Expression of TRPC isoforms on HUVEC and effects of protein silencing on tube formation.
A, mRNA amplification of TRPC1, TRPC3, TRPC4, TRPC5, TRPC6, and TRPC7 isoforms by real-time PCR in HUVECs. B, mRNA levels assessed by quantitative RT-PCR 48 h after transfection (mean ± S.E. (error bars), 2–4 independent experiments). C, 48 h after transfection with siRNA (against TRPC1, TRPC4, STIM1, and Orai1), the HUVECs were seeded on growth factor-reduced Matrigel and visualized 10–14 h later. D, quantification of tube formation in control condition and upon siRNA treatment. Data are mean ± S.E. of three to five independent experiments. Scale bar, 200 μm. ns, not significant; ***, p < 0.001.