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Precipitating factors of porphyria cutanea tarda in Brazil with emphasis on hemochromatosis gene (HFE) mutations. Study of 60 patients / Fatores precipitantes na porfiria cutanea tardia no Brasil com enfase nas mutacoes do gene (HFE) da hemocromatose. Estudo de 60 casos
Vieira, Fatima Mendonca Jorge; Nakhle, Maria Cristina; Abrantes-Lemos, Clarice Pires; Cancado, Eduardo Luiz Rachid; Reis, Vitor Manoel Silva dos.
  • Vieira, Fatima Mendonca Jorge; s.af
  • Nakhle, Maria Cristina; s.af
  • Abrantes-Lemos, Clarice Pires; s.af
  • Cancado, Eduardo Luiz Rachid; s.af
  • Reis, Vitor Manoel Silva dos; s.af
An. bras. dermatol ; 88(4): 530-540, ago. 2013. tab, graf
Article in English | LILACS | ID: lil-686529
ABSTRACT
BACKGROUND: Porphyria cutanea tarda is the most common form of porphyria, characterized by the decreased activity of the uroporphyrinogen decarboxylase enzyme. Several reports associated HFE gene mutations of hereditary hemochromatosis with porphyria cutanea tarda worldwide, although up to date only one study has been conducted in Brazil. OBJECTIVES: Investigation of porphyria cutanea tarda association with C282Y and H63D mutations in the HFE gene. Identification of precipitating factors (hepatitis C, HIV, alcoholism and estrogen) and their link with HFE mutations. METHODS: An ambispective study of 60 patients with PCT was conducted during the period from 2003 to 2012. Serological tests for hepatitis C and HIV were performed and histories of alcohol abuse and estrogen intake were investigated. HFE mutations were identified with real-time PCR. RESULTS: Porphyria cutanea tarda predominated in males and alcohol abuse was the main precipitating factor. Estrogen intake was the sole precipitating factor present in 25% of female patients. Hepatitis C was present in 41.7%. All HIV-positive patients (15.3%) had a history of alcohol abuse. Allele frequency for HFE mutations, i.e., C282Y (p = 0.0001) and H63D (p = 0.0004), were significantly higher in porphyria cutanea tarda patients, compared to control group. HFE mutations had no association with the other precipitating factors. CONCLUSIONS: Alcohol abuse, hepatitis C and ...
RESUMO
FUNDAMENTOS: A porfiria cutânea tardia é a forma mais comum das porfirias e caracteriza-se pela diminuição da atividade da enzima uroporfirinogênio descarboxilase. Há vários relatos da associação das mutações do gene HFE da hemocromatose hereditária com porfiria cutânea tardia no mundo, mas até hoje apenas um estudo foi realizado no Brasil. OBJETIVOS: Estudar a associação da porfiria cutânea tardia com as mutações C282Y e H63D do gene HFE. Identificar os fatores precipitantes (hepatite C, HIV, etilismo e estrógeno) e sua relação com as mutações HFE. MÉTODOS: Estudo ambispectivo de 60 pacientes com porfiria cutânea tardia no período de 2003 a 2012. Investigou-se as sorologias para hepatite C, anti-HIV, histórico de etilismo e ingestão de estrógenos. As mutações HFE foram identificadas com PCR em tempo real. RESULTADOS: A porfiria cutânea tardia predominou no sexo masculino e o etilismo foi o principal fator precipitante. A ingestão de estrógenos foi o único fator precipitante em 25% das mulheres. A hepatite C estava presente em 41,7%. Todos os pacientes com HIV (15,3%) apresentavam etilismo associado. A frequência dos alelos C282Y (p=0,0001) e H63D (p=0,0004) do gene HFE foi significativamente mais elevada nos pacientes com porfiria cutânea tardia em relação à população controle. ...
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Full text: Available Index: LILACS (Americas) Main subject: Porphyria Cutanea Tarda / Hemochromatosis / Mutation Type of study: Etiology study / Prognostic study / Risk factors Limits: Adult / Female / Humans / Male Country/Region as subject: South America / Brazil Language: English Journal: An. bras. dermatol Journal subject: Dermatology Year: 2013 Type: Article / Project document

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Full text: Available Index: LILACS (Americas) Main subject: Porphyria Cutanea Tarda / Hemochromatosis / Mutation Type of study: Etiology study / Prognostic study / Risk factors Limits: Adult / Female / Humans / Male Country/Region as subject: South America / Brazil Language: English Journal: An. bras. dermatol Journal subject: Dermatology Year: 2013 Type: Article / Project document