Harnessing antimalarial chemical space: the way forward

Area of Science:

• Medicinal Chemistry
• Cheminformatics
• Drug Discovery

Background:

• Malaria poses a significant global health threat, exacerbated by growing resistance to existing antimalarial drugs.
• Potent antimalarials are known to reside within a specific antimalarial chemical space (AMCS), defined by defined physicochemical properties.

Purpose of the Study:

• To evaluate the prevalence of AMCS-compliant compounds in commercial libraries.
• To demonstrate the utility of AMCS in rational drug discovery, including drug repurposing and lead optimization.
• To explore the potential of AMCS in developing cost-effective and resistance-resilient antimalarials.

Main Methods:

• Analysis of compound libraries against defined AMCS property cutoffs.
• Literature review of successful AMCS-guided antimalarial drug development and repurposing case studies.
• Discussion of computational methodologies and limitations in defining and applying AMCS.

Main Results:

• Only 6-8% of compounds in representative commercial libraries meet AMCS criteria, highlighting the need for pre-screening.
• Clinically used antimalarials and repurposed oral drugs largely conform to AMCS, validating its role in rational drug design.
• AMCS facilitates scaffold modification for lead optimization and the development of multimodal antimalarials.

Conclusions:

• The antimalarial chemical space (AMCS) is crucial for identifying effective and novel antimalarial compounds.
• Leveraging AMCS principles can enhance drug repurposing efforts and streamline lead optimization, leading to more cost-effective treatments.
• Despite limitations, AMCS offers a promising strategy for discovering malaria drugs that overcome resistance and address economic challenges.