PMID- 30669372 OWN - NLM STAT- MEDLINE DCOM- 20190501 LR - 20230528 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 20 IP - 2 DP - 2019 Jan 18 TI - Targeting PI3K Signaling in Acute Lymphoblastic Leukemia. LID - 10.3390/ijms20020412 [doi] LID - 412 AB - Adhesion of acute lymphoblastic leukemia (ALL) cells to bone marrow stroma cells triggers intracellular signals regulating cell-adhesion-mediated drug resistance (CAM-DR). Stromal cell protection of ALL cells has been shown to require active AKT. In chronic lymphocytic leukemia (CLL), adhesion-mediated activation of the PI3K/AKT pathway is reported. A novel FDA-approved PI3Kdelta inhibitor, CAL-101/idelalisib, leads to downregulation of p-AKT and increased apoptosis of CLL cells. Recently, two additional PI3K inhibitors have received FDA approval. As the PI3K/AKT pathway is also implicated in adhesion-mediated survival of ALL cells, PI3K inhibitors have been evaluated preclinically in ALL. However, PI3K inhibition has yet to be approved for clinical use in ALL. Here, we review the role of PI3K in normal hematopoietic cells, and in ALL. We focus on summarizing targeting strategies of PI3K in ALL. FAU - Sanchez, Vanessa Edna AU - Sanchez VE AD - Department of Pathology, Keck School of Medicine of University of Southern California, Los Angeles, CA 90033, USA. vanesses@usc.edu. AD - Department of Pediatrics, Division of Hematology, Oncology, Blood and Marrow Transplantation, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA 90027, USA. vanesses@usc.edu. FAU - Nichols, Cydney AU - Nichols C AUID- ORCID: 0000-0003-4024-5339 AD - New York Medical College School of Medicine, Valhalla, NY 10595, USA. cnichols5@student.nymc.edu. FAU - Kim, Hye Na AU - Kim HN AD - Department of Pediatrics, Division of Hematology, Oncology, Blood and Marrow Transplantation, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA 90027, USA. hyekim@chla.usc.edu. FAU - Gang, Eun Ji AU - Gang EJ AD - Department of Pediatrics, Division of Hematology, Oncology, Blood and Marrow Transplantation, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA 90027, USA. vanesses@usc.edu. FAU - Kim, Yong-Mi AU - Kim YM AD - Department of Pediatrics, Division of Hematology, Oncology, Blood and Marrow Transplantation, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA 90027, USA. ymkim@chla.usc.edu. LA - eng GR - R01 CA172896/CA/NCI NIH HHS/United States GR - R25 CA225513/CA/NCI NIH HHS/United States GR - CA172896/NH/NIH HHS/United States PT - Journal Article PT - Review DEP - 20190118 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Antineoplastic Agents) RN - 0 (Isoenzymes) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) SB - IM MH - Animals MH - Antineoplastic Agents/pharmacology/*therapeutic use MH - Antineoplastic Combined Chemotherapy Protocols/adverse effects/therapeutic use MH - B-Lymphocytes/drug effects/metabolism MH - Clinical Trials as Topic MH - Drug Evaluation, Preclinical MH - Drug Resistance, Neoplasm MH - Humans MH - Isoenzymes MH - *Molecular Targeted Therapy/adverse effects/methods MH - Phosphatidylinositol 3-Kinases/*metabolism MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis/*drug therapy/*metabolism/mortality MH - Proto-Oncogene Proteins c-akt/metabolism MH - Signal Transduction/*drug effects MH - Treatment Outcome PMC - PMC6358886 OTO - NOTNLM OT - PI3K/AKT OT - PI3Kdelta OT - acute lymphoblastic leukemia (ALL) OT - cell adhesion mediated drug resistance (CAM-DR) COIS- The authors declare no conflict of interest. EDAT- 2019/01/24 06:00 MHDA- 2019/05/02 06:00 PMCR- 2019/01/01 CRDT- 2019/01/24 06:00 PHST- 2018/12/14 00:00 [received] PHST- 2019/01/13 00:00 [revised] PHST- 2019/01/14 00:00 [accepted] PHST- 2019/01/24 06:00 [entrez] PHST- 2019/01/24 06:00 [pubmed] PHST- 2019/05/02 06:00 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - ijms20020412 [pii] AID - ijms-20-00412 [pii] AID - 10.3390/ijms20020412 [doi] PST - epublish SO - Int J Mol Sci. 2019 Jan 18;20(2):412. doi: 10.3390/ijms20020412.