The present disclosure includes methods and compositions for the treatment or prevention of diseases and disorders characterized by excessive or misregulated cellular proliferations, including methods for the treatment of tumors. The methods involve the use of pharmaceutical compositions comprising at least one agent selected from the group consisting of a LIF preparation, a BMP preparation, a BMPR signalling activator, and a LIFR signalling activator. The disclosure also includes LIF preparations, BMP preparations, BMPR signalling activator, and LIFR signalling activators, and methods for the identification of LIF preparations, BMP preparations, BMPR signalling activator, and LIFR signalling activators. The disclosure also includes pharmaceutical compositions comprising at least one agent selected from the group consisting of a LIF preparation, a BMP preparation, a BMPR signalling activator, and a LIFR signalling activator.
