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Network Modeling and Analysis in Health Informatics and Bioinformatics最新文献

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Temporal networks in biology and medicine: a survey on models, algorithms, and tools. 生物学和医学中的时间网络:关于模型、算法和工具的调查。
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2023-01-01 DOI: 10.1007/s13721-022-00406-x
Mohammad Mehdi Hosseinzadeh, Mario Cannataro, Pietro Hiram Guzzi, Riccardo Dondi

The use of static graphs for modelling and analysis of biological and biomedical data plays a key role in biomedical research. However, many real-world scenarios present dynamic behaviours resulting in both node and edges modification as well as feature evolution. Consequently, ad-hoc models for capturing these evolutions along the time have been introduced, also referred to as dynamic, temporal, time-varying graphs. Here, we focus on temporal graphs, i.e., graphs whose evolution is represented by a sequence of time-ordered snapshots. Each snapshot represents a graph active in a particular timestamp. We survey temporal graph models and related algorithms, presenting fundamentals aspects and the recent advances. We formally define temporal graphs, focusing on the problem setting and we present their main applications in biology and medicine. We also present temporal graph embedding and the application to recent problems such as epidemic modelling. Finally, we further state some promising research directions in the area. Main results of this study include a systematic review of fundamental temporal network problems and their algorithmic solutions considered in the literature, in particular those having application in computational biology and medicine. We also include the main software developed in this context.

使用静态图形对生物和生物医学数据进行建模和分析在生物医学研究中起着关键作用。然而,许多现实场景呈现动态行为,导致节点和边缘修改以及特征进化。因此,引入了用于捕获这些随时间变化的特定模型,也称为动态的、时间的、时变的图。在这里,我们关注的是时间图,即其演变由一系列时间顺序快照表示的图。每个快照表示在特定时间戳中活动的图形。我们概述了时间图模型和相关算法,介绍了基本方面和最新进展。我们正式定义了时间图,着重于问题设置,并介绍了它们在生物学和医学中的主要应用。我们还介绍了时间图嵌入及其在流行病建模等最新问题中的应用。最后,对该领域的研究方向进行了展望。本研究的主要结果包括对文献中考虑的基本时间网络问题及其算法解决方案的系统回顾,特别是那些在计算生物学和医学中的应用。我们还包括在此背景下开发的主要软件。
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引用次数: 5
COVID-19 and pneumonia diagnosis from chest X-ray images using convolutional neural networks. 基于卷积神经网络的胸部x线图像COVID-19和肺炎诊断
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2023-01-01 DOI: 10.1007/s13721-023-00413-6
Muhab Hariri, Ercan Avşar

X-ray is a useful imaging modality widely utilized for diagnosing COVID-19 virus that infected a high number of people all around the world. The manual examination of these X-ray images may cause problems especially when there is lack of medical staff. Usage of deep learning models is known to be helpful for automated diagnosis of COVID-19 from the X-ray images. However, the widely used convolutional neural network architectures typically have many layers causing them to be computationally expensive. To address these problems, this study aims to design a lightweight differential diagnosis model based on convolutional neural networks. The proposed model is designed to classify the X-ray images belonging to one of the four classes that are Healthy, COVID-19, viral pneumonia, and bacterial pneumonia. To evaluate the model performance, accuracy, precision, recall, and F1-Score were calculated. The performance of the proposed model was compared with those obtained by applying transfer learning to the widely used convolutional neural network models. The results showed that the proposed model with low number of computational layers outperforms the pre-trained benchmark models, achieving an accuracy value of 89.89% while the best pre-trained model (Efficient-Net B2) achieved accuracy of 85.7%. In conclusion, the proposed lightweight model achieved the best overall result in classifying lung diseases allowing it to be used on devices with limited computational power. On the other hand, all the models showed a poor precision on viral pneumonia class and confusion in distinguishing it from bacterial pneumonia class, thus a decrease in the overall accuracy.

x射线是一种有用的成像方式,广泛用于诊断全球感染人数众多的COVID-19病毒。人工检查这些x射线图像可能会造成问题,特别是在缺乏医务人员的情况下。据悉,使用深度学习模型有助于从x射线图像中自动诊断COVID-19。然而,广泛使用的卷积神经网络架构通常有很多层,导致它们的计算成本很高。为了解决这些问题,本研究旨在设计一个基于卷积神经网络的轻量级鉴别诊断模型。该模型旨在对属于健康、COVID-19、病毒性肺炎和细菌性肺炎四类之一的x射线图像进行分类。为了评估模型的性能,我们计算了准确率、精密度、召回率和F1-Score。将该模型的性能与将迁移学习应用于广泛使用的卷积神经网络模型所获得的性能进行了比较。结果表明,该模型计算层数较少,优于预训练的基准模型,准确率达到89.89%,而最佳预训练模型(Efficient-Net B2)准确率达到85.7%。总之,所提出的轻量级模型在肺部疾病分类方面取得了最佳的总体结果,使其能够在计算能力有限的设备上使用。另一方面,所有模型在病毒性肺炎类别上的精度较差,并且在区分病毒性肺炎类别和细菌性肺炎类别方面存在混淆,从而降低了整体准确性。
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引用次数: 4
Molecule generation toward target protein (SARS-CoV-2) using reinforcement learning-based graph neural network via knowledge graph. 基于知识图谱的基于强化学习的图神经网络对目标蛋白(SARS-CoV-2)的分子生成。
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2023-01-01 DOI: 10.1007/s13721-023-00409-2
Amit Ranjan, Hritik Kumar, Deepshikha Kumari, Archit Anand, Rajiv Misra

AI-driven approaches are widely used in drug discovery, where candidate molecules are generated and tested on a target protein for binding affinity prediction. However, generating new compounds with desirable molecular properties such as Quantitative Estimate of Drug-likeness (QED) and Dopamine Receptor D2 activity (DRD2) while adhering to distinct chemical laws is challenging. To address these challenges, we proposed a graph-based deep learning framework to generate potential therapeutic drugs targeting the SARS-CoV-2 protein. Our proposed framework consists of two modules: a novel reinforcement learning (RL)-based graph generative module with knowledge graph (KG) and a graph early fusion approach (GEFA) for binding affinity prediction. The first module uses a gated graph neural network (GGNN) model under the RL environment for generating novel molecular compounds with desired properties and a custom-made KG for molecule screening. The second module uses GEFA to predict binding affinity scores between the generated compounds and target proteins. Experiments show how fine-tuning the GGNN model under the RL environment enhances the molecules with desired properties to generate 100 % valid and 100 % unique compounds using different scoring functions. Additionally, KG-based screening reduces the search space of generated candidate molecules by 96.64 % while retaining 95.38 % of promising binding molecules against SARS-CoV-2 protein, i.e., 3C-like protease (3CLpro). We achieved a binding affinity score of 8.185 from the top rank of generated compound. In addition, we compared top-ranked generated compounds to Indinavir on different parameters, including drug-likeness and medicinal chemistry, for qualitative analysis from a drug development perspective.

Supplementary information: The online version contains supplementary material available at 10.1007/s13721-023-00409-2.

人工智能驱动的方法广泛用于药物发现,其中候选分子被生成并在目标蛋白上进行测试,以预测结合亲和力。然而,产生具有理想分子特性的新化合物,如定量估计药物相似性(QED)和多巴胺受体D2活性(DRD2),同时遵守不同的化学规律是具有挑战性的。为了应对这些挑战,我们提出了一个基于图的深度学习框架,以生成针对SARS-CoV-2蛋白的潜在治疗药物。我们提出的框架由两个模块组成:一个基于知识图(KG)的新型强化学习(RL)的图生成模块和一个用于绑定亲和力预测的图早期融合方法(GEFA)。第一个模块在RL环境下使用门控图神经网络(GGNN)模型生成具有所需性质的新分子化合物,并使用定制的KG进行分子筛选。第二个模块使用GEFA来预测生成的化合物与目标蛋白之间的结合亲和力评分。实验表明,在RL环境下微调GGNN模型如何增强具有所需性质的分子,从而使用不同的评分函数生成100%有效和100%独特的化合物。此外,基于kg的筛选将生成的候选分子的搜索空间减少了96.64%,同时保留了95.38%的针对SARS-CoV-2蛋白的有希望的结合分子,即3c样蛋白酶(3CLpro)。在合成的化合物中,我们获得了8.185的结合亲和力评分。此外,我们还将排名靠前的合成化合物与Indinavir进行了不同参数的比较,包括药物相似性和药物化学,从药物开发的角度进行了定性分析。补充资料:在线版本提供补充资料,网址为10.1007/s13721-023-00409-2。
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引用次数: 0
An application of optimal control in medical systems: optimal investment strategy in doctors. 最优控制在医疗系统中的应用:医生的最优投资策略。
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2023-01-01 DOI: 10.1007/s13721-022-00408-9
Mustafa Akan, Ebru Geçici

Health care is ever more important with the aging population and with the increased awareness of the importance of the medical systems due to the corona crisis that showed the capacity of the health care infrastructure, especially in terms of numbers of health care personnel such as doctors, was not sufficient. Assuming that the number of doctors per patient is one of the determinants of patient satisfaction, optimal investments in new doctors, specialist doctors and foreign doctors are analyzed. Optimal Control Theory is employed to determine the optimal investment strategy for new doctors (new graduates), specialists and foreign doctors to maximize the net (of costs) patient satisfaction over a fixed time horizon. It is found that a nation with an insufficient number of total doctors and specialist doctors at the beginning of the planning horizon should increase the investment in new doctors as a quadratic function of time, increase the local specialist doctors linearly, while employing foreign doctors as to equate their cost to the marginal satisfaction of patients.

随着人口老龄化和冠状病毒危机对医疗系统重要性的认识日益提高,卫生保健变得越来越重要,这表明卫生保健基础设施的能力,特别是在医生等卫生保健人员的数量方面,是不够的。假设每位患者的医生数量是患者满意度的决定因素之一,分析了对新医生、专科医生和外国医生的最佳投资。采用最优控制理论确定新医生(新毕业生)、专科医生和外国医生的最优投资策略,以在固定的时间范围内最大化患者的净(成本)满意度。研究发现,当一国在规划初期总医生和专科医生数量不足时,应以时间的二次函数增加对新医生的投入,线性增加本地专科医生,同时聘请外国医生,使其成本与患者的边际满意度相等。
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引用次数: 0
Modeling methods and the degree of parameter uncertainty in probabilistic analyses of economic evaluations 经济评价概率分析中的建模方法和参数不确定程度
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-12-28 DOI: 10.1007/s13721-022-00404-z
Xuanqian Xie, O. Gajic-Veljanoski, W. Ungar, Chengyu Gao, S. Hussain, Hong Anh Tu, Andrei Volodin
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引用次数: 0
Transcriptional expression and prognostic roles of MCM7 in human bladder, breast, and lung cancers: a multi-omics analysis MCM7在膀胱癌、乳腺癌和肺癌中的转录表达和预后作用:一项多组学分析
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-12-28 DOI: 10.1007/s13721-022-00405-y
A. Samad, Md. Anowar Khasru Parvez, Md. Amdadul Huq, Md. Shahedur Rahman
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引用次数: 0
Mathematical model of the tumor cells’ population growth 肿瘤细胞群生长的数学模型
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-11-29 DOI: 10.1007/s13721-022-00399-7
Nishant Namdev, Himanshu Jain, A. Sinha
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引用次数: 0
Retraction Note: Artificial intelligence for a bio-sensored detection of tuberculosis 撤回注:人工智能用于结核病的生物感应检测
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-11-15 DOI: 10.1007/s13721-022-00396-w
S. Tamilselvi, N. M. Saravana Kumar, S. Lavanya, J. Bindhu, N. Kaviyavarshini
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引用次数: 0
MTSE U-Net: an architecture for segmentation, and prediction of fetal brain and gestational age from MRI of brain MTSE U-Net:一个从大脑MRI中分割和预测胎儿大脑和胎龄的架构
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-11-12 DOI: 10.1007/s13721-022-00394-y
Tuhinangshu Gangopadhyay, Shinjini Halder, Paramik Dasgupta, Kingshuk Chatterjee, Debayan Ganguly, Surjadeep Sarkar, S. Roy
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引用次数: 11
Plectin as a putative novel biomarker for breast cancer: an in silico study Plectin作为一种新的乳腺癌生物标志物:一项计算机研究
IF 2.3 Q3 MATHEMATICAL & COMPUTATIONAL BIOLOGY Pub Date : 2022-11-07 DOI: 10.1007/s13721-022-00392-0
Madhushree M. V. Rao, M. Likith, R. Kavya, T. Hariprasad
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引用次数: 1
期刊
Network Modeling and Analysis in Health Informatics and Bioinformatics
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