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A validated single-cell-based strategy to identify diagnostic and therapeutic targets in complex diseases
Linköping University, Department of Clinical and Experimental Medicine, Division of Children's and Women's health. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Children's and Women's health. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Children's and Women's health. Linköping University, Faculty of Medicine and Health Sciences.
Reg Jonkoping Cty, Sweden.
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2019 (English)In: Genome Medicine, ISSN 1756-994X, E-ISSN 1756-994X, Vol. 11, article id 47Article in journal (Refereed) Published
Abstract [en]

Background

Genomic medicine has paved the way for identifying biomarkers and therapeutically actionable targets for complex diseases, but is complicated by the involvement of thousands of variably expressed genes across multiple cell types. Single-cell RNA-sequencing study (scRNA-seq) allows the characterization of such complex changes in whole organs.

Methods

The study is based on applying network tools to organize and analyze scRNA-seq data from a mouse model of arthritis and human rheumatoid arthritis, in order to find diagnostic biomarkers and therapeutic targets. Diagnostic validation studies were performed using expression profiling data and potential protein biomarkers from prospective clinical studies of 13 diseases. A candidate drug was examined by a treatment study of a mouse model of arthritis, using phenotypic, immunohistochemical, and cellular analyses as read-outs.

Results

We performed the first systematic analysis of pathways, potential biomarkers, and drug targets in scRNA-seq data from a complex disease, starting with inflamed joints and lymph nodes from a mouse model of arthritis. We found the involvement of hundreds of pathways, biomarkers, and drug targets that differed greatly between cell types. Analyses of scRNA-seq and GWAS data from human rheumatoid arthritis (RA) supported a similar dispersion of pathogenic mechanisms in different cell types. Thus, systems-level approaches to prioritize biomarkers and drugs are needed. Here, we present a prioritization strategy that is based on constructing network models of disease-associated cell types and interactions using scRNA-seq data from our mouse model of arthritis, as well as human RA, which we term multicellular disease models (MCDMs). We find that the network centrality of MCDM cell types correlates with the enrichment of genes harboring genetic variants associated with RA and thus could potentially be used to prioritize cell types and genes for diagnostics and therapeutics. We validated this hypothesis in a large-scale study of patients with 13 different autoimmune, allergic, infectious, malignant, endocrine, metabolic, and cardiovascular diseases, as well as a therapeutic study of the mouse arthritis model.

Conclusions

Overall, our results support that our strategy has the potential to help prioritize diagnostic and therapeutic targets in human disease.

Place, publisher, year, edition, pages
BioMed Central, 2019. Vol. 11, article id 47
Keywords [en]
Network tools; scRNA-seq; Biomarker and drug discovery
National Category
Medical Genetics
Identifiers
URN: urn:nbn:se:liu:diva-159568DOI: 10.1186/s13073-019-0657-3ISI: 000477887100001PubMedID: 31358043Scopus ID: 2-s2.0-85070062413OAI: oai:DiVA.org:liu-159568DiVA, id: diva2:1342460
Note

Funding Agencies|Swedish Cancer Foundation [17 0542, 15 0532]; European Commission [305033]; Swedish Research Council [2015-02575, 2015-03495, 2015-03807]; Clinical Cancer Research, Jonkoping, Sweden; Torsten Soderberg Foundation; East Gothia Regional Funding

Available from: 2019-08-13 Created: 2019-08-13 Last updated: 2019-11-18Bibliographically approved

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