PMID- 19678801 OWN - NLM STAT- MEDLINE DCOM- 20100225 LR - 20211203 IS - 1744-7658 (Electronic) IS - 1354-3784 (Linking) VI - 18 IP - 9 DP - 2009 Sep TI - Targeting the PI3K/AKT/mTOR signaling network in acute myelogenous leukemia. PG - 1333-49 LID - 10.1517/14728220903136775 [doi] AB - BACKGROUND: The PI3K/Akt/mammalian target of rapamycin (mTOR) signaling pathway plays a central role in cell growth, proliferation and survival not only under physiological conditions but also in a variety of tumor cells. Therefore, the PI3K/Akt/mTOR axis may be a critical target for cancer therapy. OBJECTIVE: This review discusses how PI3K/Akt/mTOR signaling network is constitutively active in acute myelogenous leukemia (AML), where it strongly influences proliferation, survival and drug-resistance of leukemic cells, and how effective targeting of this pathway with pharmacological inhibitors, used alone or in combination with existing drugs, may result in suppression of leukemic cell growth, including leukemic stem cells. METHODS: We searched the literature for articles dealing with activation of this pathway in AML and highlighting the efficacy of small molecules directed against the PI3K/Akt/mTOR signaling cascade. CONCLUSIONS: The limit of acceptable toxicity for standard chemotherapy has been reached in AML. Therefore, new therapeutic strategies are needed. Targeting the PI3K/Akt/mTOR signaling network with small molecule inhibitors, alone or in combinations with other drugs, may result in less toxic and more efficacious treatment of AML patients. Efforts to exploit selective inhibitors of the PI3K/Akt/mTOR pathway that show effectiveness and safety in the clinical setting are currently underway. FAU - Martelli, Alberto M AU - Martelli AM AD - Universita di Bologna, Dipartimento di Scienze Anatomiche Umane, 40126 Bologna, Italy. alberto.martelli@unibo.it FAU - Evangelisti, Camilla AU - Evangelisti C FAU - Chiarini, Francesca AU - Chiarini F FAU - Grimaldi, Cecilia AU - Grimaldi C FAU - Manzoli, Lucia AU - Manzoli L FAU - McCubrey, James A AU - McCubrey JA LA - eng GR - R01098195/PHS HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review PL - England TA - Expert Opin Investig Drugs JT - Expert opinion on investigational drugs JID - 9434197 RN - 0 (Antineoplastic Agents) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) RN - 0 (Small Molecule Libraries) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Animals MH - Antineoplastic Agents/administration & dosage/adverse effects/*pharmacology/therapeutic use MH - Clinical Trials as Topic MH - Drug Evaluation, Preclinical MH - Humans MH - Intracellular Signaling Peptides and Proteins/*metabolism/physiology MH - Leukemia, Myeloid, Acute/*drug therapy/enzymology/metabolism MH - Phosphatidylinositol 3-Kinases/physiology MH - *Phosphoinositide-3 Kinase Inhibitors MH - Protein Serine-Threonine Kinases/*metabolism/physiology MH - Proto-Oncogene Proteins c-akt/*antagonists & inhibitors/physiology MH - Signal Transduction/*drug effects MH - Small Molecule Libraries/administration & dosage/adverse effects/*pharmacology/therapeutic use MH - TOR Serine-Threonine Kinases RF - 177 EDAT- 2009/08/15 09:00 MHDA- 2010/02/26 06:00 CRDT- 2009/08/15 09:00 PHST- 2009/08/15 09:00 [entrez] PHST- 2009/08/15 09:00 [pubmed] PHST- 2010/02/26 06:00 [medline] AID - 10.1517/14728220903136775 [doi] PST - ppublish SO - Expert Opin Investig Drugs. 2009 Sep;18(9):1333-49. doi: 10.1517/14728220903136775.