Sulfonamide-Based Azaheterocyclic Schiff Base Derivatives as Potential Carbonic Anhydrase Inhibitors: Synthesis, Cytotoxicity, and Enzyme Inhibitory Kinetics

BioMed Research International
Mujahid AbasMuhammad Hassham Hassan Bin Asad

Abstract

A series of sulfonamide-bearing azaheterocyclic Schiff base derivatives 3(a-j) were synthesized as carbonic anhydrase inhibitors. The substituted benzene sulfonyl chlorides 1(a-d) were reacted with N2H4 to get aromatic sulfonyl hydrazides 2(a-d). The intermediate hydrazides 2(a-d) were treated with substituted aldehydes to afford azaheterocyclic sulfonamide Schiff bases 3(a-j). The spectral data of synthesized compounds confirmed the formation of the final products. The inhibitory effects of 3(a-j) on carbonic anhydrase activity were determined, and it was found that derivative 3c exhibited the most potent activity with IC500.84 ± 0.12 μM among all other derivatives and is also more active than standard acetazolamide (IC500.91 ± 0.12). The enzyme inhibitory kinetics results determined by Lineweaver-Burk plots revealed that compound 3c inhibits the enzyme by noncompetitive mode of inhibition with Ki value 8.6 μM. The molecular docking investigations of the synthesized analogues 3(a-j) were evaluated which assured that synthesized compounds bind well inside the active binding site of the target enzyme. Cytotoxicity on human keratinocyte (HaCaT) and MCF-7 cell lines was performed, and it was found that most of the synthesized anal...Continue Reading

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Methods Mentioned

BETA
Assay
ELISA

Software Mentioned

Schrödinger Suite
GraphPad Prism
Maestro interface
Maestro

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