Fig. 2: Antitumor activity of lenvatinib and modulation of NRP1 expression in the in vitro models of HCC.

Different concentrations of lenvatinib ranging from 0.5 to 30 µM were used for the treatment of HCC cells during 48 h to determine the effects on (a) cell viability by CellTiter-Glo® assay, (b) colony formation assay, and (c) nuclear translocation of Ki67 by ICC and confocal microscopy. NRP1 expression was analyzed at (d) mRNA levels by qRT-PCR, and at protein levels by (e) Western blot and (f) ICC after 48 h of 2.5 and 5 µM lenvatinib treatment. Data from (a) are represented as % of cell viability relative to non-treated cells ± SD (n = 7). Data from (b–f) are represented as mean values of arbitrary units (a.u.) ± SD (n = 3). Bar graphs from (c) and (f) represent the nuclear CTCF ratio of Ki67 and NRP1 CTCF ratio, respectively. Magnification 63×, scale bar 10 µm. e A representative immunoblot is shown. *P < 0.05, **P < 0.01, ***P < 0.001 and ns, not significant vs non-treated cells.