Quantitative structure-cytotoxicity relationship of phenylpropanoid amides

Area of Science:

• Medicinal Chemistry
• Computational Chemistry
• Pharmacology

Background:

• 12 phenylpropanoid amides were analyzed for biological activities including cytotoxicity, tumor selectivity, and anti-HIV effects.
• Quantitative structure-activity relationship (QSAR) analysis was employed to understand the relationship between chemical structure and biological activity.

Purpose of the Study:

• To investigate the biological activities of 12 phenylpropanoid amides.
• To establish QSAR models for predicting cytotoxicity, tumor selectivity, and anti-HIV activity.
• To identify key molecular descriptors influencing the biological effects of these compounds.

Main Methods:

• Cytotoxicity was assessed using the MTT assay against oral squamous cell carcinoma (OSCC) and normal oral cell lines.
• Tumor selectivity was calculated as the ratio of CC50 values against normal cells to OSCC cells.
• Physicochemical, structural, and quantum-chemical parameters were computed using LowModeMD and DFT methods.

Main Results:

• Phenylpropanoid amides exhibited moderate cytotoxicity against both normal and OSCC cells.
• N-Caffeoyl derivatives showed higher tumor selectivity.
• Cytotoxicity correlated with electrostatic interactions (normal cells) and molecular size/energy (tumor cells).
• Tumor selectivity was linked to molecular size and electrostatic potential.

Conclusions:

• Molecular size, shape, and electrostatic interactions are crucial for predicting the tumor selectivity of phenylpropanoid amides.
• These parameters can guide the design of more effective and selective anticancer agents.
• QSAR analysis provides valuable insights into the structure-activity relationships of this compound class.