Figure 6.

VT and Ang1 increase survival and function of irradiated immortalized human microvascular endothelial cells. (A) In vitro HMVEC^hTERT clonogenic survival with 28 ng ml⁻¹ VT (left) or 200 ng ml⁻¹ Ang1 (right). Expressed as mean ± SD and SERs are indicated. (B) Micrographs of HMVEC^hTERT tubule formation on Matrigel 6 h after plating (left, scale bars = 500 μm). Cells were pre-treated with PBS, 28 ng ml⁻¹ VT or 200 ng ml⁻¹ Ang1, and 0 or 4 Gy, and results are graphed (right). Expressed as mean ± SD. * represents P < 0.05, ** represents P < 0.01, “ns” represents ‘not significant’.