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Activity cliffs in drug discovery: Dr Jekyll or Mr Hyde?

Authors
Journal
Drug Discovery Today
1359-6446
Publisher
Elsevier
Identifiers
DOI: 10.1016/j.drudis.2014.02.003
Disciplines
  • Chemistry
  • Computer Science

Abstract

The impact activity cliffs have on drug discovery is double-edged. For instance, whereas medicinal chemists can take advantage of regions in chemical space rich in activity cliffs, QSAR practitioners need to escape from such regions. The influence of activity cliffs in medicinal chemistry applications is extensively documented. However, the ‘dark side’ of activity cliffs (i.e. their detrimental effect on the development of predictive machine learning algorithms) has been understudied. Similarly, limited amounts of work have been devoted to propose potential solutions to the drawbacks of activity cliffs in similarity-based approaches. In this review, the duality of activity cliffs in medicinal chemistry and computational approaches is addressed, with emphasis on the rationale and potential solutions for handling the ‘ugly face’ of activity cliffs.

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