Chromosome preference of disease genes and vectorization for the prediction of non-coding disease genes
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Hui Peng1, Chaowang Lan1, Yuansheng Liu1, Tao Liu2, Michael Blumenstein3 and Jinyan Li1
1Advanced Analytics Institute & Centre for Health Technologies, University of Technology Sydney, Broadway, NSW, Australia
2Centre for Childhood Cancer Research, University of New South Wales, Sydney, Kensington, NSW, Australia
3School of Software, University of Technology Sydney, Broadway, NSW, Australia
Jinyan Li, email: Jinyan.Li@uts.edu.au
Keywords: chromosome preference, vectorization, long noncoding RNA
Received: April 23, 2017 Accepted: July 19, 2017 Published: August 24, 2017
Disease-related protein-coding genes have been widely studied, but disease-related non-coding genes remain largely unknown. This work introduces a new vector to represent diseases, and applies the newly vectorized data for a positive-unlabeled learning algorithm to predict and rank disease-related long non-coding RNA (lncRNA) genes. This novel vector representation for diseases consists of two sub-vectors, one is composed of 45 elements, characterizing the information entropies of the disease genes distribution over 45 chromosome substructures. This idea is supported by our observation that some substructures (e.g., the chromosome 6 p-arm) are highly preferred by disease-related protein coding genes, while some (e.g., the 21 p-arm) are not favored at all. The second sub-vector is 30-dimensional, characterizing the distribution of disease gene enriched KEGG pathways in comparison with our manually created pathway groups. The second sub-vector complements with the first one to differentiate between various diseases. Our prediction method outperforms the state-of-the-art methods on benchmark datasets for prioritizing disease related lncRNA genes. The method also works well when only the sequence information of an lncRNA gene is known, or even when a given disease has no currently recognized long non-coding genes.
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