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1.
Chem Biodivers ; 2019 Dec 04.
Artigo em Inglês | MEDLINE | ID: mdl-31797569

RESUMO

(+)- and (-)-Xanchryones F and G ((+)- and (-)-1 and 2) were isolated from the plant Xanthostemon chrysanthus by chiral separation. Compounds 1 and 2 featured a new carbon skeleton with cinnmaoyltriketone-flavone adducts. Their structures with absolute configurations were elucidated by detailed spectroscopic analyses and chemical calculations. The anti-bacterial and anti-inflamatory activities of (+)- and (-)-1 and 2 were evaluated.

2.
Cancer Med ; 2019 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-31802650

RESUMO

BACKGROUNDS: Colorectal carcinoma (CRC) is a common malignant tumor. Increasing evidences indicated that CRC showed a resistance to 5-fluorouracil (5-FU) and further resulted in a poor prognosis. In this study, we aim to investigate the effect of long noncoding RNA nuclear paraspeckle assembly transcript 1 (LncRNA NEAT1) on cell viability, sensitivity to 5-FU, and autophagy of CRC cell lines. METHODS: MTT (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-Htetrazolium bromide) was used to detect cell viability, immunofluorescent staining was used to detect autophagy puncta, and luciferase reporter system was used to determine binding ability between miR-34a and NEAT1 or putative targets. Additionally, indicated mRNAs and protein expressions were determined by qRT-PCR or western blotting, respectively. RESULTS: We found that NEAT1 expression was increased in CRC tissues and cells, which showed a negative correlation with miR-34a expression. In addition, NEAT1 knockdown noticeably inhibited the proliferation of CRC cells and enhanced 5-FU sensitivity. It revealed that NEAT1 knockdown suppressed the LC3 puncta and the expressions of Beclin-1, ULK1, and ratio of LC3II/I. Overexpression of miR-34a showed similar trends with NEAT1 knockdown. miR-34a was validated to target the putative binding sites in 3'-UTR of HMGB1, ATG9A, and ATG4B, which are involved in the activation of autophagy. Inhibition of miR-34a or overexpression of HMGB1 could effectively reverse elevated 5-FU sensitivity upon NEAT1 knockdown. In addition, 3-MA reversed NEAT1 overexpression-induced resistance in HT29 cells. CONCLUSION: These findings indicate that LncRNA NEAT1 could target miR-34a and promote autophagy to facilitate 5-FU chemoresistance in CRC.

3.
Colloids Surf B Biointerfaces ; 185: 110607, 2019 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31707230

RESUMO

Development of multifunctional compounds as both fluorescence probes and non-viral vectors is still difficult till date. It is necessary to overcome many hurdles such as the balance of hydrophilic and hydrophobic moieties, binding affinity between multifunctional compound and targeting substrate, the cytotoxicity of multifunctional compound, and so on. In this work, the performances of compound 1 on Cu2+ recognition, lysosome staining and siRNA (small interfering RNA) delivery were investigated. It was found that compound 1 exhibited high selectivity and sensitivity toward Cu2+ in aqueous solutions. The fluorescence emission of 1 was quenched by a factor of 42-fold in the presence of Cu2+ ions. Even in the common pure organic solutions, still more than 8-fold fluorescence quenching was achieved. Due to its high sensitivity to the pH, the complex of 1-Cu was also successfully applied in selective staining of lysosome in HeLa cells. Furthermore, cellular uptake experiment revealed that compound 1 showed good RNA delivery ability in HeLa, HepG2, U2Os and MC3T3-E1 cells, and its performance was better than commercial agents lipofectamine 2000 and 25 kDa PEI (Polyethylenimine). The RNA interference effect mediated by compound 1 was further evaluated by real-time fluorescent quantitative PCR experiment. Compound 1 showed much higher transfection efficacy than lipofectamine 2000 in MC3T3-E1 cells. Our study demonstrated that 1,8-naphthalimide- [12]aneN3 compound 1 with low cytotoxicity, high specificity towards Cu2+ and lysosome, high transfection efficacy, and low cost is an efficient multifunctional material both in molecular recognition and gene delivery.

4.
Cardiovasc Ther ; 2019: 8563717, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31772619

RESUMO

Background: Fibrinogen levels have been associated with coronary plaque vulnerability in experimental studies. However, it has yet to be determined if serum fibrinogen levels are independently associated with coronary plaque vulnerability as detected by optical coherence tomography (OCT) in patients with coronary heart disease. Methods: Patients with coronary heart disease (CHD) who underwent coronary angiography and OCT in our department from January 2015 to August 2018 were included in this study. Coronary lesions were categorized as ruptured plaque, nonruptured with thin-cap fibroatheroma (TCFA), and nonruptured and non-TCFA. Presence of ruptured plaque and nonruptured with TCFA was considered to be vulnerable lesions. Determinants of coronary vulnerability were evaluated by multivariable logistic regression analyses. Results: A total of 154 patients were included in this study; 17 patients had ruptured plaques, 15 had nonruptured plaques with TCFA, and 122 had nonruptured plaques with non-TCFA. Results of univariate analyses showed that being male, diabetes, current smoking, high body mass index (BMI), and clinical diagnosis of acute coronary syndrome (ACS) were associated with coronary vulnerability. No significant differences were detected in patient characteristics, coronary angiographic findings, and OCT results between patients with higher and normal fibrinogen. Results of multivariate logistic analyses showed that diabetes and ACS were associated with TCFA, while diabetes, higher BMI, and ACS were associated with plaque rupture. Conclusions: Diabetes, higher BMI, and ACS are independently associated with coronary vulnerability as detected by OCT. Serum fibrinogen was not associated with coronary vulnerability in our cohort.

5.
Lipids Health Dis ; 18(1): 192, 2019 Nov 04.
Artigo em Inglês | MEDLINE | ID: mdl-31684966

RESUMO

BACKGROUND: This study was designed to investigate whether differential DNA methylationin of cholesterol absorption candidate genes can function as a biomarker for patients with coronary heart disease (CHD). METHODS: DNA methylation levels of the candidate genes FLOT1, FLOT2 and SOAT1 were measured in peripheral blood leukocytes (PBLs) from 99 patients diagnosed with CHD and 89 control subjects without CHD. A total of 110 CPG sites around promoter regions of them were examined. RESULTS: Compared with groups without CHD, patients with CHD had lower methylation levels of SOAT1 (P<0.001). When each candidate genes were divided into different target segments, patients with CHD also had lower methylation levels of SOAT1 than patients without (P = 0.005). After adjustment of other confounders, methylation levels of SOAT1 were still associated with CHD (P = 0.001, OR = 0.290, 95% CI: 0.150-0.561). CONCLUSIONS: SOAT1 methylation may be associated with development of CHD. Patients with lower methylation levels in SOAT1 may have increased risks for CHD. Further studies on the specific mechanisms of this relationship are necessary.

6.
Artigo em Inglês | MEDLINE | ID: mdl-31751287

RESUMO

This article investigates synchronization for a group of discrete-time neural networks (NNs) with the uncertain exchanging information, which is caused by the uncertain connection weights among the NNs nodes, and they are transformed into a norm-bounded uncertain Laplacian matrix. Distributed impulsive observers, which possess the advantage of reducing the communication load among NNs nodes, are designed to observe the NNs state. The impulsive controller is proposed to improve the efficiency of the controller. An impulsive augmented error system (IAES) is obtained based on the matrix Kronecker product. A sufficient condition is established to ensure synchronization of the group of NNs by proving the stability of the IAES. An iterative algorithm is given to obtain a suboptimal allowed interval of the impulsive signal, and the corresponding gains of the observer and the controller are derived. The developed result is illustrated by a numerical example.

7.
Am J Nephrol ; : 1-9, 2019 Nov 26.
Artigo em Inglês | MEDLINE | ID: mdl-31770758

RESUMO

BACKGROUND: Successful parathyroidectomy (PTX) with stable postoperative parathyroid hormone (PTH) levels is associated with the stabilization of coronary artery calcification score (CACS) in patients with severe secondary hyperparathyroidism (SHPT) undergoing hemodialysis. To use computed tomography (CT) to evaluate the influence of PTX on CACS in asymptomatic patients. METHODS: This study was performed with institutional review board approval. Written consent was obtained from each patient. Forty-eight patients (mean age ± SD 54.50 ± 13.14 years; range 33-77 years) undergoing maintenance hemodialysis who underwent PTX and 56 patients (mean age 55.28 ± 12.32 years; range 35-76 years) who did not undergo PTX received prospective follow-up for 2 years. CACS was quantitatively performed using the Agatston method after CT scan. The differences between baseline and end-of-study PTX parameters were analyzed with the paired Student t test. RESULTS: For patients who underwent PTX, mean square root of CACS did not increase from 23.16 ± 18.58 to 23.68 ± 18.16 (t = 1.846, p = 0.072) from baseline to follow-up. In patients who did not undergo PTX, mean square root of CACS increased from 20.21 ± 16.47 to 28.72 ± 20.95 (t = 10.110, p < 0.001) from baseline to follow-up. In addition, the median annual progression rate of CACS was lower among PTX patients (4.89%), compared with the marked annual progression rate of CACS in non-PTX patients (52.81%; t = 11.264, p < 0.001). CONCLUSION: Dysregulation of calcium and phosphate metabolism caused by SHPT may result in significant CAC progression in asymptomatic hemodialysis patients. Low PTH state after PTX may stabilize CAC progression in hemodialysis patients.

8.
J Org Chem ; 2019 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-31697081

RESUMO

Three pairs of dimeric phenylpropanoyl-phloroglucinol enantiomers, (+)- and (-)-xanthchrysones A-C [(+)- and (-)-1-3], as well as their postulated biosynthetic precursors, were isolated and identified from the leaves of Xanthostemon chrysanthus. Compound 1 featured an unprecedented bis-phenylpropanoyl-benzo[b]cyclopent[e] oxepine tricyclic backbone. Compounds 2 and 3 represent the first examples of 1-(cyclopentylmethyl)-3-(3-phenylpropanoyl)benzene scaffold. The structures and absolute configurations of 1-3 were determined by spectroscopic and X-ray diffraction analysis as well as electronic circular dichroism (ECD) calculation. Both (+)-2 and (-)-2 showed moderate antibacterial activities including several multidrug-resistant strains.

9.
J Environ Manage ; 255: 109885, 2019 Nov 22.
Artigo em Inglês | MEDLINE | ID: mdl-31765948

RESUMO

The physico-chemical characteristics of N fertilizers remain poorly understood with respect to their use with rape (Brassica napus L.) to remediate Cd-contaminated soil. In this work, eight types of fertilizer (comprising physico-chemical alkaline, neutral, and acidic N fertilizers) were employed to assess the effect of soil remediation via rape at different levels of Cd contamination (0, 5, and 10 mg kg-1 Cd). The results show that the pH of rhizosphere soils was significantly higher under physico-chemical alkaline N fertilizer treatments than under physico-chemical acidic and neutral N fertilizer treatments. The physico-chemical characteristics of N fertilizers affected the rhizosphere soil pH and promoted Cd phytoextraction and accumulation by rape. In the 5 mg kg-1 Cd-contaminated soil, the Cd accumulation and bioconcentration factor value in the shoots and the Cd translocation factor value were highest with the addition of NH4Cl, a physico-chemical acidic N fertilizer. Among the physico-chemical alkaline N fertilizers, Ca(NO3)2 enabled the highest accumulation of Cd in rape shoots when soil was contaminated with 10 mg kg-1 Cd. Thus, administering physico-chemical acidic N fertilizer to soils with lower Cd concentrations provides better remediation effects by rape, whereas physico-chemical alkaline N fertilizers are more effective in soils with higher Cd concentrations. These results show that physico-chemical N fertilizers can be employed to enhance the remediation of Cd-contaminated soil by rape and simultaneously improve the yield of this crop, with implications for environmental health and sustainable agricultural development.

10.
Mol Nutr Food Res ; : e1900601, 2019 Oct 17.
Artigo em Inglês | MEDLINE | ID: mdl-31622021

RESUMO

SCOPE: Palmitic acid (PA) contributes to the pathogenesis of cardiovascular disease by promoting endothelial dysfunction, while naringenin, most abundant in oranges, has been shown to exert multiple beneficial effects on the human cardiovascular system. This study explores whether naringenin prevents PA-induced apoptosis in human umbilical vein endothelial cells (HUVECs). METHODS AND RESULTS: Treatment of PA for at least 24 h causes observable decrease in levels of cell viability, oxidative stress, disorder of autophagy flux, and apoptosis in HUVECs. Naringenin enhances the viability of the PA-treated HUVECs and, additionally, effectively decreases oxidative stress by scavenging ROS, and increasing the SOD2 level and GPx activity. Autophagy flux is protected by naringenin, as evidenced by the decreases in the ratio of LC3B-II/I, expression level of p62 and number of autophagosomes, and the increase in the number of autolysosomes in the PA-induced HUVECs. These effects are confirmed by the oxidative stress inhibitor N-acetyl-cysteine and autophagy inhibitor chloroquine. The molecular data indicate that the protective effects of naringenin on autophagy flux may also be regulated via the JNK pathway, as verified via the application of JNK inhibitor SP600125. CONCLUSION: These findings provide a possible mechanism by which naringenin prevents endothelial dysfunction and cardiovascular diseases.

11.
Plant Cell ; 2019 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-31615848

RESUMO

Under nutrient and energy-limiting conditions, plants up-regulate sophisticated catabolic pathways such as autophagy to remobilize nutrients and restore energy homeostasis. Autophagic flux is tightly regulated under these circumstances through the autophagy-related (ATG)-1 kinase complex, which relays upstream nutrient and energy signals to the downstream components that drive autophagy. Here, we investigated the role(s) of the Arabidopsis ATG1 kinase during autophagy through an analysis of a quadruple mutant deficient in all four ATG1 isoforms. These isoforms appear to act redundantly, including the plant-specific, truncated ATG1t variant, and like other well-characterized atg mutants, homozygous atg1abct plants display early leaf senescence and hypersensitivity to nitrogen and fixed-carbon starvation. Although the ATG1 kinase is essential for up-regulating autophagy under nitrogen deprivation and short-term carbon starvation, it did not stimulate autophagy under prolonged carbon starvation. Instead, an ATG1-independent response arose requiring the phosphatidylinositol-3-phosphate (PI3K) and Sucrose-Non-Fermenting Kinase (SnRK)-1 kinases, possibly through phosphorylation of the ATG6 subunit within the PI3K complex by the catalytic KIN10 subunit of SnRK1. Together, our data connect the ATG1 kinase to autophagy, and reveal that plants engage multiple pathways to activate autophagy during nutrient stress, which include the ATG1 route as well as an alternative route requiring SnRK1 and ATG6 signaling.

12.
Sci Rep ; 9(1): 15374, 2019 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-31653961

RESUMO

The optimum granulocyte colony-stimulating factor (G-CSF) treatment for cancer patients after being treated with cytotoxic chemotherapy remains unknown. Therefore, a systematic review and Bayesian network meta-analysis were performed to assess the efficacy and tolerability of 11 G-CSF drugs on patients after chemotherapy. A total of 73 randomized controlled trials (RCTs) containing 15,124 cancer patients were included for the final network meta-analysis. Compared with pegfilgrastim, there were a higher risk with filgrastim for incidence of febrile neutropenia (FN) (OR [95% CI]: 1.63 [1.07, 2.46]), and a higher risk with short-acting G-CSF (S-G-CSF) biosimilar and lenograstim for incidence of bone pain (BP) (OR [95% CI]: 6.45 [1.10, 65.73], 5.12 [1.14, 26.12], respectively). Mecapegfilgrastim, lipegfilgrastim and balugrastim were best G-CSF drugs in reducing FN (cumulative probabilities: 58%, 15%, 11%, respectively). S-G-CSF biosimilar, empegfilgrastim, and long-acting G-CSF (L-G-CSF) biosimilar were best G-CSF drugs in reducing severe neutropenia (SN) (cumulative probabilities: 21%, 20%, 15%, respectively). Mecapegfilgrastim, balugrastim, lipegfilgrastim and L-G-CSF biosimilar were best G-CSF drugs in reducing BP (cumulative probabilities: 20%, 14%, 8%, 8%, respectively). Mecapegfilgrastim, lipegfilgrastim and balugrastim might be the most appreciate G-CSF drugs with both good efficacy and tolerability when treating cancer patients after cytotoxic chemotherapy.

13.
Zhonghua Wei Zhong Bing Ji Jiu Yi Xue ; 31(9): 1149-1153, 2019 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-31657342

RESUMO

OBJECTIVE: To analyze the specificity and sensitivity of the modified microbubble test in identifying the peripherally inserted central venous catheters (PICC) tip based on the chest X-ray location as the "gold standard", and to find out an accurate and noninvasive PICC tip positioning method that can save time and cost. METHODS: Convenient sampling method was conducted. The patients under PICC guided by ultrasound in intensive care unit (ICU) or PICC clinic of the First Affiliated Hospital of Nanchang University from August 2017 to February 2018 were enrolled. All patients were followed up by ultrasound guided PICC catheter placement, modified microbubble test and chest X-ray localization. The relationship between the density of microbubbles in modified microbubble test and the location of PICC tip in chest X-ray localization was analyzed. Using chest X-ray localization as the "gold standard", the diagnostic evaluation indexes such as specificity and sensitivity of PICC tip identification by modified microbubble test were calculated. RESULTS: A total of 120 patients were enrolled during the study period, excluding those who refused to participate in the study, unclear right atrial ultrasound, conscious intolerance, unclear chest X-ray, and finally 108 patients completed the modified microbubble test and chest X-ray tip localization. According to the chest X-ray localization results of 108 patients, 69 patients (63.9%) were in ideal locations, 33 (30.6%) were in dissatisfactory position, and 6 (5.5%) were in malposition. There was no significant difference in gender, age, tube placement, depth of catheterization, placement of catheterization room, and catheterization among the three groups. In the modified microbubble test, there were 74 patients (68.5%) with grade I microbubble, 25 (23.2%) with grade II microbubble, and 9 (8.3%) with grade III microbubble. There was a correlation between microbubble density and the tip position of the catheter, showing a moderate intensity correlation, and the contingency coefficient was 0.662. The sensitivity of the modified microbubble test for PICC tip positioning was 95.7% (66/69), the specificity was 89.7% (35/39), the rate of missed diagnosis was 4.4% (3/69), the misdiagnosis rate was 10.3% (4/39), the positive predictive value was 94.3% (66/70), the negative predictive value was 92.1% (35/38), and the Youden index was 0.85. The consistency between the two methods was good, and the Kappa value was 0.86. CONCLUSIONS: Compared with the chest X-ray localization method, the modified microbubble test method has high sensitivity and specificity in identifying PICC in the position, and the operation is simple, noninvasive, with less time and low cost. The modified microbubble test can be used as a screening test for PICC tip position, especially in ICU. When there are technical limitations or suspicious patient, further chest X-ray is necessary.


Assuntos
Cateterismo Venoso Central , Cateteres Venosos Centrais , Cateterismo Periférico , Humanos , Microbolhas , Ultrassonografia
14.
Dis Markers ; 2019: 9673129, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31534563

RESUMO

Purpose: Early detection of esophageal cancer is beneficial to the survival and prognosis of patients. Circular RNAs (circRNAs) have been shown to be a potential biomarker for cancer, which can be used for the diagnosis of esophageal cancer. However, the roles of circRNAs in the diagnosis of esophageal cancer has been controversial. The present study, therefore, is aimed at determining the diagnostic accuracy of circRNAs in esophageal cancer. Methods: Relevant researches were searched from PubMed, Embase, Cochrane Library, OVID, and ISI Web of Science online databases up to March 11, 2019. The estimation of diagnostic indicators, threshold effect, and publication bias were measured by a bivariate binomial mixed model, the Spearman correlation, and Deeks' funnel plot asymmetry test, respectively. Results: Five studies from 4 articles were included in this meta-analysis. The pooled sensitivity, specificity, overall positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and area under the receiver operating characteristics curve (AUC) were 0.79 (95% CI: 0.69-0.87), 0.85 (95% CI: 0.68-0.94), 5.27 (95% CI: 2.46-11.32), 0.24 (95% CI: 0.16-0.36), 21.66 (95% CI: 9.33-50.30), and 0.88 (95% CI: 0.84-0.90), respectively. The Spearman correlation coefficient was 0.60 (P = 0.285). The P value of Deeks' funnel plot was 0.81. Conclusion: The above-mentioned results suggested that circRNAs possess a relatively higher diagnostic performance in distinguishing esophageal cancer patients from healthy individuals. Therefore, they may serve as potential clinical biomarkers for esophageal cancer diagnosis.

15.
BMJ Open ; 9(9): e028131, 2019 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-31562143

RESUMO

OBJECTIVE: Overweight and obesity have been shown to be related to multiple chronic conditions, leading to a heavy economic burden on society throughout the world. This study aims to estimate the prevalence of overweight and obesity and determine potential influencing factors among adults in Xinjiang, northwest China. DESIGN: A community-based observational study. SETTING: The First Affiliated Hospital of Xinjiang Medical University. METHODS: In total, 14 618 adult participants (7799 males; 6819 females) aged over 35 years were recruited from the Cardiovascular Risk Survey conducted in 2010. Data were obtained from face-to-face interviews and physical examinations. The sample was used to estimate the prevalence of overweight (body mass index (BMI) 24-28 kg/m2) and obesity (BMI ≥28 kg/m2) in Xinjiang Province. Influencing factors were analysed based on statistical methods. RESULTS: In Xinjiang Province, the overall prevalence of overweight was 36.5% (male 40.1%; female 33.4%), and the prevalence of obesity was 26.5% (male 27.2%; female 25.8%). The prevalence of both overweight and obesity were higher in women than in men (p<0.001). The main influencing factors for overweight and obesity were sex, age, race, marital status, education level, occupation, smoking, drinking, hypertension, diabetes and dyslipidaemia (p<0.05). CONCLUSIONS: This study estimated that the prevalence of overweight and obesity among adult residents of Xinjiang Province, northwest China, was high. These data suggest that efforts related to the prevention and control of overweight and obesity should be a public health priority in northwest China.

16.
Can J Cardiol ; 35(10): 1366-1376, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31495686

RESUMO

BACKGROUND: The purpose of the study was to assess the value of admission macrophage migration inhibitory factor (MIF) levels in predicting clinical outcomes in ST-elevation myocardial infarction (STEMI) patients. METHODS: For this study we recruited 498 STEMI patients after they received percutaneous coronary intervention (PCI), 40 with stable angina pectoris and 137 healthy participants. Plasma MIF levels were measured at admission and after PCI. The primary end points were in-hospital mortality and major adverse cardio-and/or cerebrovascular events (MACCE) during hospitalization and 3.2-year follow-up period. RESULTS: Admission MIF levels were elevated in 88.4% of STEMI patients over the upper reference limit of healthy controls and it was 3- to 7-fold higher than that in stable angina pectoris and control groups (122 ± 61 vs 39 ± 19 vs 17 ± 8 ng/mL; P < 0.001). Admission MIF levels were significantly higher in patients who died after myocardial infarction vs survivors. For predicting in-hospital mortality using the optimal cutoff value (127.8 ng/mL) of MIF, the area under the receiver operating characteristic curve for MIF was 0.820, similar area under the receiver operating characteristic curve values for predicting short-term outcomes were observed for high-sensitivity troponin T, CK-MB, N-terminal probrain natriuretic peptide, and Global Registry of Acute Coronary Events (GRACE) score. Although peak high-sensitivity troponin T and N-terminal probrain natriuretic peptide also predicted MACCE during the follow-up period, only higher admission MIF levels predicted in-hospital mortality and MACCE during the 3.2-year follow-up. Multivariate regression analysis showed the independent predictive value of a higher admission MIF level (≥ 127.8 ng/mL) on in-hospital mortality (odds ratio, 9.1; 95% confidence interval, 1.7-47.2) and 3.2-year MACCE (hazard ratio, 2.8; 95% confidence interval, 1.5-5.6). CONCLUSIONS: A higher admission MIF level is an independent predictor for in-hospital mortality and long-term MACCE in STEMI patients who underwent PCI.

17.
Ophthalmic Genet ; 40(4): 309-312, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31512979

RESUMO

Objective: The aim of this study was to investigate genetic factors associated with idiopathic choroidal neovascularization (ICNV). Methods: We conducted a case-control study including 69 cases with ICNV and 114 controls who underwent cataract surgery. Single nucleotide polymorphisms (SNPs) from genes reported to be related to AMD, CNV and uveitis were selected for this study. Results: In an univariate analysis, the rs669676 SNP located in the COL8A1 gene was associated with the proportion of people who has idiopathic CNV ( X2 = 9.3453, corrected p-value = 0.1). For the rs669676 SNP, minor allele homozygotes, in the dominant model of genotype analysis (GG versus AA-GA), it showed significant differences in the ICNV group vs controls (p = .01, OR = 1.219 (95%CI: 1.04-1.429)). Conclusions: The rs669676 SNP located in the COL8A1 gene may contribute to a genetic susceptibility for ICNV.

18.
Am J Crit Care ; 28(5): 370-376, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31474607

RESUMO

BACKGROUND: High-flow oxygen therapy has been widely adopted, but its use for weaning patients from mechanical ventilation has not been reported. OBJECTIVE: To evaluate whether high-flow oxygen therapy improves the efficiency of weaning patients from mechanical ventilation. METHODS: In a single-center, prospective study, patients receiving mechanical ventilation were randomly assigned to 1 of 3 groups (T-tube, pressure support ventilation, or high-flow oxygen) during 2-hour spontaneous breathing trials in a 14-day study. Participants were followed up until hospital discharge or death. RESULTS: Of 268 patients included, 90 were assigned to the T-tube group, 96 to the pressure support ventilation group, and 82 to the high-flow oxygen group. The first-day 2-hour spontaneous breathing trial passing rates were higher in the pressure support ventilation and high-flow oxygen groups than in the T-tube group (P < .05). The time needed to pass the spontaneous breathing trial was less in the pressure support ventilation and high-flow oxygen groups than in the T-tube group (P < .05). The reintubation rate was lower and the successful weaning rate on the first day was higher in the high-flow oxygen group than in the T-tube and pressure support ventilation groups (P < .05). During the 14-day study period, the weaning time was less in the high-flow oxygen group than in the T-tube and pressure support ventilation groups (P < .05). CONCLUSION: High-flow oxygen therapy can reduce the time needed to wean patients from mechanical ventilation by shortening the time needed to pass a spontaneous breathing trial and by decreasing the reintubation rate.

19.
Arch Oral Biol ; 108: 104525, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31472278

RESUMO

OBJECTIVES: This study aims to investigate the role of Cannabinoid receptor 2 (CB2) on osteogenesis of bone marrow-derived mesenchymal stem cells (BMSCs) under hypoxia. MATERIALS AND METHODS: BMSCs were isolated from Sprague-Dawley rats and cultured in the presence of cobalt chloride (CoCl2) to induce intracellular hypoxia. Cell proliferation was measured with MTT assay. Quantitative real-time PCR and western blot were applied to evaluate the mRNA and protein expressions of CB2 and osteogenic indicators including osteocalcin, RUNX2, collagen-1 and osterix (SP7). The osteogenic differentiation of BMSCs was further examined by ALP assay and alizarin red S (ARS) staining. Moreover, the activation of MAPKs signaling pathways was analyzed by western blot. RESULTS: CoCl2 dose-dependently increased hypoxia inducible factor while higher concentrations (200 and 400 µM) of CoCl2 markedly inhibited cell proliferation. CoCl2 induced hypoxia significantly increased the protein and mRNA expressions of osteocalcin, RUNX2, collagen-1 and osterix, along with enhanced ALP and ARS staining. Interestingly, such effects can be inhibited by the addition of CB2 inhibitor AM630. Moreover, AM630 partially inhibited hypoxia-induced p38 and ERK pathways, which may lead to a decrease in the osteogenic transcripts of RUNX2, collagen-1 and osterix. CONCLUSIONS: CoCl2 induced hypoxia could promote osteogenesis of rat BMSCs possibly through CB2.

20.
Math Biosci Eng ; 16(5): 4908-4922, 2019 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-31499696

RESUMO

Steganography poses a serious challenge to forensics because investigators cannot identify even traces of secret messages embedded using a steganographer. Contrarily, the objective of locating steganalysis is to locate the embedded message, which should help extract the secret message. In this paper, a methodology of locating steganalysis using quantitative steganalysis is presented for multiple stego images with embedded messages along the same embedding path. Three typical quantitative steganalysis methods are applied to the methodology to locate the messages embedded using LSB re-placement. Experimental results show that the presented methods can reliably estimate the embedding positions, which verifies the validity of the presented methodology. The presented methodology points out a new use of quantitative steganalysis, and further demonstrates that it is necessary to design more precise quantitative steganalysis methods.

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