Evaluation of Arsenic Trioxide Potential for Lung Cancer Treatment: ASSessment of Apoptotic Mechanisms and Oxidative Damage

Collection:
Clark Atlanta University Faculty Publications
Title:
Evaluation of Arsenic Trioxide Potential for Lung Cancer Treatment: ASSessment of Apoptotic Mechanisms and Oxidative Damage
Creator:
Walker, Alice M.
Stevens, Jacqueline J.
Ndebele, Kenneth
Tchounwou, Paul B.
Date of Original:
2016-08-01
Subject:
African Americans--Education (Higher)--Georgia
Clark Atlanta University
Location:
United States, Georgia, Fulton County, Atlanta, 33.749, -84.38798
Medium:
articles
Type:
Text
Format:
application/pdf
Description:
Abstract: Background: Lung cancer is one of the most lethal and common cancers in the world, causing up to 3 million deaths annually. The chemotherapeutic drugs that have been used in treating lung cancer include cisplatinpemetrexed, cisplastin-gencitabinoe, carboplatin-pacitaxel and crizotinib. Arsenic trioxide (ATO) has been used in the treatment of acute promyelocytic leukemia. However, its effects on lung cancer are not known. We hypothesize that ATO may also have a bioactivity against lung cancer, and its mechanisms of action may involve apoptosis, DNA damage and changes in stress-related proteins in lung cancer cells. Methods: To test the above stated hypothesis, lung carcinoma (A549) cells were used as the test model. The effects of ATO were examined by performing 6-diamidine-2 phenylindole (DAPI) nuclear staining for morphological characterization of apoptosis, flow cytometry analysis for early apoptosis, and western blot analysis for stressrelated proteins (Hsp70 and cfos) and apoptotic protein expressions. Also, the single cell gel electrophoresis (Comet) assay was used to evaluate the genotoxic effect. Results: ATO-induced apoptosis was evidenced by chromatin condensation and formation of apoptotic bodies as revealed by DAPI nuclear staining. Cell shrinkage and membrane blebbing were observed at 4 and 6 ug/ml of ATO. Data from the western blot analysis revealed a significant dose-dependent increase (p less than 0.05) in the Hisp 70, caspase 3 and p53 protein expression, and a significant (p less than 0.05) decrease in the cfos, and bol-2 protein expression at 4 and 6 g/ml of ATO. There was a slight decrease in cytochrome c protein expression at 4 and 6 g/ ml of ATO. Comet assay data revealed significant dose-dependent increases in the percentages of DNA damage. Comet tail lengths, and Comet tail moment. Conclusion: Taken together our results indicate that ATO is cytotoxic to lung cancer cells and its bioactivity is associated with Oxidative damage, changes in cellular morphology, and apoptosis.
Source: Cancer Science and Therapy 2016,8,1
DOI: 10.472/1948-5956.1000379
Metadata URL:
http://hdl.handle.net/20.500.12322/cau.ir:2016_walker_alice_m
Language:
eng
Original Collection:
Clark Atlanta University Faculty Publications
Holding Institution:
Clark Atlanta University
Rights:

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