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1.
Curr Neurovasc Res ; 2024 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-38551049

RESUMO

OBJECTIVE: Cerebral Small Vessel Disease (CSVD) has not been systematically studied in patients with Transient Global Amnesia (TGA). We aimed to investigate the CSVD burden in patients with TGA and its relationship with TGA recurrence. METHODS: We retrospectively examined 69 patients diagnosed with TGA in a single center between January 2015 and November 2023. The overall CSVD burden and single CSVD imaging markers, including enlarged perivascular spaces in the hippocampus (H-EPVS), were measured in each patient and compared with those in 69 age- and sex-matched healthy controls. Multivariate logistic regression was performed to determine independent predictors of recurrence. RESULTS: Of the 69 included patients, 40 (58%) were female, and the median age was 67 years (range 42-83 years). Twenty-one patients (30.4%) showed dot-like hippocampal hyperintensities on diffusion-weighted imaging (DWI). The mean follow-up was 51 months. Sixteen patients (23.2%) experienced TGA recurrence. The burden of overall CSVD, lacunes, WMH, EPVS, and extensive H-EPVS was higher in TGA patients than in controls. TGA patients who experienced recurrence had a heavier overall CSVD burden, lower frequency of hippocampal DWI hyperintensities, and longer follow-up duration than those who had with single episode. In the multivariate analysis, only follow-up duration was an independent predictor of TGA recurrence. CONCLUSION: The overall CSVD burden and extensive H-EPVS burden were higher in patients with TGA than healthy controls. Follow-up duration but not overall CSVD burden may predict TGA recurrence.

2.
Nat Commun ; 15(1): 2245, 2024 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-38472279

RESUMO

Bifacial perovskite solar cells have shown great promise for increasing power output by capturing light from both sides. However, the suboptimal optical transmittance of back metal electrodes together with the complex fabrication process associated with front transparent conducting oxides have hindered the development of efficient bifacial PSCs. Here, we present a novel approach for bifacial perovskite devices using single-walled carbon nanotubes as both front and back electrodes. single-walled carbon nanotubes offer high transparency, conductivity, and stability, enabling bifacial PSCs with a bifaciality factor of over 98% and a power generation density of over 36%. We also fabricate flexible, all-carbon-electrode-based devices with a high power-per-weight value of 73.75 W g-1 and excellent mechanical durability. Furthermore, we show that our bifacial devices have a much lower material cost than conventional monofacial PSCs. Our work demonstrates the potential of SWCNT electrodes for efficient, stable, and low-cost bifacial perovskite photovoltaics.

4.
Tissue Cell ; 86: 102290, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38103473

RESUMO

Accelerating the repair of damaged endothelium can effectively inhibit the progression of atherosclerosis (AS). Transient receptor potential channel TRPM4 is a non-selective cation channel activated by internal Ca2+, which is expressed in endothelial cells. This study aimed to reveal the potential role of TRPM4 in AS along with the mechanism. Human coronary artery endothelial cells (HCAECs) induced by ox-LDL was regarded as an in vitro model. The impacts of TRPM4 knockdown on cellular inflammation response, oxidative stress, normal endothelial function and lipid peroxidation were evaluated. Given that ferroptosis promotes AS progression, the effects of TRPM4 on intracellular iron ions and ferroptosis-related proteins was determined. Afterwards, HCAECs were treated with ferroptosis inducer erastin, and the influence of ferroptosis in the cellular model was revealed. TRPM4 was elevated in response to ox-LDL treatment in HCAECs. TRPM4 knockdown reduced the inflammation response, oxidative stress and lipid peroxidation caused by ox-LDL, and maintained the normal function of HCAECs. Erastin treatment destroyed the impacts of TRPM4 knockdown that are beneficial for cells to resist ox-LDL, showing the enhancement of the above adverse factors. Together, this study found that TRPM4 knockdown reduced ox-LDL-induced inflammation, oxidative stress, and dysfunction in HCAECs, possibly via a mechanism involving Fe2+ and ferroptosis-related proteins.


Assuntos
Ferroptose , Canais de Cátion TRPM , Humanos , Receptores de LDL/metabolismo , Receptores de LDL Oxidado/metabolismo , Células Endoteliais/metabolismo , Receptores Depuradores Classe E/metabolismo , Células Cultivadas , Lipoproteínas LDL/farmacologia , Lipoproteínas LDL/metabolismo , Vasos Coronários/metabolismo , Proteínas/metabolismo , Inflamação/metabolismo , Canais de Cátion TRPM/genética , Canais de Cátion TRPM/metabolismo
5.
Polymers (Basel) ; 15(22)2023 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-38006076

RESUMO

Coil-rod copolymers with a dendritic polyethylene (DPE) core and multiple helical poly(γ-benzyl-L-glutamate) (PBLG) arms (DPE-(PBLG)n) were prepared by palladium-catalyzed copolymerization in tandem with ring-opening polymerization (ROP). Macroinitiator (DPE-(NH2)11) was firstly prepared by the group transformation of DPE-(OH)11 generated from palladium-catalyzed copolymerization of ethylene and acrylate comonomer. Coil-helical DPE-(PBLG)11 copolymers were prepared by ROP of γ-benzyl-L-glutamate-N-carboxyanhydride (BLG-NCA). These DPE-(PBLG)11 copolymers could form thermoreversible gels in toluene solvent, and the dendritic topology of the DPE core increased the critical gelation concentrations. The self-assembled nanostructure of gels was fully characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), and wide-angle X-ray diffraction (WAXD), and the morphology of the fibrous structure was a twisted flat ribbon through a self-assembled nanoribbon mechanism. The self-assembled fibers formed by DPE-(PBLG45)11 are more heterogeneous and ramified than previously observed fibers formed by PBLG homopolymer and block copolymers.

6.
Angew Chem Int Ed Engl ; 62(45): e202308182, 2023 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-37750328

RESUMO

Zn-I2 batteries have attracted attention due to their low cost, safety, and environmental friendliness. However, their performance is still limited by the irreversible growth of Zn dendrites, hydrogen evolution reactions, corrosion, and shuttle effect of polyiodide. In this work, we have prepared a new porous polymer (CD-Si) by nucleophilic reaction of ß-cyclodextrin with SiCl4 , and CD-Si is applied to the solid polymer electrolyte (denoted PEO/PVDF/CD-Si) to solve above-mentioned problems. Through the anchoring of the CD-Si, a conductive network with dual transmission channels was successfully constructed. Due to the non-covalent anchoring effect, the ionic conductivity of the solid polymer electrolytes (SPE) can reach 1.64×10-3  S cm-1 at 25 °C. The assembled symmetrical batteries can achieve highly reversible dendrite-free galvanizing/stripping (stable cycling for 7500 h at 5 mA cm-2 and 1200 h at 20 mA cm-2 ). The solid-state Zn-I2 battery shows an ultra-long life of over 35,000 cycles at 2 A g-1 . Molecular dynamics simulations are performed to elucidate the working mechanism of CD-Si in the polymer matrix. This work provides a novel strategy towards solid electrolytes for Zn-I2 batteries.

7.
J Environ Manage ; 345: 118730, 2023 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-37536133

RESUMO

Air pollution is an inevitable negative environmental externality in the process of industrialization and urbanization in countries around the world. Land misallocation in the process of urbanization and industrialization and the resulting urban sprawl exacerbates the above problems. As a major country in the stage of rapid urbanization and industrialization, China also faces severe air pollution problems. Therefore, this paper will systematically study the impact of land misallocation and urban sprawl on air pollution. We first set up the utility maximization problem of each economic entity in the process of land misallocation in the mathematical model, and form a general equilibrium theory model to analyze the relationship between land misallocation, urban sprawl and air pollution, and then put forward the research hypotheses. We further use the big data of land market transactions of China Land Market Network and LandScan global population data to build the land misallocation index and urban sprawl index respectively, and use an extended mediating effect model to empirically test the hypotheses. The results suggest that the effect of land misallocation on air pollution is significantly positive, and the impact of land misallocation on urban sprawl largely depends on the return rate of land relative to labor (RRIRL). When the RRIRL is relatively low, the impact is weak, or even has a negative effect to some extent. At this time, low transportation costs are conducive to reducing air pollution. On the contrary, when the RRIRL is relatively high, land misallocation has a significant role in promoting urban sprawl. At this time, high traffic costs are conducive to reducing air pollution. In addition, we also find that there is an inverted U-shaped relationship between urban sprawl and air pollution. When the urban sprawl level is low, its impact on air pollution increases with the increase of its level, but once it exceeds a specific node, the impact will decrease. Based on the characteristics of the relationship among land misallocation, urban sprawl and air pollution under different RRIRL, we summarize four environmentally friendly urban development paths. We bring the land bid rent theory and environmental pollution research into a same theoretical model framework, which provides a modeling idea and research perspective with a micro-foundation for subsequent research on land misallocation. We integrate the research conclusions of existing literature and unify them under the research frameworks concerning different RRIRL in the empirical results, which greatly improving their applicability. The four urban development paths summarized in this paper will also provide inspiration for future researchers and policy makers.


Assuntos
Poluição do Ar , Urbanização , Poluição Ambiental , China , Modelos Teóricos , Cidades
8.
PLoS One ; 18(7): e0288199, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37440590

RESUMO

This paper analyzes how housing prices affect innovation and entrepreneurship. We construct a city-level panel dataset including 281 cities between 2009 and 2019 by merging housing price data from China Statistical Yearbook for Regional Economy with innovation and entrepreneurship data from Peking University Open Research Data Platform. Our results suggest that housing prices are positively associated with the vitality of innovation and entrepreneurship (VIE). The results remain consistent with a series of robustness checks. We also find that rising house prices promote VIE through the wealth effect and the siphon effect. Spatial effect analysis further shows that housing prices not only positively affect the VIE of local cities, but also positively affect the VIE of neighboring cities. These findings imply the necessity of curbing the excessive rise of housing prices and decoupling public services and benefits related to homeownership.


Assuntos
Empreendedorismo , Habitação , Humanos , Cidades , China
9.
Neurol Sci ; 44(1): 171-180, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36169754

RESUMO

OBJECTIVE: Our study aimed to investigate the correlations between microstructural changes of cingulum and patients with mild cognitive impairment (MCI) by diffusion kurtosis imaging (DKI) technique. METHOD: A total of 104 patients with cerebral small vessel diseases (cSVD) were retrospectively enrolled in this study. According to Montreal Cognitive Assessment Scale (MoCA) scores, these patients were divided into MCI group (n = 59) and non-MCI group (n = 45). The general clinical data was collected and analyzed. The regions of interests (ROIs) were selected for investigation in cingulum. The values of DKI parameters were measured in each ROI and compared between the two groups, the correlations between DKI parameters and MoCA scores were examined. RESULTS: Compared to non-MCI group, MCI patients had more severe white matter hyperintensities (WMHs) (P = 0.038) and lower MoCA scores (P < 0.01). MCI patients showed significantly decreased fractional anisotropy (FA), axial kurtosis (AK), mean kurtosis (MK), radial kurtosis (RK), and kurtosis fractional anisotropy (KFA) in the left cingulum in the cingulated cortex (CgC) region (all P < 0.0125). In the left CgC region, FA, AK, MK, RK, and KFA were positively correlated with MoCA scores (r = 0.348, 0.409, 0.310, 0.441, 0.422, all P < 0.001). Meanwhile, FA, AK, MK, RK, and KFA were also positively correlated with MoCA scores (r = 0.338, 0.352, 0.289, 0.380, 0.370, all P < 0.001) in the right CgC region. CONCLUSION: DKI technique could be used to explore the microstructural changes of cingulum in MCI patients and DKI-derived parameters might be feasible to evaluate MCI patients.


Assuntos
Disfunção Cognitiva , Substância Branca , Humanos , Substância Branca/diagnóstico por imagem , Estudos Retrospectivos , Imagem de Tensor de Difusão/métodos , Córtex Cerebral , Disfunção Cognitiva/diagnóstico por imagem
10.
Chem Sci ; 13(37): 11126-11131, 2022 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-36320467

RESUMO

The separation of acetylene from ethylene is a crucial process in the petrochemical industry, because even traces of acetylene impurities can poison the catalysts of ethylene polymerization. Herein, we synthesize a new family of 3D porous aromatic frameworks (PAFs), non-functionalized PAF-28, carbene-functionalized PAF-28 (cPAF-28) and imidazolium-functionalized PAF-28 (iPAF-28), via Sonogashira coupling reactions. These PAFs show high porosity and good thermal stability. Both cPAF-28 and iPAF-28 are proved to be good candidates for C2H2 adsorption, demonstrated by C2H2/C2H4 selectivity of 12.2 and 15.4, and C2H2 capacity of 48 cm3 g-1 and 57 cm3 g-1, which are significantly higher than those of non-functionalized PAF-28 (1.8, 37 cm3 g-1). Furthermore, the cPAF-28 and iPAF-28 display good breakthrough performance and remarkable recyclability for the separation of the C2H2/C2H4 gas mixture. In addition, the C2H2/C2H4 adsorption sites are revealed by DFT calculations. This work sheds a new light on gas molecular recognition by tailoring the pore chemistry of PAFs.

11.
Nat Mater ; 20(10): 1337-1346, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34531574

RESUMO

Halide perovskites are a compelling candidate for the next generation of clean-energy-harvesting technologies owing to their low cost, facile fabrication and outstanding semiconductor properties. However, photovoltaic device efficiencies are still below practical limits and long-term stability challenges hinder their practical application. Current evidence suggests that strain in halide perovskites is a key factor in dictating device efficiency and stability. Here we outline the fundamentals of strain within halide perovskites relevant to photovoltaic applications and rationalize approaches to characterize the phenomenon. We examine recent breakthroughs in eliminating the adverse impacts of strain, enhancing both device efficiencies and operational stabilities. Finally, we discuss further challenges and outline future research directions for placing stress and strain studies at the forefront of halide perovskite research. An extensive understanding of strain in halide perovskites is needed, which would allow effective strain management and drive further enhancements in efficiencies and stabilities of perovskite photovoltaics.

12.
Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi ; 37(7): 602-607, 2021 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-34140071

RESUMO

Objective To explore the anti-tumor activity of oncolytic vaccinia virus expressing CD40L (CD40L-VV) against colorectal cancer. Methods The CD40L-VV was obtained by integrating the sequence of CD40L into the skeleton of oncolytic vaccinia virus(VV). The tumor cells were infected with VV and CD40L-VV to verify their oncolytic activity and the expression of CD40L in vitro. After the tumor model of colorectal cancer was treated with VV and CD40L-VV, the tumor growth was monitored, and the phenotype of tumor infiltrating T cells was analyzed by flow cytometry. The anti-tumor activity of recombinant oncolytic VV was also reflected by detecting the production of cytokine and the proliferation activity of tumor infiltrating T cells. Results Microscopic observation and Western blot assay showed that CD40L-VV could effectively infect tumor cells and express CD40L. Cell viability assay showed that VV and CD40L-VV had dose-dependent lytic ability against tumor cells. The results of tumor transplantation in vivo showed that CD40L-VV had stronger ability to inhibiting tumor growth than VV. Flow cytometry showed that tumor infiltrating T cells in the CD40L-VV group had stronger cytokine secretion ability, stronger proliferative activity and more memory cell phenotypes than those in the VV group. Conclusion CD40L-VV can significantly inhibit the growth of colorectal cancer cells and enhance the anti-tumor activity of T cells in vivo.


Assuntos
Neoplasias Colorretais , Vírus Oncolíticos , Animais , Ligante de CD40/genética , Neoplasias Colorretais/genética , Neoplasias Colorretais/terapia , Camundongos , Vírus Oncolíticos/genética , Linfócitos T , Vaccinia virus/genética
13.
Neurol Res ; 43(8): 659-667, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33825678

RESUMO

Objective: The purpose of our study was to distinguish the changes in the microstructure of the cingulate cortex in patients with mild cognitive impairment (MCI) induced by cerebral small vessel disease (CSVD).Method: 80 patients were diagnosed with CSVD in this study, including 55 patients with MCI and 25 patients without MCI. Diffusion kurtosis imaging (DKI) and Montreal cognitive assessment (MoCA) were performed in all patients. The anterior cingulate gyrus, posterior cingulate gyrus and middle cingulate gyrus were selected as the regions of interest, and some parameters were recorded.Results: Compared with the non-MCI group, the MCI group mainly showed obviously higher mean diffusion (MD) and radial diffusion (RD) values (P = 0.022 and P = 0.029) but lower fractional anisotropy (FA), axial kurtosis (AK), mean kurtosis (MK) and radial kurtosis (RK) values (P = 0.047, P = 0.001, P < 0.01, and P = 0.001, respectively) in the right anterior cingulate gyrus. Meanwhile, in the right posterior cingulate gyrus, the MCI group also showed higher axial diffusion (AD) and MD (P = 0.027 and P = 0.030) and lower AK (P = 0.014). Additionally, negative correlations of AD, MD, and RD with MoCA scores and positive correlations of FA, AK, MK and RK with MoCA scores were observed in some regions of the cingulate gyrus.Conclusions: DKI is a good method to examine microstructural damage in the cingulate cortex, and some parameters of DKI may be used as imaging biomarkers to detect early MCI in patients with CSVD.


Assuntos
Doenças de Pequenos Vasos Cerebrais/complicações , Doenças de Pequenos Vasos Cerebrais/diagnóstico por imagem , Disfunção Cognitiva/diagnóstico por imagem , Disfunção Cognitiva/etiologia , Giro do Cíngulo/diagnóstico por imagem , Idoso , Feminino , Humanos , Imageamento por Ressonância Magnética/tendências , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
14.
Neurosurg Rev ; 44(5): 2923-2931, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33502641

RESUMO

Restarting of antiplatelet therapy (AT) for patients with a history of intracerebral hemorrhage (ICH) is still a clinical dilemma in China. We aimed to investigate the association between low-dose AT and the long-term clinical outcome in Chinese ICH patients. A total of 312 patients with a history of ICH were retrospectively enrolled and followed. The ischemic vascular events, recurrent ICH, and all-cause death were reviewed retrospectively. We explored the predictors of ischemic vascular events and recurrent ICH from all patients using Cox proportional hazard regression model. One hundred fifty-one (48.4%) patients were treated with low-dose AT, and the median duration of follow-up was 4.0 years (interquartile range, 2.5-5 years). Compared to 30 (19.8%) of 151 participants who restarted low-dose AT had ischemic vascular events, 51 (31.7%) of 161 participants who did not receive AT showed ischemic vascular events (p=0.025). Eighteen (11.9%) of 151 participants treated with low-dose AT had recurrent ICH and 21 (13.0%) of 161 in non-AT participants (p=0.830). Cox regression analysis also showed that diabetes mellitus was an independent risk factor for ischemic vascular events (p=0.029). Uncontrolled blood pressure (BP) was independently associated with the risk for both ischemic vascular events (p=0.025) and recurrent ICH (p=0.001). Atrial fibrillation (AF) was an independent risk factor for recurrent ICH among patients with a history of ICH (p=0.018). In a Chinese population of patients with predominantly deep, mild to moderate severity ICH, restarting of low-dose AT at a median of 6.2 months was associated with a lower risk of ischemic vascular events without increased risk of recurrent ICH.


Assuntos
Inibidores da Agregação Plaquetária , Acidente Vascular Cerebral , Hemorragia Cerebral/tratamento farmacológico , Hemorragia Cerebral/epidemiologia , China/epidemiologia , Hospitais , Humanos , Estudos Retrospectivos , Fatores de Risco
15.
Chem Biol Interact ; 337: 109394, 2021 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-33508304

RESUMO

The imbalance of SUMOylation is related to different cancers, including gastric cancer (GC). Ginkgolic acid (GA) inhibits the growth and invasion of many cancer cells, and it has been reported to restrain SUMOylation. However, the role of GA in GC and whether it functions through SUMOylation remains to be clarified. Our research revealed that GA (15:1) inhibited cell proliferation, migration, epithelial-mesenchymal transition (EMT) and overall protein SUMOylation in BGC823 and HGC27 cells. In addition, knockdown of SUMO1 (small ubiquitin-like modifier) instead of SUMO2/3 played a similar role to GA in cell behaviors. Besides, nuclear IGF-1R (insulin-like growth factor 1 receptor) expression was markedly upregulated in GC cells compared to normal gastric epithelial cells. GA prevented IGF-1R from binding to SUMO1, thereby suppressing its nuclear accumulation. Further research found that IGF-1R directly bound to SNAI2 (snail family zinc finger 2) promoter. The interference of IGF-1R downregulated the mRNA and protein levels of SNAI2, while the overexpression of SUMO1, IGF-1R and UBC9 (SUMO-conjugating enzyme) played the opposite role. Furthermore, the co-transfection of SUMO1, UBC9 and IGF-1R vectors or the overexpression of SNAI2 reversed the inhibitory effects of GA on cell proliferation, migration and EMT. Finally, GA impeded the growth of GC xenografts and decreased the expression of nuclear IGF-1R and SNAI2 in vivo. In conclusion, these findings demonstrated that GA hindered the progression of GC by inhibiting the SUMOylation of IGF-1R. Thus, GA might be a promising therapeutic for GC.


Assuntos
Proliferação de Células/efeitos dos fármacos , Transição Epitelial-Mesenquimal/efeitos dos fármacos , Receptor IGF Tipo 1/metabolismo , Salicilatos/farmacologia , Animais , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Camundongos , Camundongos Nus , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Receptor IGF Tipo 1/antagonistas & inibidores , Receptor IGF Tipo 1/genética , Proteína SUMO-1/antagonistas & inibidores , Proteína SUMO-1/genética , Proteína SUMO-1/metabolismo , Salicilatos/uso terapêutico , Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/antagonistas & inibidores , Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/genética , Proteínas Modificadoras Pequenas Relacionadas à Ubiquitina/metabolismo , Fatores de Transcrição da Família Snail/genética , Fatores de Transcrição da Família Snail/metabolismo , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patologia , Sumoilação/efeitos dos fármacos , Transplante Heterólogo
16.
Onco Targets Ther ; 13: 11795-11806, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33235466

RESUMO

BACKGROUND: Cervical cancer (CC) is the second serious health threat in women worldwide. LncRNA (ZNFX1 antisense RNA 1) ZFAS1 has been observed to abnormally express in human cancers. However, the expression pattern, clinical significance and molecular mechanism of ZFAS1 have not been thoroughly studied in CC. METHODS: qRT-PCR was performed to examine the differential expression of ZFAS1 in CC tissues and adjacent normal cervical tissues. Gain- and loss-of-function experiments were constructed to test the functional role of ZFAS1 in CC by CCK-8, colony formation, transwell and xenograft models assays. Luciferase reporter, RNA immunoprecipitation (RIP), methylated RNA immunoprecipitation (MeRIP), RNA pull-down assays were used to reveal the underlying mechanisms. RESULTS: We found that ZFAS1 was significantly upregulated in CC tissues. Elevation of ZFAS1 correlated with advanced FIGO stage, lymph node and distant metastasis, and also indicated poor overall survival in patients with CC. Functional experiments demonstrated that ZFAS1 promoted CC cell proliferation, migration and invasion in vitro, and facilitated tumor growth and metastasis in vivo. Mechanistic investigation revealed that ZAFS1 sequestered miR-647, and this RNA-RNA interaction is regulated by METLL3-mediated m6A modification. CONCLUSION: Our findings elucidate the functional roles of ZFAS1 and its m6A modification in CC cells and indicate that ZFAS1 may be a promising target for CC treatment.

17.
J Biomed Nanotechnol ; 16(10): 1504-1517, 2020 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-33422162

RESUMO

Tenofovir (TFV), an acyclic nucleoside analog, exhibits potent anti-HBV activity. However, poor bioavailability, nephrotoxicity and bone toxicity limit its further clinical application. In this work, a novel tenofovir-loaded glycyrrhetinic acidmodified cationic liposome (TGCL) was prepared for targeted therapy of HBV. The TGCL had an average particle size of 107.39 ± 1.21 nm and an entrapment efficiency of 89.83 ± 2.70% with a positive zeta potential of 37.63 ± 1.22 mV. The results of in vitro indicated that the inhibitory effects on HBsAg, HBeAg and HBV cccDNA of TGCL in HepG2.2.15 cells were significantly better than that of free TFV and non-targeted cationic liposome. In the DHBV-infected duck model, TGCL showed remarkably suppression on DHBV DNA than that of free TFV. Overall, TGCL is a promising formulation of TFV for targeted therapy of HBV.


Assuntos
Antivirais , Ácido Glicirretínico , Hepatite B , Animais , DNA Viral/uso terapêutico , Ácido Glicirretínico/uso terapêutico , Vírus da Hepatite B , Lipossomos , Tenofovir/uso terapêutico
18.
Neurosurg Rev ; 43(2): 589-595, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30706157

RESUMO

The aim of this study is to characterize demographic and morphologic characteristics of aneurysms located in the anterior communicating artery (ACoA) and to investigate possible associations between these characteristics and aneurysm rupture. We investigated 112 consecutive patients (72 ruptured and 40 unruptured) with ACoA aneurysms from a single-center database. The effects of demographic and morphologic characteristics on the risk of rupture in ACoA aneurysms were tested using univariate and multivariate logistic regression analyses, respectively. We found that larger size, greater size ratio, larger flow angle, irregular shape, and smoking of the patient were associated with the rupture of ACoA aneurysms based on univariate analysis. Size ratio (OR = 3.890, P = 0.003), irregular shape (OR = 1.068, P = 0.001), flow angle (OR = 1.054, P = 0.001), and current smoking (OR = 4.435, P = 0.009) were the strongest factors related to ruptured ACoA aneurysms based on multivariate logistic regression analysis. The areas under the curves for the flow angle and size ratio were 0.742 (95% CI 0.646-0.838; P = 0.001) and 0.736 (95% CI 0.621-0.796; P = 0.001), respectively. The strongest risk factors for rupture include size ratio, irregular shape, flow angle, and current smoking. These features should be taken into consideration to aid in the prediction of the rupture risk of ACoA aneurysms.


Assuntos
Aneurisma Roto/epidemiologia , Aneurisma Roto/patologia , Artéria Cerebral Anterior , Aneurisma Intracraniano/epidemiologia , Aneurisma Intracraniano/patologia , Hemorragia Subaracnóidea/epidemiologia , Hemorragia Subaracnóidea/patologia , Idoso , Aneurisma Roto/etiologia , Área Sob a Curva , Angiografia Cerebral , Circulação Cerebrovascular , Bases de Dados Factuais , Feminino , Humanos , Aneurisma Intracraniano/complicações , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Fumar/efeitos adversos , Hemorragia Subaracnóidea/complicações
19.
Nat Genet ; 51(7): 1099-1105, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-31182809

RESUMO

Fusarium head blight (FHB), which is mainly caused by Fusarium graminearum, is a destructive wheat disease that threatens global wheat production. Fhb1, a quantitative trait locus discovered in Chinese germplasm, provides the most stable and the largest effect on FHB resistance in wheat. Here we show that TaHRC, a gene that encodes a putative histidine-rich calcium-binding protein, is the key determinant of Fhb1-mediated resistance to FHB. We demonstrate that TaHRC encodes a nuclear protein conferring FHB susceptibility and that a deletion spanning the start codon of this gene results in FHB resistance. Identical sequences of the TaHRC-R allele in diverse accessions indicate that Fhb1 had a single origin, and phylogenetic and haplotype analyses suggest that the TaHRC-R allele most likely originated from a line carrying the Dahongpao haplotype. This discovery opens a new avenue to improve FHB resistance in wheat, and possibly in other cereal crops, by manipulating TaHRC sequence through bioengineering approaches.


Assuntos
Resistência à Doença/genética , Fusarium/fisiologia , Marcadores Genéticos , Doenças das Plantas/genética , Proteínas de Plantas/genética , Deleção de Sequência , Triticum/genética , Sequência de Aminoácidos , Mapeamento Cromossômico , Cromossomos de Plantas , Haplótipos , Filogenia , Doenças das Plantas/microbiologia , Locos de Características Quantitativas , Triticum/microbiologia
20.
World Neurosurg ; 126: e586-e605, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30831301

RESUMO

OBJECTIVE: We have discussed the clinical features and neuroimaging findings and investigated the correlations between the clinical characteristics and different neuroradiologic phenotypes of cerebral small vessel disease (CSVD). METHODS: A total of 1106 patients with a diagnosis of CSVD were enrolled. The demographic data, medical history, laboratory test results, and neuroimaging findings were retrieved for analysis. The differences in clinical parameters between patient groups were examined. The relationships between the clinical parameters and neuroradiologic phenotypes (i.e., white matter lesions [WMLs] and enlarged perivascular spaces) were assessed. The magnetic resonance imaging features were clustered using the fast clustering algorithm. RESULTS: Approximately one third of our patients presented with a lacune, which was associated with atrial fibrillation (P = 0.029), lacunar syndrome (P < 0.001), periventricular WMLs (P = 0.001), cerebral WMLs (P = 0.021), basal ganglia perivascular space grade (P < 0.001) and severity (P = 0.001), and semiovale perivascular space grade (P = 0.010) and severity (P = 0.002). Hypertension was associated with periventricular WMLs (P = 0.048), centrum semiovale WMLs (P = 0.026), and basal ganglia perivascular space grade (P < 0.001) and severity (P < 0.001). A novel clustering algorithm was derived to stratify our cohort into 3 different groups according to the differing severity of the cerebral WMLs and perivascular space enlargement. CONCLUSION: The present study has provided a comprehensive analysis of the clinical correlation of characteristics and neuroradiologic phenotypes in patients with CSVD. The insights from these findings could be used to refine the management strategy for patients with CSVD.


Assuntos
Doenças de Pequenos Vasos Cerebrais/diagnóstico por imagem , Doenças de Pequenos Vasos Cerebrais/patologia , Neuroimagem , Idoso , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Neuroimagem/métodos
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