Fig. 2. p75NTR stimulation activated SREBP1 and SREBP2 in Huh7 hepatocyte cells.

Human Huh7 cells were stimulated with 10 ng/ml pro-NGF or 50 ng/ml NGF for 16 h followed by immunoblotting using antibodies to detect the presence of cleaved/activated SREBP1 and SREBP2. a SREBP1, immunoblots and b quantification. Values are mean ± SD, n = 3. **P < 0.01 and *p < 0.05 for treated vs. control cells. c, d SREBP2. Cells were treated with 10 ng/ml pro-NGF in the absence or presence of 0.5 μM PF429242 (PF), which is a selective inhibitor of the Site 1 protease (S1P). c Immunoblots and d quantification. PF decreased the amount of processed SREBP2 in these cells; however, addition of pro-NGF increased the relative level of cleaved SREBP2. Values are mean ± SD, n = 3. *p < 0.05 for treated vs. the corresponding control