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An Eighteen Serum Cytokine Signature for Discriminating Glioma from Normal Healthy Individuals

Nijaguna, Mamatha B and Patil, Vikas and Hegde, Alangar S and Chandramouli, Bangalore A and Arivazhagan, Arimappamagan and Santosh, Vani and Somasundaram, Kumaravel (2015) An Eighteen Serum Cytokine Signature for Discriminating Glioma from Normal Healthy Individuals. In: PLOS ONE, 10 (9).

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Official URL: http://dx.doi.org/10.1371/journal.pone.0137524


Glioblastomas (GBM) are largely incurable as they diffusely infiltrate adjacent brain tissues and are difficult to diagnose at early stages. Biomarkers derived from serum, which can be obtained by minimally invasive procedures, may help in early diagnosis, prognosis and treatment monitoring. To develop a serum cytokine signature, we profiled 48 cytokines in sera derived from normal healthy individuals (n = 26) and different grades of glioma patients (n = 194). We divided the normal and grade IV glioma/GBM serum samples randomly into equal sized training and test sets. In the training set, the Prediction Analysis for Microarrays (PAM) identified a panel of 18 cytokines that could discriminate GBM sera fromnormal sera with maximum accuracy (95.40%) and minimum error (4.60%). The 18-cytokine signature obtained in the training set discriminated GBM sera from normal sera in the test set as well (accuracy 96.55%; error 3.45%). Interestingly, the 18-cytokine signature also differentiated grade II/Diffuse Astrocytoma (DA) and grade III/Anaplastic Astrocytoma (AA) sera from normal sera very efficiently (DA vs. normal-accuracy 96.00%, error 4.00%; AA vs. normal-accuracy 95.83%, error 4.17%). Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis using 18 cytokines resulted in the enrichment of two pathways, cytokine-cytokine receptor interaction and JAK-STAT pathways with high significance. Thus our study identified an 18-cytokine signature for distinguishing glioma sera fromnormal healthy individual sera and also demonstrated the importance of their differential abundance in glioma biology.

Item Type: Journal Article
Publication: PLOS ONE
Additional Information: Copy right for this article belongs to the PUBLIC LIBRARY SCIENCE, 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 30 Oct 2015 07:17
Last Modified: 30 Oct 2015 07:17
URI: http://eprints.iisc.ac.in/id/eprint/52599

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