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1.
Sci Rep ; 9(1): 13788, 2019 Sep 24.
Artigo em Inglês | MEDLINE | ID: mdl-31551510

RESUMO

Methods for estimating the spatial distribution of PM2.5 concentrations have been developed but have not yet been able to effectively include spatial correlation. We report on the development of a spatial back-propagation neural network (S-BPNN) model designed specifically to make such correlations implicit by incorporating a spatial lag variable (SLV) as a virtual input variable. The S-BPNN fits the nonlinear relationship between ground-based air quality monitoring station measurements of PM2.5, satellite observations of aerosol optical depth, meteorological synoptic conditions data and emissions data that include auxiliary geographical parameters such as land use, normalized difference vegetation index, elevation, and population density. We trained and validated the S-BPNN for both yearly and seasonal mean PM2.5 concentrations. In addition, principal components analysis was employed to reduce the dimensionality of the data and a grid of neural network models was run to optimize the model design. The S-BPNN was cross-validated against an analogous but SLV-free BPNN model using the coefficient of determination (R2) and root mean squared error (RMSE) as statistical measures of goodness of fit. The inclusion of the SLV led to demonstrably superior performance of the S-BPNN over the BPNN with R2 values increasing from 0.80 to 0.89 and with the RMSE decreasing from 8.1 to 5.8 µg/m3. The yearly mean PM2.5 concentration in China during the study period was found to be 41.8 µg/m3 and the model estimated spatial distribution was found to exceed Level 2 of the China Ambient Air Quality Standards (CAAQS) enacted in 2012 (>35 µg/m3) in more than 70% of the Chinese territory. The inclusion of spatial correlation upgrades the performance of conventional BPNN models and provides a more accurate estimation of PM2.5 concentrations for air quality monitoring.

2.
J Craniofac Surg ; 29(5): 1322-1326, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29481507

RESUMO

The aim of this study was to explore the application and efficacy of personalized digital guiding plate-aided radiofrequency in treating trigeminal neuralgia (TN). A total of 117 cases (93 patients) of TN from January 2015 to December 2016 were divided into the study group (n = 53) and the traditional group (n = 64). Patients in the study group were treated by the radiofrequency through a personalized digital guiding plate, whereas those in the traditional group were treated by the traditional method. We found that no significant difference between these 2 groups in age, sex, and divisions affected (V2, V3). However, the values for operation time, recurrence rate, and patient's satisfaction in the plate assisted group were significantly improved compared with those in the traditional group. Therefore, the personalized digital guiding plate-assisted radiofrequency has higher application value than traditional method.


Assuntos
Placas Ósseas , Denervação/instrumentação , Neuronavegação/instrumentação , Impressão Tridimensional , Tomografia Computadorizada por Raios X/instrumentação , Neuralgia do Trigêmeo/terapia , Idoso , Denervação/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neuronavegação/métodos , Recidiva , Temperatura Ambiente , Tomografia Computadorizada por Raios X/métodos , Resultado do Tratamento
3.
J Dermatol Sci ; 88(1): 103-109, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28551095

RESUMO

BACKGROUND: Vitiligo is an autoimmune disease, characterized by progressive loss of skin pigmentation, which is caused by the interactions of multiple factors, such as heredity, immunity and environment. Recently, a single nucleotide polymorphism (SNP) rs638893 at 11q23.3 region was identified as a risk factor for vitiligo in genome-wide association studies and multiple SNPs in this region have been associated with other autoimmune diseases. OBJECTIVE: This study aims to identify additional susceptibility variants associated with vitiligo at 11q23.3 in the Chinese Han population. METHODS: We selected and genotyped 26 SNPs at 11q23.3 in an independent cohort including 2924 cases and 4048 controls using the Sequenom MassArray iPLEX® system. Bonferroni adjustment was used for multiple comparisons and P value <1.92×10-3 (0.05/26) was considered statistically significant. RESULTS: The A allele of rs613791 and G allele of rs523604 located in CXCR5 were observed to be significantly associated with vitiligo (OR=1.21, 95% CI: 1.11-1.31, P=1.20×10-5; OR=1.14, 95% CI: 1.07-1.23, P=1.90×10-4, respectively). The C allele of rs638893 (a previously reported one) located upstream of DDX6 was also significantly associated with vitiligo (OR=1.25, 95% CI: 1.12-1.38, P=3.04×10-5). The genotypes distribution of 3 SNPs also showed significant differences between case and control (rs613791: P=7.00×10-6, rs523604: P=4.00×10-3, rs638893: P=1.20×10-5, respectively). The two newly identified SNPs (rs613791 and rs523604) showed independent associations with vitiligo by linkage disequilibrium analysis and conditional logistic regression. CONCLUSIONS: The study identified two new independent signals in the associated locus 11q23.3 for vitiligo. The presence of multiple independent variants emphasizes an important role of this region in disease susceptibility.


Assuntos
Grupo com Ancestrais do Continente Asiático/genética , Doenças Autoimunes/genética , Cromossomos Humanos Par 11/genética , Predisposição Genética para Doença , Receptores CXCR5/genética , Vitiligo/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Alelos , Criança , Pré-Escolar , Feminino , Estudo de Associação Genômica Ampla , Genótipo , Técnicas de Genotipagem/métodos , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase Multiplex , Análise de Sequência com Séries de Oligonucleotídeos , Polimorfismo de Nucleotídeo Único , Adulto Jovem
4.
Nat Genet ; 48(7): 740-6, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-27213287

RESUMO

The human major histocompatibility complex (MHC) region has been shown to be associated with numerous diseases. However, it remains a challenge to pinpoint the causal variants for these associations because of the extreme complexity of the region. We thus sequenced the entire 5-Mb MHC region in 20,635 individuals of Han Chinese ancestry (10,689 controls and 9,946 patients with psoriasis) and constructed a Han-MHC database that includes both variants and HLA gene typing results of high accuracy. We further identified multiple independent new susceptibility loci in HLA-C, HLA-B, HLA-DPB1 and BTNL2 and an intergenic variant, rs118179173, associated with psoriasis and confirmed the well-established risk allele HLA-C*06:02. We anticipate that our Han-MHC reference panel built by deep sequencing of a large number of samples will serve as a useful tool for investigating the role of the MHC region in a variety of diseases and thus advance understanding of the pathogenesis of these disorders.


Assuntos
Grupo com Ancestrais do Continente Asiático/genética , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Complexo Principal de Histocompatibilidade/genética , Polimorfismo de Nucleotídeo Único/genética , Psoríase/genética , Butirofilinas/genética , Estudos de Casos e Controles , China/epidemiologia , Predisposição Genética para Doença , Antígenos HLA-B/genética , Antígenos HLA-C/genética , Cadeias beta de HLA-DP/genética , Humanos , Psoríase/epidemiologia
5.
Immunogenetics ; 67(7): 347-54, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25952005

RESUMO

Generalized vitiligo is an autoimmune disease characterized by melanocyte loss, which results in patchy depigmentation of skin and hair, and is associated with an elevated risk of other immune-related diseases. However, there is no reported study on the associations between immune susceptibility polymorphisms and the risk of vitiligo with immune-related diseases. The aim of this study was to evaluate the potential influence of 10 single-nucleotide polymorphisms (SNPs) at 18q21.31 (rs10503019), 4p16.1 (rs11940117), 3q28 (rs1464510), 14q12 (rs2273844), 12q13.2 (rs2456973), 16q12.2 (rs3213758), 10q25.3 (rs4353229), 3q13.33 (rs59374417), and 10p15.1 (rs706779 and rs7090530) on vitiligo with immune-related diseases in the Chinese Han population. All SNPs were genotyped in 552 patients with vitiligo-associated immune-related diseases and 1656 controls using the Sequenom MassArray system. Data were analyzed with PLINK 1.07 software. The C allele of rs2456973 at 12q13.2 was observed to be significantly associated with vitiligo-associated immune-related diseases (autoimmune diseases and allergic diseases) (P = 0.0028, odds ratio (OR) = 1.27). In subphenotype analysis, the rs2456973 C allele was also significantly associated with early-onset vitiligo by comparing with controls (P = 0.0001) and in the case-only analysis (P = 0.0114). We confirmed that 12q13.2 was an important candidate locus for vitiligo with immune-related diseases (autoimmune diseases and allergic diseases) and affected disease phenotypes with early onset.


Assuntos
Doenças Autoimunes/genética , Aberrações Cromossômicas , Cromossomos Humanos Par 12/genética , Hipersensibilidade/genética , Vitiligo/genética , Adulto , Grupo com Ancestrais do Continente Asiático/genética , Estudos de Casos e Controles , China , Feminino , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Masculino , Polimorfismo de Nucleotídeo Único
6.
Wei Sheng Yan Jiu ; 33(2): 208-10, 2004 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-15209008

RESUMO

OBJECTIVE: To study the injury effect of ammonium perchlorate (AP) to lung and to explore whether AP can cause pulmonary fibrosis. METHODS: To detect the levels of cell counts, TNF-alpha, MDA, HYP and the synthesis of collagen in BALF or rat lung after a certain time when rats were injected AP by intratracheal instillation. RESULTS: AP could bring about acute lung damage and inflammatory reaction. The levels of TNF-alpha of different groups in different time were obviously higher than the normal control group(P < 0.05). AP could affect the levels of MDA, HYP and the synthesis of collagen. But it had no obviously pathological change of pulmonary fibrosis. CONCLUSION: There were acute injury effect about AP to lung, but this experiment could not make sure whether AP could cause pulmonary fibrosis.


Assuntos
Pulmão/patologia , Percloratos/toxicidade , Fibrose Pulmonar/induzido quimicamente , Compostos de Amônio Quaternário/toxicidade , Animais , Líquido da Lavagem Broncoalveolar/química , Feminino , Hidroxiprolina/análise , Pulmão/metabolismo , Malondialdeído/análise , Ratos , Ratos Wistar , Fator de Necrose Tumoral alfa/análise
7.
Artigo em Chinês | MEDLINE | ID: mdl-14761346

RESUMO

OBJECTIVE: To study the effects of toxicity of ammonium perchlorate (AP) on thyroid of rats. METHODS: Eighty-eight Wistar rats were treated orally with different dosages of AP. Three treated groups received 129, 257, 514 mg.kg(-1).d(-1) of AP respectively and one control group drunk water for 13 weeks. Another 3 groups received 1.2, 46.5, 465.0 mg.kg(-1).d(-1) of AP respectively and one control group drunk water for 36 weeks. The behavior and change of body weight in rats were observed. The levels of thyroid hormones in serum were measured and the pathological changes of thyroid tissue were observed as well. RESULTS: There were no differences in behavior and change of body weight between different AP exposure time. When the rats were treated with AP 514 mg for 13 weeks, free triiodothyronine (FT3, 2.48 pmol/L), free thyroxin (FT4, 13.33 pmol/L) were lower than those in control group (3.24, 20.92 pmol/L respectively, P<0.05). Thyroid-stimulating hormone (TSH, 0.375 mIU/L), thyroglobulin (TG, 3.37 microg/L) were higher than those in control group (0.29 mIU/L, 2.00 microg/L respectively, P<0.05). When the rats were treated with AP 465 mg for 36 weeks, FT3 (2.65 pmol/L) was lower than that in control group (4.97 pmol/L, P<0.01). FT4 in 46.5, 465 mg groups (10.63, 2.17 pmol/L respectively) were lower than that in control group (15.74 pmol/L, P<0.05, P<0.01). TSH in 465 mg group (0.34 mIU/L) was higher than that in control group (0.14 mIU/L, P<0.05). Histopathologic examination showed that follicle proliferation, no colloid in follicle, gore, follicular diminishing or atresia were found in 46.5, 465 mg groups with a dose-effect relationship. CONCLUSIONS: The toxic effects of AP on the growth of rats were not found, but those on the thyroid of rats were found significantly. Thyroid is the target organ of AP. It is considered that none effect dose of AP for rat thyroid may be 1.2 mg.kg(-1).d(-1), its threshold dose may be 46.5 mg.kg(-1).d(-1).


Assuntos
Percloratos/toxicidade , Compostos de Amônio Quaternário/toxicidade , Glândula Tireoide/efeitos dos fármacos , Animais , Relação Dose-Resposta a Droga , Feminino , Masculino , Ratos , Ratos Wistar , Glândula Tireoide/patologia , Hormônios Tireóideos/sangue , Tireotropina/sangue
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