Apoptosis induction by an analog of curcumin (BDMC-A) in human laryngeal carcinoma cells through intrinsic and extrinsic pathways
IR @ National Institute of Immunology
Title
Apoptosis induction by an analog of curcumin (BDMC-A) in human laryngeal carcinoma cells through intrinsic and extrinsic pathways
Creator
Mohankumar, K. Pajaniradje, S. Sridharan, S.
Description
Head and neck cancer is the sixth most frequently occurring cancer worldwide and accounts for about 2 % of all cancer-related deaths annually. Curcumin is a well-known chemopreventive agent, and apoptosis induction by curcumin has been reported in many cancer cell types. We synthesized an ortho-hydroxy substituted analog of curcumin, bisdemethoxycurcumin analog (BDMC-A), and aimed to demarcate the apoptotic effects induced by BDMC-A on human laryngeal cancer Hep-2 cells and to compare these effects with those induced by curcumin. We evaluated the apoptotic effects of BDMC-A in comparison to those of curcumin on Hep-2 cells by performing Western blotting, RT-PCR, fluorescent staining and DNA fragmentation assays. In addition, we carried out an in silico molecular docking study on the EGFR kinase domain. We found that BDMC-A can induce apoptosis in Hep-2 cells by regulating the expression of both intrinsic and extrinsic apoptotic proteins, i.e., Bcl-2, Bax, apoptososme complex and death receptors, more efficiently than curcumin. We also observed increased nuclear fragmentation and chromatin condensation after BDMC-A treatment compared to curcumin treatment. Depolarized mitochondria and ROS generation was well pronounced in both BDMC-A and curcumin treated Hep-2 cells. Our in silico molecular docking study on the EGFR kinase domain revealed that BDMC-A may dock more efficiently than curcumin. From our results we conclude that BDMC-A can induce apoptosis in Hep-2 laryngeal carcinoma cells more effectively than curcumin, and that this activity can be attributed to the presence of a hydroxyl group at the ortho position within this compound.
Type
Article PeerReviewed
Identifier
Mohankumar, K. and Pajaniradje, S. and Sridharan, S. (2014) Apoptosis induction by an analog of curcumin (BDMC-A) in human laryngeal carcinoma cells through intrinsic and extrinsic pathways. Cellualr Oncology, 37 (6). pp. 439-454.