alexa BiDCG: A New Method For Discovering Global Features Of DNA | 22230
ISSN: 2155-6180

Journal of Biometrics & Biostatistics
Open Access

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3rd International Conference & Exhibition on Biometrics & Biostatistics

Chia-Pei Chen, Patrice Koehl, Hsieh Fushing and Rob Atwill
Accepted Abstracts: J Biom Biostat
DOI: 10.4172/2155-6180.S1.022
Abstract
Biclustering techniques have become very popular in cancer genetics studies, as they are tools that are expected to connect phenotypes to genotypes, i.e., to identify subgroups of cancer patients based on the fact that they share similar gene expression patterns as well as to identify subgroups of genes that are specific to these subtypes of cancer and therefore could serve as biomarkers. In this paper, a new approach for identifying such relationships or biclusters between patients and gene expression profiles is being proposed. This method, named biDCG, rests on two key concepts. First, it uses a new clustering technique, DCG-tree that generates ultrametric topological spaces that capture the geometries of both the patient data set and the gene data set. Second, it optimizes the definitions of bicluster membership through an iterative two-way reclustering procedure in which patients and genes are reclustered in turn, based respectively on subsets of genes and patients defined in the previous round. Author has validated biDCG on simulated and real data. Based on the simulated data we have shown that biDCG compares favorably to other biclustering techniques applied to cancer genomics data. The results on the real data sets have shown that biDCG is able to retrieve relevant biological information.
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