Perifosine synergizes with vincristine in a MYCN-amplified xenografted neuroblastoma model. (A, B) Perifosine
was
administered by oral gavage 5 days/week throughout the study, and
vincristine was administered by i.v. once daily for the first 5 days.
Kaplan–Meier survival curves (n = 8/group)
of BE(2)-C (A) or SK-N-AS (B) tumor-grafted mice treated by vehicle
(black), perifosine alone (blue), vincristine alone (red), or their
combination (orange). (C) Tumors were collected after 1 week of treatment,
and tumor size was determined in the different groups in nude mice
harboring MYCN-amplified BE(2)-C xenograft tumors
(n = 4/group; Student’s t-test; *, p < 0.05). (D) Western blot analysis
in protein extracts from BE(2)-C xenografted cells after 1 week of
treatment of vehicle (black), perifosine 20 mg/kg (oral gavage, daily,
blue), vincristine 0.2 mg/kg (i.v. 5 days, red), and the combination
vincristine with perifosine (orange). n = 3 different
mice/group. Blots were probed with the indicated antibodies. GAPDH
was used as a loading control.