Effect of Anti-inflammatory Treatment with AMD3100 and CX3CR1 Deficiency on GABAA Receptor Subunit and Expression of Glutamate Decarboxylase Isoforms After Stroke
(2021) In Molecular Neurobiology 58(11). p.5876-5889- Abstract
Following stroke, attenuation of detrimental inflammatory pathways might be a promising strategy to improve long-term outcome. In particular, cascades driven by pro-inflammatory chemokines interact with neurotransmitter systems such as the GABAergic system. This crosstalk might be of relevance for mechanisms of neuronal plasticity, however, detailed studies are lacking. The purpose of this study was to determine if treatment with 1,1′-[1,4-phenylenebis(methylene)]bis[1,4,8,11-tetraazacyclotetradecane] (AMD3100), an antagonist to the C-X-C chemokine receptor type 4 (CXCR4) and partial allosteric agonist to CXCR7 (AMD3100) alone or in combination with C-X3-C chemokine receptor type 1 (CX3CR1) deficiency, affect the expression of... (More)
Following stroke, attenuation of detrimental inflammatory pathways might be a promising strategy to improve long-term outcome. In particular, cascades driven by pro-inflammatory chemokines interact with neurotransmitter systems such as the GABAergic system. This crosstalk might be of relevance for mechanisms of neuronal plasticity, however, detailed studies are lacking. The purpose of this study was to determine if treatment with 1,1′-[1,4-phenylenebis(methylene)]bis[1,4,8,11-tetraazacyclotetradecane] (AMD3100), an antagonist to the C-X-C chemokine receptor type 4 (CXCR4) and partial allosteric agonist to CXCR7 (AMD3100) alone or in combination with C-X3-C chemokine receptor type 1 (CX3CR1) deficiency, affect the expression of GABAA subunits and glutamate decarboxylase (GAD) isoforms. Heterozygous, CX3CR1-deficient mice and wild-type littermates were subjected to photothrombosis (PT). Treatment with AMD3100 (0.5 mg/kg twice daily i.p.) was administered starting from day 2 after induction of PT until day 14 after the insult. At this time point, GABAA receptor subunits (α3, β3, δ), GAD65 and GAD67, and CXCR4 were analyzed from the peri-infarct tissue and homotypic brain regions of the contralateral hemisphere by quantitative real-time PCR and Western Blot. Fourteen days after PT, CX3CR1 deficiency resulted in a significant decrease of the three GABAA receptor subunits in both the lesioned and the contralateral hemisphere compared to sham-operated mice. Treatment with AMD3100 promoted the down-regulation of GABAA subunits and GAD67 in the ipsilateral peri-infarct area, while the β3 subunit and the GAD isoforms were up-regulated in homotypic regions of the contralateral cortex. Changes in GABAA receptor subunits and GABA synthesis suggest that the CXCR4/7 and CX3CR1 signaling pathways are involved in the regulation of GABAergic neurotransmission in the post-ischemic brain.
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- author
- Michalettos, Georgios LU ; Walter, Helene L. ; Antunes, Ana Rita Pombo LU ; Wieloch, Tadeusz LU ; Talhada, Daniela LU and Ruscher, Karsten LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- AMD3100, CX3CR1, CXCR4, GABA, Glutamate decarboxylase, Inhibition, Neuronal plasticity, Stroke recovery
- in
- Molecular Neurobiology
- volume
- 58
- issue
- 11
- pages
- 5876 - 5889
- publisher
- Humana Press
- external identifiers
-
- scopus:85113139506
- pmid:34417725
- ISSN
- 0893-7648
- DOI
- 10.1007/s12035-021-02510-x
- language
- English
- LU publication?
- yes
- id
- c7721d74-ce1f-41b0-a807-eda787882864
- date added to LUP
- 2021-09-03 14:37:25
- date last changed
- 2025-04-04 14:51:01
@article{c7721d74-ce1f-41b0-a807-eda787882864,
abstract = {{<p>Following stroke, attenuation of detrimental inflammatory pathways might be a promising strategy to improve long-term outcome. In particular, cascades driven by pro-inflammatory chemokines interact with neurotransmitter systems such as the GABAergic system. This crosstalk might be of relevance for mechanisms of neuronal plasticity, however, detailed studies are lacking. The purpose of this study was to determine if treatment with 1,1′-[1,4-phenylenebis(methylene)]bis[1,4,8,11-tetraazacyclotetradecane] (AMD3100), an antagonist to the C-X-C chemokine receptor type 4 (CXCR4) and partial allosteric agonist to CXCR7 (AMD3100) alone or in combination with C-X3-C chemokine receptor type 1 (CX3CR1) deficiency, affect the expression of GABA<sub>A</sub> subunits and glutamate decarboxylase (GAD) isoforms. Heterozygous, CX3CR1-deficient mice and wild-type littermates were subjected to photothrombosis (PT). Treatment with AMD3100 (0.5 mg/kg twice daily i.p.) was administered starting from day 2 after induction of PT until day 14 after the insult. At this time point, GABA<sub>A</sub> receptor subunits (α3, β3, δ), GAD65 and GAD67, and CXCR4 were analyzed from the peri-infarct tissue and homotypic brain regions of the contralateral hemisphere by quantitative real-time PCR and Western Blot. Fourteen days after PT, CX3CR1 deficiency resulted in a significant decrease of the three GABA<sub>A</sub> receptor subunits in both the lesioned and the contralateral hemisphere compared to sham-operated mice. Treatment with AMD3100 promoted the down-regulation of GABA<sub>A</sub> subunits and GAD67 in the ipsilateral peri-infarct area, while the β3 subunit and the GAD isoforms were up-regulated in homotypic regions of the contralateral cortex. Changes in GABA<sub>A</sub> receptor subunits and GABA synthesis suggest that the CXCR4/7 and CX3CR1 signaling pathways are involved in the regulation of GABAergic neurotransmission in the post-ischemic brain.</p>}},
author = {{Michalettos, Georgios and Walter, Helene L. and Antunes, Ana Rita Pombo and Wieloch, Tadeusz and Talhada, Daniela and Ruscher, Karsten}},
issn = {{0893-7648}},
keywords = {{AMD3100; CX3CR1; CXCR4; GABA; Glutamate decarboxylase; Inhibition; Neuronal plasticity; Stroke recovery}},
language = {{eng}},
number = {{11}},
pages = {{5876--5889}},
publisher = {{Humana Press}},
series = {{Molecular Neurobiology}},
title = {{Effect of Anti-inflammatory Treatment with AMD3100 and CX<sub>3</sub>CR1 Deficiency on GABA<sub>A</sub> Receptor Subunit and Expression of Glutamate Decarboxylase Isoforms After Stroke}},
url = {{http://dx.doi.org/10.1007/s12035-021-02510-x}},
doi = {{10.1007/s12035-021-02510-x}},
volume = {{58}},
year = {{2021}},
}