1,2,3,4-Dithiadiazole Derivative 3-(4-Nitrophenyl)-5-Phenyl-3H-1,2,3,4-Dithiadiazole-2-Oxide Affects Both STIM1- and...

Area of Science:

• Biochemistry
• Cell Biology
• Pharmacology

Background:

• Store-operated calcium entry (SOCE) is vital for cellular functions.
• Dysregulation of SOCE is implicated in neurodegenerative, oncological, and autoimmune diseases.
• Inhibitors of SOCE show therapeutic potential, targeting neuroprotection and metastasis suppression.

Purpose of the Study:

• To investigate the specificity of a 1,2,3,4-dithiadiazole derivative on STIM1- and STIM2-mediated SOCE.
• To evaluate the compound 3-(4-nitrophenyl)-5-phenyl-3H-1,2,3,4-dithiadiazole-2-oxide as a modulator of SOCE.

Main Methods:

• Utilized STIM1 and STIM2 proteins to activate store-operated calcium channels.
• Assessed the inhibitory effect of the dithiadiazole derivative on calcium entry.
• Determined the compound's specificity towards STIM1- and STIM2-activated channels.

Main Results:

• The dithiadiazole derivative acts as a negative modulator of SOCE.
• The compound effectively blocks calcium entry through store-operated channels.
• Specificity analysis confirmed blockade of both STIM1- and STIM2-mediated calcium entry.

Conclusions:

• The studied 1,2,3,4-dithiadiazole derivative is a potent inhibitor of SOCE.
• This compound blocks calcium influx via channels activated by both STIM1 and STIM2.
• These findings support the potential of dithiadiazole derivatives as therapeutic agents targeting SOCE-related diseases.