Abstract Human Papillomavirus (HPV) has considerable tropism for epithelial and mucosal tissues and can therefore be found in several anatomical sites, including the oral cavity. This study aimed to investigate the presence of HPV-DNA and the most frequent viral types in patients using full dentures, compare to patients not using full dentures and to associate its presence with socio-epidemiological and behavioral factors. The study consisted of 90 patients with or without full dentures at the time of collection, treated at a public dental clinic. The samples were obtained by exfoliating the oral cavity, and analyzed for HPV-DNA using the nested PCR with PGMY09/11 (450-bp), and general primers GP5+/GP6+ (150-bp). Genotyping was performed by specific-type PCR to HPV 6, 11, 16, 18, 31, 33, and 45; and Restriction Fragment Length Polymorphism (RFLP). Pearson’s Chi-square test (x 2 ) or Fisher’s exact test were applied and significant variables in these tests were analyzed by multinomial logistic regression analysis to estimate odds ratio (OR). HPV-DNA was detected in 27.7% of samples and, among those obtained from patients using full dentures, positivity for HPV-DNA was 41.9% (p = 0.025). The most frequent viral types were low-risk HPV 6 and 11, and high-risk HPV 31 and 45. Patients who used full dentures had an odds ratio of 2.1 to be positive for HPV DNA. Our results indicate the need for periodic dental follow-up of patients with full dentures in order to preserve the basic conditions of oral health, and also to monitor the appearance of lesions with malignant potential.

Women infected with human papillomavirus (HPV) are at a higher risk of developing cervical lesions. In the current study, self and clinician-collected vaginal and cervical samples from women were processed to detect HPV DNA using polymerase chain reaction (PCR) with PGMY09/11 primers. HPV genotypes were determined using type-specific PCR. HPV DNA detection showed good concordance between self and clinician-collected samples (84.6%; kappa = 0.72). HPV infection was found in 30% women and genotyping was more concordant among high-risk HPV (HR-HPV) than low-risk HPV (HR-HPV). HPV16 was the most frequently detected among the HR-HPV types. LR-HPV was detected at a higher frequency in self-collected; however, HR-HPV types were more frequently identified in clinician-collected samples than in self-collected samples. HPV infections of multiple types were detected in 20.5% of clinician-collected samples and 15.5% of self-collected samples. In this study, we demonstrated that the HPV DNA detection rate in self-collected samples has good agreement with that of clinician-collected samples. Self-collected sampling, as a primary prevention strategy in countries with few resources, could be effective for identifying cases of HR-HPV, being more acceptable. The use of this method would enhance the coverage of screening programs for cervical cancer.

OBJECTIVES: The aim of this study was to identify highly oncogenic forms of human papillomavirus in the oral mucosa of asymptomatic men.METHODS: In this study, we analyzed samples of exfoliated cells from the oral cavity of 559 asymptomatic men. DNA-human papillomavirus was detected using the consensus primers PGMY09/11; viral genotyping was performed using type-specific PCR and restriction fragment length polymorphism.RESULTS: DNA-human papillomavirus was detected in 1.3% of the study participants and of those 42.8% were infected by more than one type of virus. Viral types included HPV6, 11, 89 (low oncogenic risk), and HPV52, 53 (high oncogenic risk). Increased vulnerability to human papillomavirus infection was observed in individuals aged over 26 years, among those who reported oral sex practices, and in those who have had more than 16 sexual partners since first engaging in sexual intercourse.CONCLUSIONS: There was a low prevalence of human papillomavirus detection in the oral mucosa of asymptomatic men. Highly oncogenic human papillomavirus types and infection by more than one viral type was observed. Oral sex practices and a large number of sexual partners may increase the risk of acquiring human papillomavirus infection.

Introduction The progression of human papillomavirus (HPV) infection in the anogenital tract has been associated with the involvement of cells with regulatory properties. Evidence has shown that glucocorticoid-induced tumor necrosis factor receptor (GITR) is an important surface molecule for the characterization of these cells and proposes that GITR ligand may constitute a rational treatment for many cancer types. We aimed to detect the presence of GITR and CD25 in cervical stroma cells with and without pathological changes or HPV infection to better understand the immune response in the infected tissue microenvironment. Methods We subjected 49 paraffin-embedded cervical tissue samples to HPV DNA detection and histopathological analysis, and subsequently immunohistochemistry to detect GITR and CD25 in lymphocytes. Results We observed that 76.9% of all samples with high GITR expression were HPV-positive regardless of histopathological findings. High GITR expression (77.8%) was predominant in samples with ≥1,000 RLU/PCB. Of the HPV-positive samples negative for intraepithelial lesion and malignancy, 62.5% had high GITR expression. High GITR expression was observed in both carcinoma and high-grade squamous intraepithelial lesion (HSIL) samples (p = 0.16). CD25 was present in great quantities in all samples. Conclusions The predominance of high GITR expression in samples with high viral load that were classified as HSIL and carcinoma suggests that GITR+ cells can exhibit regulatory properties and may contribute to the progression of HPV-induced cervical neoplasia, emphasizing the importance of GITR as a potential target for immune therapy of cervical cancer and as a disease evolution biomarker.

INTRODUÇÃO: Alguns tipos de papilomavirus humano (HPV) estão envolvidos em processos malignos no epitélio cervical, com 99% 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%). 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.

INTRODUCTION: Some human papillomavirus (HPV) types are involved in malignant processes in the cervical epithelium, with 99% 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%). 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: 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.

The effect of deltamethrin of the sandfly population in a focus of American Cutaneous Leishmaniasis in Viana, Espírito Santo State is desvribed. The phlebotomine population density was determined inside and outside houses during a one year period in a treated and untreated area. The results showed a significant reduction in the number of sandflies inside houses in the treated area compared with both the untreated area and the same area before sparying. Despite having a residual action for 12 months after spraying the insecticide was ineffective outside houses. It is concluded therefore that deltamethrin is an efficient insecticide for reducing the number of phlebotomine sandflies inside houses.