Association of viral load and physical status of HPV-16 with survival of patients with head and neck cancer.

Introduction: Head and neck cancers (NHCs) are of multifaceted origins, and tobacco and alcohol are the primary risk factors. Currently, other factors associated with the genesis of these tumours are being considered, among these viral infections, especially human papillomavirus (HPV) infection.

Objective: The objective was to evaluate HPV infection, HPV-16 E6 load and its physical status in patients with squamous cell carcinoma in the head and neck and evaluate its effects in the survival of these patients.

Lymphocyte subsets predictive value and possible involvement of human papilloma virus infection on breast cancer molecular subtypes.

Aim: To detect human papilloma virus (HPV) presence and to characterize cellular immune response in breast cancer patients.

Methods: A total of 74 women were included, of which 48 samples were from patients diagnosed with breast cancer and 26 patients with benign pathology of the breast. Molecular subtype classification was performed based on the immunohistochemical reports of the tumor piece.

Cytokine and metalloproteinases in gingival fluid from patients with chronic periodontitis.

The purpose of the present research was to determine the levels of IL- 1a, IL- 1 P, TNF-a, IL-6, IL-6sR, IL-8, IL-10, MMP-3 and EMP-8 in gingival crevicular fluid (GCF) of subjects with chronic periodontitis. Clinical measurements were carried out in 20 patients with chronic periodontitis and 11 periodontally healthy controls. The clinical indexes evalua- ted were: gingival index (GI), plaque index (PI), bleeding on probing (BOP), probing depth (PD) and clinical attachment loss (CAL); the measurements were taken at six sites per tooth in all teeth in each subject.

Persistent infection with high-risk human papilloma viruses: cohort study, Mérida, Venezuela.

Cervical lesions have been associated with infection by high-risk human papilloma virus (high-risk HPV). In 409 women aged >15 years high-risk HPV lesions were identified. In a cohort of this population persistent infection was compared with cytological, colposcopic, and histological lesions.

Presence of human papillomavirus in breast cancer and its association with prognostic factors.

Breast cancer accounts for 16% of all female cancers worldwide, and in Venezuela, it is the leading cause of death among women. Recently, the presence of high-risk genotypes of human papillomavirus (HPV) has been demonstrated in breast cancer and has been associated with histopathological features of the tumours. In Venezuela, there is no study which determines the association between the presence of HPV in breast cancer and the histopathological features.

Human papillomavirus detection in head and neck squamous cell carcinoma.

Introduction: Human Papillomavirus (HPV) has been associated with benign and malignant lesions in different epitheliums. The relationship between specific genotypes of high-risk HPV and some human cancers is well established. The aim of this work was to detect the HPV genotypes present in head and neck squamous cell carcinoma (HNSCC).

Expression of COX-2 and bcl-2 in oral lichen planus lesions and lichenoid reactions.

Unlabelled: Oral lichen planus and lichenoid reactions are autoimmune type inflammatory conditions of the oral mucosa with similar clinical and histological characteristics. Recent data suggest that oral lichenoid reactions (OLR) present a greater percentage of malignant transformation than oral lichen planus (OLP).

Objective: To compare the expression of bcl-2 and COX-2 in OLP and OLR.

[MMP-3 and MMP-8 levels in patients with chronic periodontitis before and after nonsurgical periodontal therapy].

Immune-inflammatory processes are trigged in chronic periodontitis (CP), where matrix metalloproteinases (MMPs) are released and involved in the degradation of the extracellular matrix components that can be detected in the gingival crevicular fluid (GCF). The purpose of the study was to determine the levels of MMP-3 and MMP-8 in GCF, before and after nonsurgical periodontal treatment (NSPT), to evaluate disease activity and therapy response. Eleven patients with PC and eleven healthy controls were selected.

Comparative analysis of three methods for HPV DNA detection in cervical samples.

High risk HPV infection is considered to play a central role in cervical carcinogenesis. HPV DNA testing has shown to be a very useful tool for screening and following cervical infections. The aim of this study was to compare three methods for HPV DNA detection, along with cytology and colposcopy analysis.

[Detection of human papillomavirus in gingival fluid of Venezuelan HIV patients with periodontal disease].

Evidence suggests that viruses may be involved in the activation of periodontal disease, allowing the overgrowth of periodontal pathogens. The purpose of the present study was to detect the presence of Human Papillomavirus (HPV) in gingival crevicular fluid (GCF) in HIV+ Venezuelan patients with periodontal disease. We evaluated GCF samples from 20 HIV+ patients with periodontal disease from the Infectious Disease Center, Faculty of Dentistry, Central University of Venezuela, and were clinically examined to establish their periodontal conditions, 13 under HAART (antiretroviral therapy) and 7 without HAART.

Human papillomavirus (HPV) type distribution in cervical carcinoma, low-grade, and high-grade squamous intraepithelial lesions in Venezuelan women.

Objective: Cervical cancer is an important cause of mortality among women in developing countries, especially in the Latin America and Caribbean (LAC) region. Infection with high-risk (HR) human papillomavirus (HPV) has been identified as the primary cause of cervical cancer. The aim of this study was to determine the frequency of HR-HPV genotypes in low-grade and high-grade squamous intraepithelial lesions (LSIL, HSIL) and cervical carcinoma (CC) among Venezuelan women.

Human papillomavirus and Epstein Barr virus in oral hairy leukoplakia among HIV positive Venezuelan patients.

Oral hairy leukoplakia (OHL) is commonly found in individuals infected with HIV and represents the most frequent oral manifestation. The purpose of this study was to detect the presence of Human Papillomavirus (HPV) and Epstein Barr Virus (EBV) in OHL of HIV+ Venezuelan patients. We evaluated 21 HIV+ adult patients with clinically present OHL lesions: 11 under antiretroviral therapy, 10 without therapy, and 10 oral mucosal samples as controls.

Presence of human papillomavirus infection determined by hybrid capture assay in cervical lesions in a Venezuelan population.

The aim of this study was to establish the presence of HPV infection in cervical lesions in a Venezuelan population, by Hybrid Capture Assay II (HCA II), and its association with cytological diagnosis. The study included 1483 cervical samples analysed at Laboratorios CITOMED, Caracas, Venezuela, from 2005 to 2007. The woman age range was between 20 and 58 years, and the mean age was 28.

Human papillomavirus in ameloblastoma.

Objective: Ameloblastomas are benign epithelial tumors of odontogenic origin, with a high recurrence rate and local aggressiveness. A few preliminary studies have demonstrated HPV presence mainly in peripheral ameloblastomas. The purpose of this study was to detect HPV-DNA in intraosseous ameloblastomas.

Helicobacter pylori cagA and vacA genotypes in Cuban and Venezuelan populations.

The aim of this study was to determine the presence of Helicobacter pylori cytotoxin-associated gene (cagA)/vacuolating cytotoxin gene (vacA) among patients with chronic gastritis in Cuba and Venezuela. Gastric antrum biopsies were taken for culture, DNA extraction and PCR analysis. Amplification of vacA and cagA segments was performed using two regions of cagA: 349 bp were amplified with the F1/B1 primers and the remaining 335 bp were amplified with the B7629/B7628 primers.

Keratocystic odontogenic tumor associated with nevoid basal cell carcinoma syndrome: similar behavior to sporadic type?

Objective: The objective of this study was to analyze the expression of proliferative markers and p53 in keratocystic odontogenic tumor (KCOT) sporadic type and KCOT associated with nevoid basal cell carcinoma syndrome (NBCCS).

Study Design And Setting: We performed a cross-sectional study. A total of 19 patients with KCOT were selected from the Oral Pathology Laboratory archives, Central University of Venezuela, from 1995 to 2005.

Epstein Barr Virus detection and latent membrane protein 1 in oral hairy leukoplakia in HIV+ Venezuelan patients.

Purpose: To determine the prevalence of Epstein Barr virus (EBV) in oral hairy leukoplakia lesions (OHL) in HIV+ Venezuelan patients.

Material And Method: In this case study, we evaluated 21 HIV+ adult patients with clinically present OHL lesions, 11 who were undergoing antiretroviral therapy, 10 who were not undergoing therapy and 10 HIV-negative adult patients with hyperkeratotic oral mucosal lesions. All of the subjects were assessed at the Infectious Disease Center, Faculty of Dentistry, Central University of Venezuela, and were clinically examined to detect oral mucosal lesions with the confirmed histopathologic diagnosis.

Oral and oropharyngeal cancer in a Venezuelan population.

The aim of this work was to analyze diagnosed cases of Oral Cancer (OC) and Oropharyngeal Cancer (OPC) in a Venezuelan population. We clinically evaluated 130 patients with OC and OPC and a histopathologic diagnosis of squamous cell carcinoma. The patients were analyzed according to gender age, and use of alcohol and tobacco and the tumors were classIfied based on anatomic location, staging parameters, and degree of difFerentiation.

Periodontal conditions and distribution of Prevotella intermedia, Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans in HIV-infected patients undergoing anti-retroviral therapy and in an HIV-seronegative group of the Venezuelan population.

The aim of this study was to determine the periodontal conditions and the distribution of Prevotella intermedia, Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans in a group of HIV-infected patients undergoing anti-retroviral therapy (HAART) and in an HIV-seronegative group. The study sample comprised thirty-two (32) HIV positive patients distributed in two groups (11 HIV+ without HAART and 21 HIV+ with HAART) and 16 HIV seronegative patients. Plaque index, gingival index, pocket depth, and clinical attachment level were evaluated at six sites per tooth in all teeth.

Prevalence of oral lesions in HIV patients related to CD4 cell count and viral load in a Venezuelan population.

Aim: To determine the prevalence of oral lesions in a HIV+ group of patients, related to CD4 cell count and viral load in a Venezuelan population.

Materials And Methods: In the present study, we evaluated 75 HIV+ adult patients, attended at the Center of Infectious Diseases, at the Faculty of Dentistry, Central University of Venezuela. Each patient was clinically examined for detection of oral mucosal lesions.

[Importance of IgG anti-CagA antibodies of Helicobacter pylori in Venezuelan patients with gastric diseases].

Helicobacter pylori is one of the most common bacterial infections worldwide. It is associated with chronic gastritis, peptic ulcer disease and constitutes a major risk factor for gastric adenocarcinoma and lymphoma. The aim of this study was to evaluate the specific serologic immunoglobulin G (IgG) response to whole cells proteins, CagA and urease antigens of Helicobacter pylori in a Venezuelan population.

[Evaluation of K-ras 12 oncogene mutations in Venezuelan patients with Helicobacter pylori infection].

This work evaluated the infection of H. pylori in the different gastric pathologies and its association with the oncogen K-ras 12. Endoscopy was performed in 62 patients and 3 biopsies from the antral region were taked and used for the histological diagnostic, PCR, and point mutations determination.

Prevalence of Helicobacter pylori infection in Warao lineage communities of Delta Amacuro State, Venezuela.

The purpose of this study was the evaluation of Helicobacter pylori infections in children and adults from two indigenous communities of Delta Amacuro State, Venezuela, that differ in hygienic conditions of the housing. The evaluation was performed in 98 children (mean age 7 +/- 3.37 years) and their mothers (33.

Detection of Helicobacter pylori DNA in the oral cavity and gastroduodenal system of a Venezuelan population.

Dental plaque has been suggested as a reservoir for Helicobacter pylori but the hypothesis that the oral microflora may be a permanent reservoir of H. pylori is still controversial. The aims of this study were to determine the presence of H.

Oral lichen planus: immunohistology of mucosal lesions.

Background: Current evidence suggests that immunological mechanisms are involved in oral lichen planus (OLP) pathogenesis. The events implicate activated epithelia that comprise antigen-presenting Langerhans cells, immunocompetent keratinocytes and subepithelial inflammatory infiltrate. Also, the presence of a high density of leucocyte cells may occur for the expression of a variety of adhesion molecules.