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1.
Nature ; 624(7992): 557-563, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37913815

RESUMO

Perovskite solar cells with the formula FA1-xCsxPbI3, where FA is formamidinium, provide an attractive option for integrating high efficiency, durable stability and compatibility with scaled-up fabrication. Despite the incorporation of Cs cations, which could potentially enable a perfect perovskite lattice1,2, the compositional inhomogeneity caused by A-site cation segregation is likely to be detrimental to the photovoltaic performance of the solar cells3,4. Here we visualized the out-of-plane compositional inhomogeneity along the vertical direction across perovskite films and identified the underlying reasons for the inhomogeneity and its potential impact for devices. We devised a strategy using 1-(phenylsulfonyl)pyrrole to homogenize the distribution of cation composition in perovskite films. The resultant p-i-n devices yielded a certified steady-state photon-to-electron conversion efficiency of 25.2% and durable stability.

2.
Nano Lett ; 24(20): 6084-6091, 2024 May 22.
Artigo em Inglês | MEDLINE | ID: mdl-38717110

RESUMO

Chiral perovskites play a pivotal role in spintronics and optoelectronic systems attributed to their chiral-induced spin selectivity (CISS) effect. Specifically, they allow for spin-polarized charge transport in spin light-emitting diodes (LEDs), yielding circularly polarized electroluminescence at room temperature without external magnetic fields. However, chiral lead bromide-based perovskites have yet to achieve high-performance green emissive spin-LEDs, owing to limited CISS effects and charge transport. Herein, we employ dimensional regulation and Sn2+-doping to optimize chiral bromide-based perovskite architecture for green emissive spin-LEDs. The optimized (PEA)x(S/R-PRDA)2-xSn0.1Pb0.9Br4 chiral perovskite film exhibits an enhanced CISS effect, higher hole mobility, and better energy level alignment with the emissive layer. These improvements allow us to fabricate green emissive spin-LEDs with an external quantum efficiency (EQE) of 5.7% and an asymmetry factor |gCP-EL| of 1.1 × 10-3. This work highlights the importance of tailored perovskite architectures and doping strategies in advancing spintronics for optoelectronic applications.

3.
World J Urol ; 42(1): 17, 2024 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-38197976

RESUMO

PURPOSE: Kidney stone disease (KSD) is a common urological disease, but its pathogenesis remains unclear. In this study, we screened KSD-related hub genes using bioinformatic methods and predicted the related pathways and potential drug targets. METHODS: The GSE75542 and GSE18160 datasets in the Gene Expression Omnibus (GEO) were selected to identify common differentially expressed genes (DEGs). We conducted Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses to identify enriched pathways. Finally, we constructed a hub gene-miRNA network and drug-DEG interaction network. RESULTS: In total, 44 upregulated DEGs and 1 downregulated DEG were selected from the GEO datasets. Signaling pathways, such as leukocyte migration, chemokine activity, NF-κB, TNF, and IL-17, were identified in GO and KEGG. We identified 10 hub genes using Cytohubba. In addition, 21 miRNAs were predicted to regulate 4 or more hub genes, and 10 drugs targeted 2 or more DEGs. LCN2 expression was significantly different between the GEO datasets. Quantitative real-time polymerase chain reaction (qRT-PCR) analyses showed that seven hub gene expressions in HK-2 cells with CaOx treatment were significantly higher than those in the control group. CONCLUSION: The 10 hub genes identified, especially LCN2, may be involved in kidney stone occurrence and development, and may provide new research targets for KSD diagnosis. Furthermore, KSD-related miRNAs may be targeted for the development of novel drugs for KSD treatment.


Assuntos
Cálculos Renais , MicroRNAs , Humanos , Cálculos Renais/tratamento farmacológico , Cálculos Renais/genética , MicroRNAs/genética , Biomarcadores , Movimento Celular , Biologia Computacional
4.
J Am Chem Soc ; 145(50): 27774-27787, 2023 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-38079498

RESUMO

Solid electrolytes (SEs) are central components that enable high-performance, all-solid-state lithium batteries (ASSLBs). Amorphous SEs hold great potential for ASSLBs because their grain-boundary-free characteristics facilitate intact solid-solid contact and uniform Li-ion conduction for high-performance cathodes. However, amorphous oxide SEs with limited ionic conductivities and glassy sulfide SEs with narrow electrochemical windows cannot sustain high-nickel cathodes. Herein, we report a class of amorphous Li-Ta-Cl-based chloride SEs possessing high Li-ion conductivity (up to 7.16 mS cm-1) and low Young's modulus (approximately 3 GPa) to enable excellent Li-ion conduction and intact physical contact among rigid components in ASSLBs. We reveal that the amorphous Li-Ta-Cl matrix is composed of LiCl43-, LiCl54-, LiCl65- polyhedra, and TaCl6- octahedra via machine-learning simulation, solid-state 7Li nuclear magnetic resonance, and X-ray absorption analysis. Attractively, our amorphous chloride SEs exhibit excellent compatibility with high-nickel cathodes. We demonstrate that ASSLBs comprising amorphous chloride SEs and high-nickel single-crystal cathodes (LiNi0.88Co0.07Mn0.05O2) exhibit ∼99% capacity retention after 800 cycles at ∼3 C under 1 mA h cm-2 and ∼80% capacity retention after 75 cycles at 0.2 C under a high areal capacity of 5 mA h cm-2. Most importantly, a stable operation of up to 9800 cycles with a capacity retention of ∼77% at a high rate of 3.4 C can be achieved in a freezing environment of -10 °C. Our amorphous chloride SEs will pave the way to realize high-performance high-nickel cathodes for high-energy-density ASSLBs.

5.
Cell Immunol ; 385: 104688, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36774675

RESUMO

The adoptive transfer of ex vivo generated myeloid-derived suppressor cells (MDSCs) may be a promising therapeutic strategy for preventing allograft rejection after solid organ transplantation. Currently, the precise role of immune-metabolic pathways in the differentiation and function of MDSCs is not fully understood. Hexokinase 2 (HK2) is an isoform of hexokinase and is a key enzyme involved in the increased aerobic glycolysis of different immune cells during their activation and function. Here, we demonstrate that the addition of HK2 inhibitor 3-Bromopyruvic acid (3-BrPA) into traditional MDSCs induction system in vitro significantly promoted MDSCs production and enhanced their immunosuppressive function. Treatment with 3-BrPA increased the expression of MDSC-related immunosuppressive molecules, such as iNOS, Arg1, and CXCR2. Moreover, the adoptive transfer of 3-BrPA-treated MDSCs significantly prolonged the survival time of mouse heart allografts. This study provides a novel strategy to solve the problems of harvesting enough autologous cells for MDSC production from sick patients, and producing functionally enhanced MDSCs for preventing graft rejection and inducing tolerance.


Assuntos
Células Supressoras Mieloides , Transplante de Órgãos , Camundongos , Animais , Hexoquinase/metabolismo , Imunossupressores/farmacologia , Diferenciação Celular
6.
Toxicol Appl Pharmacol ; 460: 116364, 2023 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-36621722

RESUMO

BACKGROUND: Sepsis is defined as a life-threatening organ dysfunction caused by dysregulation of the host response to infection. There is still a lack of specific treatment for sepsis. Here, we report that Fibroblast growth factor-2 (FGF2) can reduce the mortality of sepsis by ameliorating the coagulation abnormalities. METHODS: FGF2 was intraperitoneally injected into septic mice induced by lipopolysaccharide (LPS) and then assessed for coagulation response, organ damage and survival. RAW264.7 cells with or without FGF2 pretreating were exposed to LPS, and then changes in coagulation related factors expression and signaling were tested. RESULTS: The findings showed that intraperitoneal injection of FGF2 inhibited coagulation activity, reduced lung and liver damage, and increased survival in septic mice. In RAW264.7 cells, LPS upregulated the expression of tissue factor (TF) and plasminogen activator inhibitor-1 (PAI-1); however, pretreatment with FGF2 prevented this upregulation, while FGF2 knockdown exacerbated TF upregulation. Moreover, FGF2 suppressing the AKT/mTOR/S6K1 signaling pathway in septic mice and RAW264.7 cells stimulated by LPS. CONCLUSIONS: This study revealed a therapeutic role of FGF2 in ameliorating the coagulation abnormalities during sepsis.


Assuntos
Fator 2 de Crescimento de Fibroblastos , Sepse , Camundongos , Animais , Fator 2 de Crescimento de Fibroblastos/uso terapêutico , Lipopolissacarídeos/farmacologia , Transdução de Sinais , Coagulação Sanguínea
7.
Angew Chem Int Ed Engl ; 62(5): e202213932, 2023 Jan 26.
Artigo em Inglês | MEDLINE | ID: mdl-36353929

RESUMO

Ion migration is a notorious phenomenon observed in ionic perovskite materials. It causes several severe issues in perovskite optoelectronic devices such as instability, current hysteresis, and phase segregation. Here, we report that, in contrast to lead halide perovskites (LHPs), no ion migration or phase segregation was observed in tin halide perovskites (THPs) under illumination or an electric field. The origin is attributed to a much stronger Sn-halide bond and higher ion migration activation energy (Ea ) in THPs, which remain nearly constant under illumination. We further figured out the threshold Ea for the absence of ion migration to be around 0.65 eV using the CsSny Pb1-y (I0.6 Br0.4 )3 system whose Ea varies with Sn ratios. Our work shows that ion migration does not necessarily exist in all perovskites and suggests metallic doping to be a promising way of stopping ion migration and improving the intrinsic stability of perovskites.

8.
Angew Chem Int Ed Engl ; 62(50): e202313447, 2023 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-37885102

RESUMO

Ether-based electrolytes are considered as an ideal electrolyte system for sodium metal batteries (SMBs) due to their superior compatibility with the sodium metal anode (SMA). However, the selection principle of ether solvents and the impact on solid electrolyte interphase formation are still unclear. Herein, we systematically compare the chain ether-based electrolyte and understand the relationship between the solvation structure and the interphasial properties. The linear ether solvent molecules with different terminal group lengths demonstrate remarkably distinct solvation effects, thus leading to different electrochemical performance as well as deposition morphologies for SMBs. Computational calculations and comprehensive characterizations indicate that the terminal group length significantly regulates the electrolyte solvation structure and consequently influences the interfacial reaction mechanism of electrolytes on SMA. Cryogenic electron microscopy clearly reveals the difference in solid electrolyte interphase in various ether-based electrolytes. As a result, the 1,2-diethoxyethane-based electrolyte enables a high Coulombic efficiency of 99.9 %, which also realizes the stable cycling of Na||Na3 V2 (PO4 )3 full cell with a mass loading of ≈9 mg cm-2 over 500 cycles.

9.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 53(6): 1068-1073, 2022 Nov.
Artigo em Zh | MEDLINE | ID: mdl-36443054

RESUMO

Objective: To investigate the dietary nutrient intake and the nutritional status of children with Duchenne muscular dystrophy (DMD), and to explore the correlation between them, so as to provide theoretical basis for the formulation of proper nutritional treatment for children with DMD. Methods: A total of 223 children aged 2 to 14 years who came to West China Second University Hospital, Sichuan University from July 2017 to April 2021, and who were diagnosed with DMD by genetic testing were enrolled as the subjects of the study. Dietary assessment was conducted with a 3-day 24-hour dietary recall, and serum vitamin D level was measured by chemiluminescence method. Results: Only 33.2% of the children with DMD were found to be of normal nutritional status. The incidences of stunted growth, underweight, overweight and obesity were 13.5%, 14.4%, 14.3% and 8.1%, respectively. Among the children with DMD, those with serum vitamin D deficiency and insufficiency accounted for 9.0% and 89.7%, respectively. According to the dietary recall of the children with MDM, the daily energy ratio of carbohydrate, protein and fat were (47.40±6.64)%, (14.46±2.22)%, and (38.17±5.30)%, respectively. The daily intake of dietary calcium and vitamin D were (433.32±164.39) mg per day and (155.73±89.30) IU per day, respectively. The ratio of daily protein intake to the estimated average requirement for protein ( P=0.003) and ratio of daily energy intake to the estimated energy requirement ( P=0.007) were lower in children with stunted growth than those of DMD children of normal nutritional status. Conclusion: The dietary structure of children with DMD is obviously not suited to their condition and nutritional deficiency coexists with overnutrition among them. Further research needs to be done for developing appropriate nutritional guidance programs and standardized nutritional management measures for children with DMD.


Assuntos
Distrofia Muscular de Duchenne , Estado Nutricional , Criança , Humanos , Estudos Transversais , Distrofia Muscular de Duchenne/complicações , Distrofia Muscular de Duchenne/epidemiologia , Ingestão de Energia , Ingestão de Alimentos , Transtornos do Crescimento , China/epidemiologia , Vitamina D
10.
Zhongguo Dang Dai Er Ke Za Zhi ; 23(2): 186-191, 2021 Feb.
Artigo em Zh | MEDLINE | ID: mdl-33627216

RESUMO

OBJECTIVE: To study the clinical application of the modified nutritional risk screening tool and nutrition assessment in pediatric patients in China, and to provide a theoretical basis for establishing a standardized nutritional management process for pediatric patients. METHODS: A retrospective analysis was performed for the nutritional risk screening and nutrition assessment data of 16 249 hospitalized children. According to the degree of nutritional risk, the children were divided into a high nutritional risk group with 588 children, a moderate nutritional risk group with 4 330 children, and a non-nutritional risk group with 11 331 children. Nutrition assessment results were compared between groups. The composition of nutritional risk screening scores and the impact of nutritional risk screening on the rate of nutrition support therapy were analyzed. RESULTS: The incidence rate of nutritional risk was 30.27% (4 918/16 249), and the incidence rates of malnutrition and overnutrition were 27.37% (4 448/16 249) and 11.29% (1 834/16 249), respectively. Nutrition assessment results were significantly correlated with nutritional risk (≥ 5 years old:rs=0.313, P < 0.05; < 5 years old:rs=-0.304, P < 0.05). There was a significant difference in the composition of scoring items between the groups with different nutritional risks (P < 0.05). With the implementation of nutritional risk screening, there was a gradual increase in the rate of nutrition support therapy year by year (P < 0.05). CONCLUSIONS: There is a high incidence rate of nutritional risk in hospitalized children. The use of the modified pediatric nutritional risk screening tool can promote the implementation of standardized nutritional management.


Assuntos
Desnutrição , Avaliação Nutricional , Criança , Pré-Escolar , China/epidemiologia , Humanos , Estado Nutricional , Estudos Retrospectivos
11.
Xenotransplantation ; 26(4): e12517, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-31033064

RESUMO

The role of complement in xenotransplantation is well-known and is a topic that has been reviewed previously. However, our understanding of the immense complexity of its interaction with other constituents of the innate immune response and of the coagulation, adaptive immune, and inflammatory responses to a xenograft is steadily increasing. In addition, the complement system plays a function in metabolism and homeostasis. New reviews at intervals are therefore clearly warranted. The pathways of complement activation, the function of the complement system, and the interaction between complement and coagulation, inflammation, and the adaptive immune system in relation to xenotransplantation are reviewed. Through several different mechanisms, complement activation is a major factor in contributing to xenograft failure. In the organ-source pig, the detrimental influence of the complement system is seen during organ harvest and preservation, for example, in ischemia-reperfusion injury. In the recipient, the effect of complement can be seen through its interaction with the immune, coagulation, and inflammatory responses. Genetic-engineering and other therapeutic methods by which the xenograft can be protected from the effects of complement activation are discussed. The review provides an updated source of reference to this increasingly complex subject.


Assuntos
Ativação do Complemento , Xenoenxertos/imunologia , Transplante Heterólogo , Imunidade Adaptativa , Animais , Animais Geneticamente Modificados , Anticorpos Heterófilos/imunologia , Coagulação Sanguínea , Fatores de Coagulação Sanguínea/fisiologia , Plaquetas/fisiologia , Proteínas do Sistema Complemento/imunologia , Endotélio Vascular/imunologia , Rejeição de Enxerto/imunologia , Rejeição de Enxerto/prevenção & controle , Humanos , Imunossupressores/uso terapêutico , Inflamassomos/metabolismo , Inflamação/metabolismo , Primatas , Receptores de Complemento/imunologia , Suínos , Coleta de Tecidos e Órgãos , Imunologia de Transplantes
13.
Pharmacology ; 98(3-4): 99-110, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27174236

RESUMO

The pharmacological effects and underlying mechanisms of natakalim, a novel SUR2B/Kir6.1-KATP channel opener, against chronic heart failure induced by isoproterenol in rats were investigated. Male Wistar rats were administered isoproterenol subcutaneously (85 mg/kg, 7 days) to induce chronic heart failure and were then treated with natakalim or saline for 6 weeks. Their blood pressure, heart rates and cardiac functions were measured using an 8-channel physiological recorder. Sophisticated technologies such as histological analysis, ELISA, radioimmunoassay, immunohistochemistry, real-time PCR and western blotting were employed for analysis. Natakalim (1, 3, 9 mg/kg/day, orally) or saline was administered for 6 weeks orally via a gastric tube to rats that had been injected with isoproterenol. Natakalim remarkably inhibited changes in left ventricular hemodynamic parameters and decreased the heart mass index, the left ventricular weight index, right ventricular weight index and lung weight index. Histological examination demonstrated no significant hypertrophy or fibrosis in the hearts of the natakalim-treated rats. Mechanistically, natakalim attenuates the elevation of plasma nitric oxide (NO) level and inducible NO synthase in cardiac tissue induced by isoproterenol. Additionally, natakalim inhibits the endothelin signaling system by decreasing both the content of endothelin-1 in the plasma and the protein levels of cardiac endothelin receptors A and B. Moreover, natakalim could augment the plasma prostacyclin concentration. In conclusion, our study provides evidence that natakalim effectively ameliorates isoproterenol-induced chronic heart failure in rats by protecting against endothelial dysfunction.


Assuntos
Compostos Alílicos/uso terapêutico , Cardiotônicos/uso terapêutico , Endotélio Vascular/efeitos dos fármacos , Insuficiência Cardíaca/induzido quimicamente , Insuficiência Cardíaca/prevenção & controle , Isoproterenol/toxicidade , Propilaminas/uso terapêutico , Compostos Alílicos/farmacologia , Animais , Cardiotônicos/farmacologia , Relação Dose-Resposta a Droga , Endotélio Vascular/metabolismo , Endotélio Vascular/patologia , Insuficiência Cardíaca/metabolismo , Insuficiência Cardíaca/patologia , Masculino , Propilaminas/farmacologia , Ratos , Ratos Wistar
14.
Plant Cell Physiol ; 56(12): 2381-95, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26615033

RESUMO

SIZ1-mediated SUMOylation regulates hormone signaling as well as abiotic and biotic stress responses in plants. Here, we investigated the expression profile of OsSIZ1 in rice using quantitative reverse transcription-PCR (qRT-PCR) and pOsSIZ1-GUS transgenic plants, and the function of OsSIZ1 in the responses to phosphate and nitrogen using a reverse genetics approach. OsSIZ1 is constitutively expressed throughout the vegetative and reproductive growth of rice, with stronger promoter activities in vascular bundles of culms. ossiz1 mutants had shorter primary roots and adventitious roots than wild-type plants, suggesting that OsSIZ1 is associated with the regulation of root system architecture. Total phosphorus (P) and phosphate (Pi) concentrations in both roots and shoots of ossiz1 mutants were significantly increased irrespective of Pi supply conditions compared with the wild type. Pi concentration in the xylem sap of ossiz1 mutants was significantly higher than that of the wild type under a Pi-sufficient growth regime. Total nitrogen (N) concentrations in the most detected tissues of ossiz1 mutants were significantly increased compared with the wild type. Analysis of mineral contents in ossiz1 mutants indicated that OsSIZ1 functions specifically in Pi and N responses, not those of other nutrients examined, in rice. Further, qRT-PCR analyses revealed that the expression of multiple genes involved in Pi starvation signaling and N transport and assimilation were altered in ossiz1 mutants. Together, these results suggested that OsSIZ1 may act as a regulator of the Pi (N)-dependent responses in rice.


Assuntos
Genes de Plantas , Nitrogênio/farmacologia , Oryza/enzimologia , Oryza/genética , Fosfatos/farmacologia , Proteínas de Plantas/genética , Ubiquitina-Proteína Ligases/genética , Perfilação da Expressão Gênica , Regulação da Expressão Gênica de Plantas/efeitos dos fármacos , Mutação/genética , Oryza/efeitos dos fármacos , Oryza/crescimento & desenvolvimento , Fósforo/metabolismo , Folhas de Planta/efeitos dos fármacos , Folhas de Planta/genética , Proteínas de Plantas/metabolismo , Raízes de Plantas/anatomia & histologia , Raízes de Plantas/efeitos dos fármacos , Brotos de Planta/efeitos dos fármacos , Brotos de Planta/metabolismo , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/genética , Ubiquitina-Proteína Ligases/metabolismo
15.
Analyst ; 140(8): 2664-70, 2015 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-25728760

RESUMO

Aptamers have attracted much attention due to their ability to bind to target molecules with high affinity and specificity. The development of an approach capable of efficiently generating aptamers through systematic evolution of ligands by exponential enrichment (SELEX) is particularly challenging. Herein, a fraction collection approach in capillary electrophoresis SELEX (FCE-SELEX) for the partition of a bound DNA-target complex is developed. By integrating fraction collection with a facile oil seal method for avoiding contamination while amplifying the bound DNA-target complex, in a single round of selection, a streptavidin-binding aptamer (SBA) has been generated. The affinity of aptamer SBA-36 for streptavidin (SA) is determined as 30.8 nM by surface plasmon resonance (SPR). Selectivity and biotin competition experiments demonstrate that the SBA-36 aptamer selected by FCE-SELEX is as efficient as those from other methods. Based on the ability of fraction collection in partition and collection of the aptamer-target complex from the original DNA library, FCE-SELEX can be a universal tool for the development of aptamers.


Assuntos
Aptâmeros de Nucleotídeos/metabolismo , Eletroforese Capilar/métodos , Técnica de Seleção de Aptâmeros/métodos , Aptâmeros de Nucleotídeos/química , Humanos , Modelos Moleculares , Conformação de Ácido Nucleico , Estreptavidina/metabolismo
16.
Med Sci Monit ; 21: 1548-55, 2015 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-26017478

RESUMO

BACKGROUND: MicroRNA-19a (miR-19a), an oncogenic microRNA, has been recently reported to target CD22 in B cell lymphoma cell lines, but its role in inflammatory response is unclear. CD22 is a negative regulator for BCR signaling, and we hypothesize that miR-19a regulates B cell response by targeting CD22 in sepsis. MATERIAL AND METHODS: In order to determine whether miR-19a-CD22 pathway was involved in sepsis, and what role it played in the regulatory mechanisms, we detected the levels of miR-19a in B cells obtained from patients with sepsis, and measured the levels of miR-19a and CD22 expression in B cells activated by LPS in vitro. Additionally, we investigated the correlation between miR-19a and CD22, as well as the influence of this pathway on BCR signaling, in transfected B cells. RESULTS: We found that septic patients displayed up-regulated miR-19a in B cells. In vitro, miR-19a was increased in activated B cells, with CD22 expression initially enhanced but subsequently decreased. Moreover, overexpression of miR-19a resulted in an amplified BCR signaling, while overexpression of CD22 attenuated the effect of miR-19a and increased its expression. CONCLUSIONS: Our study demonstrated that miR-19a and CD22 comprised a feedback loop for B cell response in sepsis, providing a potential therapeutic target to recover the immune homeostasis.


Assuntos
Linfócitos B/imunologia , Retroalimentação Fisiológica , MicroRNAs/imunologia , Sepse/imunologia , Lectina 2 Semelhante a Ig de Ligação ao Ácido Siálico/imunologia , Análise de Variância , Western Blotting , China , Primers do DNA/genética , Citometria de Fluxo , Humanos , Técnicas In Vitro , Lipopolissacarídeos , Reação em Cadeia da Polimerase em Tempo Real
17.
Hepatobiliary Pancreat Dis Int ; 14(5): 523-9, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26459729

RESUMO

BACKGROUND: Soluble CD22 (sCD22) is a fragment of CD22, a B cell-specific membrane protein that negatively regulates B-cell receptor signaling. To date, sCD22 has only been regarded as a tumor marker of B-cell malignancies. Its expression in infectious diseases has not yet been assessed. METHODS: Serum concentrations of sCD22, procalcitonin (PCT) and interleukin-6 (IL-6) were measured by enzyme-linked immunosorbent assays in patients with intra-abdominal Gram-negative bacterial infection. Receiver operating characteristic curve analysis was performed to evaluate the diagnostic accuracy of these biomarkers in this type of infection. The correlations between biomarkers and the Acute Physiology and Chronic Health Evaluation (APACHE) II scores were also analyzed. RESULTS: Concentrations of sCD22 were significantly elevated in patients with sepsis and the elevation is correlated with the severity of sepsis. sCD22 was also slightly elevated in patients with non-infected systemic inflammatory response syndrome or local infection. The diagnostic accuracy of sCD22 for sepsis was equivalent to that of PCT or IL-6. In addition, the correlation of sCD22 with APACHE II scores was stronger than that of PCT or IL-6. CONCLUSIONS: Serum sCD22 is a novel inflammatory mediator released during infection. This soluble biomarker plays a potential role in the diagnosis of Gram-negative bacterial sepsis, with a diagnostic accuracy as efficient as that of PCT or IL-6. Furthermore, sCD22 is more valuable to predict the outcomes in patients with sepsis than PCT or IL-6. The present study suggested that sCD22 might be potentially useful in supplementing current criteria for sepsis.


Assuntos
Doenças Biliares/sangue , Infecções por Bactérias Gram-Negativas/diagnóstico , Sepse/diagnóstico , Lectina 2 Semelhante a Ig de Ligação ao Ácido Siálico/sangue , APACHE , Adulto , Idoso , Doenças Biliares/complicações , Biomarcadores/sangue , Calcitonina/sangue , Peptídeo Relacionado com Gene de Calcitonina , Feminino , Infecções por Bactérias Gram-Negativas/sangue , Infecções por Bactérias Gram-Negativas/complicações , Humanos , Interleucina-6/sangue , Masculino , Pessoa de Meia-Idade , Prognóstico , Precursores de Proteínas/sangue , Curva ROC , Sepse/sangue , Sepse/microbiologia , Índice de Gravidade de Doença
18.
J Huazhong Univ Sci Technolog Med Sci ; 34(1): 33-36, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24496676

RESUMO

Aortic valve calcification is a common disease in the elderly, but its cellular and molecular mechanisms are not clear. In order to verify the hypothesis that Wnt/ß-catenin signaling pathway is involved in the process of calcification of aortic valve, porcine aortic valve interstitial cells (VICs) were isolated, cultured and stimulated with oxidized low density lipoprotein (ox-LDL) for 48 h to induce the differentiation of VICs into osteoblast-like cells. The key proteins and genes of Wnt/ß-catenin signaling pathway, such as glycogen synthase kinase 3ß (GSK-3ß) and ß-catenin, were detected by using Western blotting and real-time polymerase chain reaction (PCR). The results showed that the VICs managed to differentiate into osteoblast-like cells after the stimulation with ox-LDL and the levels of proteins and genes of GSK-3ß and ß-catenin were increased significantly in VICs after stimulation for 48 h (P<0.05). It is suggested that Wnt/ß-catenin signaling pathway may play a key role in the differentiation of VICs into osteoblast-like cells and make great contribution to aortic valve calcification.


Assuntos
Estenose da Valva Aórtica , Valva Aórtica/patologia , Calcinose , Via de Sinalização Wnt/fisiologia , Fosfatase Alcalina/genética , Fosfatase Alcalina/metabolismo , Animais , Valva Aórtica/metabolismo , Western Blotting , Proteína Morfogenética Óssea 2/genética , Proteína Morfogenética Óssea 2/metabolismo , Diferenciação Celular/efeitos dos fármacos , Diferenciação Celular/genética , Células Cultivadas , Expressão Gênica/efeitos dos fármacos , Quinase 3 da Glicogênio Sintase/genética , Quinase 3 da Glicogênio Sintase/metabolismo , Lipoproteínas LDL/farmacologia , Osteoblastos/efeitos dos fármacos , Osteoblastos/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Suínos , Via de Sinalização Wnt/genética , beta Catenina/genética , beta Catenina/metabolismo
19.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 45(1): 84-8, 2014 Jan.
Artigo em Zh | MEDLINE | ID: mdl-24527589

RESUMO

OBJECTIVE: To determine the relationship between EEG changes of parietal association cortex (PtA) and drug-seeking behaviors of heroin-induced conditioned place preference (CPP) rats. METHODS: Stereotaxic electrode was buried in the PtA of rats, which were then divided randomly into heroin-induced CPP group and operation-only control group. A CPP video system in combination with EEG wireless telemetry was used for recording PtA EEG and the behaviors of the rats-staying in black or white chamber of the video box; shuttling between black-white chambers or between white-black chambers. RESULTS: No significant difference in percentage of the telemetry EEG waves was found between the two groups of rats when they stayed in the black or white chambers. The heroin-induced CPP rats had increased percentage of delta waves (P < 0.05) on the right PtA and decreased percentage of beta and beta2 waves on both right and left PtA (P < 0.05) when they shuttled between two chambers. Compared with the operation-only controls, significant decrease in the percentage of delta waves on both left and right PtA and increase in theta, alpha and alpha1 waves were evident (P < 0.05) only when the heroin-induced CPP rats shuttled between white-black chambers. CONCLUSION: EEG changes on PtA of heroin-induced CPP rats differ between staying and shuttling states. Such changes may not be associated with drug-seeking behaviors.


Assuntos
Comportamento de Procura de Droga , Eletroencefalografia , Heroína , Lobo Parietal/fisiopatologia , Animais , Condicionamento Psicológico , Relação Dose-Resposta a Droga , Ratos , Ratos Sprague-Dawley , Telemetria
20.
J Fungi (Basel) ; 10(1)2024 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-38248964

RESUMO

Three new wood-inhabiting fungal species, Cerioporus yunnanensis, Perenniporiopsis sinensis, and Sarcoporia yunnanensis, are proposed based on a combination of the morphological features and molecular evidence. Cerioporus yunnanensis is characterized by the pileate basidiomata having a fawn brown to black pileal surface, a dimitic hyphal system with clamped generative hyphae, and the presence of the fusoid cystidioles and cylindrical basidiospores (9-12.5 × 3.5-5 µm). Perenniporiopsis sinensis is distinct from the osseous pileus with verrucose, an orange-yellow to dark reddish-brown pileal surface with a cream margin, a trimitic hyphal system with clamped generative hyphae, and the presence of the fusiform cystidioles and ellipsoid basidiospores (9-11 × 5.5-6.5 µm). Sarcoporia yunnanensis is typical of the pileate basidiomata with a salmon to reddish-brown pileal surface, a monomitic hyphal system with clamped generative hyphae, and the presence of the ellipsoid basidiospores (4-5.5 × 2.5-4 µm). Sequences of ITS + nLSU + mt-SSU + TEF1 + RPB1 + RPB2 genes were used for the phylogenetic analyses using maximum likelihood, maximum parsimony, and Bayesian inference methods. The multiple genes with six loci analysis showed that the three new species nested within the order Polyporales, in which C. yunnanensis and P. sinensis nested into the family Polyporaceae, and S. yunnanensis grouped into the family Sarcoporiaceae.

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