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Identification of Key Gene Modules and Hub Genes of Hypertension Based on WGCNA Algorithm 基于WGCNA算法的高血压关键基因模块和枢纽基因鉴定
Zongjin Li, Changxin Song, Zeyu Jia, Dong Chen, Yan Liang
Background: Hypertension is a chronic disease with high morbidity and high mortality in the world. Its pathogenesis is complicated and its molecular mechanism has not been fully elucidated, which seriously threatens human life and health. The purpose of this paper was to the molecular study of hypertension, explore candidate biomarkers affecting the occurrence of hypertension from the perspective of weighted network, and provide the theoretical and practical basis for the prevention and treatment of hypertension. Materials and methods: The hypertension gene expression dataset of GSE75360 were downloaded from the Gene Expression Omnibus (GEO). The “limma” package of R was utilized to screen the differentially expressed genes (DEGs) between the sample group with and without high blood pressure. Next, Weight Gene co-expression Network Analysis (WGCNA) algorithm was used to establish a co-expression network of the DEGs and to detect hypertension-related gene modules. And DAVID was utilized to perform Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG). Finally, we proposed the hierarchical fusion method to screen hub genes. Results: We identified 2 key gene modules that were significantly associated with hypertension, named Mlightcyan and Mgreenyellow. In addition, 18 hub genes (RPS28, LOC730288/RPS28P6, LOC645968/ RPS3AP25, LOC727826/RPS11P5, RPL21, LOC653079/ RPL36P14, LOC441743/RPL23AP5, LOC651453/RPL36P14, LPPR2, NSMCE4A, FKBP1A, RAB5C, MAN2B1, FURIN, TBXAS1, RPS6KA4, PARN, LOC642489/FKBP1C) relating to hypertension were identified form the two key gene modules. Conclusions: In this study, we identified two key gene modules and 18 hub genes, which were associated with the mechanisms of hypertension. These findings will provide references that improve the understanding of the pathogenesis of hypertension. The hub genes might can serve as therapeutic targets for diagnosis of hypertension in the future.
背景:高血压是世界范围内发病率高、死亡率高的慢性疾病。其发病机制复杂,分子机制尚未完全阐明,严重威胁着人类的生命和健康。本文旨在对高血压进行分子研究,从加权网络的角度探索影响高血压发生的候选生物标志物,为高血压的防治提供理论和实践依据。材料和方法:从gene expression Omnibus (GEO)下载GSE75360高血压基因表达数据集。利用R的“limma”包筛选高血压组和非高血压组之间的差异表达基因(DEGs)。接下来,采用体重基因共表达网络分析(Weight Gene co-expression Network Analysis, WGCNA)算法建立deg共表达网络,检测高血压相关基因模块。使用DAVID进行基因本体(GO)富集分析和京都基因与基因组百科全书(KEGG)。最后,我们提出了分层融合筛选枢纽基因的方法。结果:我们发现了2个与高血压显著相关的关键基因模块,分别为Mlightcyan和Mgreenyellow。此外,从两个关键基因模块中鉴定出18个与高血压相关的枢纽基因(RPS28、LOC730288/RPS28P6、LOC645968/ RPS3AP25、LOC727826/RPS11P5、RPL21、LOC653079/ RPL36P14、LOC441743/RPL23AP5、LOC651453/RPL36P14、LPPR2、NSMCE4A、FKBP1A、RAB5C、MAN2B1、FURIN、TBXAS1、RPS6KA4、PARN、LOC642489/FKBP1C)。结论:在本研究中,我们发现了与高血压发病机制相关的2个关键基因模块和18个枢纽基因。这些发现将为进一步了解高血压的发病机制提供参考。枢纽基因可能成为未来高血压诊断的治疗靶点。
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引用次数: 0
Research on Technical Standards of Prevention and Control of Low Vision among Adolescents 青少年低视力防治技术标准研究
Wei Pan
This paper focuses on adolescents with low vision and indicates that prevention and treatment of adolescents with low vision through standardization methods is urgently needed. By investigating relevant standards and information released through professional organizations such as the International Organization for Standardization (ISO) , the American Optometry Association (AOA), the American Academy of Ophthalmology (AAO), and the International Commission on Illumination (ICI), combined with current status of development of relevant Chinese national standards, sector standards and local standards, the problems of technical standards in development status quo of prevention and control related to adolescents with low vision has been raised in this article. Three aspects can be improved include lacking of environmental standards, the scope of product standards need to be expanded and the Traditional Chinese Medicine standards need to be developed for better prevention and control of low vision among adolescents. It has been pointed out that a standard system with clear goals, complete sets, appropriate levels and clear divisions continuous optimizing and adjusting following social, economic and technical development needs to be established and it can play an important role in promoting the prevention and control of adolescents with low vision.
本文以青少年低视力为研究对象,指出通过标准化方法对青少年低视力进行预防和治疗是迫切需要的。通过对国际标准化组织(ISO)、美国视光协会(AOA)、美国眼科学会(AAO)、国际照明委员会(ICI)等专业机构发布的相关标准和信息的调研,结合我国相关国家标准、行业标准和地方标准的制定现状,提出了技术标准在青少年低视力防治发展现状中存在的问题。环境标准缺失、产品标准范围有待扩大、中药标准有待完善,以更好地预防和控制青少年低视力。指出需要建立目标明确、配套齐全、层次适宜、划分明确的标准体系,随着社会、经济和技术的发展不断优化调整,才能在促进青少年低视力防治中发挥重要作用。
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引用次数: 0
Identifying Enhancers and Their Strength Based on PCWM Feature by A Two-Layer Predictor 基于PCWM特征的两层预测器识别增强子及其强度
Huan Yang, Shunfang Wang
Enhancers are a small region of DNA that can bind with protein. After binding with protein, gene transcription will be strengthened. It is time-consuming and expensive to identify enhancers using traditional biological experimental methods. However, with the development of computer technology, more and more computer technology is applied to gene identification. There are two innovations in this study. First, a new feature information PCWM is proposed, which combines the normalized frequency information of k-tuple nucleotide in DNA sequence as weight and the physicochemical properties of k-tuple nucleotide to obtain DNA sequence features. Second, a two-layer model is proposed to process the acquired sequence feature information to predict the enhancer and its strength. The independent set test results show that this new feature method effectively improves the prediction accuracy of enhancers and their strengths, obtaining accuracy of 77.0% and 69.5%, respectively. Compared with the classical two feature methods, the new feature method shows greater advantages, and has greater improvement than the prediction results of the existing literature. This method is an effective supplement to the existing research methods.
增强子是DNA的一个小区域,可以与蛋白质结合。与蛋白质结合后,基因转录增强。利用传统的生物学实验方法鉴定增强子耗时长,成本高。然而,随着计算机技术的发展,越来越多的计算机技术应用于基因鉴定。这项研究有两个创新之处。首先,提出了一种新的特征信息PCWM方法,该方法将DNA序列中k元组核苷酸的归一化频率信息作为权重,结合k元组核苷酸的理化性质获得DNA序列特征;其次,提出了一种两层模型,对获取的序列特征信息进行处理,预测增强子及其强度;独立集测试结果表明,新特征方法有效地提高了增强器的预测精度及其强度,准确率分别达到77.0%和69.5%。与经典的两种特征方法相比,新特征方法显示出更大的优势,并且比现有文献的预测结果有更大的改进。该方法是对现有研究方法的有效补充。
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引用次数: 0
Localizing Epileptic Focus of Patients with Epilepsy Using Post-Ictal Scalp EEG 颅后脑电图在癫痫患者癫痫病灶定位中的应用
M. Yao, Chunsheng Li
Localization of the epileptic focus is crucial for epilepsy surgery. Pre-ictal EEG and interictal epileptic discharges are commonly used to localize the focus. Post-ictal scalp EEG may provide useful information for localizing the epileptic focus. This study proposed a non-invasive procedure to localize the epileptic focus via the EEG source imaging (ESI) and epileptic network analysis. Scalp EEG from two patients with drug-resistant epilepsy were used, and two segments of post-ictal EEG were analyzed. The sLORETA algorithm was applied to obtain signals in source space using the patient specific head model. Then we extracted the representative source signals of each brain area by singular value decomposition (SVD). The epileptic networks of different frequency bands in the source space were constructed by Granger causality analysis. The results showed that the regions identified by in-degree feature of low-frequency post-ictal epileptic network were concordant with surgical resected areas. The preliminary result indicates that post-ictal epileptic network in low frequency may potentially be used to identify the ictal focus for surgical planning.
癫痫病灶的定位对癫痫手术至关重要。脑电图和癫痫发作间期放电常用于定位病灶。脑电图可以为癫痫病灶的定位提供有用的信息。本研究提出了一种通过脑电图源成像(ESI)和癫痫网络分析来定位癫痫病灶的无创方法。对2例耐药癫痫患者的头皮脑电图进行分析。采用患者特异性头部模型,采用sLORETA算法在源空间获取信号。然后通过奇异值分解(SVD)提取各脑区的代表性源信号。通过格兰杰因果关系分析,构建了源空间中不同频段的癫痫网络。结果表明,低频癫痫发作后网络的度特征识别的区域与手术切除的区域一致。初步结果表明,低频癫痫发作后网络可能用于确定手术计划的癫痫发作灶。
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引用次数: 0
Abnormal Symbolic Transfer Entropy in Depression
Yangting Zhang, Yu-xi Luo
Depression is a mental illness and considered the main cause of disability worldwide. Further study is still needed to enhance the accuracy of depression detection. The aim of this study was to explore the potential EEG biomarker for cortical dysfunction to help the diagnosis with depression clinically. In this study, symbolic transfer entropy (STE) of five sleep periods (Wake, REM, N1, N2, N3) and four frequency bands (δ, θ, α, β) were obtained from six sleep EEG channels. Significant differences between the two groups were found. The average STE values in the patients with depression were lower than those of normal participants in all sleep periods and frequency bands. These findings indicated the lower complexity of brain and abnormalities in sleep cortical activity in patients with depression. It may provide insights into the influence of depression on cognitive function and important indicators for studying depression pathological mechanisms.
抑郁症是一种精神疾病,被认为是全世界致残的主要原因。为了提高抑郁症检测的准确性,还需要进一步的研究。本研究的目的是探索潜在的脑电生物标志物皮质功能障碍,以帮助抑郁症的临床诊断。本研究从6个睡眠脑电通道获取5个睡眠时段(Wake、REM、N1、N2、N3)和4个频段(δ、θ、α、β)的符号传递熵(STE)。发现两组之间存在显著差异。抑郁症患者在各睡眠时段和频带的平均STE值均低于正常人。这些发现表明,抑郁症患者的大脑复杂性较低,睡眠皮层活动异常。这可能为抑郁症对认知功能的影响提供新的认识,并为研究抑郁症的病理机制提供重要的指标。
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引用次数: 0
EEG-Based Depression Recognition Using Intrinsic Time-scale Decomposition and Temporal Convolution Network 基于脑电图的抑郁症识别——基于内在时间尺度分解和时间卷积网络
Yixin Wang, Fengrui Liu, Lijun Yang
The diagnosis and treatment of depression is very important since it brings a heavy burden to family and society. Because of the high sensitivity, relatively low cost, and convenient recording, electroencephalogram (EEG) has become an important tool for monitoring brain activity and is gradually being used in the auxiliary diagnosis of mental diseases. EEG signals are typically non-linear and non-stationary. Therefore, they are suitable to be dealt with by time-frequency analysis technique. In this paper, we propose a strategy that combines the time-frequency analysis technique and temporal convolution network for depression recognition. Firstly, we use the method of intrinsic time-scale decomposition to decompose each EEG recording to several components. And secondly, some statistical indices are calculated from the instantaneous amplitudes and instantaneous frequencies of these components to form the feature vectors. Thirdly, an improved temporal convolution network (TCN) is used to detect the depression from normal controls. Temporal convolution network is not only suitable for the sequence model, but also retains the parallel computing characteristics of the convolutional neural network. To improve the model performance, we further modify the original softmax loss of TCN as L-softmax. Experiments show the effectiveness of the proposed model. Furthermore, we find that the depressive patients and normal controls shows different patterns through functional connectivity analysis. Our analysis results can be used as an auxiliary tool to help psychiatrists diagnose patients with depression.
抑郁症的诊断和治疗非常重要,因为它给家庭和社会带来了沉重的负担。脑电图因其灵敏度高、成本相对较低、记录方便等优点,已成为监测脑活动的重要工具,并逐渐被用于精神疾病的辅助诊断。脑电信号是典型的非线性和非平稳信号。因此,它们适合用时频分析技术来处理。本文提出了一种将时频分析技术与时间卷积网络相结合的抑郁症识别策略。首先,采用内禀时间尺度分解方法,将每条脑电记录分解为多个分量。其次,根据这些分量的瞬时幅值和瞬时频率计算出一些统计指标,形成特征向量;第三,采用改进的时间卷积网络(TCN)检测正常对照的凹陷。时间卷积网络不仅适用于序列模型,而且保留了卷积神经网络的并行计算特性。为了提高模型的性能,我们进一步将TCN的原softmax loss修改为L-softmax。实验证明了该模型的有效性。此外,通过功能连通性分析,我们发现抑郁症患者和正常对照组表现出不同的模式。我们的分析结果可以作为辅助工具来帮助精神科医生诊断抑郁症患者。
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引用次数: 4
Multimodal Optimization Evolutionary Algorithm for RNA Secondary Structure Prediction RNA二级结构预测的多模态优化进化算法
Yunfei Hu, Kai Zhang
Recent years, RNA secondary structure prediction has attracted much attention of many researchers, which is an important way to grasp the biochemical function of RNA. However, it is very difficult to predict the RNA secondary structure including pseudoknot, which has been identified to be an NP-complete problem. In this paper, a novel multimodal optimization evolutionary algorithm is proposed to optimize the decision space based on the minimum free energy to predict the secondary structure of RNA. Because there exist multiple equivalent secondary structures which represent the same minimum free energy, our algorithm maintain diversity in decision space to find multiple sets of secondary structure simultaneously. The performance of our algorithm is evaluated by PseudoBase instances and compared with some good prediction algorithms. The comparison results show that our method has higher accuracy in RNA secondary structure prediction.
RNA二级结构预测是掌握RNA生化功能的重要途径,近年来备受研究者的关注。然而,包括假结在内的RNA二级结构的预测是非常困难的,这被认为是一个np完全问题。本文提出了一种基于最小自由能优化决策空间的多模态优化进化算法,用于预测RNA的二级结构。由于存在多个表示相同最小自由能的等价二级结构,因此算法在决策空间中保持多样性,可以同时找到多组二级结构。通过PseudoBase实例对算法的性能进行了评价,并与一些较好的预测算法进行了比较。结果表明,该方法具有较高的RNA二级结构预测精度。
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引用次数: 2
Preliminary Study of Local Gene Network in Epilepsy 癫痫局部基因网络的初步研究
Tianhe Zhang, Le Ao, Bo Sun, Chuyi Zhang, W. Su, Xingfeng Du, Changlu Guo, Yu Yang
This research taking epilepsy as the research object, uses network database resources to inquire and sort out the relevant genes, and uses the biological pathways involved in genes to successfully construct a local gene network. The coupling of the metabolic module proves that there is a complex connection between epilepsy and the nutritional metabolism module. To a certain extent, it reflects the important influence of nutritional metabolism on epilepsy, and also provides a basis for the prevention and treatment of epilepsy through diet and the development of new therapeutic drugs.
本研究以癫痫为研究对象,利用网络数据库资源对相关基因进行查询和梳理,利用基因参与的生物学途径,成功构建了局部基因网络。代谢模块的耦合证明癫痫与营养代谢模块之间存在复杂的联系。在一定程度上反映了营养代谢对癫痫的重要影响,也为通过饮食预防和治疗癫痫以及开发新的治疗药物提供了依据。
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引用次数: 0
Melt-based Electrohydrodynamic Bioprinting:: Heating Unit, Ambient Control, and Power Module Control 基于熔体的电流体动力生物打印:加热单元、环境控制和电源模块控制
Yu-lin Dong, Jie Sun
To understand the melt-based electrohydrodynamic (EHD) bioprinting, fabrication process related parameters such as melting temperature of the EHD ink solution and environmental factors within the fabrication chamber requires careful consideration and comprehensive experiments. The main purpose of this paper is to study the control of the heating and melting process of ink solutions, and environmental factors (temperature and humidity). Besides, a power module control unit is proposed to cut off the high voltage module output under abnormal conditions. These designs and testing can improve the current EHD scaffold printing system, which will be very helpful for stable scaffold fabrication in tissue engineering.
为了更好地理解基于熔体的电流体动力(EHD)生物打印,需要仔细考虑EHD油墨溶液的熔化温度和制造室内的环境因素等制造过程相关参数,并进行全面的实验。本文的主要目的是研究油墨溶液的加热和熔化过程的控制,以及环境因素(温度和湿度)。此外,还提出了一种电源模块控制单元,用于在异常情况下切断高压模块的输出。这些设计和测试可以改进现有的EHD支架打印系统,为组织工程中稳定的支架制造提供帮助。
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引用次数: 0
Overview of Machine Learning Methods for Genome-Wide Association Analysis 全基因组关联分析的机器学习方法综述
Minzhu Xie, Fang Liu
Genome-wide association studies (GWAS) is an effective way to reveal the pathogenic genes of complex diseases by analyzing the genotype information and related disease phenotype information on the SNP loci of the whole genome of a large number of living organisms. Machine learning (ML) is a method that allows computers to simulate human cognitive processes to solve problems. The advantage of using machine learning methods to carry out genome-wide association analysis research is that it does not require false anchor points or gene-gene interaction models in advance Instead of exhaustive search, computer algorithms that simulate human cognitive processes can learn from a large amount of data to discover the ability of nonlinear high-dimensional gene-gene interactions. In recent years, a large number of machine learning methods have been used in the study of genome-wide association analysis. This article will briefly introduct these methods.
全基因组关联研究(genome -wide association studies, GWAS)是通过分析大量生物体全基因组SNP位点上的基因型信息和相关疾病表型信息,揭示复杂疾病致病基因的有效途径。机器学习(ML)是一种允许计算机模拟人类认知过程来解决问题的方法。利用机器学习方法开展全基因组关联分析研究的优势在于,它不需要事先建立假锚点或基因-基因相互作用模型,而是通过模拟人类认知过程的计算机算法,从大量数据中学习,发现非线性高维基因-基因相互作用的能力。近年来,大量的机器学习方法被用于全基因组关联分析的研究。本文将简要介绍这些方法。
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引用次数: 0
期刊
The Fifth International Conference on Biological Information and Biomedical Engineering
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