Novel amidrazone derivatives: Design, synthesis and activity evaluation

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Biochemistry

Background:

• Acid-sensing ion channel 1a (ASIC1a) plays a crucial role in the pathogenesis of tissue acidification diseases.
• Rheumatoid arthritis is a significant condition associated with tissue acidification.

Purpose of the Study:

• To synthesize and evaluate novel 6-styryl-naphthalene-2-amidrazone derivatives as potential ASIC1a inhibitors.
• To investigate the inhibitory effects of these compounds on acid-induced calcium ion ([Ca2+]i) elevation in articular chondrocytes.

Main Methods:

• Synthesis of a series of 6-styryl-naphthalene-2-amidrazone derivatives.
• Evaluation of ASIC1a inhibitory activity by measuring [Ca2+]i elevation in acid-induced articular chondrocytes.

Main Results:

• Compound 5e demonstrated the most potent activity in inhibiting [Ca2+]i elevation.
• The synthesized derivatives showed potential as ASIC1a inhibitors.

Conclusions:

• The novel amidrazone derivatives, particularly compound 5e, show promise for targeting ASIC1a.
• These findings may offer new therapeutic strategies for tissue acidification diseases, including rheumatoid arthritis.