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1.
Asian Pac J Cancer Prev ; 15(24): 10905-9, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25605199

RESUMO

PURPOSE: The aim of this study was to evaluate the diagnostic value of FNA-Tg for detecting lymph node metastases in patients with a history of differentiated thyroid cancer (DTC). MATERIALS AND METHODS: A total of 58 patients with DTC diagnosis and evidence of single or multiple suspicious cervical lymph nodes were assessed. All underwent total or near-total thyroidectomy with (35 cases) or without (23 cases) radioiodine (RAI) ablation, followed by thyroid stimulating hormone (TSH) suppression therapy. A total of 68 lymph nodes were examined by ultrasound-guided fine needle aspiration (US-FNA) for both cytological examination and FNA-Tg measurement. Serum Tg and anti-thyroglobulin antibody (TgAb) levels were also measured. Diagnostic performance including sensitivity, specificity, accuracy, positive (PPV) and negative predictive value (NPV) of FNAC and FNA-Tg were calculated and compared. The Spearman's rank correlation coefficient was used to estimate the relationship between FNA-Tg and serum TgAb. RESULTS: The FNA-Tg levels were significantly higher with DTC metastatic lymph nodes (median 927.7 ng/mL, interquartile range 602.9 ng/mL) than non-metastatic lymph nodes (median 0.1 ng/mL, interquartile range 0.4 ng/mL) (p<0.01). Considering 1.0 ng/mL as a threshold value for FNA-Tg, the sensitivity, specificity, accuracy, PPV and NPV of FNA-Tg were 95.7%, 95.5%, 95.6%, 97.8% and 91.3%, respectively. The sensitivity and accuracy of the combination of FNAC and FNA-Tg were significantly higher than that of FNAC alone (p<0.05). The diagnostic performance of FNA-Tg was not significantly different between cases with or without RAI ablation, and the serum TgAb levels did not interfere with FNA-Tg measurements. CONCLUSIONS: Measurement of FNA-Tg is useful. The combination of FNAC and FNA-Tg is more sensitive and accurate for detecting lymph node metastases in patients with a history of DTC than FNAC alone. Serum TgAbs appear to be irrelevant for measurement of FNA-Tg.


Assuntos
Adenocarcinoma Folicular/secundário , Biomarcadores Tumorais/análise , Carcinoma Papilar/secundário , Linfonodos/patologia , Tireoglobulina/análise , Neoplasias da Glândula Tireoide/patologia , Adenocarcinoma Folicular/metabolismo , Adenocarcinoma Folicular/terapia , Biópsia por Agulha Fina , Carcinoma Papilar/metabolismo , Carcinoma Papilar/terapia , Ablação por Cateter , Terapia Combinada , Feminino , Seguimentos , Humanos , Imunoensaio , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Neoplasias da Glândula Tireoide/metabolismo , Neoplasias da Glândula Tireoide/terapia , Tireoidectomia
2.
Zhonghua Xue Ye Xue Za Zhi ; 34(6): 512-5, 2013 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-23827110

RESUMO

OBJECTIVE: To investigate the effect of up-regulated expression of tumor suppressor gene p14(ARF) on apoptosis of chronic myeloid leukemia (CML) cells and its interaction with imatinib. METHODS: Tumor suppressor gene p14(ARF) was transduced into K562 (K562-p14(ARF)) and 4 blast crisis primary CML cells (CML-BC 1-4) using vesicular stomatitis virus glycoprotein (VSV-G) pseudotyped lentiviral vector with cells transduced by empty vector as control. Fluorescence microscopy and flow cytometry were applied to measure transduction efficiency, and Western blotting assay was used to detect p14(ARF) protein of K562 cells. WST-8 method was used to determine cell growth inhibition rate of K562 cells transduced by the target gene under different concentrations of imatinib (0, 0.015, 0.062, 0.125, 0.25, 0.5, 1.0, 2.0 µmol/L). Cell apoptosis and leukemic cellular colony-forming ability were detected by Annexin V-FITC/PI dyeing using flow cytometry (FCM) and semi-solid culture method respectively. RESULTS: Fluorescence microscopy and FCM showed that transduction efficiency (GFP positive cells) of K562-p14(ARF), K562-VSV and CML-BC1 cells were close to 100%, and CML-BC 2-4 cells were 80% to 90% on average. Results of Western blotting showed that the levels of ARF protein expression of K562 cells transduced by p14(ARF) were significantly higher than of untransduced cells; the apoptosis rate of K562-p14(ARF) was 20%; the mean apoptosis rate of 4 primary leukemic cells transduced by the p14(ARF) [(71.1±22.4)%] was significantly higher than of control group [(12.4±6.2)%] (P<0.05). Imatinib significantly inhibited the proliferation of K562-p14(ARF) cells in a dose-dependent manner. The mean leukemic cellular colony-forming unit of 4 primary leukemic cells transduced by the p14(ARF) (41.5±13.2) was significantly lower than of the control group (88.5±7.9) (P<0.05). CONCLUSION: Increased p14(ARF) gene expression could induce apoptosis of CML cells; Moreover, it could enhance inhibitory effect on cell proliferation when combined with imatinib.


Assuntos
Apoptose , Leucemia Mielogênica Crônica BCR-ABL Positiva/metabolismo , Leucemia Mielogênica Crônica BCR-ABL Positiva/patologia , Proteína Supressora de Tumor p14ARF/metabolismo , Regulação Leucêmica da Expressão Gênica , Vetores Genéticos , Humanos , Células K562 , Regulação para Cima
3.
Eur J Pharmacol ; 654(2): 129-34, 2011 Mar 05.
Artigo em Inglês | MEDLINE | ID: mdl-21195709

RESUMO

Multidrug resistance is a serious obstacle encountered in cancer treatment. Since drug resistance in human cancer is mainly associated with overexpression of the multidrug resistance gene 1 (MDR1), the promoter of the human MDR1 gene may be a target for multidrug resistance reversion drug screening. In the present study, HEK293T cells were transfected with pGL3 reporter plasmids containing the 2kb of MDR1 promoter, and the transfected cells were used as models to screen for candidate multidrug resistance inhibitors from over 300 purified naturally occurring compounds extracted from plants and animals. Dioscin was found to have an inhibiting effect on MDR1 promoter activity. The resistant HepG2 cell line (HepG2/adriamycin) was used to validate the activity of multidrug resistance reversal by Dioscin. Results showed that Dioscin could decrease the resistance degree of HepG2/adriamycin cells, and significantly inhibit P-glycoprotein expression, as well as increase the accumulation of adriamycin in HepG2/adriamycin cells as measured by Flow Cytometric analysis. These results suggest that Dioscin is a potent multidrug resistance reversal agent and may be a potential adjunctive agent for tumor chemotherapy.


Assuntos
Membro 1 da Subfamília B de Cassetes de Ligação de ATP/biossíntese , Carcinoma Hepatocelular/genética , Diosgenina/análogos & derivados , Resistencia a Medicamentos Antineoplásicos , Neoplasias Hepáticas/genética , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/metabolismo , Antineoplásicos/uso terapêutico , Carcinoma Hepatocelular/tratamento farmacológico , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Diosgenina/farmacologia , Doxorrubicina/uso terapêutico , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Resistencia a Medicamentos Antineoplásicos/genética , Regulação Neoplásica da Expressão Gênica , Genes MDR , Vetores Genéticos , Células HEK293 , Células Hep G2 , Hepatócitos , Ensaios de Triagem em Larga Escala , Humanos , Neoplasias Hepáticas/tratamento farmacológico , Plasmídeos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo
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