Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
1.
Rev. Soc. Bras. Med. Trop ; 45(1): 3-8, Jan.-Feb. 2012. ilus, tab
Article in English | LILACS | ID: lil-614900

ABSTRACT

INTRODUCTION: Some human papillomavirus (HPV) types are involved in malignant processes in the cervical epithelium, with 99 percent of cases attributed to oncogenic HPV infection. This study aimed to detect S100, CD68, and major histocompatibility complex class II (MHC-II) molecules in cervical uterine epithelial samples in patients with high- and low-grade lesions induced by HPV. METHODS: Fifty-eight samples from patients who were confirmed positive or negative for high-risk oncogenic HPV DNA, had histopathological diagnosis of cervical intraepithelial neoplasia (CIN) of grades I, II, or III, or were negative for intraepithelial lesion or malignancy were subjected to immunohistochemistry reaction to S100 protein, CD68, and MHC-II (HLA-DR alpha chain). RESULTS: The presence of MHC-II predominated in samples exhibiting histopathological alterations (p < 0.05). S100 detection was more numerous in carcinoma samples (CIN III) (75 percent). Presence of this protein correlated significantly (p < 0.05) with histopathological findings and viral load. CONCLUSIONS: A small expression of CD68 was observed, which may be explained by the observation in our study having been made on random microscopic fields and not on specific areas. The findings, such as the presence of S100 protein and MHC-II expression in samples with histological alterations, could suggest that the immune system fails to control HPV replication at the early stages of infection. Further studies with larger prospective data are necessary to confirm this result.


INTRODUÇÃO: Alguns tipos de papilomavirus humano (HPV) estão envolvidos em processos malignos no epitélio cervical, com 99 por cento dos casos atribuídos à infecção por HPV oncogênico. O objetivo deste estudo foi detectar a proteína S100, CD68 e moléculas de MHC-II (complexo principal de histocompatibilidade classe II) em amostras de epitélio cervical uterino, de pacientes com lesões de alto e baixo grau induzidas pelo HPV. MÉTODOS: Cinquenta e oito amostras de pacientes positivos ou negativos, confirmados, para DNA de HPV de alto ou baixo risco oncogênico, e que tiveram diagnóstico histopatológico de neoplasia intraepithelial cervical (NIC) de graus I, II ou III ou foram negativas para lesão intraepithelial e malignidade (NILM), foram submetidas à reação de imunohistoquímica (IHQ) para proteína S100, CD68 e MHC-II (HLA-DR cadeia alfa). RESULTADOS: A presença da molécula MHC-II predominou em amostras exibindo alterações histopatológicas (p < 0,05). A detecção de S100+ foi mais numerosa em amostras com carcinoma (NIC III) (75 por cento). A presença dessa proteína correlacionou-se significantemente (p < 0,05) com achados histopatológicos e a carga viral. CONCLUSÕES: Pequena expressão CD68+ foi observada, uma possível explicação seria que em nosso estudo as observações foram feitas em campo microscópicos aleatórios e não em áreas específicas. Os achados como a presença de S100 e a expressão de MHC-II, em amostras com alterações histológicas, podem sugerir que o sistema imune falha em controlar a replicação do HPV nas fases iniciais da infecção. Maiores estudos, com mais dados prospectivos, são necessários para confirmar esses resultados.


Subject(s)
Adolescent , Adult , Aged , Female , Humans , Middle Aged , Young Adult , Antigens, CD/analysis , Antigens, Differentiation, Myelomonocytic/analysis , Uterine Cervical Dysplasia/immunology , Histocompatibility Antigens Class II/analysis , Papillomavirus Infections/immunology , /analysis , Biomarkers/analysis , Uterine Cervical Dysplasia/pathology , Uterine Cervical Dysplasia/virology , DNA, Viral/analysis , Immunohistochemistry , Neoplasm Staging , Papillomavirus Infections/complications , Papillomavirus Infections/pathology , Viral Load
2.
Rev. Soc. Bras. Med. Trop ; 43(4): 425-429, jul.-ago. 2010. ilus, tab
Article in Portuguese | LILACS | ID: lil-556010

ABSTRACT

INTRODUÇÃO: A resposta imune pode ser um elemento chave para a progressão ou remissão da infecção pelo papilomavírus humano (HPV) no estroma da cérvice uterina. Este estudo objetivou quantificar no estroma cervical a presença de linfócitos T CD4, CD8 e células NK, por imunohistoquímica, em lesões de alto e baixo grau em pacientes infectadas por HPV MÉTODOS: Utilizou-se 56 amostras de biópsia da estroma cervical, sendo 43 amostras positivas para DNA de HPV de alto risco oncogênico e com diagnóstico histopatológico de neoplasia intraepitelial cervical (NIC) de alto e baixo grau, ou negativa para lesão intraepitelial e malignidade (NILM), e 13 amostras de pacientes negativas para DNA de HPV com diagnóstico histopatológico NILM RESULTADOS: Maior quantidade de linfócitos T CD4 foi observada em amostras NIC II/III, carcinoma e NILM (p=0,04) e naquelas cuja carga viral esteve entre 10 e 1,000 RLU/PCB. O predomínio de linfócitos T CD8 ocorreu em maior proporção nas amostras NIC II/III (p=0,02) e em amostras com carga viral entre 100 e 1.000 RLU/PCB. As células NK prevaleceram nas amostras com lesões de baixo grau e com baixa carga viral CONCLUSÕES: Este estudo comprovou que nas fases iniciais da infecção, onde não há ainda alterações celulares de alto grau, não temos a presença de células que possam desencadear a fase efetora da resposta imune.


INTRODUCTION: Immune response might be a key element regarding the progression or regression of human papillomavirus (HPV) infection in the stroma of the uterine cervix. This study aimed to quantify the presence of CD4 and CD8 T lymphocytes and NK cells in the cervical stroma, by means of immunohistochemistry, in high and low grade lesions in patients infected by HPV METHODS: Fifty-six biopsy samples from the uterine cervix were used. Forty-three samples were positive for oncogenic high-risk HPV DNA and had a histopathological diagnosis of high and low-grade cervical intraepithelial neoplasia (CIN) or negative for intraepithelial lesion and malignancy (NILM); while the other 13 samples were negative for HPV DNA with a histopathological diagnosis of NILM RESULTS: Higher quantities of CD4 T lymphocytes were observed in CIN II/III, carcinoma and NILM samples (p = 0.04) and in those in which the viral load was between 10 and 1.000 RLU/PCB. CD8 T lymphocytes were predominant in CIN II/III samples (p = 0.02) and also in samples with viral loads between 100 and 1,000 RLU/PCB. NK cells predominated in samples with low-grade lesions and low viral load CONCLUSIONS: This study proved that in the initial stages of the infection, in which no high-grade cell abnormalities have yet occurred, no cells that might trigger the effector phase of the immune response.


Subject(s)
Adolescent , Adult , Female , Humans , Middle Aged , Young Adult , /cytology , /cytology , Cervix Uteri/virology , Killer Cells, Natural/cytology , Papillomavirus Infections/immunology , /immunology , /immunology , Uterine Cervical Dysplasia/immunology , Uterine Cervical Dysplasia/pathology , Cervix Uteri/pathology , Immunohistochemistry , Killer Cells, Natural/immunology , Papillomavirus Infections/pathology , Severity of Illness Index , Stromal Cells/virology , Uterine Cervical Dysplasia/immunology , Uterine Cervical Dysplasia/pathology , Viral Load , Young Adult
3.
J. bras. patol. med. lab ; 42(6): 449-453, dez. 2006. tab
Article in English | LILACS | ID: lil-446500

ABSTRACT

OBJECTIVE: To compare the relation between HPV viral load by hybrid capture II test (HCII) and cytological findings. METHODS: Three hundred sixty-two reagent samples to HPV DNA by HCII had their viral loads classified in four categories and correlated to cytological results. RESULTS: Twenty-two samples (6.1 percent) were reagent only to low-risk oncogenic types (group A) and 340 (93.9 percent) were reagent to high-risk oncogenic types (group B). The correlation between viral load for the reagent samples to group A and cytological results showed low-grade squamous intraepithelial lesion (LSIL) predominance (50 percent). Most of this group samples had viral load between 1 to <10RLU/PCA. Of the patients that were reagent to group B 52.1 percent had LSIL cytology and 38.2 percent were negative to intraepithelial lesion and malignancy (NILM) cytology. The patients with LSIL had viral load well distributed with a slight predominance of 100 to < 1,000RLU/PCB category. The samples had viral load between 1 to <10RLU/PCB showed NILM cytology predominance (48.1 percent). High-grade squamous intraepithelial lesions (3.4 percent) were present on the samples with viral load between 100 to <1,000RLU/PCB (p = 0.023). There was a correlation between the median for group B viral load and LSIL/HSIL results. CONCLUSIONS: The quantification of viral load, mainly of high-risk HPV types, may be a useful tool for dealing with patients who have suspicious lesions.


OBJETIVO: Comparar a relação entre a carga viral do HPV por captura híbrida II (HCII) e os achados citológicos. MÉTODOS: Trezentas e sessenta e duas amostras reagentes para DNA de HPV por HCII tiveram suas cargas virais classificadas em quatro categorias e correlacionadas aos resultados citológicos. RESULTADOS: Vinte e duas amostras (6,1 por cento) foram reagentes somente para os tipos de baixo risco oncogênico (grupo A) e 340 (93,9 por cento) foram reagentes para os tipos de alto risco oncogênico (grupo B). A correlação entre carga viral das amostras reagentes para o grupo A e resultados citológicos mostrou predominância (50 por cento) de lesão escamosa intraepitelial de baixo grau (LSIL). A maioria das amostras desse grupo teve carga viral entre 1 e < 10RLU/PCA. Nos pacientes reagentes para o grupo B observamos que 52,1 por cento tiveram citologia LSIL e 38,2 por cento tiveram citologia negativa para lesão intraepitelial e malignidade (NILM). Os pacientes com LSIL tiveram a carga viral bem distribuída, com ligeira predominância da categoria de 100 a < 1.000RLU/PCB. As amostras com carga viral entre 1 e < 10RLU/PCB mostraram predominância de citologia NILM (48.1 por cento). Lesões escamosas de alto grau (3,4 por cento) foram presentes nas amostras com carga viral entre 100 e < 1.000RLU/PCB (p = 0,023). Houve correlação entre a mediana da carga viral para o grupo B e os resultados LSIL/HSIL. CONCLUSÕES: A quantificação da carga viral, principalmente para os tipos de HPV de alto risco oncogênico, pode ser uma ferramenta útil para o acompanhamento de pacientes com lesões suspeitas.


Subject(s)
Humans , Female , Viral Load/statistics & numerical data , Nucleic Acid Hybridization/methods , Papillomavirus Infections/diagnosis , Uterine Cervical Neoplasms/diagnosis , Cytodiagnosis
4.
Braz. j. infect. dis ; 10(5): 309-310, Oct. 2006.
Article in English | LILACS | ID: lil-440687

ABSTRACT

We analyzed 87 cervical samples from Campo Grande, Mato Grosso do Sul, with a PGMY/GP+ nested PCR system. Positive samples were typed using E7 type-specific primer pairs for HPV 6/11, 16, 18, 45 and 66. Eighteen samples (22 percent) were infected with HPV6/11, 18 samples (22 percent) with HPV66, 13 samples (15.9 percent) with HPV45, 8 samples (9.8 percent) with HPV18 and 7 samples (8.5 percent) with HPV16. Seventeen samples (20.7 percent) were infected by two HPV types, and five samples (6.1 percent) by three HPV types. We conclude that infection with multiple types is present at a high frequency in our population and that there is a relation between some types and cytological finds.


Subject(s)
Female , Humans , Cervix Uteri/virology , Papillomaviridae/classification , Papillomavirus Infections/virology , Brazil , Papillomaviridae/genetics , Papillomaviridae/isolation & purification , Polymerase Chain Reaction/methods , Serotyping
SELECTION OF CITATIONS
SEARCH DETAIL