1
|
Dilly GA, Blednov YA, Warden AS, Ezerskiy L, Fleischer C, Plotkin JD, Patil S, Osterndorff-Kahanek EA, Mayfield J, Mayfield RD, Homanics GE, Messing RO. Knockdown of Tlr3 in dorsal striatum reduces ethanol consumption and acute functional tolerance in male mice. Brain Behav Immun 2024; 118:437-448. [PMID: 38499210 PMCID: PMC11007683 DOI: 10.1016/j.bbi.2024.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 03/05/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024] Open
Abstract
Systemic activation of toll-like receptor 3 (TLR3) signaling using poly(I:C), a TLR3 agonist, drives ethanol consumption in several rodent models, while global knockout of Tlr3 reduces drinking in C57BL/6J male mice. To determine if brain TLR3 pathways are involved in drinking behavior, we used CRISPR/Cas9 genome editing to generate a Tlr3 floxed (Tlr3F/F) mouse line. After sequence confirmation and functional validation of Tlr3 brain transcripts, we injected Tlr3F/F male mice with an adeno-associated virus expressing Cre recombinase (AAV5-CMV-Cre-GFP) to knockdown Tlr3 in the medial prefrontal cortex, nucleus accumbens, or dorsal striatum (DS). Only Tlr3 knockdown in the DS decreased two-bottle choice, every-other-day (2BC-EOD) ethanol consumption. DS-specific deletion of Tlr3 also increased intoxication and prevented acute functional tolerance to ethanol. In contrast, poly(I:C)-induced activation of TLR3 signaling decreased intoxication in male C57BL/6J mice, consistent with its ability to increase 2BC-EOD ethanol consumption in these mice. We also found that TLR3 was highly colocalized with DS neurons. AAV5-Cre transfection occurred predominantly in neurons, but there was minimal transfection in astrocytes and microglia. Collectively, our previous and current studies show that activating or inhibiting TLR3 signaling produces opposite effects on acute responses to ethanol and on ethanol consumption. While previous studies, however, used global knockout or systemic TLR3 activation (which alter peripheral and brain innate immune responses), the current results provide new evidence that brain TLR3 signaling regulates ethanol drinking. We propose that activation of TLR3 signaling in DS neurons increases ethanol consumption and that a striatal TLR3 pathway is a potential target to reduce excessive drinking.
Collapse
Affiliation(s)
- Geoffrey A Dilly
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Institute for Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neurology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, United States
| | - Yuri A Blednov
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - Anna S Warden
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - Lubov Ezerskiy
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Caleb Fleischer
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Jesse D Plotkin
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Shruti Patil
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | | | - Jody Mayfield
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - R Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Gregg E Homanics
- Departments of Anesthesiology & Perioperative Medicine, Neurobiology, and Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15261, United States
| | - Robert O Messing
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Institute for Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neurology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, United States.
| |
Collapse
|
2
|
Karch CM, Ezerskiy L, Redaelli V, Giovagnoli AR, Tiraboschi P, Pelliccioni G, Pelliccioni P, Kapetis D, D'Amato I, Piccoli E, Ferretti MG, Tagliavini F, Rossi G. Missense mutations in progranulin gene associated with frontotemporal lobar degeneration: study of pathogenetic features. Neurobiol Aging 2015; 38:215.e1-215.e12. [PMID: 26652843 DOI: 10.1016/j.neurobiolaging.2015.10.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/18/2015] [Accepted: 10/28/2015] [Indexed: 10/22/2022]
Abstract
GRN, the gene coding for the progranulin (PGRN) protein, was recognized as a gene linked to frontotemporal lobar degeneration (FTLD). The first mutations identified were null mutations giving rise to haploinsufficiency. Missense mutations were subsequently detected, but only a small subset has been functionally investigated. We identified missense mutations (C105Y, A199V, and R298H) in FTLD cases with family history and/or with low plasma PGRN levels. The aim of this study was to determine their pathogenicity. We performed functional studies, analyzing PGRN expression, secretion, and cleavage by elastase. GRN C105Y affected both secretion and elastase cleavage, likely representing a pathogenic mutation. GRN A199V did not alter the physiological properties of PGRN and GRN R298H produced only moderate effects on PGRN secretion, indicating that their pathogenicity is uncertain. In the absence of strong segregation data and neuropathological examinations, genetic, biomarker, and functional studies can be applied to an algorithm to assess the likelihood of pathogenicity for a mutation. This information can improve our understanding of the complex mechanisms by which GRN mutations lead to FTLD.
Collapse
Affiliation(s)
- Celeste M Karch
- Department of Psychiatry, Washington University School of Medicine, St Louis, MO, USA; Hope Center Program on Protein Aggregation and Neurodegeneration, Washington University School of Medicine, St Louis, MO, USA
| | - Lubov Ezerskiy
- Department of Psychiatry, Washington University School of Medicine, St Louis, MO, USA
| | - Veronica Redaelli
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Anna Rita Giovagnoli
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Pietro Tiraboschi
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | | | - Paolo Pelliccioni
- Division of Neurology, Geriatric Hospital, INRCA-IRCCS, Ancona, Italy
| | - Dimos Kapetis
- Bioinformatics Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Ilaria D'Amato
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Elena Piccoli
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Maria Giulia Ferretti
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Fabrizio Tagliavini
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Giacomina Rossi
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy.
| |
Collapse
|
4
|
Karch C, Hsu S, Ezerskiy L, Martinez R, Norton J, Cruchaga C, Goate AM. S2‐02‐04: Phospholipase D3 contributes to Alzheimer's disease risk via disruption in app trafficking and Aβ generation. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.07.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Simon Hsu
- Washington University in St. LouisSt. LouisMOUSA
| | | | | | | | | | - Alison M. Goate
- Icahn School of Medicine at Mount SinaiNew YorkNYUSA
- Washington UniversitySaint LouisMOUSA
| |
Collapse
|