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UVA-induced effects of 2,6-disubstituted 4-anilinoquinazolines on cancer cell lines

Paper ID Volume ID Publish Year Pages File Format Full-Text
29388 44380 2016 12 PDF Available
Title
UVA-induced effects of 2,6-disubstituted 4-anilinoquinazolines on cancer cell lines
Abstract

•Photoactivation of molecular oxygen in the presence of 4-anilinoquinazolines•Indirect EPR techniques confirmed photoinduced generation of O2− and 1O2.•Derivatives decreased the viability of cancer cell lines L1210, HeLa and HT-29.•UVA irradiation increased cytotoxicity of 4-anilinoquinazolines.•DNA damage and apoptosis in L1210 cells found for N,2-diphenyl-quinazolin-4-amine

Five 2,6-substituted 4-anilinoquinazolines were evaluated for their ability to generate superoxide radical anion and singlet oxygen upon UVA irradiation and to induce cytotoxic/phototoxic effects on cancer cell lines L1210, HeLa and HT-29. The formation of radical intermediates, especially reactive oxygen species, upon UVA photoexcitation of the studied derivatives was monitored by indirect techniques of EPR spectroscopy. For all 4-anilinoquinazolines the photoinduced generation of superoxide radical anion was evidenced using spin trapping agent 5,5-dimethyl-1-pyrroline N-oxide, and the presence of 1O2 was detected by the oxidation of 4-hydroxy-2,2,6,6-tetramethylpiperidine to the paramagnetic species 4-hydroxy-2,2,6,6-tetramethylpiperidine N-oxyl. The confirmed photoinduced activation of molecular oxygen via both Type I and Type II photooxidation mechanisms indicates potential phototoxic responses in cells. Biological results showed that derivatives I–V initiated different cytotoxic/phototoxic effects dependent on their concentration, time of treatment and the character of the cell line. UVA irradiation increased the cytotoxic activity of all tested 4-anilinoquinazoline derivatives. The highest cytotoxicity/phototoxicity on all tested cancer cells was induced by N,2-diphenyl-quinazolin-4-amine (derivative III). This most effective derivative emerged as the potent photosensitizer, which possesses a significant antiproliferative activity and DNA damage in L1210 cells increased by UVA irradiation. In addition derivative III induced programmed cell death in leukemia cells through mitochondrial/caspase 9/caspase 3-dependent pathway.

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Keywords
I, -(2-nitrophenyl)-6-bromo-2-morpholino-quinazolin-4-amine; II, N-(4-bromophenyl)-2-morpholino-quinazolin-4-amine; III, N,2-diphenyl-quinazolin-4-amine; IV, N-(4-chlorophenyl)-6-methyl-2-phenyl-quinazolin-4-amine; V, N-(4-methylphenyl)-6-chloro-2-phenyl-
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UVA-induced effects of 2,6-disubstituted 4-anilinoquinazolines on cancer cell lines
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 154, January 2016, Pages 77–88
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us