- Farnesyltransferase inhibitor tipifarnib (R115777) preferentially inhibits in vitro autonomous erythropoiesis of polycythemia vera patient cells. Larghero, J., Gervais, N., Cassinat, B., Rain, J.D., Schlageter, M.H., Padua, R.A., Chomienne, C., Rousselot, P. Blood (2005)