PMID- 33161784 OWN - NLM STAT- MEDLINE DCOM- 20211203 LR - 20220920 IS - 1744-8360 (Electronic) IS - 1473-7175 (Print) IS - 1473-7175 (Linking) VI - 21 IP - 1 DP - 2021 Jan TI - Metformin as a potential therapeutic for neurological disease: mobilizing AMPK to repair the nervous system. PG - 45-63 LID - 10.1080/14737175.2021.1847645 [doi] AB - Introduction: Metformin is currently first line therapy for type 2 diabetes (T2D). The mechanism of action of metformin involves activation of AMP-activated protein kinase (AMPK) to enhance mitochondrial function (for example, biogenesis, refurbishment and dynamics) and autophagy. Many neurodegenerative diseases of the central and peripheral nervous systems arise from metabolic failure and toxic protein aggregation where activated AMPK could prove protective. Areas covered: The authors review literature on metformin treatment in Parkinson's disease, Huntington's disease and other neurological diseases of the CNS along with neuroprotective effects of AMPK activation and suppression of the mammalian target of rapamycin (mTOR) pathway on peripheral neuropathy and neuropathic pain. The authors compare the efficacy of metformin with the actions of resveratrol. Expert opinion: Metformin, through activation of AMPK and autophagy, can enhance neuronal bioenergetics, promote nerve repair and reduce toxic protein aggregates in neurological diseases. A long history of safe use in humans should encourage development of metformin and other AMPK activators in preclinical and clinical research. Future studies in animal models of neurological disease should strive to further dissect in a mechanistic manner the pathways downstream from metformin-dependent AMPK activation, and to further investigate mTOR dependent and independent signaling pathways driving neuroprotection. FAU - Demare, Sarah AU - Demare S AD - Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada. AD - Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada. FAU - Kothari, Asha AU - Kothari A AD - Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada. AD - Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada. FAU - Calcutt, Nigel A AU - Calcutt NA AD - Department of Pathology, University of California San Diego , La Jolla, CA, USA. FAU - Fernyhough, Paul AU - Fernyhough P AD - Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre , Winnipeg, MB, Canada. AD - Department of Pharmacology and Therapeutics, University of Manitoba , Winnipeg, MB, Canada. LA - eng GR - R01 NS081082/NS/NINDS NIH HHS/United States GR - MOP-130282/CIHR/Canada PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20201204 PL - England TA - Expert Rev Neurother JT - Expert review of neurotherapeutics JID - 101129944 RN - 0 (Neuroprotective Agents) RN - 9100L32L2N (Metformin) RN - EC 2.7.11.31 (AMP-Activated Protein Kinases) SB - IM MH - AMP-Activated Protein Kinases MH - Animals MH - *Diabetes Mellitus, Type 2 MH - Humans MH - *Metformin/therapeutic use MH - Neurons MH - *Neuroprotective Agents/therapeutic use PMC - PMC9482886 MID - NIHMS1648228 OTO - NOTNLM OT - AMP-activated protein kinase (AMPK) OT - PGC-1alpha OT - autophagy OT - axon regeneration OT - diabetes OT - mTOR OT - mitochondria OT - neurodegenerative disease OT - neuropathic pain OT - neuropathy COIS- Declaration of interest The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or conflict with the subject matter or materials discussed in this manuscript apart from those disclosed. EDAT- 2020/11/10 06:00 MHDA- 2021/12/15 06:00 PMCR- 2022/09/19 CRDT- 2020/11/09 05:21 PHST- 2020/11/10 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] PHST- 2020/11/09 05:21 [entrez] PHST- 2022/09/19 00:00 [pmc-release] AID - 10.1080/14737175.2021.1847645 [doi] PST - ppublish SO - Expert Rev Neurother. 2021 Jan;21(1):45-63. doi: 10.1080/14737175.2021.1847645. Epub 2020 Dec 4.