Abstract: A device for searching a biomarker to be used for determining whether or not a first treatment has an effect on a disease, the biomarker search device includes: a first storage; a second storage storing; a third storage; a fourth storage; a signature molecular information detector; a regression analyzer; a network generator; and a biomarker determinator.

Abstract: An analysis method for using an analyzer to analyze consistency between data on the amount of reaction obtained by a predetermined treatment performed on a plurality of substances included in a specimen and a known pathway includes: the analyzer acquiring the data on the amount of reaction for a plurality of specimens; and the analyzer reading, from a storage stored with data on a known pathway including the substances as nodes, the data on the known pathway and determining consistency between the known pathway and the data on the amount of reaction. The known pathway is an undirected graph.

Abstract: A device for searching a biomarker to be used for determining whether or not a first treatment has an effect on a disease, the biomarker search device includes: a first storage; a second storage storing; a third storage; a fourth storage; a signature molecular information detector; a regression analyzer; a network generator; and a biomarker determinator.

Abstract: The present invention provides a method for searching for or identifying a useful gene logically, systematically, and efficiently in an extremely short time without largely relying on searcher's knowledge, experience, or the like and even without sequentially conducting gene disruption experiments as in conventional techniques of searching for a useful gene. The present invention also provides an apparatus for the method. Virtual gene clusters each comprising two or more genes are individually scored by summing the respective pieces of differential expression information (obtained using, for example, microarrays) of genomic genes on a per-cluster basis. On the basis of the obtained scores of the virtual gene clusters, a gene cluster containing a useful gene and the useful gene contained in the cluster are searched for.