4.6 Article

Integration of small RNAs from plasma and cerebrospinal fluid for classification of multiple sclerosis

期刊

FRONTIERS IN GENETICS
卷 13, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fgene.2022.1042483

关键词

multiple sclerosis (MS); data integration; MCIA; biomarkers; small RNAs; tRNA fragments; DNA methylation

资金

  1. Knut and Alice Wallenberg Foundation - National Bioinformatics Infrastructure Sweden (NBIS) at SciLifeLab
  2. Swedish Research Council(Vetenskapsradet)
  3. Swedish Association for Persons with Neurological Disabilities
  4. Swedish Brain Foundation
  5. Stockholm County Council (ALF project)
  6. European Union's Horizon 2020 research innovation programme [733161]
  7. European Research Council [818170]
  8. European Research Council (ERC) [818170] Funding Source: European Research Council (ERC)
  9. H2020 Societal Challenges Programme [733161] Funding Source: H2020 Societal Challenges Programme

向作者/读者索取更多资源

This study utilizes large-scale data processing and analysis to extract small RNA data from multiple sclerosis patients and neurological disease controls, and applies data integration methods to classify disease status. The findings demonstrate that small RNA data can be used to distinguish different disease stages and control groups, which is of great significance for early diagnosis and treatment.
Multiple Sclerosis (MS) is an autoimmune, neurological disease, commonly presenting with a relapsing-remitting form, that later converts to a secondary progressive stage, referred to as RRMS and SPMS, respectively. Early treatment slows disease progression, hence, accurate and early diagnosis is crucial. Recent advances in large-scale data processing and analysis have progressed molecular biomarker development. Here, we focus on small RNA data derived from cell-free cerebrospinal fluid (CSF), cerebrospinal fluid cells, plasma and peripheral blood mononuclear cells as well as CSF cell methylome data, from people with RRMS (n = 20), clinically/radiologically isolated syndrome (CIS/RIS, n = 2) and neurological disease controls (n = 14). We applied multiple co-inertia analysis (MCIA), an unsupervised and thereby unbiased, multivariate method for simultaneous data integration and found that the top latent variable classifies RRMS status with an Area Under the Receiver Operating Characteristics (AUROC) score of 0.82. Variable selection based on Lasso regression reduced features to 44, derived from the small RNAs from plasma (20), CSF cells (8) and cell-free CSF (16), with a marginal reduction in AUROC to 0.79. Samples from SPMS patients (n = 6) were subsequently projected on the latent space and differed significantly from RRMS and controls. On contrary, we found no differences between relapse and remission or between inflammatory and non-inflammatory disease controls, suggesting that the latent variable is not prone to inflammatory signals alone, but could be MS-specific. Hence, we here showcase that integration of small RNAs from plasma and CSF can be utilized to distinguish RRMS from SPMS and neurological disease controls.

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