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  1. Article: Regulation of IFNβ expression: focusing on the role of its promoter and transcription regulators.

    Fan, Jiqiang / Li, Qiumei / Liang, Jiadi / Chen, Zhirong / Chen, Linqin / Lai, Junzhong / Chen, Qi

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1158777

    Abstract: IFNβ is a single-copy gene without an intron. Under normal circumstances, it shows low or no expression in cells. It is upregulated only when the body needs it or is stimulated. Stimuli bind to the pattern recognition receptors (PRRs) and pass via ... ...

    Abstract IFNβ is a single-copy gene without an intron. Under normal circumstances, it shows low or no expression in cells. It is upregulated only when the body needs it or is stimulated. Stimuli bind to the pattern recognition receptors (PRRs) and pass via various signaling pathways to several basic transcriptional regulators, such as IRFs, NF-кB, and AP-1. Subsequently, the transcriptional regulators enter the nucleus and bind to regulatory elements of the IFNβ promoter. After various modifications, the position of the nucleosome is altered and the complex is assembled to activate the IFNβ expression. However, IFNβ regulation involves a complex network. For the study of immunity and diseases, it is important to understand how transcription factors bind to regulatory elements through specific forms, which elements in cells are involved in regulation, what regulation occurs during the assembly of enhancers and transcription complexes, and the possible regulatory mechanisms after transcription. Thus, this review focuses on the various regulatory mechanisms and elements involved in the activation of IFNβ expression. In addition, we discuss the impact of this regulation in biology.
    Language English
    Publishing date 2023-06-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1158777
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Associations between individual and structural level racism and gestational age at birth in the Nulliparous Pregnancy Outcomes Study: Monitoring mothers-to-be.

    Barcelona, Veronica / Chen, LinQin / Zhao, Yihong / Samari, Goleen / Monk, Catherine / McNeil, Rebecca / Baccarelli, Andrea A / Wapner, Ronald

    Research square

    2024  

    Abstract: The purpose of this study was to investigate the associations between multilevel racism and gestational age at birth among nulliparous non-Hispanic Black, non-Hispanic White and Hispanic women. We conducted a secondary analysis of data of the nuMoM2b ... ...

    Abstract The purpose of this study was to investigate the associations between multilevel racism and gestational age at birth among nulliparous non-Hispanic Black, non-Hispanic White and Hispanic women. We conducted a secondary analysis of data of the nuMoM2b Study (2010-2013) to examine the associations between individual and structural-level experiences of racism and discrimination and gestational age at birth among nulliparous women (n=7,732) at eight sites across the U.S. Measures included the individual Experiences of Discrimination (EOD) scale and the Index of Concentration (ICE) at the Extremes to measure structural racism. After adjustment,we observed a significant individual and structural racism interaction on gestational length (p=0.03). In subgroup analyses, we found that among these with high EOD scores, women who were from households concentrated in the more privileged group had significantly longer gestations (β = 1.07, 95% CI: 0.24, 1.90). Women who reported higher EOD scores and more economic privilege had longer gestations, demonstrating the moderating effect of ICE as a measure of structural racism. In conclusion, ICE may represent a modifiable factor in the prevention of adverse birth outcomes in nulliparas.
    Language English
    Publishing date 2024-01-30
    Publishing country United States
    Document type Preprint
    DOI 10.21203/rs.3.rs-3898223/v1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Carrimycin ameliorates lipopolysaccharide and cecal ligation and puncture-induced sepsis in mice.

    Lai, Junzhong / Liang, Jiadi / Chen, Kunsen / Guan, Biyun / Chen, Zhirong / Chen, Linqin / Fan, Jiqiang / Zhang, Yong / Li, Qiumei / Su, Jingqian / Chen, Qi / Lin, Jizhen

    Chinese journal of natural medicines

    2024  Volume 22, Issue 3, Page(s) 235–248

    Abstract: Carrimycin (CA), sanctioned by China's National Medical Products Administration (NMPA) in 2019 for treating acute bronchitis and sinusitis, has recently been observed to exhibit multifaceted biological activities, encompassing anti-inflammatory, ... ...

    Abstract Carrimycin (CA), sanctioned by China's National Medical Products Administration (NMPA) in 2019 for treating acute bronchitis and sinusitis, has recently been observed to exhibit multifaceted biological activities, encompassing anti-inflammatory, antiviral, and anti-tumor properties. Despite these applications, its efficacy in sepsis treatment remains unexplored. This study introduces a novel function of CA, demonstrating its capacity to mitigate sepsis induced by lipopolysaccharide (LPS) and cecal ligation and puncture (CLP) in mice models. Our research employed in vitro assays, real-time quantitative polymerase chain reaction (RT-qPCR), and RNA-seq analysis to establish that CA significantly reduces the levels of pro-inflammatory cytokines, namely tumor necrosis factor-alpha (TNF-α), interleukin 1 beta (IL-1β), and interleukin 6 (IL-6), in response to LPS stimulation. Additionally, Western blotting and immunofluorescence assays revealed that CA impedes Nuclear Factor Kappa B (NF-κB) activation in LPS-stimulated RAW264.7 cells. Complementing these findings, in vivo experiments demonstrated that CA effectively alleviates LPS- and CLP-triggered organ inflammation in C57BL/6 mice. Further insights were gained through 16S sequencing, highlighting CA's pivotal role in enhancing gut microbiota diversity and modulating metabolic pathways, particularly by augmenting the production of short-chain fatty acids in mice subjected to CLP. Notably, a comparative analysis revealed that CA's anti-inflammatory efficacy surpasses that of equivalent doses of aspirin (ASP) and TIENAM. Collectively, these findings suggest that CA exhibits significant therapeutic potential in sepsis treatment. This discovery provides a foundational theoretical basis for the clinical application of CA in sepsis management.
    MeSH term(s) Mice ; Animals ; Lipopolysaccharides/adverse effects ; Mice, Inbred C57BL ; Tumor Necrosis Factor-alpha/metabolism ; Interleukin-6 ; Punctures ; Sepsis/metabolism ; Anti-Inflammatory Agents/pharmacology ; Anti-Inflammatory Agents/therapeutic use ; Disease Models, Animal ; Spiramycin/analogs & derivatives
    Chemical Substances Lipopolysaccharides ; carrimycin (K5E0V85NB9) ; Tumor Necrosis Factor-alpha ; Interleukin-6 ; Anti-Inflammatory Agents ; Spiramycin (8025-81-8)
    Language English
    Publishing date 2024-02-07
    Publishing country China
    Document type Journal Article
    ZDB-ID 2192577-X
    ISSN 1875-5364 ; 2095-6975 ; 1672-3651
    ISSN (online) 1875-5364
    ISSN 2095-6975 ; 1672-3651
    DOI 10.1016/S1875-5364(24)60600-X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  4. Article ; Online: A drug-delivery depot for epigenetic modulation and enhanced cancer immunotherapy.

    Lai, Junzhong / Liang, Jiadi / Zhang, Yong / Zhang, Bingchen / Wei, Jianhui / Fan, Jiqiang / Chen, Linqin / Chen, Zhirong / Li, Qiumei / Guo, Dong / Lin, Jizhen / Chen, Qi

    Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie

    2023  Volume 168, Page(s) 115687

    Abstract: DNA methyltransferase inhibitors (DNMTis) have found widespread application in the management of cancer. Zebularine (Zeb), functioning as a demethylating agent, has exhibited notable advantages and enhanced therapeutic efficacy in the realm of tumour ... ...

    Abstract DNA methyltransferase inhibitors (DNMTis) have found widespread application in the management of cancer. Zebularine (Zeb), functioning as a demethylating agent, has exhibited notable advantages and enhanced therapeutic efficacy in the realm of tumour immunotherapy. Nevertheless, due to its lack of targeted functionality, standalone Zeb therapy necessitates the administration of a substantially higher dosage. In this investigation, we have devised an innovative nanodrug formulation, comprising the DNA methyltransferase inhibitor Zeb and pH-responsive chitosan (CS), hereinafter referred to as CS-Zeb nanoparticles (NPs). Our findings have unveiled that CS-Zeb NPs manifest heightened drug release within an acidic milieu (pH 5.5) in comparison to a neutral environment (pH 7.4). Furthermore, in vivo studies have conclusively affirmed that, in contrast to equivalent quantities of Zeb in isolation, the nanocomplex significantly curtailed tumour burden and protracted the survival duration of the B16F10 tumour-bearing murine model. Additionally, CS-Zeb NPs elicited an augmentation of CD8+ T cells within the peripheral circulation of mice and tumour-infiltrating lymphocytes (TILs). Notably, the dosage of CS-Zeb NPs was reduced by a remarkable 70-fold when juxtaposed with Zeb administered in isolation. To summarise, our study underscores the potential of CS-Zeb NPs as an alternative chemotherapeutic agent for cancer treatment.
    MeSH term(s) Animals ; Mice ; Epigenesis, Genetic ; Neoplasms/drug therapy ; Neoplasms/genetics ; Immunotherapy ; DNA ; Methyltransferases ; Nanoparticles ; Chitosan ; Drug Carriers
    Chemical Substances DNA (9007-49-2) ; Methyltransferases (EC 2.1.1.-) ; Chitosan (9012-76-4) ; Drug Carriers
    Language English
    Publishing date 2023-10-12
    Publishing country France
    Document type Journal Article
    ZDB-ID 392415-4
    ISSN 1950-6007 ; 0753-3322 ; 0300-0893
    ISSN (online) 1950-6007
    ISSN 0753-3322 ; 0300-0893
    DOI 10.1016/j.biopha.2023.115687
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Ud II Zs.198: Show issues Location:
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