Gene networks

基因网络
  • 文章类型: Journal Article
    先天性寨卡综合症(CZS)包括一组临床表现,可由感染寨卡病毒(ZIKV)的母亲所生的新生儿呈现。CZS相关表型包括神经学,骨骼,全身性改变和长期发育后遗症。最常报道的临床病症之一是以头围减少和认知并发症为特征的小头畸形。然而,CZS表型的不同信号通路之间的关联尚待阐明.为了揭示CZS,我们广泛回顾了ZIKV感染引起的形态学异常,以及从已发表的文献中获得的感兴趣的基因和蛋白质。有了这个基因或蛋白质列表,我们进行了计算分析来探索细胞过程,分子机制,以及与ZIKV感染相关的分子途径。因此,在这次审查中,我们全面描述了先天性ZIKV感染引起的形态学异常,通过上述分析,提出ZIKV改变的共同分子途径,可以解释中枢神经系统和颅面骨骼改变。
    Congenital Zika syndrome (CZS) comprises a set of clinical manifestations that can be presented by neonates born to mothers infected by the Zika virus (ZIKV). CZS-associated phenotypes include neurological, skeletal, and systemic alterations and long-term developmental sequelae. One of the most frequently reported clinical conditions is microcephaly characterized by a reduction in head circumference and cognitive complications. Nevertheless, the associations among the diverse signaling pathways underlying CZS phenotypes remain to be elucidated. To shed light on CZS, we have extensively reviewed the morphological anomalies resulting from ZIKV infection, as well as genes and proteins of interest obtained from the published literature. With this list of genes or proteins, we performed computational analyses to explore the cellular processes, molecular mechanisms, and molecular pathways related to ZIKV infection. Therefore, in this review, we comprehensively describe the morphological abnormalities caused by congenital ZIKV infection and, through the analysis noted above, propose common molecular pathways altered by ZIKV that could explain both central nervous system and craniofacial skeletal alterations.
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  • 文章类型: Journal Article
    我们的研究利用全基因组关联研究(GWAS)将核苷酸变异与毛果杨的性状联系起来,具有快速连锁不平衡衰变的物种。目的是克服在没有足够生物学背景的情况下解释个体基因座的统计关联的挑战。这通常导致完全依赖无关模型生物的基因注释。我们采用了一种综合方法,包括使用三种单独的木质纤维素表型鉴定技术靶向多种性状的GWAS,表达数量性状基因座(eQTL)分析,以构建围绕每个候选基因座的转录调控网络和共表达分析,为这些网络提供生物学背景,以毛果杨木质纤维素生物合成为例。该研究确定了三个可能参与木质纤维素形成的候选基因,包括一个先前识别的基因(Potri.005G116800/VND1,次生细胞壁形成的关键调节因子)和两个基因(Potri.012G130000/AtSAP9和Potri.004G202900/BIC1),在木质纤维素生物合成中具有新发现的推定作用。我们的综合方法提供了一个框架,为与性状变异相关的基因座提供生物学背景,促进新基因和调控网络的发现。
    Our study utilized genome-wide association studies (GWAS) to link nucleotide variants to traits in Populus trichocarpa, a species with rapid linkage disequilibrium decay. The aim was to overcome the challenge of interpreting statistical associations at individual loci without sufficient biological context, which often leads to reliance solely on gene annotations from unrelated model organisms. We employed an integrative approach that included GWAS targeting multiple traits using three individual techniques for lignocellulose phenotyping, expression quantitative trait loci (eQTL) analysis to construct transcriptional regulatory networks around each candidate locus and co-expression analysis to provide biological context for these networks, using lignocellulose biosynthesis in Populus trichocarpa as a case study. The research identified three candidate genes potentially involved in lignocellulose formation, including one previously recognized gene (Potri.005G116800/VND1, a critical regulator of secondary cell wall formation) and two genes (Potri.012G130000/AtSAP9 and Potri.004G202900/BIC1) with newly identified putative roles in lignocellulose biosynthesis. Our integrative approach offers a framework for providing biological context to loci associated with trait variation, facilitating the discovery of new genes and regulatory networks.
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  • 文章类型: Journal Article
    目前许多基因工程治疗方法的一个显著限制是它们对强度的控制有限。定时,或其治疗效果的细胞背景。合成基因/遗传回路是合成生物学方法,可以控制生成,改造,或特定DNA的缺失,RNA,或蛋白质,并提供对基因表达和细胞行为的精确控制。它们可以被设计为通过仔细选择启动子来执行逻辑运算,压制者,和其他遗传成分。专利检索在Espacenet,产生了38项精选专利,其中15项最常见的国际分类。专利实施方案被分类为用于递送治疗分子的应用,治疗传染病,治疗癌症,治疗出血,和治疗代谢紊乱。描述了所选遗传电路的逻辑门,以全面展示其治疗应用。合成基因电路可以定制治疗干预的精确控制,导致个性化的治疗,专门响应个人患者的需求,提高治疗效果和减少副作用。它们可以是高度灵敏的生物传感器,其通过准确监测各种生物标志物或病原体并适当地合成治疗分子来提供实时治疗。合成基因回路也可能导致先进的再生疗法的发展和可根据需要产生生物活性分子的可植入生物装置。然而,这项技术面临商业盈利能力的挑战。基因电路设计需要针对特定应用进行调整,可能有缺点,比如来自多个监管机构的毒性,同源重组,上下文依赖,资源过度使用,和环境变化。
    A significant limitation of numerous current genetic engineering therapy approaches is their limited control over the strength, timing, or cellular context of their therapeutic effect. Synthetic gene/genetic circuits are synthetic biology approaches that can control the generation, transformation, or depletion of a specific DNA, RNA, or protein and provide precise control over gene expression and cellular behavior. They can be designed to perform logical operations by carefully selecting promoters, repressors, and other genetic components. Patent search was performed in Espacenet, resulting in 38 selected patents with 15 most frequent international classifications. Patent embodiments were categorized into applications for the delivery of therapeutic molecules, treatment of infectious diseases, treatment of cancer, treatment of bleeding, and treatment of metabolic disorders. The logic gates of selected genetic circuits are described to comprehensively demonstrate their therapeutic applications. Synthetic gene circuits can be customized for precise control of therapeutic interventions, leading to personalized therapies that respond specifically to individual patient needs, enhancing treatment efficacy and minimizing side effects. They can be highly sensitive biosensors that provide real-time therapy by accurate monitoring various biomarkers or pathogens and appropriately synthesizing a therapeutic molecule. Synthetic gene circuits may also lead to the development of advanced regenerative therapies and to implantable biodevices that produce on-demand bioactive molecules. However, this technology faces challenges for commercial profitability. The genetic circuit designs need adjustments for specific applications, and may have disadvantages like toxicity from multiple regulators, homologous recombination, context dependency, resource overuse, and environmental variability.
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  • 文章类型: Journal Article
    植物角质层是一种复杂的细胞外脂质屏障,具有多种保护功能。我们通过整合从四种基因型的六种不同玉米幼苗器官收集的代谢组学和转录组学数据来研究表皮沉积,近交系B73和Mo17及其互惠杂种。这些数据集捕获了幼苗从异养形态生长到自养形态生长的发育过渡,这是一个非常容易受到环境压力的过渡。对这些数据的统计询问表明,表皮组成的主要决定因素是幼苗器官类型,而幼苗基因型对该表型的影响较小。通过综合统计分析评估的基因与代谢物的关联确定了与角质层不同元素沉积相关的三个基因网络:a)角质层蜡;b)脂肪化细胞壁生物聚合物的单体,包括角质和针膜素;和c)这两种元素。这些基因网络揭示了三个似乎支持角质层沉积的代谢程序,包括叶绿体生物发生的过程,脂质代谢,和分子调控(例如,转录因子,翻译后调节剂和植物激素)。这项研究证明了可以确定角质层沉积的更广泛的生理代谢背景,并为调节这种保护屏障特性的新靶标奠定了基础。
    The plant cuticle is a complex extracellular lipid barrier that has multiple protective functions. We investigated cuticle deposition by integrating metabolomics and transcriptomics data gathered from six different maize seedling organs of four genotypes, the inbred lines B73 and Mo17, and their reciprocal hybrids. These datasets captured the developmental transition of the seedling from heterotrophic skotomorphogenic growth to autotrophic photomorphogenic growth, which is a transition that is highly vulnerable to environmental stresses. Statistical interrogation of these data reveals that the predominant determinant of cuticle composition is seedling organ type, whereas the seedling genotype has a smaller effect on this phenotype. Gene-to-metabolite associations assessed by integrated statistical analyses identified three gene networks connected with the deposition of different elements of the cuticle: a) cuticular waxes; b) monomers of lipidized cell wall biopolymers, including cutin and suberin; and c) both of these elements. These gene networks reveal three metabolic programs that appear to support cuticle deposition, including processes of chloroplast biogenesis, lipid metabolism, and molecular regulation (e.g., transcription factors, post-translational regulators and phytohormones). This study demonstrates the wider physiological metabolic context that can determine cuticle deposition and lays the groundwork for new targets for modulating properties of this protective barrier.
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  • 文章类型: Journal Article
    背景:癌症的遗传背景仍然复杂且难以整合。已知基因内的许多体细胞突变会导致和驱动癌症,虽然癌症的全基因组关联研究(GWAS)揭示了许多与癌症相关的种系危险因素。然而,已知的体细胞驱动基因和GWAS基因座的位置候选基因之间的重叠非常小.我们假设来自多个独立癌症GWAS基因座的基因应该显示出组织特异性共调模式,这些模式收敛于癌症特异性驱动基因。
    结果:我们研究了最近的乳腺动力GWAS,前列腺,通过估计基因之间的共表达,并随后优先考虑与来自癌症GWAS的易感基因座内的基因作图显示显著共表达的基因。我们观察到,优先考虑的基因强烈富集了COSMIC定义的癌症驱动因素,IntOGen和Dietlein等人。当使用源自相关起源组织的非癌症样品的共表达网络时,已知癌症驱动基因的富集是最显著的。
    结论:我们展示了由癌症GWAS鉴定的风险基因座内的基因如何通过组织特异性共表达网络与已知的癌症驱动基因相关联。这提供了一个重要的解释,解释了为什么看似无关的基因集携带种系危险因素或体细胞突变最终会导致相同类型的疾病。
    BACKGROUND: The genetic background of cancer remains complex and challenging to integrate. Many somatic mutations within genes are known to cause and drive cancer, while genome-wide association studies (GWAS) of cancer have revealed many germline risk factors associated with cancer. However, the overlap between known somatic driver genes and positional candidate genes from GWAS loci is surprisingly small. We hypothesised that genes from multiple independent cancer GWAS loci should show tissue-specific co-regulation patterns that converge on cancer-specific driver genes.
    RESULTS: We studied recent well-powered GWAS of breast, prostate, colorectal and skin cancer by estimating co-expression between genes and subsequently prioritising genes that show significant co-expression with genes mapping within susceptibility loci from cancer GWAS. We observed that the prioritised genes were strongly enriched for cancer drivers defined by COSMIC, IntOGen and Dietlein et al. The enrichment of known cancer driver genes was most significant when using co-expression networks derived from non-cancer samples of the relevant tissue of origin.
    CONCLUSIONS: We show how genes within risk loci identified by cancer GWAS can be linked to known cancer driver genes through tissue-specific co-expression networks. This provides an important explanation for why seemingly unrelated sets of genes that harbour either germline risk factors or somatic mutations can eventually cause the same type of disease.
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  • 文章类型: Journal Article
    背景:大豆与固氮根际细菌建立了相互作用,通过共生固氮获得大部分氮需求。这种作物容易缺水;有证据表明,它的结瘤状态-无论是否结瘤-都会影响它对缺水的反应。已证明基因表达的翻译控制步骤与遭受水分亏缺的植物有关。
    结果:这里,我们分析了大豆根在转录时对水分亏缺的差异反应,翻译,和混合(转录+翻译)水平。因此,分析了四个联合处理的大豆根的转录组和翻译组。我们在结瘤和水分限制植物的翻译体水平上的差异表达基因(DEG)中发现了激素代谢相关基因。此外,加权基因共表达网络分析,然后进行差异表达分析,确定了与结瘤和缺水条件相关的基因模块。对与植物对结瘤反应相关的模块的混合DEG子集进行了蛋白质-蛋白质相互作用网络分析,缺水,或他们的组合。
    结论:我们的研究表明,上述植物反应中的突出过程和途径部分不同;与谷胱甘肽代谢和激素信号转导有关的术语(2C蛋白磷酸酶)与水分亏缺的反应有关,与跨膜运输相关的术语,对脱落酸的反应,色素代谢过程与结瘤和水分亏缺的反应有关。尽管如此,两个过程是常见的:半乳糖代谢和支链氨基酸分解代谢。对这些过程的全面分析可能会导致确定大豆耐旱性的新来源。
    BACKGROUND: Soybean establishes a mutualistic interaction with nitrogen-fixing rhizobacteria, acquiring most of its nitrogen requirements through symbiotic nitrogen fixation. This crop is susceptible to water deficit; evidence suggests that its nodulation status-whether it is nodulated or not-can influence how it responds to water deficit. The translational control step of gene expression has proven relevant in plants subjected to water deficit.
    RESULTS: Here, we analyzed soybean roots\' differential responses to water deficit at transcriptional, translational, and mixed (transcriptional + translational) levels. Thus, the transcriptome and translatome of four combined-treated soybean roots were analyzed. We found hormone metabolism-related genes among the differentially expressed genes (DEGs) at the translatome level in nodulated and water-restricted plants. Also, weighted gene co-expression network analysis followed by differential expression analysis identified gene modules associated with nodulation and water deficit conditions. Protein-protein interaction network analysis was performed for subsets of mixed DEGs of the modules associated with the plant responses to nodulation, water deficit, or their combination.
    CONCLUSIONS: Our research reveals that the stand-out processes and pathways in the before-mentioned plant responses partially differ; terms related to glutathione metabolism and hormone signal transduction (2 C protein phosphatases) were associated with the response to water deficit, terms related to transmembrane transport, response to abscisic acid, pigment metabolic process were associated with the response to nodulation plus water deficit. Still, two processes were common: galactose metabolism and branched-chain amino acid catabolism. A comprehensive analysis of these processes could lead to identifying new sources of tolerance to drought in soybean.
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  • 文章类型: Journal Article
    研究表明,心血管健康(CVH)与抑郁症有关。我们旨在使用全血转录组识别与抑郁症状和心血管健康指标共同相关的基因网络。
    我们分析了人类血液转录组数据,以确定基因共表达网络,称为基因模块,贝克的抑郁症清单(BDI-II)评分和心血管健康(CVH)指标作为抑郁症和心血管健康的标志,分别。BDI-II评分来自贝克的抑郁量表,一项21项自我报告清单,用于衡量抑郁症的特征和症状。CVH指标是根据美国心脏协会的标准使用七个指标定义的:吸烟,饮食,身体活动,体重指数(BMI),血压,总胆固醇,和空腹血糖。模块的联合协会,用加权共表达分析确定,以及具有抑郁和CVH标记的模块的成员基因用多变量方差分析(MANOVA)进行测试.
    我们鉴定了具有256个基因的基因模块,这些基因与BDI-II评分和CVH指标均显著相关。根据年龄和性别调整后的MANOVA测试结果,该模块与抑郁和CVH标志物相关.模块中三个最显著的成员基因是YOD1、RBX1和LEPR。模块中的基因富含涉及脑疾病如阿尔茨海默氏症的生物通路,帕金森,和亨廷顿的。
    鉴定的基因模块及其成员可以为抑郁症和CVH提供新的联合生物标志物。
    UNASSIGNED: Studies have shown that cardiovascular health (CVH) is related to depression. We aimed to identify gene networks jointly associated with depressive symptoms and cardiovascular health metrics using the whole blood transcriptome.
    UNASSIGNED: We analyzed human blood transcriptomic data to identify gene co-expression networks, termed gene modules, shared by Beck\'s depression inventory (BDI-II) scores and cardiovascular health (CVH) metrics as markers of depression and cardiovascular health, respectively. The BDI-II scores were derived from Beck\'s Depression Inventory, a 21-item self-report inventory that measures the characteristics and symptoms of depression. CVH metrics were defined according to the American Heart Association criteria using seven indices: smoking, diet, physical activity, body mass index (BMI), blood pressure, total cholesterol, and fasting glucose. Joint association of the modules, identified with weighted co-expression analysis, as well as the member genes of the modules with the markers of depression and CVH were tested with multivariate analysis of variance (MANOVA).
    UNASSIGNED: We identified a gene module with 256 genes that were significantly correlated with both the BDI-II score and CVH metrics. Based on the MANOVA test results adjusted for age and sex, the module was associated with both depression and CVH markers. The three most significant member genes in the module were YOD1, RBX1, and LEPR. Genes in the module were enriched with biological pathways involved in brain diseases such as Alzheimer\'s, Parkinson\'s, and Huntington\'s.
    UNASSIGNED: The identified gene module and its members can provide new joint biomarkers for depression and CVH.
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  • 文章类型: Journal Article
    肉牛行业经历了由市场对健康肉类的需求推动的转变,近年来的成本效率和环境可持续性。因此,在牛育种计划中,人们越来越关注肉类的脂肪酸含量和功能。此外,深入了解影响与脂肪酸谱相关的不同表型表达的生物学机制至关重要。在这项研究中,我们旨在鉴定与基因组中描述的脂肪酸谱相关的候选基因中的单核苷酸变异体(SNV)和插入/缺失(InDels)DNA变异体,在肉牛品种中进行的转录组学和蛋白质组学研究。利用巴西本地适应的牛品种的全基因组重新测序数据,即卡拉库和潘塔尼罗,我们鉴定了与23,947个基因相关的SNVs和InDels。从这些,我们鉴定出318个与脂肪酸谱相关的候选基因,这些基因含有变异.随后,我们只选择启动子中含有SNV和InDels的基因,5\'UTR和编码区。通过基因-生物过程网络,突出显示了大约19个基因。此外,考虑到研究的特点和文献综述,我们选择了主要的转录因子(TF)。通过基因-TF网络的功能分析使我们能够鉴定出30个最可能用于牛肉脂肪酸谱的候选基因。LIPE,MFSD2A和SREBF1基因由于其生物学重要性而在网络中突出显示。对这些基因的进一步解剖揭示了在Caracu和Pantaneiro序列的启动子区域中发现的15种新变体。基因网络促进了对基因和TF的更好的功能理解,能够鉴定与牛肉脂肪酸谱候选基因表达潜在相关的变异。
    The beef cattle industry has experienced a shift driven by a market demand for healthier meat, cost efficiency and environmental sustainability in recent years. Consequently, there has been a growing focus on the fatty acids content and functions of meat in cattle breeding programmes. Besides, a deeper understanding of the biological mechanisms influencing the expression of different phenotypes related to fatty acid profiles is crucial. In this study, we aimed to identify Single-Nucleotide Variants (SNV) and Insertion/Deletion (InDels) DNA variants in candidate genes related to fatty acid profiles described in genomic, transcriptomic and proteomic studies conducted in beef cattle breeds. Utilizing whole-genome re-sequencing data from Brazilian locally adapted bovine breeds, namely Caracu and Pantaneiro, we identified SNVs and InDels associated with 23,947 genes. From these, we identified 318 candidate genes related to fatty acid profiles that contain variants. Subsequently, we select only genes with SNVs and InDels in their promoter, 5\' UTR and coding region. Through the gene-biological process network, approximately 19 genes were highlighted. Furthermore, considering the studied trait and a literature review, we selected the main transcription factors (TF). Functional analysis via gene-TF network allowed us to identify the 30 most likely candidate genes for meat fatty acid profile in cattle. LIPE, MFSD2A and SREBF1 genes were highlighted in networks due to their biological importance. Further dissection of these genes revealed 15 new variants found in promoter regions of Caracu and Pantaneiro sequences. The gene networks facilitated a better functional understanding of genes and TF, enabling the identification of variants potentially related to the expression of candidate genes for meat fatty acid profiles in cattle.
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  • 文章类型: Journal Article
    本研究使用图神经网络(GNN)探讨了自闭症谱系障碍(ASD)的遗传风险关联,利用Sfari数据集和蛋白质相互作用网络(PIN)数据。我们建立了一个以基因为节点的基因网络,染色体带位置作为节点特征,和基因相互作用作为边缘。采用图模型对与新引入的基因(测试集)相关的自闭症风险进行分类。进行了三个分类任务来测试我们模型的能力:二元风险关联,多类风险关联,和综合征基因关联。我们测试了图卷积网络,GraphSage,图形变压器,和多层感知器(基线)架构在这个问题上。GraphSage模型始终优于其他模型,展示其在ASD相关基因分类中的实用性。我们的消融研究表明,染色体带位置和蛋白质相互作用包含了该问题的有用信息。模型在二元风险分类上达到了85.80%的准确率,多类风险分类准确率为81.68%,和90.22%的综合征分类。
    This study explores the genetic risk associations with autism spectrum disorder (ASD) using graph neural networks (GNNs), leveraging the Sfari dataset and protein interaction network (PIN) data. We built a gene network with genes as nodes, chromosome band location as node features, and gene interactions as edges. Graph models were employed to classify the autism risk associated with newly introduced genes (test set). Three classification tasks were undertaken to test the ability of our models: binary risk association, multi-class risk association, and syndromic gene association. We tested graph convolutional networks, Graph Sage, graph transformer, and Multi-Layer Perceptron (Baseline) architectures on this problem. The Graph Sage model consistently outperformed the other models, showcasing its utility in classifying ASD-related genes. Our ablation studies show that the chromosome band location and protein interactions contain useful information for this problem. The models achieved 85.80% accuracy on the binary risk classification, 81.68% accuracy on the multi-class risk classification, and 90.22% on the syndromic classification.
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  • 文章类型: Journal Article
    番茄果实的内在和遗传决定的成熟程序通常取决于组织和阶段特异性转录因子在空间和时间上的适当激活。在过去的二十年中,在详细说明这些复杂的转录以及对肉质果实成熟至关重要的激素调节回路方面取得了相当大的进展。这种非线性成熟过程受到MADS-box和NOR蛋白家族的强烈控制,触发与果实成熟进程相关的转录反应。深入了解MADS-RIN与植物激素相关转录因子之间的联系,如ERF和ARF,进一步结合了几个信号单元并行工作以定义输出果实成熟转录组的想法。除了这些TFs,其他转录因子家族的作用,如MYB,GLK,WRKY,GRAS和bHLH也已成为重要的成熟调节剂。其他调节因子如EIN和EIL蛋白也决定成熟果实的转录景观。尽管科学领域对成熟网络的复杂频谱有丰富的知识,识别更多的成熟效应将为在分子水平上更好地理解肉质果实成熟铺平道路。本文综述了番茄果实成熟的转录调控因子。
    An intrinsic and genetically determined ripening program of tomato fruits often depends upon the appropriate activation of tissue- and stage-specific transcription factors in space and time. The past two decades have yielded considerable progress in detailing these complex transcriptional as well as hormonal regulatory circuits paramount to fleshy fruit ripening. This non-linear ripening process is strongly controlled by the MADS-box and NOR family of proteins, triggering a transcriptional response associated with the progression of fruit ripening. Deepening insights into the connection between MADS-RIN and plant hormones related transcription factors, such as ERFs and ARFs, further conjugates the idea that several signaling units work in parallel to define an output fruit ripening transcriptome. Besides these TFs, the role of other families of transcription factors such as MYB, GLK, WRKY, GRAS and bHLH have also emerged as important ripening regulators. Other regulators such as EIN and EIL proteins also determine the transcriptional landscape of ripening fruits. Despite the abundant knowledge of the complex spectrum of ripening networks in the scientific domain, identifying more ripening effectors would pave the way for a better understanding of fleshy fruit ripening at the molecular level. This review provides an update on the transcriptional regulators of tomato fruit ripening.
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