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2014 ; 111
(6
): 1168-79
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Inhibition of Hedgehog signalling by NVP-LDE225 (Erismodegib) interferes with
growth and invasion of human renal cell carcinoma cells
#MMPMID25093491
D'Amato C
; Rosa R
; Marciano R
; D'Amato V
; Formisano L
; Nappi L
; Raimondo L
; Di Mauro C
; Servetto A
; Fulciniti F
; Cipolletta A
; Bianco C
; Ciardiello F
; Veneziani BM
; De Placido S
; Bianco R
Br J Cancer
2014[Sep]; 111
(6
): 1168-79
PMID25093491
show ga
BACKGROUND: Multiple lines of evidence support that the Hedgehog (Hh) signalling
has a role in the maintenance and progression of different human cancers.
Therefore, inhibition of the Hh pathway represents a valid anticancer therapeutic
approach for renal cell carcinoma (RCC) patients. NVP-LDE225 is a Smoothened
(Smo) antagonist that induces dose-related inhibition of Hh and Smo-dependent
tumour growth. METHODS: We assayed the effects of NVP-LDE225 alone or in
combination with everolimus or sunitinib on the growth and invasion of human RCC
models both in vitro and in vivo. To this aim, we used a panel of human RCC
models, comprising cells with acquired resistance to sunitinib - a multiple
tyrosine kinase inhibitor approved as a first-line treatment for RCC. RESULTS:
NVP-LDE225 cooperated with either everolimus or sunitinib to inhibit
proliferation, migration, and invasion of RCC cells even in sunitinib-resistant
(SuR) cells. Some major transducers involved in tumour cell motility, including
paxillin, were also efficiently inhibited by the combination therapy, as
demonstrated by western blot and confocal microscopy assays. Moreover, these
combined treatments inhibited tumour growth and increased animal survival in nude
mice xenografted with SuR RCC cells. Finally, lung micrometastasis formation was
reduced when mice were treated with NVP-LDE225 plus everolimus or sunitinib, as
evidenced by artificial metastatic assays. CONCLUSIONS: Hedgehog inhibition by
NVP-LDE225 plus sunitinib or everolimus bolsters antitumour activity by
interfering with tumour growth and metastatic spread, even in SuR cells. Thus,
this new evidence puts forward a new promising therapeutic approach for RCC
patients.