Abstract | BACKGROUND: METHODS: One hundred and six male CD-1 mice were subjected to intrastriatal injection of bacterial collagenase or PBS. A68930 (DRD1 specific agonist) was administered by subcutaneous injection at 1 h after collagenase injection. Behavioral deficits and brain water content were assayed. The expression of Iba 1 and MPO levels were measured by immunofluorescence staining. The expressions of proteins in the DRD1/ interferon-beta (IFN-beta)/NLRP3 signaling pathway were evaluated by western blotting. RESULTS: Activation of the DRD1 by A68930 decreased brain edema and improved behavior at 24 and 72 h of ICH. A68930 inhibited partly the activation of microglia and the neutrophil infiltration after 24 h of ICH. IFN-beta, p-STAT1 increased while NLRP3, caspase 1, and IL-1beta decreased after A68930 administration in ICH mice. DRD1 antagonist and IFN-beta siRNA reversed effects of A68930 on neurological outcome and brain edema. DRD1 antagonist and IFN-beta siRNA blocked not only A68930-mediated increases of IFN-beta, p-STAT1 but also A68930-mediated decreases of NLRP3, caspase 1, and IL-1beta. CONCLUSIONS: DRD1 activation by A68930 improves neurological outcome through inhibition of NLRP3-mediated inflammation in ICH mice.
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Authors | Tian Wang, Derek Nowrangi, Lingyan Yu, Tai Lu, Jiping Tang, Bing Han, Yuxin Ding, Fenghua Fu, John H Zhang |
Journal | Journal of neuroinflammation
(J Neuroinflammation)
Vol. 15
Issue 1
Pg. 2
(Jan 04 2018)
ISSN: 1742-2094 [Electronic] England |
PMID | 29301581
(Publication Type: Journal Article)
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Chemical References |
- Dopamine Agonists
- Dopamine Antagonists
- Drd1 protein, mouse
- NLR Family, Pyrin Domain-Containing 3 Protein
- Nlrp3 protein, mouse
- RNA, Small Interfering
- Receptors, Dopamine D1
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Topics |
- Animals
- Brain Edema
(metabolism, prevention & control)
- Cerebral Hemorrhage
(metabolism, prevention & control)
- Dopamine Agonists
(pharmacology, therapeutic use)
- Dopamine Antagonists
(pharmacology)
- Male
- Mice
- NLR Family, Pyrin Domain-Containing 3 Protein
(antagonists & inhibitors, metabolism)
- RNA, Small Interfering
(pharmacology)
- Random Allocation
- Receptors, Dopamine D1
(agonists, antagonists & inhibitors, metabolism)
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