Выходит 4 номеров в год
ISSN Печать: 0731-8898
ISSN Онлайн: 2162-6537
IF:
2.4
5-Year IF:
2.8
Immediacy Index:
0.5
Eigenfactor:
0.00049
JCI:
0.59
SJR:
0.429
SNIP:
0.507
CiteScore™::
3.9
H-Index:
49
Indexed in
Tungsten Carbide-Cobalt Particles Activate Nrf2 and Its Downstream Target Genes in JB6 Cells Possibly by ROS Generation
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Краткое описание
Hard metal consisting of a mixture of tungsten carbide (WC) and metallic cobalt (Co) was evaluated as a possible carcinogen in humans by IARC in 2003. Studies have suggested that nuclear factor erythroid 2-related factor 2 (Nrf2) constitutes one of the chemical-sensing and transcription systems that play an essential role(s) in chemical toxicity, carcinogenesis, and pathological processes. To elucidate the mechanisms of health hazards of WC-Co, effects of nano-WC-Co particles on Nrf2 signaling pathway were investigated in the present study in a JB6 cell line. After a 5 h treatment with nano-WC-Co particles, Nrf2 was released from Keap1 in the cytoplasm and translocated into the nucleus. Enzymatic activities of Nrf2 target genes, including glutathione S-transferase (GST) and NAD(P)H:quinone oxidoreductase 1 (NQO1), increased at 24 and 48 h after the treatment. Studies using reactive oxygen species (ROS) sensitive dyes indicated that ROS were produced in nano-WC-Co particle-treated cells. Pretreatment of the cells with catalase, but not sodium formate, resulted in a significant inhibitory effect on nano-WC-Co particle-induced Nrf2 target gene activation. These findings suggest that activation of Nrf2 and its downstream genes may be initiated by ROS generation, and ROS may act as a major contributor in nano-WC-Co particle-induced adverse health effects.
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