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2016 ; 12
(3
): 2222-2226
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Farnesyl transferase inhibitor FTI-277 inhibits breast cell invasion and
migration by blocking H-Ras activation
#MMPMID27602167
Lee KH
; Koh M
; Moon A
Oncol Lett
2016[Sep]; 12
(3
): 2222-2226
PMID27602167
show ga
Hyperactive Ras promotes proliferation and malignant phenotypic conversion of
cells in cancer. Ras protein must be associated with cellular membranes for its
oncogenic activities through post-translational modifications, including
farnesylation. Farnesyltransferase (FTase) is essential for H-Ras membrane
targeting, and H-Ras, but not N-Ras, has been demonstrated to cause an invasive
phenotype in MCF10A breast epithelial cells. In the present study, it was
observed that an FTase inhibitor (FTI), FTI-277, blocked epidermal growth factor
(EGF)-induced H-Ras activation, but not N-Ras activation in MDA-MB-231 cells,
which express wild-type H-Ras and N-Ras. FTI-277 exerted a more potent inhibitory
effect on the proliferation of H-Ras-MCF10A cells and Hs578T breast cancer cells
expressing an active mutant of H-Ras than that of MDA-MB-231 cells. The
invasive/migratory phenotypes of the H-Ras-MCF10A and Hs578T cells were
effectively inhibited by FTI-277 treatment. By contrast, FTI-277 did not affect
the invasive/migratory phenotypes of MDA-MB-231 cells. However, the EGF-induced
invasion of MDA-MB-231 cells was decreased by FTI-277, implicating that FTI-277
inhibits breast cell invasion and migration by blocking H-Ras activation. Taken
together, the results of the present study suggest that FTase inhibition by
FTI-277 may be an effective strategy for targeting H-Ras-mediated proliferation,
migration and invasion of breast cells.