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2017 ; 56
(13
): 7558-7565
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Anticancer Activity of Polyoxometalate-Bisphosphonate Complexes: Synthesis,
Characterization, In Vitro and In Vivo Results
#MMPMID28631925
Boulmier A
; Feng X
; Oms O
; Mialane P
; Rivière E
; Shin CJ
; Yao J
; Kubo T
; Furuta T
; Oldfield E
; Dolbecq A
Inorg Chem
2017[Jul]; 56
(13
): 7558-7565
PMID28631925
show ga
We synthesized a series of polyoxometalate-bisphosphonate complexes containing
Mo(VI)O(6) octahedra, zoledronate, or an N-alkyl (n-C(6) or n-C(8)) zoledronate
analogue, and in two cases, Mn as a heterometal. Mo(6)L(2) (L = Zol, ZolC(6),
ZolC(8)) and Mo(4)L(2)Mn (L = Zol, ZolC(8)) were characterized by using
single-crystal X-ray crystallography and/or IR spectroscopy, elemental and energy
dispersive X-ray analysis and (31)P NMR. We found promising activity against
human nonsmall cell lung cancer (NCI-H460) cells with IC(50) values for growth
inhibition of ?5 ?M per bisphosphonate ligand. The effects of bisphosphonate
complexation on IC(50) decreased with increasing bisphosphonate chain length:
C(0) ? 6.1×, C(6) ? 3.4×, and C(8) ? 1.1×. We then determined the activity of one
of the most potent compounds in the series, Mo(4)Zol(2)Mn(III), against SK-ES-1
sarcoma cells in a mouse xenograft system finding a ?5× decrease in tumor volume
than found with the parent compound zoledronate at the same compound dosing (5
?g/mouse). Overall, the results are of interest since we show for the first time
that heteropolyoxomolybdate-bisphosphonate hybrids kill tumor cells in vitro and
significantly decrease tumor growth, in vivo, opening up new possibilities for
targeting both Ras as well as epidermal growth factor receptor driven cancers.