transcription factors

转录因子
  • 文章类型: Journal Article
    背景:梅花鹿(Cervusnippon)在子宫颈中具有重要意义,最近出版了三个基因组。然而,这些基因组仍然包含数百个缺口,在连续性和准确性方面存在显著差异.这对功能基因组学研究和选择合适的参考基因组提出了挑战。因此,获得高质量的参考基因组是有效深入研究功能基因组学的当务之急。
    结果:在这里,我们报告了雄性梅花鹿的高质量共有基因组。所有34条染色体都组装成单重叠群假分子,没有任何间隙,这是最完整的组装。基因组大小为2.7G,具有23,284个蛋白质编码基因。比较基因组学分析发现,梅花鹿和马鹿的基因组高度保守,具有高达99%的序列相似性的大约2.4G共线区域。同时,我们观察到马鹿的Chr23和Chr4在进化过程中的融合,形成梅花鹿的Chr1。此外,我们确定了607个转录因子(TFs)参与鹿茸发育的调节,包括RUNX2、SOX6、SOX8、SOX9、PAX8、SIX2、SIX4、SIX6、SPI1、NFAC1、KLHL8、ZN710、JDP2和TWST2。
    结论:我们的结果表明我们获得了高质量的共有参考基因组。这为理解功能基因组学提供了宝贵的资源。此外,发现了梅花红杂种育性的遗传基础,并确定了607个影响鹿茸发育的重要TFs。
    BACKGROUND: Sika deer (Cervus nippon) holds significance among cervids, with three genomes recently published. However, these genomes still contain hundreds of gaps and display significant discrepancies in continuity and accuracy. This poses challenges to functional genomics research and the selection of an appropriate reference genome. Thus, obtaining a high-quality reference genome is imperative to delve into functional genomics effectively.
    RESULTS: Here we report a high-quality consensus genome of male sika deer. All 34 chromosomes are assembled into single-contig pseudomolecules without any gaps, which is the most complete assembly. The genome size is 2.7G with 23,284 protein-coding genes. Comparative genomics analysis found that the genomes of sika deer and red deer are highly conserved, an approximately 2.4G collinear regions with up to 99% sequence similarity. Meanwhile, we observed the fusion of red deer\'s Chr23 and Chr4 during evolution, forming sika deer\'s Chr1. Additionally, we identified 607 transcription factors (TFs) that are involved in the regulation of antler development, including RUNX2, SOX6, SOX8, SOX9, PAX8, SIX2, SIX4, SIX6, SPI1, NFAC1, KLHL8, ZN710, JDP2, and TWST2, based on this consensus reference genome.
    CONCLUSIONS: Our results indicated that we acquired a high-quality consensus reference genome. That provided valuable resources for understanding functional genomics. In addition, discovered the genetic basis of sika-red hybrid fertility and identified 607 significant TFs that impact antler development.
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  • 文章类型: Journal Article
    芳香烃受体(AHR)是苯并[a]芘(BaP)和2,3,7,8-四氯二苯并对二恶英(TCDD)毒性作用的主要介质之一。然而,大量受BAP和TCDD影响的基因可能提示一个更复杂的转录调控网络,驱动这两种化学物质的共同不良反应.与TCDD不同,BaP在肝脏中快速代谢,产生具有可疑的结合和激活AHR能力的产品。在这项研究中,我们使用来自暴露于BAP和TCCD的人肝细胞系HepG2的转录组学数据,并进行差异特征基因网络分析,以了解基因之间的相关性,并阐明BaP和TCDD作用中的共同调节机制。将基因分为11个元模块,总体保留率为0.72,并分为三个共有时间簇:12、24和48h。分析表明,每个时间簇中的共有基因都直接受AHR或AHR-TF相互作用的调节。一些TFs与AHR形成直接的物理相互作用,如ESR1、FOXA1和E2F1,而另一些,包括CTCF,RXRA,FOXO1CEBPA,CEBPB,和TP53显示与AHR的间接相互作用。对生物过程(BPs)的分析确定了BaP和TCDD样品中独特和常见的BPs,在所有三个时间点检测到DNA损伤反应。总之,我们确定了BaP和TCDD共有的一致转录调控网络,由直接AHR靶标和AHR-TF靶标组成.该分析为肝细胞中基因毒性(BaP)和非基因毒性(TCDD)化学物质的共同作用机制提供了新的思路。
    Aryl hydrocarbon receptor (AHR) is one of the main mediators of the toxic effects of benzo[a]pyrene (BaP) and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). However, a vast number of BaP- and TCDD-affected genes may suggest a more complex transcriptional regulatory network driving common adverse effects of these two chemicals. Unlike TCDD, BaP is rapidly metabolized in the liver, yielding products with a questionable ability to bind and activate AHR. In this study, we used transcriptomics data from the BaP- and TCCD-exposed human liver cell line HepG2, and performed differential eigengene network analysis to understand the correlation among genes and to untangle the common regulatory mechanism in the action of BaP and TCDD. The genes were grouped into 11 meta-modules with an overall preservation of 0.72 and were also segregated into three consensus time clusters: 12, 24, and 48 h. The analysis showed that the consensus genes in each time cluster were either directly regulated by the AHR or the AHR-TF interactions. Some TFs form a direct physical interaction with AHR such as ESR1, FOXA1, and E2F1, whereas others, including CTCF, RXRA, FOXO1, CEBPA, CEBPB, and TP53 show an indirect interaction with AHR. The analysis of biological processes (BPs) identified unique and common BPs in BaP and TCDD samples, with DNA damage response detected in all three time points. In summary, we identified a consensus transcriptional regulatory network common for BaP and TCDD consisting of direct AHR targets and AHR-TF targets. This analysis sheds new light on the common mechanism of action of a genotoxic (BaP) and non-genotoxic (TCDD) chemical in liver cells.
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  • 文章类型: Review
    上皮样肉瘤(EpS)是一种极为罕见的恶性软组织癌,主要影响青少年和年轻人。尽管积极的多模式疗法结合手术,但在约50%的病例中,EpS通常表现出不利的临床过程,具有致命的结果。化疗,和辐照。EpS传统上被归类为更常见的,不那么积极的远端(经典)类型,和罕见的侵略性近端类型。这两种亚型的特征在于核INI1表达的丧失,最常见的是其编码基因SMARCB1-SWI/SNF染色质重塑复合物的核心亚基的纯合缺失。2020年,EZH2抑制剂tazemetostat是第一个批准用于EpS的靶向疗法,带来新的希望。尽管如此,绝大多数患者没有从这种药物中获益或迅速复发.Further,其他最近的治疗方式,包括免疫疗法,只对一小部分患者有效。因此,新颖的策略,专门针对EpS,迫切需要。为了加快对EpS的转化研究,并最终促进新诊断工具和治疗方案的发现和开发,在过去几年中,一个充满活力的翻译研究社区已经形成,并在2021年和2023年举行了两次国际EpS数字专家会议。这篇综述从转化研究的角度总结了我们目前对EpS的理解,并指出了创新的研究方向,以解决该领域最紧迫的问题。根据专家共识和患者倡导团体的定义。
    Epithelioid sarcoma (EpS) is an ultra-rare malignant soft-tissue cancer mostly affecting adolescents and young adults. EpS often exhibits an unfavorable clinical course with fatal outcome in ∼50% of cases despite aggressive multimodal therapies combining surgery, chemotherapy, and irradiation. EpS is traditionally classified in a more common, less aggressive distal (classic) type and a rarer aggressive proximal type. Both subtypes are characterized by a loss of nuclear INI1 expression, most often following homozygous deletion of its encoding gene, SMARCB1-a core subunit of the SWI/SNF chromatin remodeling complex. In 2020, the EZH2 inhibitor tazemetostat was the first targeted therapy approved for EpS, raising new hopes. Still, the vast majority of patients did not benefit from this drug or relapsed rapidly. Further, other recent therapeutic modalities, including immunotherapy, are only effective in a fraction of patients. Thus, novel strategies, specifically targeted to EpS, are urgently needed. To accelerate translational research on EpS and eventually boost the discovery and development of new diagnostic tools and therapeutic options, a vibrant translational research community has formed in past years and held two international EpS digital expert meetings in 2021 and 2023. This review summarizes our current understanding of EpS from the translational research perspective and points to innovative research directions to address the most pressing questions in the field, as defined by expert consensus and patient advocacy groups.
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  • 文章类型: English Abstract
    随着与复发性驱动分子改变相关的新实体的描述,子宫肉瘤的景观变得越来越复杂。子宫肉瘤,类似于软组织肉瘤,分为复杂基因组肉瘤和简单基因组肉瘤。平滑肌肉瘤和未分化子宫肉瘤属于复杂基因组肉瘤组。低级和高级子宫内膜间质肉瘤,其他与融合转录本相关的罕见肿瘤(如NTRK,PDGFB,ALK,RETROS1)和SMARCA4缺陷型子宫肉瘤被认为是简单的基因组肉瘤。最常见的子宫肉瘤首先是平滑肌肉瘤,其次是子宫内膜间质肉瘤。平滑肌肉瘤的三种不同组织学亚型(梭形,粘液样,上皮样)被识别,粘液样和上皮样平滑肌肉瘤比梭形平滑肌肉瘤更具侵袭性。低级和高级子宫内膜间质肉瘤之间的区别主要是形态学和免疫组织化学,融合转录本的检测可以帮助诊断。子宫PEComa是一种罕见的肿瘤,分为边缘和恶性,根据风险评估算法。子宫颈的胚胎性横纹肌肉瘤在儿童中更常见,但也可发生在成年女性中。子宫颈的胚胎性横纹肌肉瘤几乎总是DICER1突变,与野生型DICER1的阴道和DICER1突变但频率较低的腺肉瘤不同。在新兴实体中,与涉及NTRK的融合转录本相关的肉瘤,ALK,PDGFB基因受益于靶向治疗。分子数据与组织学和临床数据的整合可以更好地鉴定子宫肉瘤,以便更好地治疗它们。
    The landscape of uterine sarcomas is becoming more complex with the description of new entities associated with recurrent driver molecular alterations. Uterine sarcomas, in analogy with soft tissue sarcomas, are distinguished into complex genomic and simple genomic sarcomas. Leiomyosarcomas and undifferentiated uterine sarcomas belong to complex genomic sarcomas group. Low-grade and high-grade endometrial stromal sarcomas, other rare tumors associated with fusion transcripts (such as NTRK, PDGFB, ALK, RET ROS1) and SMARCA4-deficient uterine sarcoma are considered simple genomic sarcomas. The most common uterine sarcoma are first leiomyosarcoma and secondly endometrial stromal sarcomas. Three different histological subtypes of leiomyosarcoma (fusiform, myxoid, epithelioid) are identified, myxoid and epithelioid leiomyosarcoma being more aggressive than fusiform leiomyosarcoma. The distinction between low-grade and high-grade endometrial stromal sarcoma is primarily morphological and immunohistochemical and the detection of fusion transcripts can help the diagnosis. Uterine PEComa is a rare tumor, which is distinguished into borderline and malignant, according to a risk assessment algorithm. Embryonal rhabdomyosarcoma of the uterine cervix is more common in children but can also occur in adult women. Embryonal rhabdomyosarcoma of the uterine cervix is almost always DICER1 mutated, unlike that of the vagina which is wild-type DICER1, and adenosarcoma which can be DICER1 mutated but with less frequency. Among the emerging entities, sarcomas associated with fusion transcripts involving the NTRK, ALK, PDGFB genes benefit from targeted therapy. The integration of molecular data with histology and clinical data allows better identification of uterine sarcomas in order to better treat them.
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  • 文章类型: Journal Article
    越来越多地认识到对血液癌症的种系易感性。高通量和全基因组测序的广泛采用正在识别大量的致病种系突变。六个基因的宪法致病性变异(DEAD-box解旋酶41[DDX41],ETS变异转录因子6[ETV6],CCAAT增强子结合蛋白α[CEBPA],RUNX家族转录因子1[RUNX1],含有26[ANKRD26]和GATA结合蛋白2[GATA2]的锚蛋白重复结构域)在增加血液学癌症的风险方面特别重要,其中一些基因的变异也与非恶性综合征特征相关。同种异体血液和骨髓移植(BMT)对于许多血液癌症的管理至关重要。种系变体的鉴定可能对患者和潜在的家庭供体有影响。除了选择合适的造血干细胞捐献者之外,迄今为止无症状亲属的识别和咨询可能存在敏感问题。如果需要BMT,临床上的紧迫性往往需要一种快速综合的多学科方法来进行检测和决策,血液学家与临床和实验室遗传学家合作。这里,我们在英国癌症遗传学小组(UKCGG)召开的一次会议之后,提出了最佳实践共识指南,英国癌症研究中心(CRUK)资助的CanGene-CanVar研究计划(CGCV),NHS英格兰基因组实验室中心(GLH)血液肿瘤学恶性肿瘤工作组和英国血液和骨髓移植及细胞治疗协会(BSBMTCT)。
    Germline predisposition to haematological cancers is increasingly being recognised. Widespread adoption of high-throughput and whole genome sequencing is identifying large numbers of causative germline mutations. Constitutional pathogenic variants in six genes (DEAD-box helicase 41 [DDX41], ETS variant transcription factor 6 [ETV6], CCAAT enhancer binding protein alpha [CEBPA], RUNX family transcription factor 1 [RUNX1], ankyrin repeat domain containing 26 [ANKRD26] and GATA binding protein 2 [GATA2]) are particularly significant in increasing the risk of haematological cancers, with variants in some of these genes also associated with non-malignant syndromic features. Allogeneic blood and marrow transplantation (BMT) is central to management in many haematological cancers. Identification of germline variants may have implications for the patient and potential family donors. Beyond selection of an appropriate haematopoietic stem cell donor there may be sensitive issues surrounding identification and counselling of hitherto asymptomatic relatives. If BMT is needed, there is frequently a clinical urgency that demands a rapid integrated multidisciplinary approach to testing and decision making involving haematologists in collaboration with Clinical and Laboratory Geneticists. Here, we present best practice consensus guidelines arrived at following a meeting convened by the UK Cancer Genetics Group (UKCGG), the Cancer Research UK (CRUK) funded CanGene-CanVar research programme (CGCV), NHS England Genomic Laboratory Hub (GLH) Haematological Oncology Malignancies Working Group and the British Society of Blood and Marrow Transplantation and Cellular Therapy (BSBMTCT).
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  • 文章类型: Journal Article
    这里首次提出了一种新颖的决策程序,以使用共识方法和k近邻(kNN)分类库而不是单个模型来识别活性/非活性和选择性/非选择性双重抑制剂。具有足够选择性的双重BRD4/PLK1抑制是针对高危患者肿瘤细胞的潜在治疗策略。我们报告了使用共识和kNN策略以及两种基于受体和基于配体的信息来源来鉴定活性和选择性双重BRD4/PLK1抑制剂的独特方法,这些信息是残基的排名结合能和重要的分子特征。分别。将共识方法的结果与单个kNN模型的结果进行了比较。使用三个不同的距离函数测量化学空间相似性以增加可靠性。所有活性和选择性分类模型均使用交叉验证和y-随机化测试进行验证。结果表明,共识方法可以将主动/非主动或选择性/非选择性检测的可靠性和准确性提高90%。与单个kNN模型相比,共识方法还达到了灵敏度和特异性的更平衡值,因为在整合各种信息源方面具有补偿作用。
    A novel decision-making procedure is proposed here for the first time to identify active/inactive and selective/non-selective dual inhibitors using consensus approaches and pools of k-nearest neighbours (kNN) classifications instead of individual models. Dual BRD4/PLK1 inhibition with adequate selectivity is a potential therapeutic strategy for targeting tumour cells in high-risk patients. We report the unique way to identify both active and selective dual BRD4/PLK1 inhibitors using consensus and kNN strategies together with two sources of receptor-based and ligand-based information which are the ranked binding energies of residues and important molecular features, respectively. The results of consensus approaches were compared with the results of individual kNN models. The chemical space similarity was measured using three different distance functions to increase the reliability. All activity and selectivity classification models were validated using cross-validation and y-randomization tests. The outcomes show that consensus approaches can increase the reliability and accuracy of active/inactive or selective/non-selective detections up to 90%. Consensus approaches also reached more balanced values of sensitivity and specificity compared to the individual kNN models because of the compensation in the integration of diverse sources of information.
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  • 文章类型: Journal Article
    背景:Triptans是偏头痛特异性急性治疗。在临床实践和研究中需要一个公认的曲坦失败的定义。本共识的主要目的是提供曲坦失败的定义。为了发展这个定义,我们认为有必要首先制定有效治疗急性偏头痛发作和曲坦类药物反应者的共识定义.
    方法:共识过程包括初步文献综述,德尔福回合和随后的公开讨论。根据共识小组,偏头痛发作的有效治疗应以患者的健康状况为特征,即a)头痛的改善,b)缓解非疼痛症状,c)无不良事件。如果患者的健康,攻击被认为是有效的治疗,如上所述,在2小时内和至少24小时内恢复。当给予的曲坦在四次偏头痛发作中的至少三次中导致有效的急性发作治疗时,患有偏头痛的个体被认为是曲坦反应者。另一方面,在单一曲坦失败的情况下,偏头痛患者被认为是曲坦无应答者(与曲坦应答者的定义不匹配).共识小组将偏头痛患者定义为在至少2种曲坦失败的情况下对曲坦耐药;曲坦难治性,在至少3个Triptans失败的情况下,包括皮下制剂;在存在公认的使用曲坦的禁忌症的情况下,如产品特性摘要中所述。
    结论:这些新的定义可用于评估偏头痛患者急性发作治疗的临床实践。它们可能有助于识别对曲坦类药物无反应且需要新型急性偏头痛治疗的人。这些定义也将有助于标准化偏头痛急性护理研究。
    BACKGROUND: Triptans are migraine-specific acute treatments. A well-accepted definition of triptan failure is needed in clinical practice and for research. The primary aim of the present Consensus was to provide a definition of triptan failure. To develop this definition, we deemed necessary to develop as first a consensus definition of effective treatment of an acute migraine attack and of triptan-responder.
    METHODS: The Consensus process included a preliminary literature review, a Delphi round and a subsequent open discussion. According to the Consensus Panel, effective treatment of a migraine attack is to be defined on patient well-being featured by a) improvement of headache, b) relief of non-pain symptoms and c) absence of adverse events. An attack is considered effectively treated if patient\'s well-being, as defined above, is restored within 2 hours and for at least 24 hours. An individual with migraine is considered as triptan-responder when the given triptan leads to effective acute attack treatment in at least three out of four migraine attacks. On the other hand, an individual with migraine is considered triptan non-responder in the presence of failure of a single triptan (not matching the definition of triptan-responder). The Consensus Panel defined an individual with migraine as triptan-resistant in the presence of failure of at least 2 triptans; triptan refractory, in the presence of failure to at least 3 triptans, including subcutaneous formulation; triptan ineligibile in the presence of an acknowledged contraindication to triptan use, as specified in the summary of product characteristics.
    CONCLUSIONS: The novel definitions can be useful in clinical practice for the assessment of acute attack treatments patients with migraine. They may be helpful in identifying people not responding to triptans and in need for novel acute migraine treatments. The definitions will also be of help in standardizing research on migraine acute care.
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  • 文章类型: Journal Article
    细胞壁的降解和重塑是导致果实成熟过程中软化的关键因素。
    探讨采后细胞壁代谢的潜在机制,需要一种转录组分析方法来对功能基因进行更宝贵的预测。
    采用乙烯(一种常规且有效的植物激素,以加速猕猴桃的更年期果实成熟和软化)或空气处理的猕猴桃作为材料。这里,共识共表达网络分析(CCNA),从R中的加权基因共表达网络分析(WGCNA)包演变而来的程序,应用并从12个转录组文库中生成85个共有簇。通过结合CCNA和WGCNA并引入生理性状,实现了高级和全面的修饰。包括坚定,细胞壁材料,纤维素,半纤维素,水溶性果胶,共价结合果胶和离子可溶性果胶。
    结果,六个细胞壁代谢相关结构基因AdGAL1、AdMAN1、AdPL1、AdPL5、Adβ-Gal5、AdPME1和四个转录因子AdZAT5、AdDOF3、AdNAC083、AdMYBR4被鉴定为果胶降解的枢纽候选基因。双荧光素酶系统和电泳迁移率变化分析验证了AdPL5和Adβ-Gal5的启动子被转录因子AdZAT5识别和反式激活。在乙烯处理的猕猴桃中观察到PL和β-Gal的相对较高的酶活性,进一步强调了这两个果胶相关基因对果实软化的关键作用。此外,在猕猴桃中稳定瞬时过表达AdZAT5显著增强AdPL5和Adβ-Gal5的表达,证实了转录因子与果胶相关基因的体内调控。
    因此,CCNA的修改和应用对于未知监管机构的珍贵网络钓鱼将是强大的。揭示AdZAT5是通过结合和调节效应基因AdPL5和Adβ-Gal5降解果胶的关键因素。
    Cell wall degradation and remodeling is the key factor causing fruit softening during ripening.
    To explore the mechanism underlying postharvest cell wall metabolism, a transcriptome analysis method for more precious prediction on functional genes was needed.
    Kiwifruits treated by ethylene (a conventional and effective phytohormone to accelerate climacteric fruit ripening and softening as kiwifruits) or air were taken as materials. Here, Consensus Coexpression Network Analysis (CCNA), a procedure evolved from Weighted Gene Co-expression Network Analysis (WGCNA) package in R, was applied and generated 85 consensus clusters from twelve transcriptome libraries. Advanced and comprehensive modifications were achieved by combination of CCNA and WGCNA with introduction of physiological traits, including firmness, cell wall materials, cellulose, hemicellulose, water soluble pectin, covalent binding pectin and ionic soluble pectin.
    As a result, six cell wall metabolisms related structural genes AdGAL1, AdMAN1, AdPL1, AdPL5, Adβ-Gal5, AdPME1 and four transcription factors AdZAT5, AdDOF3, AdNAC083, AdMYBR4 were identified as hub candidate genes for pectin degradation. Dual-luciferase system and electrophoretic mobility shift assays validated that promoters of AdPL5 and Adβ-Gal5 were recognized and trans-activated by transcription factor AdZAT5. The relatively higher enzyme activities of PL and β-Gal were observed in ethylene treated kiwifruit, further emphasized the critical roles of these two pectin related genes for fruit softening. Moreover, stable transient overexpression AdZAT5 in kiwifruit significantly enhanced AdPL5 and Adβ-Gal5 expression, which confirmed the in vivo regulations between transcription factor and pectin related genes.
    Thus, modification and application of CCNA would be powerful for the precious phishing the unknown regulators. It revealed that AdZAT5 is a key factor for pectin degradation by binding and regulating effector genes AdPL5 and Adβ-Gal5.
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  • 文章类型: Journal Article
    背景:根据最近的美国泌尿外科协会(AUA)关于血尿的指南,患者被分层为低,中间,和尿路上皮癌(UC)的高风险。这些风险组是基于临床因素,不纳入基于尿液的肿瘤标志物。
    目的:评估基于尿液的基因组检测是否能改善重新定义的血尿AUA风险分层。
    方法:我们选择了具有完整生物标志物状态的患者,根据尿液DNA评估,来自先前收集的前瞻性荷兰血尿队列(n=838)。根据性别将患者分为AUA风险类别,年龄,血尿类型。生物标志物状态包括FGFR3、TERT、和HRAS基因,OTX1、ONECUT2和TWIST1基因的甲基化状态。
    方法:主要终点是不同血尿风险组的诊断模型表现。进一步的分析使用Fagan列线图评估血尿亚组的测试前和测试后UC概率。
    结论:总体而言,65例患者(7.8%)被归类为低风险,106(12.6%)作为中等风险,667(79.6%)为高风险。肉眼血尿的UC发病率差异显著(21%,98/457)和显微镜下血尿(4%,14/381)组(p<0.001)。所有癌症病例都属于高危人群,其中UC发生率为16.8%(112/667)。诊断模型的应用揭示了所有风险组之间的稳健表现(接收器工作特征曲线0.929-0.971下的面积)。根据评估的风险组,尿液检测阴性与0.3-2%的试验后UC概率相关,而尿液检测阳性与试验后UC概率为31-42%相关.
    结论:本研究表明,基于尿液的基因组分析增加了血尿患者AUA指南分层的价值。对于尿检阴性的AUA低风险患者,安全地停止膀胱镜检查似乎是合理的。此外,对于AUA中危或高危且尿液检测阳性的患者,应加快评估。
    结果:尿液中有血液(血尿)的患者可以归类为低,中间,或在他们的泌尿道患癌症的高风险。我们发现,使用基于尿液的基因检测可以提高预测哪些患者最有可能患有癌症的准确性。测试阴性的患者可能能够避免侵入性测试,而进一步的测试可以优先考虑阳性测试的患者。
    According to the recent American Urological Association (AUA) guideline on hematuria, patients are stratified into groups with low, intermediate, and high risk of urothelial carcinoma (UC). These risk groups are based on clinical factors and do not incorporate urine-based tumor markers.
    To evaluate whether a urine-based genomic assay improves the redefined AUA risk stratification for hematuria.
    We selected patients with complete biomarker status, as assessed on urinary DNA, from a previously collected prospective Dutch hematuria cohort (n = 838). Patients were stratified into the AUA risk categories on the basis of sex, age, and type of hematuria. Biomarker status included mutation status for the FGFR3, TERT, and HRAS genes, and methylation status for the OTX1, ONECUT2, and TWIST1 genes.
    The primary endpoint was the diagnostic model performance for different hematuria risk groups. Further analyses assessed the pretest and post-test UC probability in the hematuria subgroups using a Fagan nomogram.
    Overall, 65 patients (7.8%) were classified as low risk, 106 (12.6%) as intermediate risk, and 667 (79.6%) as high risk. The UC incidence differed significantly between the gross hematuria (21%, 98/457) and microscopic hematuria (4%, 14/381) groups (p < 0.001). All cancer cases were in the high-risk group, which had UC incidence of 16.8% (112/667). Application of the diagnostic model revealed robust performance among all risk groups (area under the receiver operating characteristic curve 0.929-0.971). Depending on the risk group evaluated, a negative urine assay was associated with post-test UC probability of 0.3-2%, whereas a positive urine assay was associated with post-test UC probability of 31-42%.
    This study shows the value that a urine-based genomic assay adds to the AUA guideline stratification for patients with hematuria. It seems justified to safely withhold cystoscopy for patients with AUA low risk who have a negative urine assay. In addition, evaluation should be expedited for patients with AUA intermediate or high risk and a positive urine assay.
    Patients who have blood in their urine (hematuria) can be classified as having low, intermediate, or high risk of having cancer in their urinary tract. We found that use of a urine-based genetic test improves the accuracy of predicting which patients are most likely to have cancer. Patients with a negative test may be able to avoid invasive tests, while further tests could be prioritized for patients with a positive test.
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  • 文章类型: Journal Article
    HSF-1蛋白是热休克反应(HSR)的控制转录因子。它与热休克元件(HSE)的结合会诱导保守的热休克蛋白的强烈上调,包括HSP70s,Hsp40和小型HSP。除了这些众所周知的HSP,在C.elegans基因的启动子区域中发现了超过4000种其他HSE。在微阵列实验中,在热休克反应期间,很少有含有HSE的基因被特异性上调。相反,大多数4000个含HSE的基因不受高温的影响,并与与HSR无关的基因共表达。与HSP伴侣系统相关的几个基因也是如此,比如dnj-12、dnj-13和hsp-1。有趣的是,专用HSR基因的几个启动子,像F44E5.4p,hsp-16.48p或hsp-16.2p,在其启动子区域含有延伸的HSE,由四个或五个HSE元素组成,而不是共同的三聚体HSE。我们在此旨在理解HSF-1如何与不同启动子区域相互作用。为此,我们纯化了线虫HSF-1DBD,并研究了与包含这些区域的DNA序列的相互作用。EMSA试验表明,HSF-1DBD与大多数含有HSE的dsDNA相互作用,但有不同的特点。我们采用沉降分析超速离心(SV-AUC)来确定化学计量,亲和力,以及HSF-1DBD与这些HSE结合的协同性。有趣的是,大多数HSE显示HSF-1DBD的协同结合,最多结合五个DBD。在大多数情况下,与诱导型启动子的HSE结合更强,即使共识得分并不总是更高。观察到的HSF-1DBD对dnj-12的非诱导型HSE的高亲和力表明,一些启动子区域可能支持组成型表达,对于这种转录因子来说,这是显而易见的事实,这在非压力条件下也是必不可少的。
    The protein HSF-1 is the controlling transcription factor of the heat-shock response (HSR). Its binding to the heat-shock elements (HSEs) induces the strong upregulation of conserved heat-shock proteins, including Hsp70s, Hsp40s and small HSPs. Next to these commonly known HSPs, more than 4000 other HSEs are found in the promoter regions of C. elegans genes. In microarray experiments, few of the HSE-containing genes are specifically upregulated during the heat-shock response. Most of the 4000 HSE-containing genes instead are unaffected by elevated temperatures and coexpress with genes unrelated to the HSR. This is also the case for several genes related to the HSP chaperone system, like dnj-12, dnj-13, and hsp-1. Interestingly, several promoters of the dedicated HSR-genes, like F44E5.4p, hsp-16.48p or hsp-16.2p, contain extended HSEs in their promoter region, composed of four or five HSE-elements instead of the common trimeric HSEs. We here aim at understanding how HSF-1 interacts with the different promoter regions. To this end we purify the nematode HSF-1 DBD and investigate the interaction with DNA sequences containing these regions. EMSA assays suggest that the HSF-1 DBD interacts with most of these HSE-containing dsDNAs, but with different characteristics. We employ sedimentation analytical ultracentrifugation (SV-AUC) to determine stoichiometry, affinity, and cooperativity of HSF-1 DBD binding to these HSEs. Interestingly, most HSEs show cooperative binding of the HSF-1 DBD with up to five DBDs being bound. In most cases binding to the HSEs of inducible promoters is stronger, even though the consensus scores are not always higher. The observed high affinity of HSF-1 DBD to the non-inducible HSEs of dnj-12, suggests that constitutive expression may be supported from some promoter regions, a fact that is evident for this transcription factor, that is essential also under non-stress conditions.
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