatilidad de aplicación, posibilitando un proceso de atención más congruente con la realidad de la persona con ostomía de eliminación.

Exantema intertriginosoflexural y simétrico (SDRIFE) por piroxicam: a propósito de un caso clínico / Symmetrical drug related intertriginous and flexural exanthema secondary to piroxicam: a case report

Resumen El exantema intertriginoso y flexural simétrico por fármacos (SDRIFE) es una toxicodermia que se presenta con exantema limitado a pliegues, sobretodo en región glútea y genital, y representa una reacción a la exposición sistémica a un medicamento sin sensibilización previa. Presentamos el caso de una paciente mujer adulta previamente sana, que consulta por este tipo de reacción medicamentosa asociada al uso de piroxicam intramuscular, manejada de forma exitosa con antihistamínicos, esteroides tópicos y sistémicos.

Abstract Symmetrical drug related intertriginous and flexural exanthema is a cutaneous drug eruption that is characterized by exanthema limited to creases, buttocks and the upper inner thighs. It represents a reaction to systemic exposure to a drug, without previous sensitization. We present the case of a woman, previously healthy, who consulted due to this drug reaction after being injected with piroxicam, who was successfully treated with antihistamines, topical and systemic corticosteroids.

Perfil demográfico e clínico de casos ocupacionais de sensibilização a metilisotiazolinona e Kathon CG: estudo seccional / Demographic and clinical profile of occupational cases of sensitization to methylisothiazolinone and Kathon CG: a cross-sectional study

Resumo Introdução: a metilisotiazolinona isolada ou associada à metilcloroisotiazolinona (Kathon CG) é um conservante relacionado à dermatite de contato alérgica ocupacional. Objetivos: avaliar o perfil demográfico e clínico dos casos ocupacionais de sensibilização a isotiazolinonas no município do Rio de Janeiro e descrever a presença desses preservativos em tintas nacionais. Métodos: estudo transversal baseado em informações de prontuários de trabalhadores submetidos a testes de contato entre 2013-2017. Descreveu-se a prevalência de características clínicas, demográficas e ocupacionais e utilizou-se um modelo não-ajustado para investigar a associação entre variáveis. Buscou-se a presença e a concentração de isotiazolinonas nas fichas de composição química de tintas nacionais. Resultados: dentre os 768 trabalhadores submetidos aos testes, 68 apresentavam dermatose ocupacional com resultado positivo para sensibilização à metilisotiazolinona/Kathon CG. As profissões mais acometidas foram as relacionadas a atividades domésticas e limpeza. Houve maior chance de sensibilização às isotiazolinonas nas mulheres e naqueles com acometimento das mãos e das pernas. Entre as 61 tintas avaliadas, 26 possuíam alguma isotiazolinona, sendo a metilcloroisotiazolinona a mais comum. Conclusões: a sensibilização às isotiazolinonas pode impactar a saúde do trabalhador e demanda maior vigilância com materiais de limpeza e cosméticos, assim como a discussão da regulação da composição de tintas comercializadas no país.

Abstract Introduction: methylisothiazolinone alone or associated with methylchloroisothiazolinone (Kathon CG) is a preservative related to occupational allergic contact dermatitis. Objectives: to evaluate the demographic and clinical profile of occupational cases of sensitization to isothiazolinones in the city of Rio de Janeiro and to describe the presence of these preservatives in national paints. Methods: cross-sectional study based on information from medical records of workers who underwent patch testing between 2013-2017. The prevalence of clinical, demographic and occupational characteristics was described and an unadjusted model was used to investigate the association between variables. We sought the presence and concentration of isothiazolinones in the chemical composition sheets of national paints. Results: among the 768 workers submitted to the tests, 68 had occupational dermatosis with a positive result for sensitization to methylisothiazolinone/Kathon CG. The most affected occupations were those related to domestic activities and cleaning. There was a greater likelihood of sensitization to isothiazolinones in women and in those with involvement of the hands and legs. Among the 61 paints evaluated, 26 had some isothiazolinone, with methylchloroisothiazolinone being the most common. Conclusions: sensitization to isothiazolinones can impact workers' health and demands greater vigilance on cleaning materials and cosmetics, as well as discussing the composition regulation of the paints sold in Brazil.

Lesiones cutáneas asociadas al uso de bombas de insulina y sistemas de monitoreo: un problema desafiante / Insulin pumps and glucose monitors related cutaneous lesions: a challenging problem

Los cuidados actuales de la diabetes incluyen altos niveles de tecnología y los pacientes utilizan diferentes dispositivos que pueden ayudar en su control metabólico, pero pueden impactar negativamente en su piel. Sensores de glucosa como el Freestyle, Dexcom, el Enlite de Medtronic y los sistemas de infusión continua de insulina contienen diferentes productos químicos que están en contacto directo con la piel del paciente y pueden causar una dermatitis irritativa o de contacto alérgica. Las lesiones incluyen eczema, prurito, heridas, cicatrices y cambios en la pigmentación de la piel. Los productos químicos involucrados que pueden ocasionarlas son el isobornil acrilato, N, N- dimetilacrilamida, etil cianoacrilato y colophonium, forzando a los pacientes a cambiar los sitios de infusión, el set de infusión o el sensor mismo más pronto de lo esperado, para reducir el nivel de daño en la piel. Existe gran número de productos que permiten proteger la piel y reducir el contacto de la piel con la cánula de la bomba o el sensor. Para reducir o prevenir el daño existen productos como cremas o spray y parches de hidrocoloide que actúan como barrera y existen técnicas para aplicar y retirar cuidadosamente los parches y adhesivos de los dispositivos. Una vez que las lesiones se han producido, el tratamiento incluye pomadas y a veces corticoides tópicos y/o antibióticos. Para prevenir o reducir el daño de la piel asociado al sensor y uso de la bomba de insulina, la industria que los produce debería incluir la información en relación a los productos químicos incluidos en cada dispositivo.

Diabetes care nowadays includes a high level of technology and patients use different devices which can help them in their glycemic control, but can have a negative impact on their skin. Glucose sensors such as Freestyle, Dexcom, Medtronic Enlite and also continuous subcutaneous insulin infusion systems contain different chemical products which are in direct contact with the patient's skin and can cause irritative or allergic contact dermatitis. Lesions include eczema, pruritus, wounds, scars and changes in skin pigmentation. The chemical products which can induce them are isobornyl acrylate, N, N- dimethylacrylamide, ethyl cyanoacrylate and colophonium, forcing patients to change the infusion site, set or the sensor itself, earlier than expected, in order to reduce the level of skin damage. There are a number of products which can protect the skin and reduce it's contact with the pump cannula or the sensor. To reduce or prevent damage, we have products such as barrier cream or spray films and hydrocolloid blister plasters and actions such as careful application and removal of device's patches and adhesives. Once lesions are established, treatment includes ointments and sometimes topical steroids and/ or antibiotics. In order to prevent or reduce skin damage related to sensor and insulin pump use, the manufacturers should include the information related to the chemicals included in each device.

Pharmacological mechanism of traditional Chinese medicine in the treatment of allergic contact dermatitis / 中国药房

Allergic contact dermatitis （ACD）is a common type Ⅳ allergic disease ，which has a wide range of patients ，and seriously affects the quality of patients ’lives. To understand the pharmacological mechanism of traditional Chinese medicine （TCM）in the treatment of ACD ，and to provide reference for clinical application and new drug research and development ，the relevant research literatures were reviewed from aspects of pathogenesis of ACD ，traditional Chinese medicine that can be used to treat ACD and its mechanism of action. TCM for the treatment of ACD mainly include heat-clearing medicines （Sophora flavescens，Dictamnus dasycarpus ），exterior-releasing medicines （Cinnamomum cassia ，Xanthium sibiricum ，Saposhnikovia divaricata），antirheumatic medicines （Tripterygium wilfordii ，Cynanchum paniculatum ），and damp-draining medicines （Plantago asiatica，Kochia scoparia ），etc. The main mechanisms include inhibition of IgE secretion ，regulation of Th 1/Th2 cell and Th 17/ Treg balance ，reduction of mast cells degranulation ratio ，inhibition of pERK 1/2/TLR4/NF-κ B pathway，AIM2/caspase-1 inflammasome signaling pathway ，Wnt/β-catenin pathway ，STAT3 pathway and MAPK pathway.

Research progress on prevention of hand occupational contact dermatitis in nurses / 中国实用护理杂志

Occupational contact dermatitis is the most common occupational skin disease. It has a high incidence among healthcare workers, especially nurses. It has an impact on work and life. This paper reviews the research progress, risk factors, intervention measures, evaluation indicators of nurses′ hand occupational contact dermatitis, and provides references for the future researches.

Anti-inflammatory Effects of Ampelopsis Japonica Root on Contact Dermatitis in Mice / 中国结合医学杂志

OBJECTIVE@#To investigate the anti-inflammatory potential of Ampelopsis japonica on contact dermatitis (CD).@*METHODS@#A total of 38 Balb/c mice were divided into 5 groups by using a random number table: normal mice (n=6), CD model mice (n=8), CD mice treated with 3 or 30 mg/kg of the ethanol extract of A. japonica (EEAJ, n=8) and 7.5 mg/kg dexamethasone treated CD mice (DEX, n=8). CD was induced using topical application of 1-fluoro-2,4-dinitrofluorobenzene in mice. EEAJ and DEX were topically applied to the shaved skin of each mouse for 6 days, and the effects of EEAJ and DEX on skin lesions and color, histopathological abnormalities such as epidermal hyperplasia and immune cell infiltration, and tumor necrosis factor (TNF)-α, interleukin-6 (IL-6), and monocyte chemoattractant protein-1 (MCP-1) production were investigated. The effects on changes in body weights and spleen/body weight ratio were also investigated.@*RESULTS@#EEAJ at 30 mg/kg significantly prevented scaling, erythema and enlargement of skin weight compared to using carbon dioxide. EEAJ also prevented epithelial hyperplasia and immune cell infiltrations induced by repeated application of DNFB (P<0.01). In addition, EEAJ significantly lowered levels of TNF-α, IL-6 and MCP-1 (P<0.05 or P<0.01). The anti-inflammatory effects of EEAJ were similar to those of DEX.@*CONCLUSION@#A. japonica may be a new therapeutic agent with the potential to reduce or replace corticosteroids and its mechanisms are closely related to regulation of TNF-α production.

Investigation on an incident of occupational contact dermatitis in a farm / 预防医学

Objective@#To investigate the cause of an incident of occupational contact dermatitis in a farm in Tianjin Prefecture, so as to provide insights into occupational safety.@*Methods@#The disinfection process, use of disinfectants and individual protective measures in this farm were collected, and a field epidemiological investigation was conducted to collect the demographic characteristics, history of occupational contact, clinical symptoms, diagnosis and treatment data, and onset of disease among individuals with the same type of job. The cause of this incident was analyzed.@*Results@#There were ten interns exposed to potassium hydrogen sulfate compounds simultaneously in this farm, and then, nine interns developed skin flushing across the body, and swelling and itching of the skin. Among these ten interns, five individuals were admitted to hospitals because of severe symptoms and were then clinically diagnosed as systemic contact dermatitis. All five individuals were cured following treatments. Epidemiological survey showed that all cases had a definite history of occupational contact with potassium hydrogen sulfate compounds but without use of any protective agents. In addition, there were thirty-five individuals with the same type of job in this farm that developed similar symptoms when they joined in the disinfection for the first time, and these individuals were self-cured following cessation to contact; however, recurrence of symptoms was found following contacts again.@*Conclusion@#This is a cluster of occupational contact dermatitis caused by exposure to potassium hydrogen sulfate compound.