18 documents found, page 1 of 2

Atopic dermatitis and vitamin D

Abstract Atopic dermatitis (AD) results from the interaction between dysfunction of the skin barrier, dysregulation of the immune system, and alteration of the skin microbiome. As the most common inflammatory skin disease worldwide and still increasing, it is a real health problem. Vitamin D deficiency is also considered a global problem affecting 13 out of 100 people in Europe. Since vitamin D is involved in t...

Omalizumab and new therapeutic targets in chronic spontaneous urticaria

Abstract Chronic spontaneous urticaria (CSU) is a common and distressing skin disease characterized by itchy wheals, angioedema, or both. There is currently no cure for CSU and symptomatic treatment is often insufficient. Omalizumab, a humanized anti-immunoglobulin (Ig) E monoclonal antibody, remains the only biological drug licensed for CSU, almost a decade after its approval. However, growing knowledge of the...

New changes implemented in the Portuguese Journal of Dermatology and Venereolog...

Fluoroquinolones as enhancers of photocarcinogenesis: Proposed pathomechanisms

Abstract Fluoroquinolones are photosensitizing drugs in humans, as they can enhance effects of ultraviolet A (UVA) radiation on the skin. UVA causes lesions both to deoxyribonucleic acid and other cellular organelles by Type I and Type II reactions (major and minor). The resulting photoproducts are highly reactive and can change the chemical composition of nucleotide bases, induce strand breaks and disrupt macr...

Perforating necrobiosis lipoidica in an old surgical scar

Abstract Necrobiosis lipoidica (NL) is an idiopathic granulomatous disease, frequently associated with diabetes mellitus. Histologically, it is characterized by palisaded granulomas involving the deep dermis, but the epidermis is usually spared. We describe a case of perforating NL (PNL), a rare variant of NL, occurring in an atypical location–an old surgical scar on the elbow–in a 70-year-old, non-diabetic, fe...

Drug-induced photosensitivity

Abstract Drug photosensitivity is a relatively frequent adverse event, although not always recognized due to its clinical polymorphism and difficulties in performing tests to prove drug causality. The aim of this report is to review the mechanisms of photosensitivity related with topical and systemic drugs (phototoxicity, photoallergy, autoimmunity, and enhanced photocarcinogenesis), the main acute and delayed ...

Questionário recomendado pelo Grupo Português de Estudos de Urticária (GPEU) pa...

RESUMO A urticária crónica (UC) é uma doença complexa, multifatorial, com diferentes fenótipos e endótipos, comum na prática clínica e que tem um impacto significativo na qualidade de vida do doente. O diagnóstico é essencialmente clínico. Os exames complementares podem contribuir para despistar fatores etiológicos/de agravamento e/ou comorbilidades, mas são escassos os biomarcadores de diagnóstico e/ou prognós...

Biomarcadores na Urticária Crónica Espontânea

RESUMO Introdução: Atualmente, a compreensão sobre a etiopatogenia da urticária crónica espontânea é escassa. Devido à carência de dados sobre a sua etiologia, o tratamento disponível tem apenas como objetivo o controlo sintomático, com a maioria dos doentes a serem resistentes à primeira e segunda linha terapêutica (anti-H1 de segunda geração). Tendo em conta o seu impacto no doente e o difícil controlo sintom...

Epidermal Barrier Dysfunction in Atopic Dermatitis

ABSTRACT Impaired skin barrier is one of the hallmarks of atopic dermatitis (AD), with abnormalities in the cornified envelope, lipid lamellae, tight junctions and cutaneous microbiome. These findings are also present in nonlesional skin of AD individuals, suggesting that epidermal barrier defects may be the initial step towards the development of AD and eventually other atopic diseases (atopic march). It is cu...

Occupational Allergic Contact Dermatitis in Wind Turbine Blades Production

ABSTRACT Introduction: Epoxy resins, widely used in several industrial sectors, are among the main causes of allergic contact dermatitis. The wind turbine production industry is one of the sectors that uses these products widely. This study aimed to assess the prevalence of contact allergy to epoxy resin and its components among wind turbine blades production workers with suspected contact dermatitis. Methods: ...