transcripts

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  • 文章类型: Journal Article
    脂肪肝疾病进展为非酒精性脂肪性肝炎(NASH)是人类死亡的主要原因。生活方式和环境化学暴露会增加人类对NASH的易感性。在人类中,尿液中双酚A(BPA)的存在与脂肪肝疾病相关,但祖先BPA暴露是否导致未暴露后代中人类NAFLD-NASH相关基因的激活尚不清楚.在这项研究中,使用田高鱼作为人类NAFLD的动物模型,我们研究了人类NAFLD-NASH的转录特征及其在未直接暴露的鱼类肝脏发病机理中的相关作用,但是他们的祖先在三代前的胚胎和围产期发育过程中暴露于BPA。BPA谱系男性和女性medaka中肝脏的大量RNA-Seq数据与公开可用的人类NAFLD-NASH患者数据的比较揭示了medaka肝脏中人类NAFLD-NASH转录特征的跨代改变。在人类NAFLD患者和medaka中,20%的差异表达基因(DEGs)被上调。特别是在女性中,在BPA谱系鱼和NAFLD患者组的肝脏中,27.69%下调,20%上调。在所有的DEG中,在祖先的BPA谱系女性中发现了52.31%的DEGs,这表明女性的NAFLD共享大多数人类NAFLD基因网络。路径分析显示β氧化,脂蛋白代谢,和HDL/LDL介导的转运过程与BPA谱系男性和女性中下调的DEG相关。相比之下,仅在BPA谱系雌性的肝脏中,编码脂肪生成相关蛋白的基因的表达显着升高。表现出myc激活的BPA谱系雌性,atf4,xbp1,stat4,和癌变途径,以及igf1的失活,提示其可能与晚期NAFLD表型相关。目前的结果表明,在medaka中参与人类NAFLD和跨代NAFLD进展的基因网络是保守的,并且medaka可以是了解肝脏疾病的发展和进展以及肝脏中的环境影响的极好的动物模型。
    The progression of fatty liver disease to non-alcoholic steatohepatitis (NASH) is a leading cause of death in humans. Lifestyles and environmental chemical exposures can increase the susceptibility of humans to NASH. In humans, the presence of bisphenol A (BPA) in urine is associated with fatty liver disease, but whether ancestral BPA exposure leads to the activation of human NAFLD-NASH-associated genes in the unexposed descendants is unclear. In this study, using medaka fish as an animal model for human NAFLD, we investigated the transcriptional signatures of human NAFLD-NASH and their associated roles in the pathogenesis of the liver of fish that were not directly exposed, but their ancestors were exposed to BPA during embryonic and perinatal development three generations prior. Comparison of bulk RNA-Seq data of the liver in BPA lineage male and female medaka with publicly available human NAFLD-NASH patient data revealed transgenerational alterations in the transcriptional signature of human NAFLD-NASH in medaka liver. Twenty percent of differentially expressed genes (DEGs) were upregulated in both human NAFLD patients and medaka. Specifically in females, among the total shared DEGs in the liver of BPA lineage fish and NAFLD patient groups, 27.69% were downregulated, and 20% were upregulated. Of all DEGs, 52.31% of DEGs were found in ancestral BPA-lineage females, suggesting that NAFLD in females shared the majority of human NAFLD gene networks. Pathway analysis revealed beta-oxidation, lipoprotein metabolism, and HDL/LDL-mediated transport processes linked to downregulated DEGs in BPA lineage males and females. In contrast, the expression of genes encoding lipogenesis-related proteins was significantly elevated in the liver of BPA lineage females only. BPA lineage females exhibiting activation of myc, atf4, xbp1, stat4, and cancerous pathways, as well as inactivation of igf1, suggest their possible association with an advanced NAFLD phenotype. The present results suggest that gene networks involved in the progression of human NAFLD and the transgenerational NAFLD in medaka are conserved and that medaka can be an excellent animal model to understand the development and progression of liver disease and environmental influences in the liver.
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  • 文章类型: Journal Article
    血清前列腺特异性抗原(PSA),其衍生物,和磁共振断层扫描(MRI)缺乏足够的特异性和敏感性来预测主动监测(AS)的前列腺癌(PCa)患者的风险重新分类。我们调查了AS患者的尿细胞外囊泡(uEV)中的选定转录本,以预测对照活检中的PCa风险重新分类(由PSA>10ng/mL的ISUP1或任何PSA水平的ISUP2-5定义)。在对照活检之前,前瞻性地收集了72名患者的尿液样本,其中43%在AS期间被重新分类。从uEV中分离RNA后,多重逆转录,和预扩增,通过定量PCR对29个PCa相关转录物进行定量。通过计算曲线下面积(AUC),通过受试者工作特征(ROC)曲线分析评估转录物指示PCa风险重新分类的预测能力,然后与临床参数进行比较,然后进行多变量回归分析。ROC曲线分析揭示了AMACR的预测潜力,HPN,MALAT1、PCA3和PCAT29(AUC=0.614-0.655,p<0.1)。PSA,PSA密度,PSA速度,MRImaxPI-RADS显示AUC值为0.681-0.747(p<0.05),指示PCa风险重新分类的准确性为64-68%。包括AMACR的模型,MALAT1,PCAT29,PSA密度,MRImaxPI-RADS的AUC为0.867(p<0.001),特异性,准确率为87%,83%,85%,分别,从而超过了单个标记的预测能力。这些发现突出了uEV转录本与临床参数结合作为PCaAS期间监测标志物的潜力。
    Serum prostate-specific antigen (PSA), its derivatives, and magnetic resonance tomography (MRI) lack sufficient specificity and sensitivity for the prediction of risk reclassification of prostate cancer (PCa) patients on active surveillance (AS). We investigated selected transcripts in urinary extracellular vesicles (uEV) from PCa patients on AS to predict PCa risk reclassification (defined by ISUP 1 with PSA > 10 ng/mL or ISUP 2-5 with any PSA level) in control biopsy. Before the control biopsy, urine samples were prospectively collected from 72 patients, of whom 43% were reclassified during AS. Following RNA isolation from uEV, multiplexed reverse transcription, and pre-amplification, 29 PCa-associated transcripts were quantified by quantitative PCR. The predictive ability of the transcripts to indicate PCa risk reclassification was assessed by receiver operating characteristic (ROC) curve analyses via calculation of the area under the curve (AUC) and was then compared to clinical parameters followed by multivariate regression analysis. ROC curve analyses revealed a predictive potential for AMACR, HPN, MALAT1, PCA3, and PCAT29 (AUC = 0.614-0.655, p < 0.1). PSA, PSA density, PSA velocity, and MRI maxPI-RADS showed AUC values of 0.681-0.747 (p < 0.05), with accuracies for indicating a PCa risk reclassification of 64-68%. A model including AMACR, MALAT1, PCAT29, PSA density, and MRI maxPI-RADS resulted in an AUC of 0.867 (p < 0.001) with a sensitivity, specificity, and accuracy of 87%, 83%, and 85%, respectively, thus surpassing the predictive power of the individual markers. These findings highlight the potential of uEV transcripts in combination with clinical parameters as monitoring markers during the AS of PCa.
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  • 文章类型: Journal Article
    人乳头瘤病毒(HPV)阳性头颈部鳞状细胞癌(HNSCC)包括传统上与更好的临床结果相关的特定癌症实体。大约25%的HNSCC是HPV阳性。HPV16是最普遍的类型。然而,接近30%的HPV阳性患者预后不良,揭示了这种类型的肿瘤表现出巨大的异质性,导致不同的临床行为。已经努力鉴定与HPV阳性HNSCC患者的临床结果相关的具有预后价值的RNA分子。为了识别转移风险高的患者,疾病复发,可怜的生存,谁需要更密切的临床随访和及时干预。此外,那些具有良好预后的HPV阳性HNSCC患者的分子鉴定将允许实施降级治疗策略,旨在减少副作用,带来更好的生活质量。这篇综述汇编了一系列针对不同方法和概念方法的最新研究,旨在寻找与HPV阳性HNSCC患者预后相关的潜在基于基因表达的生物标志物。
    Human papillomavirus (HPV)-positive Head and Neck Squamous Cell Carcinomas (HNSCC) comprise a particular cancer entity traditionally associated with better clinical outcomes. Around 25% of HNSCC are HPV positive, HPV16 being the most prevalent type. Nevertheless, close to 30% of the HPV-positive patients have an unfavorable prognosis, revealing that this type of tumor exhibits great heterogeneity leading to different clinical behaviors. Efforts have been made to identify RNA molecules with prognostic value associated with the clinical outcome of patients with HPV-positive HNSCC, with the aim of identifying patients at high risk of metastasis, disease recurrence, and poor survival, who would require closer clinical follow-up and timely intervention. Moreover, the molecular identification of those HPV-positive HNSCC patients with good prognosis will allow the implementation of de-escalating therapeutic strategies, aiming to reduce side effects, resulting in a better quality of life. This review compiles a series of recent studies addressing different methodological and conceptual approaches aimed at searching for potential gene expression-based biomarkers associated with the prognosis of patients with HPV-positive HNSCC.
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  • 文章类型: Journal Article
    脂肪肝疾病进展为非酒精性脂肪性肝炎(NASH)是人类死亡的主要原因。生活方式和环境化学暴露会增加人类对NASH的易感性。在人类中,尿液中双酚A(BPA)的存在与脂肪肝疾病相关,但祖先BPA暴露是否导致未暴露后代中人类NAFLD-NASH相关基因的激活尚不清楚.在这项研究中,使用田高鱼作为人类NAFLD的动物模型,我们研究了人类NAFLD-NASH的转录特征及其在3代前未直接暴露但其祖先在胚胎和围产期发育期间暴露于BPA的鱼类肝脏发病机制中的相关作用.BPA谱系男性和女性medaka中肝脏的大量RNA-Seq数据与公开可用的人类NAFLD-NASH患者数据的比较揭示了medaka肝脏中人类NAFLD-NASH转录特征的跨代改变。在人类NAFLD患者和medaka中,20%的差异表达基因(DEGs)被上调。特别是在女性中,在BPA谱系鱼和NAFLD患者组的肝脏中,27.69%的DEG下调,20%的DEG上调。关闭所有DEG,在祖先的BPA谱系女性中发现了52.31%的DEG,这表明女性的NAFLD共享大多数人类NAFLD基因网络。路径分析显示β氧化,脂蛋白代谢,和HDL/LDL介导的转运过程与BPA谱系男性和女性中下调的DEG相关。相比之下,仅在BPA谱系雌性的肝脏中,编码脂肪生成相关蛋白的基因的表达显着升高。表现出myc激活的BPA谱系雌性,atf4,xbp1,stat4,和癌变途径,以及igf1的失活,提示其可能与晚期NAFLD表型相关。目前的结果表明,在medaka中参与人类NAFLD和跨代NAFLD进展的基因网络是保守的,并且medaka可以是了解肝脏疾病的发展和进展以及肝脏中的环境影响的极好的动物模型。
    The progression of fatty liver disease to non-alcoholic steatohepatitis (NASH) is a leading cause of death in humans. Lifestyles and environmental chemical exposures can increase the susceptibility of humans to NASH. In humans, the presence of bisphenol A (BPA) in urine is associated with fatty liver disease, but whether ancestral BPA exposure leads to the activation of human NAFLD-NASH-associated genes in the unexposed descendants is unclear. In this study, using medaka fish as an animal model for human NAFLD, we investigated the transcriptional signatures of human NAFLD-NASH and their associated roles in the pathogenesis of the liver of fish who were not directly exposed but their ancestors were exposed to BPA during embryonic and perinatal development three generations prior. Comparison of bulk RNA-Seq data of the liver in BPA lineage male and female medaka with publicly available human NAFLD-NASH patient data revealed transgenerational alterations in the transcriptional signature of human NAFLD-NASH in medaka liver. Twenty percent of differentially expressed genes (DEGs) were upregulated in both human NAFLD patients and medaka. Specifically in females, among the total shared DEGs in the liver of BPA lineage fish and NAFLD patient groups, 27.69% DEGs were downregulated and 20% DEGs were upregulated. Off all DEGs, 52.31% DEGs were found in ancestral BPA-lineage females, suggesting that NAFLD in females shared majority of human NAFLD gene networks. Pathway analysis revealed beta-oxidation, lipoprotein metabolism, and HDL/LDL-mediated transport processes linked to downregulated DEGs in BPA lineage males and females. In contrast, the expression of genes encoding lipogenesis-related proteins was significantly elevated in the liver of BPA lineage females only. BPA lineage females exhibiting activation of myc, atf4, xbp1, stat4, and cancerous pathways, as well as inactivation of igf1, suggest their possible association with an advanced NAFLD phenotype. The present results suggest that gene networks involved in the progression of human NAFLD and the transgenerational NAFLD in medaka are conserved and that medaka can be an excellent animal model to understand the development and progression of liver disease and environmental influences in the liver.
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  • 文章类型: Journal Article
    口腔癌(OC)是世界上最常见的恶性肿瘤之一。尽管治疗取得了进展,OC的最坏情况仍然是转移,有50%的存活率。因此,了解该病的病理生理学并制定OC的诊断和治疗计划至关重要。高通量基因组测序的发展表明,超过90%的人类基因组编码非编码转录本,或不编码任何蛋白质的转录本。本文描述了这些不同类型的非编码RNA(ncRNA)在OC中的功能以及它们有趣的治疗潜力。OC的产生和发展,以及治疗抗性,与ncRNA表达失调相关。这些ncRNAs在诊断和预后中的潜在重要作用已经通过它们在血液或唾液中的不同表达来提示。在这项研究中,我们概述了ncRNAs在治疗OC中的每一个有希望的特征。
    Oral cancer (OC) is among the most common malignancies in the world. Despite advances in therapy, the worst-case scenario for OC remains metastasis, with a 50% survival rate. Therefore, it is critical to comprehend the pathophysiology of the condition and to create diagnostic and treatment plans for OC. The development of high-throughput genome sequencing has revealed that over 90% of the human genome encodes non-coding transcripts, or transcripts that do not code for any proteins. This paper describes the function of these different kinds of non-coding RNAs (ncRNAs) in OC as well as their intriguing therapeutic potential. The onset and development of OC, as well as treatment resistance, are linked to dysregulated ncRNA expression. These ncRNAs\' potentially significant roles in diagnosis and prognosis have been suggested by their differing expression in blood or saliva. We have outlined every promising feature of ncRNAs in the treatment of OC in this study.
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  • 文章类型: Journal Article
    背景:医学文献在临床实践中起着至关重要的作用,促进准确的患者管理和卫生保健专业人员之间的沟通。然而,医疗笔记中的不准确会导致误解和诊断错误。此外,文件的要求有助于医生倦怠。尽管医疗抄写员和语音识别软件等中介已经被用来减轻这种负担,它们在准确性和解决特定于提供商的指标方面有局限性。环境人工智能(AI)支持的解决方案的集成提供了一种有希望的方式来改进文档,同时无缝地融入现有的工作流程。
    目的:本研究旨在评估主观,Objective,评估,和AI模型ChatGPT-4生成的计划(SOAP)注释,使用既定的历史和体格检查成绩单作为黄金标准。我们试图识别潜在的错误,并评估不同类别的模型性能。
    方法:我们进行了代表各种门诊专业的模拟患者-提供者相遇,并转录了音频文件。确定了关键的可报告元素,ChatGPT-4用于根据这些转录本生成SOAP注释。创建了每个注释的三个版本,并通过图表审查与黄金标准进行了比较;比较产生的错误被归类为遗漏,不正确的信息,或添加。我们比较了不同版本数据元素的准确性,转录本长度,和数据类别。此外,我们使用医师文档质量仪器(PDQI)评分系统评估笔记质量.
    结果:尽管ChatGPT-4始终生成SOAP风格的注释,有,平均而言,23.6每个临床病例的错误,遗漏错误(86%)是最常见的,其次是添加错误(10.5%)和包含不正确的事实(3.2%)。同一案例的重复之间存在显着差异,在所有3个重复中,只有52.9%的数据元素报告正确。数据元素的准确性因案例而异,在“目标”部分中观察到最高的准确性。因此,纸币质量的衡量标准,由PDQI评估,显示了病例内和病例间的差异。最后,ChatGPT-4的准确性与转录本长度(P=.05)和可评分数据元素的数量(P=.05)呈负相关。
    结论:我们的研究揭示了错误的实质性差异,准确度,和由ChatGPT-4产生的注释质量。错误不限于特定部分,和错误类型的不一致复制复杂的可预测性。成绩单长度和数据复杂度与音符准确度成反比,这引起了人们对该模式在处理复杂医疗案件中的有效性的担忧。ChatGPT-4产生的临床笔记的质量和可靠性不符合临床使用所需的标准。尽管AI在医疗保健领域充满希望,在广泛采用之前,应谨慎行事。需要进一步的研究来解决准确性问题,可变性,和潜在的错误。ChatGPT-4,虽然在各种应用中很有价值,目前不应该被认为是人类产生的临床文件的安全替代品。
    BACKGROUND: Medical documentation plays a crucial role in clinical practice, facilitating accurate patient management and communication among health care professionals. However, inaccuracies in medical notes can lead to miscommunication and diagnostic errors. Additionally, the demands of documentation contribute to physician burnout. Although intermediaries like medical scribes and speech recognition software have been used to ease this burden, they have limitations in terms of accuracy and addressing provider-specific metrics. The integration of ambient artificial intelligence (AI)-powered solutions offers a promising way to improve documentation while fitting seamlessly into existing workflows.
    OBJECTIVE: This study aims to assess the accuracy and quality of Subjective, Objective, Assessment, and Plan (SOAP) notes generated by ChatGPT-4, an AI model, using established transcripts of History and Physical Examination as the gold standard. We seek to identify potential errors and evaluate the model\'s performance across different categories.
    METHODS: We conducted simulated patient-provider encounters representing various ambulatory specialties and transcribed the audio files. Key reportable elements were identified, and ChatGPT-4 was used to generate SOAP notes based on these transcripts. Three versions of each note were created and compared to the gold standard via chart review; errors generated from the comparison were categorized as omissions, incorrect information, or additions. We compared the accuracy of data elements across versions, transcript length, and data categories. Additionally, we assessed note quality using the Physician Documentation Quality Instrument (PDQI) scoring system.
    RESULTS: Although ChatGPT-4 consistently generated SOAP-style notes, there were, on average, 23.6 errors per clinical case, with errors of omission (86%) being the most common, followed by addition errors (10.5%) and inclusion of incorrect facts (3.2%). There was significant variance between replicates of the same case, with only 52.9% of data elements reported correctly across all 3 replicates. The accuracy of data elements varied across cases, with the highest accuracy observed in the \"Objective\" section. Consequently, the measure of note quality, assessed by PDQI, demonstrated intra- and intercase variance. Finally, the accuracy of ChatGPT-4 was inversely correlated to both the transcript length (P=.05) and the number of scorable data elements (P=.05).
    CONCLUSIONS: Our study reveals substantial variability in errors, accuracy, and note quality generated by ChatGPT-4. Errors were not limited to specific sections, and the inconsistency in error types across replicates complicated predictability. Transcript length and data complexity were inversely correlated with note accuracy, raising concerns about the model\'s effectiveness in handling complex medical cases. The quality and reliability of clinical notes produced by ChatGPT-4 do not meet the standards required for clinical use. Although AI holds promise in health care, caution should be exercised before widespread adoption. Further research is needed to address accuracy, variability, and potential errors. ChatGPT-4, while valuable in various applications, should not be considered a safe alternative to human-generated clinical documentation at this time.
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  • 文章类型: Journal Article
    本研究旨在研究两种水稻基因型(Noichi和N22)在干旱下的生理生化和分子反应。热和联合干旱/热胁迫条件。在复合胁迫条件下发现了拮抗气孔活动;气孔在控制和热胁迫下开放,相反,在干旱和综合胁迫水平下,气孔保持关闭。在两种水稻基因型中,活性氧的过量产生和脂质过氧化的增加都会降低光合活性和叶绿素含量。为了防止氧化损伤,许多抗氧化酶,如过氧化氢酶(CAT),在这些条件下,两种基因型都会产生抗坏血酸过氧化物酶(APX)和超氧化物歧化酶(SOD)。在单一应力条件下,CAT活性在N22中增加,而联合应激水平,两种基因型的SOD和APX活性均较高。在两种基因型的单一和组合应激条件下,脯氨酸的积累也增加了,以对抗应激损伤。花粉活力在所有胁迫水平下丧失,但在联合胁迫水平下发现严重丧失,这导致小穗不育,导致两种基因型的产量损失。从成绩单水平可以明显看出,HSP71.18和HSP71.10在单一和联合条件下表达较高,但HSP72.57基因表达仅在个体胁迫水平上增加。WRKY11,WRKY55,DREB2A,LEA3和DHN1在所有应激水平下均呈阳性表达。相反,DREB2B基因的表达仅在单一应激水平下才较高。总之,这些结果表明,联合应力的影响不同于单一应力,并且比单个应力更严重。
    在线版本包含补充材料,可在10.1007/s13205-024-03980-1获得。
    The present study was carried out to investigate the physio-biochemical and molecular responses of two rice genotypes (Noichi and N22) under drought, heat and combined drought/heat stress conditions. The antagonistic stomatal activity was found under the combined stress conditions; stomata were open under control and heat stress, conversely, stomata remained closed under drought and combined stress levels. Photosynthetic activity and chlorophyll content are decreased by the overproduction of reactive oxygen species and increased lipid peroxidation in both rice genotypes. To prevent oxidative damage, many antioxidant enzymes like catalase (CAT), ascorbate peroxidase (APX) and superoxide dismutase (SOD) are produced in both genotypes under these conditions. Under the single stress conditions, CAT activity were increased in N22, whereas combined stress levels, SOD and APX activity were higher for both genotypes. Proline accumulation was also increased under single as well as combined stress conditions for both genotypes to combat stress injuries. Pollen viability was lost under all stress levels but severe loss was found under combined stress levels, which causes spikelet sterility leading to yield losses for both genotypes. As evident from transcript levels, HSP71.18 and HSP71.10 expressions were higher under single and combined conditions, butHSP72.57 gene expression increased only by individual stress levels. WRKY11, WRKY 55, DREB 2A, LEA3 and DHN1 were positively expressed under all stress levels. Conversely, expression of DREB2B genes was higher only under single stress levels. In summary, these results suggest that the effect of combined stress is different from the single stress and it is more severe than the individual stress.
    UNASSIGNED: The online version contains supplementary material available at 10.1007/s13205-024-03980-1.
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  • 文章类型: Journal Article
    基因检测,包括整个基因组,整个exome,和其他下一代测序技术,在过去的十年里发生了巨大的变化。有了这个,已识别的基因和遗传变异的数量不断增加。尽管存在各种数据库和在线工具,归类,并对基因进行分类,报告基因时需要哪些信息以及识别新基因时需要做什么的明确指南是缺乏的。这包括正确的命名法,有关遗传基因座和遗传变异的描述性信息,别名,和相关表型。本教程旨在作为论文中报告基因的介绍,并提供可用数据库和工具的概述,以获取有关感兴趣基因的所有必要信息。
    Genetic testing, including whole genome, whole exome, and other next-generation sequencing technologies, has evolved vastly in the past decade. With this, the number of identified genes and genetic variants is constantly increasing. Although a variety of databases and online tools exist that summarize, categorize, and classify genes, a clear guideline of which information is needed when reporting a gene and what to do when identifying a new gene is lacking. This includes the correct nomenclature, descriptive information about genetic loci and genetic variation, aliases, and correlated phenotypes. This tutorial is meant to serve as an introduction to reporting genes in a paper and provides an overview of available databases and tools to obtain all necessary information on the genes of interest.
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  • 文章类型: Journal Article
    细菌感染对人类健康构成重大风险。厚朴酚,来源于厚朴,表现出有效的抗菌性能。合成生物学提供了一种有希望的方法来制造这种天然化合物。然而,厚朴酚的植物生物合成仍然不清楚,缺乏关键基因的鉴定阻碍了其合成生产。在这项研究中,我们已经提出了使用漆酶从chavicol中一步转化厚朴酚。在利用了20个来自多药不同部位的转录组之后,组装了成绩单,丰富的基因组注释。在将这个数据集与当前的基因组信息整合后,我们可以鉴定出30种漆酶.从与厚朴酚生产相关的两个潜在基因簇中,对高表达基因进行功能分析。体外实验证实MoLAC14是木兰酚合成中的关键酶。通过选择性突变实现了MoLAC14热稳定性的改善,其中E345P,G377P,H347F,E346C,和E346F显著增强了稳定性。通过进行丙氨酸扫描,确定了MoLAC14中的必需残基,L532A突变进一步将厚朴酚的生产提高到148.83mg/L的前所未有的水平。我们的发现不仅阐明了chavicol转化为厚朴酚的关键酶,也为合成生物学驱动的厚朴酚生产奠定了基础,从而提供了有价值的见解M.officinalis生物学和比较植物科学。
    Bacterial infections pose a significant risk to human health. Magnolol, derived from Magnolia officinalis, exhibits potent antibacterial properties. Synthetic biology offers a promising approach to manufacture such natural compounds. However, the plant-based biosynthesis of magnolol remains obscure, and the lack of identification of critical genes hampers its synthetic production. In this study, we have proposed a one-step conversion of magnolol from chavicol using laccase. After leveraging 20 transcriptomes from diverse parts of M. officinalis, transcripts were assembled, enriching genome annotation. Upon integrating this dataset with current genomic information, we could identify 30 laccase enzymes. From two potential gene clusters associated with magnolol production, highly expressed genes were subjected to functional analysis. In vitro experiments confirmed MoLAC14 as a pivotal enzyme in magnolol synthesis. Improvements in the thermal stability of MoLAC14 were achieved through selective mutations, where E345P, G377P, H347F, E346C, and E346F notably enhanced stability. By conducting alanine scanning, the essential residues in MoLAC14 were identified, and the L532A mutation further boosted magnolol production to an unprecedented level of 148.83 mg/L. Our findings not only elucidated the key enzymes for chavicol to magnolol conversion, but also laid the groundwork for synthetic biology-driven magnolol production, thereby providing valuable insights into M. officinalis biology and comparative plant science.
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  • 文章类型: Journal Article
    背景:花生过敏的反应阈值是高度可变的。阐明与可变阈值相关的分子和细胞过程之间的因果关系可能指向提高阈值的治疗途径。
    目的:表征与花生过敏反应阈值相关的分子和细胞系统过程以及它们之间的因果关系。
    方法:105名4至14岁疑似花生过敏的儿童接受双盲治疗,安慰剂对照食品对花生的挑战。导致过敏症状的花生蛋白累积量被认为是每个孩子的反应阈值。在攻击开始后0、2和4小时收集的外周血样品用于RNA测序,全血染色,和细胞计数。进行了统计和网络分析,以确定分子和细胞谱与花生反应阈值之间的关联和因果介导。
    结果:在队列中(n=105),81(77%)在摄入不同数量的花生后出现过敏反应,范围从43到9043毫克累积花生蛋白。外周血转录物的表达(例如,IGF1R,FDR=5.4e-5和PADI4,FDR=5.4e-5)和中性粒细胞丰度(FDR=9.5e-4)与花生阈值相关。共表达网络分析显示,阈值相关转录本在FcγR介导的吞噬作用(FDR=3.2e-3)和TLR(FDR=1.4e-3)信号传导模块中富集。贝叶斯网络,密钥驱动程序,和因果中介分析确定了关键驱动因素(AP5B1、KLHL21、VASP、TPD52L2和IGF2R)在这些模块中涉及与中性粒细胞丰度的双向因果调解关系。
    结论:FcγR介导的吞噬作用和TLR信号的关键驱动转录与外周血中性粒细胞双向相互作用,并与花生变态反应阈值相关。
    BACKGROUND: Reaction thresholds in peanut allergy are highly variable. Elucidating causal relationships between molecular and cellular processes associated with variable thresholds could point to therapeutic pathways for raising thresholds.
    OBJECTIVE: The aim of this study was to characterize molecular and cellular systemic processes associated with reaction threshold in peanut allergy and causal relationships between them.
    METHODS: A total of 105 children aged 4 to 14 years with suspected peanut allergy underwent double-blind, placebo-controlled food challenge to peanut. The cumulative peanut protein quantity eliciting allergic symptoms was considered the reaction threshold for each child. Peripheral blood samples collected at 0, 2, and 4 hours after challenge start were used for RNA sequencing, whole blood staining, and cytometry. Statistical and network analyses were performed to identify associations and causal mediation between the molecular and cellular profiles and peanut reaction threshold.
    RESULTS: Within the cohort (N = 105), 81 children (77%) experienced allergic reactions after ingesting varying quantities of peanut, ranging from 43 to 9043 mg of cumulative peanut protein. Peripheral blood expression of transcripts (eg, IGF1R [false discovery rate (FDR) = 5.4e-5] and PADI4 [FDR = 5.4e-5]) and neutrophil abundance (FDR = 9.5e-4) were associated with peanut threshold. Coexpression network analyses revealed that the threshold-associated transcripts were enriched in modules for FcγR-mediated phagocytosis (FDR = 3.2e-3) and Toll-like receptor (FDR = 1.4e-3) signaling. Bayesian network, key driver, and causal mediation analyses identified key drivers (AP5B1, KLHL21, VASP, TPD52L2, and IGF2R) within these modules that are involved in bidirectional causal mediation relationships with neutrophil abundance.
    CONCLUSIONS: Key driver transcripts in FcγR-mediated phagocytosis and Toll-like receptor signaling interact bidirectionally with neutrophils in peripheral blood and are associated with reaction threshold in peanut allergy.
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