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  1. AU="Xuedi Zhang"
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  39. AU="Artin, Hewa"
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  1. Artikel ; Online: Cis- and trans-regulation by histone H4 basic patch R17/R19 in metazoan development

    Xuedi Zhang / Xiangyu Wu / Ju Peng / Angyang Sun / Yan Guo / Pengchong Fu / Guanjun Gao

    Open Biology, Vol 12, Iss

    2022  Band 11

    Abstract: The histone H4 basic patch is critical for chromatin structure and regulation of the chromatin machinery. However, the biological roles of these positively charged residues and the mechanisms by which they regulate gene expression remain unclear. In this ...

    Abstract The histone H4 basic patch is critical for chromatin structure and regulation of the chromatin machinery. However, the biological roles of these positively charged residues and the mechanisms by which they regulate gene expression remain unclear. In this study, we used histone mutagenesis to investigate the physiological function and downstream regulatory genes of H4 residues R17 and R19 in Drosophila. We found all histone mutations including R17A/E/H and R19A/E/H (R17 and R19 of H4 are substituted by A, E and H respectively) result in a range of growth defects and abnormalities in chromosomal high-order structures, whereas R17E mutation is embryonic lethal. RNA-seq demonstrates that downregulated genes in both R17A and R19A show significant overlap and are enriched in development-related pathways. In addition, Western and cytological analyses showed that the R17A mutation resulted in a significant reduction in H4K16 acetylation and male offspring, implying that the R17 may be involved in male dosage compensation mechanisms. R19 mutation on the other hand strongly affect Gpp (Dot1 homologue in flies)-mediated H3K79 methylation, possibly through histone crosstalk. Together these results provide insights into the differential impacts of positive charges of H4 basic patch R17/R19 on regulation of gene transcription during developmental processes.
    Schlagwörter Drosophila ; development ; histone ; H4 basic patch ; Biology (General) ; QH301-705.5
    Thema/Rubrik (Code) 572
    Sprache Englisch
    Erscheinungsdatum 2022-11-01T00:00:00Z
    Verlag The Royal Society
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Broad phosphorylation mediated by testis-specific serine/threonine kinases contributes to spermiogenesis and male fertility

    Xuedi Zhang / Ju Peng / Menghua Wu / Angyang Sun / Xiangyu Wu / Jie Zheng / Wangfei Shi / Guanjun Gao

    Nature Communications, Vol 14, Iss 1, Pp 1-

    2023  Band 20

    Abstract: Abstract Genetic studies elucidate a link between testis-specific serine/threonine kinases (TSSKs) and male infertility in mammals, but the underlying mechanisms are unclear. Here, we identify a TSSK homolog in Drosophila, CG14305 (termed dTSSK), whose ... ...

    Abstract Abstract Genetic studies elucidate a link between testis-specific serine/threonine kinases (TSSKs) and male infertility in mammals, but the underlying mechanisms are unclear. Here, we identify a TSSK homolog in Drosophila, CG14305 (termed dTSSK), whose mutation impairs the histone-to-protamine transition during spermiogenesis and causes multiple phenotypic defects in nuclear shaping, DNA condensation, and flagellar organization in spermatids. Genetic analysis demonstrates that kinase catalytic activity of dTSSK, which is functionally conserved with human TSSKs, is essential for male fertility. Phosphoproteomics identify 828 phosphopeptides/449 proteins as potential substrates of dTSSK enriched primarily in microtubule-based processes, flagellar organization and mobility, and spermatid differentiation and development, suggesting that dTSSK phosphorylates various proteins to orchestrate postmeiotic spermiogenesis. Among them, the two substrates, protamine-like protein Mst77F/Ser9 and transition protein Mst33A/Ser237, are biochemically validated to be phosphorylated by dTSSK in vitro, and are genetically demonstrated to be involved in spermiogenesis in vivo. Collectively, our findings demonstrate that broad phosphorylation mediated by TSSKs plays an indispensable role in spermiogenesis.
    Schlagwörter Science ; Q
    Thema/Rubrik (Code) 571
    Sprache Englisch
    Erscheinungsdatum 2023-05-01T00:00:00Z
    Verlag Nature Portfolio
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  3. Artikel ; Online: METTL3-mediated m6A mRNA methylation regulates neutrophil activation through targeting TLR4 signaling

    Shuhua Luo / Chaoxiong Liao / Lina Zhang / Chunxiu Ling / Xuedi Zhang / Pengyun Xie / Guomei Su / Zhanghui Chen / Liangqing Zhang / Tianwen Lai / Jing Tang

    Cell Reports, Vol 43, Iss 1, Pp 113666- (2024)

    2024  

    Schlagwörter Biology (General) ; QH301-705.5
    Sprache Englisch
    Erscheinungsdatum 2024-01-01T00:00:00Z
    Verlag Elsevier
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  4. Artikel ; Online: Stem Cells from Human Exfoliated Deciduous Teeth Attenuate Trigeminal Neuralgia in Rats

    Xiaofeng Bai / Xuedi Zhang / Chun Wang / Yao Liu / Xuemei Liu / Yu Fan / Xia Zhang

    Stem Cells International, Vol

    2021  Band 2021

    Abstract: Trigeminal neuralgia is an incurable progressive nervous system disease that can last for several months or years. Stem cells from human exfoliated deciduous teeth (SHED) are a candidate source for cell-based therapy. Owing to their neuroprotective and ... ...

    Abstract Trigeminal neuralgia is an incurable progressive nervous system disease that can last for several months or years. Stem cells from human exfoliated deciduous teeth (SHED) are a candidate source for cell-based therapy. Owing to their neuroprotective and immunomodulatory effects, these neural crest cells have potential roles in mediating chronic pain. In this study, we established a rat model of chronic constriction injury of the infraorbital nerve (CCI-ION) to evaluate the analgesic effect of SHED in neuropathic pain. The effects of local SHED transplantation on inflammatory cell infiltration in the trigeminal nerve were investigated based on hematoxylin and eosin staining. The levels of proinflammatory factors in the injured nerve and transient receptor potential vanilloid type 1 (TRPV1) expression in the trigeminal nerve and ganglion were quantified. The data showed that systemic or local injection of SHED attenuated the sensitivity of rats to mechanical stimuli after nerve injury, and this effect lasted throughout the observation period of 8 weeks. PKH26-labeled SHED were distributed to the ipsilateral trigeminal ganglions 24 and 72 hours after local injection. SHED transplantation at the lesion site led to reduced inflammatory cell infiltration and proinflammatory cytokine levels in the injured nerve and inhibited CCI-ION-induced upregulation of TRPV1 expression in the trigeminal nerve and ganglion in the early phase. Therefore, these results provide preclinical evidence that supports the use of SHED in the treatment of trigeminal neuralgia and potentially other chronic pain conditions.
    Schlagwörter Internal medicine ; RC31-1245
    Thema/Rubrik (Code) 610
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Hindawi Limited
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel ; Online: CRISPR/Cas9 mediated genetic resource for unknown kinase and phosphatase genes in Drosophila

    Menghua Wu / Xuedi Zhang / Wei Wei / Li Long / Sainan An / Guanjun Gao

    Scientific Reports, Vol 10, Iss 1, Pp 1-

    2020  Band 6

    Abstract: Abstract Kinases and phosphatases are crucial for cellular processes and animal development. Various sets of resources in Drosophila have contributed significantly to the identification of kinases, phosphatases and their regulators. However, there are ... ...

    Abstract Abstract Kinases and phosphatases are crucial for cellular processes and animal development. Various sets of resources in Drosophila have contributed significantly to the identification of kinases, phosphatases and their regulators. However, there are still many kinases, phosphatases and associate genes with unknown functions in the Drosophila genome. In this study, we utilized a CRISPR/Cas9 strategy to generate stable mutants for these unknown kinases, phosphatases and associate factors in Drosophila. For all the 156 unknown gene loci, we totally obtained 385 mutant alleles of 105 candidates, with 18 failure due to low efficiency of selected gRNAs and other 33 failure due to few recovered F0, which indicated high probability of lethal genes. From all the 105 mutated genes, we observed 9 whose mutants were lethal and another 4 sterile, most of which with human orthologs referred in OMIM, representing their huge value for human disease research. Here, we deliver these mutants as an open resource for more interesting studies.
    Schlagwörter Medicine ; R ; Science ; Q
    Thema/Rubrik (Code) 572
    Sprache Englisch
    Erscheinungsdatum 2020-04-01T00:00:00Z
    Verlag Nature Publishing Group
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  6. Artikel ; Online: EGFR promotes the apoptosis of CD4+ T lymphocytes through TBK1/Glut1 induced Warburg effect in sepsis

    Li Huang / Xuedi Zhang / Junyu Fan / Xiaolei Liu / Shuhua Luo / Dianqing Cao / Youtan Liu / Zhengyuan Xia / Hanhui Zhong / Cuiping Chen / Liangqing Zhang / Zhifeng Liu / Jing Tang

    Journal of Advanced Research, Vol 44, Iss , Pp 39-

    2023  Band 51

    Abstract: Introduction: Sepsis-induced apoptosis leads to lymphopenia including the decrease of CD4+ T cells thus favoring immunosuppression. Objectives: Although epidermal growth factor receptor (EGFR) inhibitors significantly improve the survival rate of septic ... ...

    Abstract Introduction: Sepsis-induced apoptosis leads to lymphopenia including the decrease of CD4+ T cells thus favoring immunosuppression. Objectives: Although epidermal growth factor receptor (EGFR) inhibitors significantly improve the survival rate of septic mice, the effect of EGFR on the function and metabolism of CD4+ T cells in sepsis remained unknown. Methods: CD4+ T cells from septic mice and patients were assessed for apoptosis, activation, Warburg metabolism and glucose transporter 1 (Glut1) expression with or without the interference of EGFR activation. Results: EGFR facilitates CD4+ T cell activation and apoptosis through Glut1, which is a key enzyme that controls glycolysis in T cells. EGFR, TANK binding kinase 1 (TBK1) and Glut1 form a complex to facilitate Glut1 transportation from cytoplasm to cell surface. Both the levels of membrane expression of EGFR and Glut1 and the activation levels of CD4+ T cells were significantly higher in patients with sepsis as compared with healthy subjects. Conclusion: Our data demonstrated that through its downstream TBK1/Exo84/RalA protein system, EGFR regulates Glut1 transporting to the cell surface, which is a key step for inducing the Warburg effect and the subsequent cellular activation and apoptosis of CD4+ T lymphocytes and may eventually affect the immune functional status, causing immune cell exhaustion in sepsis.
    Schlagwörter Sepsis ; EGFR ; CD4+ T lymphocytes ; Activation ; Apoptosis ; Glycolysis ; Medicine (General) ; R5-920 ; Science (General) ; Q1-390
    Thema/Rubrik (Code) 570
    Sprache Englisch
    Erscheinungsdatum 2023-02-01T00:00:00Z
    Verlag Elsevier
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  7. Artikel ; Online: Knowledge of and Compliance with Surviving Sepsis Campaign Guidelines among Anesthesiologists

    Hui Li / Xiangyang Yu / Rui Zhou / Ya Wang / Xuedi Zhang / Shengwen Song / Qinghua Chen / Baoli Cheng / Xiangming Fang

    Journal of Healthcare Engineering, Vol

    A Nationwide Survey in China

    2021  Band 2021

    Abstract: We aimed to describe anesthesiologists’ knowledge of and compliance with the Surviving Sepsis Campaign (SSC) guidelines in the perioperative management of patients with sepsis in China. We designed a questionnaire-based, cross-sectional survey. We sent ... ...

    Abstract We aimed to describe anesthesiologists’ knowledge of and compliance with the Surviving Sepsis Campaign (SSC) guidelines in the perioperative management of patients with sepsis in China. We designed a questionnaire-based, cross-sectional survey. We sent out online questionnaires during 2019 to evaluate whether anesthesiologists in China were familiar with and applied SSC guidelines in perioperative management. We also compared anesthesiologists’ knowledge of and compliance with the guidelines among different levels of hospital. In this study, we obtained 971 responses from anesthesiology departments across China. The survey responses showed that 39.0% of anesthesiologists rated their knowledge of the SSC guidelines as being “very familiar” or at least “somewhat familiar.” In total, 68.9% of respondents chose “Initial fluid resuscitation followed by frequent hemodynamic reassessment” as their therapy strategy for patients with septic shock; 62.0% of anesthesiologists chose lactate as a marker of initial resuscitation in clinical practice, and 39.1% thought bundle therapy needed to be started within 1 hour of sepsis diagnosis. A total of 37.1% and 27.1% of respondents chose hydroxyethyl starches and gelatins, respectively, as the preferred fluids for septic shock. As the first choice of vasopressors in patients with sepsis, 727 (74.9%) anesthesiologists chose the correct answer (norepinephrine). Anesthesiologists from tertiary hospitals (class A) had greater familiarity and compliance with the SSC guidelines than those from other hospitals (P<0.001). In summary, anesthesiologists in China have some knowledge of the SSC guidelines and tend to practice in keeping with these guidelines. However, for some items, anesthesiologists are not up to date with the latest version of the SSC guidelines. The popularity of these guidelines is not homogenous among different levels of hospital. Anesthesiologists must strengthen their knowledge of the SSC guidelines and update their practice in a regular and timely manner, ...
    Schlagwörter Medicine (General) ; R5-920 ; Medical technology ; R855-855.5
    Thema/Rubrik (Code) 950
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Hindawi Limited
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Artikel ; Online: Macrophage-derived exosomal aminopeptidase N aggravates sepsis-induced acute lung injury by regulating necroptosis of lung epithelial cell

    Ting Gong / Xuedi Zhang / Zhiyong Peng / Yinfeng Ye / Ruimeng Liu / Yinggui Yang / Zhugui Chen / Zhihao Zhang / Hongfei Hu / Shuang Yin / Yi Xu / Jing Tang / Youtan Liu

    Communications Biology, Vol 5, Iss 1, Pp 1-

    2022  Band 17

    Abstract: Necroptosis of lung epithelial cells is regulated by aminopeptidase N levels in circulating plasma exosomes in patients and mice with sepsis-induced acute lung injury. ...

    Abstract Necroptosis of lung epithelial cells is regulated by aminopeptidase N levels in circulating plasma exosomes in patients and mice with sepsis-induced acute lung injury.
    Schlagwörter Biology (General) ; QH301-705.5
    Sprache Englisch
    Erscheinungsdatum 2022-06-01T00:00:00Z
    Verlag Nature Portfolio
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  9. Artikel ; Online: Chemical Characteristics and Quality Assessment of Groundwater of Exploited Aquifers in Beijiao Water Source of Yinchuan, China

    Hao Wu / Jie Chen / Hui Qian / Xuedi Zhang

    Journal of Chemistry, Vol

    A Case Study for Drinking, Irrigation, and Industrial Purposes

    2015  Band 2015

    Abstract: This work is aimed at reviewing the chemical characteristics and evaluation of the quality of exploited groundwater in Beijiao water source of Yinchuan. A coupled model based on osculating value method (OVM) and entropy is proposed to determine the ... ...

    Abstract This work is aimed at reviewing the chemical characteristics and evaluation of the quality of exploited groundwater in Beijiao water source of Yinchuan. A coupled model based on osculating value method (OVM) and entropy is proposed to determine the suitability for drinking. Besides, phreatic water and confined water are evaluated for irrigation purposes and industrial purposes, respectively. Piper diagram shows different hydrochemical characteristics between aquifers, which can be explained by the control mechanisms revealed by Gibbs diagram. Chloroalkaline indices and ions relationship indicate that reverse ion exchanges occur in different aquifers. Based on the osculating values, 96% of the phreatic water samples are fit for human consumption, and the confined water can provide quality drinking water. Most of the phreatic water samples have no sodium hazard but have magnesium hazard. All the confined water samples generate mild foaming reaction, and 93% of them are mildly corrosive for boilers. An assessment by OVM without entropy is calculated. Similar results to the coupled model demonstrate that pure OVM is also objective and valid. The simple algorithm turns multicriteria decision-making problems into an integrated index which is just as useful to water quality assessment.
    Schlagwörter Chemistry ; QD1-999
    Sprache Englisch
    Erscheinungsdatum 2015-01-01T00:00:00Z
    Verlag Hindawi Limited
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  10. Artikel ; Online: Multivariate Analysis of Confined Groundwater Hydrochemistry of a Long-Exploited Sedimentary Basin in Northwest China

    Xuedi Zhang / Hui Qian / Hao Wu / Jie Chen / Liang Qiao

    Journal of Chemistry, Vol

    2016  Band 2016

    Abstract: A series of environmental and geological problems have been caused by overexploitation of confined aquifers (i.e., deep groundwater) in the Yinchuan region, northwest China. Accordingly, the characteristics of confined water were analyzed and collected ... ...

    Abstract A series of environmental and geological problems have been caused by overexploitation of confined aquifers (i.e., deep groundwater) in the Yinchuan region, northwest China. Accordingly, the characteristics of confined water were analyzed and collected from 33 sampling wells in spring of 2011, to determine the factors that influenced the composition and evolution of confined water, using principal component analysis (PCA), correlation analysis, groundwater evolution, and mineral dissolution/precipitation analysis. PCA showed that the hydrochemistry of confined water is controlled mainly by the dissolution of minerals, mixing between the confined aquifer and polluted phreatic water, and effects of ion exchange in the study area. The following management actions recommended were essential, in order to enable the sustainable exploitation of confined water: (1) gradually decreasing the amount of groundwater pumped from confined aquifer in the central part of the depression cone, (2) upgrading the quality of phreatic water, and (3) increasing artificial recharge of the groundwater system by flood waters in the Helan leaning pluvial plain.
    Schlagwörter Chemistry ; QD1-999
    Thema/Rubrik (Code) 550
    Sprache Englisch
    Erscheinungsdatum 2016-01-01T00:00:00Z
    Verlag Hindawi Limited
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