Abstract: The present invention concerns the field of integrative analysis of molecular interactions in a biological system. In particular, it pertains to a method for obtaining a dynamic model of a molecular interaction network in a biological system that allows analysis of said interactions when a stimulus is applied to the dynamic model, with a view in particular of hierarchizing biological molecules or selecting therapeutic targets in respect of a given biological problem, in particular to define a therapeutic action to be applied to said molecules. The invention also pertains to an informatics system for producing a dynamic model of a molecular interaction network in a biological system, and analyzing said molecular interactions when a stimulus is applied to the dynamic model, the informatics system comprising at least one central data processing unit connected to at least one quantitative experimental database.

Abstract: The present invention relates to compositions and methods for nucleic acid analyses. More particularly, this invention provides compositions and methods for differential gene expression analyses on nucleic acid arrays. This invention discloses more preferably differential gene expression analyses on nucleic acid arrays using nucleic acid samples having distinct radioactive labels. Even more particularly, this invention relates to compositions and methods for nucleic acid analysis, comprising contacting at least two differently radiolabelled nucleic acid samples on a nucleic acid array, and detecting (or comparing or quantifying) hybrids formed between the nucleic acids of the samples and the nucleic acid array. The present invention can be used to detect or monitor gene expression or to compare gene expression (e.g., differential gene expression screening), for instance, and is suitable for use in research, diagnostic and many pharmacogenomics applications, for instance.

Abstract: The present invention concerns micro-arrays, their preparation and their uses. In particular, it concerns micro-arrays composed of nucleic acids immobilised on a support by means of arms in arborescent form and/or arms carrying a negative charge and/or directly on the supports carrying a negative charge. The methods and micro-arrays according to the present invention can be used for genetic expression detection or analysis, for research of genes of interest, or for diagnostic applications, for example.