Exploring Schiff Bases Derived from 2-hydroxybenzaldehyde as Potential Anticancer Agents: Synthesis,...

Area of Science:

• Medicinal Chemistry
• Molecular Biology
• Cancer Research

Background:

• Chemotherapy resistance remains a significant challenge in cancer treatment.
• Schiff bases, characterized by the azomethine group, show promise in pharmaceutical applications.
• Developing novel anticancer agents is crucial for overcoming drug resistance.

Purpose of the Study:

• To synthesize and characterize novel Schiff base derivatives of 2-hydroxybenzaldehyde.
• To evaluate the cytotoxicity of these compounds against various cancer cell lines.
• To elucidate the apoptotic mechanism of the most potent compound, 8S3, in MCF-7 cells.

Main Methods:

• Synthesis and characterization of five Schiff base derivatives (8S1-8S5).
• Cytotoxicity screening using neutral red uptake assay against six cancer and two normal cell lines.
• Apoptosis mechanism evaluation of 8S3 involving cell cycle analysis, mitochondrial membrane potential (MMP) assessment, reactive oxygen species (ROS) measurement, caspase activity, MAPK pathway gene expression analysis, and in silico studies.

Main Results:

• Compound 8S3 demonstrated significant cytotoxicity against cancer cell lines.
• Treatment with 8S3 induced cell cycle arrest at the sub-G0/G1 phase and disrupted MMP.
• Gene expression analysis revealed significant modulation of the mitogen-activated protein kinase (MAPK) signaling pathway, with 30 genes upregulated and 10 downregulated.
• Apoptosis was induced in a ROS-independent manner.

Conclusions:

• Compound 8S3 induces apoptosis through modulation of the MAPK pathway and mitochondrial dysfunction.
• The findings highlight 8S3's potential to overcome chemoresistance by targeting key survival MAPK pathways.
• 8S3 represents a promising candidate for the development of novel anti-cancer therapeutics.