Selective inhibitors of glutathione transferase P1 with trioxane structure as anticancer agents

Area of Science:

• Medicinal Chemistry
• Oncology
• Biochemistry

Background:

• Chemotherapy response in cancer patients is often limited by drug resistance.
• Overexpression of glutathione transferase P1 (GSTP1) in tumor cells is linked to poor prognosis and resistance to anticancer drugs.
• GSTP1 inhibition is a validated therapeutic strategy to combat chemoresistance.

Purpose of the Study:

• To design and synthesize novel 1,2,4-trioxane derivatives as potent and selective inhibitors of GSTP1.
• To evaluate the inhibitory activity and selectivity of the synthesized compounds against GSTP1.
• To establish preliminary structure-activity relationships (SAR) for further optimization.

Main Methods:

• Synthesis of 1,2,4-trioxane inhibitors via type II photooxygenation of allylic alcohols and subsequent acid-catalyzed peroxyacetalization.
• In vitro enzymatic assays to determine GSTP1 inhibition.
• Selectivity profiling against other human glutathione transferase classes (GSTA1 and GSTM2).

Main Results:

• A series of novel 1,2,4-trioxane compounds were successfully synthesized.
• The inhibitors demonstrated low micromolar to high nanomolar potency against GSTP1.
• High selectivity was achieved for GSTP1 over GSTA1 and GSTM2, indicating specificity.

Conclusions:

• The developed 1,2,4-trioxane derivatives are potent and selective inhibitors of GSTP1.
• These compounds represent a promising foundation for developing novel drug candidates to overcome cancer chemoresistance.
• Further lead optimization based on preliminary SAR could yield effective therapeutic agents.