miR-155-5p in Extracellular Vesicles Derived from Choroid Plexus Epithelial Cells Promotes Autophagy and Inflammation to Aggravate Ischemic Brain Injury in Mice

Ischemic stroke is a common disease of the central nervous system, and ischemic brain injury (IBI) is its main manifestation. Recently, extracellular vesicles (EVs) have been strongly related to the diagnosis and treatment of IBI. However, the underlying mechanism of their effects remains enigmatic....

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Veröffentlicht in:Oxidative medicine and cellular longevity 2022, Vol.2022, p.8603427-21
Hauptverfasser: Yang, Zhang, Shi, Xiaofang, Gao, Zidan, Chu, Lan
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Shi, Xiaofang
Gao, Zidan
Chu, Lan
description Ischemic stroke is a common disease of the central nervous system, and ischemic brain injury (IBI) is its main manifestation. Recently, extracellular vesicles (EVs) have been strongly related to the diagnosis and treatment of IBI. However, the underlying mechanism of their effects remains enigmatic. In the present study, we aimed to study how miR-155-5p plays a role in choroid plexus epithelial (CPE) cell-derived EVs in IBI pathology. We found that miR-155-5p expression was enriched in CPE cell-derived EVs, which were subsequently internalized by neurons, enabling the delivery of miR-155-5p into neurons. An inducible oxygen and glucose deprivation and reoxygenation (OGD/R) cell model was developed to mimic ischemic neuronal injury in vitro. miR-155-5p overexpression led to reduced neuron viability, promoted apoptosis, elevated autophagic proteins’ expression, and activated NLR family pyrin domain-containing 3- (NLRP3-) related inflammasomes, thereby aggravating OGD-induced neuronal injury. A dual-luciferase reporter assay exhibited that miR-155-5p could inhibit the Ras homolog enriched in brain (Rheb) expression, a mechanism critical for miR-155-5p-mediated neuronal injury. Furthermore, a mouse IBI model was developed using the transient middle cerebral artery occlusion (tMCAO) method. Animal experiments verified that miR-155p delivery via CPE cell-derived EVs aggravated IBI by suppressing Rheb expression. In conclusion, miR-155-5p in CPE-derived EVs can aggravate IBI pathology by suppressing Rheb expression and promoting NLRP3-mediated inflammasomes, suggesting its role as a potential therapeutic target in IBI.
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Recently, extracellular vesicles (EVs) have been strongly related to the diagnosis and treatment of IBI. However, the underlying mechanism of their effects remains enigmatic. In the present study, we aimed to study how miR-155-5p plays a role in choroid plexus epithelial (CPE) cell-derived EVs in IBI pathology. We found that miR-155-5p expression was enriched in CPE cell-derived EVs, which were subsequently internalized by neurons, enabling the delivery of miR-155-5p into neurons. An inducible oxygen and glucose deprivation and reoxygenation (OGD/R) cell model was developed to mimic ischemic neuronal injury in vitro. miR-155-5p overexpression led to reduced neuron viability, promoted apoptosis, elevated autophagic proteins’ expression, and activated NLR family pyrin domain-containing 3- (NLRP3-) related inflammasomes, thereby aggravating OGD-induced neuronal injury. A dual-luciferase reporter assay exhibited that miR-155-5p could inhibit the Ras homolog enriched in brain (Rheb) expression, a mechanism critical for miR-155-5p-mediated neuronal injury. Furthermore, a mouse IBI model was developed using the transient middle cerebral artery occlusion (tMCAO) method. Animal experiments verified that miR-155p delivery via CPE cell-derived EVs aggravated IBI by suppressing Rheb expression. In conclusion, miR-155-5p in CPE-derived EVs can aggravate IBI pathology by suppressing Rheb expression and promoting NLRP3-mediated inflammasomes, suggesting its role as a potential therapeutic target in IBI.</description><identifier>ISSN: 1942-0900</identifier><identifier>EISSN: 1942-0994</identifier><identifier>DOI: 10.1155/2022/8603427</identifier><identifier>PMID: 35222806</identifier><language>eng</language><publisher>United States: Hindawi</publisher><subject>Animal research ; Animals ; Antibodies ; Apoptosis ; Autophagy ; Brain damage ; Brain Ischemia - genetics ; Brain Ischemia - metabolism ; Brain Ischemia - pathology ; Cell culture ; Choroid Plexus - metabolism ; Cloning ; Enzymes ; Epithelial Cells - metabolism ; Extracellular vesicles ; Extracellular Vesicles - genetics ; Extracellular Vesicles - metabolism ; Gene expression ; Glucose ; Infarction, Middle Cerebral Artery - genetics ; Infarction, Middle Cerebral Artery - metabolism ; Infarction, Middle Cerebral Artery - pathology ; Inflammasomes - metabolism ; Inflammation ; Ischemia ; Kinases ; Mice ; MicroRNAs ; MicroRNAs - genetics ; MicroRNAs - metabolism ; Neurons ; Neurons - metabolism ; Neurons - pathology ; NLR Family, Pyrin Domain-Containing 3 Protein - metabolism ; Pathology ; Proteins ; Ras Homolog Enriched in Brain Protein - genetics ; Ras Homolog Enriched in Brain Protein - metabolism ; Signal Transduction ; Stroke ; Traumatic brain injury</subject><ispartof>Oxidative medicine and cellular longevity, 2022, Vol.2022, p.8603427-21</ispartof><rights>Copyright © 2022 Zhang Yang et al.</rights><rights>Copyright © 2022 Zhang Yang et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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Recently, extracellular vesicles (EVs) have been strongly related to the diagnosis and treatment of IBI. However, the underlying mechanism of their effects remains enigmatic. In the present study, we aimed to study how miR-155-5p plays a role in choroid plexus epithelial (CPE) cell-derived EVs in IBI pathology. We found that miR-155-5p expression was enriched in CPE cell-derived EVs, which were subsequently internalized by neurons, enabling the delivery of miR-155-5p into neurons. An inducible oxygen and glucose deprivation and reoxygenation (OGD/R) cell model was developed to mimic ischemic neuronal injury in vitro. miR-155-5p overexpression led to reduced neuron viability, promoted apoptosis, elevated autophagic proteins’ expression, and activated NLR family pyrin domain-containing 3- (NLRP3-) related inflammasomes, thereby aggravating OGD-induced neuronal injury. A dual-luciferase reporter assay exhibited that miR-155-5p could inhibit the Ras homolog enriched in brain (Rheb) expression, a mechanism critical for miR-155-5p-mediated neuronal injury. Furthermore, a mouse IBI model was developed using the transient middle cerebral artery occlusion (tMCAO) method. Animal experiments verified that miR-155p delivery via CPE cell-derived EVs aggravated IBI by suppressing Rheb expression. 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subjects Animal research
Animals
Antibodies
Apoptosis
Autophagy
Brain damage
Brain Ischemia - genetics
Brain Ischemia - metabolism
Brain Ischemia - pathology
Cell culture
Choroid Plexus - metabolism
Cloning
Enzymes
Epithelial Cells - metabolism
Extracellular vesicles
Extracellular Vesicles - genetics
Extracellular Vesicles - metabolism
Gene expression
Glucose
Infarction, Middle Cerebral Artery - genetics
Infarction, Middle Cerebral Artery - metabolism
Infarction, Middle Cerebral Artery - pathology
Inflammasomes - metabolism
Inflammation
Ischemia
Kinases
Mice
MicroRNAs
MicroRNAs - genetics
MicroRNAs - metabolism
Neurons
Neurons - metabolism
Neurons - pathology
NLR Family, Pyrin Domain-Containing 3 Protein - metabolism
Pathology
Proteins
Ras Homolog Enriched in Brain Protein - genetics
Ras Homolog Enriched in Brain Protein - metabolism
Signal Transduction
Stroke
Traumatic brain injury
title miR-155-5p in Extracellular Vesicles Derived from Choroid Plexus Epithelial Cells Promotes Autophagy and Inflammation to Aggravate Ischemic Brain Injury in Mice
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