The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome

Agathisflavone, purified from <i>Cenostigma pyramidale</i> (Tul.) has been shown to be neuroprotective in in vitro models of glutamate-induced excitotoxicity and inflammatory damage. However, the potential role of microglial regulation by agathisflavone in these neuroprotective effects i...

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Main Authors: Balbino Lino dos Santos, Cleonice Creusa dos Santos, Janaina R. P. Soares, Karina C. da Silva, Juciele Valeria R. de Oliveira, Gabriele S. Pereira, Fillipe M. de Araújo, Maria de Fátima D. Costa, Jorge Mauricio David, Victor Diogenes A. da Silva, Arthur Morgan Butt, Silvia Lima Costa
Format: Article
Language:English
Published: MDPI AG 2023-05-01
Series:Pharmaceutics
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Online Access:https://www.mdpi.com/1999-4923/15/5/1410
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author Balbino Lino dos Santos
Cleonice Creusa dos Santos
Janaina R. P. Soares
Karina C. da Silva
Juciele Valeria R. de Oliveira
Gabriele S. Pereira
Fillipe M. de Araújo
Maria de Fátima D. Costa
Jorge Mauricio David
Victor Diogenes A. da Silva
Arthur Morgan Butt
Silvia Lima Costa
author_facet Balbino Lino dos Santos
Cleonice Creusa dos Santos
Janaina R. P. Soares
Karina C. da Silva
Juciele Valeria R. de Oliveira
Gabriele S. Pereira
Fillipe M. de Araújo
Maria de Fátima D. Costa
Jorge Mauricio David
Victor Diogenes A. da Silva
Arthur Morgan Butt
Silvia Lima Costa
author_sort Balbino Lino dos Santos
collection DOAJ
description Agathisflavone, purified from <i>Cenostigma pyramidale</i> (Tul.) has been shown to be neuroprotective in in vitro models of glutamate-induced excitotoxicity and inflammatory damage. However, the potential role of microglial regulation by agathisflavone in these neuroprotective effects is unclear. Here we investigated the effects of agathisflavone in microglia submitted to inflammatory stimulus in view of elucidating mechanisms of neuroprotection. Microglia isolated from cortices of newborn Wistar rats were exposed to <i>Escherichia coli</i> lipopolysaccharide (LPS, 1 µg/mL) and treated or not with agathisflavone (1 µM). Neuronal PC12 cells were exposed to a conditioned medium from microglia (MCM) treated or not with agathisflavone. We observed that LPS induced microglia to assume an activated inflammatory state (increased CD68, more rounded/amoeboid phenotype). However, most microglia exposed to LPS and agathisflavone, presented an anti-inflammatory profile (increased CD206 and branched-phenotype), associated with the reduction in NO, GSH mRNA for NRLP3 inflammasome, IL1-β, IL-6, IL-18, TNF, CCL5, and CCL2. Molecular docking also showed that agathisflavone bound at the NLRP3 NACTH inhibitory domain. Moreover, in PC12 cell cultures exposed to the MCM previously treated with the flavonoid most cells preserved neurites and increased expression of β-tubulin III. Thus, these data reinforce the anti-inflammatory activity and the neuroprotective effect of agathisflavone, effects associated with the control of NLRP3 inflammasome, standing out it as a promising molecule for the treatment or prevention of neurodegenerative diseases.
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spelling doaj.art-46ce0413114040f591754b545aafa6792023-11-18T02:51:11ZengMDPI AGPharmaceutics1999-49232023-05-01155141010.3390/pharmaceutics15051410The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 InflammasomeBalbino Lino dos Santos0Cleonice Creusa dos Santos1Janaina R. P. Soares2Karina C. da Silva3Juciele Valeria R. de Oliveira4Gabriele S. Pereira5Fillipe M. de Araújo6Maria de Fátima D. Costa7Jorge Mauricio David8Victor Diogenes A. da Silva9Arthur Morgan Butt10Silvia Lima Costa11Laboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilGroup of Studies and Research for Health Development, University Salvador, Salvador 40140-110, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilDepartment of General and Inorganic Chemistry, Institute of Chemistry, University Federal da Bahia, Salvador 40170-110, Bahia, BrazilLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilSchool of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth PO1 2UP, UKLaboratory of Neurochemistry and Cellular Biology, Institute of Health Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon S/N, Salvador 40231-300, Bahia, BrazilAgathisflavone, purified from <i>Cenostigma pyramidale</i> (Tul.) has been shown to be neuroprotective in in vitro models of glutamate-induced excitotoxicity and inflammatory damage. However, the potential role of microglial regulation by agathisflavone in these neuroprotective effects is unclear. Here we investigated the effects of agathisflavone in microglia submitted to inflammatory stimulus in view of elucidating mechanisms of neuroprotection. Microglia isolated from cortices of newborn Wistar rats were exposed to <i>Escherichia coli</i> lipopolysaccharide (LPS, 1 µg/mL) and treated or not with agathisflavone (1 µM). Neuronal PC12 cells were exposed to a conditioned medium from microglia (MCM) treated or not with agathisflavone. We observed that LPS induced microglia to assume an activated inflammatory state (increased CD68, more rounded/amoeboid phenotype). However, most microglia exposed to LPS and agathisflavone, presented an anti-inflammatory profile (increased CD206 and branched-phenotype), associated with the reduction in NO, GSH mRNA for NRLP3 inflammasome, IL1-β, IL-6, IL-18, TNF, CCL5, and CCL2. Molecular docking also showed that agathisflavone bound at the NLRP3 NACTH inhibitory domain. Moreover, in PC12 cell cultures exposed to the MCM previously treated with the flavonoid most cells preserved neurites and increased expression of β-tubulin III. Thus, these data reinforce the anti-inflammatory activity and the neuroprotective effect of agathisflavone, effects associated with the control of NLRP3 inflammasome, standing out it as a promising molecule for the treatment or prevention of neurodegenerative diseases.https://www.mdpi.com/1999-4923/15/5/1410anti-neuroinflammatoryagathisflavoneneuroprotectionNRLP3 inflammasome
spellingShingle Balbino Lino dos Santos
Cleonice Creusa dos Santos
Janaina R. P. Soares
Karina C. da Silva
Juciele Valeria R. de Oliveira
Gabriele S. Pereira
Fillipe M. de Araújo
Maria de Fátima D. Costa
Jorge Mauricio David
Victor Diogenes A. da Silva
Arthur Morgan Butt
Silvia Lima Costa
The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
Pharmaceutics
anti-neuroinflammatory
agathisflavone
neuroprotection
NRLP3 inflammasome
title The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
title_full The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
title_fullStr The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
title_full_unstemmed The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
title_short The Flavonoid Agathisflavone Directs Brain Microglia/Macrophages to a Neuroprotective Anti-Inflammatory and Antioxidant State via Regulation of NLRP3 Inflammasome
title_sort flavonoid agathisflavone directs brain microglia macrophages to a neuroprotective anti inflammatory and antioxidant state via regulation of nlrp3 inflammasome
topic anti-neuroinflammatory
agathisflavone
neuroprotection
NRLP3 inflammasome
url https://www.mdpi.com/1999-4923/15/5/1410
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