Mathematical analysis for the estimation of changes in the level of gene expression
    28.
    发明公开
    Mathematical analysis for the estimation of changes in the level of gene expression 有权
    在基因表达水平变化的评估数学分析

    公开(公告)号:EP1630709A3

    公开(公告)日:2006-06-14

    申请号:EP05077415.7

    申请日:2000-05-25

    IPC分类号: G06F19/00

    CPC分类号: G06F19/20

    摘要: The present invention relates to a highly accurate and reproducible mathematically-based methodology for quantifying the levels of differential gene expression from microassay protocols. Specifically, the present invention provides a simple deductive approach, grounded in a Bayesian framework, to circumvent the heuristic-based limitation of previous methodologies. Rather than seeking a point-estimate of the fold-change of the level of gene expression, the present invention utilizes the derivation of mathematical formula to determine the a posteriori distribution of all the fold-changes of differential gene expression which may be inferred from the given measurements. From this a posteriori distribution the following information may be obtained: (i) an estimator for the fold-change of the level of gene expression; (ii) confidence limits for the fold-change, at any given confidence level; and (iii) a P-value for assessing the statistical significance of change. The present invention also possesses the advantage that fold-change estimates and confidence limits may even be assigned to signal pairs where both signals are zero or negative, without resorting to heuristic thresholds.