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Transforming and carcinogenic potential of cadmium chloride in BALB/c-3T3 cells.

Authors
Keshava-N; Zhou-G; Hubbs-AF; Ensell-MX; Ong-T
Source
Mutat Res 2000 Mar; 448(1):23-28
NIOSHTIC No.
20020721
Abstract
A large number of workers are potentially exposed to cadmium during mining and processing. Therefore, there is a concern regarding the potential carcinogenic hazards of cadmium to exposed workers. Studies have been performed to determine if cadmium chloride (CdCl(2)) can induce morphological cell transformation, DNA from CdCl(2)-induced transformed cells can transform other mammalian cells, and the transformed cells induced by CdCl(2) can form tumors in nude mice. BALB/c-3T3 cells were treated with different concentrations of CdCl(2) for 72 h. The frequency of transformed foci from each treatment was determined after cells were cultured for 4 to 5 weeks. DNAs from five CdCl(2)-induced transformed cell lines were isolated and gene transfection assay was performed using NIH-3T3 cells. Non-transformed BALB/c-3T3 cells and cells from 10 transformed cell lines induced by CdCl(2) were injected into both axillary regions of nude mice. Mice were screened once a week for the appearance and size of tumors. CdCl(2) caused a statistically significant, concentration-related increase in the transformation frequency. DNA from all five CdCl(2)-induced transformed cell lines tested was found to induce varying degrees of transfection-mediated transformation in NIH-3T3 cells. All 10 CdCl(2)-induced transformed cell lines formed fibrosarcomas in nude mice within 39 days of inoculation. Within this time period, no tumors were found in nude mice injected with non-transformed BALB/c-3T3 cells. These results indicate that CdCl(2) is capable of inducing morphological cell transformation and that the transformed cells induced by CdCl(2) are potentially tumorigenic.
Keywords
Carcinogens; Carcinogenicity; Carcinogenesis; Cadmium-compounds; Occupational-exposure; Worker-health; Work-environment; Mining-industry; Mine-workers; Cell-transformation; Morphology; Tumors; Laboratory-animals; Animals; Animal-studies
Contact
Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, m/s 3014, 1095 Willowdale Road, Morgantown, WV 26505-2845, USA
CODEN
MUREAV
CAS No.
7440-43-9; 10108-64-2
Publication Date
20000314
Document Type
Journal Article
Email Address
too2@cdc.gov
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Issue of Publication
1
ISSN
0027-5107
NIOSH Division
HELD
Source Name
Mutation Research
State
WV
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