The present invention relates to an in vitro method for identifying and evaluating compounds useful in the treatment of different types of cancer, especially lung, breast, colorectal and bladder cancer in an individual, for determining the stage or severity of said cancer in the individual, or for monitoring the effect of the therapy administered to an individual having said cancer; to finding, identifying, developing and evaluating the efficacy of compounds for the therapy of said cancer, for the purpose of developing new medicinal products; as well as to agents inhibiting the expression and/or activity of the choline kinase alpha protein and/or the effects of this expression.