The considerable progress of molecular biology within the past twenty years has permitted a more and more detailed characterization of the molecular mechanisms regulating cell proliferation. The corollary to these discoveries has been the identification of different deregulations yielding to cell transformation and cancer. The goal of this review is to present new therapeutic tools that stemmed from the now well understood logic underlying cell transformation. These tools, based on the intimate understanding of signalization pathways, aim at restoring the molecular controls which had been abrogated during the process of cell transformation. We present a survey of these new proposed therapeutic strategies. These new approaches will probably allow the clinician, in the near future, to combine traditional therapies with more targeted ones, and thus to limit side effects often associated with classical cancer therapies, while improving the overall effect of the treatment.