Neural Network Normalization (N3) to Uncover the Differential Signal of cDNA Microarrays

  • Authors:
  • Chao Deng;Denong Wang

  • Affiliations:
  • Columbia Genome Center, College of Physicians &/ Surgeons, Columbia University, 1150 St. Nicholas Ave., Rm506, New York, NY 10032, USA;Columbia Genome Center, College of Physicians &/ Surgeons, Columbia University, 1150 St. Nicholas Ave., Rm506, New York, NY 10032, USA&semi/ Departments of Genetics, Neurology and Neurological ...

  • Venue:
  • Journal of VLSI Signal Processing Systems
  • Year:
  • 2004

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Abstract

cDNA microarray is a high throughput technology for gene expression analysis. Differing from conventional molecular approaches, which detect molecular targets on a one-by-one basis, cDNA microarray monitors gene expressions of living organisms on a global scale. However, the signal detected by a microarray assay contains a significant amount of noise. Certain types of noise are introduced by the systematic variations that are hardly avoidable by experimental approaches. Significant biological information can only be recognized after the original or raw data sets of microarray assay have been effectively processed. We report here our progress in establishing a Neural Network Normalization (N3) approach to cDNA microarray data processing. With the strong learning ability of the artificial neural network, the trained N3 algorithm is capable of the detection and suppression of systematic variations during microarray data processing and has plasticity in handling both linear and non-linear microarray data sets. The potential of this system in signal processing for other types of biochips, including nucleic acid and non-nucleic acid-based biochips, is yet to be explored.