genetic biomarkers

遗传生物标志物
  • 文章类型: Journal Article
    自闭症谱系障碍是一种复杂的神经发育状况,具有多种遗传和大脑参与。尽管磁共振成像取得了进步,自闭症谱系障碍的诊断和了解其神经遗传因素仍然具有挑战性。我们提出了一种双分支图神经网络,可以有效地从双峰中提取和融合特征,达到73.9%的诊断准确率。为了解释自闭症谱系障碍与健康对照的区别机制,我们建立了脑成像标志物的扰动模型,并使用偏最小二乘回归和富集进行神经转录组联合分析,以鉴定潜在的遗传标志物.扰动模型识别与额叶结构磁共振成像相关的脑成像标记,temporal,顶叶,和枕叶,虽然功能性磁共振成像标记主要位于额叶,temporal,枕叶,还有小脑.神经转录组联合分析突出了与生物过程相关的基因,比如“突触”,\"\"行为,自闭症谱系障碍大脑发育中的“化学突触传递的调节”。不同的磁共振成像模式为自闭症谱系障碍的诊断提供了补充信息。我们的双分支图神经网络具有很高的准确性,可以识别异常的大脑区域,并且神经转录组学分析揭示了重要的遗传生物标志物。总的来说,我们的研究提出了一种有效的方法来协助自闭症谱系障碍的诊断和识别遗传生物标志物,显示出增强这种情况的诊断和治疗的潜力。
    Autism spectrum disorder is a complex neurodevelopmental condition with diverse genetic and brain involvement. Despite magnetic resonance imaging advances, autism spectrum disorder diagnosis and understanding its neurogenetic factors remain challenging. We propose a dual-branch graph neural network that effectively extracts and fuses features from bimodalities, achieving 73.9% diagnostic accuracy. To explain the mechanism distinguishing autism spectrum disorder from healthy controls, we establish a perturbation model for brain imaging markers and perform a neuro-transcriptomic joint analysis using partial least squares regression and enrichment to identify potential genetic biomarkers. The perturbation model identifies brain imaging markers related to structural magnetic resonance imaging in the frontal, temporal, parietal, and occipital lobes, while functional magnetic resonance imaging markers primarily reside in the frontal, temporal, occipital lobes, and cerebellum. The neuro-transcriptomic joint analysis highlights genes associated with biological processes, such as \"presynapse,\" \"behavior,\" and \"modulation of chemical synaptic transmission\" in autism spectrum disorder\'s brain development. Different magnetic resonance imaging modalities offer complementary information for autism spectrum disorder diagnosis. Our dual-branch graph neural network achieves high accuracy and identifies abnormal brain regions and the neuro-transcriptomic analysis uncovers important genetic biomarkers. Overall, our study presents an effective approach for assisting in autism spectrum disorder diagnosis and identifying genetic biomarkers, showing potential for enhancing the diagnosis and treatment of this condition.
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  • 文章类型: Journal Article
    UNASSIGNED:阿尔茨海默病(AD)是一种进行性神经退行性疾病,可导致认知障碍和记忆力减退。目前,AD的发病机制和潜在致病基因仍不清楚,这种疾病没有有效的治疗方法。本研究通过分析来自NCBI基因表达综合数据库的公开数据,从免疫浸润的角度探索AD相关的诊断和治疗生物标志物。
    未经批准:在这项研究中,进行了加权基因共表达网络分析(WGCNA),以鉴定有助于AD发生的模块和中枢基因.当模块中的基因被富集并通过基因本体论(GO)/京都基因和基因组百科全书(KEGG)分析进行检查时,构建了蛋白质-蛋白质相互作用网络。此外,使用拓扑WGCNA建立了一个基因网络,从中选择了五个hub基因。采用Logistic回归分析和受试者工作特征曲线分析探讨基因在AD诊断中的临床价值。核心模块中的基因与集线器基因相交,和四个交叉基因(ATP2A2,ATP6V1D,选择CAP2和SYNJ1)。通过基因集富集分析(GSEA)富集这四个基因。最后,进行了免疫浸润分析。
    UNASSIGNED:GO/KEGG分析表明,核心模块中的基因在神经细胞的分化和生长以及神经递质的传递中起作用。核心基因的GSEA显示,这四个基因主要富集在免疫/感染途径中(例如,霍乱感染和幽门螺杆菌感染途径)和其他代谢途径。对免疫浸润特性的研究表明,激活的肥大细胞,调节性T细胞,浆细胞,中性粒细胞,滤泡辅助性T细胞,CD8T细胞,静息记忆CD4T细胞,M1巨噬细胞是导致AD进展的核心免疫细胞。qRT-PCR分析显示ATP6V1D在AD中上调。
    UNASSIGNED:富集和免疫渗透分析结果表明,免疫途径和免疫细胞在AD的发生和发展中起重要作用。筛选出的关键基因作为与AD发病相关的生物标志物,进一步探索其通路和细胞,这为AD的治疗靶点提供了新的视角。
    UNASSIGNED: Alzheimer\'s disease (AD) is a progressive neurodegenerative disease that leads to cognitive impairment and memory loss. Currently, the pathogenesis and underlying causative genes of AD remain unclear, and there exists no effective treatment for this disease. This study explored AD-related diagnostic and therapeutic biomarkers from the perspective of immune infiltration by analyzing public data from the NCBI Gene Expression Omnibus database.
    UNASSIGNED: In this study, weighted gene co-expression network analysis (WGCNA) was conducted to identify modules and hub genes contributing to AD development. A protein-protein interaction network was constructed when the genes in the modules were enriched and examined by Gene Ontology (GO)/Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. Furthermore, a gene network was established using topological WGCNA, from which five hub genes were selected. Logistic regression analysis and receiver operating characteristic curve analysis were performed to explore the clinical value of genes in AD diagnosis. The genes in the core module intersected with the hub genes, and four intersection genes (ATP2A2, ATP6V1D, CAP2, and SYNJ1) were selected. These four genes were enriched by gene set enrichment analysis (GSEA). Finally, an immune infiltration analysis was performed.
    UNASSIGNED: The GO/KEGG analysis suggested that genes in the core module played a role in the differentiation and growth of neural cells and in the transmission of neurotransmitters. The GSEA of core genes showed that these four genes were mainly enriched in immune/infection pathways (e.g., cholera infection and Helicobacter pylori infection pathways) and other metabolic pathways. An investigation of immune infiltration characteristics revealed that activated mast cells, regulatory T cells, plasma cells, neutrophils, T follicular helper cells, CD8 T cells, resting memory CD4 T cells, and M1 macrophages were the core immune cells contributing to AD progression. qRT-PCR analysis showed that the ATP6V1D is upregulated in AD.
    UNASSIGNED: The results of enrichment and immuno-osmotic analyses indicated that immune pathways and immune cells played an important role in the occurrence and development of AD. The selected key genes were used as biomarkers related to the pathogenesis of AD to further explore the pathways and cells, which provided new perspectives on therapeutic targets in AD.
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  • 文章类型: Journal Article
    由于影响抗肿瘤免疫反应的复杂机制,单一的生物标志物不足以识别将受益于免疫检查点抑制剂(ICIs)治疗的患者.因此,迫切需要一个全面的预测模型来预测对ICI的反应。来自三个独立队列的接受ICIs治疗的162例非小细胞肺癌(NSCLC)患者被纳入并用作训练和测试队列(训练队列=69,测试队列t1=72,测试队列t2=21)。为每个患者提取或计算八个基因组标记。十个机器学习分类器,如高斯过程分类器,随机森林,和支持向量机(SVM),进行了评估。三种基因组生物标志物,即肿瘤突变负担,肿瘤内异质性,筛选出人类白细胞抗原杂合性缺失,并采用SVM_poly方法构建持久临床获益(DCB)预测模型。与单个生物标志物相比,DCB多特征模型表现出更好的预测价值,测试队列t1和队列t2的曲线下面积值分别等于0.77和0.78.预测患有DCB的患者显示出比预测具有非持久临床益处的患者改善的中位无进展生存期(mPFS)和中位总生存期(mOS)。
    Due to the complex mechanisms affecting anti-tumor immune response, a single biomarker is insufficient to identify patients who will benefit from immune checkpoint inhibitors (ICIs) treatment. Therefore, a comprehensive predictive model is urgently required to predict the response to ICIs. A total of 162 non-small-cell lung cancer (NSCLC) patients undergoing ICIs treatment from three independent cohorts were enrolled and used as training and test cohorts (training cohort = 69, test cohort1 = 72, test cohort2 = 21). Eight genomic markers were extracted or calculated for each patient. Ten machine learning classifiers, such as the gaussian process classifier, random forest, and support vector machine (SVM), were evaluated. Three genomic biomarkers, namely tumor mutation burden, intratumoral heterogeneity, and loss of heterozygosity in human leukocyte antigen were screened out, and the SVM_poly method was adopted to construct a durable clinical benefit (DCB) prediction model. Compared with a single biomarker, the DCB multi-feature model exhibits better predictive value with the area under the curve values equal to 0.77 and 0.78 for test cohort1 and cohort2, respectively. The patients predicted to have DCB showed improved median progression-free survival (mPFS) and median overall survival (mOS) than those predicted to have non-durable clinical benefit.
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  • 文章类型: Journal Article
    心力衰竭(HF)患者通常表现为非特异性和广泛的鉴别诊断的体征和症状。仅通过临床表现对HF的诊断和预后具有挑战性。随着高通量DNA测序技术的发展,我们对遗传多样性的认识正在迅速发展。这对遗传生物标志物的开发具有巨大的潜力。本综述试图对HF患者主要遗传成分的修饰进行全面综述,并探讨这些成分作为临床生物标志物在HF诊断和监测进展中的潜在应用。使用六个数据库进行文献检索,结果在审查中纳入了18项研究。对这些研究结果进行了叙述性总结。使用根据加强流行病学观察研究报告(STROBE)清单改编的12项清单对纳入研究的报告质量进行评估。结果表明,与健康对照相比,HF患者的遗传成分变化可能是HF的非侵入性诊断或预后工具,与传统生物标志物相比具有更高的特异性和敏感性。这篇综述为开发HF遗传生物标志物的潜力提供了证据。
    Patients with heart failure (HF) often present with signs and symptoms that are often nonspecific and with a wide differential diagnosis, making diagnosis and prognosis of HF by clinical presentation alone challenging. Our knowledge on genetic diversity is rapidly evolving with high-throughput DNA sequencing technology, which makes a great potential for genetic biomarker development. The present review attempts to provide a comprehensive review on the modification of major genetic components in HF patients and to explore the potential application of these components as clinical biomarkers in the diagnosis and in monitoring the progress of HF. The literature search was conducted using six databases, resulting in the inclusion of eighteen studies in the review. The findings of these studies were summarized narratively. An appraisal of the reporting quality of the included studies was conducted using a twelve-item checklist adapted from the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist. The findings showed that changes in genetic components in patients with HF compared to healthy controls could be noninvasive diagnostic or prognostic tools for HF with higher specificity and sensitivity in comparison with the traditional biomarkers. This review provided evidence for the potential of developing genetic biomarkers of HF.
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  • 文章类型: Journal Article
    Inguinal hernia often occurs in elderly men, and more than one in five men will undergo inguinal hernia repair during their lifetime. Nevertheless, the underlying molecular mechanisms of the pathogenesis behind hernia formation is still unclear. The aims in this study are finding out the potential gene markers and available drugs.
    Firstly, we re-analyzed the GSE92748 datasets, including four high and four low expressions of humanized aromatase transgenic mice, which refers to mimic humanized hernia, to identify differentially expressed genes (DEGs) in AromhumH group compared with AromhumL group by the criteria: fold change ≥ 1.4 and adjust P value < 0.05. Secondly, the gene ontology and signaling pathway enrichment analyses of these DEGs were performed through online databases. In addition to the protein and protein interaction networks among these DEGs were constructed and the significant gene modules were chosen for further gene-drug interaction analysis. Lastly, the existing drugs target to these module genes were screen to explore the therapeutic effect for treatment of hernia.
    We have identified 64 DEGs, which were associated with muscle system process, actomyosin structure organization etc. Moreover, the significant module genes in PPI networks were Cmya1, Casq2, Cmya5, Ttn, Csrp3 and Actc1, and one existing drug, DEXAMETHASONE, have targeted to Actc1 gene.
    In the paper, we identified 6 potential genes and one existing drug for inguinal hernia, which might be used as targets and drugs for the study of inguinal hernia.
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  • 文章类型: Journal Article
    Robust, reliable, and sensitively quantitative detection of genetic biomarkers at single-base resolution has the potential to revolutionize medical diagnostics, especially for precision medicine. Here, taking the advantages of the high specificity of ligase reaction and the powerful amplification features of the isothermally exponential amplification, we have demonstrated a novel methodology to sensitively quantify genetic biomarkers at one-base resolution. The methodology is based on the ligase reaction of two stem-loop DNA probes templated by the nucleic acid targets to form a double stem-loop DNA, which subsequently initiates the isothermally exponential amplification reaction with high amplification efficiency. With the proposed method, high sensitivity to determine as low as 0.01 fM DNA or 0.1 fM RNA targets and high specificity to detect single-base changes can be achieved. The new methodology is robust to be performed by using a pair of universal primers under isothermal conditions, which should be employed to quantitatively detect any genetic biomarkers because all DNA/RNA targets can be directly used as the templates to ligate the stem-loop DNA probes with single-base resolution.
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  • 文章类型: Journal Article
    作为表现出高度异质性的最致命的癌症之一,肝细胞癌(HCC)与各种驱动基因所支持的多种致癌途径有关。肝癌可以由不同的病因,包括病毒感染,毒素暴露或代谢紊乱。因此,患者可能表现出不同的遗传特征,并且可能对涉及靶途径抑制的治疗有不同的反应。这些DNA/RNA突变,拷贝数变化,染色质结构变化,非编码RNA的异常表达和表观遗传修饰被认为是精准用药应用中的生物标志物.为了探索基因检测如何有助于早期诊断,预后,肝癌的治疗和术后监测,我们对与不同病理相关的遗传标记进行了系统评价.此外,我们总结了正在进行的肝癌治疗的临床试验,包括多种激酶抑制剂和免疫检查点阻断(ICB)的试验。ICB治疗肝癌的疗效不如观察到的肺癌和黑色素瘤,这可能是由于肝脏微环境的异质性。
    Being one of the most lethal cancers that exhibit high levels of heterogeneity, hepatocellular carcinoma (HCC) is associated with diverse oncogenic pathways underpinned by varied driver genes. HCC can be induced by different etiological factors including virus infection, toxin exposure or metabolic disorders. Consequently, patients may display varied genetic profiles, and may respond differently to the treatments involving inhibition of target pathways. These DNA/RNA mutations, copy number variations, chromatin structural changes, aberrant expression of non-coding RNAs and epigenetic modifications were considered as biomarkers in the application of precision medication. To explore how genetic testing could contribute to early diagnosis, prognosis, treatment and postoperative monitoring of HCC, we conducted a systematic review of genetic markers associated with different pathologies. Moreover, we summarized on-going clinical trials for HCC treatment, including the trials for multiple kinase inhibitors and immune checkpoint blockade (ICB). The efficacy of ICB treatment in HCC is not as good as what was observed in lung cancer and melanoma, which might be due to the heterogeneity of the microenvironment of the liver.
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  • 文章类型: Journal Article
    Although sulfadiazine (SDZ) is widespread in aquatic environments, information regarding the effects of SDZ on aquatic insects is still limited. In the present study, the bioconcentration and the effects of SDZ on the antioxidant system and the expression of endocrine and stress-related genes in Chironomus riparius larvae were investigated. The larvae were exposed to SDZ at the nominal concentrations of 2, 20 and 200 μg/L for 48 h. The results showed that SDZ was taken up by C. riparius despite presenting low bioconcentration factor values (0.99-3.92). In addition, superoxide dismutase activity was markedly reduced compared with the control group, whereas the levels of malondialdehyde were not significantly affected by SDZ. Moreover, the mRNA expression of genes related to heat shock proteins (Hsp70 and Hsp27) and ecdysone pathway (EcR and E74) were significantly up-regulated following all SDZ treatments. In aggregate, our work provides novel and interesting results regarding the potential biochemical and genetic effects of SDZ on freshwater insects.
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  • 文章类型: Journal Article
    Coronary artery disease (CAD) is a significant contributor to global health burden. Adiponectin gene single nucleotide polymorphisms (SNPs) have been associated with CAD susceptibility, but with inconsistent results across the studies. We present, in this study, an updated meta-analysis to discern the genetic susceptibility of adiponectin SNPs in relation to CAD. PubMed and EMBASE databases were used to identify the relevant published articles using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Pooled odds ratios and 95% confidence intervals were generated to assess the strength of the associations. Thirty-five articles with a total of 28,947 participants (mean age 55.3 years, 11,632 cases/17,315 controls, 19,443 males/8353 females, and 1151 persons with unspecified gender data) were included. The dominant, recessive, and additive models were applied. We found that the SNPs +45T>G (rs2241766), -4034A>C (rs822395), and -11391G>A (rs17300539) were linked to CAD development. In addition, +276G>T (rs1501299) SNP was associated with a decreased susceptibility to CAD among Caucasians. We did not find an association between the CAD susceptibility and the -11377C>G (rs266729) SNP. These observations offer new potential genetic biomarker candidates in relation to CAD, and warrant further research in independent world populations.
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  • 文章类型: Journal Article
    Currently, there is a pressing need to shift the focus to accurate detection of the earliest phase of increasingly preclinical Alzheimer\'s disease (AD). Meanwhile, the growing recognition that the pathophysiological process of AD begins many years prior to clinically obvious symptoms and the concept of a presymptomatic or preclinical stage of AD are becoming more widely accepted. Advances in clinical identification of new measurements will be critical not only in the discovery of sensitive, specific, and reliable biomarkers of preclinical AD but also in the development of tests that will aid in the early detection and differential diagnosis of dementia and in monitoring disease progression. The goal of this review is to provide an overview of biomarkers for preclinical AD, with emphasis on neuroimaging and neurochemical biomarkers. We conclude with a discussion of emergent directions for AD biomarker research.
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