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1.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 40(2): 211-218, 2018 Apr 28.
Artículo en Zh | MEDLINE | ID: mdl-29724311

RESUMEN

Objective To investigate the clinicopathological features,treatment,and prognosis of patients with malignant peritoneal mesothelioma(MPM). Methods Clinical data of 25 MPM patients admitted to Peking Union Medical College Hospital from 1993 to 2017 were retrospectively analyzed.Results The mean age of these 25 patients with pathologically confirmed MPM(epithelioid subtype) was 50 years.The tumors were diffuse in 24 patients(96%) and localized in 1 patient(4%).Cytoreductive surgery was performed in 6 patients(24%),intraperitoneal chemotherapy in 12 patients(48%),and systemic chemotherapy in 24 patients(96%).The median overall survival was 26 months,with 1-year survival rate of 74.2% and 5-year survival rate of 16.7%.Cytoreductive surgery or intraperitoneal chemotherapy combined with systemic chemotherapy showed a significant survival advantage over intraperitoneal or intravenous chemotherapy alone(P=0.046,P=0.005).Cytoreductive surgery(P=0.018) showed statistical significance by multivariate analysis as a predictive factor in survival(hazard rate=6.889;95%CI=1.386-34.247).Conclusions MPM has its diverse clinical manifestations.Patients after cytoreductive surgery have longer survival time.Chemotherapy drugs(except for pemetrexed) and targeted therapy may be promising treatments.Cytoreductive surgery is an independent prognostic factor.


Asunto(s)
Mesotelioma/diagnóstico , Mesotelioma/terapia , Neoplasias Peritoneales/diagnóstico , Neoplasias Peritoneales/terapia , Terapia Combinada , Humanos , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia
2.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 39(5): 593-601, 2017 10 30.
Artículo en Inglés | MEDLINE | ID: mdl-29125099

RESUMEN

Objective To study the single nucleotide polymorphisms (SNPs)that predict a patient's risk of grade 2-3 paclitaxel-induced peripheral sensory neuropathy (PSN) in Chinese Han populations.Methods Totally 216 patients received paclitaxel in Peking Union Medical College Hospital from May 2014 to December 2016 were enrolled.DNA was isolated from peripheral blood.Genotyping for eight candidate SNPs was performed on Sequenom-MassARRARYiPLEX platform.Patients were followed up and PSN was assessed by trained physicians according to National Cancer Institute-Common Terminology Criteria for Adverse Events v4.03.Results A total of 209 patients entered the final analysis.Among the candidate SNPs,only rs4141404:A>C(LIMK2) was significantly associated with grade 2/3 PSN (OR:4.32,95%CI:2.37-7.89,P<0.0001).In multivariate logistic regression analysis,both rs4141404:A>C(LIMK2) and history of receiving platinum compound (OR:2.70,95%CI:1.32-5.51,P=0.007) were associated with grade 2/3 PSN.Conclusion rs4141404:A>C(LIMK2) may be the markers of risk of grade 2/3 PSN.


Asunto(s)
Quinasas Lim/genética , Paclitaxel/efectos adversos , Enfermedades del Sistema Nervioso Periférico/inducido químicamente , Polimorfismo de Nucleótido Simple , Pueblo Asiatico , China , Genotipo , Humanos , Enfermedades del Sistema Nervioso Periférico/genética
3.
RNA ; 19(4): 552-60, 2013 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-23431408

RESUMEN

MicroRNAs (miRNAs) are single-stranded, 18- to 23-nt RNA molecules that function as regulators of gene expression. Previous studies have shown that microRNAs play important roles in human cancers, including gliomas. Here, we found that expression levels of miR-181b were decreased in gliomas, and we identified IGF-1R as a novel direct target of miR-181b. MiR-181b overexpression inhibited cell proliferation, migration, invasion, and tumorigenesis by targeting IGF-1R and its downstream signaling pathways, PI3K/AKT and MAPK/ERK1/2. Overexpression of IGF-1R rescued the inhibitory effects of miR-181b. In clinical specimens, IGF-1R was overexpressed, and its protein levels were inversely correlated with miR-181b expression. Taken together, our results indicate that miR-181b functions in gliomas to suppress growth by targeting the IGF-1R oncogene and that miR-181b may serve as a novel therapeutic target for gliomas.


Asunto(s)
Proliferación Celular , Transformación Celular Neoplásica , Glioma/metabolismo , Glioma/patología , MicroARNs/metabolismo , Receptor IGF Tipo 1/metabolismo , Inhibidores de la Angiogénesis/metabolismo , Animales , Movimiento Celular , Genes Supresores de Tumor , Humanos , Masculino , Ratones , Ratones Desnudos , MicroARNs/genética , Transducción de Señal
4.
Tumour Biol ; 36(5): 3823-9, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25566967

RESUMEN

Fenofibrate, a fibric acid derivative, is known to possess lipid-lowering effects. Although fenofibrate-induced peroxisome proliferator-activated receptor alpha (PPARα) transcriptional activity has been reported to exhibit anticancer effects, the underlying mechanisms are poorly understood. In this study, we investigated the mechanisms behind the antiproliferative effects of fenofibrate in U87MG cells (human glioma cell line) using the WST-8 Cell Proliferation Assay Kit. Furthermore, we examined genome-wide gene expression profiles and molecular networks using the DAVID online software. Fenofibrate reduced the expression of 405 genes and increased the expression of 2280 genes. DAVID analysis suggested that fenofibrate significantly affected cell cycle progression and pathways involved in cancer, including the mTOR signaling pathway and insulin signaling pathway. Results of flow cytometry analysis indicated that fenofibrate induced cell cycle G0/G1 arrest in U87MG cells. Furthermore, we identified the FoxO1-p27(kip) signaling axis to be involved in fenofibrate-induced cell cycle arrest. Our findings suggest that in addition to its known lipid-lowering effects, fenofibrate may be used as an antitumor agent in glioma therapy.


Asunto(s)
Inhibidor p27 de las Quinasas Dependientes de la Ciclina/biosíntesis , Fenofibrato/administración & dosificación , Factores de Transcripción Forkhead/biosíntesis , Glioblastoma/tratamiento farmacológico , PPAR alfa/biosíntesis , Puntos de Control del Ciclo Celular/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Proteína Forkhead Box O1 , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Genoma Humano , Glioblastoma/genética , Glioblastoma/patología , Humanos , Proteínas de Neoplasias/biosíntesis , Transducción de Señal/efectos de los fármacos , Serina-Treonina Quinasas TOR/biosíntesis
5.
Mol Cell Biochem ; 403(1-2): 33-41, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25648114

RESUMEN

The dysregulation of miR-1224-5p has been reported in several human cancers. However, the expression and function of miR-1224-5p in glioma remains unknown. The aim of our study was to investigate the effect of miR-1224-5p on glioma cells and to determine its functional signaling mediators. Using 198 glioma samples within the Chinese Glioma Genome Atlas expression dataset, we demonstrated that miR-1224-5p expression is decreased in high-grade gliomas when compared with low-grade gliomas. Differential miR-1224-5p expression in 50 randomly selected samples was verified by in situ hybridization. The expression of miR-1224-5p was shown to positively correlate with overall survival in 82 glioblastoma patients. Exogenous expression of miR-1224-5p in glioma cells suppressed proliferation and invasion and promoted apoptosis. Target prediction algorithms identified a consensus miR-1224-5p recognition site in the 3'UTR of the cAMP response element-binding protein (CREB1) gene, and this sequence was shown to directly confer miR-1224-5p repression in luciferase reporter assays. Furthermore, exogenous miR-1224-5p expression was shown to down-regulate CREB1, as well as its downstream target genes matrix metalloproteinase-9 and B-cell lymphoma-2. Conversely, over-expression of CREB1 reversed the effect of miR-1224-5p on the proliferation, invasion, and apoptosis of glioma cells. These data indicate that miR-1224-5p may inhibit tumor-associated activity in malignant gliomas by targeting CREB1.


Asunto(s)
Neoplasias Encefálicas/genética , Proteína de Unión a Elemento de Respuesta al AMP Cíclico/metabolismo , Genes Supresores de Tumor , Glioma/genética , MicroARNs/metabolismo , Apoptosis , Secuencia de Bases , Neoplasias Encefálicas/patología , Línea Celular Tumoral , Proliferación Celular , Regulación hacia Abajo/genética , Regulación Neoplásica de la Expresión Génica , Glioma/patología , Humanos , MicroARNs/genética , Datos de Secuencia Molecular , Invasividad Neoplásica , Pronóstico , Análisis de Supervivencia
7.
Food Funct ; 14(1): 399-412, 2023 Jan 03.
Artículo en Inglés | MEDLINE | ID: mdl-36512065

RESUMEN

In this study, we investigated the preventive effect of Lycium barbarum L. berry extract on age-related macular degeneration (AMD) and the main components responsible for its antioxidant activity. An AMD mouse model was developed by feeding 18-month-old mice with a 1% hydroquinone diet. Meanwhile, the model mice were treated with water extract (LBW) and alcohol extract (LBE) of L. barbarum berries respectively for 3 months. It was found that the retinal structural abnormalities were improved and the oxidation stress and inflammatory imbalance were both attenuated in model mice treated with the extracts of L. barbarum berries. According to the metabolomics analysis of the serum of model mice, LBW regulated the metabolism of unsaturated fatty acids and sphingolipids, while LBE extracts tended to regulate taurine metabolism. On sodium iodate induced oxidative injury of ARPE-19 cells, water extracts of L. barbarum berries eluted with 95% ethanol (LBW-95E) on AB-8 macroporous resin significantly improved the cell viability and attenuated oxidative stress by increasing the superoxide dismutase (SOD) activity and glutathione (GSH) content, decreasing the reactive oxygen species (ROS) content, promoting the entry of nuclear factor erythroid-derived 2-like 2 (Nrf2) into the nucleus and up-regulating the heme oxygenase-1 (HO-1) expression. Scopoletin, N-trans-feruloyltyramine and perlolyrine were identified as the main components of LBW-95E. These results demonstrated that L. barbarum berry extracts protected the retina of aging AMD model mice from degeneration and LBW-95E was the vital antioxidant activity fraction of LBW. These findings suggest that L. barbarum berry extracts might be an excellent natural source for the development of retinal protection-related drugs or dietary supplements.


Asunto(s)
Antioxidantes , Lycium , Ratones , Animales , Antioxidantes/farmacología , Lycium/química , Frutas , Extractos Vegetales/farmacología , Retina , Estrés Oxidativo , Glutatión , Agua/farmacología
8.
Zhongguo Shi Yan Xue Ye Xue Za Zhi ; 31(3): 707-713, 2023 Jun.
Artículo en Zh | MEDLINE | ID: mdl-37356930

RESUMEN

OBJECTIVE: To explore the influence of lymphocyte-to-monocyte ratio (LMR) and neutrophil-to-lymphocyte ratio (NLR) on the prognosis of patients with extranodal NK/T cell lymphoma (ENKTL). METHODS: The clinical data of 203 patients with ENKTL admitted to the First Affiliated Hospital of Zhengzhou University from January 2011 to January 2020 were retrospectively analyzed. The ROC curve determined the limit values of LMR and NLR; Categorical variables were compared using a chi-square test, expressed as frequency and percentage (n,%). Continuous variables were expressed as medians and extremes and compared with the Mann-Whitney U test; Progression-free survival (PFS) and overall survival (OS) of different grouped LMR and NLR patients were analyzed using Kaplan-Meier curves and compared with log-rank tests. The COX proportional risk regression model was used to perform one-factor and multi-factor analysis of PFS and OS. RESULTS: The optimal critical values of LMR and NLR were determined by the ROC curve, which were 2.60 and 3.40, respectively. LMR≤2.60 was more likely to occur in patients with bone marrow invasion (P=0.029) and higher LDH (P=0.036), while NLR≥3.40 was more likely to occur in patients with higher ECOG scores (P=0.002), higher LDH (P=0.008), higher blood glucose (P=0.024), and lower PLT (P=0.010). Kaplan-Meier survival analysis showed that PFS and OS of patients in the high LMR group were significantly better than the low LMR group, while PFS and OS in the low NLR group were significantly better than the high NLR group. The results of multivariate COX analysis showed that EBV-DNA positive (P=0.047), LMR≤2.60 (P=0.014), NLR≥3.40 (P=0.023) were independent risk factors affecting PFS in patients with ENKTL. LMR≤2.60 (P<0.001), NLR≥3.40 (P=0.048), and high ß2-MG (P=0.013) were independent risk factors affecting OS in patients with ENKTL. CONCLUSION: Low LMR and high NLR before treatment are associated with poor prognosis in patients with ENKTL, which also can be used as an easily testable, inexpensive, and practical prognostic indicator in the clinic.


Asunto(s)
Linfoma Extranodal de Células NK-T , Monocitos , Humanos , Monocitos/patología , Neutrófilos , Linfoma Extranodal de Células NK-T/patología , Estudios Retrospectivos , Linfocitos , Pronóstico
9.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 29(2): 159-62, 2012 Apr.
Artículo en Zh | MEDLINE | ID: mdl-22487824

RESUMEN

OBJECTIVE: To study the expression of RAS protein in human glioma tissues and its influence on tumor growth. METHODS: RAS protein expression in glioma tissues was determined by immunohistochemical (IHC) staining. Subsequently, MTT cell proliferation assay, flow cytometry and Western blotting were used to assay U251 cells with reduced RAS expression. RESULTS: The expression of RAS in glioma was increased and strongly correlated with pathological grade. Downregulation of RAS resulted in glioma cells growth suppression and increased apoptosis. CONCLUSION: The expression level of RAS protein in human glioma was increased. Downregulation of RAS can inhibit glioblastoma cell growth through the RAS signal pathway.


Asunto(s)
Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/patología , Glioma/genética , Glioma/patología , Proteínas ras/biosíntesis , Neoplasias Encefálicas/genética , Procesos de Crecimiento Celular/genética , Línea Celular Tumoral , Regulación hacia Abajo , Humanos , Inmunohistoquímica , Proteínas ras/genética
10.
Science ; 377(6607): eabj6647, 2022 08 12.
Artículo en Inglés | MEDLINE | ID: mdl-35951695

RESUMEN

Postmeiotic spermatids use a unique strategy to coordinate gene expression with morphological transformation, in which transcription and translation take place at separate developmental stages, but how mRNAs stored as translationally inert messenger ribonucleoproteins in developing spermatids become activated remains largely unknown. Here, we report that the RNA binding protein FXR1, a member of the fragile X-related (FXR) family, is highly expressed in late spermatids and undergoes liquid-liquid phase separation (LLPS) to merge messenger ribonucleoprotein granules with the translation machinery to convert stored mRNAs into a translationally activated state. Germline-specific Fxr1 ablation in mice impaired the translation of target mRNAs and caused defective spermatid development and male infertility, and a phase separation-deficient FXR1L351P mutation in Fxr1 knock-in mice produced the same developmental defect. These findings uncover a mechanism for translational reprogramming with LLPS as a key driver in spermiogenesis.


Asunto(s)
Regulación del Desarrollo de la Expresión Génica , Biosíntesis de Proteínas , ARN Mensajero Almacenado , Proteínas de Unión al ARN , Espermátides , Espermatogénesis , Animales , Infertilidad Masculina/genética , Masculino , Ratones , ARN Mensajero Almacenado/genética , ARN Mensajero Almacenado/metabolismo , Proteínas de Unión al ARN/genética , Proteínas de Unión al ARN/metabolismo , Espermátides/crecimiento & desarrollo , Espermátides/metabolismo , Espermatogénesis/genética
11.
Zhonghua Wai Ke Za Zhi ; 49(5): 440-4, 2011 May 01.
Artículo en Zh | MEDLINE | ID: mdl-21733403

RESUMEN

OBJECTIVES: To investigate the function and possible mechanisms of PIAS3 expression on the invasion of TJ905 cells. METHODS: PIAS3 overexpression vectors were constructed and PIAS3 siRNA were chemically synthesized, which were separately transfected into TJ905 cells for upregulation or downregulation of PIAS3 expression levels in TJ905 cells. After that, the invasive effects of TJ905 cells were measured by Transwell assay, and the expression of PIAS3, tissue inhibitor of metalloproteinases (TIMP)3, matrix metalloprotease (MMP)-2, and MMP-9 were identified by Western blot. RESULTS: In vitro transfection efficiency of plasmids and oligonucleotides were separately 85.3% ± 3.1% and 95.1% ± 2.9%. PIAS3 overexpression plasmid transfection in vitro could effectively improve the expression of PIAS3 protein in TJ905 cells and inhibit the invasion of TJ905 cells (P < 0.05), and cell penetration ratio reduced from 87.9% ± 9.3% to 37.3% ± 7.9% compared with control group, while it upregulated TIMP3 and downregulated MMP-2, MMP-9 protein expression (P < 0.05); PIAS3 siRNA transfection could inhibit the PIAS3 protein expression of TJ905 cells and promote the invasion of TJ905 cells (P < 0.05), and cell penetration ratio increased from 83.9% ± 7.1% to 93.2% ± 3.1% compared with control group, while it downregulated TIMP3 and upregulated MMP-2, MMP-9 protein expression (P < 0.05). CONCLUSION: PIAS3 expression is closely related to the invasion properties of glioma TJ905 cells.


Asunto(s)
Glioma/patología , Chaperonas Moleculares/metabolismo , Proteínas Inhibidoras de STAT Activados/metabolismo , Línea Celular Tumoral , Vectores Genéticos , Glioma/metabolismo , Humanos , Metaloproteinasa 2 de la Matriz/metabolismo , Metaloproteinasa 9 de la Matriz/metabolismo , Chaperonas Moleculares/genética , Invasividad Neoplásica , Proteínas Inhibidoras de STAT Activados/genética , ARN Interferente Pequeño/genética , Inhibidor Tisular de Metaloproteinasa-3/metabolismo , Transfección
12.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 27(5): 484-8, 2010 Oct.
Artículo en Zh | MEDLINE | ID: mdl-20931521

RESUMEN

OBJECTIVE: To investigate the role of bone morphogenetic protein 4 (BMP4) on the proliferation and apoptosis in glioma stem cells. METHODS: Stem cells were isolated from a human glioma cell line U87 by using vincristine and characterized by immunofluorescence assay. Proliferation and apoptosis were determined by soft agar colony assay and flow cytometry; Cyclin D1, Bcl-2 and Bax were detected by Western blot analysis. RESULTS: BMP4 inhibited cell proliferation and promoted apoptosis in U87 glioma stem cells. Moreover, Bcl-2 and Cyclin D1 expression were decreased by BMP4, while Bax level was elevated. CONCLUSION: BMP4 can inhibit U87 glioma stem cells proliferation through downregulating Cyclin D1 level, and promote apoptosis through induction of Bax expression and inhibition of Bcl-2 level. It suggests that BMP4 plays an important role in human glioma stem cell biology.


Asunto(s)
Apoptosis , Proteína Morfogenética Ósea 4/metabolismo , Proliferación Celular , Glioma/fisiopatología , Células Madre Neoplásicas/citología , Proteína Morfogenética Ósea 4/genética , Línea Celular Tumoral , Ciclina D1/genética , Ciclina D1/metabolismo , Regulación Neoplásica de la Expresión Génica , Glioma/genética , Glioma/metabolismo , Humanos , Células Madre Neoplásicas/metabolismo , Proteínas Proto-Oncogénicas c-bcl-2/genética , Proteínas Proto-Oncogénicas c-bcl-2/metabolismo
13.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 32(4): 394-7, 2010 Aug.
Artículo en Zh | MEDLINE | ID: mdl-20868596

RESUMEN

OBJECTIVE: To investigate the clinical treatment modality and prognosis of small cell lung cancer(SCLC). METHOD: We retrospectively analyzed the clinical data of 77 SCLC patients who were admitted to our department after 2002. RESULTS: The disease was limited in 43 patients and extensive in 34 patients. For patients with limited SCLC, the 1-year, 2-year, and 5-year survival rate was 80%, 56%, and 21%, respectively. Four patients who had undergone surgical resection were all alive. Among patients who underwent adjuvant chemotherapy followed by radiotherapy, salvage chemotherapy, and salvage chemotherapy followed by radiotherapy, the median of survival period was 51 months, 12 months, and 28 months, respectively. For patients with extensive SCLC, the 1-year and 2-year survival rate was 56% and 25%, respectively. The median of survival period was 14.3 months. Stage was an independent factor in multifactor COX regression. Monofactor COX regression showed that radiotherapy and resection were factors correlated with survival. Brain metastasis had no impact on survival. CONCLUSIONS: Chemotherapy followed by radiotherapy is preferred for limited SCLC, while surgical resection remains questionable for early-stage patients. For extensive SCLC, multi-line chemotherapy may be helpful to improve the overall survival. Stage is an independent factor for predicting the prognosis.


Asunto(s)
Carcinoma de Células Pequeñas/terapia , Neoplasias Pulmonares/terapia , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma de Células Pequeñas/diagnóstico , Femenino , Estudios de Seguimiento , Humanos , Neoplasias Pulmonares/diagnóstico , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Análisis de Supervivencia
14.
Cancer Med ; 9(14): 5086-5094, 2020 07.
Artículo en Inglés | MEDLINE | ID: mdl-32459060

RESUMEN

The objective of this study was to predict the value of lymphocyte subsets in cancer progression. Peripheral blood was obtained from 327 untreated patients with cancer and 158 healthy volunteers. Levels of lymphocyte subsets were determined by flow cytometry. There were decreased levels of natural killer (NK) cells, CD8+ T cells, and naïve CD4+ /CD4+ T cells in untreated patients with cancer compared to those in healthy controls. Inversely, there were elevated levels of the following T-cell percentages in cancer patients compared to those in healthy controls: memory CD4+ /CD4+ , CD8+ T cells, HLA-DR/CD8+ , CD8+ CD38+ /CD8+ , and CD4+ /CD8+ . In addition, there are a decreasing trend in terms of CD4+ T-cell counts and an increase CD8+ HLA-DR/CD8+ T-cell and CD8+ CD38+ /CD8+ T-cell percentages in the advanced stage. An increasing trend with advanced tumor stage and the percentages of CD8+ HLA-DR/CD8+ T cells and CD8+ CD38+ /CD8+ T cells was shown in this study. There are a negative correlation for CD4+ T-cell counts and positive correlation for percentages of CD8+ HLA-DR/CD8+ T cell and CD8+ CD38+ /CD8+ T cells with the lymph node metastasis. In the presence of distant metastatic spread, we observed higher NK-cell counts, CD8+ HLA-DR/CD8+ T-cell percentages, CD8+ CD38+ /CD8+ T-cell percentages, as well as lower CD4+ T-cell counts than those in the absence of distant metastases spread. Abnormal levels of NK cell, CD8+ T cells, memory CD4+ /CD4+ , naïve CD4+ / CD4+ , CD8+ HLA-DR/CD8+ , CD8+ CD38+ /CD8+ , and CD4+ /CD8+ can be a potential blood biomarkers of cancer development. CD4+ T-cell counts and percentages of CD8+ HLA-DR/ CD8+ and CD8+ CD38+ / CD8+ can predict the cancer progression.


Asunto(s)
Biomarcadores de Tumor/metabolismo , Recuento de Linfocitos/métodos , Linfocitos/metabolismo , Neoplasias/sangre , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Progresión de la Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Microambiente Tumoral , Adulto Joven
15.
Huan Jing Ke Xue ; 39(1): 379-388, 2018 Jan 08.
Artículo en Zh | MEDLINE | ID: mdl-29965705

RESUMEN

Topsoil (0-20 cm) samples (n=101) in 5 different land use types in Shenyang North New Area (SNNA), Shenyang, China were collected using the uniform grid layout method to investigate the spatial distribution characteristics, composition spectrum, and source analysis of 16 polycyclic aromatic hydrocarbons (PAHs) listed as priority pollutants by the Environmental Protection Agency of the United States. Results showed that the total concentration of the 16 PAHs (ΣPAHs) in soils of SNNA ranged from 123.7 µg·kg-1 to 932.5 µg·kg-1. The PAH components were mainly dominated by 3-ring and 4-ring PAHs, of which the proportion of 3-ring PAHs was the highest. The spatial distribution of the ΣPAHs concentration was obvious, showing a decreasing tendency from south to north and from east to west. In the five soil types, the average concentrations of the ΣPAHs were relatively higher in the urban green space and the artificial forest, followed by the vegetable land, while the total PAH concentrations in paddy fields and corn fields were relatively lower and had no obvious spatial distribution differences. Source apportionment results studied using characteristic ratio analysis and factor analysis/multivariate linear regression showed that the main sources of PAHs in the topsoil of SNNA were mixed sources. Industrial coal combustion and motor vehicle exhaust were the main PAH contributors, with a combined contribution rate of 79.6%. The oil spill and coke oven contribution rate was about 16.2%, and the biomass fuel combustion was about 4.2%.

16.
Arch Med Res ; 49(4): 219-225, 2018 05.
Artículo en Inglés | MEDLINE | ID: mdl-30269965

RESUMEN

Hepatic injury is a major event in liver surgery and may lead to liver cell apoptosis. Nitric oxide (NO) is an unstable, carbon-centered radical with a short half-time and a key role in molecular signaling. Increasing evidence demonstrates that NO plays an important role in the liver cell apoptosis caused by hepatic ischemia reperfusion (IR) injury and other liver damage. Our recent article summarized the association between elevated nitric oxide levels and hepatic cell apoptosis during liver injury. This article reviews the newest research progress for the relationship between decreased nitric oxide levels and hepatic cell apoptosis inhibition during liver injury. It is shown that decreased NO level can influence liver apoptosis by promoting or inhibiting the signaling pathway involving the caspase family, BCL-2, mitochondria, oxidative stress, death receptors, and mitogen activated protein kinases, etc. This review outlines the literature basis for clinical application of anti-apoptosis treatment to relieve organ injury following liver surgery. NO-related drugs appear to be helpful in clinical treatment of liver diseases.


Asunto(s)
Apoptosis/fisiología , Hepatopatías/patología , Hígado/lesiones , Óxido Nítrico/metabolismo , Daño por Reperfusión/patología , Animales , Caspasas/metabolismo , Humanos , Hígado/patología , Masculino , Estrés Oxidativo , Transducción de Señal
17.
Oncotarget ; 8(32): 52802-52812, 2017 Aug 08.
Artículo en Inglés | MEDLINE | ID: mdl-28881772

RESUMEN

Considering the general application of dedicated small-animal positron emission tomography/computed tomography is limited, an acceptable alternative in many situations might be clinical PET/CT. To estimate the feasibility of using clinical PET/CT with [F-18]-fluoro-2-deoxy-D-glucose for high-resolution dynamic imaging and quantitative analysis of cancer xenografts in nude mice. Dynamic clinical PET/CT scans were performed on xenografts for 60 min after injection with [F-18]-fluoro-2-deoxy-D-glucose. Scans were reconstructed with or without SharpIR method in two phases. And mice were sacrificed to extracting major organs and tumors, using ex vivo γ-counting as a reference. Strikingly, we observed that the image quality and the correlation between the all quantitive data from clinical PET/CT and the ex vivo counting was better with the SharpIR reconstructions than without. Our data demonstrate that clinical PET/CT scanner with SharpIR reconstruction is a valuable tool for imaging small animals in preclinical cancer research, offering dynamic imaging parameters, good image quality and accurate data quatification.

18.
Water Res ; 40(7): 1367-76, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16545860

RESUMEN

A combined neural network and genetic algorithm (GA) was developed for water quality management of Feitsui Reservoir in Taiwan. First, an artificial neural network (ANN) model was employed to simulate the behavior of nutrient loads into the reservoir. The data from watershed loads, precipitation in the watershed, and outflow were used in the ANN model to forecast the total phosphorus concentration in the reservoir. A 6-year (1992-97) record of water quality data was used for network training, and additional data collected in 1998-2000 were used for model verification. Further, a GA was used with this ANN model to optimize the control of nutrient loads from the watershed. The GA was used as a search strategy to determine the proper reduction rates of nutrient loads from the watershed so that the objective function could be as close to the optimal value as possible. The study results indicate that the ANN model can effectively simulate the dynamics of reservoir water quality. The GA is able to identify control schemes that reduce the in-reservoir total phosphorus concentration by as much as 60%, and water quality in the reservoir can be expected to achieve an oligotrophic (most of the time) or mesotrophic level if the watershed nutrient loads are reduced by 10-80%.


Asunto(s)
Algoritmos , Redes Neurales de la Computación , Abastecimiento de Agua/normas , Simulación por Computador , Predicción/métodos , Fósforo/análisis , Contaminantes Químicos del Agua/análisis , Contaminación del Agua
19.
Medicine (Baltimore) ; 95(16): e3395, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-27100426

RESUMEN

The purpose of this study was to evaluate the prognostic value of lymph node ratio (LNR) in patients with gastric cancer liver metastasis (GCLM) who received combined surgical resection. A retrospective analysis of 46 patients from two hospitals was conducted. Patients were dichotomized into two groups (high LNR and low LNR) by the median value of LNR. The overall survival (OS) and recurrence-free survival (RFS) were analyzed by the Kaplan-Meier method with the log-rank test. The Cox proportional hazard model was used to carry out the subsequent multivariate analyses. And the relationship between LNR and clinicopathological characteristics was assessed. The cut-off value defining elevated LNR was 0.347. With a median follow-up of 67.5 months, the median OS and RFS of the patients were 17 and 9.5 months, respectively. Six patients survived for >5 years after surgery. Patients with higher LNR had significantly shorter OS and RFS than those with lower LNR. In the multivariate analyses, higher LNR and multiple liver metastatic tumors were identified as the independent prognostic factors for both OS and RFS. Elevated LNR was significantly associated with advanced pN stage (P <0.001), larger primary tumor size (P = 0.046), the presence of microvascular invasion (P = 0.008), and neoadjuvant chemotherapy (P = 0.004). LNR may be prognostic indicator for patients with GCLM treated by synchronous surgical resection. Patients with lower LNR and single liver metastasis may gain more survival benefits from the surgical resection. Further prospective studies with reasonable study design are warranted.


Asunto(s)
Adenocarcinoma/secundario , Neoplasias Hepáticas/cirugía , Escisión del Ganglio Linfático/métodos , Ganglios Linfáticos/patología , Neoplasias Gástricas/patología , Adenocarcinoma/epidemiología , Adenocarcinoma/cirugía , Adulto , Anciano , Supervivencia sin Enfermedad , Endosonografía , Femenino , Estudios de Seguimiento , Gastroscopía , Humanos , Incidencia , Neoplasias Hepáticas/epidemiología , Neoplasias Hepáticas/secundario , Ganglios Linfáticos/cirugía , Metástasis Linfática , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/epidemiología , Estudios Retrospectivos , Neoplasias Gástricas/epidemiología , Neoplasias Gástricas/cirugía , Tasa de Supervivencia/tendencias , Factores de Tiempo
20.
CNS Neurosci Ther ; 20(4): 339-43, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24393335

RESUMEN

BACKGROUND: Gliomas are the most lethal type of primary brain tumor in adult. Long noncoding RNAs (lncRNAs), which are involved in the progression of various cancers, may offer a potential gene therapy target in glioma. METHODS AND FINDINGS: We first classified gliomas into three molecular subtypes (namely LncR1, LncR2 and LncR3) in Rembrandt dataset using consensus clustering. Survival analysis indicated that LncR3 had the best prognosis, while the LncR1 subtype showed the poorest overall survival rate. The results were further validated in an independent glioma dataset GSE16011. Additionally, we collected and merged data of the two databases (Rembrandt and GSE16011 dataset) and analyzed prognosis of each subtype in WHO II, III and IV gliomas. The similar results were obtained. Gene Set Variation Analysis (GSVA) demonstrated that LncR1 subtype enriched cultured astroglia's gene signature, while LncR2 subtype was characterized by neuronal gene signature. Oligodendrocytic was rich in LncR3. In addition, IDH1 mutation and 1p/19q LOH were found rich with LncR3, and EGFR amplification showed high percentage in LncR1 in GSE16011 dataset. CONCLUSIONS: We report a novel molecular classification of glioma based on lncRNA expression profiles and believe that it would provide a potential platform for future studies on gene treatment for glioma and lead to more individualized therapies to improve survival rates.


Asunto(s)
Neoplasias Encefálicas/diagnóstico , Neoplasias Encefálicas/metabolismo , Glioma/diagnóstico , Glioma/metabolismo , ARN Largo no Codificante/metabolismo , Transcriptoma , Astrocitos/metabolismo , Astrocitoma/diagnóstico , Astrocitoma/metabolismo , Astrocitoma/patología , Neoplasias Encefálicas/patología , Células Cultivadas , Análisis por Conglomerados , Bases de Datos Genéticas , Regulación Neoplásica de la Expresión Génica , Glioblastoma/diagnóstico , Glioblastoma/metabolismo , Glioblastoma/patología , Glioma/patología , Humanos , Estimación de Kaplan-Meier , Análisis por Micromatrices , Estadificación de Neoplasias , Neuronas/metabolismo , Oligodendroglía/metabolismo , Oligodendroglioma/diagnóstico , Oligodendroglioma/metabolismo , Oligodendroglioma/patología , Pronóstico , ARN Largo no Codificante/genética , Análisis de Supervivencia
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