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1.
Anal Chem ; 2024 Feb 09.
Artigo em Inglês | MEDLINE | ID: mdl-38335969

RESUMO

The combined application of nanozymes and surface-enhanced Raman scattering (SERS) provides a promising approach to obtain label-free detection. However, developing nanomaterials with both highly efficient enzyme-like activity and excellent SERS sensitivity remains a huge challenge. Herein, we proposed one-step synthesis of Mo2N nanoparticles (NPs) as a "two-in-one" substrate, which exhibits both excellent peroxidase (POD)-like activity and high SERS activity. Its mimetic POD activity can catalyze the 3,3',5,5'-tetramethylbenzidine (TMB) molecule to SERS-active oxidized TMB (ox-TMB) with high efficiency. Furthermore, combining experimental profiling with theory, the mechanism of POD-like activity and SERS enhancement of Mo2N NPs was explored in depth. Benefiting from the outstanding properties of Mo2N NPs, a versatile platform for indirect SERS detection of biomarkers was developed based on the Mo2N NPs-catalyzed product ox-TMB, which acts as the SERS signal readout. The feasibility of this platform was validated using glutathione (GSH) and target antigens alpha-fetoprotein antigen (AFP) and carcinoembryonic antigen (CEA) as representatives of small molecules with a hydroxyl radical (·OH) scavenging effect and proteins with a low Raman scattering cross-section, respectively. The limits of detection of GSH, AFP, and CEA were as low as 0.1 µmol/L, 89.1, and 74.6 pg/mL, respectively. Significantly, it also showed application in human serum samples with recoveries ranging from 96.0 to 101%. The acquired values based on this platform were compared with the standard electrochemiluminescence method, and the relative error was less than ±7.3. This work not only provides a strategy for developing highly active bifunctional nanomaterials but also manifests their widespread application for multiple biomarkers analysis.

2.
J Public Health (Oxf) ; 46(1): 107-115, 2024 Feb 23.
Artigo em Inglês | MEDLINE | ID: mdl-38264954

RESUMO

BACKGROUND: This study examined the moderating role of outdoor time on the relationship between overweight and myopia. METHODS: The data for this study was obtained from a prospective study in Shanghai, where non-myopic children wore wristwear and were followed up for 1 year. Eye examinations were performed at each visit. The modification effect was assessed on the additive scale using multivariable logistic regression, and relative excess risk due to interaction was used to calculate the modification effect. RESULTS: A total of 4683 non-myopic children were included with 32.20% being overweight at baseline. Following a 1-year period, 17.42% of children had myopia. When compared to those who spent <90 minutes outdoors, children who spent >120 had a relative risk of myopia onset that was reduced to 0.61. As time spent outdoors decreased, more risks of myopia onset were identified among overweight children than among normal children, the modification effect on the additive scale was -0.007, with ~70% of this effect attributed to the modifying influence of outdoor time. CONCLUSIONS: Increasing outdoor time can reduce myopia more among overweight children than normal. Future interventions should focus on outdoor activities among overweight children to reduce myopia risks.


Assuntos
Miopia , Obesidade Infantil , Criança , Humanos , Pré-Escolar , Seguimentos , Estudos Prospectivos , Sobrepeso/complicações , Sobrepeso/epidemiologia , Obesidade Infantil/epidemiologia , Obesidade Infantil/etiologia , Atividades de Lazer , China/epidemiologia , Miopia/epidemiologia , Miopia/etiologia , Inquéritos e Questionários
3.
Telemed J E Health ; 2024 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-39229683

RESUMO

Objective: The National Health Security Office in Thailand introduced a telemedicine program called "Telehealth/Telemedicine" in December 2020, which aimed to reimburse telemedicine services for patients with stable chronic diseases under the Universal Coverage Scheme (UCS). The current study investigated patient characteristics and trends in telemedicine service utilization under the UCS in Thailand and examined the impact of COVID-19 outbreaks on telemedicine services. Methods: A retrospective secondary data analysis using e-claim data from December 1, 2020, to April 18, 2023, was conducted. The analytical methods included descriptive analysis and an interrupted time series analysis. Results: During ∼29 months, 110,153 unique patients used telemedicine services, leading to a total of 259,047 visits. The average age was 54 years, and most of patients were female (57%). Hypertension was the most common diagnosis for patients receiving telemedicine services. Patients with mental health conditions often engaged in telemedicine consultation with drug delivery. During the Delta and Omicron outbreaks, telemedicine service utilization significantly increased compared with that in any nonpandemic periods within the 29-month timeframe (odds ratio [OR]: 3.85, p-value <0.01; OR: 2.55, p-value <0.01). Conclusions: The study findings highlight the initial trend of telemedicine services in Thailand from the start of the COVID-19 pandemic to the beginning of the post-COVID-19 period. As telemedicine will play a critical role in the future of health care, this information can support the scale-up of telemedicine, including monitoring and evaluation plans, to help improve the efficiency of the system.

4.
J Environ Manage ; 359: 121079, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38723504

RESUMO

To cope with global climate risks, promoting energy transformation has become a global consensus. China issued a reform policy in 2010 to promote the convergence of the three major information industries, namely broadcasting and television networks, telecommunications networks and the Internet (TPR policy). However, is the convergence of information industries able to promote energy transition? This study constructs a quasi-natural experimental framework using China's TPR policy as a representative case of industrial convergence. Using city-level panel data between 2003 and 2016 in China and a multi-period difference-in-differences model, this study examines the impact of TPR policy on energy transition. The results show that TPR policy positively contributes to energy transition at a 1% significance level. Extensive robustness tests support this finding. This positive effect is particularly evident in regions with less developed communications infrastructure and stricter environmental regulations. Mechanism analysis suggests that TPR policy promotes energy transition by improving the level of information networks, promoting technological innovation, and optimizing industrial structure. The findings of this paper emphasize the importance of information industry convergence in facilitating energy transformation.


Assuntos
Indústrias , China , Telecomunicações , Internet
5.
Emerg Infect Dis ; 29(5): 992-996, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36821867

RESUMO

Heartland virus (HRTV) disease is an emerging tickborne illness in the midwestern and southern United States. We describe a reported fatal case of HRTV infection in the Maryland and Virginia region, states not widely recognized to have human HRTV disease cases. The range of HRTV could be expanding in the United States.


Assuntos
Infecções por Bunyaviridae , Phlebovirus , Viroses , Estados Unidos/epidemiologia , Humanos , Infecções por Bunyaviridae/diagnóstico , Phlebovirus/genética , Mid-Atlantic Region
6.
PLoS Pathog ; 17(10): e1010007, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34653226

RESUMO

Hantavirus nucleocapsid protein (NP) inhibits protein kinase R (PKR) dimerization by an unknown mechanism to counteract its antiviral responses during virus infection. Here we demonstrate that NP exploits an endogenous PKR inhibitor P58IPK to inhibit PKR. The activity of P58IPK is normally restricted in cells by the formation of an inactive complex with its negative regulator Hsp40. On the other hand, PKR remains associated with the 40S ribosomal subunit, a unique strategic location that facilitates its free access to the downstream target eIF2α. Although both NP and Hsp40 bind to P58IPK, the binding affinity of NP is much stronger compared to Hsp40. P58IPK harbors an NP binding site, spanning to N-terminal TPR subdomains I and II. The Hsp40 binding site on P58IPK was mapped to the TPR subdomain II. The high affinity binding of NP to P58IPK and the overlap between NP and Hsp40 binding sites releases the P58IPK from its negative regulator by competitive inhibition. The NP-P58IPK complex is selectively recruited to the 40S ribosomal subunit by direct interaction between NP and the ribosomal protein S19 (RPS19), a structural component of the 40S ribosomal subunit. NP has distinct binding sites for P58IPK and RPS19, enabling it to serve as bridge between P58IPK and the 40S ribosomal subunit. NP mutants deficient in binding to either P58IPK or RPS19 fail to inhibit PKR, demonstrating that selective engagement of P58IPK to the 40S ribosomal subunit is required for PKR inhibition. Cells deficient in P58IPK mount a rapid PKR antiviral response and establish an antiviral state, observed by global translational shutdown and rapid decline in viral load. These studies reveal a novel viral strategy in which NP releases P58IPK from its negative regulator and selectively engages it on the 40S ribosomal subunit to promptly combat the PKR antiviral responses.


Assuntos
Infecções por Hantavirus/metabolismo , Interações entre Hospedeiro e Microrganismos/fisiologia , Proteínas do Nucleocapsídeo/metabolismo , eIF-2 Quinase/metabolismo , Células HEK293 , Orthohantavírus , Células HeLa , Humanos
7.
Int J Mol Sci ; 24(18)2023 Sep 07.
Artigo em Inglês | MEDLINE | ID: mdl-37762115

RESUMO

Combining pentamidine with Gram-positive-targeting antibiotics has been proven to be a promising strategy for treating infections from Gram-negative bacteria (GNB). However, which antibiotics pentamidine can and cannot synergize with and the reasons for the differences are unclear. This study aimed to identify the possible mechanisms for the differences in the synergy of pentamidine with rifampicin, linezolid, tetracycline, erythromycin, and vancomycin against GNB. Checkerboard assays were used to detect the synergy of pentamidine and the different antibiotics. To determine the mechanism of pentamidine, fluorescent labeling assays were used to measure membrane permeability, membrane potential, efflux pump activity, and reactive oxygen species (ROS); the LPS neutralization assay was used to evaluate the target site; and quantitative PCR was used to measure changes in efflux pump gene expression. Our results revealed that pentamidine strongly synergized with rifampicin, linezolid, and tetracycline and moderately synergized with erythromycin, but did not synergize with vancomycin against E. coli, K. pneumoniae, E. cloacae, and A. baumannii. Pentamidine increased the outer membrane permeability but did not demolish the outer and inner membranes, which exclusively permits the passage of hydrophobic, small-molecule antibiotics while hindering the entry of hydrophilic, large-molecule vancomycin. It dissipated the membrane proton motive force and inactivated the efflux pump, allowing the intracellular accumulation of antimicrobials that function as substrates of the efflux pump, such as linezolid. These processes resulted in metabolic perturbation and ROS production which ultimately was able to destroy the bacteria. These mechanisms of action of pentamidine on GNB indicate that it is prone to potentiating hydrophobic, small-molecule antibiotics, such as rifampicin, linezolid, and tetracycline, but not hydrophilic, large-molecule antibiotics like vancomycin against GNB. Collectively, our results highlight the importance of the physicochemical properties of antibiotics and the specific mechanisms of action of pentamidine for the synergy of pentamidine-antibiotic combinations. Pentamidine engages in various pathways in its interactions with GNB, but these mechanisms determine its specific synergistic effects with certain antibiotics against GNB. Pentamidine is a promising adjuvant, and we can optimize drug compatibility by considering its functional mechanisms.


Assuntos
Rifampina , Vancomicina , Linezolida/farmacologia , Vancomicina/farmacologia , Rifampina/farmacologia , Pentamidina/farmacologia , Escherichia coli , Espécies Reativas de Oxigênio , Antibacterianos/farmacologia , Bactérias Gram-Negativas , Tetraciclina/farmacologia , Eritromicina
8.
Int J Mol Sci ; 23(18)2022 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-36142707

RESUMO

As one of the oldest agricultural crops in China, millet (Panicum miliaceum) has powerful drought tolerance. In this study, transcriptome and metabolome analyses of 'Hequ Red millet' (HQ) and 'Yanshu No.10' (YS10) millet after 6 h of drought stress were performed. Transcriptome characteristics of drought stress in HQ and YS10 were characterized by Pacbio full-length transcriptome sequencing. The pathway analysis of the differentially expressed genes (DEGs) showed that the highly enriched categories were related to starch and sucrose metabolism, pyruvate metabolism, metabolic pathways, and the biosynthesis of secondary metabolites when the two millet varieties were subjected to drought stress. Under drought stress, 245 genes related to energy metabolism were found to show significant changes between the two strains. Further analysis showed that 219 genes related to plant hormone signal transduction also participated in the drought response. In addition, numerous genes involved in anthocyanin metabolism and photosynthesis were confirmed to be related to drought stress, and these genes showed significant differential expression and played an important role in anthocyanin metabolism and photosynthesis. Moreover, we identified 496 transcription factors related to drought stress, which came from 10 different transcription factor families, such as bHLH, C3H, MYB, and WRKY. Further analysis showed that many key genes related to energy metabolism, such as citrate synthase, isocitrate dehydrogenase, and ATP synthase, showed significant upregulation, and most of the structural genes involved in anthocyanin biosynthesis also showed significant upregulation in both strains. Most genes related to plant hormone signal transduction showed upregulated expression, while many JA and SA signaling pathway-related genes were downregulated. Metabolome analysis was performed on 'Hequ red millet' (HQ) and 'Yanshu 10' (YS10), a total of 2082 differential metabolites (DEMs) were identified. These findings indicate that energy metabolism, anthocyanins, photosynthesis, and plant hormones are closely related to the drought resistance of millet and adapt to adversity by precisely regulating the levels of various molecular pathways.


Assuntos
Antocianinas , Secas , Trifosfato de Adenosina/metabolismo , Antocianinas/metabolismo , Citrato (si)-Sintase/metabolismo , Perfilação da Expressão Gênica , Regulação da Expressão Gênica de Plantas , Isocitrato Desidrogenase/genética , Metaboloma/genética , Milhetes/genética , Milhetes/metabolismo , Reguladores de Crescimento de Plantas , Piruvatos , Amido/metabolismo , Estresse Fisiológico/genética , Sacarose , Fatores de Transcrição/metabolismo , Transcriptoma
9.
Opt Express ; 29(21): 34577-34589, 2021 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-34809244

RESUMO

The magneto-refractive properties of an erbium-doped fiber (EDF) are investigated by theoretically analyzing the change in mode characteristics with a magnetic field and experimentally measuring it based on a fiber-optic Mach-Zehnder interferometer (MZI). The numerical results indicate that the mode effective refractive index (RI) increases as the magnetic field increases, and the mode field intensity distribution tends to be more concentrated in the core region with an increasing magnetic field. The variation in the mode effective RI of the fundamental mode with the magnetic field is greater than that of the higher-order modes. A magneto-refractive measurement system based on a fiber-optic MZI is set up to analyze the magneto-refractive effect of the EDF. The changes in the mode effective RI measured with a direct-current (DC) magnetic field and with a 100 Hz alternating-current (AC) magnetic field are 4.838×10-6 and 4.245×10-6 RIU/mT, respectively. The experimental results are in reasonable agreement with the theoretical analysis. Furthermore, the error between the experimental and numerical results is discussed. The magneto-refractive properties of the EDF exhibit potential in all-fiber magnetic field or current sensing area.

10.
Med Sci Monit ; 26: e924544, 2020 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-32826847

RESUMO

BACKGROUND Neonatal hypoxic-ischemic encephalopathy (HIE) is a dreaded disease and one of the leading causes of severe neurological dysfunction in neonates. The present study explored the functions of Sirtuin-1 (SIRT1) in neonatal HIE. MATERIAL AND METHODS A HIE neonatal rat model was generated to determine SIRT1 levels in brain tissues. Cell apoptosis and cell viability were analyzed by flow cytometry and MTT assay. qRT-PCR and Western blot analysis were used to assess gene mRNA and protein levels. Subsequently, the effect of SIRT1 on HIE was investigated in vitro by constructing an oxygen-glucose deprivation (OGD) cell model. RESULTS The effective construction of the HIE rat model was confirmed by the enhanced brain cell apoptosis and the increased expression of HIE-related molecular markers, including S100 calcium-binding protein B (S100B) and neuron-specific enolase (NSE). SIRT1 expression was downregulated in HIE rat brain tissues. These findings indicated that SIRT1 was downregulated in neuronal cells subjected to OGD. In addition, enhanced cell viability and reduced cell apoptosis were observed, suggesting that SIRT1 overexpression relieved OGD-induced neuronal cell injury. Transfection with SIRT1-siRNA further increased OGD-induced neuronal cell injury, evidenced by decreased cell viability and enhanced cell apoptosis. Finally, SIRT1 overexpression significantly downregulated p-p65 protein expression. CONCLUSIONS Our findings revealed that SIRT1 may be a novel and promising therapy target for HIE treatment.


Assuntos
Regulação para Baixo/genética , Hipóxia-Isquemia Encefálica/metabolismo , Neurônios/metabolismo , Transdução de Sinais/genética , Sirtuína 1/metabolismo , Animais , Animais Recém-Nascidos , Apoptose/genética , Encéfalo/metabolismo , Encéfalo/patologia , Sobrevivência Celular/genética , Células Cultivadas , Modelos Animais de Doenças , Glucose/metabolismo , Masculino , Oxigênio/metabolismo , RNA Mensageiro/genética , RNA Interferente Pequeno/genética , Ratos , Ratos Sprague-Dawley , Sirtuína 1/genética , Transfecção
11.
J Nanobiotechnology ; 17(1): 29, 2019 Feb 19.
Artigo em Inglês | MEDLINE | ID: mdl-30782171

RESUMO

BACKGROUND: Accumulating evidence shows that microRNA-210 (miR-210) holds great promise to improve angiogenesis for brain tissue repair after cerebral ischemia. However, safe and efficient delivery of miR-210 via intravenous administration is still a challenge. In the past decade, exosomes have emerged as a novel endogenous delivery system. Here, c(RGDyK) peptide is conjugated to exosomes, and they are loaded with cholesterol-modified miR-210 (RGD-exo:miR-210). RESULTS: In a transient middle cerebral artery occlusion (MCAO) mouse model, the RGD-exo:miR-210 targets the lesion region of the ischemic brain after intravenous administration, resulting in an increase in miR-210 at the site. Furthermore, RGD-exo:miR-210 are administered once every other day for 14 days, and the expressions of integrin ß3, vascular endothelial growth factor (VEGF) and CD34 are significantly upregulated. The animal survival rate is also enhanced. CONCLUSIONS: These results suggest a strategy for the targeted delivery of miR-210 to ischemic brain and provide an angiogenic agent for the treatment of ischemic stroke.


Assuntos
Exossomos , Infarto da Artéria Cerebral Média/tratamento farmacológico , MicroRNAs/administração & dosagem , Animais , Portadores de Fármacos , Terapia Genética/métodos , Camundongos , MicroRNAs/química
12.
J Biol Chem ; 291(13): 6626-40, 2016 Mar 25.
Artigo em Inglês | MEDLINE | ID: mdl-26757816

RESUMO

The physiological role of the TGR5 receptor in the pancreas is not fully understood. We previously showed that activation of TGR5 in pancreatic ß cells by bile acids induces insulin secretion. Glucagon released from pancreatic α cells and glucagon-like peptide 1 (GLP-1) released from intestinal L cells regulate insulin secretion. Both glucagon and GLP-1 are derived from alternate splicing of a common precursor, proglucagon by PC2 and PC1, respectively. We investigated whether TGR5 activation in pancreatic α cells enhances hyperglycemia-induced PC1 expression thereby releasing GLP-1, which in turn increases ß cell mass and function in a paracrine manner. TGR5 activation augmented a hyperglycemia-induced switch from glucagon to GLP-1 synthesis in human and mouse islet α cells by GS/cAMP/PKA/cAMP-response element-binding protein-dependent activation of PC1. Furthermore, TGR5-induced GLP-1 release from α cells was via an Epac-mediated PKA-independent mechanism. Administration of the TGR5 agonist, INT-777, to db/db mice attenuated the increase in body weight and improved glucose tolerance and insulin sensitivity. INT-777 augmented PC1 expression in α cells and stimulated GLP-1 release from islets of db/db mice compared with control. INT-777 also increased pancreatic ß cell proliferation and insulin synthesis. The effect of TGR5-mediated GLP-1 from α cells on insulin release from islets could be blocked by GLP-1 receptor antagonist. These results suggest that TGR5 activation mediates cross-talk between α and ß cells by switching from glucagon to GLP-1 to restore ß cell mass and function under hyperglycemic conditions. Thus, INT-777-mediated TGR5 activation could be leveraged as a novel way to treat type 2 diabetes mellitus.


Assuntos
Ácidos Cólicos/farmacologia , Diabetes Mellitus Experimental/genética , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Glucose/metabolismo , Comunicação Parácrina/genética , Receptores Acoplados a Proteínas G/agonistas , Animais , Derivados de Benzeno/farmacologia , Benzenossulfonatos/farmacologia , Linhagem Celular , Proteínas Quinases Dependentes de AMP Cíclico/genética , Proteínas Quinases Dependentes de AMP Cíclico/metabolismo , Diabetes Mellitus Experimental/tratamento farmacológico , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Experimental/patologia , Diabetes Mellitus Tipo 2/genética , Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/patologia , Estrenos/farmacologia , Regulação da Expressão Gênica , Peptídeo 1 Semelhante ao Glucagon/biossíntese , Peptídeo 1 Semelhante ao Glucagon/genética , Células Secretoras de Glucagon/efeitos dos fármacos , Células Secretoras de Glucagon/metabolismo , Células Secretoras de Glucagon/patologia , Homeostase/efeitos dos fármacos , Humanos , Resistência à Insulina , Células Secretoras de Insulina/efeitos dos fármacos , Células Secretoras de Insulina/metabolismo , Células Secretoras de Insulina/patologia , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Pró-Proteína Convertase 1/genética , Pró-Proteína Convertase 1/metabolismo , Pró-Proteína Convertase 2/genética , Pró-Proteína Convertase 2/metabolismo , Pirrolidinonas/farmacologia , Receptores Acoplados a Proteínas G/genética , Receptores Acoplados a Proteínas G/metabolismo , Transdução de Sinais , Sulfonas/farmacologia
13.
J Basic Microbiol ; 57(12): 989-997, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28940238

RESUMO

Plants growing in soil and the diverse microorganisms with which they are in direct contact have adapted to exploit their close association for mutual benefit. Various intercropping systems have been used to control plant disease and improve productivity in fields. Although high-throughput sequencing approaches have provided new insights into the soil bacterial community, current knowledge of intercropping of broomcorn millet with different leguminous plants is limited. In this study, characterization of different bacterial communities of monoculture and intercropping systems was achieved by deep sequencing. A total of 4684 operational taxonomic units were classified to the species level with good sampling depth and sequencing coverage. The abundance of Actinobacteria, Bacteroidetes, Proteobacteria, Acidobacteria, and Gemmatimonadetes varied at different growth stages and was related to growth of the intercropped plant. According to diversity analyses, Glycomyces, Aeromicrobium, Adhaeribacter, and Streptomyces were the dominant genera. In addition, we predicted functional gene composition based on bacterial OTUs present. Functional results showed that membrane transport and nutrient metabolism was highly abundant in all samples, although abundance varied at different growth stages, which indicated these pathways might be affected by the dominant categories of bacterial community. The dynamic changes observed during intercropping of broomcorn millet with different leguminous plants suggest that soil bacterial community structure exhibits a crop species-specific pattern. Further, agronomic trait data from different broomcorn millet intercropping systems were consistent with functional results and suggest that agronomic traits may be influenced by soil bacterial communities.


Assuntos
Agricultura/métodos , Bactérias/classificação , Bactérias/isolamento & purificação , Biota , Produtos Agrícolas/crescimento & desenvolvimento , Panicum/crescimento & desenvolvimento , Microbiologia do Solo , Bactérias/genética , Sequenciamento de Nucleotídeos em Larga Escala
14.
Plant Cell Rep ; 35(11): 2381-2401, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27562382

RESUMO

KEY MESSAGE: Histochemical staining and RNA-seq data demonstrated that the ROS- and plant hormone-regulated stress responses are the key early events of narciclasine signaling in Arabidopsis root cells. Narciclasine, an amaryllidaceae alkaloid isolated from Narcissus tazetta bulbs, employs a broad range of functions on plant development and growth. However, its molecular interactions that modulate these roles in plants are not fully understood. To elucidate the global responses of Arabidopsis roots to short-term narciclasine exposure, we first measured the accumulation of H2O2 and O2- with histochemical staining, and then profiled the gene expression pattern in Arabidopsis root tips treated with 0.5 µM narciclasine across different exposure times by RNA-seq. Physiological measurements showed a significant increase in H2O2 began at 30-60 min of narciclasine treatment and O2- accumulated by 120 min. Compared with controls, 236 genes were upregulated and 54 genes were downregulated with 2 h of narciclasine treatment, while 968 genes were upregulated and 835 genes were downregulated with 12 h of treatment. The Gene Ontology analysis revealed that the differentially expressed genes were highly enriched during oxidative stress, including those involved in the "regulation of transcription", "response to oxidative stress", "plant-pathogen interaction", "ribonucleotide binding", "plant cell wall organization", and "ribosome biogenesis". Moreover, Kyoto Encyclopedia of Genes and Genomes pathway enrichment statistics suggested that carbohydrate metabolism, amino acid metabolism, amino sugar and nucleotide sugar metabolism, and biosynthesis of phenylpropanoid and secondary metabolites were significantly inhibited by 12 h of narciclasine exposure. Hence, our results demonstrate that hormones and H2O2 are important regulators of narciclasine signaling and help to uncover the factors involved in the molecular interplay between narciclasine and phytohormones in Arabidopsis root cells.


Assuntos
Alcaloides de Amaryllidaceae/metabolismo , Arabidopsis/genética , Arabidopsis/metabolismo , Perfilação da Expressão Gênica/métodos , Meristema/genética , Fenantridinas/metabolismo , Transdução de Sinais/genética , Alcaloides de Amaryllidaceae/farmacologia , Arabidopsis/efeitos dos fármacos , Regulação da Expressão Gênica de Plantas/efeitos dos fármacos , Genes de Plantas , Proteínas de Choque Térmico/genética , Proteínas de Choque Térmico/metabolismo , Peróxido de Hidrogênio/metabolismo , Meristema/citologia , Meristema/efeitos dos fármacos , Fenantridinas/farmacologia , Células Vegetais/efeitos dos fármacos , Células Vegetais/metabolismo , Reguladores de Crescimento de Plantas/metabolismo , Reação em Cadeia da Polimerase em Tempo Real , Reprodutibilidade dos Testes , Explosão Respiratória/efeitos dos fármacos , Análise de Sequência de RNA , Transdução de Sinais/efeitos dos fármacos , Estresse Fisiológico/efeitos dos fármacos , Estresse Fisiológico/genética , Superóxidos/metabolismo
15.
PLoS One ; 19(3): e0300345, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38547133

RESUMO

As China continues to implement its progressive fertility promotion policy, there has been a drastic decline in the fertility rate. Given that the migrant population constitutes more than a quarter of China's total population, enhancing the willingness of this demographic to have additional children through policy-guided urban public services is pivotal for optimizing China's population development strategy. This study analyzes the influence of urban public services on the reproductive intentions of the migrant population, utilizing data from 110,667 migrant families with one child, drawn from China's Migrant Population Dynamic Monitoring data in 2016 and 2018. The data analysis reveals several key findings: (1) Urban public services, overall, exhibit a notable positive effect on the willingness of the migrant population to have more children, albeit with limitations and a declining trend. (2) Among urban public services, primary basic education significantly impacts the willingness of the migrant population to expand their families. (3) Large cities have created a 'reverse screening' effect on the migrant population, leading to differential access to public services. This scenario caters effectively to the high human capital migrant individuals while reducing accessibility to livelihood public services for the low human capital migrant population. This paper critically evaluates China's progressively adjusted fertility policy from the perspective of the migrant population. It underscores the necessity of establishing a comprehensive fertility support policy system across China.


Assuntos
Intenção , Migrantes , Criança , Humanos , Dinâmica Populacional , Demografia , Política Pública , Fertilidade , China/epidemiologia , População Urbana
16.
Appl Health Econ Health Policy ; 22(3): 331-341, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38376793

RESUMO

BACKGROUND: In health economic evaluations, model parameters are often dependent on other model parameters. Although methods exist to simulate multivariate normal (MVN) distribution data and estimate transition probabilities in Markov models while considering competing risks, they are technically challenging for health economic modellers to implement. This tutorial introduces easily implementable applications for handling dependent parameters in modelling. METHODS: Analytical proofs and proposed simplified methods for handling dependent parameters in typical health economic modelling scenarios are provided, and implementation of these methods are illustrated in seven examples along with the SAS and R code. RESULTS: Methods to quantify the covariance and correlation coefficients of correlated variables based on published summary statistics and generation of MVN distribution data are demonstrated using examples of physician visits data and cost component data. The use of univariate normal distribution data instead of MVN distribution data to capture population heterogeneity is illustrated based on the results from multiple regression models with linear predictors, and two examples are provided (linear fixed-effects model and Cox proportional hazards model). A conditional probability method is introduced to handle two or more state transitions in a single Markov model cycle and applied in examples of one- and two-way state transitions. CONCLUSIONS: This tutorial proposes an extension of routinely used methods along with several examples. These simplified methods may be easily applied by health economic modellers with varied statistical backgrounds.


Assuntos
Modelos Econômicos , Humanos , Probabilidade , Modelos Lineares , Análise Custo-Benefício
17.
Br J Ophthalmol ; 2024 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-39122352

RESUMO

PURPOSE: To assess the effect of weekly 1% atropine use on children's myopia progression and whether the effect is sustainable. METHODS: Medical records of myopic children aged 3-15 years receiving weekly 1% atropine for more than 1 year were retrospectively reviewed. Axial length (AL) and spherical equivalent refraction (SER) at every visit were collected. The changes in AL or SER over time were analysed using generalised estimating equation. The related factors of myopic progression were performed by multiple linear regression. The performance of short-term AL change to predict atropine-poor responders (AL change >0.2 mm/year) was assessed using receiver operating characteristic analysis. RESULTS: A total of 694 participants with a mean age of 8.83 years were included. The participants with follow-up time reached 1, 2, 3 and 4 years were 256 (36.9%), 250 (36.0%), 143 (20.6%) and 45 (6.5%) separately. The cumulative change in AL was 0.05 mm, 0.24 mm, 0.47 mm, 0.56 mm separately for 1-year, 2-year, 3-year and 4- year treatment. Approximate 0.20 mm elongation per year was observed since the second-year of the treatment. Older age and lower initial myopic refraction were independently associated with less myopic progression. A decrease in AL of more than 0.04 mm during the initial 2 months could serve as an indicator for identifying fast progressors (AL change >0.2 mm/year) over a 2-year period, with sensitivity and specificity rates of 0.78 and 0.73, respectively. CONCLUSION: Weekly 1% atropine may be a potentially effective treatment with longer lasting effects for children with myopia control especially in those with older age and lower myopia.

18.
Plants (Basel) ; 13(13)2024 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-38999669

RESUMO

In order to clarify the effect of different fertilizers on foxtail millet quality under low nitrogen conditions, we used JGNo.21 and LZGNo.2 as experimental materials and set up five treatments, including non-fertilization, nitrogen, phosphorus, compound, and organic fertilizers, to study the regulation of different fertilizer types on agronomic traits, nutrient fractions, and pasting characteristics of foxtail millet under low nitrogen conditions. Compared with the control, all of the fertilizers improved the agronomic traits of JGNo.21 to a certain extent. Nitrogen and compound fertilizer treatments reduced the starch content of JGNo.21; the starch content was reduced by 0.55% and 0.07% under nitrogen and compound fertilizers treatments. Phosphorus and organic fertilizers increased starch content, and starch content increased by 0.50% and 0.56% under phosphorus and organic fertilizer treatments. The effect of each fertilizer treatment on protein content was completely opposite to that of starch; different fertilizer treatments reduced the fat content of JGNo.21 and increased the fiber content. Among them, nitrogen and phosphorus fertilizers increased the yellow pigment content; the yellow pigment content increased by 1.21% and 2.64% under nitrogen and phosphorus fertilizer treatments. Organic and compound fertilizers reduced the content of yellow pigment; the yellow pigment content was reduced by 3.36% and 2.79% under organic and compound fertilizer treatments. Nitrogen and organic fertilizers increased the fat content of LZGNo.2; the fat content increased by 2.62% and 1.98% under nitrogen, organic fertilizer treatment. Compound and phosphorus fertilizer decreased the fat content; the fat content decreased by 2.16% and 2.90% under compound and phosphorus fertilizer treatment. Different fertilizer treatments reduced the cellulose and yellow pigment content of LZGNo.2. The content of essential, non-essential, and total amino acids of JGNo.21 was increased under compound and nitrogen fertilizer treatments and decreased under organic and phosphorus fertilizer treatments. The content of essential, non-essential, and total amino acids of LZGNo.2 was significantly higher under compound, nitrogen, and organic fertilizer treatments compared with control and significantly decreased under phosphorus fertilizer treatments. Nitrogen and compound fertilizer treatments significantly reduced the values of peak viscosity, trough viscosity, breakdown viscosity, final viscosity, setback viscosity, and pasting time of each index of JGNo.21; phosphorus and organic fertilizer treatments improved the values of each index. In contrast, the pasting viscosity of LZGNo.2 increased under phosphorus fertilizer treatment and decreased under nitrogen fertilizer treatment. Reasonable fertilization can improve the quality of foxtail millet, which provides a scientific theoretical basis for improving the quality of foxtail millet.

19.
Telemed Rep ; 5(1): 237-246, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39143956

RESUMO

Introduction: COVID-19 has accelerated the adoption of telemedicine for counseling, follow-up examination, and treatment purposes. The official guidelines in Thailand were launched to regulate or frame the protocols for health care professions and teams in different organizations. Objectives: To explore the trend of telemedicine utilization in selected hospitals in Thailand and to understand the characteristics of patients who used telemedicine from 2020 to 2023. Methods: This retrospective secondary data analysis was conducted in four hospitals in Thailand: two tertiary care (T1 and T2) hospitals, one secondary care (SN) hospital, and one specialized (SP) hospital. Data were routinely collected when services were provided and were categorized into telemedicine outpatient department (OPD) visits or onsite OPD visits. The data included demographic information (age, sex), date and year of service, location (province and health region), and primary diagnosis (using International Statistical Classification of Diseases and Related Health Problems 10th Revision codes). Descriptive analysis was conducted using R and STATA software. Results: All four hospitals reported an increase in telemedicine use from 2020 to 2023. The majority of telemedicine users were female (>65%) at all hospitals except for the SP hospital (44%). Participants aged 25-59 years reported greater utilization of telemedicine than did the other age-groups. The within-hospital comparison between OPD visits before and after telemedicine was significant (p < 0.001). Conclusion: The situation during the COVID-19 pandemic and the transition to the post-COVID-19 era impacted telemedicine utilization, which could support national monitoring and evaluation policies. However, further studies are needed to explore other aspects, including changes in telemedicine utilization over time for longer timeframes, effectiveness of telemedicine, and consumer satisfaction.

20.
ACS Infect Dis ; 10(8): 2860-2869, 2024 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-39073350

RESUMO

The continuous rise of multidrug-resistant (MDR) Gram-negative bacteria poses a severe threat to public health worldwide. Colistin(COL), employed as the last-line antibiotic against MDR pathogens, is now at risk due to the emergence of colistin-resistant (COL-R) bacteria, potentially leading to adverse patient outcomes. In this study, synergistic activity was observed when colistin and diclofenac sodium (DS) were combined and used against clinical COL-R strains of Escherichia coli (E. coli), Klebsiella pneumoniae (K. pneumoniae), Acinetobacter baumannii (A. baumannii), and Pseudomonas aeruginosa (P. aeruginosa) both in vitro and in vivo. The checkerboard method and time-killing assay showed that DS, when combined with COL, exhibited enhanced antibacterial activity compared to DS and COL monotherapies. Crystal violet staining and scanning electron microscopy showed that COL-DS inhibited biofilm formation compared with monotherapy. The in vivo experiment showed that the combination of DS and COL reduced bacterial loads in infected mouse thighs. Synergistic activity was observed when COL and DS were use in combination against clinical COL-R strains of E. coli, K. pneumoniae, A. baumannii and P. aeruginosa both in vitro and in vivo. The synergistic antibacterial effect of the COL-DS combination has been confirmed by performing various in vitro and in vivo experiments, which provides a new treatment strategy for infections caused by MDR bacteria.


Assuntos
Antibacterianos , Colistina , Diclofenaco , Sinergismo Farmacológico , Bactérias Gram-Negativas , Testes de Sensibilidade Microbiana , Colistina/farmacologia , Animais , Antibacterianos/farmacologia , Diclofenaco/farmacologia , Camundongos , Bactérias Gram-Negativas/efeitos dos fármacos , Biofilmes/efeitos dos fármacos , Farmacorresistência Bacteriana Múltipla , Acinetobacter baumannii/efeitos dos fármacos , Pseudomonas aeruginosa/efeitos dos fármacos , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Infecções por Bactérias Gram-Negativas/microbiologia , Klebsiella pneumoniae/efeitos dos fármacos , Escherichia coli/efeitos dos fármacos , Humanos , Quimioterapia Combinada , Feminino
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