Phototoxicity─Medicinal Chemistry Strategies for Risk Mitigation in Drug Discovery

Area of Science:

• Medicinal Chemistry
• Drug Discovery
• Pharmacology

Background:

• Phototoxicity is a significant safety concern in pharmaceutical research, potentially halting promising drug candidate development.
• Regulatory standards for photosafety evaluation necessitate proactive strategies to address phototoxicity liabilities.

Purpose of the Study:

• To provide an overview of mitigation strategies for phototoxicity in medicinal chemistry during lead optimization.
• To highlight the role of structural modifications in addressing phototoxicity liabilities.
• To present a guidance tool for medicinal chemists managing phototoxicity risks.

Main Methods:

• Literature review of strategies employed in medicinal chemistry for phototoxicity mitigation.
• Analysis of structure-activity relationships related to phototoxicophores.
• Description of in silico tools and structure alerts for phototoxicity assessment.

Main Results:

• Structural modification is a key strategy for mitigating phototoxicity.
• In silico methods and structure alerts aid in predicting and managing phototoxicity risks.
• A flowchart is proposed to guide medicinal chemists through phototoxicity risk assessment.

Conclusions:

• Medicinal chemists can effectively manage phototoxicity through informed structural modifications and the use of computational tools.
• Proactive assessment and mitigation of phototoxicity are crucial for successful drug development.
• The presented guidance tool aids in navigating regulatory requirements for photosafety evaluation.