- Macrophage colony-stimulating factor induces the growth and differentiation of normal pregnancy human cytotrophoblast cells and hydatidiform moles but does not induce the growth and differentiation of choriocarcinoma cells. Saito, S., Ibaraki, T., Enomoto, M., Ichijo, M., Motoyoshi, K. Jpn. J. Cancer Res. (1994)