Benzo(a)pyrene induces p73 mRNA expression and necrosis in human lung adenocarcinoma H1299 cells. 2012

Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
Department of Occupational and Environmental Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.

p53 can mediate DNA damage-induced apoptosis in various cell lines treated with Benzo(a)pyrene (BaP). However, the potential role of p73, one of the p53 family members, in BaP-induced apoptotic cell death remains to be determined. In this study, normal fetal lung fibroblasts (MRC-5) and human lung adenocarcinoma cells (H1299, p53-null) were treated with BaP at concentrations of 8, 16, 32, 64, and 128 μM for 4 and 12 h. The oxidative stress status, extent of DNA damage, expression of p53, p73, mdm2, bcl-2, and bax at the mRNA and protein levels, and the percentages of apoptosis and/or necrosis were assessed. In the two BaP-treated cell lines, we observed increased malondialdehyde (MDA) formation and decreased superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activity at 4 h after the treatment; furthermore, at the time points of 4 and 12 h, we observed extremely high levels of DNA damage. In addition, at 4 h after the treatment, BaP had induced necrosis in MRC-5 and H1299 cells, but it had inhibited apoptosis in MRC-5 cells (P < 0.01 for all). Furthermore, in BaP-treated H1299 cells, only the p73 mRNA level was up-regulated. The results suggested that BaP-induced DNA damage could trigger a shift from apoptotic cell death toward necrotic cell death and that necrotic cell death is independent of p53 and p73 in these cell lines. Future studies are needed to investigate the time course of changes in the type of BaP-induced cell death in more cell lines.

UI MeSH Term Description Entries
D009336 Necrosis The death of cells in an organ or tissue due to disease, injury or failure of the blood supply.
D009687 Nuclear Proteins Proteins found in the nucleus of a cell. Do not confuse with NUCLEOPROTEINS which are proteins conjugated with nucleic acids, that are not necessarily present in the nucleus. Nucleolar Protein,Nucleolar Proteins,Nuclear Protein,Protein, Nuclear,Protein, Nucleolar,Proteins, Nuclear,Proteins, Nucleolar
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D004249 DNA Damage Injuries to DNA that introduce deviations from its normal, intact structure and which may, if left unrepaired, result in a MUTATION or a block of DNA REPLICATION. These deviations may be caused by physical or chemical agents and occur by natural or unnatural, introduced circumstances. They include the introduction of illegitimate bases during replication or by deamination or other modification of bases; the loss of a base from the DNA backbone leaving an abasic site; single-strand breaks; double strand breaks; and intrastrand (PYRIMIDINE DIMERS) or interstrand crosslinking. Damage can often be repaired (DNA REPAIR). If the damage is extensive, it can induce APOPTOSIS. DNA Injury,DNA Lesion,DNA Lesions,Genotoxic Stress,Stress, Genotoxic,Injury, DNA,DNA Injuries
D004268 DNA-Binding Proteins Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases. DNA Helix Destabilizing Proteins,DNA-Binding Protein,Single-Stranded DNA Binding Proteins,DNA Binding Protein,DNA Single-Stranded Binding Protein,SS DNA BP,Single-Stranded DNA-Binding Protein,Binding Protein, DNA,DNA Binding Proteins,DNA Single Stranded Binding Protein,DNA-Binding Protein, Single-Stranded,Protein, DNA-Binding,Single Stranded DNA Binding Protein,Single Stranded DNA Binding Proteins
D005347 Fibroblasts Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules. Fibroblast
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000072160 Tumor Protein p73 A homolog of p53 TUMOR SUPPRESSOR PROTEIN that encodes full-length trans-activating and N-terminally-truncated (DeltaN) isoforms. Detection of splice variants and isoforms in the nervous system (human TELENCEPHALON, CHOROID PLEXUS; CEREBROSPINAL FLUID), embryonic tissue, human BREAST CANCER; OVARIAN CANCER, suggest roles in cellular differentiation. Protein p73,TP73 Protein,Tap73 Protein, Human,Tumor Suppressor Protein p73,p73 Protein,p73-alpha,p73-beta,Human Tap73 Protein,Protein p73, Tumor,Protein, Human Tap73,Protein, TP73,Protein, p73,p73 alpha,p73 beta,p73, Protein,p73, Tumor Protein
D001564 Benzo(a)pyrene A potent mutagen and carcinogen. It is a public health concern because of its possible effects on industrial workers, as an environmental pollutant, an as a component of tobacco smoke. 3,4-Benzopyrene,3,4-Benzpyrene,3,4 Benzopyrene,3,4 Benzpyrene
D014158 Transcription, Genetic The biosynthesis of RNA carried out on a template of DNA. The biosynthesis of DNA from an RNA template is called REVERSE TRANSCRIPTION. Genetic Transcription

Related Publications

Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
June 2004, Ai zheng = Aizheng = Chinese journal of cancer,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
May 2002, The Journal of steroid biochemistry and molecular biology,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
July 2012, Toxicology mechanisms and methods,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
March 2021, Ecotoxicology and environmental safety,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
January 2014, PloS one,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
September 2019, Medical oncology (Northwood, London, England),
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
September 2007, Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine],
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
October 2004, Zhongguo fei ai za zhi = Chinese journal of lung cancer,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
February 2003, Journal of pharmacological sciences,
Ying Jiang, and Kaimin Rao, and Guangtao Yang, and Xi Chen, and Qian Wang, and Ailin Liu, and Hongyan Zheng, and Jing Yuan
January 2016, Journal of toxicology and environmental health. Part A,
Copied contents to your clipboard!