PMID- 35923547 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230213 IS - 1663-4365 (Print) IS - 1663-4365 (Electronic) IS - 1663-4365 (Linking) VI - 14 DP - 2022 TI - Tauopathy and Epilepsy Comorbidities and Underlying Mechanisms. PG - 903973 LID - 10.3389/fnagi.2022.903973 [doi] LID - 903973 AB - Tau is a microtubule-associated protein known to bind and promote assembly of microtubules in neurons under physiological conditions. However, under pathological conditions, aggregation of hyperphosphorylated tau causes neuronal toxicity, neurodegeneration, and resulting tauopathies like Alzheimer's disease (AD). Clinically, patients with tauopathies present with either dementia, movement disorders, or a combination of both. The deposition of hyperphosphorylated tau in the brain is also associated with epilepsy and network hyperexcitability in a variety of neurological diseases. Furthermore, pharmacological and genetic targeting of tau-based mechanisms can have anti-seizure effects. Suppressing tau phosphorylation decreases seizure activity in acquired epilepsy models while reducing or ablating tau attenuates network hyperexcitability in both Alzheimer's and epilepsy models. However, it remains unclear whether tauopathy and epilepsy comorbidities are mediated by convergent mechanisms occurring upstream of epileptogenesis and tau aggregation, by feedforward mechanisms between the two, or simply by coincident processes. In this review, we investigate the relationship between tauopathies and seizure disorders, including temporal lobe epilepsy (TLE), post-traumatic epilepsy (PTE), autism spectrum disorder (ASD), Dravet syndrome, Nodding syndrome, Niemann-Pick type C disease (NPC), Lafora disease, focal cortical dysplasia, and tuberous sclerosis complex. We also explore potential mechanisms implicating the role of tau kinases and phosphatases as well as the mammalian target of rapamycin (mTOR) in the promotion of co-pathology. Understanding the role of these co-pathologies could lead to new insights and therapies targeting both epileptogenic mechanisms and cognitive decline. CI - Copyright (c) 2022 Hwang, Vaknalli, Addo-Osafo, Vicente and Vossel. FAU - Hwang, Kaylin AU - Hwang K AD - Mary S. Easton Center for Alzheimer's Research and Care, Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States. FAU - Vaknalli, Rahil N AU - Vaknalli RN AD - Mary S. Easton Center for Alzheimer's Research and Care, Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States. FAU - Addo-Osafo, Kwaku AU - Addo-Osafo K AD - Mary S. Easton Center for Alzheimer's Research and Care, Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States. FAU - Vicente, Mariane AU - Vicente M AD - Mary S. Easton Center for Alzheimer's Research and Care, Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States. FAU - Vossel, Keith AU - Vossel K AD - Mary S. Easton Center for Alzheimer's Research and Care, Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States. LA - eng GR - R01 AG058820/AG/NIA NIH HHS/United States GR - R56 AG074473/AG/NIA NIH HHS/United States PT - Journal Article PT - Review DEP - 20220718 PL - Switzerland TA - Front Aging Neurosci JT - Frontiers in aging neuroscience JID - 101525824 PMC - PMC9340804 OTO - NOTNLM OT - cognitive decline OT - epilepsy OT - hyperexcitability OT - hyperphosphorylation of tau OT - mTOR OT - tau COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/08/05 06:00 MHDA- 2022/08/05 06:01 PMCR- 2022/01/01 CRDT- 2022/08/04 02:19 PHST- 2022/03/24 00:00 [received] PHST- 2022/06/22 00:00 [accepted] PHST- 2022/08/04 02:19 [entrez] PHST- 2022/08/05 06:00 [pubmed] PHST- 2022/08/05 06:01 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fnagi.2022.903973 [doi] PST - epublish SO - Front Aging Neurosci. 2022 Jul 18;14:903973. doi: 10.3389/fnagi.2022.903973. eCollection 2022.