Ultraviolet-A radiation induces changes in cyclin G gene expression in mouse melanoma B16-F1 cells.

Abstract:

BACKGROUND:We have previously shown that ultraviolet-A (UVA) radiation enhances metastatic lung colonization capacity of B16-F1 melanoma cells. The aim of this study was to examine changes in expression profile of genes in mouse melanoma B16-F1 cells exposed to UVA radiation. RESULTS:B16-F1 melanoma cells were exposed to a single UVA radiation dose of 8 J/cm2 and mRNA was isolated 4 h after the end of UVA exposure. Atlas Mouse Cancer 1.2 cDNA expression arrays were used for the large-scale screening to identify the genes involved in the regulation of carcinogenesis, tumor progression and metastasis. Physiologically relevant UVA dose induced differential expression in 9 genes in the UVA exposed melanoma cells as compared to the unexposed control cells. The expression of seven genes out of nine was upregulated (HSC70, HSP86, alpha-B-crystallin, GST mu2, Oxidative stress induced protein OSI, VEGF, cyclin G), whereas the expression of two genes was down-regulated (G-actin, non-muscle cofilin). The gene expression of cyclin G was mostly affected by UVA radiation, increasing by 4.85-folds 4 hour after exposure. The analysis of cyclin G protein expression revealed 1.36-fold increase at the 6 hour time point after UVA exposure. Cell cycle arrest in G2/M phase, which is known to be regulated by cyclin G, occurred at 4-h hour time-point, peaking 8 hours after the end of UVA irradiation, suggesting that cyclin G might play a role in the cell cycle arrest. CONCLUSION:Our results suggest that UVA radiation-induces changes in the expression of several genes. Some of these changes, e.g. in expression of cyclin G, possibly might affect cell physiology (cell cycle arrest).

journal_name

Cancer Cell Int

authors

Pastila R,Leszczynski D

doi

10.1186/1475-2867-7-7

subject

Has Abstract

pub_date

2007-05-02 00:00:00

pages

7

issn

1475-2867

pii

1475-2867-7-7

journal_volume

7

pub_type

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