- Transcriptional regulation of serum amyloid A1 gene expression in human aortic smooth muscle cells involves CCAAT/enhancer binding proteins (C/EBP) and is distinct from HepG2 cells. Kumon, Y., Suehiro, T., Faulkes, D.J., Hosakawa, T., Ikeda, Y., Woo, P., Sipe, J.D., Hashimoto, K. Scand. J. Immunol. (2002)