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1.
J Phys Chem Lett ; 15(38): 9575-9584, 2024 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-39269336

RESUMO

Ligand engineering of aromatic heterocyclic cations in two-dimensional (2D) Dion-Jacobson (DJ) perovskites has been widely explored in recent years. In this study, how the positional isomers of aromatic heterocyclic cations tune the lattice of 2D perovskites, thereby influencing the transport and recombination dynamics of charge carriers, has been investigated through nonadiabatic molecular dynamics simulations. We demonstrate that the meta-substituted 3-(aminomethyl)pyridinium (3AMPY) cations greatly reduce the strength of electron-vibration coupling since the strong hydrogen-bonding network introduced by the changes in the arrangement of spacer cations significantly suppresses the structural thermal fluctuations. Compared to the para-substituted 4-(aminomethyl)pyridinium (4AMPY) cation, using the asymmetric 3AMPY as a spacer cation can achieve improved in-plane transport performance, enhanced thermal stability, and suppressed charge carrier recombination through weakening electron-vibration interactions. Our results explain the observed lifetime difference between the two types of DJ-phase perovskites in experiments and provide new guidance for optimizing the performance of perovskite devices.

2.
Asian J Androl ; 25(4): 505-511, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36510861

RESUMO

In the recent decades, obesity rates among children and adolescents, especially males, have increased significantly. This worldwide phenomenon is thought to significantly affect the levels of sex hormones. However, the association between waist circumference (a marker of abdominal obesity) and sex hormone levels in children and adolescents is unknown. In this study, 4031 participants aged 6-19 years from the United States National Health and Nutrition Examination Survey (NHANES) in the USA were enrolled in this study. The common confounders of age, race, body mass index, educational level, family income, diabetes, and time of sample collection were also collected. The participants missing any of the above information were excluded from the study. We used multiple linear regression and other multiple statistics to assess the associations between waist circumference and serum testosterone, estradiol, sex hormone-binding globulin (SHBG), free androgen index (FAI), and testosterone/estradiol ratio (T/E2). Waist circumference remained associated with sex hormone levels in children and adolescents after controlling for covariates. As waist circumference increases, testosterone levels in children and adolescents show an overall decline after a brief increase, with the inflection point for waist circumference of 65-66 cm. In addition, waist circumference positively correlates with estradiol levels in male children (ß = 0.007, 95% confidence interval: 0.004-0.009). Moreover, circulating SHBG decreases in children and adolescents as waist circumference increases. In conclusion, this study highlighted waist circumference as a vital indicator affecting sex hormone levels in children and adolescents.


Assuntos
Estradiol , Hormônios Esteroides Gonadais , Humanos , Masculino , Adolescente , Criança , Estados Unidos/epidemiologia , Inquéritos Nutricionais , Circunferência da Cintura , Testosterona , Obesidade , Globulina de Ligação a Hormônio Sexual
3.
Clin Respir J ; 16(5): 369-379, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35522050

RESUMO

BACKGROUND: The aim of the present study is to investigate the clinical value and characteristics of peripheral blood lymphocyte subsets in patients with pulmonary tuberculosis (PTB) using flow cytometry. METHODS: The absolute counts of T, CD4+ T, CD8+ T, natural killer (NK), NKT and B lymphocytes in 217 cases of PTB were detected, and the variations in lymphocyte subset counts between different ages and genders and between aetiological detection results and chest radiography results were analysed. RESULTS: In 75.3% of the patients with PTB, six subset counts were lower than the normal reference range, and 44% showed lower-than-normal CD4+ T lymphocyte levels. The counts of T, CD4+ T, CD8+ T and B lymphocytes were significantly lower in patients aged >60 years, and the NKT cell counts were significantly lower in female patients than in male patients. Among the patients with positive aetiological results, 40.8% had reduced CD8+ T counts; these were significantly lower than those in patients with negative aetiological results (P = 0.0295). The cell counts of T, CD4+ T, CD8+ T and B lymphocytes reduced as lesion lobe numbers increased. The counts of T, CD4+ T and CD8+ T lymphocytes were significantly higher in the group with lesions affecting one lobe than in the groups with two to three lobes or four to five lobes, and the counts of B lymphocytes were significantly higher in the group with one lobe and the group with two to three lobes than in the group with four to five lobes. The counts of CD4+ T and CD8+ T lymphocytes were highest in the no cavity group and showed a downward trend with the increase in cavities; the T lymphocyte count was significantly higher in the no cavity group than in the group with five or more cavities (P = 0.014), and the CD8+ T lymphocyte count was significantly higher in the no cavity group than in the group with one to two cavities and the group with five or more cavities (P = 0.001 and 0.01, respectively). CONCLUSIONS: In most patients with tuberculosis, immune function is impaired. The absolute counts of peripheral blood lymphocyte subsets are closely related to the aetiological results and lesion severity in patients with PTB; this could be used as evidence for immune intervention and monitoring curative effects.


Assuntos
Subpopulações de Linfócitos , Tuberculose Pulmonar , Linfócitos B , Feminino , Humanos , Contagem de Linfócitos , Masculino , Subpopulações de Linfócitos T , Linfócitos T
4.
Sci Adv ; 8(8): eabe8828, 2022 02 25.
Artigo em Inglês | MEDLINE | ID: mdl-35196094

RESUMO

The preference for social novelty is crucial to the social life of humans and rodents. However, the neural mechanisms underlying social novelty preference are poorly understood. Here, we found that chronic social defeat stress (CSDS) reduced the preference for social novelty in mice by impairing the response of CaMKIIα+ neurons in the CA3 region of dorsal hippocampus (dCA3) during approach to an unfamiliar mouse. The deficits of social novelty preference in CSDS-treated mice were reversed by activating the output from dCA3 to the GABAergic neurons in the lateral septum (LS). The activation of GABAergic projection from LS recruited a circuit that inhibited the Foxb1+ neurons in the parvafox nucleus (PFN), which drove social avoidance by projecting to the lateral periaqueductal gray (lPAG). These results suggest that a previously unidentified circuit of dCA3CaMKIIα+→LSGABA+→PFNFoxb1+→lPAG mediates the deficits of social novelty preference induced by CSDS.


Assuntos
Derrota Social , Estresse Psicológico , Animais , Fatores de Transcrição Forkhead , Neurônios GABAérgicos , Hipocampo , Camundongos , Camundongos Endogâmicos C57BL , Comportamento Social
5.
J Healthc Eng ; 2022: 1147545, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36591111

RESUMO

Background: Tumor cells with a hybrid metabolic state, in which glycolysis and oxidative phosphorylation (OXPHOS) can be used, usually have a strong ability to adapt to different stress environments due to their metabolic plasticity. However, few studies on tumor cells with this phenotype have been conducted in the field of renal cell carcinoma (RCC). Methods: The metabolic pathway (glycolysis, OXPHOS) related gene sets were obtained from the Molecular Signatures Database (V7.5.1). The gene expression matrix, clinical information, and mutation data were obtained by Perl programming language (5.32.0) mining, the Cancer Genome Atlas and International Cancer Genome Consortium database. Gene Set Enrichment Analysis (GSEA) software (4.0.3) was utilised to analyse glycolysis-related gene sets. Analysis of survival, immune infiltration, mutation, etc. was performed using the R programming language (4.1.0). Results: Eight genes that are highly associated with glycolysis and OXHPOS were used to construct the cox proportional hazards model, and risk scores were calculated based on this to predict the prognosis of clear cell RCC patients and to classify patients into risk groups. Gene Ontology, the Kyoto Encyclopaedia of Genes and Genomes, and GSEA were analysed according to the differential genes to investigate the signal pathways related to the hybrid metabolic state. Immunoinfiltration analysis revealed that CD8+T cells, M2 macrophages, etc., had significant differences in infiltration. In addition, the analysis of mutation data showed significant differences in the number of mutations of PBRM1, SETD2, and BAP1 between groups. Cell experiments demonstrated that the DLD gene expression was abnormally high in various tumor cells and is associated with the strong migration ability of RCC. Conclusions: We successfully constructed a risk score system based on glycolysis and OXPHOS-related genes to predict the prognosis of RCC patients. Bioinformatics analysis and cell experiments also revealed the effect of the hybrid metabolic activity on the migration ability and immune activity of RCC and the possible therapeutic targets for patients.


Assuntos
Carcinoma de Células Renais , Neoplasias Renais , Humanos , Carcinoma de Células Renais/genética , Prognóstico , Biologia Computacional , Fenótipo , Neoplasias Renais/genética
6.
BMC Infect Dis ; 21(1): 1015, 2021 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-34583653

RESUMO

BACKGROUND: The morbidity of rifampicin/multidrug-resistant tuberculous meningitis (RR/MDR-TBM) has shown an increasing trend globally. Its mortality rate is significantly higher than that of non-rifampicin/multidrug-resistant tuberculous meningitis (NRR/MDR-TBM). This article aimed to explore risk factors related to RR/MDR-TBM, and compare therapeutic effects of linezolid (LZD)- and non-linezolid-containing regimen for RR/MDR-TB patients in Shenzhen city. Furthermore, we aimed to find a better therapy for pathogen-negative TBM with RR/MDR-TBM related risk factors. METHODS: We conducted a retrospective study enrolling 137 hospitalized cases with confirmed TBM from June 2014 to March 2020. All patients were divided into RR/MDR-TBM group (12 cases) and NRR/MDR-TBM group (125 cases) based on GeneXpert MTB/RIF and (or) phenotypic drug susceptibility test results using cerebral spinal fluid (CSF). The risk factors related to RR/MDR-TBM were investigated through comparing clinical and examination features between the two groups. The mortality rate of RR/MDR-TBM patients treated with different regimens was analyzed to compare their respective therapeutic effects. A difference of P < 0.05 was considered statistically significant. RESULTS: Most patients (111/137, 81%) were from southern or southwestern China, and a large proportion (72/137, 52.55%) belonged to migrant workers. 12 cases were RR/MDR-TBM (12/137, 8.8%) while 125 cases were NRR/MDR-TBM (125/137, 91.2%). The proportion of patients having prior TB treatment history in the RR/MDR-TBM group was significantly higher than that of the NRR/MDR-TBM group (6/12 vs. 12/125, 50% vs. 10.5%, P < 0.01). No significant difference was observed on other clinical and examination features between the two groups. Mortality was significantly lower in RR/MDR-TBM patients on linezolid-containing treatment regimen than those who were not (0/7 versus 3/5, 0% versus 60%, P = 0.045). CONCLUSIONS: The main related risk factor of RR/MDR-TBM is the history of anti-tuberculosis treatment. Linezolid-containing regimen appears to lower mortality rate of RR/MDR-TBM significantly in our study. We think Linezolid should be evaluated prospectively in the treatment of RR/MDR-TBM.


Assuntos
Mycobacterium tuberculosis , Tuberculose Meníngea , Tuberculose Resistente a Múltiplos Medicamentos , Antituberculosos/uso terapêutico , China/epidemiologia , Humanos , Linezolida/uso terapêutico , Estudos Retrospectivos , Rifampina/uso terapêutico , Tuberculose Meníngea/tratamento farmacológico , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico
7.
Cancer Med ; 10(18): 6384-6401, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34382349

RESUMO

With the widespread use of PD-1/PD-L1 monoclonal antibodies (mAbs) in the treatment of multiple malignant tumors, they were also gradually applied to advanced renal cell carcinoma (aRCC). Nowadays, multiple PD-1/PD-L1 mAbs, such as nivolumab, avelumab, and pembrolizumab, have achieved considerable efficacy in clinical trials. However, due to the primary, adaptive, and acquired resistance to these mAbs, the efficacy of this immunotherapy is not satisfactory. Theories also vary as to why the difference in efficacy occurs. The alterations of PD-L1 expression and the interference of cellular immunity may affect the efficacy. These mechanisms demand to be revealed to achieve a sustained and complete objective response in patients with aRCC. Tyrosine kinase inhibitors have been proven to have synergistic mechanisms with PD-1/PD-L1 mAb in the treatment of aRCC, and CTLA-4 mAb has been shown to have a non-redundant effect with PD-1/PD-L1 mAb to enhance efficacy. Although combinations with targeted agents or other checkpoint mAbs have yielded enhanced clinical outcomes in multiple clinical trials nowadays, the potential of PD-1/PD-L1 mAbs still has a large development space. More potential mechanisms that affect the efficacy demand to be developed and transformed into the clinical treatment of aRCC to search for possible combination regimens. We elucidate these mechanisms in RCC and present existing combination therapies applied in clinical trials. This may help physicians' select treatment options for patients with refractory kidney cancer.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Renais/tratamento farmacológico , Inibidores de Checkpoint Imunológico/uso terapêutico , Neoplasias Renais/tratamento farmacológico , Receptor de Morte Celular Programada 1/antagonistas & inibidores , Inibidores de Proteínas Quinases/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Antígeno B7-H1/antagonistas & inibidores , Antígeno B7-H1/metabolismo , Carcinoma de Células Renais/diagnóstico , Carcinoma de Células Renais/imunologia , Carcinoma de Células Renais/mortalidade , Linhagem Celular Tumoral , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Resistencia a Medicamentos Antineoplásicos/genética , Resistencia a Medicamentos Antineoplásicos/imunologia , Ensaios de Seleção de Medicamentos Antitumorais , Epigênese Genética , Regulação Neoplásica da Expressão Gênica , Humanos , Inibidores de Checkpoint Imunológico/farmacologia , Neoplasias Renais/diagnóstico , Neoplasias Renais/imunologia , Neoplasias Renais/mortalidade , Mutação , Receptor de Morte Celular Programada 1/metabolismo , Intervalo Livre de Progressão , Inibidores de Proteínas Quinases/farmacologia
8.
Am J Cardiovasc Drugs ; 21(3): 321-330, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33001355

RESUMO

BACKGROUND: Several clinical trials of dapagliflozin in patients with type 2 diabetes mellitus (T2DM) at elevated cardiovascular risk have observed reduced hospitalization for heart failure (HHF). Several studies have also suggested cardiovascular benefits for patients with HF regardless of whether or not they have T2DM. OBJECTIVE: This meta-analysis was conducted to evaluate the therapeutic effects of dapagliflozin in patients with HF. METHODS: The PubMed, Embase, Cochrane Library, and Web of Science databases were systematically searched from database inception to 15 February 2020. Clinical studies of dapagliflozin use in patients with HF were included. Data on HHF, all-cause mortality, cardiovascular death, major adverse cardiovascular events (MACE), systolic blood pressure, body weight, glycated hemoglobin (HbA1c), and adverse events were collected for analysis. RESULTS: Four randomized controlled trials involving 6738 patients with HF were included in this meta-analysis. Patients receiving dapagliflozin showed a significantly lower incidence of HHF [risk ratio (RR) 0.72; P < 0.00001], all-cause mortality (RR 0.83; P = 0.004), cardiovascular death (RR 0.86; P = 0.03), and MACE (RR 0.88; P = 0.03). Moreover, patients receiving dapagliflozin also showed significant improvements in systolic blood pressure and body weight. However, no statistical difference was observed in HbA1c. In addition, hypoglycemia, volume depletion, and renal impairment was not more frequent with dapagliflozin than with placebo. CONCLUSION: This meta-analysis suggests that dapagliflozin could be a therapeutic strategy for patients with HF regardless of the presence or absence of T2DM.


Assuntos
Compostos Benzidrílicos/uso terapêutico , Diabetes Mellitus Tipo 2/tratamento farmacológico , Glucosídeos/uso terapêutico , Insuficiência Cardíaca/tratamento farmacológico , Inibidores do Transportador 2 de Sódio-Glicose/uso terapêutico , Compostos Benzidrílicos/administração & dosagem , Compostos Benzidrílicos/efeitos adversos , Pressão Sanguínea/efeitos dos fármacos , Peso Corporal , Doenças Cardiovasculares/tratamento farmacológico , Doenças Cardiovasculares/mortalidade , Diabetes Mellitus Tipo 2/epidemiologia , Glucosídeos/administração & dosagem , Glucosídeos/efeitos adversos , Hemoglobinas Glicadas , Insuficiência Cardíaca/epidemiologia , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Risco , Inibidores do Transportador 2 de Sódio-Glicose/administração & dosagem , Inibidores do Transportador 2 de Sódio-Glicose/efeitos adversos
9.
Sci Rep ; 10(1): 5396, 2020 03 25.
Artigo em Inglês | MEDLINE | ID: mdl-32214162

RESUMO

As the second largest carbon flux in terrestrial ecosystems, the soil CO2 flux is closely related to the atmospheric CO2 concentration. The soil CO2 flux is the sum of biotic respiration and abiotic geochemical CO2 exchange; however, little is known about abiotic CO2 fluxes in arid areas. To investigate the relative contribution of abiotic and biotic soil CO2 fluxes over a diurnal course, the abiotic CO2 flux was distinguished by autoclaving sterilization in both saline and alkaline soils at an arid site in northwestern China. The results demonstrated that: (1) Over the diurnal course, the abiotic CO2 was a significant component of the soil CO2 flux in both saline and alkaline soil, which accounted for more than 56% of the diurnal soil CO2 flux. (2) There was a dramatic difference in the temperature response between biotic and abiotic CO2 fluxes: the response curves of biotic respiration were exponential in the saline soil and quadratic in the alkaline soil, while the abiotic CO2 flux was linearly correlated with soil temperature. They were of similar magnitude but with opposite signs: resulting in almost neutral carbon emissions on daily average. (3) Due to this covering up effect of the abiotic CO2 flux, biotic respiration was severely underestimated (directly measured soil CO2 flux was only one-seventh of the biotic CO2 flux in saline soil, and even an order of magnitude lower in alkaline soil). In addition, the soil CO2 flux masked the temperature-inhibition of biotic respiration in the alkaline soil, and veiled the differences in soil biological respiration between the saline and alkaline soils. Hence, the soil CO2 flux may not be an ideal representative of soil respiration in arid soil. Our study calls for a reappraisal of the definition of the soil CO2 flux and its temperature dependence in arid or saline/alkaline land. Further investigations of abiotic CO2 fluxes are needed to improve our understanding of arid land responses to global warming and to assist in identifying the underlying abiotic mechanisms.

10.
Pituitary ; 23(3): 246-252, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32062801

RESUMO

PURPOSE: This study was designed to develop a computer-aided diagnosis (CAD) system based on a convolutional neural network (CNN) to diagnose patients with pituitary tumors. METHODS: We included adult patients clinically diagnosed with pituitary adenoma (pituitary adenoma group), or adult individuals without pituitary adenoma (control group). After pre-processing, all the MRI data were randomly divided into training or testing datasets in a ratio of 8:2 to create or evaluate the CNN model. Multiple CNNs with the same structure were applied for different types of MR images respectively, and a comprehensive diagnosis was performed based on the classification results of different types of MR images using an equal-weighted majority voting strategy. Finally, we assessed the diagnostic performance of the CAD system by accuracy, sensitivity, specificity, positive predictive value, and F1 score. RESULTS: We enrolled 149 participants with 796 MR images and adopted the data augmentation technology to create 7960 new images. The proposed CAD method showed remarkable diagnostic performance with an overall accuracy of 91.02%, sensitivity of 92.27%, specificity of 75.70%, positive predictive value of 93.45%, and F1-score of 92.67% in separate MRI type. In the comprehensive diagnosis, the CAD achieved better performance with accuracy, sensitivity, and specificity of 96.97%, 94.44%, and 100%, respectively. CONCLUSION: The CAD system could accurately diagnose patients with pituitary tumors based on MR images. Further, we will improve this CAD system by augmenting the amount of dataset and evaluate its performance by external dataset.


Assuntos
Imageamento por Ressonância Magnética/métodos , Neoplasias Hipofisárias/diagnóstico por imagem , Neoplasias Hipofisárias/diagnóstico , Inteligência Artificial , Humanos , Redes Neurais de Computação
11.
FASEB J ; 34(3): 4189-4203, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31957105

RESUMO

Diabetic retinopathy (DR) is a common microvascular complication of diabetes mellitus. Abnormal energy metabolism in microvascular endothelium is involved in the progression of diabetic retinopathy. Bile Acid G-Protein-Coupled Membrane Receptor (TGR5) has emerged as a novel regulator of metabolic disorders. However, the role of TGR5 in diabetes mellitus-induced microvascular dysfunction in retinas is largely unknown. Herein, enzyme-linked immunosorbent assay was used for analyzing bile acid (BA) profiles in diabetic rat retinas and retinal microvascular endothelial cells (RMECs) cultured in high glucose medium. The effects of TGR5 agonist on streptozotocin (STZ)-induced diabetic retinopathy were evaluated by HE staining, TUNEL staining, retinal trypsin digestion, and vascular permeability assay. A pharmacological inhibitor of RhoA was used to study the role of TGR5 on the regulation of Rho/Rho-associated coiled-coil containing protein kinase (ROCK) and western blot, immunofluorescence and siRNA silencing were performed to study the related signaling pathways. Here we show that bile acids were downregulated during DR progression in the diabetic rat retinas and RMECs cultured in high glucose medium. The TGR5 agonist obviously ameliorated diabetes-induced retinal microvascular dysfunction in vivo, and inhibited the effect of TNF-α on endothelial cell proliferation, migration, and permeability in vitro. In contrast, knockdown of TGR5 by siRNA aggravated TNF-α-induced actin polymerization and endothelial permeability. Mechanistically, the effects of TGR5 on the improvement of endothelial function was due to its regulatory role on the ROCK signaling pathway. An inhibitor of RhoA significantly reversed the loss of tight junction protein under TNF-α stimulation. Taken together, our findings suggest that insufficient BA signaling plays an important pathogenic role in the development of DR. Upregulation or activation of TGR5 may inhibit RhoA/ROCK-dependent actin remodeling and represent an important therapeutic intervention for DR.


Assuntos
Retinopatia Diabética/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Quinases Associadas a rho/metabolismo , Proteína rhoA de Ligação ao GTP/metabolismo , Animais , Western Blotting , Linhagem Celular , Retinopatia Diabética/tratamento farmacológico , Células Endoteliais/efeitos dos fármacos , Células Endoteliais/metabolismo , Ensaio de Imunoadsorção Enzimática , Humanos , Imuno-Histoquímica , Marcação In Situ das Extremidades Cortadas , Masculino , Ratos , Ratos Sprague-Dawley , Receptores Acoplados a Proteínas G/agonistas , Receptores Acoplados a Proteínas G/genética , Retina/efeitos dos fármacos , Retina/metabolismo , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/genética , Fator de Necrose Tumoral alfa/farmacologia , Cicatrização/efeitos dos fármacos , Cicatrização/ética , Quinases Associadas a rho/genética , Proteína rhoA de Ligação ao GTP/genética
12.
Mil Med Res ; 5(1): 10, 2018 03 22.
Artigo em Inglês | MEDLINE | ID: mdl-29562934

RESUMO

BACKGROUND: The diagnosis of bacterium-negative pulmonary tuberculosis (TB) and extra-pulmonary TB is challenging clinically. The detection of the anti-TB antibody has an important, auxiliary, clinical diagnostic value. Therefore, TB antibody detection kits should be screened and evaluated, and the reagents with the highest sensitivity and specificity should be chosen and used clinically. METHODS: The diagnostic performance of 7 commercially available TB antibody detection kits (kits A, B, C, D, E, F and G) based on the gold immunoassay detection of immunoglobulin (Ig) G or IgM antibodies were simultaneously evaluated and compared in 62 TB cases and 56 non-TB cases in a laboratory. A retrospective analysis including 2549 cases was carried out to assess the clinical diagnosis values of bacteriological examinations and TB antibody tests (kits B and H used in the clinic). RESULTS: The sensitivities of TB antibody kits A, B, C, D, E, F and G in the sera from 62 TB patients were 50.0%, 83.9%, 38.7%, 9.7%, 48.4%, 69.4% and 79.0%, respectively; the sensitivities in the sera from 24 smear-negative TB patients were 29.2%, 79.2%, 29.2%, 12.5%, 29.2%, 54.2% and 79.2%, respectively; the specificities in the sera from 56 non-TB patients were 73.2%, 25.0%, 85.7%, 96.4%, 78.6%, 78.6% and 50.0%, respectively. Of the 2549 clinically diagnosed cases, there were 1752 pulmonary TB cases, 505 extra-pulmonary TB cases, 87 old pulmonary TB cases and 205 non-TB cases. The positive results for smear, culture, TB antibody kit B and kit H in pulmonary TB cases were 39.8% (543/1365), 48.6% (372/765), 45.8% (802/1752) and 25.2% (442/1752), respectively; the results in extra-pulmonary TB cases were 3.4% (6/178), 5.8% (4/69), 35.4% (179/505), and 11.3% (57/505), respectively; the results in old pulmonary TB cases were 0% (0/64), 0% (0/30), 32.2% (28/87), and 9.2% (8/87), respectively; and the results in non-TB cases were 0% (0/121), 0% (0/56), 21.5% (44/205), and 2.4% (5/205), respectively. Of 624 smear-positive and/or culture-positive pulmonary TB cases, the sensitivities of antibody test kits B and H were 53.0% and 36.4%, respectively. Of 901 smear-negative and/or culture-negative pulmonary TB cases, the sensitivities of antibody test kits B and H were 42.5% and 19.0%, respectively. The positive rate of antibody detection in the bacterium-positive pulmonary TB cases was significantly higher than that in the bacterium-negative pulmonary TB cases (P < 0.05). CONCLUSIONS: The colloidal gold-labeled TB antibody IgG detection assay is a simple, rapid and economical method that provides a better clinical auxiliary diagnosis value on TB, especially in smear-negative pulmonary TB and extra-pulmonary TB. The production, quality control, screening and evaluation of antibody detection kits are very important for its clinical application.


Assuntos
Kit de Reagentes para Diagnóstico/normas , Tuberculose/diagnóstico , China/epidemiologia , Humanos , Mycobacterium tuberculosis/imunologia , Mycobacterium tuberculosis/patogenicidade , Tuberculose/epidemiologia
13.
Oncotarget ; 8(39): 65957-65968, 2017 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-29029485

RESUMO

Frizzled (FZD) proteins are receptors for secreted WNT proteins and play a critical role in the malignant progression of various cancers. However, the role of human FZD family members in esophageal squamous cell carcinoma (ESCC) was rarely investigated. In this study, we found that the FZD7 gene was the most commonly up-regulated FZD member in ESCC cell lines compared with other FZDs. TMA studies further validated that FZD7 protein was up-regulated in 165 of 252 (65.5%) informative ESCC patients and significantly correlated with poor overall survival (P=0.001). Additionally, multivariate Cox regression analysis showed that FZD7 overexpression was an independent prognostic factor for ESCC patients. Ectopic expression of FZD7 could promote ESCC cell metastasis both in vitro and in vivo. Under WNT3A stimulation, FZD7 was able to induce the nuclear translocation of ß-catenin and activate the downstream targets of WNT/ß-catenin signaling, as well as promote epithelial-mesenchymal transition (EMT) potential in ESCC cells. Our study demonstrated for the first time that FZD7 contributes to the malignant progression of ESCC and represents a novel prognostic marker and a potential therapeutic target for ESCC patients.

14.
Sci Rep ; 5: 12174, 2015 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-26190745

RESUMO

Species competitive abilities and their distributions are closely related to functional traits such as biomass allocation patterns. When we consider how nutrient supply affects competitive abilities, quantifying the apparent and true plasticity in functional traits is important because the allometric relationships among traits are universal in plants. We propose to integrate the notion of allometry and the classical reaction norm into a composite theoretical framework that quantifies the apparent and true plasticity. Combining the framework with a meta-analysis, a series of field surveys and a competition experiment, we aimed to determine the causes of the dune/interdune distribution patterns of two Haloxylon species in the Gurbantonggut Desert. We found that (1) the biomass allocation patterns of both Haloxylon species in responses to environmental conditions were apparent rather than true plasticity and (2) the allometric allocation patterns affected the plants' competition for soil nutrient supply. A key implication of our results is that the apparent plasticity in functional traits of plants determines their response to environmental change. Without identifying the apparent and true plasticity, we would substantially overestimate the magnitude, duration and even the direction of plant responses in functional traits to climate change.


Assuntos
Clima Desértico , Plantas , Dinâmica Populacional , Característica Quantitativa Herdável , Biomassa , Fenótipo , Raízes de Plantas , Estações do Ano , Plântula , Solo/química
15.
J Child Neurol ; 30(1): 75-82, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24762865

RESUMO

The optimal therapeutic time-window and protective mechanism of hyperbaric oxygen in hypoxic-ischemic brain damage remain unclear. This study aimed to determine the neuroprotective effects of hyperbaric oxygen. Following hypoxic-ischemic brain damage modeling in neonatal rats, hyperbaric oxygen was administered at 6, 24, 48, and 72 hours and 1 week after hypoxia, respectively, once daily for 1 week. Fourteen days after hypoxic-ischemic brain damage, cell density and apoptosis rate, number of Fas-L+, caspase-8+, and caspase-3+ neuronal cells, levels of nitric oxide, malondialdehyde, and superoxide dismutase in hippocampus were examined. Morris water maze test was conducted 28 days after insult. Significant improvements were found in cell density, rate of apoptosis, oxidative stress markers, FasL, and caspases in rats treated with hyperbaric oxygen within 72 hours compared to hypoxic-ischemic injury. Similarly, time-dependent behavioral amelioration was observed in pups treated with hyperbaric oxygen. Our findings suggest that hyperbaric oxygen protects against hypoxic-ischemic brain damage by inhibiting oxidative stress and FasL-induced apoptosis, and optimal therapeutic time window is within 72 hours after hypoxic-ischemic brain damage.


Assuntos
Apoptose/fisiologia , Hipocampo/patologia , Oxigenoterapia Hiperbárica/métodos , Hipóxia-Isquemia Encefálica/terapia , Animais , Animais Recém-Nascidos , Caspase 3/metabolismo , Caspase 8/metabolismo , Contagem de Células , Modelos Animais de Doenças , Hipóxia-Isquemia Encefálica/patologia , Marcação In Situ das Extremidades Cortadas , Malondialdeído , Aprendizagem em Labirinto , Neurônios/patologia , Óxido Nítrico/metabolismo , Fosfopiruvato Hidratase/metabolismo , Ratos , Ratos Sprague-Dawley , Superóxido Dismutase/metabolismo , Fatores de Tempo
16.
Ther Clin Risk Manag ; 10: 45-9, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24453491

RESUMO

The People's Republic of China has nearly the highest incidence of both diabetes mellitus (DM) and tuberculosis (TB) worldwide. DM increases the risk of TB by two to three times and adversely affects TB treatment outcomes. The increasing epidemic of DM in the People's Republic of China is due to decreased physical activity, unhealthy diet, and obesity. Over the last 20 years, the excellent free China National Tuberculosis Program has been set up, and the "DOTS" (directly observed treatment + short-course chemotherapy) model for TB control has successfully reduced the burden of TB, but the disease is still a considerable problem. Given the high burden of TB and DM in the People's Republic of China and the relationship between the two diseases, it is sensible to screen DM patients for TB. A bidirectional screening of the two diseases was conducted in the People's Republic of China from 2011 to 2012, which identified a TB incidence in patients with DM of about 958 per 100,000. Here, we report the findings of our recent study on the incidence of TB among diabetic patients in the People's Republic of China. The data agree with those of previous reports.

17.
Sci Rep ; 3: 3098, 2013 Nov 14.
Artigo em Inglês | MEDLINE | ID: mdl-24226295

RESUMO

Invasion and metastasis are the main causes of treatment failure and death in breast cancer. Thus, novel invasion-based therapies such as those involving natural agents are urgently required. In this study, we examined the effects of magnolol (Mag), a compound extracted from medicinal herbs, on breast cancer cells in vitro and in vivo. Highly invasive cancer cells were found to be highly sensitive to treatment. Mag markedly inhibited the activity of highly invasive MDA-MB-231 cells. Furthermore, Mag significantly downregulated matrix metalloproteinase-9 (MMP-9) expression, an enzyme critical to tumor invasion. Mag also inhibited nuclear factor-κB (NF-κB) transcriptional activity and the DNA binding of NF-κB to MMP-9 promoter. These results indicate that Mag suppresses tumor invasion by inhibiting MMP-9 through the NF-κB pathway. Moreover, Mag overcame the promoting effects of phorbol 12-myristate 13-acetate (PMA) on the invasion of MDA-MB-231 cells. Our findings reveal the therapeutic potential and mechanism of Mag against cancer.


Assuntos
Antineoplásicos/farmacologia , Produtos Biológicos/farmacologia , Compostos de Bifenilo/farmacologia , Neoplasias da Mama/patologia , Lignanas/farmacologia , Animais , Antineoplásicos/uso terapêutico , Produtos Biológicos/uso terapêutico , Compostos de Bifenilo/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/metabolismo , Adesão Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Feminino , Xenoenxertos , Humanos , Lignanas/uso terapêutico , Metaloproteinase 9 da Matriz/metabolismo , NF-kappa B/metabolismo , Invasividade Neoplásica , Transdução de Sinais/efeitos dos fármacos , Carga Tumoral/efeitos dos fármacos
18.
Sci Rep ; 3: 2025, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23778238

RESUMO

An 'anomalous' negative flux, in which carbon dioxide (CO2) enters rather than is released from the ground, was studied in a saline/alkaline soil. Soil sterilization disclosed an inorganic process of CO2 dissolution into (during the night) and out of (during the day) the soil solution, driven by variation in soil temperature. Experimental and modeling analysis revealed that pH and soil moisture were the most important determinants of the magnitude of this inorganic CO2 flux. In the extreme cases of air-dried saline/alkaline soils, this inorganic process was predominant. While the diurnal flux measured was zero sum, leaching of the dissolved inorganic carbon in the soil solution could potentially effect net carbon ecosystem exchange. This finding implies that an inorganic module should be incorporated when dealing with the CO2 flux of saline/alkaline land. Neglecting this inorganic flux may induce erroneous or misleading conclusions in interpreting CO2 fluxes of these ecosystems.

19.
Int J Neurosci ; 123(2): 93-8, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23002909

RESUMO

Due to the complicated clinical features of mitochondrial encephalomyopathy, simplified mitochondrial disease criteria (MDC) have recently been established in Europe. This study evaluated the sensitivity and specificity of this scoring system in Chinese patients. Seventy-eight patients with suspected mitochondrial encephalomyopathy were recruited to be scored by the simplified MDC and were further classified into "possible" (2-4), "probable" (5-7), or "definite" categories (≥8). Significant differences were observed between the total scores in the mitochondrial encephalomyopathy group and the other myopathy group. In the mitochondrial encephalomyopathy group, 73.5% of patients had a score above 8, whereas in the other myopathy group, the "definite" percentage was only 3.2%, suggesting the proposed MDC scoring system has a high sensitivity for diagnosis of mitochondrial encephalomyopathy in China. Moreover, there were significant differences in the clinical scores and imaging portions of the MDC, suggesting that the simplified MDC may distinguish mitochondrial disorder from other multisystem disorders to aid in early diagnosis prior to a muscle biopsy.


Assuntos
Povo Asiático/etnologia , Encefalomiopatias Mitocondriais/diagnóstico , Encefalomiopatias Mitocondriais/etnologia , Índice de Gravidade de Doença , Adolescente , Adulto , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Doenças Mitocondriais/classificação , Doenças Mitocondriais/diagnóstico , Doenças Mitocondriais/etnologia , Encefalomiopatias Mitocondriais/classificação , Adulto Jovem
20.
Guang Pu Xue Yu Guang Pu Fen Xi ; 32(3): 817-20, 2012 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-22582660

RESUMO

An FI-KR non-separated method coupled with FAAS for the determination of Fe(II) and Fe(III) was developed. With 60 s of sampling at a flow rate of 6.0 mL x min(-1), EF of 41 for Fe(III) and 9 for Fe(II) were obtained. The precision (RSD, n = 11) for Fe(III) and Fe(II) was 2.3% and 3.1% at the 0.04 mg x L(-1) level respectively. When 0.1 per thousand phi TEA was used as masking reagent, the recovery rate for Fe(III) and Fe(II) was from 97% to 101% and from 96% to 100% respectively.

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