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Mansoor S, Hamid S, Tuan TT, Park JE, Chung YS. Advance computational tools for multiomics data learning. Biotechnol Adv 2024; 77:108447. [PMID: 39251098 DOI: 10.1016/j.biotechadv.2024.108447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 09/01/2024] [Accepted: 09/05/2024] [Indexed: 09/11/2024]
Abstract
The burgeoning field of bioinformatics has seen a surge in computational tools tailored for omics data analysis driven by the heterogeneous and high-dimensional nature of omics data. In biomedical and plant science research multi-omics data has become pivotal for predictive analytics in the era of big data necessitating sophisticated computational methodologies. This review explores a diverse array of computational approaches which play crucial role in processing, normalizing, integrating, and analyzing omics data. Notable methods such similarity-based methods, network-based approaches, correlation-based methods, Bayesian methods, fusion-based methods and multivariate techniques among others are discussed in detail, each offering unique functionalities to address the complexities of multi-omics data. Furthermore, this review underscores the significance of computational tools in advancing our understanding of data and their transformative impact on research.
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Affiliation(s)
- Sheikh Mansoor
- Department of Plant Resources and Environment, Jeju National University, 63243, Republic of Korea
| | - Saira Hamid
- Watson Crick Centre for Molecular Medicine, Islamic University of Science and Technology, Awantipora, Pulwama, J&K, India
| | - Thai Thanh Tuan
- Department of Plant Resources and Environment, Jeju National University, 63243, Republic of Korea; Multimedia Communications Laboratory, University of Information Technology, Ho Chi Minh city 70000, Vietnam; Multimedia Communications Laboratory, Vietnam National University, Ho Chi Minh city 70000, Vietnam
| | - Jong-Eun Park
- Department of Animal Biotechnology, College of Applied Life Science, Jeju National University, Jeju, Jeju-do, Republic of Korea.
| | - Yong Suk Chung
- Department of Plant Resources and Environment, Jeju National University, 63243, Republic of Korea.
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2
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Wei L, Mast FD, Aitchison JD, Kaushansky A. Systems-level reconstruction of kinase phosphosignaling networks regulating endothelial barrier integrity using temporal data. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.01.606198. [PMID: 39149238 PMCID: PMC11326140 DOI: 10.1101/2024.08.01.606198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Phosphosignaling networks control cellular processes. We built kinase-mediated regulatory networks elicited by thrombin stimulation of brain endothelial cells using two computational strategies: Temporal Pathway Synthesizer (TPS), which uses phosphoproetiomics data as input, and Temporally REsolved KInase Network Generation (TREKING), which uses kinase inhibitor screens. TPS and TREKING predicted overlapping barrier-regulatory kinases connected with unique network topology. Each strategy effectively describes regulatory signaling networks and is broadly applicable across biological systems.
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Affiliation(s)
- Ling Wei
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, United States
| | - Fred D. Mast
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, United States
- Department of Pediatrics, University of Washington, Seattle, WA 98105, United States
| | - John D. Aitchison
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, United States
- Department of Pediatrics, University of Washington, Seattle, WA 98105, United States
- Department of Biochemistry, University of Washington, Seattle, WA 98105, United States
| | - Alexis Kaushansky
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98109, United States
- Department of Pediatrics, University of Washington, Seattle, WA 98105, United States
- Department of Global Health, University of Washington, Seattle, WA 98105, United States
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3
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Afzal J, Liu Y, Du W, Suhail Y, Zong P, Feng J, Ajeti V, Sayyad WA, Nikolaus J, Yankova M, Deymier AC, Yue L, Kshitiz. Cardiac ultrastructure inspired matrix induces advanced metabolic and functional maturation of differentiated human cardiomyocytes. Cell Rep 2022; 40:111146. [PMID: 35905711 DOI: 10.1016/j.celrep.2022.111146] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/26/2022] [Accepted: 07/07/2022] [Indexed: 12/21/2022] Open
Abstract
The vast potential of human induced pluripotent stem-cell-derived cardiomyocytes (hiPSC-CMs) in preclinical models of cardiac pathologies, precision medicine, and drug screening remains to be fully realized because hiPSC-CMs are immature without adult-like characteristics. Here, we present a method to accelerate hiPSC-CM maturation on a substrate, cardiac mimetic matrix (CMM), mimicking adult human heart matrix ligand chemistry, rigidity, and submicron ultrastructure, which synergistically mature hiPSC-CMs rapidly within 30 days. hiPSC-CMs matured on CMM exhibit systemic transcriptomic maturation toward an adult heart state, are aligned with high strain energy, metabolically rely on oxidative phosphorylation and fatty acid oxidation, and display enhanced redox handling capability, efficient calcium handling, and electrophysiological features of ventricular myocytes. Endothelin-1-induced pathological hypertrophy is mitigated on CMM, highlighting the role of a native cardiac microenvironment in withstanding hypertrophy progression. CMM is a convenient model for accelerated development of ventricular myocytes manifesting highly specialized cardiac-specific functions.
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Affiliation(s)
- Junaid Afzal
- Department of Medicine, Division of Cardiology, University of California, San Francisco, San Francisco, CA 94158, USA.
| | - Yamin Liu
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA
| | - Wenqiang Du
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA
| | - Yasir Suhail
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA; Center for Cellular Analysis and Modeling, University of Connecticut Health, Farmington, CT 06032, USA
| | - Pengyu Zong
- Department of Cell Biology, University of Connecticut Health, Farmington, CT 06032, USA; Calhoun Cardiology Center, University of Connecticut Health, Farmington, CT 06032, USA
| | - Jianlin Feng
- Department of Cell Biology, University of Connecticut Health, Farmington, CT 06032, USA; Calhoun Cardiology Center, University of Connecticut Health, Farmington, CT 06032, USA
| | - Visar Ajeti
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA; Center for Cellular Analysis and Modeling, University of Connecticut Health, Farmington, CT 06032, USA
| | - Wasim A Sayyad
- Department of Cell Biology, Yale University, New Haven, CT 06510, USA
| | - Joerg Nikolaus
- West Campus Imaging Core, Yale University, New Haven, CT 06477, USA
| | - Maya Yankova
- Electron Microscopy Core, University of Connecticut Health, Farmington, CT 06032, USA
| | - Alix C Deymier
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA
| | - Lixia Yue
- Department of Cell Biology, University of Connecticut Health, Farmington, CT 06032, USA; Calhoun Cardiology Center, University of Connecticut Health, Farmington, CT 06032, USA
| | - Kshitiz
- Department of Biomedical Engineering, University of Connecticut Health, Farmington, CT 06032, USA; Center for Cellular Analysis and Modeling, University of Connecticut Health, Farmington, CT 06032, USA; Department of Cell Biology, University of Connecticut Health, Farmington, CT 06032, USA.
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Hammelman J, Patel T, Closser M, Wichterle H, Gifford D. Ranking reprogramming factors for cell differentiation. Nat Methods 2022; 19:812-822. [PMID: 35710610 PMCID: PMC10460539 DOI: 10.1038/s41592-022-01522-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 05/13/2022] [Indexed: 12/16/2022]
Abstract
Transcription factor over-expression is a proven method for reprogramming cells to a desired cell type for regenerative medicine and therapeutic discovery. However, a general method for the identification of reprogramming factors to create an arbitrary cell type is an open problem. Here we examine the success rate of methods and data for differentiation by testing the ability of nine computational methods (CellNet, GarNet, EBseq, AME, DREME, HOMER, KMAC, diffTF and DeepAccess) to discover and rank candidate factors for eight target cell types with known reprogramming solutions. We compare methods that use gene expression, biological networks and chromatin accessibility data, and comprehensively test parameter and preprocessing of input data to optimize performance. We find the best factor identification methods can identify an average of 50-60% of reprogramming factors within the top ten candidates, and methods that use chromatin accessibility perform the best. Among the chromatin accessibility methods, complex methods DeepAccess and diffTF have higher correlation with the ranked significance of transcription factor candidates within reprogramming protocols for differentiation. We provide evidence that AME and diffTF are optimal methods for transcription factor recovery that will allow for systematic prioritization of transcription factor candidates to aid in the design of new reprogramming protocols.
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Affiliation(s)
- Jennifer Hammelman
- Computational and Systems Biology, MIT, Cambridge, MA, USA
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, MA, USA
| | - Tulsi Patel
- Departments of Pathology and Cell Biology, Neuroscience, Rehabilitation and Regenerative Medicine (in Neurology), Columbia University Irving Medical Center, New York, NY, USA
- Center for Motor Neuron Biology and Disease, Columbia University Irving Medical Center, New York, NY, USA
- Columbia Stem Cell Initiative, Columbia University Irving Medical Center, New York, NY, USA
| | - Michael Closser
- Departments of Pathology and Cell Biology, Neuroscience, Rehabilitation and Regenerative Medicine (in Neurology), Columbia University Irving Medical Center, New York, NY, USA
- Center for Motor Neuron Biology and Disease, Columbia University Irving Medical Center, New York, NY, USA
- Columbia Stem Cell Initiative, Columbia University Irving Medical Center, New York, NY, USA
| | - Hynek Wichterle
- Departments of Pathology and Cell Biology, Neuroscience, Rehabilitation and Regenerative Medicine (in Neurology), Columbia University Irving Medical Center, New York, NY, USA
- Center for Motor Neuron Biology and Disease, Columbia University Irving Medical Center, New York, NY, USA
- Columbia Stem Cell Initiative, Columbia University Irving Medical Center, New York, NY, USA
| | - David Gifford
- Computational and Systems Biology, MIT, Cambridge, MA, USA.
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, MA, USA.
- Department of Biological Engineering, MIT, Cambridge, MA, USA.
- Department of Electrical Engineering and Computer Science, MIT, Cambridge, MA, USA.
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5
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Liu T, Zhu B, Liu Y, Zhang X, Yin J, Li X, Jiang L, Hodges AP, Rosenthal SB, Zhou L, Yancey J, McQuade A, Blurton-Jones M, Tanzi RE, Huang TY, Xu H. Multi-omic comparison of Alzheimer's variants in human ESC-derived microglia reveals convergence at APOE. J Exp Med 2021; 217:152099. [PMID: 32941599 PMCID: PMC7953740 DOI: 10.1084/jem.20200474] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/14/2020] [Accepted: 06/26/2020] [Indexed: 12/14/2022] Open
Abstract
Variations in many genes linked to sporadic Alzheimer’s disease (AD) show abundant expression in microglia, but relationships among these genes remain largely elusive. Here, we establish isogenic human ESC–derived microglia-like cell lines (hMGLs) harboring AD variants in CD33, INPP5D, SORL1, and TREM2 loci and curate a comprehensive atlas comprising ATAC-seq, ChIP-seq, RNA-seq, and proteomics datasets. AD-like expression signatures are observed in AD mutant SORL1 and TREM2 hMGLs, while integrative multi-omic analysis of combined epigenetic and expression datasets indicates up-regulation of APOE as a convergent pathogenic node. We also observe cross-regulatory relationships between SORL1 and TREM2, in which SORL1R744X hMGLs induce TREM2 expression to enhance APOE expression. AD-associated SORL1 and TREM2 mutations also impaired hMGL Aβ uptake in an APOE-dependent manner in vitro and attenuated Aβ uptake/clearance in mouse AD brain xenotransplants. Using this modeling and analysis platform for human microglia, we provide new insight into epistatic interactions in AD genes and demonstrate convergence of microglial AD genes at the APOE locus.
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Affiliation(s)
- Tongfei Liu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Bing Zhu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Yan Liu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Xiaoming Zhang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Jun Yin
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Xiaoguang Li
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - LuLin Jiang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Andrew P Hodges
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Sara Brin Rosenthal
- Center for Computational Biology and Bioinformatics, University of California, San Diego School of Medicine, La Jolla, CA
| | - Lisa Zhou
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Joel Yancey
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Amanda McQuade
- Institute for Memory Impairments and Neurological Disorders, University of California, Irvine, Irvine, CA.,Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA.,Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, CA
| | - Mathew Blurton-Jones
- Institute for Memory Impairments and Neurological Disorders, University of California, Irvine, Irvine, CA.,Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA.,Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, CA
| | - Rudolph E Tanzi
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA
| | - Timothy Y Huang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Huaxi Xu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
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Magnano CS, Gitter A. Automating parameter selection to avoid implausible biological pathway models. NPJ Syst Biol Appl 2021; 7:12. [PMID: 33623016 PMCID: PMC7902638 DOI: 10.1038/s41540-020-00167-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 12/07/2020] [Indexed: 11/28/2022] Open
Abstract
A common way to integrate and analyze large amounts of biological "omic" data is through pathway reconstruction: using condition-specific omic data to create a subnetwork of a generic background network that represents some process or cellular state. A challenge in pathway reconstruction is that adjusting pathway reconstruction algorithms' parameters produces pathways with drastically different topological properties and biological interpretations. Due to the exploratory nature of pathway reconstruction, there is no ground truth for direct evaluation, so parameter tuning methods typically used in statistics and machine learning are inapplicable. We developed the pathway parameter advising algorithm to tune pathway reconstruction algorithms to minimize biologically implausible predictions. We leverage background knowledge in pathway databases to select pathways whose high-level structure resembles that of manually curated biological pathways. At the core of this method is a graphlet decomposition metric, which measures topological similarity to curated biological pathways. In order to evaluate pathway parameter advising, we compare its performance in avoiding implausible networks and reconstructing pathways from the NetPath database with other parameter selection methods across four pathway reconstruction algorithms. We also demonstrate how pathway parameter advising can guide reconstruction of an influenza host factor network. Pathway parameter advising is method agnostic; it is applicable to any pathway reconstruction algorithm with tunable parameters.
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Affiliation(s)
- Chris S Magnano
- Department of Computer Sciences, University of Wisconsin-Madison, Madison, WI, USA
- Morgridge Institute for Research, Madison, WI, USA
| | - Anthony Gitter
- Department of Computer Sciences, University of Wisconsin-Madison, Madison, WI, USA.
- Morgridge Institute for Research, Madison, WI, USA.
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, USA.
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Gloeckner CJ, Porras P. Guilt-by-Association - Functional Insights Gained From Studying the LRRK2 Interactome. Front Neurosci 2020; 14:485. [PMID: 32508578 PMCID: PMC7251075 DOI: 10.3389/fnins.2020.00485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022] Open
Abstract
The Parkinson's disease-associated Leucine-rich repeat kinase 2 (LRRK2) is a complex multi-domain protein belonging to the Roco protein family, a unique group of G-proteins. Variants of this gene are associated with an increased risk of Parkinson's disease. Besides its well-characterized enzymatic activities, conferred by its GTPase and kinase domains, and a central dimerization domain, it contains four predicted repeat domains, which are, based on their structure, commonly involved in protein-protein interactions (PPIs). In the past decades, tremendous progress has been made in determining comprehensive interactome maps for the human proteome. Knowledge of PPIs has been instrumental in assigning functions to proteins involved in human disease and helped to understand the connectivity between different disease pathways and also significantly contributed to the functional understanding of LRRK2. In addition to an increased kinase activity observed for proteins containing PD-associated variants, various studies helped to establish LRRK2 as a large scaffold protein in the interface between cytoskeletal dynamics and the vesicular transport. This review first discusses a number of specific LRRK2-associated PPIs for which a functional consequence can at least be speculated upon, and then considers the representation of LRRK2 protein interactions in public repositories, providing an outlook on open research questions and challenges in this field.
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Affiliation(s)
- Christian Johannes Gloeckner
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
- Center for Ophthalmology, Institute for Ophthalmic Research, Core Facility for Medical Bioanalytics, University of Tübingen, Tübingen, Germany
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Pablo Porras
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Cherry Hinton, United Kingdom
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O’Donnell ST, Ross RP, Stanton C. The Progress of Multi-Omics Technologies: Determining Function in Lactic Acid Bacteria Using a Systems Level Approach. Front Microbiol 2020; 10:3084. [PMID: 32047482 PMCID: PMC6997344 DOI: 10.3389/fmicb.2019.03084] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 12/20/2019] [Indexed: 12/12/2022] Open
Abstract
Lactic Acid Bacteria (LAB) have long been recognized as having a significant impact ranging from commercial to health domains. A vast amount of research has been carried out on these microbes, deciphering many of the pathways and components responsible for these desirable effects. However, a large proportion of this functional information has been derived from a reductionist approach working with pure culture strains. This provides limited insight into understanding the impact of LAB within intricate systems such as the gut microbiome or multi strain starter cultures. Whole genome sequencing of strains and shotgun metagenomics of entire systems are powerful techniques that are currently widely used to decipher function in microbes, but they also have their limitations. An available genome or metagenome can provide an image of what a strain or microbiome, respectively, is potentially capable of and the functions that they may carry out. A top-down, multi-omics approach has the power to resolve the functional potential of an ecosystem into an image of what is being expressed, translated and produced. With this image, it is possible to see the real functions that members of a system are performing and allow more accurate and impactful predictions of the effects of these microorganisms. This review will discuss how technological advances have the potential to increase the yield of information from genomics, transcriptomics, proteomics and metabolomics. The potential for integrated omics to resolve the role of LAB in complex systems will also be assessed. Finally, the current software approaches for managing these omics data sets will be discussed.
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Affiliation(s)
- Shane Thomas O’Donnell
- Teagasc Food Research Centre, Moorepark, Fermoy, Ireland
- Department of Microbiology, University College Cork – National University of Ireland, Cork, Ireland
- APC Microbiome Ireland, Cork, Ireland
| | - R. Paul Ross
- Teagasc Food Research Centre, Moorepark, Fermoy, Ireland
- Department of Microbiology, University College Cork – National University of Ireland, Cork, Ireland
- APC Microbiome Ireland, Cork, Ireland
| | - Catherine Stanton
- Teagasc Food Research Centre, Moorepark, Fermoy, Ireland
- APC Microbiome Ireland, Cork, Ireland
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Abstract
Genomic platforms are increasingly used to gain an understanding of how the immune system responds to cancer. In this chapter we describe steps applied in immunogenomic processing and data processing from multiple genomics platforms to enable study of immune response and the evaluation of candidate biomarkers. We also describe how publicly available web resources can be used to discover and evaluate candidate cancer immune biomarkers.
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Affiliation(s)
- Vésteinn Thorsson
- Institute for Systems Biology, 401 Terry Avenue North, Seattle, WA, USA.
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Kedaigle A, Fraenkel E. Turning omics data into therapeutic insights. Curr Opin Pharmacol 2018; 42:95-101. [PMID: 30149217 PMCID: PMC6204089 DOI: 10.1016/j.coph.2018.08.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/18/2018] [Accepted: 08/09/2018] [Indexed: 12/30/2022]
Abstract
Omics technologies have made it easier and cheaper to evaluate thousands of biological molecules at once. These advances have led to novel therapies approved for use in the clinic, elucidated the mechanisms behind disease-associated mutations, led to increased accuracy in disease subtyping and personalized medicine, and revealed novel uses and treatment regimes for existing drugs through drug repurposing and pharmacology studies. In this review, we summarize some of these milestones and discuss the potential of integrative analyses that combine multiple data types for further advances.
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Affiliation(s)
- Amanda Kedaigle
- Computational & Systems Biology Program and the Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Ernest Fraenkel
- Computational & Systems Biology Program and the Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
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