2. Academic Validation
  3. Cadmium induces apoptosis via generating reactive oxygen species to activate mitochondrial p53 pathway in primary rat osteoblasts

Cadmium induces apoptosis via generating reactive oxygen species to activate mitochondrial p53 pathway in primary rat osteoblasts

  • Toxicology. 2020 Dec 15;446:152611. doi: 10.1016/j.tox.2020.152611.
Jiaming Zheng 1,  Liling Zhuo 2,  Di Ran 1,  Yonggang Ma 1,  Tongwang Luo 1,  Hongyan Zhao 1,  Ruilong Song 1,  Hui Zou 1,  Jiaqiao Zhu 1,  Jianhong Gu 1,  Jianchun Bian 1,  Yan Yuan 3,  Zongping Liu 4
Affiliations

Affiliations

  • 1 College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China.
  • 2 Department of Life Science, Zaozhuang College, Zaozhuang 277160, PR China.
  • 3 College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China. Electronic address: [email protected].
  • 4 College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China. Electronic address: [email protected].
PMID: 33031904 DOI: 10.1016/j.tox.2020.152611
Abstract

Cadmium (Cd), a heavy metal produced by various industries, contaminates the environment and seriously damages the skeletal system of humans and Animals. Recent studies have reported that Cd can affect the viability of cells, including osteoblasts, both in vivo and in vitro. However, the mechanism of Cd-induced Apoptosis remains unclear. In the present study, primary rat osteoblasts were used to investigate the Cd-induced apoptotic mechanism. We found that treatment with 2 and 5 μM Cd for 12 h decreased osteoblast viability and increased Apoptosis. Furthermore, Cd increased the generation of Reactive Oxygen Species (ROS), and, thus, DNA damage measured via p-H2AX. The level of the nuclear transcription factor p53 was significantly increased, which upregulated the expression of PUMA, Noxa, Bax, and mitochondrial cytochrome c, downregulated the expression of Bcl-2, and increased the level of cleaved Caspase-3. However, pretreatment with the ROS scavenger N-acetyl-l-cysteine (NAC) or the p53 transcription specific inhibitor PFT-α suppressed Cd-induced Apoptosis. Our results indicate that Cd can induce Apoptosis in osteoblasts by increasing the generation of ROS and activating the mitochondrial p53 signaling pathway, and this mechanism requires the transcriptional activation of p53.

Keywords

Apoptosis; Cadmium; Osteoblast; Reactive oxygen species; p53.

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