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Genomic instability is generally considered as a hallmark of tumorigenesis and a prerequisite condition for malignant transformation. Aluminium salts are suspected environmental carcinogens that transform mammary epithelial cells in vitro through unknown mechanisms. We report here that long-term culture in the presence of aluminium chloride (AlCl3) enables HC11 normal mouse mammary epithelial cells to form tumours and metastases when injected into the syngeneic and immunocompetent BALB/cByJ strain. We demonstrate that AlCl3 rapidly increases chromosomal structural abnormalities in mammary epithelial cells, while we failed to detect direct modulation of specific mRNA pathways. Our observations provide evidence that clastogenic activity-a well-recognized inducer of genomic instability-might account in part for the transforming abilities of aluminium in mammary epithelial cells.

Original publication

DOI

10.3390/ijms21239332

Type

Journal article

Journal

Int J Mol Sci

Publication Date

07/12/2020

Volume

21

Keywords

aluminium, breast cancer, carcinogenesis, clastogens, genomic instability, Aluminum, Animals, Carcinogenesis, Carcinogens, Environmental, Cell Line, Tumor, Female, Genomic Instability, Mice, Mice, Inbred BALB C