NDLI: 2-aryl benzimidazole conjugate induced apoptosis in human breast cancer MCF-7 cells through caspase independent pathway

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2-aryl benzimidazole conjugate induced apoptosis in human breast cancer MCF-7 cells through caspase independent pathway

Content Provider	Springer Nature Link
Author	Nayak, V. Lakshma Nagesh, Narayana Ravikumar, A. Bagul, Chandrakant Vishnuvardhan, M. V. P. S. Srinivasulu, Vunnam Kamal, Ahmed
Copyright Year	2016
Abstract	Apoptosis is a representative form of programmed cell death, which has been assumed to be critical for cancer prevention. Thus, any agent that can induce apoptosis may be useful for cancer treatment and apoptosis induction is arguably the most potent defense against cancer promotion. In our previous studies, 2-aryl benzimidazole conjugates were synthesized and evaluated for their antiproliferative activity and one of the new molecule (2f) was considered as a potential lead. This lead molecule showed significant antiproliferative activity against human breast cancer cell line, MCF-7. The results of the present study revealed that this compound arrested the cell cycle at G2/M phase. Topoisomerase II inhibition assay and Western blot analysis suggested that this compound effectively inhibits topoisomerase II activity which leads to apoptotic cell death. Apoptosis induction in MCF-7 cells was further confirmed by loss of mitochondrial membrane potential (∆Ψm), release of cytochrome c from mitochondria, an increase in the level of apoptosis inducing factor (AIF), generation of reactive oxygen species (ROS), up regulation of proapoptotic protein Bax and down regulation of anti apoptotic protein Bcl-2. Apoptosis assay using Annexin V-FITC assay also suggested that this compound induced cell death by apoptosis. However, compound 2f induced apoptosis could not be reversed by Z-VAD-FMK (a pan-caspase inhibitor) demonstrated that the 2f induced apoptosis was caspase independent. Further, 2f treatment did not activate caspase-7 and caspase-9 activity, suggesting that this compound induced apoptosis in breast cancer cells via a caspase independent pathway. Most importantly, this compound was less toxic towards non-tumorigenic breast epithelial cells, MCF-10A. Furthermore, docking studies also support the potentiality of this molecule to bind to the DNA topoisomerase II.
Starting Page	118
Ending Page	134
Page Count	17
File Format	PDF
ISSN	13608185
Journal	Apoptosis
Volume Number	22
Issue Number	1
e-ISSN	1573675X
Language	English
Publisher	Springer US
Publisher Date	2016-10-21
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anticancer activity Topoisomerase II Western blot analysis Annexin V-FITC and apoptosis Cancer Research Cell Biology Oncology Biochemistry Virology
Content Type	Text
Resource Type	Article
Subject	Pharmaceutical Science Biochemistry (medical) Cell Biology Clinical Biochemistry Cancer Research Pharmacology

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