Journal: International Journal of Molecular Sciences
Article Title: VEGFB Promotes Myoblasts Proliferation and Differentiation through VEGFR1-PI3K/Akt Signaling Pathway
doi: 10.3390/ijms222413352
Figure Lengend Snippet: VEGFB activated the PI3K/Akt/mTOR signaling pathway in a VEGFR1-dependent manner and the inhibition of PI3K/Akt blocked the promotion of C2C12 differentiation induced by VEGFB. ( A ) Western blot analysis of p-PI3K, PI3K, p-Akt, Akt p-mTOR, mTOR, p-S6, and S6 in C2C12 treated with or without VEGFB and/or axitinib after 5 days of differentiation. ( B ) Mean ± SEM of immunoblotting bands of p-PI3K/PI3K, p-Akt/Akt p-mTOR/mTOR, and p-S6/S6 in panel A. ( C ) Western blot analysis of p-PI3K, PI3K, p-Akt, Akt p-mTOR, mTOR, p-S6, and S6 in C2C12 treated with or without VEGFB and/or siVEGFR1 after 5 days of differentiation. ( D ) Mean ± SEM of immunoblotting bands of p-PI3K/PI3K, p-Akt/Akt, p-mTOR/mTOR, and p-S6/S6 in panel C; the results are expressed as arbitrary units ( n = 3). ( E ) Effect of 100 ng/mL of VEGFB and/or 2 µM of Wortmannin on the differentiation of C2C12 after 5 days of differentiation was determined by immunofluorescence of MyHC ( n = 3). The nuclei were stained with Hoechst and the scale bar = 200 µm. ( F ) The differentiation index was counted by comparing the MyHC-positive cells to total nuclei in panel E. ( G ) Western blot analysis of MyHC, MyoD, MyoG, p-PI3K/PI3K, p-Akt/Akt, p-mTOR/mTOR, and p-S6/S6 in C2C12 after 5 days of differentiation. GAPDH was used as loading control. ( H ) Mean ± SEM of immunoblotting bands of MyHC, MyoD, MyoG, p-PI3K/PI3K, p-Akt/Akt, p-mTOR/mTOR, and p-S6/S6; the results are expressed as arbitrary units ( n = 3). * p < 0.05 versus control group. n.s = not significant. siVEGFR1, small interfering RNA for VEGFR1.
Article Snippet: Recombinant mouse VEGFB protein (#293-VE-010) was purchased from R&D systems (Minneapolis, MN, USA).
Techniques: Inhibition, Western Blot, Immunofluorescence, Staining, Control, Small Interfering RNA