期刊
BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY
卷 17, 期 1, 页码 28-33出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1990747823100021
关键词
human carcinoma cells; TRAIL-induced apoptosis; confluent culture; TRAIL resistance; TRAIL receptors
类别
In this study, we found that the increased resistance of A-431 cells to TRAIL-induced apoptosis in confluent cultures is associated with reduced expression of pro-apoptotic receptors DR4 and DR5, as well as the absence of anti-apoptotic receptors DcR1 and DcR2 on the cell surface. The decreased representation of DR4 and DR5 receptors is accompanied by a lack of activation of the pro-apoptotic protein Bid and effector caspase 3 under the action of recombinant protein izTRAIL, leading to an increase in TRAIL resistance. These results suggest that the reversible increase in TRAIL resistance in A-431 cells is caused by a decrease in the expression of DR4 and DR5 receptors on the cell surface.
-TRAIL (TNF alpha Related Apoptosis Inducing Ligand) cytokine is of great interest for the development of targeted antitumor drugs. We have previously found a reversible increase in tumour cell resistance to TRAIL-induced apoptosis in confluent cultures. In this work we show that increase in resistance of A-431 cells to TRAIL-induced death in confluent culture is associated with reduced expression of pro-apoptotic receptors DR4 and DR5 with absence of anti-apoptotic receptors DcR1 and DcR2 on cell surface. Decreased representation of DR4 and DR5 receptors on the cell surface is accompanied by a lack of activation of the pro-apoptotic protein Bid, effector caspase 3 under the action of recombinant protein izTRAIL, which leads to an increase in TRAIL resistance. Our results indicate that reversible increase in resistance of human carcinoma A-431 cells to TRAIL-induced apoptosis in confluent cultures is caused by decrease in expression of DR4 and DR5 receptors on cell surface.
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