Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Viruses ; 12(9)2020 09 09.
Artigo em Inglês | MEDLINE | ID: mdl-32917014

RESUMO

Recent reports have pointed to the link between persistent inflammation, oxidative stress, and carcinogenesis; however most of the studies concerning the role of viruses in head and neck cancer (HNC) are focused mainly on one type of virus. Our present study aimed to study the relationship between Epstein-Barr virus/human papilloma virus (EBV/HPV) coinfection and glutathione peroxidase (GPx) and superoxide dismutase (SOD) level in oropharyngeal cancer. Fresh-frozen tumor tissue samples were collected from 128 patients with oropharyngeal cancer infected with EBV or HPV or with EBV/HPV coinfection. After DNA extraction, EBV and HPV DNA was detected using a polymerase chain reaction (PCR) assay. GPx and SOD activity was determined in homogenates of cancer tissue using diagnostic kits produced by Randox Laboratories. Both GPx and SOD activity was statistically lower in patients with EBV/HPV coinfection than in a single EBV or HPV infection. Analysis of GPx and SOD activity in relation to histological grading and tumor, node (TN) classification revealed that in poorly-differentiated tumors, the level of antioxidant enzymes was lower compared with well-differentiated lesions and in cases with greater tumor dimensions and lymph-node involvement, both GPx and SOD activity was decreased. Further studies are necessary to clarify the influence of interplay between EBV, HPV, and oxidative stress on malignant transformation of upper aerodigestive tract epithelial cells.


Assuntos
Alphapapillomavirus/fisiologia , Coinfecção/enzimologia , Infecções por Vírus Epstein-Barr/epidemiologia , Glutationa Peroxidase/metabolismo , Herpesvirus Humano 4/fisiologia , Neoplasias Orofaríngeas/virologia , Infecções por Papillomavirus/virologia , Superóxido Dismutase/metabolismo , Adulto , Idoso , Coinfecção/genética , Coinfecção/virologia , Infecções por Vírus Epstein-Barr/genética , Infecções por Vírus Epstein-Barr/virologia , Feminino , Glutationa Peroxidase/genética , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Orofaríngeas/enzimologia , Neoplasias Orofaríngeas/genética , Infecções por Papillomavirus/enzimologia , Infecções por Papillomavirus/genética , Superóxido Dismutase/genética
2.
PLoS One ; 15(3): e0230374, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32210468

RESUMO

Oxidative stress is suggested to be the crucial factor in diabetes mellitus type 2 (DM2) pathogenesis and in the development of diabetic complications. Patients with DM2 may be more susceptible to infections due to hyperglycaemia-induced virulence of various microorganisms. Several studies pointed that Epstein-Barr virus (EBV) infection is associated with reactive oxygen species (ROS) production and/or activation of signalling pathways connected with ROS. The present study analyzed serum activity of glutathione peroxidase (GPx) and superoxide dismutase (SOD) in DM2 patients with and without EBV infection. Blood and saliva were collected from 120 patients with DM2. EBV DNA was detected in the saliva using nested-PCR technique. Spectrophotometric methods were implemented to determine serum GPx and SOD activity with the use of diagnostic kits produced by Randox Laboratories. GPx and SOD activity was decreased in diabetic patients, with the lowest values in DM2 EBV-positive patients. There was correlation between GPx and SOD activity-with increased value of GPx, SOD activity was also rised. In patients with DM2 history longer than 10 years as well as in DM2 patients with obesity, antioxidant enzymes activity was decreased. Determination of examined parameters may be useful in diabetic patients with EBV infection and could be important prognostic factor.


Assuntos
Diabetes Mellitus Tipo 2/sangue , Infecções por Vírus Epstein-Barr/sangue , Glutationa Peroxidase/sangue , Herpesvirus Humano 4/isolamento & purificação , Superóxido Dismutase/sangue , Adulto , DNA Viral/isolamento & purificação , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/imunologia , Infecções por Vírus Epstein-Barr/complicações , Infecções por Vírus Epstein-Barr/imunologia , Infecções por Vírus Epstein-Barr/virologia , Estudos de Viabilidade , Feminino , Glutationa Peroxidase/metabolismo , Herpesvirus Humano 4/genética , Herpesvirus Humano 4/imunologia , Humanos , Masculino , Pessoa de Meia-Idade , Estresse Oxidativo/imunologia , Prognóstico , Espécies Reativas de Oxigênio/imunologia , Espécies Reativas de Oxigênio/metabolismo , Transdução de Sinais/imunologia , Superóxido Dismutase/metabolismo , Adulto Jovem
3.
PLoS One ; 14(9): e0222607, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31550259

RESUMO

A microbiota is a complex ecosystem of microorganisms consisting of bacteria, viruses, protozoa, and fungi living in different niches of the human body, which plays an essential role in many metabolic functions. Modifications in the microbiota composition can lead to several diseases, including metabolic disorders. The aim of this study was to analyze the prevalence of four viruses which can cause persistent infections-Epstein-Barr virus (EBV), human papillomavirus (HPV), cytomegalovirus (CMV), and herpes simplex virus type 1 (HSV-1) in patients with diabetes mellitus type 2 (DM2). Blood, saliva and oral swabs were collected from all the study participants. The nested-PCR technique was used to detect the viral DNA. DNA of at least one virus was detected in 71.1% of diabetic patients and in 30% of individuals without diabetes. In patients with diabetes EBV DNA was detected the most frequently (25.4%), followed by HPV- 19.1%, HSV- 10.4% and CMV- 5.2%. A higher percentage of EBV+HPV co-infection was found among men (30.8%). EBV DNA was statistically more often detected in patients living in rural areas (53.7%), while HPV (91.5%) and EBV+HPV co-infection (22.2%) prevailed among patients from urban areas. In patients with a DM2 history longer than 10 years viral infection was detected more frequently. The prevalence of EBV, HPV and the EBV+HPV co-infection was significantly higher in diabetic patients than in individuals without diabetes. The frequency of these infections depended on the duration of the disease (DM2).


Assuntos
Infecções por Citomegalovirus/epidemiologia , Citomegalovirus , Diabetes Mellitus Tipo 2/virologia , Infecções por Vírus Epstein-Barr/epidemiologia , Herpes Simples/epidemiologia , Herpesvirus Humano 1 , Herpesvirus Humano 4 , Infecções por Papillomavirus/epidemiologia , Adulto , Coinfecção/epidemiologia , Coinfecção/virologia , Infecções por Citomegalovirus/complicações , Diabetes Mellitus Tipo 2/complicações , Infecções por Vírus Epstein-Barr/complicações , Feminino , Herpes Simples/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Infecções por Papillomavirus/complicações , Polônia/epidemiologia , Prevalência , Adulto Jovem
4.
Infect Agent Cancer ; 11: 45, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27547238

RESUMO

BACKGROUND: Each year approximately 6,000 new cases of head and neck cancer are registered in Poland. Human papillomavirus (HPV) and Epstein-Barr virus (EBV) have been associated with tumour formation. Cytokines have been shown to play an important role both in inflammation and carcinogenesis and they can be detected in saliva and serum with ELISA assays. Salivary biomarkers may be used as markers of early cancer detection. The aim of this study was the analysis of the serum and salivary levels of IL-10, TNF-α, TGF-ß and VEGF in patients with oropharyngeal cancer and in healthy individuals. The level of these biomarkers was also analyzed in HPV- and EBV-related cases. METHODS: The study involved 78 patients with histopathologically confirmed oropharyngeal squamous cell carcinoma and 40 healthy controls. Serum and salivary levels of IL-10, TNF-α, TGF-ß and VEGF were analyzed both in patients and in healthy individuals by ELISA method using Diaclone SAS commercially available kits (France). EBV DNA was detected by the nested PCR for amplification of EBNA-2. HPV detection and genotyping was performed using the INNO-LiPA HPV Genotyping Extraassay (Innogenetics N. V, Gent, Belgium). The obtained results were subjected to statistical analysis using Mann-Whitney and Kruskal Wallis tests. Test values of p < 0.05 were considered statistically significant. RESULTS: The level of tested cytokines was higher in patients than in controls both in serum (IL-10: 2.3 pg/ml vs 1.65 pg/ml, p = 0.0003; TGF-ß: 11.3 ng/ml vs 7.8 ng/ml, p = 0.0005; VEGF: 614 pg/ml vs 210 pg/ml, p = 0.0004; TNF-α: 15.0 ng/ml vs 12.90 ng/ml, p = 0.1397) as well as in saliva (IL-10: 5.9 pg/ml vs 2.5 pg/ml, p = 0.00002; TGF-ß: 24.1 ng/ml vs 14.8 ng/ml, p = 0.00002; VEGF: 4321 pg/ml vs 280 pg/ml, p = 0.0000; TNF-α: 23.1 ng/ml vs 11.3 ng/ml, p = 0.00002). EBV DNA was detected in 51.3 % of patients and 20 % of controls, HPV DNA was present in 30.8 % of patients and 2,5 % of controls. The level of IL-10 was statistically higher in patients infected with EBV, HPV and co-infected with EBV/HPV. The level of TNF-α was significantly higher in patients infected with EBV, while TGF-ß in patients with HPV infection and EBV/HPV co-infection. CONCLUSION: Detection of salivary cytokines may be very helpful in early diagnosis, treatment and prognosis of OSCC.

5.
Anticancer Res ; 35(3): 1657-61, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25750324

RESUMO

The role of viruses in the etiology of oral cancer has been proposed in many studies. The aim of the present study was to analyze the prevalence of Epstein-Barr virus, Human Herpes virus type 1, Cytomegalovirus and Human Papilloma virus among patients with oral squamous cell carcinoma in a Polish population. We investigated fresh-frozen tumor tissue fragments obtained from 80 patients with OSCC using the polymerase chain reaction assay. HPV was detected in 32.5% (22.5% were HPV 16), more often in laryngeal (36%) than in oropharyngeal carcinoma (26.6%). EBV was identified in 57.5%, HHV-1 in 7.5%, and CMV in 10% of patients. Co-infection with one or more viruses was detected in 30% of cases and most frequently it was co-infection with EBV and HPV (15%). Further studies are necessary to determine the potential role of EBV and the possible importance of HHV-1 as an infection co-factor in oropharyngeal cancer.


Assuntos
Carcinoma de Células Escamosas/virologia , Citomegalovirus/isolamento & purificação , Herpesvirus Humano 4/isolamento & purificação , Neoplasias Laríngeas/virologia , Neoplasias Orofaríngeas/virologia , Papillomaviridae/isolamento & purificação , Simplexvirus/isolamento & purificação , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...