Angular-Substituted [1,4]Thiazino[3,4-a]Isoquinolines: Biological Evaluation and In Silico Studies on DPP-IV...

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Drug Discovery

Background:

• Aryl-substituted pyrido[2,1-a]isoquinolines are known DPP IV inhibitors.
• Previous work established a synthetic route for related sulfur-containing analogues.

Purpose of the Study:

• To synthesize and evaluate novel [1,4]thiazino[3,4-a]isoquinoline analogues.
• To assess their dipeptidyl peptidase IV (DPP IV) inhibitory activity and cytotoxicity.
• To elucidate binding modes through molecular docking.

Main Methods:

• In vitro enzyme inhibition assays.
• Cytotoxicity assays.
• Computational methods: geometry optimization and molecular docking.

Main Results:

• Synthesized compounds were tested for DPP IV inhibition and cytotoxicity.
• Molecular docking indicated compounds interact with key DPP IV active site residues.
• Observed hydrogen bonds and hydrophobic interactions at selectivity cliffs.

Conclusions:

• The synthesized [1,4]thiazino[3,4-a]isoquinoline analogues exhibit potential as DPP IV inhibitors.
• Binding modes suggest a basis for future structure-activity relationship studies.
• These findings represent a foundational step for developing novel DPP IV inhibitors.