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Iterative normalization of cDNA microarray data

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5 Author(s)
Yue Wang ; Dept. of Electr. Eng. & Comput. Sci., Catholic Univ. of America, Washington, DC, USA ; Jianping Lu ; Lee, R. ; Zhiping Gu
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Describes an approach to normalizing microarray expression data. The novel feature is to unify the tasks of estimating normalization coefficients and identifying the control gene set. Unification is realized by constructing a window function over the scatter plot defining the subset of constantly expressed genes and by affecting optimization using an iterative procedure. The structure of window function gates contributions to the control gene set used to estimate normalization coefficients. This window measures the consistency of the matched neighborhoods in the scatter plot and provides a means of rejecting control gene outliers. The recovery of normalizational regression and control gene selection are interleaved and are realized by applying coupled operations to the mean square error function. In this way, the two processes bootstrap one another. We evaluate the technique on real microarray data from breast cancer cell lines and complement the experiment with a data cluster visualization study.

Published in:

Information Technology in Biomedicine, IEEE Transactions on  (Volume:6 ,  Issue: 1 )

Date of Publication:

March 2002

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