Genistein-3'-sodium sulfonate Attenuates Neuroinflammation in Stroke Rats by Down-Regulating Microglial M1 Polarization through α7nAChR-NF-κB Signaling Pathway

Microglial M1 depolarization mediated prolonged inflammation contributing to brain injury in ischemic stroke. Our previous study revealed that Genistein-3'-sodium sulfonate (GSS) exerted neuroprotective effects in ischemic stroke. This study aimed to explore whether GSS protected against brain...

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Veröffentlicht in:International journal of biological sciences 2021, Vol.17 (4), p.1088-1100
Hauptverfasser: Liu, Chaoming, Liu, Song, Xiong, Lijiao, Zhang, Limei, Li, Xiao, Cao, Xingling, Xue, Jinhua, Li, Liangdong, Huang, Cheng, Huang, Zhihua
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container_issue 4
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container_title International journal of biological sciences
container_volume 17
creator Liu, Chaoming
Liu, Song
Xiong, Lijiao
Zhang, Limei
Li, Xiao
Cao, Xingling
Xue, Jinhua
Li, Liangdong
Huang, Cheng
Huang, Zhihua
description Microglial M1 depolarization mediated prolonged inflammation contributing to brain injury in ischemic stroke. Our previous study revealed that Genistein-3'-sodium sulfonate (GSS) exerted neuroprotective effects in ischemic stroke. This study aimed to explore whether GSS protected against brain injury in ischemic stroke by regulating microglial M1 depolarization and its underlying mechanisms. We established transient middle cerebral artery occlusion and reperfusion (tMCAO) model in rats and used lipopolysaccharide (LPS)-stimulated BV2 microglial cells as model. Our results showed that GSS treatment significantly reduced the brain infarcted volume and improved the neurological function in tMCAO rats. Meanwhile, GSS treatment also dramatically reduced microglia M1 depolarization and IL-1β level, reversed α7nAChR expression, and inhibited the activation of NF-κB signaling in the ischemic penumbra brain regions. These effects of GSS were further verified in LPS-induced M1 depolarization of BV2 cells. Furthermore, pretreatment of α7nAChR inhibitor (α-BTX) significantly restrained the neuroprotective effect of GSS treatment in tMCAO rats. α-BTX also blunted the regulating effects of GSS on neuroinflammation, M1 depolarization and NF-κB signaling activation. This study demonstrates that GSS protects against brain injury in ischemic stroke by reducing microglia M1 depolarization to suppress neuroinflammation in peri-infarcted brain regions through upregulating α7nAChR and thereby inhibition of NF-κB signaling. Our findings uncover a potential molecular mechanism for GSS treatment in ischemic stroke.
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Our previous study revealed that Genistein-3'-sodium sulfonate (GSS) exerted neuroprotective effects in ischemic stroke. This study aimed to explore whether GSS protected against brain injury in ischemic stroke by regulating microglial M1 depolarization and its underlying mechanisms. We established transient middle cerebral artery occlusion and reperfusion (tMCAO) model in rats and used lipopolysaccharide (LPS)-stimulated BV2 microglial cells as model. Our results showed that GSS treatment significantly reduced the brain infarcted volume and improved the neurological function in tMCAO rats. Meanwhile, GSS treatment also dramatically reduced microglia M1 depolarization and IL-1β level, reversed α7nAChR expression, and inhibited the activation of NF-κB signaling in the ischemic penumbra brain regions. These effects of GSS were further verified in LPS-induced M1 depolarization of BV2 cells. Furthermore, pretreatment of α7nAChR inhibitor (α-BTX) significantly restrained the neuroprotective effect of GSS treatment in tMCAO rats. α-BTX also blunted the regulating effects of GSS on neuroinflammation, M1 depolarization and NF-κB signaling activation. This study demonstrates that GSS protects against brain injury in ischemic stroke by reducing microglia M1 depolarization to suppress neuroinflammation in peri-infarcted brain regions through upregulating α7nAChR and thereby inhibition of NF-κB signaling. Our findings uncover a potential molecular mechanism for GSS treatment in ischemic stroke.</description><identifier>ISSN: 1449-2288</identifier><identifier>EISSN: 1449-2288</identifier><identifier>DOI: 10.7150/ijbs.56800</identifier><identifier>PMID: 33867831</identifier><language>eng</language><publisher>Australia: Ivyspring International Publisher Pty Ltd</publisher><subject>alpha7 Nicotinic Acetylcholine Receptor - metabolism ; Animals ; Blood-brain barrier ; Brain ; Brain Infarction - prevention &amp; control ; Brain injury ; Cell Line ; Cerebral blood flow ; Cytokines ; Depolarization ; Drug Evaluation, Preclinical ; Estrogens ; Experiments ; Genistein ; Genistein - analogs &amp; derivatives ; Genistein - pharmacology ; Genistein - therapeutic use ; Genotype &amp; phenotype ; Head injuries ; IL-1β ; Inflammation ; Injury prevention ; Ischemia ; Ischemic Stroke - drug therapy ; Ischemic Stroke - metabolism ; Laboratories ; Lipopolysaccharides ; Male ; Mice ; Microglia ; Microglia - drug effects ; Microglial cells ; Neuroinflammatory Diseases - prevention &amp; control ; Neuroprotection ; NF-kappa B - metabolism ; NF-κB protein ; Occlusion ; Penicillin ; Phosphorylation ; Rats ; Rats, Sprague-Dawley ; Reperfusion ; Research Paper ; Signal transduction ; Signal Transduction - drug effects ; Signaling ; Sodium ; Stroke ; Sulfonates ; Traumatic brain injury ; Tumor necrosis factor-TNF ; Veins &amp; arteries</subject><ispartof>International journal of biological sciences, 2021, Vol.17 (4), p.1088-1100</ispartof><rights>The author(s).</rights><rights>2021. 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Our previous study revealed that Genistein-3'-sodium sulfonate (GSS) exerted neuroprotective effects in ischemic stroke. This study aimed to explore whether GSS protected against brain injury in ischemic stroke by regulating microglial M1 depolarization and its underlying mechanisms. We established transient middle cerebral artery occlusion and reperfusion (tMCAO) model in rats and used lipopolysaccharide (LPS)-stimulated BV2 microglial cells as model. Our results showed that GSS treatment significantly reduced the brain infarcted volume and improved the neurological function in tMCAO rats. Meanwhile, GSS treatment also dramatically reduced microglia M1 depolarization and IL-1β level, reversed α7nAChR expression, and inhibited the activation of NF-κB signaling in the ischemic penumbra brain regions. These effects of GSS were further verified in LPS-induced M1 depolarization of BV2 cells. Furthermore, pretreatment of α7nAChR inhibitor (α-BTX) significantly restrained the neuroprotective effect of GSS treatment in tMCAO rats. α-BTX also blunted the regulating effects of GSS on neuroinflammation, M1 depolarization and NF-κB signaling activation. This study demonstrates that GSS protects against brain injury in ischemic stroke by reducing microglia M1 depolarization to suppress neuroinflammation in peri-infarcted brain regions through upregulating α7nAChR and thereby inhibition of NF-κB signaling. Our findings uncover a potential molecular mechanism for GSS treatment in ischemic stroke.</description><subject>alpha7 Nicotinic Acetylcholine Receptor - metabolism</subject><subject>Animals</subject><subject>Blood-brain barrier</subject><subject>Brain</subject><subject>Brain Infarction - prevention &amp; control</subject><subject>Brain injury</subject><subject>Cell Line</subject><subject>Cerebral blood flow</subject><subject>Cytokines</subject><subject>Depolarization</subject><subject>Drug Evaluation, Preclinical</subject><subject>Estrogens</subject><subject>Experiments</subject><subject>Genistein</subject><subject>Genistein - analogs &amp; derivatives</subject><subject>Genistein - pharmacology</subject><subject>Genistein - therapeutic use</subject><subject>Genotype &amp; phenotype</subject><subject>Head injuries</subject><subject>IL-1β</subject><subject>Inflammation</subject><subject>Injury prevention</subject><subject>Ischemia</subject><subject>Ischemic Stroke - drug therapy</subject><subject>Ischemic Stroke - metabolism</subject><subject>Laboratories</subject><subject>Lipopolysaccharides</subject><subject>Male</subject><subject>Mice</subject><subject>Microglia</subject><subject>Microglia - drug effects</subject><subject>Microglial cells</subject><subject>Neuroinflammatory Diseases - prevention &amp; 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Our previous study revealed that Genistein-3'-sodium sulfonate (GSS) exerted neuroprotective effects in ischemic stroke. This study aimed to explore whether GSS protected against brain injury in ischemic stroke by regulating microglial M1 depolarization and its underlying mechanisms. We established transient middle cerebral artery occlusion and reperfusion (tMCAO) model in rats and used lipopolysaccharide (LPS)-stimulated BV2 microglial cells as model. Our results showed that GSS treatment significantly reduced the brain infarcted volume and improved the neurological function in tMCAO rats. Meanwhile, GSS treatment also dramatically reduced microglia M1 depolarization and IL-1β level, reversed α7nAChR expression, and inhibited the activation of NF-κB signaling in the ischemic penumbra brain regions. These effects of GSS were further verified in LPS-induced M1 depolarization of BV2 cells. Furthermore, pretreatment of α7nAChR inhibitor (α-BTX) significantly restrained the neuroprotective effect of GSS treatment in tMCAO rats. α-BTX also blunted the regulating effects of GSS on neuroinflammation, M1 depolarization and NF-κB signaling activation. This study demonstrates that GSS protects against brain injury in ischemic stroke by reducing microglia M1 depolarization to suppress neuroinflammation in peri-infarcted brain regions through upregulating α7nAChR and thereby inhibition of NF-κB signaling. Our findings uncover a potential molecular mechanism for GSS treatment in ischemic stroke.</abstract><cop>Australia</cop><pub>Ivyspring International Publisher Pty Ltd</pub><pmid>33867831</pmid><doi>10.7150/ijbs.56800</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record>
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subjects alpha7 Nicotinic Acetylcholine Receptor - metabolism
Animals
Blood-brain barrier
Brain
Brain Infarction - prevention & control
Brain injury
Cell Line
Cerebral blood flow
Cytokines
Depolarization
Drug Evaluation, Preclinical
Estrogens
Experiments
Genistein
Genistein - analogs & derivatives
Genistein - pharmacology
Genistein - therapeutic use
Genotype & phenotype
Head injuries
IL-1β
Inflammation
Injury prevention
Ischemia
Ischemic Stroke - drug therapy
Ischemic Stroke - metabolism
Laboratories
Lipopolysaccharides
Male
Mice
Microglia
Microglia - drug effects
Microglial cells
Neuroinflammatory Diseases - prevention & control
Neuroprotection
NF-kappa B - metabolism
NF-κB protein
Occlusion
Penicillin
Phosphorylation
Rats
Rats, Sprague-Dawley
Reperfusion
Research Paper
Signal transduction
Signal Transduction - drug effects
Signaling
Sodium
Stroke
Sulfonates
Traumatic brain injury
Tumor necrosis factor-TNF
Veins & arteries
title Genistein-3'-sodium sulfonate Attenuates Neuroinflammation in Stroke Rats by Down-Regulating Microglial M1 Polarization through α7nAChR-NF-κB Signaling Pathway
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