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Ohigashi, T. et al.

Ohigashi, Ueno, Nonaka, Deguchi, Murai,

Bcl-2 and androgen receptor gene expression in androgen-independent subclone derived from mouse androgen-dependent cells.

We investigated bcl-2 and androgen receptor ( AR) expression in an androgen-independent subline derived from mouse androgen-dependent mammary carcinoma cells. The androgen-independent SCAI cells were subcloned by cultivating androgen-dependent SC2G cells in serum-free, androgen-free conditions. The growth of the SCAI cells was not affected by testosterone. Western blot analysis showed greater expression of Bcl-2 protein in SCAI cells than in SC2G cells. A four-day culture with 4 microM antisense oligonucleotide complementary to mouse bcl-2 significantly decreased the viability of SCAI cells, when compared with sense control. The amount of the AR-mRNA expression in SCAI cells was slightly weaker. Direct sequence analysis showed no mutations in the AR of either androgen-dependent or -independent cells. These data indicate that the increased expression of Bcl-2 protein plays an important role in acquiring tolerance for the testosterone ablation, although it is not related to AR gene alteration.[1]

References

Bcl-2 and androgen receptor gene expression in androgen-independent subclone derived from mouse androgen-dependent cells. Ohigashi, T., Ueno, M., Nonaka, S., Deguchi, N., Murai, M. Cancer Invest. (2002) [Pubmed]

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