Toxicity and structure-activity relationship (SAR) of α,β-dehydroamino acids against human cancer cell lines

Area of Science:

• Medicinal Chemistry
• Cancer Biology
• Toxicology

Background:

• Screening of N-protected dehydroamino acid derivatives for anticancer properties.
• Evaluating toxicological profiles across various human cancer cell lines.

Purpose of the Study:

• Identify novel anticancer agents from dehydroamino acid derivatives.
• Characterize the mechanism of cell death induced by promising compounds.

Main Methods:

• In vitro screening of dehydroalanine, dehydroaminobutyric acid, and dehydrophenylalanine derivatives against lung, gastric, and neuroblastoma cell lines.
• Determination of IC50 values and assessment of toxicity in cancer and non-cancer cells.
• Investigation of apoptosis induction, mitochondrial membrane potential loss, and caspase activation.

Main Results:

• N-protected dehydrophenylalanine and dehydroaminobutyric acid derivatives showed low toxicity.
• N-protected dehydroalanines exhibited significant toxicity, with gastric (AGS) and neuroblastoma (SH-SY5Y) cells being more vulnerable than lung (A549) cells.
• Four α,β-dehydroalanine derivatives induced apoptosis via mitochondrial membrane potential loss and caspase activation in AGS and SH-SY5Y cells, with low toxicity in non-cancer cells.

Conclusions:

• α,β-Dehydroalanine derivatives demonstrate selective toxicity towards cancer cells.
• These compounds induce apoptosis through mitochondrial pathways and caspase activation.
• Dehydroalanine derivatives represent a promising class of compounds for future anticancer drug development.