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Review
. 2011 Jun 24;10(7):507-19.
doi: 10.1038/nrd3480.

How were new medicines discovered?

David C Swinney  1 , Jason Anthony
Affiliations
Review

How were new medicines discovered?

David C Swinney et al. Nat Rev Drug Discov. .

Abstract

Preclinical strategies that are used to identify potential drug candidates include _target-based screening, phenotypic screening, modification of natural substances and biologic-based approaches. To investigate whether some strategies have been more successful than others in the discovery of new drugs, we analysed the discovery strategies and the molecular mechanism of action (MMOA) for new molecular entities and new biologics that were approved by the US Food and Drug Administration between 1999 and 2008. Out of the 259 agents that were approved, 75 were first-in-class drugs with new MMOAs, and out of these, 50 (67%) were small molecules and 25 (33%) were biologics. The results also show that the contribution of phenotypic screening to the discovery of first-in-class small-molecule drugs exceeded that of _target-based approaches - with 28 and 17 of these drugs coming from the two approaches, respectively - in an era in which the major focus was on _target-based approaches. We postulate that a _target-centric approach for first-in-class drugs, without consideration of an optimal MMOA, may contribute to the current high attrition rates and low productivity in pharmaceutical research and development.

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