PMID- 33066449 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201103 IS - 2072-6694 (Print) IS - 2072-6694 (Electronic) IS - 2072-6694 (Linking) VI - 12 IP - 10 DP - 2020 Oct 14 TI - Therapeutic Potential of PI3K/AKT/mTOR Pathway in Gastrointestinal Stromal Tumors: Rationale and Progress. LID - 10.3390/cancers12102972 [doi] LID - 2972 AB - Gastrointestinal stromal tumor (GIST) originates from interstitial cells of Cajal (ICCs) in the myenteric plexus of the gastrointestinal tract. Most GISTs arise due to mutations of KIT and PDGFRA gene activation, encoding the receptor tyrosine kinase (RTK). The clinical use of the RTK inhibitor imatinib has significantly improved the management of GIST patients; however, imatinib resistance remains a challenge. The phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway is a critical survival pathway for cell proliferation, apoptosis, autophagy and translation in neoplasms. Constitutive autophosphorylation of RTKs has an impact on the activation of the PI3K/AKT/mTOR pathway. In several preclinical and early-stage clinical trials PI3K/AKT/mTOR signaling inhibition has been considered as a promising targeted therapy strategy for GISTs. Various inhibitory drugs targeting different parts of the PI3K/AKT/mTOR pathway are currently being investigated in phase I and phase II clinical trials. This review highlights the progress for PI3K/AKT/mTOR-dependent mechanisms in GISTs, and explores the relationship between mTOR downstream signals, in particular, eukaryotic initiation factors (eIFs) and the development of GISTs, which may be instrumental for identifying novel therapeutic targets. FAU - Duan, Yi AU - Duan Y AD - Department of Pathology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China. FAU - Haybaeck, Johannes AU - Haybaeck J AD - Department of Pathology, Neuropathology and Molecular Pathology, Medical University of Innsbruck, 6020 Innsbruck, Austria. AD - Diagnostic & Research Center for Molecular BioMedicine, Institute of Pathology, Medical University of Graz, 8010 Graz, Austria. FAU - Yang, Zhihui AU - Yang Z AD - Department of Pathology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China. LA - eng PT - Journal Article PT - Review DEP - 20201014 PL - Switzerland TA - Cancers (Basel) JT - Cancers JID - 101526829 PMC - PMC7602170 OTO - NOTNLM OT - PI3K/AKT/mTOR OT - eIFs OT - gastrointestinal stromal tumors OT - inhibitor COIS- The authors declare no conflict of interest. EDAT- 2020/10/18 06:00 MHDA- 2020/10/18 06:01 PMCR- 2020/10/14 CRDT- 2020/10/17 01:04 PHST- 2020/09/06 00:00 [received] PHST- 2020/10/03 00:00 [revised] PHST- 2020/10/12 00:00 [accepted] PHST- 2020/10/17 01:04 [entrez] PHST- 2020/10/18 06:00 [pubmed] PHST- 2020/10/18 06:01 [medline] PHST- 2020/10/14 00:00 [pmc-release] AID - cancers12102972 [pii] AID - cancers-12-02972 [pii] AID - 10.3390/cancers12102972 [doi] PST - epublish SO - Cancers (Basel). 2020 Oct 14;12(10):2972. doi: 10.3390/cancers12102972.