Figure 6. Effect of Gata1, SP1, SMAD3 and E2F4 on transcriptional activity of LTBP4L and LTBP4S promoter.

HEK293 cells were transiently transfected with pGL4.10-LTBP4L or pGL4.10-LTBP4S and a Renilla luciferase expression vector for normalization. Cells were also co-transfected with different concentrations of A) a Gata1 expression vector, B) a SP1 expression vector, C) a SMAD3 expression vector or D) an E2F4 expression vector. After 24 h cells were lysed and luciferase activities were determined. Experiments were repeated at least 3 times and the mean value was calculated. Data are presented ± standard deviation.