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Hogarty, M.D. et al.

Hogarty, Liu, Thompson, White, Sulman, Maris, Brodeur,

BIN1 inhibits colony formation and induces apoptosis in neuroblastoma cell lines with MYCN amplification.

BACKGROUND: MYCN amplification and overexpression occurs in 25% of neuroblastomas and independently predicts for poor prognosis disease, an effect thought to be mediated by its role as a transcriptional activator of growth promoting genes. However, in many mammalian cells, deregulated expression of MYC family genes (including MYCN) induces apoptosis. We hypothesized that BIN1, a MYC interacting protein capable of inducing apoptosis, may be an important regulator of MYCN in neuroblastoma. RESULTS: BIN1 expression was found to be reduced in MYCN-amplified cell lines. Further, forced expression of BIN1 markedly reduced colony formation in MYCN-amplified, but not single-copy, cell lines. This effect appeared to be caused by an increase in apoptosis, and was augmented by serum deprivation and concurrent cytotoxic drug therapy in cell culture CONCLUSION: BIN1 inactivation may be necessary for MYCN overexpression to lead to cellular proliferation rather than programmed cell death in neuroblastomas with MYCN amplification.[1]

References

BIN1 inhibits colony formation and induces apoptosis in neuroblastoma cell lines with MYCN amplification. Hogarty, M.D., Liu, X., Thompson, P.M., White, P.S., Sulman, E.P., Maris, J.M., Brodeur, G.M. Med. Pediatr. Oncol. (2000) [Pubmed]

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