transcriptomic regulation

  • 文章类型: Journal Article
    组学技术,包括基因组学,转录组学,蛋白质组学,和代谢组学已经平滑了研究人员产生假设和发现各种农学相关功能和机制的能力,以及它们的含义和联系。随着对多种除草剂作用模式具有抗性的病例数显著增加,除草剂抗性的研究目前是杂草科学领域的主要研究领域之一。高通量技术已经开始彻底改变当前的分子杂草生物学研究。杂草中除草剂抗性的进化(特别是通过非目标位点抗性机制)是复杂的一个完美例子,多途径整合诱导的反应。迄今为止,功能基因组学,包括转录组学和代谢组学研究已分别用于除草剂抗性研究,然而,缺乏综合方法。因此,尽管组学技术能够提供对杂草分子功能的重要见解,使用单一组学有时可能会产生误导。这篇小型综述旨在讨论基于转录组和代谢组的方法在除草剂抗性研究中的当前进展,以及它们的系统整合。
    Omics techniques, including genomics, transcriptomics, proteomics, and metabolomics have smoothed the researcher\'s ability to generate hypotheses and discover various agronomically relevant functions and mechanisms, as well as their implications and associations. With a significant increase in the number of cases with resistance to multiple herbicide modes of action, studies on herbicide resistance are currently one of the predominant areas of research within the field of weed science. High-throughput technologies have already started revolutionizing the current molecular weed biology studies. The evolution of herbicide resistance in weeds (particularly via non-target site resistance mechanism) is a perfect example of a complex, multi-pathway integration-induced response. To date, functional genomics, including transcriptomic and metabolomic studies have been used separately in herbicide resistance research, however there is a substantial lack of integrated approach. Hence, despite the ability of omics technologies to provide significant insights into the molecular functioning of weeds, using a single omics can sometimes be misleading. This mini-review will aim to discuss the current progress of transcriptome-based and metabolome-based approaches in herbicide resistance research, along with their systematic integration.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:成人听力问题(HP)很常见,并且与多种合并症相关。它的患病率随着年龄的增长而增加,反映环境因素和遗传倾向的累积效应。尽管已经确定了几个风险位点,大规模的遗传研究仍未充分研究HP生物学和流行病学。
    方法:利用英国生物银行,护士健康研究(I和II),卫生专业人员后续研究,和百万退伍军人计划,我们在748,668名成年参与者中对HP进行了全面的全基因组调查(发现N=501,825;复制N=226,043;跨祖先复制N=20,800).我们利用GWAS的发现来描述HP多基因结构,探索性别差异,跨祖先的多基因风险,组织特异性转录组调控,与遗传相关性状的因果关系,以及基因与HP环境危险因素的相互作用。
    结果:我们确定了54个风险位点,并证明HP多基因风险在祖先群体中是共有的。我们的转录组调控分析强调了中枢神经系统在HP发病机制中的潜在作用。性别分层分析显示,与外周激素调节组织有关的其他几个关联反映了雌激素在听力功能中的潜在作用。这一证据得到了多变量相互作用分析的支持,该分析显示了参与大脑发育的基因如何与性别相互作用,噪音污染,和吸烟与他们的HP关联。此外,遗传信息因果推断分析显示,HP与许多身心健康结局相关.
    结论:这些结果为成人HP的生物学和流行病学提供了许多新的见解。我们的性别特异性分析和转录组关联强调了可能针对药物开发或再利用的分子途径。此外,所发现的潜在因果关系可能支持新的预防性筛查计划,以确定有风险的个体.
    Hearing problems (HP) in adults are common and are associated with several comorbid conditions. Its prevalence increases with age, reflecting the cumulative effect of environmental factors and genetic predisposition. Although several risk loci have been already identified, HP biology and epidemiology are still insufficiently investigated by large-scale genetic studies.
    Leveraging the UK Biobank, the Nurses\' Health Studies (I and II), the Health Professionals Follow-up Study, and the Million Veteran Program, we conducted a comprehensive genome-wide investigation of HP in 748,668 adult participants (discovery N = 501,825; replication N = 226,043; cross-ancestry replication N = 20,800). We leveraged the GWAS findings to characterize HP polygenic architecture, exploring sex differences, polygenic risk across ancestries, tissue-specific transcriptomic regulation, cause-effect relationships with genetically correlated traits, and gene interactions with HP environmental risk factors.
    We identified 54 risk loci and demonstrated that HP polygenic risk is shared across ancestry groups. Our transcriptomic regulation analysis highlighted the potential role of the central nervous system in HP pathogenesis. The sex-stratified analyses showed several additional associations related to peripheral hormonally regulated tissues reflecting a potential role of estrogen in hearing function. This evidence was supported by the multivariate interaction analysis that showed how genes involved in brain development interact with sex, noise pollution, and tobacco smoking in relation to their HP associations. Additionally, the genetically informed causal inference analysis showed that HP is linked to many physical and mental health outcomes.
    The results provide many novel insights into the biology and epidemiology of HP in adults. Our sex-specific analyses and transcriptomic associations highlighted molecular pathways that may be targeted for drug development or repurposing. Additionally, the potential causal relationships identified may support novel preventive screening programs to identify individuals at risk.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    噬菌体被认为在感染期间表现出对宿主基因的控制。作为噬菌体和细菌共表达的动力学和大小的初步研究,我们通过使用RNA测序比较了溶藻弧菌E110菌株及其裂解噬菌体HH109的全局转录谱。总的来说,24.7%(1,143/4,620)的宿主蛋白编码基因是感染期间差异表达的基因。宿主DEGs的功能分析表明,与感染后60分钟和120分钟(mpi)相比,噬菌体HH109诱导了快速而独特的变化。基于基因共表达网络分析,预测由噬菌体HH109编码的未表征的晚期基因gp27可以调节宿主的膜转运和/或转录调节。此外,几种细菌毒力基因表达下调,而耐药基因表达上调。这项工作有助于深入了解裂解性噬菌体HH109及其致病性弧菌宿主E110的相互作用,并可以为在具有经济意义的水生动物中针对致病性弧菌感染的噬菌体疗法的研究和开发提供新的见解。重要性溶藻弧菌是一种常见的机会病原体,可导致养殖海洋动物大量死亡。噬菌体HH109高效裂解致病性溶藻弧菌菌株E110,因此可作为了解噬菌体及其宿主动态相互作用的有用模型。HH109感染后E110菌株的全局转录组反应通过使用RNA测序来表征,阐明HH109的逐步控制,一种抗噬菌体样反应,以及耐药性的升高表达。本研究提供了详细的分子描述噬菌体和溶藻弧菌,为更好地预防和控制水生动物的弧菌病提供见解。
    Phage are thought to exhibit control over host genes during infection. As a preliminary investigation of the kinetics and magnitude of co-expression between phage and bacteria, we compared the global transcriptional profiles for Vibrio alginolyticus strain E110 and its lytic phage HH109 by using RNA sequencing. In total, 24.7% (1,143/4,620) of the host protein-coding genes were differentially expressed genes during infection (DEGs). Functional analysis of the host DEGs suggests that phage HH109 induced rapid and distinctive changes when compared with 60- and 120-min postinfection (mpi). Based on gene co-expression network analysis, an uncharacterized late gene gp27 encoded by the phage HH109 was predicted to modulate the host\'s membrane transport and/or transcriptional regulation. Furthermore, expression of several bacterial virulence genes was downregulated while drug resistance genes were upregulated. This work contributes to an in-depth understanding of the reciprocal interactions of lytic phage HH109 and its pathogenic Vibrio host E110, and can provide new insights into the research and development of phage therapy against pathogenic Vibrio infections in the economically significant aquatic animals. IMPORTANCE Vibrio alginolyticus is a common opportunistic pathogen that causes mass mortality in cultured marine animals. Phage HH109 lyses pathogenic V. alginolyticus strain E110 with high efficiency and thus serves as a useful model to understand the dynamic interplay of a phage and its host. Global transcriptomic responses of strain E110 post-HH109 infection were characterized by using RNA sequencing, elucidating step-by-step control by HH109, an antiphage-like responses, and the elevated expression of drug resistance. This study provides a detailed molecular description phage and V. alginolyticus, providing insight into better prevention and control of vibriosis in aquatic animals.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:揭示转录组调节对行为差异的影响是生物学的基本目标,但是基因调控网络与个体行为差异之间的关系仍然未知。蜜蜂被认为是研究基因表达变化和行为差异的潜在机制的良好模型,因为它们在个体之间的任务中表现出强烈而明显的差异。顺式调节区通常包含影响蜜蜂行为的多种转录因子(TF)的结合位点。因此,识别不同行为状态下大脑中的顺式调节元件对于理解基因组和转录组变化如何影响蜜蜂的不同任务很重要。
    方法:在本研究中,我们采用转录组和全基因组染色质可及性分析来分析不同行为状态下蜜蜂的脑组织,以检查个体行为差异与脑基因表达变化之间的关系。我们还使用获得的开放染色质区域来鉴定与差异表达的TFs和基因相关的顺式基序,以揭示与不同任务相关的转录调控机制。
    结果:我们确定了调节包含关键TFs(CTCF,Trl和schlank)与富含属于相应TF家族的DNA序列基序的开放染色质区域相关。最突出的转录组变化,与它们的近端启动子区域内的染色质可及性修饰相关,发生在神经系统发育中,并与行为切换相关联。
    结论:我们的结果揭示了蜜蜂三个行为阶段之间的调节景观,并确定了调节不同任务的相互作用分子网络。这些结果为蜜蜂的行为差异提供了全面的见解,为今后的研究提供参考。
    Revealing the effect of transcriptomic regulation on behavioral differences is a fundamental goal in biology, but the relationship between gene regulatory networks and individual behavior differences remains largely unknown. Honey bees are considered as good models for studying the mechanisms underlying gene expression changes and behavioral differences since they exhibit strong and obvious differences in tasks between individuals. The cis-regulatory regions usually contain the binding sites of diverse transcription factor (TFs) influencing bee behavior. Thus, the identification of cis-regulatory elements in the brains across different behavioral states is important for understanding how genomic and transcriptomic variations affect different tasks in honeybees.
    In this study, we employed transcriptome and genome-wide chromatin accessibility assays to analyze brain tissues of honey bees in different behavioral states for examining the relationship between individual behavior differences and brain gene expression changes. We also used the obtained open chromatin regions to identify cis-motifs associating differentially expressed TFs and genes in order to reveal the transcriptional regulatory mechanism related to the different tasks.
    We identified genetic regulatory modules regulating different tasks that contained key TFs (CTCF, Trl and schlank) associated with open chromatin regions enriched for DNA sequence motifs belonging to the family of the corresponding TFs. The most prominent transcriptomic changes, which correlated with chromatin accessibility modifications within their proximal promoter regions, occurred in nervous system development, and were associated with behavior switch.
    Our results revealed the regulatory landscape among three behavioral stages in honeybees and identified interactive molecular networks regulating different tasks. These results provide a comprehensive insight into behavioral differences of honeybees, which offers reference for future study.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

公众号