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Used as powerful chemical probes in Life science fundamental research, the application potential of new bioactive molecular entities includes but extends beyond their development as therapeutic drugs in pharmacology. In this review, we wish to point out the methodology of chemical libraries screening on living cells or purified proteins at the CMBA academic platform of Grenoble Alpes University, and strategies employed to further characterize the selected bioactive molecules by phenotypic profiling on human cells. Multiple application fields are concerned by the screening activity developed at CMBA with bioactive molecules previously selected for their potential as tools for fundamental research purpose, therapeutic candidates to treat cancer or infection, or promising compounds for production of bioenergy.

Phenotypic screens, in which chemical libraries are assayed on cells with the aim to isolate compounds that interfere with a given cell function, are a risky but powerful strategy to discover, in the same approach, new therapeutic targets and the compounds able to regulate them. With a strong experience of nearly 10 years in the field, we present the advantages of such an approach, the possible troubles and technical solutions. We also present in this paper a french network which has been recently built and that gather all the competencies needed for screening approaches.