Replicate cultures of HepG2 cells were transfected with negative control siRNA (grey bars) or ATF4 siRNA #1 (white bars), then cultured in media with 25 mM, 5 mM, or 0 mM glucose for 24 hr. RNA was analyzed by qRT-PCR for expression of amplicons as shown. For each amplicon, average expression at 25 mM glucose with the negative control siRNA was considered 100% and other values are shown as % expression +/− SD relative to that. N = 3 per group. Panel A, coagulation factor genes; panels B and C, stress responsive genes. At 0 mM glucose, expression was significantly increased for F7, ATF4, ATF6, XBP1(S), GADD34, GRP-78, ASNS, C/EBPβ, ATF3 and CHOP (all p<0.001). Please note difference in scale between panel A and panels B and C. ATF4 siRNA blocked all increases (all p<0.005) except for GRP-78, GADD34 and CHOP. Expression of FX, F2 and PROS1 were significantly decreased at 0 mM glucose (all p<0.001) and were not significantly affected by ATF4 siRNA.