PMID- 28739680 OWN - NLM STAT- MEDLINE DCOM- 20170810 LR - 20201116 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 37 IP - 8 DP - 2017 Aug TI - BDNF: An Oncogene or Tumor Suppressor? PG - 3983-3990 AB - Neurotrophins are a family of growth factors that are vital to the proper development of the central nervous system. Their effects on cells are governed by the expression and activation of the tyrosine kinase receptors TrkA, TrkB and TrkC. TrkB has been immensely implicated in mediating neuronal migration, development and differentiation. It has also been shown to protect several neuronal cell types from an array of cytotoxic stressors after activation by its conjugate ligand brain-derived neurotrophic factor (BDNF). Over the past two decades, it has been shown that TrkB and BDNF are up-regulated in many types of cancers, conferring aggressive phenotypes underpinned by their resistance to several standard chemotherapeutic agents. This resistance to chemotherapy is modulated by the downstream targets of the TrkB receptor which include the well-characterized PI3K /Akt growth pathway, a hallmark of uncontrolled cancer cell growth and proliferation. Pre-clinical efforts to develop inhibitors of this receptor are promising, and such inhibitors also seem to sensitize cancer cells to standard chemotherapies. However, new evidence suggests that BDNF overexpression in the hypothalamus has immunoaugmenting properties, eliciting an increased anti-tumor immune response and reducing the activity of several proteins that would normally confer resistance to chemotherapeutic agents. In the current work, we provide a global analysis of the physiological consequences of TrkB receptor activation in vitro and discuss the dynamic consequences of TrkB activation in vivo. Finally, we propose a clinically-feasible option for increasing BDNF expression in the hypothalamus to more readily utilize the oncolytic effects of BDNF. CI - Copyright(c) 2017, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Radin, Daniel P AU - Radin DP AD - Department of Pharmacology, Stony Brook University School of Medicine, Stony Brook, NY, U.S.A. danradin1@gmail.com. FAU - Patel, Parth AU - Patel P AD - College of Arts and Sciences, New York University, New York City, NY, U.S.A. LA - eng PT - Journal Article PT - Review PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Membrane Glycoproteins) RN - 0 (NTRK1 protein, human) RN - 7171WSG8A2 (BDNF protein, human) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) RN - EC 2.7.10.1 (Receptor, trkA) RN - EC 2.7.10.1 (Receptor, trkB) RN - EC 2.7.10.1 (Receptor, trkC) RN - EC 2.7.10.1 (tropomyosin-related kinase-B, human) SB - IM MH - Brain-Derived Neurotrophic Factor/biosynthesis/*genetics MH - Drug Resistance, Neoplasm/genetics MH - Gene Expression Regulation, Neoplastic MH - Genes, Tumor Suppressor MH - Humans MH - Hypothalamus/metabolism MH - Membrane Glycoproteins/biosynthesis/*genetics MH - Neoplasms/*drug therapy/*genetics/pathology MH - Oncogenes/genetics MH - Protein-Tyrosine Kinases/biosynthesis/*genetics MH - Receptor, trkA/biosynthesis/genetics MH - Receptor, trkB MH - Receptor, trkC/biosynthesis/genetics OTO - NOTNLM OT - BDNF OT - EGFR OT - PI3K OT - RhoA OT - Trkb OT - chemotherapeutic resistance OT - review EDAT- 2017/07/26 06:00 MHDA- 2017/08/11 06:00 CRDT- 2017/07/26 06:00 PHST- 2017/06/01 00:00 [received] PHST- 2017/06/16 00:00 [revised] PHST- 2017/06/19 00:00 [accepted] PHST- 2017/07/26 06:00 [entrez] PHST- 2017/07/26 06:00 [pubmed] PHST- 2017/08/11 06:00 [medline] AID - 37/8/3983 [pii] AID - 10.21873/anticanres.11783 [doi] PST - ppublish SO - Anticancer Res. 2017 Aug;37(8):3983-3990. doi: 10.21873/anticanres.11783.