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Salvianolate reduces neuronal apoptosis by suppressing OGD-induced microglial activation.

Identifieur interne : 000057 ( Main/Exploration ); précédent : 000056; suivant : 000058

Salvianolate reduces neuronal apoptosis by suppressing OGD-induced microglial activation.

Auteurs : Pengwei Luan [République populaire de Chine] ; Xinyue Ding [République populaire de Chine] ; Jiazhen Xu [République populaire de Chine] ; Lixian Jiang [République populaire de Chine] ; Yulan Xu [République populaire de Chine] ; Yuying Zhu [République populaire de Chine] ; Ruixiang Li [République populaire de Chine] ; Jiange Zhang [République populaire de Chine]

Source :

RBID : pubmed:32898527

Descripteurs français

English descriptors

Abstract

AIMS

The aim of this study was to investigate the mechanism of pro-inflammatory phenotype transformation of microglia induced by oxygen-glucose deprivation (OGD), and how salvianolate regulates the polarization of microglia to exert neuroprotective effects.

MAIN METHODS

The immunofluorescence and western blot experiments were used to verify the injury effect on neuronal cells after inflammatory polarization of microglia. Secondly, immunofluorescence staining and western blot were analyzed inflammatory phenotype of microglia and TLR4 signaling pathway after salvianolate treatment. RT-qPCR and ELISA assays were showed the levels of RNA and proteins of inflammatory factors in microglia. Finally, flow cytometry and western blot assay proved that salvianolate had a certain protective effect on neuronal injury after inhibiting the phenotype of microglia.

KEY FINDINGS

The OGD condition could promote inflammation and activate of TLR4 signal pathway in microglia, and the polarization of microglia triggered caspase-3 signal pathway of neuronal cell. The optimal concentrations of salvianolate were incubated with microglia under OGD condition, which could reduce the reactive oxygen species (ROS) expression (P = 0.002) and also regulate the activity of SOD, CAT and GSH-px enzymes (P < 0.05). Moreover, salvianolate treatment could inhibit TLR4 signal pathway (P = 0.012), suppress the pro-inflammatory phenotype of microglia in OGD condition (P = 0.018), and reduce the expression of IL-6 and TNF-α (P < 0.05). Finally, neuronal damage induced by microglia under OGD condition was reversed after administration of the microglia supernatant after salvianolate treatment.

SIGNIFICANCE

Salvianolate, as an antioxidant, plays a neuroprotective role by inhibiting the pro-inflammatory phenotype and decreasing the expression of ROS in microglia.


DOI: 10.1016/j.lfs.2020.118393
PubMed: 32898527


Affiliations:


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<term>Glucose (deficiency)</term>
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<term>Apoptose (MeSH)</term>
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<term>Espèces réactives de l'oxygène (métabolisme)</term>
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<p>
<b>AIMS</b>
</p>
<p>The aim of this study was to investigate the mechanism of pro-inflammatory phenotype transformation of microglia induced by oxygen-glucose deprivation (OGD), and how salvianolate regulates the polarization of microglia to exert neuroprotective effects.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>MAIN METHODS</b>
</p>
<p>The immunofluorescence and western blot experiments were used to verify the injury effect on neuronal cells after inflammatory polarization of microglia. Secondly, immunofluorescence staining and western blot were analyzed inflammatory phenotype of microglia and TLR4 signaling pathway after salvianolate treatment. RT-qPCR and ELISA assays were showed the levels of RNA and proteins of inflammatory factors in microglia. Finally, flow cytometry and western blot assay proved that salvianolate had a certain protective effect on neuronal injury after inhibiting the phenotype of microglia.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>KEY FINDINGS</b>
</p>
<p>The OGD condition could promote inflammation and activate of TLR4 signal pathway in microglia, and the polarization of microglia triggered caspase-3 signal pathway of neuronal cell. The optimal concentrations of salvianolate were incubated with microglia under OGD condition, which could reduce the reactive oxygen species (ROS) expression (P = 0.002) and also regulate the activity of SOD, CAT and GSH-px enzymes (P < 0.05). Moreover, salvianolate treatment could inhibit TLR4 signal pathway (P = 0.012), suppress the pro-inflammatory phenotype of microglia in OGD condition (P = 0.018), and reduce the expression of IL-6 and TNF-α (P < 0.05). Finally, neuronal damage induced by microglia under OGD condition was reversed after administration of the microglia supernatant after salvianolate treatment.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>SIGNIFICANCE</b>
</p>
<p>Salvianolate, as an antioxidant, plays a neuroprotective role by inhibiting the pro-inflammatory phenotype and decreasing the expression of ROS in microglia.</p>
</div>
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<DateCompleted>
<Year>2020</Year>
<Month>11</Month>
<Day>10</Day>
</DateCompleted>
<DateRevised>
<Year>2020</Year>
<Month>11</Month>
<Day>10</Day>
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<Journal>
<ISSN IssnType="Electronic">1879-0631</ISSN>
<JournalIssue CitedMedium="Internet">
<Volume>260</Volume>
<PubDate>
<Year>2020</Year>
<Month>Nov</Month>
<Day>01</Day>
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<Title>Life sciences</Title>
<ISOAbbreviation>Life Sci</ISOAbbreviation>
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<ArticleTitle>Salvianolate reduces neuronal apoptosis by suppressing OGD-induced microglial activation.</ArticleTitle>
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<Abstract>
<AbstractText Label="AIMS" NlmCategory="OBJECTIVE">The aim of this study was to investigate the mechanism of pro-inflammatory phenotype transformation of microglia induced by oxygen-glucose deprivation (OGD), and how salvianolate regulates the polarization of microglia to exert neuroprotective effects.</AbstractText>
<AbstractText Label="MAIN METHODS" NlmCategory="METHODS">The immunofluorescence and western blot experiments were used to verify the injury effect on neuronal cells after inflammatory polarization of microglia. Secondly, immunofluorescence staining and western blot were analyzed inflammatory phenotype of microglia and TLR4 signaling pathway after salvianolate treatment. RT-qPCR and ELISA assays were showed the levels of RNA and proteins of inflammatory factors in microglia. Finally, flow cytometry and western blot assay proved that salvianolate had a certain protective effect on neuronal injury after inhibiting the phenotype of microglia.</AbstractText>
<AbstractText Label="KEY FINDINGS" NlmCategory="RESULTS">The OGD condition could promote inflammation and activate of TLR4 signal pathway in microglia, and the polarization of microglia triggered caspase-3 signal pathway of neuronal cell. The optimal concentrations of salvianolate were incubated with microglia under OGD condition, which could reduce the reactive oxygen species (ROS) expression (P = 0.002) and also regulate the activity of SOD, CAT and GSH-px enzymes (P < 0.05). Moreover, salvianolate treatment could inhibit TLR4 signal pathway (P = 0.012), suppress the pro-inflammatory phenotype of microglia in OGD condition (P = 0.018), and reduce the expression of IL-6 and TNF-α (P < 0.05). Finally, neuronal damage induced by microglia under OGD condition was reversed after administration of the microglia supernatant after salvianolate treatment.</AbstractText>
<AbstractText Label="SIGNIFICANCE" NlmCategory="CONCLUSIONS">Salvianolate, as an antioxidant, plays a neuroprotective role by inhibiting the pro-inflammatory phenotype and decreasing the expression of ROS in microglia.</AbstractText>
<CopyrightInformation>Copyright © 2020 Elsevier Inc. All rights reserved.</CopyrightInformation>
</Abstract>
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<LastName>Luan</LastName>
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<LastName>Ding</LastName>
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