Detecção e genotipagem de papilomavírus humano em lesões de queratoacantoma solitário de pacientes imunocompetentes
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Data
2007-02-01
Autores
Vela, Rodrigo Alessandro R. [UNESP]
Polettini, Jossimara [UNESP]
Marques, Mariângela Esther Alencar [UNESP]
Stolf, Hamilton Ometto [UNESP]
Candeias, João Manuel Grisi [UNESP]
Silva, Marcia Guimarães da [UNESP]
Costa, Ana Laura Bastos da [UNESP]
Matsuo, Cristiane Yuri [UNESP]
Miot, Hélio Amante [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Dermatologia
Resumo
FUNDAMENTOS: O queratoacantoma é neoplasia cutânea benigna que incide preferencialmente em indivíduos de pele clara, faixa etária elevada, acometendo áreas fotoexpostas. Além da exposição à radiação ultravioleta, sua etiologia é relacionada a diversos carcinógenos, entre eles a infecção pelo papilomavírus humano (HPV). OBJETIVOS: Avaliar a prevalência do DNA do HPV, bem como seus genótipos, em lesões de queratoacantoma solitário de pacientes imunocompetentes. MÉTODOS: Foram estudados queratoacantomas de pacientes sem evidências de imunocomprometimento, excisados entre 1996 e 2000 em hospital universitário. Realizaram-se cortes histológicos, desparafinização e extração de DNA desses fragmentos. Os espécimes positivos para DNA de HPV foram submetidos ao seqüenciamento gênico, para determinação do genótipo. RESULTADOS: Foram estudados 58 pacientes com idade média de 64,5±13,8 anos. A proporção entre os sexos foi semelhante, e as localizações mais comuns foram os membros superiores (50%) e a face (27,6%). Detectou-se DNA de HPV em 48 (82,7%) fragmentos de queratoacantomas, sendo os genótipos 6, 11 e 16 os prevalentes. CONCLUSÕES: A alta prevalência do achado de DNA de HPV em lesões de queratoacantoma solitário pode sugerir a participação viral em sua oncogênese.
BACKGROUND - Keratoacanthoma is a benign cutaneous neoplasm that preferentially affects fair skin individuals of older age groups and involves sun-exposed areas. Apart from ultraviolet radiation exposure, its etiology is related to several carcinogens, including human papillomavirus (HPV) infection. OBJECTIVES: To assess the prevalence of HPV DNA and its genotypes in solitary keratoacanthoma lesions of immunocompetent patients. Methods: Keratoacanthoma lesions of patients with no evidence of immunological involvement, excised from 1996 to 2000, at a university hospital, were assessed. Histological aspects, deparafinization and DNA extraction of these lesions were evaluated. The specimens positive for HPV DNA were submitted to gene sequencing to determine the genotype. RESULTS: Fifty-eight patients were studied, mean age of 64.5±13.8 years. Both sexes were similarly affected, and the most common sites were upper limbs (50%) and face (27.6%). HPV DNA was detected in 48 (82.7%) keratoacanthoma fragments, and the genotypes 6, 11 and 16 were the most prevalent. CONCLUSIONS: The high prevalence of HPV DNA in solitary keratoacanthoma lesions may suggest viral participation in its oncogenesis.
BACKGROUND - Keratoacanthoma is a benign cutaneous neoplasm that preferentially affects fair skin individuals of older age groups and involves sun-exposed areas. Apart from ultraviolet radiation exposure, its etiology is related to several carcinogens, including human papillomavirus (HPV) infection. OBJECTIVES: To assess the prevalence of HPV DNA and its genotypes in solitary keratoacanthoma lesions of immunocompetent patients. Methods: Keratoacanthoma lesions of patients with no evidence of immunological involvement, excised from 1996 to 2000, at a university hospital, were assessed. Histological aspects, deparafinization and DNA extraction of these lesions were evaluated. The specimens positive for HPV DNA were submitted to gene sequencing to determine the genotype. RESULTS: Fifty-eight patients were studied, mean age of 64.5±13.8 years. Both sexes were similarly affected, and the most common sites were upper limbs (50%) and face (27.6%). HPV DNA was detected in 48 (82.7%) keratoacanthoma fragments, and the genotypes 6, 11 and 16 were the most prevalent. CONCLUSIONS: The high prevalence of HPV DNA in solitary keratoacanthoma lesions may suggest viral participation in its oncogenesis.
Descrição
Palavras-chave
Análise de seqüência com séries de oligonucleotídeos, Ceratoacantoma, Papilomavírus, Reação em cadeia da polimerase, Keratoacanthoma, Papillomavirus, Polymerase chain reaction, Sequence analysis with oligonucleotid series
Como citar
Anais Brasileiros de Dermatologia. Sociedade Brasileira de Dermatologia, v. 82, n. 1, p. 35-40, 2007.