Institute Oncologia y Hematologia MPPS

Caracas, Venezuela

Institute Oncologia y Hematologia MPPS

Caracas, Venezuela
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Prado P Y.Y.,Institute Oncologia y Hematologia MPPS | Prado P Y.Y.,Servicio Autonomo Institute Biomedicina MPPS UCV | Veitia D.,Institute Oncologia y Hematologia MPPS | Ferreiro M.C.,Hospital Universitario Of Caracas Mpps | And 4 more authors.
Investigacion Clinica (Venezuela) | Year: 2017

Cervical cancer is the second most common cancer in women worldwide. Infection with high oncogenic risk Human Papillomavirus (HPV) is the main etiological factor of this malignancy. Viral identification is achieved by sensitive and specific molecular methods, such as polymerase chain reaction (PCR), which are generally used on cervical biopsies or swabs of biological material. Because of the complications and discomfort that taking these samples implies, studies are conducted with other samples obtained from less invasive methods, such as urine. Accordingly, detection and genotyping of HPV in endocervical swabs and urine were performed to compare results and to evaluate the effectiveness of using the latter samples. The genetic material was obtaining using the commercial kit Axygen. For viral detection and typing the conventional PCR technique was used. Positivity for HPV in cervical swabs was 68.6% and 62.9% in urine samples, similar values and comparable to previous studies. Likewise, the concordance obtained between the results of the samples used with respect to the identified viral types was “moderate” (k = 0.609), with high values of sensitivity and specificity of 83.3% and 81.8%, respectively, when urine samples were used. These results point to the possibility of developing an effective diagnosis for HPV using urine samples, because it would reduce the intervention of trained personnel, cost and discomfort for the patients. © 2017, Instituto de Investigaciones Clinicas. All rights reserved.


De Guglielmo Z.,Institute Oncologia y Hematologia MPPS | Rodriguez A.,FACES UCV
Revista de Obstetricia y Ginecologia de Venezuela | Year: 2016

Organisms produce substances, usually proteins, whose concentration and detection level varies between healthy cells, diseased cells or benign conditions, which are used as markers of a given pathology, including cancer. Precisely, the importance or value of a given marker will depend on the accuracy of their clinical and research use for the diagnosis, prognosis and staging of the disease. Thus, a marker detection may be central to the establishment of a therapy or treatment to a patient. Below a review is presented with an updated version of the various markers used in screening for uterine cancer, including proteins, RNA and DNA sequences changes, exposing their advantages and limitations.


De Guglielmo Z.,Institute Oncologia y Hematologia MPPS | Avila M.,Institute Oncologia y Hematologia MPPS | Mora A.,Ginecoobstetras de la Maternidad Concepcion Palacios | Melendez M.,Ginecoobstetras de la Maternidad Concepcion Palacios | Correnti M.,Institute Oncologia y Hematologia MPPS
Revista de Obstetricia y Ginecologia de Venezuela | Year: 2013

Objective: In this study was conducted subclinical human papillomavirus detection in samples from patients diagnosed with cervical ectropion to assess the prevalence of human papillomavirus infection associated with this condition. Methods: DNA was extracted with organic solvents (phenol /chloroform- isoamylic). Human papillomavirus detection was performed by PCR with generic primers MY09 and MY11 and the viral typing was performed using a commercial MPCR kit. Setting: Laboratorio de Genetica Molecular-Instituto de Oncologia y Hematologia; Results: The results showed that 26% of the evaluated sample (13/50) was positive for the presence of human papillomavirus genome. Viral typing test identified high- oncogenic risk human papillomavirus (types 16 or 18) in 38.45.% of the positives cases. Likewise, 38.45% was low oncogenic risk (types 6, 11 or mixed infection with 6/11 human papillomavirus) and 23.07% could not be typified with the used methodology. Conclusions: Although this result is not statistically significant, the virus latent presence highlights the need for greater medical surveillance for positive patients, especially in cases where detected 16 and 18 high-risk oncogenic human papillomavirus types, because they may have increased risk of cervical cancer.


Vietia D.,Institute Oncologia Y Hematologia MPPS | Liuzzi J.,Servicio Of Cabeza Y Cuello Del Hospital Oncologico Padre Machado Ivss | Avila M.,Institute Oncologia Y Hematologia MPPS | De Guglielmo Z.,Institute Oncologia Y Hematologia MPPS | And 2 more authors.
ecancermedicalscience | Year: 2014

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). Methods: We evaluated 71 samples of patients with histopathological diagnosis of HNSCC. The DNA extraction was conducted with the QIAGEN commercial kit. HPV detection and genotyping were performed by reverse hybridisation (INNO-LiPA) following the commercial specifications. Results: The mean age of the patients evaluated was 60.7 ± 13.11 years. The distribution of the lesions included 25 (35.20%) cases of squamous cell carcinoma (SCC) of the oral cavity, 23 (32.39%) of larynx, 16 (22.50%) of the oropharynx, 4 (5.63%) of paranasal sinus, and 2 (2.80%) cases of SCC of the nostril. Of the patients, 78.9% were males, and of these 76% were tobacco users and 67.6% were alcohol consumers. The viral DNA was detected in 67.6% of the samples. The oral cavity and the larynx were the highest HPV-positivity sites with 35.40% and 29.10% respectively. The most frequent genotype was 16 as single infection (18.70%), or in combination with another HPV types. In the oral cavity and larynx the genotypes 16 or the combination 6 and 51 were present in 11.76% and 14.28%, respectively; and in the oropharynx the most frequent genotype was 16 in 22.50% of the cases, and in the paranasal sinus 50% presented infection with HPV-6. We observed that tumours with most advanced size and stage presented greater HPV positivity. Conclusions: This study shows a high percentage of HPV positivity in SCC is mainly associated with high-risk HPV. It is important to highlight that viral infection, especially HPV-16, could be a risk factor in HNSCC progression. © the authors.


PubMed | Servicio Of Cabeza Y Cuello Del Hospital Oncologico Padre Machado Ivss and Institute Oncologia y Hematologia MPPS
Type: | Journal: Ecancermedicalscience | Year: 2014

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).We evaluated 71 samples of patients with histopathological diagnosis of HNSCC. The DNA extraction was conducted with the QIAGEN commercial kit. HPV detection and genotyping were performed by reverse hybridisation (INNO-LiPA) following the commercial specifications.The mean age of the patients evaluated was 60.7 13.11 years. The distribution of the lesions included 25 (35.20%) cases of squamous cell carcinoma (SCC) of the oral cavity, 23 (32.39%) of larynx, 16 (22.50%) of the oropharynx, 4 (5.63%) of paranasal sinus, and 2 (2. 80%) cases of SCC of the nostril. Of the patients, 78.9% were males, and of these 76% were tobacco users and 67.6% were alcohol consumers. The viral DNA was detected in 67.6% of the samples. The oral cavity and the larynx were the highest HPV-positivity sites with 35.40% and 29.10% respectively. The most frequent genotype was 16 as single infection (18.70%), or in combination with another HPV types. In the oral cavity and larynx the genotypes 16 or the combination 6 and 51 were present in 11.76% and 14.28%, respectively; and in the oropharynx the most frequent genotype was 16 in 22.50% of the cases, and in the paranasal sinus 50% presented infection with HPV-6. We observed that tumours with most advanced size and stage presented greater HPV positivity.This study shows a high percentage of HPV positivity in SCC is mainly associated with high-risk HPV. It is important to highlight that viral infection, especially HPV-16, could be a risk factor in HNSCC progression.

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