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- research-articleApril 2024
Multi-Task Learning and Sparse Discriminant Canonical Correlation Analysis for Identification of Diagnosis-Specific Genotype-Phenotype Association
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 21, Issue 5Pages 1390–1402https://doi.org/10.1109/TCBB.2024.3386406The primary objective of imaging genetics research is to investigate the complex genotype-phenotype association for the disease under study. For example, to understand the impact of genetic variations over the brain functions and structure, the genotypic ...
- research-articleMarch 2024
Identifying Differentially Expressed Genes in RNA Sequencing Data With Small Labelled Samples
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 21, Issue 5Pages 1311–1321https://doi.org/10.1109/TCBB.2024.3382147RNA-seq, including bulk RNA-seq and single-cell RNA-seq, is a next-generation sequencing-based RNA profiling method capable of measuring gene expression patterns with high resolution, and has gradually become an essential tool for the analysis of ...
- research-articleNovember 2023
Inferring Markov Chains to Describe Convergent Tumor Evolution With CIMICE
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 21, Issue 1Pages 106–119https://doi.org/10.1109/TCBB.2023.3337258The field of tumor phylogenetics focuses on studying the differences within cancer cell populations. Many efforts are done within the scientific community to build cancer progression models trying to understand the heterogeneity of such diseases. These ...
- research-articleNovember 2023
The Exact Stochastic Process of the Haploid Multi-Allelic Wright-Fisher Mutation Model
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 21, Issue 1Pages 69–83https://doi.org/10.1109/TCBB.2023.3336850Diffusion models are widely applied in population genetics, but their approximate solutions may not accurately capture the exact stochastic process. Nevertheless, this practice was necessary due to computing limitations, particularly for large ...
- research-articleOctober 2023
An Event-Driven Approach to Genotype Imputation on a Custom RISC-V Cluster
- Jordan Morris,
- Ashur Rafiev,
- Graeme M. Bragg,
- Mark L. Vousden,
- David B. Thomas,
- Alex Yakovlev,
- Andrew D. Brown
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 21, Issue 1Pages 26–35https://doi.org/10.1109/TCBB.2023.3328714This article proposes an event-driven solution to genotype imputation, a technique used to statistically infer missing genetic markers in DNA. The work implements the widely accepted Li and Stephens model, primary contributor to the computational ...
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- research-articleOctober 2023
Effectiveness Analysis of Multiple Initial States Simulated Annealing Algorithm, a Case Study on the Molecular Docking Tool AutoDock Vina
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 6Pages 3830–3841https://doi.org/10.1109/TCBB.2023.3323552Simulated Annealing (SA) algorithm is not effective with large optimization problems for its slow convergence. Hence, several parallel Simulated Annealing (pSA) methods have been proposed, where the increase of searching threads can boost the speed of ...
- research-articleJune 2023
Efficient Inference of Spatially-Varying Gaussian Markov Random Fields With Applications in Gene Regulatory Networks
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 5Pages 2920–2932https://doi.org/10.1109/TCBB.2023.3282028In this paper, we study the problem of inferring spatially-varying Gaussian Markov random fields (SV-GMRF) where the goal is to learn a network of sparse, context-specific GMRFs representing network relationships between genes. An important application of ...
- research-articleOctober 2022
Assessment of Prediction Uncertainty Quantification Methods in Systems Biology
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 3Pages 1725–1736https://doi.org/10.1109/TCBB.2022.3213914Biological processes are often modelled using ordinary differential equations. The unknown parameters of these models are estimated by optimizing the fit of model simulation and experimental data. The resulting parameter estimates inevitably possess some ...
- research-articleAugust 2022
WGRLR: A Weighted Group Regularized Logistic Regression for Cancer Diagnosis and Gene Selection
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 2Pages 1563–1573https://doi.org/10.1109/TCBB.2022.3203167Sparse regressions applied to cancer diagnosis suffer from noise reduction, gene grouping, and group significance evaluation. This paper presented the weighted group regularized logistic regression (WGRLR) for dealing with the above problems. Clean data ...
- research-articleJuly 2022
Explainable Drug Repurposing Approach From Biased Random Walks
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 2Pages 1009–1019https://doi.org/10.1109/TCBB.2022.3191392Drug repurposing is a highly active research area, aiming at finding novel uses for drugs that have been previously developed for other therapeutic purposes. Despite the flourishing of methodologies, success is still partial, and different approaches ...
- research-articleMay 2022
Testing Multispecies Coalescent Simulators Using Summary Statistics
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 2Pages 1613–1618https://doi.org/10.1109/TCBB.2022.3177956As genomic-scale datasets motivate research on species tree inference, simulators of the multispecies coalescent (MSC) process have become essential for the testing and evaluation of new inference methods. However, the simulators themselves must be tested ...
- research-articleMay 2022
Robust KALMAN Filter State Estimation for Gene Regulatory Networks
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 2Pages 1395–1405https://doi.org/10.1109/TCBB.2022.3173969This paper proposes a revised version of the robust generalized maximum likelihood (GM)-type unscented KALMAN filter (GM-UKF) for the state estimation of gene regulatory networks (GRNs) in the presence of different types of deviations from assumptions. As ...
- research-articleMay 2022
Joint Sparse Collaborative Regression on Imaging Genetics Study of Schizophrenia
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 2Pages 1137–1146https://doi.org/10.1109/TCBB.2022.3172289The imaging genetics approach generates large amount of high dimensional and multi-modal data, providing complementary information for comprehensive study of Schizophrenia, a complex mental disease. However, at the same time, the variety of these data in ...
- research-articleApril 2022
Small-Sample Estimation of the Mutational Support and Distribution of SARS-CoV-2
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 1Pages 668–682https://doi.org/10.1109/TCBB.2022.3165395We consider the problem of determining the <italic>mutational support and distribution</italic> of the SARS-CoV-2 viral genome in the small-sample regime. The mutational support refers to the unknown number of sites that may eventually mutate in the SARS-...
- research-articleMarch 2022
A Fitted Sparse-Group Lasso for Genome-Based Evaluations
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 1Pages 30–38https://doi.org/10.1109/TCBB.2022.3156805In life sciences, high-throughput techniques typically lead to high-dimensional data and often the number of covariates is much larger than the number of observations. This inherently comes with multicollinearity challenging a statistical analysis in a ...
- research-articleJanuary 2022
Constructing a Cancer Patient-Specific Network Based on Second-Order Partial Correlations of Gene Expression and DNA Methylation
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 1Pages 266–276https://doi.org/10.1109/TCBB.2022.3145796Typically patient-specific gene networks are constructed with gene expression data only. Such networks cannot distinguish direct gene interactions from indirect interactions via others such as the effect of epigenetic events to gene activity. There is an ...
- research-articleJanuary 2022
Identification of Gene Regulatory Networks Using Variational Bayesian Inference in the Presence of Missing Data
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 1Pages 399–409https://doi.org/10.1109/TCBB.2022.3144418The identification of gene regulatory networks (GRN) from gene expression time series data is a challenge and open problem in system biology. This paper considers the structure inference of GRN from the incomplete and noisy gene expression data, which is ...
- research-articleJanuary 2022
Inferring Microbial Biomass Yield and Cell Weight Using Probabilistic Macrochemical Modeling
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 20, Issue 1Pages 442–454https://doi.org/10.1109/TCBB.2021.3139290Growth rates and biomass yields are key descriptors used in microbiology studies to understand how microbial species respond to changes in the environment. Of these, biomass yield estimates are typically obtained using cell counts and measurements of the ...
- research-articleAugust 2021
A Robust and Generalizable Immune-Related Signature for Sepsis Diagnostics
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 19, Issue 6Pages 3246–3254https://doi.org/10.1109/TCBB.2021.3107874High-throughput sequencing can detect tens of thousands of genes in parallel, providing opportunities for improving the diagnostic accuracy of multiple diseases including sepsis, which is an aggressive inflammatory response to infection that can cause ...
- research-articleAugust 2021
A Computational Monte Carlo Simulation Strategy to Determine the Temporal Ordering of Abnormal Age Onset Among Biomarkers of Alzheimer's Disease
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB), Volume 19, Issue 5Pages 2613–2622https://doi.org/10.1109/TCBB.2021.3106939To quantitatively determining the temporal ordering of abnormal age onsets (AAO) among various biomarkers for Alzheimer's disease (AD), we introduced a computational Monte-Carlo simulation (CMCS) to statistically examine such ordering of an AAO ...