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Towards a data-integrated cell
ID Malod-Dognin, Noël (Author), ID Petschnigg, Julia (Author), ID Windels, Sam F. L. (Author), ID Povh, Janez (Author), ID Hemmingway, Harry (Author), ID Ketteler, Robin (Author), ID Pržulj, Nataša (Author)

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Abstract
We are increasingly accumulating molecular data about a cell. The challenge is how to integrate them within a unified conceptual and computational framework enabling new discoveries. Hence, we propose a novel, data-driven concept of an integrated cell, iCell. Also, we introduce a computational prototype of an iCell, which integrates three omics, tissue-specific molecular interaction network types. We construct iCells of four cancers and the corresponding tissue controls and identify the most rewired genes in cancer. Many of them are of unknown function and cannot be identified as different in cancer in any specific molecular network. We biologically validate that they have a role in cancer by knockdown experiments followed by cell viability assays. We find additional support through Kaplan-Meier survival curves of thousands of patients. Finally, we extend this analysis to uncover pan-cancer genes. Our methodology is universal and enables integrative comparisons of diverse omics data over cells and tissues.

Language:English
Keywords:non-negative matrix factorization, data integration, cancer-related genes, pan-cancer genes, integrated cell, biological networks
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Author Accepted Manuscript
Year:2019
Number of pages:f. 1-13
Numbering:[Vol.] 10
PID:20.500.12556/RUL-106423 This link opens in a new window
UDC:576(045)
ISSN on article:2041-1723
DOI:10.1038/s41467-019-08797-8 This link opens in a new window
COBISS.SI-ID:16484379 This link opens in a new window
Publication date in RUL:22.02.2019
Views:1526
Downloads:697
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Secondary language

Language:Slovenian
Abstract:
Človeštvo vse bolj kopiči molekularne podatke o celicah, pri tem pa nastaja vedno večji izziv, kako jih vključiti v enoten konceptualni in računalniški okvir, ki bi omogočil nova odkritja. V članku predlagamo nov, na podatkih temelječ koncept integrirane celice, iCell. Prav tako uvajamo računski prototip take celice, ki združuje tri vrste omičnih podatkov, ki so tkivno specifični in se nanašajo na omrežja molekulskih povezav. Predstavimo konstrukcijo iCell na osnovi tkiv štirih vrst raka in ustreznih zdravih tkiv za potrebe kontrolnih skupin in identificiramo gene, ki so pri raku najbolj povezani z drugimi geni. Mnogi od njih imajo neznane funkcije v celici in jih v nobenem posamičnem molekularnem omrežju ni mogoče opredeliti kot statistično izstopajoče pri rakavih obolenjih. Njihovo vlogo pri raku biološko potrdimo s t.i. knockdown poskusi, ki jim sledijo še testi sposobnosti preživetja celic. Dodatno podporo našim ugotovitvam najdemo tudi v Kaplan-Meierjeve krivuljah preživetja več tisoč bolnikov. Na koncu analizo razširimo na iskanje pomembnih genov, ki so skupni več rakavim obolenjem. Naša metodologija je univerzalna in omogoča integrativne primerjave različnih omičnih podatkovnih virov preko celic in tkiv.

Keywords:nenegativna matrična faktorizacija, povezovanje podatkov, geni, povezani z rakom, vserakavi geni, povezana celica, biološka omrežja

Projects

Funder:ARRS - Slovenian Research Agency
Project number:J1-8155, P2-0256
Name:Zlivanje biomedicinskih podatkov z uporabo nenegativne matričnetri-faktorizacije, Konstruiranje

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