transcription regulation

转录调控
  • 文章类型: Review
    单核细胞/巨噬细胞谱系的特点是多样性和可塑性,主要表现为身体组织中的M1和M2亚型,在豁免权中扮演不同的角色。在巨噬细胞的极化过程中,经典的分子机制与序列转录因子有关。无论是在肿瘤还是炎症局部微环境中,局部微环境的病理因素往往影响M1和M2巨噬细胞的极化,并参与这些病理过程的发生和发展。近年来,越来越多的研究结果表明,非编码RNA(ncRNA)也参与巨噬细胞的极化过程,除了传统的细胞因子和转录调控信号通路分子。在众多ncRNAs中,microRNAs(miRNAs)引起了国内外学者的广泛关注,基础和临床研究取得重大进展。因此,为了更好地理解miRNAs在巨噬细胞极化中的分子机制,并分析该调节途径在肿瘤和炎症干预治疗中的潜在价值,对相关文献的研究进展进行了全面回顾,并提出了一些观点和观点。
    The characteristics of monocyte/macrophage lineage are diversity and plasticity, mainly manifested by M1 and M2 subtypes in the body tissues, and playing different roles in the immunity. In the polarization process of macrophages, the classic molecular mechanism is related to sequential transcription factors. Whether in tumor or inflammatory local microenvironment, the pathological factors of the local microenvironment often affect the polarization of M1 and M2 macrophages, and participate in the occurrence and development of these pathological processes. In recent years, a growing number of research results demonstrated that non‑coding RNA (ncRNA) also participates in the polarization process of macrophages, in addition to traditional cytokines and transcriptional regulation signal pathway molecules. Among numerous ncRNAs, microRNAs (miRNAs) have attracted more attention from scholars both domestically and internationally, and significant progress has been made in basic and clinical research. Therefore, for improved understanding of the molecular mechanism of miRNAs in macrophage polarization and analysis of the potential value of this regulatory pathway in tumor and inflammatory intervention therapy, a comprehensive review of the progress of relevant literature research was conducted and some viewpoints and perspectives were proposed.
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  • 文章类型: Journal Article
    JAZ蛋白参与茉莉酸信号通路的调节,负责各种生理过程,比如防御反应,适应非生物胁迫,增长,和拟南芥的发育。JAZ蛋白的保守结构域可以作为一系列调节蛋白的结合位点,这些蛋白-蛋白配对的多样性导致多种功能结果。植物生长和防御是两个相互冲突的生理过程,导致不良的植物权衡。最近的观察揭示了JAZ4的显着特征;它既是植物免疫又是生长发育的负调节剂。我们建议这些复杂的生物过程可以在JAZ4调控节点解耦,由于JAZ4在特定组织和器官中的突出表达。这种作用的空间分离可以解释在没有JAZ4的情况下,植物根和芽的抗病性和大小增加。在组织层面,JAZ4可能在乙烯和生长素等激素之间的串扰中发挥作用,以控制器官分化。破译JAZ4对不同组织中特定调节因子和下游反应的结合是揭示开发新作物改良策略的分子机制的关键。
    JAZ proteins are involved in the regulation of the jasmonate signaling pathway, which is responsible for various physiological processes, such as defense response, adaptation to abiotic stress, growth, and development in Arabidopsis. The conserved domains of JAZ proteins can serve as binding sites for a broad array of regulatory proteins and the diversity of these protein-protein pairings result in a variety of functional outcomes. Plant growth and defense are two physiological processes that can conflict with each other, resulting in undesirable plant trade-offs. Recent observations have revealed a distinguishing feature of JAZ4; it acts as negative regulator of both plant immunity and growth and development. We suggest that these complex biological processes can be decoupled at the JAZ4 regulatory node, due to prominent expression of JAZ4 in specific tissues and organs. This spatial separation of actions could explain the increased disease resistance and size of the plant root and shoot in the absence of JAZ4. At the tissue level, JAZ4 could play a role in crosstalk between hormones such as ethylene and auxin to control organ differentiation. Deciphering biding of JAZ4 to specific regulators in different tissues and the downstream responses is key to unraveling molecular mechanisms toward developing new crop improvement strategies.
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  • 文章类型: Journal Article
    ClPKs是丝氨酸/苏氨酸(Ser/Thr)蛋白激酶的亚类。CBL是普遍存在的Ca2传感器,可在次级Ca2信使的帮助下与CIPK相互作用,以调节植物的生长和发育以及对植物面临的胁迫的响应。CIPK-CBL相互作用在植物中的不同作用包括对环境胁迫(盐,冷,干旱,pH值,ABA信号,和离子毒性),离子稳态(K+,NH4+,NO3-,和微量元素稳态),生物应激,和植物发育。该基因家族的每个成员都产生不同的蛋白质,这些蛋白质通过与钙离子信号相互作用来帮助植物适应各种胁迫或刺激。CIPK由两个结构域组成-N末端结构域和C末端结构域-通过接合结构域连接。N端域,磷酸化位点,也称为激活域和激酶域。C端,也被称为CIPK的调节域,还包括NAF/FISL和PPI。CBL包含四个EF结构域和保守的PFPF基序,并且是与CIPK的NAF/FISL结构域结合以形成CBL-CIPK复合物的位点。此外,我们还对从WoSCC中提取的CIPK基因家族数据进行了文献计量学分析.共检索到95份文件,已由47个来源发布。随着时间的推移,生产呈锯齿状。最关键的术语是基因,CIPK,非生物胁迫,和基因表达。北京林业大学是最高隶属关系,而植物细胞是最高来源。该基因家族的基因组学和代谢组学需要更多的研究。
    CIPKs are a subclass of serine/threonine (Ser/Thr) protein kinases. CBLs are ubiquitous Ca2+ sensors that interact with CIPK with the aid of secondary Ca2+ messengers for regulation of growth and development and response to stresses faced by plants. The divergent roles of the CIPK-CBL interaction in plants include responding to environmental stresses (salt, cold, drought, pH, ABA signaling, and ion toxicity), ion homeostasis (K+, NH4 +, NO3 -, and microelement homeostasis), biotic stress, and plant development. Each member of this gene family produces distinct proteins that help plants adapt to diverse stresses or stimuli by interacting with calcium ion signals. CIPK consists of two structural domains-an N-terminal domain and a C-terminal domain-connected by a junction domain. The N-terminal domain, the site of phosphorylation, is also called the activation domain and kinase domain. The C-terminal, also known as the regulatory domain of CIPK, further comprises NAF/FISL and PPI. CBL comprises four EF domains and conserved PFPF motifs and is the site of binding with the NAF/FISL domain of CIPK to form a CBL-CIPK complex. In addition, we also performed a bibliometric analysis of the CIPK gene family of data extracted from the WoSCC. A total of 95 documents were retrieved, which had been published by 47 sources. The production over time was zigzagged. The top key terms were gene, CIPK, abiotic stress, and gene expression. Beijing Forestry University was the top affiliation, while The Plant Cell was the top source. The genomics and metabolomics of this gene family require more study.
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  • 文章类型: Journal Article
    Synpolydantyly(SPD)是一种遗传性先天性肢体畸形,具有明显的并指SPD1,SPD2和SPD3。SPD1是由HOXD13的突变引起的,HOXD13是对肢体发育至关重要的同源盒转录因子。据报道,超过143名SPD患者携带HOXD13突变,但缺乏基因型-表型相关性。我们报告了c的新错义突变。925A>T(p。I309F)在一个从父亲那里继承的非典型多指的个体中,具有轻度的斜指,并且在12个中国SPD家族中通过全外显子组测序(WES)鉴定出HOXD13中的其他三个不同的丙氨酸插入突变。与聚丙氨酸延伸不同,如分子模拟和免疫荧光所示,它倾向于形成α-螺旋并导致蛋白质在细胞质中聚集,c.925A>T突变损害EPHA7的下游转录。我们收集了文献发现,并分析了53个家庭的173个SPD个体的基因型-表型特征,包括12个新确定的家庭。在与HOXD13相关的个人中,突变分布在三个区域:聚丙氨酸,Homeobox,和非homeobox。聚丙氨酸延伸是最常见的变异(45%),其次是错义突变(32%),主要在同源异型盒中,而功能丧失(LOF)变异更可能在非同源异型盒中。此外,更严重的程度和经典的SPD与多丙氨酸突变相关,尽管错义变异与手和脚中的短指和并指以及手中的斜指的LOF变异相关.我们的研究拓宽了HOXD13突变谱,揭示了三种不同变异的概况及其SPD的严重程度,与HOXD13突变位点相关的基因型-表型相关性提供了临床见解,包括遗传咨询。
    Synpolydactyly (SPD) is a hereditary congenital limb malformation with distinct syndactyly designated as SPD1, SPD2, and SPD3. SPD1 is caused by mutations of HOXD13, which is a homeobox transcription factor crucial for limb development. More than 143 SPD patients have been reported to carry HOXD13 mutations, but there is a lack of genotype-phenotype correlation. We report a novel missense mutation of c. 925A > T (p.I309F) in an individual with atypical synpolydactyly inherited from her father with mild clinodactyly and three other different alanine insertion mutations in HOXD13 identified by whole exome sequencing (WES) in 12 Chinese SPD families. Unlike polyalanine extension, which tends to form α-helix and causes protein aggregation in the cytoplasm as shown by molecular simulation and immunofluorescence, the c. 925A > T mutation impairs downstream transcription of EPHA7. We compiled literature findings and analyzed genotype-phenotype features in 173 SPD individuals of 53 families, including 12 newly identified families. Among the HOXD13-related individuals, mutations were distributed in three regions: polyalanine, homeobox, and non-homeobox. Polyalanine extension was the most common variant (45%), followed by missense mutations (32%) mostly in the homeobox compared with the loss-of-function (LOF) variants more likely in non-homeobox. Furthermore, a more severe degree and classic SPD were associated with polyalanine mutations although missense variants were associated with brachydactyly and syndactyly in hands and feet and LOF variants with clinodactyly in hands. Our study broadens the HOXD13 mutation spectrum and reveals the profile of three different variants and their severity of SPD, the genotype-phenotype correlation related to the HOXD13 mutation site provides clinical insight, including for genetic counseling.
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  • 文章类型: Journal Article
    Aberrant gene expression can contribute to brain and nervous system dysfunction that causes many psychiatric illnesses. Here, we review how transcriptomic approaches have deepened our understanding of the neurobiological underpinnings of psychiatric disorders and how they have to the identification of biomarkers for these disorders, with a focus on their relevance to suicide and suicide behaviors. We begin by providing an overview of the genetic, transcriptomic, and epigenetic factors (including non-coding RNAs) implicated in suicide and their roles in the regulation of gene expression. Then, we highlight the unique benefits and limitations of using either postmortem brain or peripheral tissues in transcriptomic analyses. We examine the current shift from candidate gene to genome-wide approaches in psychiatric research, which are concurrently emerging with the increased consideration of the Research Domain Criteria (RDoC) framework for classifying mental illnesses. Furthermore, we discuss the use of transcription networks and how they can be integrated into multiomic analyses. Finally, we end by highlighting recent findings of peripheral markers of suicide risk identified through the use of transcriptomic tools. Technological advancements and increased accessibility of these technologies are drastically shaping the current research landscape. We present an overview of the significant changes currently taking place to usher in a new era of psychiatric research.
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