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BMC Cancer
Published in: BMC Cancer 1/2010

Open Access 01-12-2010 | Research article

High-throughput miRNA profiling of human melanoma blood samples

Authors: Petra Leidinger, Andreas Keller, Anne Borries, Jörg Reichrath, Knuth Rass, Sven U Jager, Hans-Peter Lenhof, Eckart Meese

Published in: BMC Cancer | Issue 1/2010

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Abstract

Background

MicroRNA (miRNA) signatures are not only found in cancer tissue but also in blood of cancer patients. Specifically, miRNA detection in blood offers the prospect of a non-invasive analysis tool.

Methods

Using a microarray based approach we screened almost 900 human miRNAs to detect miRNAs that are deregulated in their expression in blood cells of melanoma patients. We analyzed 55 blood samples, including 20 samples of healthy individuals, 24 samples of melanoma patients as test set, and 11 samples of melanoma patients as independent validation set.

Results

A hypothesis test based approch detected 51 differentially regulated miRNAs, including 21 miRNAs that were downregulated in blood cells of melanoma patients and 30 miRNAs that were upregulated in blood cells of melanoma patients as compared to blood cells of healthy controls. The tets set and the independent validation set of the melanoma samples showed a high correlation of fold changes (0.81). Applying hierarchical clustering and principal component analysis we found that blood samples of melanoma patients and healthy individuals can be well differentiated from each other based on miRNA expression analysis. Using a subset of 16 significant deregulated miRNAs, we were able to reach a classification accuracy of 97.4%, a specificity of 95% and a sensitivity of 98.9% by supervised analysis. MiRNA microarray data were validated by qRT-PCR.

Conclusions

Our study provides strong evidence for miRNA expression signatures of blood cells as useful biomarkers for melanoma.
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Metadata
Title
High-throughput miRNA profiling of human melanoma blood samples
Authors
Petra Leidinger
Andreas Keller
Anne Borries
Jörg Reichrath
Knuth Rass
Sven U Jager
Hans-Peter Lenhof
Eckart Meese
Publication date
01-12-2010
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2010
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-10-262

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