Chlamydia trachomatis and human papillomavirus coinfection: association with p16INK4a and Ki67 expression in biopsies of patients with pre-neoplastic and neoplastic lesions
Braz. j. infect. dis
;
15(2): 126-131, Mar.-Apr. 2011. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-582414
ABSTRACT
The objective of this study was to identify the frequency of coinfection by human papillomavirus (HPV) and Chlamydia trachomatis (CT) in cervical lesions and relate it with immunohistochemical expression of p16INK4a and Ki67, both oncogenicity markers. A cross-sectional study with 86 women from primary care units in southern Brazil was conducted. Cervical swabs were collected for HPV-DNA and CT-DNA detection, through the polymerase chain reaction technique (PCR). The immunohistochemical analysis was performed on biopsy cervical tissue material to identify the expression of p16INK4a and Ki67 cell cycle markers. About 83 percent were positive for HPV-DNA and 19 percent had coinfection with CT-DNA. Among coinfected women, 56 percent expressed p16INK4a. There was a statistically significant association between the histological grade of the lesion and Ki67 expression. All high-grade lesions, 50 percent of low-grade lesions and 31 percent of negative biopsies expressed Ki67 (p = 0.004). A total of 37 percent of coinfected women expressed both markers. In conclusion, although more than half of the coinfected patients have expressed p16INK4a and more than one third have expressed both markers, these results suggest no association between those variables. However, other studies involving larger samples are necessary to corroborate such findings.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Papillomaviridae
/
Infecções por Chlamydia
/
Neoplasias do Colo do Útero
/
Chlamydia trachomatis
/
Infecções por Papillomavirus
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
/
Estudo de prevalência
/
Estudo prognóstico
/
Fatores de risco
Limite:
Adulto
/
Feminino
/
Humanos
Idioma:
Inglês
Revista:
Braz. j. infect. dis
Assunto da revista:
Doenças Transmissíveis
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Hospital de Clínicas de Porto Alegre/BR
/
UFRGS/BR
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