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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/10615

Title: Informative or Noninformative Calls for Gene Expression: A Latent Variable Approach
Authors: Kasim, Adetayo
Lin, Dan
Van Sanden, Suzy
Clevert, Djork-Arne
Bijnens, L
Goehlmann, Hinrich
Amaratunga, Dhammika
Hochreiter, Sepp
Shkedy, Ziv
Talloen, Willem
Issue Date: 2010
Abstract: The strength and weakness of microarray technology can be attributed to the enormous amount of information it is generating. To fully enhance the benefit of microarray technology for testing differentially expressed genes and classification, there is a need to minimize the amount of irrelevant genes present in microarray data. A major interest is to use probe-level data to call genes informative or noninformative based on the trade-off between the array-to-array variability and the measurement error. Existing works in this direction include filtering likely uninformative sets of hybridization (FLUSH; Calza et al., 2007) and I/NI calls for the exclusion of noninformative genes using FARMS (I/NI calls; Talloen et al., 2007; Hochreiter et al., 2006). In this paper, we propose a linear mixed model as a more flexible method that performs equally good as I/NI calls and outperforms FLUSH. We also introduce other criteria for gene filtering, such as, R2 and intra-cluster correlation. Additionally, we include some objective criteria based on likelihood ratio testing, the Akaike information criteria (AIC; Akaike, 1973) and the Bayesian information criterion (BIC; Schwarz, 1978). Based on the HGU-133A Spiked-in data set, it is shown that the linear mixed model approach outperforms FLUSH, a method that filters genes based on a quantile regression. The linear model is equivalent to a factor analysis model when either the factor loadings are set to a constant with the variance of the latent factor equal to one, or if the factor loadings are set to one together with unconstrained variance of the latent factor. Filtering based on conditional variance calls a probe set informative when the intensity of one or more probes is consistent across the arrays, while filtering using R2 or intra-cluster correlation calls a probe set informative only when average intensity of a probe set is consistent across the arrays. Filtering based on likelihood ratio test AIC and BIC are less stringent compared to the other criteria.
Notes: [Kasim, Adetayo; Lin, Dan; Van Sanden, Suzy; Shkedy, Ziv] Univ Hasselt, Diepenbeek, Belgium. [Kasim, Adetayo; Lin, Dan; Van Sanden, Suzy; Shkedy, Ziv] Katholieke Univ Leuven, Louvain, Belgium. [Clevert, Djork-Arne; Hochreiter, Sepp] Johannes Kepler Univ Linz, Linz, Austria. [Clevert, Djork-Arne] Charite Univ Med Berlin, Berlin, Germany. [Bijnens, Luc; Goehlmann, Hinrich; Talloen, Willem] Janssen Pharmaceut NV, Beerse, Belgium. [Amaratunga, Dhammika] Johnson & Johnson Pharmaceut Res & Dev, Raritan, NJ USA.
URI: http://hdl.handle.net/1942/10615
DOI: 10.2202/1544-6115.1460
ISI #: 000274198200003
ISSN: 1544-6115
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

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