title: Characterizing gene expressions based on their temporal observations.
abstract: Temporal gene expression data are of particular interest to researchers as they contain rich information in characterization of gene function and have been widely used in biomedical studies. However, extracting information and identifying efficient treatment effects without loss of temporal information are still in problem. In this paper, we propose a method of classifying temporal gene expression curves in which individual expression trajectory is modeled as longitudinal data with changeable variance and covariance structure. The method, mainly based on generalized mixed model, is illustrated by a dense temporal gene expression data in bacteria. We aimed at evaluating gene effects and treatments. The power and time points of measurements are also characterized via the longitudinal mixed model. The results indicated that the proposed methodology is promising for the analysis of temporal gene expression data, and that it could be generally applicable to other high-throughput temporal gene expression analyses.
authors.affiliation: Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742, USA. songj88@umd.edu
authors.forename: Jiuzhou
authors.initials: J
authors.lastname: Song
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Fang
authors.forename: Kangmin
authors.initials: K
authors.lastname: Duan
mesh_terms: D003627:Data Interpretation, Statistical; D030541:Databases, Genetic; D015870:Gene Expression; D020869:Gene Expression Profiling / Q000379:methods*; D005798:Genes, Bacterial; D007501:Iron / Q000378:metabolism; D016014:Linear Models; D008957:Models, Genetic; D011550:Pseudomonas aeruginosa / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D013997:Time Factors
chemical_list: D007501:Iron