5-Functionalized indazoles as glucocorticoid receptor agonists

Area of Science:

• Medicinal Chemistry
• Molecular Pharmacology
• Drug Discovery

Background:

• Glucocorticoid receptor (GR) agonists are crucial therapeutics.
• Developing selective GR modulators is a key challenge.
• Targeting specific GR mechanisms, like transrepression, offers therapeutic advantages.

Purpose of the Study:

• To synthesize and characterize novel indazole-based glucocorticoid receptor agonists.
• To explore structure-activity relationships (SAR) for improved affinity and selectivity.
• To evaluate in vivo efficacy of promising compounds.

Main Methods:

• Design and synthesis of an indazole-based chemical series.
• In vitro assays to determine binding affinity and selectivity for the glucocorticoid receptor.
• In vivo testing using a lipopolysaccharide (LPS)-induced tumor necrosis factor-alpha (TNFα) mouse model.

Main Results:

• A series of indazole-based compounds were synthesized.
• Several compounds exhibited nanomolar affinity for the glucocorticoid receptor.
• Compounds showed selectivity for the transrepression mechanism over transactivation.
• Compound 28 demonstrated significant in vivo efficacy in reducing TNFα levels.

Conclusions:

• Indazole scaffolds are suitable for developing potent glucocorticoid receptor agonists.
• The developed compounds exhibit promising selectivity for the transrepression pathway.
• Compound 28 represents a potential therapeutic candidate for inflammatory conditions.