1.14.14.29 down expression of CYP7B1 by estrogen receptor can be mediated via the PI3K/Akt signal pathway. Treatment with LY294002, a specific inhibitor of phosphatidylinositol 3-kinase PI3K, abolishes estrogen-receptor-mediated up-regulation of a CYP7B1 promoter-luciferase reporter 705397 1.14.14.29 additional information lipopolysaccharide treatment does not increase the expression 699414 1.14.14.29 up expression of CYP7B1 by estrogen receptor can be mediated via the PI3K/Akt signal pathway. Overexpression of PI3K or Akt significantly increases estrogenic up-regulation of CYP7B1 705397