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Registros recuperados: 34
Primeira ... 12 ... Última
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Overexpression of ezrin and galectin-3 as predictors of poor prognosis of cervical cancer BJMBR
Li,M.; Feng,Y.M.; Fang,S.Q..
The aim of this study was to explore the correlation of ezrin and galectin-3 expressions with prognosis in cervical cancer. The immunohistochemical method was applied to detect ezrin and galectin-3 expressions in normal cervix tissues (n=30), cervicitis tissues (n=28), cervical intraepithelial neoplasia (CIN) tissues (classified as I-III, n=89), and cervical carcinoma tissues (n=84). Follow-up was conducted for 5 to 78 months to analyze the correlation of protein expressions with prognosis. Ezrin and galectin-3 expressions in cervical cancer were significantly higher than in normal cervix, cervicitis and CIN (all P<0.05), and expressions in CIN were significantly higher than in normal cervix and cervicitis (both P<0.05). The expressions of ezrin and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ezrin protein; Galectin-3 protein; Cervical cancer; Deep myometrial invasion; Lymph node metastasis; Prognosis.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000400601
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p16INK4 expression in precursor lesions of squamous cell cervical cancer related to the presence of HPV-DNA BJMBR
Godoy,A.E.G.; Mandelli,J.; Oliveira,F.H.; Calegari,S.; Moura,L.B.; Serafini,E.P..
The purpose of the present study was to identify the expression of p16INK4 in cervical cancer precursor lesions by immunohistochemistry and to correlate it with lesion grade and presence of human papillomavirus (HPV) infection. Cervical specimens from 144 women seen consecutively at the gynecology outpatient clinic of our institution from December 2003 to May 2005 were analyzed by cytopathology, histopathology, polymerase chain reaction for HPV-DNA, and p16INK4 immunostaining. Histologically normal biopsies, HPV-DNA negative by polymerase chain reaction, were used as control. HPV-DNA prevalence, including the control group, was 68.1% and the prevalence of p16INK4 expression was 55.0%. The percentage of cells stained by p16INK4 ranged from 10 to 100%, both...
Tipo: Info:eu-repo/semantics/article Palavras-chave: P16INK4; Cervical cancer; Human papillomavirus; Immunohistochemistry.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000700006
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PCR-RFLP assay as an option for primary HPV test BJMBR
Golfetto,L.; Alves,E.V.; Martins,T.R.; Sincero,T.C.M.; Castro,J.B.S.; Dannebrock,C.; Oliveira,J.G.; Levi,J.E.; Onofre,A.S.C.; Bazzo,M.L..
Persistent human papillomavirus (HPV) infection is an essential factor of cervical cancer. This study evaluated the analytical performance of restriction fragment length polymorphism polymerase chain reaction (PCR-RFLP) assay compared to PapilloCheck® microarray to identify human papilloma virus (HPV) in cervical cells. Three hundred and twenty-five women were analyzed. One sample was used for conventional cytology and another sample was collected using BD SurePath™ kit for HPV tests. Eighty samples (24.6%) were positive for HPV gene by PCR-Multiplex and were then submitted to PCR-RFLP and PapilloCheck® microarray. There was a genotyping agreement in 71.25% (57/80) on at least one HPV type between PCR-RFLP and PapilloCheck® microarray. In 22 samples...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cervical cancer; HPV; Screening; PCR-RFLP; PapilloCheck® microarray.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000500619
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Problems and pitfalls in vulvar and cervical cancer sentinel node scintigraphy BABT
Sinzinger,Helmut; Granegger,Susanne; Palumbo,Barbara; Palumbo,Renato.
After the introduction for penile cancer, the sentinel lymph node imaging is increasingly applied in various types of cancer. After the initial learning phase, 105 patients with vulvar and 24 with cervical cancer have been investigated. In vulvar cancer all the imaged sentinel nodes were discovered by the portable probe intraoperatively. No false negative sentinel node was observed. The most critical issue is the tracer application. Performed strictly intradermally, the sentinel node shows up immediately. Concomitant use of isosulfan blue dye did not improve the results and was stopped therefore. Similarly, more superficial (intra/subendothelial) application brings up better results as compared to deeper injection in cervical cancer patients. No false...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sentinel lymph node; Vulvar cancer; Cervical cancer; Scintigraphy.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700007
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Production of L1 protein from different types of HPV in Pichia pastoris using an integrative vector BJMBR
Coimbra,E.C.; Gomes,F.B.; Campos,J.F.; D’arc,M.; Carvalho,J.C.; Mariz,F.C.; Jesus,A.L.S.; Stocco,R.C.; Beçak,W.; Freitas,A.C..
Human papillomavirus (HPV) infection is the most common sexually transmitted disease in the world and is related to the etiology of cervical cancer. The most common high-risk HPV types are 16 and 18; however, the second most prevalent type in the Midwestern region of Brazil is HPV-33. New vaccine strategies against HPV have shown that virus-like particles (VLP) of the major capsid protein (L1) induce efficient production of antibodies, which confer protection against the same viral type. The methylotrophic yeast Pichia pastoris is an efficient and inexpensive expression system for the production of high levels of heterologous proteins stably using a wild-type gene in combination with an integrative vector. It was recently demonstrated that P. pastoris can...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Human papillomavirus; Cervical cancer; Pichia pastoris; L1.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001200003
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Radiotherapy modulates expression of EGFR, ERCC1 and p53 in cervical cancer BJMBR
de Almeida,V.H.; de Melo,A.C.; Meira,D.D.; Pires,A.C.; Nogueira-Rodrigues,A.; Pimenta-Inada,H.K.; Alves,F.G.; Moralez,G.; Thiago,L.S.; Ferreira,C.G.; Sternberg,C..
Cervical cancer is a public health problem and the molecular mechanisms underlying radioresistance are still poorly understood. Here, we evaluated the modulation of key molecules involved in cell proliferation, cell cycle and DNA repair in cervical cancer cell lines (CASKI and C33A) and in malignant tissues biopsied from 10 patients before and after radiotherapy. The expression patterns of epidermal growth factor receptor (EGFR), excision repair cross-complementation group 1 (ERCC1) and p53 were evaluated in cancer cell lines by quantitative PCR and western blotting, and in human malignant tissues by immunohistochemistry. The mutation status of TP53 gene was evaluated by direct sequencing. Among cell lines, absent or weak modulations of EGFR, ERCC1 and p53...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cervical cancer; Radiotherapy; Epidermal growth factor receptor (EGFR); P53; Excision repair cross-complementation group 1 (ERCC1).
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000100608
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SULF2 promotes tumorigenesis and inhibits apoptosis of cervical cancer cells through the ERK/AKT signaling pathway BJMBR
Jiang,Tao; Chen,Zhao-Hui; Chen,Zhe; Tan,Dan.
The objective of this study was to explore the role of the SULF2-mediated ERK/AKT signaling pathway in cervical cancer. SULF2 expression was detected in tumor tissues and tumor-adjacent normal tissues from cervical cancer patients. HeLa cells were divided into six groups: control group, NC group, SULF2 siRNA group, SULF2 group, SULF2 + LY294002 group, and SULF2 + U0125 group. In each group, HeLa cells received the corresponding treatment, followed by measurement of the cellular biological characteristics and expression of the ERK/AKT signaling pathway. We also confirmed the effect of SULF2 in vivo using a xenograft model in nude mice. SULF2 was upregulated in cervical cancer tissues, which was specifically associated with the clinical stage, histological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: SULF2; Cervical cancer; ERK/AKT; Proliferation; Apoptosis.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000200608
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The contribution of Latin American research to HPV epidemiology and natural history knowledge BJMBR
Sichero,L.; Picconi,M.A.; Villa,L.L..
Our aim was to review the major contributions of studies conducted in different Latin American (LA) countries to the field of human papillomavirus (HPV) epidemiology, natural history, risk of disease, and prevention strategies, mainly in the uterine cervix. Although cytological screening is established in several countries in LA, incidence and mortality rates from cervical cancer (CC) are still extremely high. Finally, data from large cohort studies conducted in LA countries provided seminal data to propose primary and secondary prevention modalities: the HPV vaccine has been introduced in the national immunization programs of several LA countries and multiple screening experiences using HPV testing are under evaluation in the region.
Tipo: Info:eu-repo/semantics/article Palavras-chave: HPV; Latin America; Immunization; Cervical cancer; Natural history; Screening.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000200302
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The effect of performing corrections on reported uterine cancer mortality data in the city of São Paulo BJMBR
Antunes,J.L.F.; Wünsch-Filho,V..
Reports of uterine cancer deaths that do not specify the subsite of the tumor threaten the quality of the epidemiologic appraisal of corpus and cervix uteri cancer mortality. The present study assessed the impact of correcting the estimated corpus and cervix uteri cancer mortality in the city of São Paulo, Brazil. The epidemiologic assessment of death rates comprised the estimation of magnitudes, trends (1980-2003), and area-level distribution based on three strategies: i) using uncorrected death certificate information; ii) correcting estimates of corpus and cervix uteri mortality by fully reallocating unspecified deaths to either one of these categories, and iii) partially correcting specified estimates by maintaining as unspecified a fraction of deaths...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Uterine cancer; Cervical cancer; Mortality; Statistical models; Socioeconomic factors; São Paulo.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000800012
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The environmental cofactors in carcinogenesis in high risk HPV/HIV-positive women BJID
Paulo,Michele; Borges,Alex Bittencourt; Duarte,Geraldo; Quintana,Silvana Maria; Montes,Marlise Bonetti Agostinho; Toloi,Maria Regina Torqueti.
The objective of the present study was to assess the presence of human papilloma virus (HPV) in HIV-infected women, with comparison between the Papanicolaou cytologic technique and the molecular PCR technique, as well as to determine the type of HPV, to measure cellular immunocompetence and to identify the presence of risk factors for the acquisition of HPV infection. Thirty HIV-infected women were selected. Vaginal and endocervical samples were collected from 27 of them. The smears were examined by 3 experienced cytologists to diagnose the presence of HPV by the Papanicolaou technique and the results were compared to HPV detection and typing by PCR. HPV-infected patients were interviewed in order to identify the presence of risk factors for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HPV; HIV-infected women; Cervical cancer; Carcinogenesis; Antiretroviral therapy.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000200003
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The Role of Apollon Gene Silencing on Viablity and Radiosensitivity of Cervical Cancer Hela Cells BABT
Milani,Saeideh; Bandehpour,Mojgan; Sharifi,Zohreh; Kazemi,Bahram.
Cervical cancer is the second common cause of cancer deaths in women worldwide. Radioresistancy of cancer is a principal cause of treatment impairing. Inhibitor of apoptosis proteins (IAPs) widely block apoptosis against apoptotic stimuli, including current chemo- and radiation therapies. Apollon, a membrane of IAP, can support cells against apoptosis and is over expressed in some treatment-resistant cancer cells. The aim of this study was to evaluate the effects of apollon knockdown on induction of apoptosis and also its potential for enhancement of radiosensitvity on hela cells. plasmid encoding shRNA which has been confirmed its effect against apollon, transfected into hela cells. Consequent effects on the level of P53 , Bax and BAK analyzed by real...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apollon; Apoptosis; Radiosensitivity; Cervical cancer.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100320
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TT virus in peripheral blood cells from patients with human papillomavirus (HPV): investigating association with cervical carcinoma BABT
Suzuki,Patrícia Sayuri; Oliveira,Karen Brajão de; Herrera,Ana Cristina do Amaral; Borelli,Sueli Donizete; Guembarovski,Roberta Losi; Oliveira,Carlos Eduardo Coral de; Oda,Julie Massayo Maeda; Ozawa,Patricia Midori Murobushi; Watanabe,Maria Angelica Ehara.
Torque Teno Virus (TTV) presence was investigated in peripheral blood of 117 brazilian women by nested polymerase chain reaction. TTV DNA was observed in 18.6% of healthy donors and in 24.32% Human Papillomavirus (HPV) patients. TTV presence was also investigated in the HPV positive group for comparison between the cervical cancer and noncancerous patients. TTV DNA prevalence was significantly higher among the HPV positive patients with cervical cancer (57.14%) than in HPV noncancerous patients (16.67%). Thus, the presence of TTV infection could be a risk factor for cancer development in the patients presenting HPV-TTV coinfection. Further studies are required to clarify the TTV influence in HPV pathogenesis.
Tipo: Info:eu-repo/semantics/article Palavras-chave: TTV DNA; HPV; Cervical cancer.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200010
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Uncommon non-oncogenic HPV genotypes, TP53 and MDM2 genes polymorphisms in HIV-infected women in Southern Brazil BJID
Entiauspe,Ludmila Gonçalves; Seixas,Fabiana Kömmling; Nunes,Emily Montosa; Rodrigues,Fernanda Martins; Dellagostin,Odir A.; Collares,Tiago; Silveira,Mariângela Freitas da.
Background:It is believed that Human Papillomavirus (HPV) and Human Immunodeficiency Virus coinfection contributes to increase the risk for cervical intraepithelial injuries. Several factors may contribute to cervical cancer (CC) development, including genetic variants such as TP53and MDM2 gene polymorphisms.Materials and methods:A hundred HIV-infected women were examined for HPV detection and its genotypes, as well as the frequencies of the SNPs Arg72Pro and SNP309 and their associations with CC risk factors. Nested Polymerase Chain Reaction (nPCR) was used for HPV detection and PCR-RFLP for TP53 and MDM2 SNP309 genotyping.Results:HPV DNA was detected in 68% of samples. A higher frequency of low-risk HPV genotypes (66.7%) was observed when compared to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HPV infection; HIV infection; Cervical cancer; Epidemiology.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000600643
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Use of FTA elute card impregnated with cervicovaginal sample directly into the amplification reaction increases the detection of human papillomavirus DNA BJM
Santos,Carla R.; Franciscatto,Laura G.; Barcellos,Regina B.; Almeida,Sabrina E. M; Rossetti,Maria Lucia R..
This study aimed to evaluate the use of the FTA elute cardTM impregnated with cervicovaginal sample directly in the PCR amplification for detection of HPV-DNA. The results were compared to a reference technique. This method was more efficient than the protocol indicated by the manufacturer, identifying 91.7% against 54.2% of the positive samples.
Tipo: Info:eu-repo/semantics/article Palavras-chave: HPV; Cervical cancer; FTA elute; Molecular detection.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100047
Registros recuperados: 34
Primeira ... 12 ... Última
 

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