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Curcumin inhibits B [a] PDE ‐induced procarcinogenic signals in lung cancer cells, and curbs B [a] P ‐induced mutagenesis and lung carcinogenesis
Author(s) -
Puliyappadamba Vineshkumar T.,
Thulasidasan Arun Kumar T,
Vijayakurup Vinod,
Antony Jayesh,
Bava Smitha V.,
Anwar Shabna,
Sundaram Sankar,
Anto Ruby John
Publication year - 2015
Publication title -
biofactors
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 94
eISSN - 1872-8081
pISSN - 0951-6433
DOI - 10.1002/biof.1244
Subject(s) - curcumin , benzo(a)pyrene , chemistry , in vivo , carcinogenesis , lung cancer , pharmacology , microbiology and biotechnology , carcinogen , cancer research , pyrene , biochemistry , biology , medicine , pathology , gene , organic chemistry
Benzo[a]pyrene is a procarcinogen present in environment and cigarette smoke, which could be bio‐transformed in vivo to B[a]PDE, a potent carcinogen known to form DNA adducts and induce mutations. We observed that curcumin, a known chemopreventive, could significantly inhibit the survival of lung cancer cells exposed to B[a]PDE. It also downregulates B[a]PDE‐induced nuclear translocation of NF‐κB as assessed by Electrophoretic Mobility Shift Assay (EMSA) and NF‐κB‐dependent reporter gene assay. Ames assay demonstrated its ability to revert the mutagenic property of benzo[a]pyrene. These observations prompted us to evaluate the efficacy of curcumin in preventing B[a]P‐induced lung carcinogenesis in vivo and to explore the molecular mechanism associated with it. The average number of tumor nodules present in the lungs of the Swiss albino mice, which received benzo[a]pyrene, was significantly high compared to that received curcumin as 2% diet along with B[a]P. Curcumin treatment significantly reverted histopathological deviations in the lung tissues due to benzo[a]pyrene ingestion. Moreover, curcumin diet reduced benzo[a]pyrene‐induced activation of NF‐κB and MAPK signaling and Cox‐2 transcription in lung tissues of mice. Taken together, this study illustrates multifaceted efficacy of curcumin in preventing lung cancer. © 2015 BioFactors, 41(6):431–442, 2015