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1.
J Manag Care Spec Pharm ; 28(1): 69-77, 2022 Jan.
Article in English | MEDLINE | ID: mdl-34949118

ABSTRACT

BACKGROUND: Although previous studies have reported the economic burden of atopic dermatitis (AD) in adults, updates are needed using more current data and measure of disease severity. OBJECTIVE: To describe the health care resource utilization (HCRU) and associated costs in US adults diagnosed with AD overall and by disease severity. METHODS: This real-world retrospective study identified adults aged at least 18 years who received a clinical diagnosis of AD in a dermatology electronic medical record (EMR) database between 2016 and 2018 (first record = index date), which was linked to an administrative claims database. Patients were required to have an AD diagnostic code and at least 6 months of continuous enrollment in medical and pharmacy benefits before and after the index date. Baseline severity was assessed using the Physician Global Assessment score closest to the index date. Inpatient and outpatient services, visits to specialists and its seasonality, treatment use, and associated annual direct health care costs were reported using descriptive statistics. RESULTS: Annual all-cause direct health care costs were $10,474 per patient per year and primarily driven by outpatient visits and pharmacy use. Compared with patients with clear to mild disease, more AD patients with severe disease had at least 1 dermatology (73.0% vs 58.5%) and allergy/immunology office visit (16.0% vs 5.5%) and AD-related medications (90.0% vs 64.3%). All-cause total annual costs in patients with severe disease ($23,242) were significantly higher than in patients with clear to mild disease ($8,936; P = 0.0002). Little seasonal variation in dermatology office visits was observed. CONCLUSIONS: Significant economic burden primarily driven by outpatient and pharmacy utilization was observed in AD patients, which increased with disease severity. DISCLOSURES: This work was sponsored by Eli Lilly and Company. Gorritz and Wade are employees of IQVIA, which was contracted by Eli Lilly and Company to conduct this study and develop the manuscript. Wang was employed by IQVIA at the time of this study. Malatestinic and Goldblum are employees and stockholders of Eli Lilly and Company. Boytsov was an employee of Eli Lilly at the time of this research.


Subject(s)
Dermatitis, Atopic , Health Care Costs , Patient Acceptance of Health Care , Patient Acuity , Adolescent , Adult , Aged , Dermatitis, Atopic/drug therapy , Dermatitis, Atopic/physiopathology , Electronic Health Records , Female , Humans , Male , Middle Aged , Patient Acceptance of Health Care/statistics & numerical data , Retrospective Studies , United States , Young Adult
2.
Expert Opin Drug Deliv ; 17(11): 1615-1630, 2020 11.
Article in English | MEDLINE | ID: mdl-32816566

ABSTRACT

INTRODUCTION: Immunological skin dysfunctions trigger the synthesis and release of inflammatory cytokines, which induce recurrent skin inflammation associated with chronic itching, inefficient barrier behavior, and reduced skin hydration. These features characterize a multifactorial chronic inflammatory disease atopic dermatitis (AD). AD therapy includes anti-inflammatory drugs and immunosuppressors as well as non-pharmacological alternatives such as emollients, moisturizers, and lipids (ceramides, phospholipids) for modulating the skin hydration and the barrier repair. However, these treatments are inconvenient with low drug skin penetration and insufficient maintenance on the application site. AREAS COVERED: Nanotechnology-based therapies can be a great strategy to overcome these limitations. Considering the particular skin morphological organization, SC lipid matrix composition, and immunological functions/features related to nanocarriers, this review focuses on recent developments of nanoparticulate systems (polymeric, lipid-based, inorganic) as parent or hybrid systems including their chemical composition, physico-chemical and biopharmaceutical properties, and differential characteristics that evaluate them as new effective drug-delivery systems for AD treatment. EXPERT OPINION: Despite the several innovative formulations, research in nanotechnology-based carriers should address specific aspects such as the use of moisturizers associated to pharmacological therapies, toxicity studies, scale-up production processes and the nanocarrier influence on immunological response. These approaches will help researchers choose the most appropriate nanocarrier system and widen nanomedicine applications and commercialization.


Subject(s)
Dermatitis, Atopic/drug therapy , Nanomedicine , Animals , Ceramides/administration & dosage , Dermatitis, Atopic/physiopathology , Emollients/administration & dosage , Humans , Lipids/therapeutic use , Skin/pathology
3.
Rev Assoc Med Bras (1992) ; 64(11): 997-1001, 2018 Nov.
Article in English | MEDLINE | ID: mdl-30570050

ABSTRACT

OBJECTIVE: Atopic dermatitis is a common skin disease. Its increased incidence has changed the focus of research on atopic dermatitis toward epidemiology, prevention, and treatment. METHODS: Evidence suggests that intestinal microbiota plays an important role in the pathogenesis of atopic dermatitis inducing immunosuppression, but its exact mechanism is still unclear. Probiotics have been widely reported to act on the immune system. They are living microorganisms with immunomodulatory effects that stimulate Th1 cytokines and suppress the Th2 response, which are being researched for the treatment of several diseases. Probiotics most commonly used are part of the intestinal microflora like lactobacilli, bifidobacteria, and enterococci. RESULTS: We describe here a case of evident response to the use of probiotics in a girl with severe atopic dermatitis, with a significant change in severity scores of atopic dermatitis (BSA/SCORAD/FDLQI). CONCLUSIONS: Modulation of the intestinal microbiota with probiotics may offer a way to prevent or treat allergic diseases, including atopic dermatitis.


Subject(s)
Dermatitis, Atopic/therapy , Probiotics/therapeutic use , Cytokines , Dermatitis, Atopic/microbiology , Dermatitis, Atopic/physiopathology , Female , Humans , Immune System/physiopathology , Infant , Lactobacillus/classification , Skin/pathology , Th1 Cells , Th2 Cells
4.
Rev. Assoc. Med. Bras. (1992, Impr.) ; Rev. Assoc. Med. Bras. (1992, Impr.);64(11): 997-1001, Nov. 2018. graf
Article in English | LILACS | ID: biblio-1041012

ABSTRACT

SUMMARY Atopic dermatitis is a common skin disease. Its increased incidence has changed the focus of research on atopic dermatitis toward epidemiology, prevention, and treatment. Evidence suggests that intestinal microbiota plays an important role in the pathogenesis of atopic dermatitis inducing immunosuppression, but its exact mechanism is still unclear. Probiotics have been widely reported to act on the immune system. They are living microorganisms with immunomodulatory effects that stimulate Th1 cytokines and suppress the Th2 response, which are being researched for the treatment of several diseases. Probiotics most commonly used are part of the intestinal microflora like lactobacilli, bifidobacteria, and enterococci. We describe here a case of evident response to the use of probiotics in a girl with severe atopic dermatitis, with a significant change in severity scores of atopic dermatitis (BSA/SCORAD/FDLQI). Modulation of the intestinal microbiota with probiotics may offer a way to prevent or treat allergic diseases, including atopic dermatitis.


RESUMO A dermatite atópica é uma doença de pele comum. O aumento da incidência mudou o foco da pesquisa em dermatite atópica para epidemiología, prevenção e tratamento. Evidências sugerem que a microbiota intestinal desempenha um papel importante na patogênese da dermatite atópica, induzindo imunossupressão, mas o mecanismo exato ainda não está claro. Os probióticos foram amplamente divulgados para atuar no sistema imunológico. Eles são microrganismos vivos com efeitos imunomoduladores que estimulam as citocinas Th1 e suprimem a resposta Th2 que vem sendo pesquisada para o tratamento de diversas doenças. Probióticos mais comumente usados são parte da microflora intestinal como lactobacilos, bifidobactérias e enterococos. Descrevemos um caso de resposta evidente ao uso de probióticos em uma menina com dermatite atópica grave, com grande alteração nos escores de gravidade da dermatite atópica (BSA/Scorad/FDLQI). A modulação da microbiota intestinal com probióticos pode oferecer uma maneira de prevenir ou tratar doenças alérgicas, incluindo a dermatite atópica.


Subject(s)
Humans , Female , Infant , Probiotics/therapeutic use , Dermatitis, Atopic/therapy , Skin/pathology , Cytokines , Th2 Cells , Th1 Cells , Dermatitis, Atopic/physiopathology , Dermatitis, Atopic/microbiology , Immune System/physiopathology , Lactobacillus/classification
5.
J Immunol Res ; 2017: 6935402, 2017.
Article in English | MEDLINE | ID: mdl-28265582

ABSTRACT

Atopic dermatitis (AD) is one of the most common skin diseases, whose incidence is increasing in industrialized countries. The epicutaneous application of a hapten, such as 2,4-dinitrochlorobenzene (DNCB), evokes an experimental murine AD-like reaction. Glycomacropeptide (GMP) is a dairy bioactive peptide derived from hydrolysis of κ-casein by chymosin action. It has anti-inflammatory, prebiotic, and immunomodulatory effects. The present study was aimed to investigate the effect of GMP administration on DNCB-induced AD in rats. The severity of inflammatory process, pruritus, production of cytokines, and total immunoglobulin E (IgE) content were measured, and the histopathological features were analyzed. GMP reduced the intensity of inflammatory process and edema of DNCB-induced dermatitis, with a significant decrease in eosinophils recruitment and mast cells hyperplasia. In addition GMP suppressed the serum levels of total IgE and IL-4, IL-5, and IL-13 expression in AD-lesions. Besides, the levels of IL-10 were significantly increased. Remarkably, GMP administration before AD-induction abolished pruritus in dermatitis-like reactions in the rats. Taken together, these results indicate that GMP has an inhibitory effect on AD by downregulating Th2 dominant immune response, suggesting GMP as a potential effective alternative therapy for the prevention and management of AD.


Subject(s)
Anti-Inflammatory Agents, Non-Steroidal/therapeutic use , Caseins/therapeutic use , Dermatitis, Atopic/drug therapy , Dermatitis, Atopic/immunology , Inflammation/drug therapy , Peptide Fragments/therapeutic use , Pruritus/drug therapy , Th2 Cells/immunology , Animals , Anti-Inflammatory Agents, Non-Steroidal/pharmacology , Dermatitis, Atopic/chemically induced , Dermatitis, Atopic/physiopathology , Dinitrochlorobenzene , Disease Models, Animal , Eosinophils , Immunoglobulin E/blood , Interleukin-10/blood , Interleukin-10/genetics , Interleukin-13/blood , Interleukin-13/genetics , Interleukin-4/blood , Interleukin-4/genetics , Interleukin-5/blood , Interleukin-5/genetics , Mast Cells , Rats , Skin/immunology , Skin/pathology , Th2 Cells/drug effects
6.
An Bras Dermatol ; 91(4): 472-8, 2016.
Article in English | MEDLINE | ID: mdl-27579743

ABSTRACT

Atopic dermatitis is a chronic inflammatory skin disease with a complex pathogenesis, where changes in skin barrier and imbalance of the immune system are relevant factors. The skin forms a mechanic and immune barrier, regulating water loss from the internal to the external environment, and protecting the individual from external aggressions, such as microorganisms, ultraviolet radiation and physical trauma. Main components of the skin barrier are located in the outer layers of the epidermis (such as filaggrin), the proteins that form the tight junction (TJ) and components of the innate immune system. Recent data involving skin barrier reveal new information regarding its structure and its role in the mechanic-immunological defense; atopic dermatitis (AD) is an example of a disease related to dysfunctions associated with this complex.


Subject(s)
Dermatitis, Atopic/immunology , Epidermis/immunology , Intermediate Filament Proteins/immunology , Dermatitis, Atopic/physiopathology , Epidermis/physiopathology , Filaggrin Proteins , Humans , Immunity, Innate , Intermediate Filament Proteins/analysis , Receptors, Pattern Recognition/analysis , Receptors, Pattern Recognition/immunology , Tight Junctions/immunology
7.
An Bras Dermatol ; 91(4): 479-88, 2016.
Article in English | MEDLINE | ID: mdl-27579744

ABSTRACT

Advances in knowledge of neurocellulars relations have provided new directions in the understanding and treatment of numerous conditions, including atopic dermatitis. It is known that emotional, physical, chemical or biological stimuli can generate more accentuated responses in atopic patients than in non-atopic individuals; however, the complex network of control covered by these influences, especially by neuropeptides and neurotrophins, and their genetic relations, still keep secrets to be revealed. Itching and airway hyperresponsiveness, the main aspects of atopy, are associated with disruption of the neurosensory network activity. Increased epidermal innervation and production of neurotrophins, neuropeptides, cytokines and proteases, in addition to their relations with the sensory receptors in an epidermis with poor lipid mantle, are the aspects currently covered for understanding atopic dermatitis.


Subject(s)
Dermatitis, Atopic/etiology , Dermatitis, Atopic/physiopathology , Hypersensitivity/physiopathology , Neuroimmunomodulation/physiology , Animals , Dermatitis, Atopic/immunology , Humans , Keratinocytes/physiology , Medical Illustration , Nerve Growth Factor/physiology
8.
An. bras. dermatol ; An. bras. dermatol;91(4): 472-478, July-Aug. 2016. tab, graf
Article in English | LILACS | ID: lil-792439

ABSTRACT

Abstract: Atopic dermatitis is a chronic inflammatory skin disease with a complex pathogenesis, where changes in skin barrier and imbalance of the immune system are relevant factors. The skin forms a mechanic and immune barrier, regulating water loss from the internal to the external environment, and protecting the individual from external aggressions, such as microorganisms, ultraviolet radiation and physical trauma. Main components of the skin barrier are located in the outer layers of the epidermis (such as filaggrin), the proteins that form the tight junction (TJ) and components of the innate immune system. Recent data involving skin barrier reveal new information regarding its structure and its role in the mechanic-immunological defense; atopic dermatitis (AD) is an example of a disease related to dysfunctions associated with this complex.


Subject(s)
Humans , Dermatitis, Atopic/immunology , Epidermis/immunology , Intermediate Filament Proteins/immunology , Tight Junctions/immunology , Dermatitis, Atopic/physiopathology , Epidermis/physiopathology , Receptors, Pattern Recognition/analysis , Receptors, Pattern Recognition/immunology , Immunity, Innate , Intermediate Filament Proteins/analysis
9.
An. bras. dermatol ; An. bras. dermatol;91(4): 479-488, July-Aug. 2016. graf
Article in English | LILACS | ID: lil-792452

ABSTRACT

Abstract: Advances in knowledge of neurocellulars relations have provided new directions in the understanding and treatment of numerous conditions, including atopic dermatitis. It is known that emotional, physical, chemical or biological stimuli can generate more accentuated responses in atopic patients than in non-atopic individuals; however, the complex network of control covered by these influences, especially by neuropeptides and neurotrophins, and their genetic relations, still keep secrets to be revealed. Itching and airway hyperresponsiveness, the main aspects of atopy, are associated with disruption of the neurosensory network activity. Increased epidermal innervation and production of neurotrophins, neuropeptides, cytokines and proteases, in addition to their relations with the sensory receptors in an epidermis with poor lipid mantle, are the aspects currently covered for understanding atopic dermatitis.


Subject(s)
Humans , Animals , Neuroimmunomodulation/physiology , Dermatitis, Atopic/etiology , Dermatitis, Atopic/physiopathology , Hypersensitivity/physiopathology , Keratinocytes/physiology , Nerve Growth Factor/physiology , Dermatitis, Atopic/immunology , Medical Illustration
10.
Arch Immunol Ther Exp (Warsz) ; 64(6): 435-442, 2016 Dec.
Article in English | MEDLINE | ID: mdl-27147107

ABSTRACT

Atopic dermatitis (AD), a chronic relapsing inflammatory disease of the skin, is an important public health concern affecting 10-20 % of children worldwide. The etiology and pathogenesis of AD involve the interplay of genetic and environmental factors, including abnormalities in skin integrity and a skewed immune system usually driven by a Th2 phenotype in childhood with a switch to Th1 in the chronic phase of disease. Children and adults with AD commonly have elevated IgE levels directed to multiple different antigens, including aeroallergens, food allergens, and microbial proteins. IgE targeting self-antigens from epidermal proteins have been detected in up to 91 % of patients, particularly in severe persistent AD. It has been suggested that the occurrence of autoreactivity develops in early childhood. However, it is not clear yet if autoreactive IgEs in patients with AD are pathogenic or just an epiphenomenon. The fact that these autoantibodies are associated with severity and are not present in other allergic or skin diseases favors the pathogenicity of IgE-mediated autoreactivity in AD. In this review, we evaluate the pathogenesis of AD and the emerging role of autoreactivity to various keratinocyte antigens involving both the humoral and cellular components of the immune system.


Subject(s)
Dermatitis, Atopic/immunology , Epidermis/immunology , Immunity, Cellular/immunology , Immunity, Humoral/immunology , Adolescent , Adult , Allergens/immunology , Autoantibodies/immunology , Autoantigens/immunology , Autoimmunity/immunology , Child , Dermatitis, Atopic/physiopathology , Food Hypersensitivity , Humans , Immunoglobulin E/immunology , Phenotype , Skin/immunology , Th1 Cells/cytology , Th2 Cells/cytology , Young Adult
11.
São Paulo; s.n; 2015. [97] p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: biblio-870834

ABSTRACT

INTRODUÇÃO: A dermatite atópica (DA) é uma doença cutânea inflamatória, acompanhada por prurido intenso e xerose cutânea. A etiopatogenia da DA é multifatorial, envolvendo fatores genéticos, ambientais e imunológicos, dentre outros. OBJETIVOS: Avaliar a influência das enterotoxinas A e B do Staphylococcus aureus (SEA e SEB) na resposta mediada por células Th17 e Th22 nos indivíduos adultos com DA. MÉTODOS: Foram selecionados 38 pacientes adultos com DA e um grupo controle com 40 indivíduos adultos, pareados por idade e gênero Os métodos utilizados foram: 1) ELISA: dosagem dos níveis séricos de IL-6, IL-17, IL-22 e IL-12p40/IL-23 e em sobrenadantes de culturas de células mononucleares do sangue periférico (PBMC) estimuladas com SEA e SEB; 2) Imuno-histoquímica: análise da expressão de IL-17 em fragmentos de pele; 3) Citometria de fluxo: a) análise das citocinas circulantes em amostras de soro: IL-2, IL-4, IL-5, IL-6, IL-10, TNF, IL-17A e IFN-y b)avaliação das células T CD4+ mono e polifuncionais secretoras de IL-17, IL-22, TNF, IFN-y, MIP-1beta, e expressão do marcador de ativação celular CD38; c) células Th22 e Tc22 estimuladas com SEA e SEB. RESULTADOS: 1) Através do ELISA, a secreção de IL-22 sérica e em PBMC induzidas por SEA e SEB foi significativamente mais elevada, quando comparada ao grupo controle; 2) houve aumento na expressão de IL-17 em amostras de pele de doentes de DA através da imuno-histoquímica; 3) Através da citometria de fluxo, foram detectados: a) níveis séricos de IL-2, 5, 6, 10, 17A e IFN-y elevados no grupo com DA em relação aos controles; houve diferença significativa nos níveis circulantes de IL-17A nos pacientes com DA moderada e grave; b) na avaliação monofuncional das células T CD4+ sob estímulo de SEA/SEB, houve redução da expressão das citocinas IFN-y, IL-17A, IL-22 ou TNF na DA, quando comparadas ao grupo controle; na análise polifuncional das células T CD4+/CD8+, ocorreu redução da resposta na DA em relação aos...


BACKGROUND: Atopic dermatitis (AD) is an inflammatory skin disease with intense itching and xerosis. AD pathogenesis is multifactorial, involving genetic, environmental, and immunological factors, among others. OBJECTIVES: To evaluate the influence of enterotoxins A and B from Staphylococcus aureus (SEA and SEB) in Th17 and Th22 cell response in adults with AD. METHODS: We evaluated 38 adult patients with AD, and a control group of 40 adults, age and gender matched. Assays: 1) ELISA: evaluation of IL-6, IL-17, IL-12p40/IL-23 and IL-22 serum levels and in supernatants of mononuclear cell cultures from peripheral blood (PBMC), stimulated with SEA/SEB; 2) Immunohistochemistry: analysis of IL-17 expression in skin specimens; 3) Flow cytometry: a) analysis of circulating cytokines in serum samples: IL-2, IL-4, IL-5, IL-6, IL-10, TNF, IL-17A and IFN-y b) evaluation of mono and polyfunctional TCD4+ cells that secrete IL-17, IL-22, TNF, IFN-y, MIP-1beta, and expression of the activation marker CD38; c) analysis of Tc22 and Th22 cells stimulated with SEA and SEB. RESULTS: 1) Secretion of IL-22 in the serum and from supernatants of cell cultures from PBMC, stimulated with SEA and SEB were higher in AD patients, when compared to the control group by ELISA; 2) there was an increase of IL-17 expression in skin samples by immunohistochemistry; 3) Flow cytometry showed: a) elevated serum levels of IL-2, 5, 6, 10, 17A and IFN-y in AD, when compared to controls; there was a significant difference in circulating levels of IL-17A in patients with moderate and severe disease; b) monofunctional evaluation of T CD4+ cells under SEA/SEB stimuli showed reduced expression of IFN-y, IL-17A, IL-22 or TNF cytokines in AD, compared to controls; the same was observed for polyfunctional CD4+/CD8+ T cells analysis, exhibiting a diminished response in AD. In atopic patients under basal conditions, there was an augmented CD38- dependent response and reduced pattern to SEA/SEB in the...


Subject(s)
Humans , Male , Female , Young Adult , Adult , Adult , Dermatitis, Atopic/physiopathology , Dermatitis, Atopic/immunology , Enterotoxins , Interleukins , Staphylococcus aureus
12.
An. bras. dermatol ; An. bras. dermatol;88(6): 945-953, Nov-Dec/2013. tab
Article in English | LILACS | ID: lil-698993

ABSTRACT

Patients with atopic dermatitis have genetically determined risk factors that affect the barrier function of the skin and immune responses that interact with environmental factors. Clinically, this results in an intensely pruriginous and inflamed skin that allows the penetration of irritants and allergens and predisposes patients to colonization and infection by microorganisms. Among the various etiological factors responsible for the increased prevalence of atopic diseases over the past few decades, the role of vitamin D has been emphasized. As the pathogenesis of AD involves a complex interplay of epidermal barrier dysfunction and dysregulated immune response, and vitamin D is involved in both processes, it is reasonable to expect that vitamin D's status could be associated with atopic dermatitis' risk or severity. Such association is suggested by epidemiological and experimental data. In this review, we will discuss the evidence for and against this controversial relationship, emphasizing the possible etiopathogenic mechanisms involved.


Pacientes com dermatite atópica têm fatores de risco geneticamente determinados que afetam a função de barreira da pele e as respostas imunes, as quais interagem com fatores ambientais. Clinicamente, isso resulta em uma pele intensamente pruriginosa, inflamada, que permite a penetração de irritantes e alérgenos e predispõe os pacientes à colonização e à infecção por micro-organismos. Dentre os diversos fatores etiológicos responsáveis pelo aumento da prevalência de doenças atópicas nas últimas décadas, o papel da vitamina D tem ganhado destaque. Uma vez que a patogênese da dermatite envolve uma interação complexa da disfunção da barreira epidérmica e desregulação da resposta imune - e a vitamina D está envolvida em ambos os processos-, é razoável esperar que a vitamina D esteja associada ao risco ou à gravidade da dermatite atópica. Tal associação é sugerida por dados epidemiológicos e experimentais. Nessa revisão, serão abordadas as evidências favoráveis e contrárias a essa polêmica relação, enfatizando os possíveis mecanismos etiopatogênicos envolvidos.


Subject(s)
Humans , Dermatitis, Atopic/drug therapy , Vitamin D/therapeutic use , Vitamins/therapeutic use , Dermatitis, Atopic/etiology , Dermatitis, Atopic/physiopathology , Risk Factors , Skin Physiological Phenomena , Skin/physiopathology , Vitamin D Deficiency/complications , Vitamin D/pharmacology , Vitamins/pharmacology
13.
Clinics (Sao Paulo) ; 68(7): 934-9, 2013 Jul.
Article in English | MEDLINE | ID: mdl-23917656

ABSTRACT

OBJECTIVE: To investigate parental smoking patterns and their association with wheezing in children. METHODS: We performed a case-control study that included 105 children between 6 and 23 months of age who were divided into two groups: cases (children with 3 previous episodes of wheezing) and controls (healthy children without wheezing). The children's exposure to cigarette smoking was estimated using a questionnaire completed by the mothers and by the children's urinary cotinine levels. RESULTS: Based on both the questionnaire results and cotinine levels, exposure to cigarette smoking was higher in the households of cases in which the incidence of maternal smoking was significantly higher than that of paternal smoking. Children in this group were more affected by maternal smoking and by the total number of cigarettes smoked inside the house. Additionally, the questionnaire results indicated that the risk of wheezing was dose dependent. The presence of allergic components, such as atopic dermatitis and siblings with allergic rhinitis and asthma, greatly increased the odds ratio when wheezing was associated with cotinine levels. CONCLUSION: Children exposed to tobacco smoke have an increased risk of developing wheezing syndrome. This risk increases in association with the number of cigarettes smoked inside the house and the presence of other allergic components in the family.


Subject(s)
Parents , Respiratory Sounds/etiology , Smoking/adverse effects , Tobacco Smoke Pollution/adverse effects , Asthma/physiopathology , Case-Control Studies , Cotinine/urine , Dermatitis, Atopic/physiopathology , Environmental Exposure/adverse effects , Female , Humans , Infant , Male , Rhinitis, Allergic , Rhinitis, Allergic, Perennial/physiopathology , Risk Factors , Surveys and Questionnaires , Time Factors , Tobacco Smoke Pollution/statistics & numerical data
14.
Clinics ; Clinics;68(7): 934-939, jul. 2013. tab
Article in English | LILACS | ID: lil-680704

ABSTRACT

OBJECTIVE: To investigate parental smoking patterns and their association with wheezing in children. METHODS: We performed a case-control study that included 105 children between 6 and 23 months of age who were divided into two groups: cases (children with 3 previous episodes of wheezing) and controls (healthy children without wheezing). The children's exposure to cigarette smoking was estimated using a questionnaire completed by the mothers and by the children's urinary cotinine levels. RESULTS: Based on both the questionnaire results and cotinine levels, exposure to cigarette smoking was higher in the households of cases in which the incidence of maternal smoking was significantly higher than that of paternal smoking. Children in this group were more affected by maternal smoking and by the total number of cigarettes smoked inside the house. Additionally, the questionnaire results indicated that the risk of wheezing was dose dependent. The presence of allergic components, such as atopic dermatitis and siblings with allergic rhinitis and asthma, greatly increased the odds ratio when wheezing was associated with cotinine levels. CONCLUSION: Children exposed to tobacco smoke have an increased risk of developing wheezing syndrome. This risk increases in association with the number of cigarettes smoked inside the house and the presence of other allergic components in the family. .


Subject(s)
Female , Humans , Infant , Male , Parents , Respiratory Sounds/etiology , Smoking/adverse effects , Tobacco Smoke Pollution/adverse effects , Asthma/physiopathology , Case-Control Studies , Cotinine/urine , Dermatitis, Atopic/physiopathology , Environmental Exposure/adverse effects , Risk Factors , Rhinitis, Allergic, Perennial/physiopathology , Surveys and Questionnaires , Time Factors , Tobacco Smoke Pollution/statistics & numerical data
15.
An Bras Dermatol ; 88(6): 945-53, 2013.
Article in English | MEDLINE | ID: mdl-24474104

ABSTRACT

Patients with atopic dermatitis have genetically determined risk factors that affect the barrier function of the skin and immune responses that interact with environmental factors. Clinically, this results in an intensely pruriginous and inflamed skin that allows the penetration of irritants and allergens and predisposes patients to colonization and infection by microorganisms. Among the various etiological factors responsible for the increased prevalence of atopic diseases over the past few decades, the role of vitamin D has been emphasized. As the pathogenesis of AD involves a complex interplay of epidermal barrier dysfunction and dysregulated immune response, and vitamin D is involved in both processes, it is reasonable to expect that vitamin D's status could be associated with atopic dermatitis' risk or severity. Such association is suggested by epidemiological and experimental data. In this review, we will discuss the evidence for and against this controversial relationship, emphasizing the possible etiopathogenic mechanisms involved.


Subject(s)
Dermatitis, Atopic/drug therapy , Vitamin D/therapeutic use , Vitamins/therapeutic use , Dermatitis, Atopic/etiology , Dermatitis, Atopic/physiopathology , Humans , Risk Factors , Skin/physiopathology , Skin Physiological Phenomena , Vitamin D/pharmacology , Vitamin D Deficiency/complications , Vitamins/pharmacology
16.
Int J Dermatol ; 51(6): 672-6, 2012 Jun.
Article in English | MEDLINE | ID: mdl-22607284

ABSTRACT

BACKGROUND: Atopic dermatitis (AD) is a chronic dermatosis, predominant in childhood, characterized by pruritus and eczematous-type lesions with xerosis as the prominent clinical sign. OBJECTIVES: To analyze the correlation between biophysical measurements of skin barrier function and other assessment criteria of clinical severity according to Rajka and Langeland's criteria. METHODS: Biophysical measurements [transepidermal water loss (TEWL) and corneometry] were obtained from 120 patients with the diagnosis of AD. Serum levels of IgE were also evaluated. RESULTS: A significant correlation between corneometry, TEWL, and clinical severity of AD was found. Data showed an inverse correlation between corneometry, TEWL, and AD severity, and a significant difference (P < 0.001) between mean of corneometry and TEWL and AD severity (mild, moderate, and severe). As for IgE levels, corneometry had significant negative correlation, in contrast with TEWL, which showed a significant positive correlation (P < 0.001). CONCLUSION: Biophysical measurements of skin barrier in non-lesional skin of AD may work as an evaluation factor for AD severity.


Subject(s)
Dermatitis, Atopic/physiopathology , Severity of Illness Index , Adolescent , Child , Child, Preschool , Epidermis/metabolism , Female , Humans , Immunoglobulin E/blood , Infant , Infant, Newborn , Male , Water Loss, Insensible/physiology
17.
J Investig Allergol Clin Immunol ; 20(4): 311-23, 2010.
Article in English | MEDLINE | ID: mdl-20815309

ABSTRACT

BACKGROUND: The aim of the International Study of Asthma and Allergies in Childhood (ISAAC) was to evaluate the prevalence of symptoms of eczema among children living in different parts of Latin America. Data were from centers that participated in ISAAC Phase 3. METHODS: This was a cross-sectional questionnaire survey of 93,851 schoolchildren (6 to 7 years old) from 35 centers in 14 Latin American countries and 165,917 adolescents (13 to 14 years old) from 56 centers in 17 Latin American countries. RESULTS: The mean prevalence of current flexural eczema in schoolchildren was 11.3%, ranging from 3.2% in Ciudad Victoria (Mexico) to 25.0% in Barranquilla (Colombia). For adolescents, the prevalence varied from 3.4% in Santo André (Brazil) to 30.2% in Barranquilla (mean prevalence, 10.6%). The mean prevalence of current symptoms of severe eczema among schoolchildren was 1.5%, ranging from 0.3% in Ciudad Victoria, Toluca, and Cuernavaca (Mexico) to 4.9% in La Habana (Cuba). For adolescents, the mean prevalence was 1.4%, ranging from 0.1% in Mexicali Valley (Mexico) to 4.2% in Santa Cruz (Bolivia). These prevalence values are among the highest observed during ISAAC Phase 3. In general, the prevalence of current symptoms of eczema was higher among the Spanish-speaking centers for both schoolchildren and adolescents. CONCLUSION: Environmental risk factors must be evaluated in order to identify potential causes for the differences observed, even in centers from the same country.


Subject(s)
Dermatitis, Atopic/epidemiology , Dermatitis, Atopic/physiopathology , Hispanic or Latino , Adolescent , Brazil/ethnology , Child , Cross-Sectional Studies , Exanthema , Female , Humans , International Cooperation , Latin America , Portugal/ethnology , Prevalence , Risk Factors , Sleep Wake Disorders
18.
Ann Allergy Asthma Immunol ; 105(1): 39-42, 2010 Jul.
Article in English | MEDLINE | ID: mdl-20642202

ABSTRACT

BACKGROUND: Low serum levels of mannose-binding lectin (MBL) are determined mainly by variant alleles of the MBL2 gene and it has been suggested that MBL may play a role in the susceptibility to atopic dermatitis (AD). OBJECTIVE: The aim was to investigate the difference of the frequency of MBL2 variant alleles in AD patients and in a group of individuals without AD, and associate the MBL2 alleles with AD severity. METHODS: MBL2 variant allele's frequency was investigated in 131 children with AD and 165 healthy children/adolescents matched by convenience. The severity of disease was graded according to the SCORing Atopic Dermatitis (SCORAD) index. The first exon variants were called "O" and the wild type "A". The variants in the promoter were H/L at -550 and X/Y at -221, determined by Real Time PCR. RESULTS: Children with AD had higher frequency of allele O and the genotypes related to low or deficient levels of MBL, when compared to the healthy group (p = 0.0012 and p < 0.001, respectively), but not with AD severity. CONCLUSION: Low or deficient MBL serum levels determined genetically may contribute to the predisposition for AD, but not for disease severity.


Subject(s)
Alleles , Dermatitis, Atopic/genetics , Genotype , Mannose-Binding Lectin/genetics , Adolescent , Child , Child, Preschool , Dermatitis, Atopic/diagnosis , Dermatitis, Atopic/physiopathology , Disease Progression , Female , Genetic Predisposition to Disease , Humans , Infant , Male , Mannose-Binding Lectin/biosynthesis , Mannose-Binding Lectin/blood , Polymorphism, Genetic , Promoter Regions, Genetic
20.
Pediatr. mod ; 44(5): 173-185, set.-out. 2008. tab
Article in Portuguese | LILACS | ID: lil-504620

ABSTRACT

A autora procede a uma revisão do tema Dermatite atópica em Pediatria, ressaltando sua importância e freqüência na prática de consultório, descrevendo o quadro clínico e o roteiro diagnóstico, a fisiopatologia da moléstia, as respostas imunes adaptativas, inter-relações entre infecção e dermatite atópica e, finalmente, a terapêutica, compreendendo identificação e afastamento dos fatores desencadeantes ou agravantes, hidratação da pele, controle da inflamação e do prurido e outras formas de tratamento, eventualmente indicadas. O trabalho se acompanha de extensa relação de referências bibliográficas.


Subject(s)
Humans , Male , Female , Child , Adolescent , Skin Diseases , Dermatitis, Atopic/diagnosis , Dermatitis, Atopic/etiology , Dermatitis, Atopic/physiopathology , Dermatitis, Atopic/pathology , Dermatitis, Atopic/therapy , Child Health
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