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Yu H, Liu Q, Xie M, Fan J, Luo J, Huang J, Chen L. Nesfatin-1 inhibits cerebral aneurysms by activating Nrf2 and inhibiting NF-κB signaling. CNS Neurosci Ther 2024; 30:e14864. [PMID: 39097921 PMCID: PMC11298201 DOI: 10.1111/cns.14864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 06/16/2024] [Accepted: 07/07/2024] [Indexed: 08/06/2024] Open
Abstract
AIMS Cerebral aneurysm (CA) has been considered one of the most common cerebrovascular diseases, affecting millions of people worldwide. A therapeutic agent is currently missing for the treatment of CA. Nesfatin-1 (Nes-1) is an 82-amino acid adipokine which possesses a wide range of biological functions. However, the physiological function of Nes-1 in CA is still unknown. Here, we aimed to assess the preventive effects of Nes-1 in the pathological development of CA and elucidate the mechanisms behind this. METHODS We used an elastase-induced CA model, accompanied by a high-salt diet to induce hypertension. Additionally, diverse experimental techniques, including Verhoeff-Van Gieson staining, real time PCR, enzyme-linked immuno sorbent assay (ELISA), and immunofluorescence staining, were employed to assess CA formation, gene and protein expression, as well as the macrophage infiltration. RESULTS Our results indicate that administration of Nes-1 significantly decreased the aneurysm size. Additionally, Nes-1 prevented inflammatory response by inhibiting the expression of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and monocyte chemoattractant protein 1 (MCP-1) at both the mRNA and protein levels in the Circle of Willis (COW) region. Also, the increased levels of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) in the COW region were reduced by Nes-1. We found that Nes-1 administration suppressed the invasion of macrophages. Mechanistically, Nes-1 activated Nrf-2 by promoting its nuclear translocation but prevented the activation of the IκBα/NF-κB signaling pathway. CONCLUSION These findings suggest that Nes-1 might be used as a promising agent for the prevention of CA.
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Affiliation(s)
- Huimin Yu
- Department of Neurology, The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanChina
| | - Qingyuan Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, China National Clinical Research Center for Neurological DiseasesCapital Medical UniversityBeijingChina
| | - Minghong Xie
- Department of Neurosurgery, The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanChina
| | - Junquan Fan
- Department of Neurosurgery, The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanChina
| | - Jiajia Luo
- Department of Neurosurgery, The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanChina
| | - Junping Huang
- Department of NeurosurgeryMinzu Hospital of Guangxi Zhuang Autonomous RegionNanningChina
| | - Lei Chen
- Department of Neurosurgery, The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguanChina
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2
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Yu Y, Tong S, Liu T, Cai Y, Song Y, Zhou H, Jiang R. Exploring the causal role of immune cells in cerebral aneurysm through single-cell transcriptomics and Mendelian randomization analysis. Clin Exp Immunol 2024; 217:195-203. [PMID: 38661482 PMCID: PMC11239559 DOI: 10.1093/cei/uxae042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/11/2024] [Accepted: 04/23/2024] [Indexed: 04/26/2024] Open
Abstract
Cerebral aneurysm (CA) represents a significant clinical challenge, characterized by pathological dilation of cerebral arteries. Recent evidence underscores the crucial involvement of immune cells in CA pathogenesis. This study aims to explore the complex interplay between immune cells and CA formation. We analyzed single-cell RNA sequencing data from the GSE193533 dataset, focusing on unruptured CA and their controls. Comprehensive cell-type identification and pseudo-time trajectory analyses were conducted to delineate the dynamic shifts in immune cell populations. Additionally, a two-sample Mendelian randomization (MR) approach was employed to investigate the causal influence of various immunophenotypes on CA susceptibility and the reciprocal effect of CA formation on immune phenotypes. Single-cell transcriptomic analysis revealed a progressive loss of vascular smooth muscle cells (VSMCs) and an increase in monocytes/macrophages (Mo/MΦ) and other immune cells, signifying a shift from a structural to an inflammatory milieu in CA evolution. MR analysis identified some vital immunophenotypes, such as CD64 on CD14+ CD16+ monocytes (OR: 1.236, 95% CI: 1.064-1.435, P = 0.006), as potential risk factors for CA development, while others, like CD28- CD8br %CD8br (OR: 0.883, 95% CI: 0.789-0.988, P = 0.030), appeared protective. Reverse MR analysis demonstrated that CA formation could modulate specific immunophenotypic expressions, highlighting a complex bidirectional interaction between CA pathology and immune response. This study underscores the pivotal role of immune cells in this process through the integration of single-cell transcriptomics with MR analysis, offering a comprehensive perspective on CA pathogenesis, and potentially guiding future therapeutic strategies targeting specific immune pathways.
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Affiliation(s)
- Yunhu Yu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Key Laboratory of Post-Neuroinjury Neuro-Repair and Regeneration in the Central Nervous System, Ministry of Education, Tianjin Medical University, Tianjin Key Laboratory of Injury and Regenerative Medicine of Nervous System, Tianjin Neurological Institute, Tianjin, China
- Department of Neurosurgery, the People’s Hospital of HongHuaGang District of ZunYi, Zunyi, China
| | - Shiao Tong
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Key Laboratory of Post-Neuroinjury Neuro-Repair and Regeneration in the Central Nervous System, Ministry of Education, Tianjin Medical University, Tianjin Key Laboratory of Injury and Regenerative Medicine of Nervous System, Tianjin Neurological Institute, Tianjin, China
| | - Tao Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Key Laboratory of Post-Neuroinjury Neuro-Repair and Regeneration in the Central Nervous System, Ministry of Education, Tianjin Medical University, Tianjin Key Laboratory of Injury and Regenerative Medicine of Nervous System, Tianjin Neurological Institute, Tianjin, China
| | - Yunpeng Cai
- Department of Neurosurgery, the People’s Hospital of HongHuaGang District of ZunYi, Zunyi, China
| | - Yuanmei Song
- Department of Neurosurgery, the People’s Hospital of HongHuaGang District of ZunYi, Zunyi, China
| | - Hang Zhou
- Department of Neurosurgery, the People’s Hospital of HongHuaGang District of ZunYi, Zunyi, China
| | - Rongcai Jiang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Key Laboratory of Post-Neuroinjury Neuro-Repair and Regeneration in the Central Nervous System, Ministry of Education, Tianjin Medical University, Tianjin Key Laboratory of Injury and Regenerative Medicine of Nervous System, Tianjin Neurological Institute, Tianjin, China
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3
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Duan J, Zhao Q, He Z, Tang S, Duan J, Xing W. Current understanding of macrophages in intracranial aneurysm: relevant etiological manifestations, signaling modulation and therapeutic strategies. Front Immunol 2024; 14:1320098. [PMID: 38259443 PMCID: PMC10800944 DOI: 10.3389/fimmu.2023.1320098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Macrophages activation and inflammatory response play crucial roles in intracranial aneurysm (IA) formation and progression. The outcome of ruptured IA is considerably poor, and the mechanisms that trigger IA progression and rupture remain to be clarified, thereby developing effective therapy to prevent subarachnoid hemorrhage (SAH) become difficult. Recently, climbing evidences have been expanding our understanding of the macrophages relevant IA pathogenesis, such as immune cells population, inflammatory activation, intra-/inter-cellular signaling transductions and drug administration responses. Crosstalk between macrophages disorder, inflammation and cellular signaling transduction aggravates the devastating consequences of IA. Illustrating the pros and cons mechanisms of macrophages in IA progression are expected to achieve more efficient treatment interventions. In this review, we summarized the current advanced knowledge of macrophages activation, infiltration, polarization and inflammatory responses in IA occurrence and development, as well as the most relevant NF-κB, signal transducer and activator of transcription 1 (STAT1) and Toll-Like Receptor 4 (TLR4) regulatory signaling modulation. The understanding of macrophages regulatory mechanisms is important for IA patients' clinical outcomes. Gaining insight into the macrophages regulation potentially contributes to more precise IA interventions and will also greatly facilitate the development of novel medical therapy.
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Affiliation(s)
- Jian Duan
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Qijie Zhao
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zeyuan He
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Shuang Tang
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Jia Duan
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
| | - Wenli Xing
- Department of Cerebrovascular Disease, Suining Central Hospital, Suining, Sichuan, China
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4
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Martinez AN, Tortelote GG, Pascale CL, McCormack IG, Nordham KD, Suder NJ, Couldwell MW, Dumont AS. Single-Cell Transcriptome Analysis of the Circle of Willis in a Mouse Cerebral Aneurysm Model. Stroke 2022; 53:2647-2657. [PMID: 35770669 DOI: 10.1161/strokeaha.122.038776] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The circle of Willis (CoW) is the most common location for aneurysms to form in humans. Although the major cell types of the intracranial vasculature are well known, the heterogeneity and relative contributions of the different cells in healthy and aneurysmal vessels have not been well characterized. Here, we present the first comprehensive analysis of the lineage heterogeneity and altered transcriptomic profiles of vascular cells from healthy and aneurysmal mouse CoW using single-cell RNA sequencing. METHODS Cerebral aneurysms (CAs) were induced in adult male mice using an elastase model. Single-cell RNA sequencing was then performed on CoW samples obtained from animals that either had aneurysms form or rupture 14 days post-induction. Sham-operated animals served as controls. RESULTS Unbiased clustering analysis of the transcriptional profiles from >3900 CoW cells identified 19 clusters representing ten cell lineages: vascular smooth muscle cells, endothelial cells fibroblasts, pericytes and immune cells (macrophages, T and B lymphocytes, dendritic cells, mast cells, and neutrophils). The 5 vascular smooth muscle cell subpopulations had distinct transcriptional profiles and were classified as proliferative, stress-induced senescent, quiescent, inflammatory-like, or hyperproliferative. The transcriptional signature of the metabolic pathways of ATP generation was found to be downregulated in 2 major vascular smooth muscle cell clusters when CA was induced. Aneurysm induction led to significant expansion of the total macrophage population, and this expansion was further increased with rupture. Both inflammatory and resolution-phase macrophages were identified, and a massive spike of neutrophils was seen with CA rupture. Additionally, the neutrophil-to-lymphocyte ratio (NLR), which originated from CA induction mirrored what happens in humans. CONCLUSIONS Our data identify CA disease-relevant transcriptional signatures of vascular cells in the CoW and is searchable via a web-based R/shiny interface.
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Affiliation(s)
- Alejandra N Martinez
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Giovane G Tortelote
- Department of Pediatrics and The Tulane Hypertension & Renal Center of Excellence, Tulane University School of Medicine, New Orleans, LA. (G.G.T.)
| | - Crissey L Pascale
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Isabella G McCormack
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Kristen D Nordham
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Natalie J Suder
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Mitchell W Couldwell
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
| | - Aaron S Dumont
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA. (A.N.M., C.L.P., I.G.M., K.D.N., N.J.S., M.W.C., A.S.D.)
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5
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Li Y, Zhang Z, Liu D. Intracranial Aneurysms Induced by RUNX1 Through Regulation of NFKB1 in Patients With Hypertension-An Integrated Analysis Based on Multiple Datasets and Algorithms. Front Neurol 2022; 13:877801. [PMID: 35655614 PMCID: PMC9152011 DOI: 10.3389/fneur.2022.877801] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
Objective The purpose of this study was to identify potential therapeutic targets by examining the hub genes contributing to progression of intracranial aneurysm (IA) in patients with hypertension. Methods The bulk RNA sequencing (RNA-seq) datasets of hypertension and IA were obtained from the Gene Expression Omnibus (www.ncbi.nlm.nih.gov/geo) database. These data were then used to calculate disease-related differentially expressed genes (DEGs) at the individual level. An scRNA-seq dataset of patients with abdominal aortic aneurysms (AAA) was used to analyze monocyte/macrophage-related DEGs. On the basis of the DEG data related to monocytes and macrophages, a TF-genes network has been developed. Hub genes and core sub-networks have also been identified. Furthermore, the key genes have been validated in an external cohort. Results From combined monocyte and macrophage-derived DEGs from abdominal aortic aneurysms, five hub DEGs were detected, including IFI30, SERPINE1, HMOX1, IL24, and RUNX1. A total of 57 genes were found in the IA bulk RNA-seq dataset. A support vector machine-recursive feature elimination algorithm (SVM-RFE) was applied to further screen the seven genes (RPS4Y1, DDX3Y, RUNX1, CLEC10A, PLAC8, SLA, and LILRB3). RUNX1 was the hub gene that regulated NFKB1 in the monocyte/macrophage-related network. And RUNX1 is implicated in IA progression by regulating hematopoietic stem cell differentiation and abnormal platelet production, according to gene set enrichment analysis. Conclusion Among patients with hypertension, RUNX1 in monocytes and macrophages was associated with a higher risk of IA through its regulation of NFKB1.
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Affiliation(s)
- Yang Li
- Department of Neurosurgery, The First People's Hospital of Yinchuan, Yinchuan, China
| | - Zhen Zhang
- Department of Neurosurgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Donghua Liu
- Department of Neurosurgery, The Second People's Hospital of Yinchuan, Yinchuan, China
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6
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Lu T, Liu Z, Guo D, Ma C, Duan L, He Y, Jia R, Guo C, Xing Z, Liu Y, Li T, He Y. Transcriptome-Based Dissection of Intracranial Aneurysms Unveils an “Immuno-Thermal” Microenvironment and Defines a Pathological Feature-Derived Gene Signature for Risk Estimation. Front Immunol 2022; 13:878195. [PMID: 35711443 PMCID: PMC9194475 DOI: 10.3389/fimmu.2022.878195] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/19/2022] [Indexed: 12/16/2022] Open
Abstract
Immune inflammation plays an essential role in the formation and rupture of intracranial aneurysm (IA). However, the current limited knowledge of alterations in the immune microenvironment of IA has hampered the mastery of pathological mechanisms and technological advances, such as molecular diagnostic and coated stent-based molecular therapy. In this study, seven IA datasets were enrolled from the GEO database to decode the immune microenvironment and relevant biometric alterations. The ssGSEA algorithm was employed for immune infiltration assessment. IAs displayed abundant immune cell infiltration, activated immune-related pathways, and high expression of immune-related genes. Several immunosuppression cells and genes were also coordinately upregulated in IAs. Five immune-related hub genes, including CXCL10, IL6, IL10, STAT1, and VEGFA, were identified from the protein-protein interaction network and further detected at the protein level. CeRNA networks and latent drugs targeting the hub genes were predicted for targeted therapy reference. Two gene modules recognized via WCGNA were functionally associated with contractile smooth muscle loss and extracellular matrix metabolism, respectively. In blood datasets, a pathological feature-derived gene signature (PFDGS) for IA diagnosis and rupture risk prediction was established using machine learning. Patients with high PFDGS scores may possess adverse biological alterations and present with a high risk of morbidity or IA rupture, requiring more vigilance or prompt intervention. Overall, we systematically unveiled an “immuno-thermal” microenvironment characterized by co-enhanced immune activation and immunosuppression in IA, which provides a novel insight into molecular pathology. The PFDGS is a promising signature for optimizing risk surveillance and clinical decision-making in IA patients.
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Affiliation(s)
- Taoyuan Lu
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
| | - Zaoqu Liu
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Dehua Guo
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
| | - Chi Ma
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
| | - Lin Duan
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
- Department of Cerebrovascular Disease, Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Yanyan He
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
- Department of Cerebrovascular Disease, Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Rufeng Jia
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
| | - Chunguang Guo
- Department of Endovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhe Xing
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yiying Liu
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Tianxiao Li
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
- Department of Cerebrovascular Disease, Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- *Correspondence: Yingkun He, ; Tianxiao Li,
| | - Yingkun He
- Department of Cerebrovascular Disease, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Henan Provincial NeuroInterventional Engineering Research Center, Henan International Joint Laboratory of Cerebrovascular Disease, and Henan Engineering Research Center of Cerebrovascular Intervention Innovation, Zhengzhou, China
- Department of Cerebrovascular Disease, Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- *Correspondence: Yingkun He, ; Tianxiao Li,
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Güresir E, Gräff I, Seidel M, Bauer H, Coch C, Diepenseifen C, Dohmen C, Engels S, Hadjiathanasiou A, Heister U, Heyer I, Lampmann T, Paus S, Petzold G, Pöhlau D, Putensen C, Schneider M, Schuss P, Textor J, Velten M, Wach J, Welchowski T, Vatter H. Aneurysmal Subarachnoid Hemorrhage during the Shutdown for COVID-19. J Clin Med 2022; 11:jcm11092555. [PMID: 35566681 PMCID: PMC9104869 DOI: 10.3390/jcm11092555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/25/2022] [Accepted: 04/29/2022] [Indexed: 12/10/2022] Open
Abstract
The aim was to evaluate hospitalization rates for aneurysmal subarachnoid hemorrhage (SAH) within an interdisciplinary multicenter neurovascular network (NVN) during the shutdown for the COVID-19 pandemic along with its modifiable risk factors. In this multicenter study, admission rates for SAH were compared for the period of the shutdown for the COVID-19 pandemic in Germany (calendar weeks (cw) 12 to 16, 2020), the periods before (cw 6–11) and after the shutdown (cw 17–21 and 22–26, 2020), as well as with the corresponding cw in the years 2015–2019. Data on all-cause and pre-hospital mortality within the area of the NVN were retrieved from the Department of Health, and the responsible emergency medical services. Data on known triggers for systemic inflammation, e.g., respiratory viruses and air pollution, were analyzed. Hospitalizations for SAH decreased during the shutdown period to one-tenth within the multicenter NVN. There was a substantial decrease in acute respiratory illness rates, and of air pollution during the shutdown period. The implementation of public health measures, e.g., contact restrictions and increased personal hygiene during the shutdown, might positively influence modifiable risk factors, e.g., systemic inflammation, leading to a decrease in the incidence of SAH.
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Affiliation(s)
- Erdem Güresir
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
- Correspondence: ; Tel.: +49-228-287-16500
| | - Ingo Gräff
- Emergency Department, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (I.G.); (M.S.)
| | - Matthias Seidel
- Emergency Department, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (I.G.); (M.S.)
| | - Hartmut Bauer
- Department of Neurology, Marien-Hospital Euskirchen, Gottfried-Disse Strasse 40, 53879 Euskirchen, Germany;
| | - Christoph Coch
- Clinical Study Core Unit, Study Center Bonn (SZB), University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany;
| | - Christian Diepenseifen
- Emergency Medical Service Rhein-Sieg-Kreis, Kaiser-Wilhelm-Platz 1, 53721 Siegburg, Germany;
| | - Christian Dohmen
- Department of Neurology, LVR-Clinic Bonn, Kaiser-Karl-Ring 20, 53111 Bonn, Germany;
| | - Susanne Engels
- Department of Health City of Bonn, Berliner Platz 2, 53103 Bonn, Germany; (S.E.); (I.H.)
| | - Alexis Hadjiathanasiou
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
| | - Ulrich Heister
- Emergency Medical Service City of Bonn, Berliner Platz 2, 53103 Bonn, Germany;
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (C.P.); (M.V.)
| | - Inge Heyer
- Department of Health City of Bonn, Berliner Platz 2, 53103 Bonn, Germany; (S.E.); (I.H.)
| | - Tim Lampmann
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
| | - Sebastian Paus
- Department of Neurology, St. Johannes-Hospital Troisdorf, Wilhelm-Busch-Strasse 9, 53844 Troisdorf, Germany;
| | - Gabor Petzold
- Department of Neurology, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany;
| | - Dieter Pöhlau
- Department of Neurology, DRK-Kamillus-Clinic Asbach, Hospitalstraße 6, 53567 Asbach, Germany;
| | - Christian Putensen
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (C.P.); (M.V.)
| | - Matthias Schneider
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
| | - Patrick Schuss
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
| | - Jochen Textor
- Department of Radiology, Gemeinschaftskrankenhaus Bonn, Prinz-Albert-Straße 40, 53113 Bonn, Germany;
| | - Markus Velten
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (C.P.); (M.V.)
| | - Johannes Wach
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
| | - Thomas Welchowski
- Institute of Medical Biometry, Informatics and Epidemiology (IMBIE), University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany;
| | - Hartmut Vatter
- Department of Neurosurgery, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; (A.H.); (T.L.); (M.S.); (P.S.); (J.W.); (H.V.)
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Wen D, Chen R, Li H, Zheng J, Fu W, Shi Z, You C, Yang M, Ma L. Reduced M2 macrophages and adventitia collagen dampen the structural integrity of blood blister-like aneurysms and induce preoperative rerupture. Cell Prolif 2021; 55:e13175. [PMID: 34970805 PMCID: PMC8828257 DOI: 10.1111/cpr.13175] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/11/2021] [Accepted: 12/07/2021] [Indexed: 02/05/2023] Open
Abstract
Objective Blood blister–like aneurysms (BBAs) are extremely rare aneurysms. They are predisposed to preoperative rerupture with a high case‐fatality rate. Here, we attempt to interrogate the distinct clinicopathology and the histological basis underlying its clinical rerupture. Methods Three middle meningeal arteries, 11 BBA (5 reruptured, 6 non‐rerupture) and 19 saccular aneurysm samples were obtained for histopathological investigation. Three reruptured BBAs, 3 non‐reruptured BBAs and 6 saccular (3 ruptured, 3 unruptured) aneurysms were obtained for quantitative flow cytometry analysis. Results Compared with true saccular aneurysms, the BBA aneurysm wall lacks arterial stroma cells including CD31+ endothelial cells and α‐SMA + smooth muscle cells. Only fibroblasts and adventitial collagen were observed in the BBA aneurysm wall. Meanwhile, BBAs were enriched with infiltrated inflammatory cells, especially polarized macrophages. Based on the rerupture status, those reruptured BBAs showed drastically reduced fibroblasts and adventitia collagen. Moreover, M2‐polarized macrophages were observed dominant in BBAs and exhibit repairing cellular functions based on their interplays with arterial fibroblasts. Reduced M2 macrophages and arterial tissue repairing modulation may be responsible for the decreasing collagen synthesis and fibrosis repairment, which potentially dampens the aneurysm integrity and induces BBA aneurysm reruputre. Conclusions BBAs poses histopathological features of occult pseudoaneurysms or dissecting aneurysms. Reduced M2 macrophages and adventitia collagen may dampen the structural integrity of BBAs and induce preoperative rerupture.
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Affiliation(s)
- Dingke Wen
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ruiqi Chen
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Hao Li
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jun Zheng
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Wei Fu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ziyan Shi
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chao You
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Mu Yang
- Translational Centre for Oncoimmunology, Sichuan Cancer Hospital & Institute, University of Electronic and Science Technology of China, Chengdu, China
| | - Lu Ma
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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9
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RNA Sequencing Data from Human Intracranial Aneurysm Tissue Reveals a Complex Inflammatory Environment Associated with Rupture. Mol Diagn Ther 2021; 25:775-790. [PMID: 34403136 DOI: 10.1007/s40291-021-00552-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Intracranial aneurysm (IA) rupture leads to deadly subarachnoid hemorrhages. However, the mechanisms leading to rupture remain poorly understood. Altered gene expression within IA tissue is linked to the pathobiology of aneurysm development and progression. Here, we analyzed expression patterns of control tissue samples and compared them to those of unruptured and ruptured IA tissue samples using data from the Gene Expression Omnibus (GEO). METHODS FASTQ files for 21 ruptured IAs, 21 unruptured IAs, and 16 control tissue samples were accessed from the GEO database. DESeq2 was used for differential expression analysis in three comparisons: unruptured IA versus control, ruptured IA versus control, and ruptured versus unruptured IA. Genes that were differentially expressed in multiple comparisons were evaluated to find those progressively increasing/decreasing from control to unruptured to ruptured. Significance was tested by either analysis of variance/Gabriel or Brown-Forsythe/Games Howell (p < 0.05 was considered significant). We used additional RNA sequencing and proteomics datasets to evaluate if our differentially expressed genes (DEGs) were present in other studies. Bioinformatics analyses were performed with g:Profiler and Ingenuity Pathway Analysis. RESULTS In total, we identified 1768 DEGs, of which 318 were found in multiple comparisons. Unruptured versus control reflected vascular remodeling processes, while ruptured versus control reflected inflammatory responses and cell activation/signaling. When comparing ruptured to unruptured IAs, we found massive activation of inflammation, inflammatory responses, and leukocyte responses. Of the 318 genes in multiple comparisons, 127 were found to be significant in the multi-cohort correlation analysis. Those that progressively increased (70 genes) were associated with immune system processes, while those that progressively decreased (38 genes) did not return any gene ontology terms. Many of our DEGs were also found in the other IA tissue sequencing studies. CONCLUSIONS We found unruptured IAs relate more to remodeling processes, while ruptured IAs reflect more inflammatory and immune responses.
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10
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Akbar N, Paget D, Choudhury RP. Extracellular Vesicles in Innate Immune Cell Programming. Biomedicines 2021; 9:biomedicines9070713. [PMID: 34201592 PMCID: PMC8301301 DOI: 10.3390/biomedicines9070713] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/10/2021] [Accepted: 06/14/2021] [Indexed: 02/08/2023] Open
Abstract
Extracellular vesicles (EV) are a heterogeneous group of bilipid-enclosed envelopes that carry proteins, metabolites, RNA, DNA and lipids from their parent cell of origin. They mediate cellular communication to other cells in local tissue microenvironments and across organ systems. EV size, number and their biologically active cargo are often altered in response to pathological processes, including infection, cancer, cardiovascular diseases and in response to metabolic perturbations such as obesity and diabetes, which also have a strong inflammatory component. Here, we discuss the broad repertoire of EV produced by neutrophils, monocytes, macrophages, their precursor hematopoietic stem cells and discuss their effects on the innate immune system. We seek to understand the immunomodulatory properties of EV in cellular programming, which impacts innate immune cell differentiation and function. We further explore the possibilities of using EV as immune targeting vectors, for the modulation of the innate immune response, e.g., for tissue preservation during sterile injury such as myocardial infarction or to promote tissue resolution of inflammation and potentially tissue regeneration and repair.
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Affiliation(s)
- Naveed Akbar
- Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK; (D.P.); (R.P.C.)
- Correspondence:
| | - Daan Paget
- Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK; (D.P.); (R.P.C.)
- Department of Pharmacology, University of Oxford, Oxford OX1 3QT, UK
| | - Robin P. Choudhury
- Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK; (D.P.); (R.P.C.)
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11
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Tutino VM, Zebraski HR, Rajabzadeh-Oghaz H, Waqas M, Jarvis JN, Bach K, Mokin M, Snyder KV, Siddiqui AH, Poppenberg KE. Identification of Circulating Gene Expression Signatures of Intracranial Aneurysm in Peripheral Blood Mononuclear Cells. Diagnostics (Basel) 2021; 11:1092. [PMID: 34203780 PMCID: PMC8232768 DOI: 10.3390/diagnostics11061092] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/04/2021] [Accepted: 06/09/2021] [Indexed: 12/18/2022] Open
Abstract
Peripheral blood mononuclear cells (PBMCs) play an important role in the inflammation that accompanies intracranial aneurysm (IA) pathophysiology. We hypothesized that PBMCs have different transcriptional profiles in patients harboring IAs as compared to IA-free controls, which could be the basis for potential blood-based biomarkers for the disease. To test this, we isolated PBMC RNA from whole blood of 52 subjects (24 with IA, 28 without) and performed next-generation RNA sequencing to obtain their transcriptomes. In a randomly assigned discovery cohort of n = 39 patients, we performed differential expression analysis to define an IA-associated signature of 54 genes (q < 0.05 and an absolute fold-change ≥ 1.3). In the withheld validation dataset, these genes could delineate patients with IAs from controls, as the majority of them still had the same direction of expression difference. Bioinformatics analyses by gene ontology enrichment analysis and Ingenuity Pathway Analysis (IPA) demonstrated enrichment of structural regulation processes, intracellular signaling function, regulation of ion transport, and cell adhesion. IPA analysis showed that these processes were likely coordinated through NF-kB, cytokine signaling, growth factors, and TNF activity. Correlation analysis with aneurysm size and risk assessment metrics showed that 4/54 genes were associated with rupture risk. These findings highlight the potential to develop predictive biomarkers from PBMCs to identify patients harboring IAs.
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Affiliation(s)
- Vincent M. Tutino
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Pathology and Anatomical Sciences, University at Buffalo, Buffalo, NY 14203, USA
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14228, USA
| | - Haley R. Zebraski
- Department of Biomedical Engineering, University at Buffalo, Buffalo, NY 14228, USA;
| | - Hamidreza Rajabzadeh-Oghaz
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
| | - Muhammad Waqas
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
| | - James N. Jarvis
- Department of Pediatrics, University at Buffalo, Buffalo, NY 14203, USA;
| | - Konrad Bach
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33620, USA; (K.B.); (M.M.)
| | - Maxim Mokin
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33620, USA; (K.B.); (M.M.)
| | - Kenneth V. Snyder
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
| | - Adnan H. Siddiqui
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
| | - Kerry E. Poppenberg
- Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, NY 14203, USA; (H.R.-O.); (M.W.); (K.V.S.); (A.H.S.); (K.E.P.)
- Department of Neurosurgery, University at Buffalo, Buffalo, NY 14203, USA
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12
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Bae H, Suh SI, Yoon WK, Roh H, Kim C, Kwon TH. Correlation of Aneurysmal Wall Enhancement of Unruptured Intracranial Aneurysms on High-Resolution Vessel-Wall Imaging With Clinical Indices and Surgical Findings. Neurosurgery 2021; 89:420-427. [PMID: 34114036 DOI: 10.1093/neuros/nyab178] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 03/19/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Many physicians consider aneurysmal wall enhancement (AWE) on high resolution-vessel wall imaging (HR-VWI) as an imaging biomarker of unstable unruptured intracranial aneurysms (UIAs). OBJECTIVE To evaluate the clinical value of different AWE signal intensities (SIs) by assessing the correlation between the AWE SIs and surgical findings and rupture risk assessment tools. METHODS Twenty-six patients with 34 aneurysms who underwent surgical clipping were included. The corrected AWE SI was calculated by comparing T1-weighted images with post-gadolinium enhanced T1-weighted images. The correlation of AWE with the population, hypertension, age, size of aneurysm, earlier subarachnoid hemorrhage from another aneurysm, site of aneurysm (PHASES) and earlier subarachnoid hemorrhage, location of the aneurysm, age >60 years, population, size of the aneurysm, shape of the aneurysm (ELAPSS) scores was evaluated using correlation and linear regression analysis. To quantify the surgical findings, the average color value of the aneurysms expressed in the CIELCh system was measured. Δh, color difference from yellow, was used for statistical analysis. RESULTS The mean age of the patients and aneurysm size were 64.08 yr and 6.95 mm, respectively. The mean AWE SI, PHASES and ELAPSS scores, and Δh were 22.30, 8.41, 20.32, and 41.36, respectively. The coefficients of correlation of AWE SI with the PHASES and ELAPSS scores and Δh were 0.526, 0.563, and -0.431. We found that the AWE SI affected the PHASES (β = 0.430) and ELAPSS scores (β = 0.514) and Δh (β = -0.427) in simple linear regression analysis. CONCLUSION The AWE on HR-VWI was correlated with the PHASES and ELAPSS scores and the color. The stronger the AWE, the higher were the PHASES and ELAPSS scores and the more abnormal was the color. The AWE might indicate the degree of inflammation.
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Affiliation(s)
- Heejin Bae
- Department of Neurosurgery, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Sang-Il Suh
- Department of Radiology, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Won Ki Yoon
- Department of Neurosurgery, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Haewon Roh
- Department of Neurosurgery, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Chungyeul Kim
- Department of Pathology, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Taek-Hyun Kwon
- Department of Neurosurgery, Guro Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
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13
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Shan D, Guo X, Yang G, He Z, Zhao R, Xue H, Li G. Integrated Transcriptional Profiling Analysis and Immune-Related Risk Model Construction for Intracranial Aneurysm Rupture. Front Neurosci 2021; 15:613329. [PMID: 33867914 PMCID: PMC8046927 DOI: 10.3389/fnins.2021.613329] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 03/04/2021] [Indexed: 12/15/2022] Open
Abstract
Intracranial aneurysms (IAs) may cause lethal subarachnoid hemorrhage upon rupture, but the molecular mechanisms are poorly understood. The aims of this study were to analyze the transcriptional profiles to explore the functions and regulatory networks of differentially expressed genes (DEGs) in IA rupture by bioinformatics methods and to identify the underlying mechanisms. In this study, 1,471 DEGs were obtained, of which 619 were upregulated and 852 were downregulated. Gene enrichment analysis showed that the DEGs were mainly enriched in the inflammatory response, immune response, neutrophil chemotaxis, and macrophage differentiation. Related pathways include the regulation of actin cytoskeleton, leukocyte transendothelial migration, nuclear factor κB signaling pathway, Toll-like receptor signaling pathway, tumor necrosis factor signaling pathway, and chemokine signaling pathway. The enrichment analysis of 20 hub genes, subnetworks, and significant enrichment modules of weighted gene coexpression network analysis showed that the inflammatory response and immune response had a causal relationship with the rupture of unruptured IAs (UIAs). Next, the CIBERSORT method was used to analyze immune cell infiltration into ruptured IAs (RIAs) and UIAs. Macrophage infiltration into RIAs increased significantly compared with that into UIAs. The result of principal component analysis revealed that there was a difference between RIAs and UIAs in immune cell infiltration. A 4-gene immune-related risk model for IA rupture (IRMIR), containing CXCR4, CXCL3, CX3CL1, and CXCL16, was established using the glmnet package in R software. The receiver operating characteristic value revealed that the model represented an excellent clinical situation for potential application. Enzyme-linked immunosorbent assay was performed and showed that the concentrations of CXCR4 and CXCL3 in serum from RIA patients were significantly higher than those in serum from UIA patients. Finally, a competing endogenous RNA network was constructed to provide a potential explanation for the mechanism of immune cell infiltration into IAs. Our findings highlighted the importance of immune cell infiltration into RIAs, providing a direction for further research.
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Affiliation(s)
- Dezhi Shan
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China
| | - Xing Guo
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China.,Shandong Key Laboratory of Brain Function Remodeling, Jinan, China
| | - Guozheng Yang
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China
| | - Zheng He
- Department of Neurosurgery, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Rongrong Zhao
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China.,Shandong Key Laboratory of Brain Function Remodeling, Jinan, China
| | - Hao Xue
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China.,Shandong Key Laboratory of Brain Function Remodeling, Jinan, China
| | - Gang Li
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, China.,Shandong Key Laboratory of Brain Function Remodeling, Jinan, China
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14
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Ikeda H, Ishii A, Sano K, Chihara H, Arai D, Abekura Y, Nishi H, Ono M, Saji H, Miyamoto S. Activatable Fluorescence Imaging of Macrophages in Cerebral Aneurysms Using Iron Oxide Nanoparticles Conjugated With Indocyanine Green. Front Neurosci 2020; 14:370. [PMID: 32390794 PMCID: PMC7189773 DOI: 10.3389/fnins.2020.00370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/26/2020] [Indexed: 12/11/2022] Open
Abstract
Background and Purpose Chronic inflammation is involved in the formation and enlargement of cerebral aneurysms (CAs), with macrophages playing a key role in the process. The present study evaluated visualization of macrophages present in CAs using an activatable fluorescent probe (IONP-ICG) comprising an iron oxide nanoparticles (IONPs) conjugated with indocyanine green (ICG). Methods IONP-ICG was intravenously administered to 15-week-old CA model rats (n = 8), and ex vivo near-infrared fluorescence (NIRF) imaging and histological assessment of exposed CAs and cerebral arteries were performed 48 h later. Similar evaluations were performed in the control group, which included CA model rats given IONPs or ICG (n = 8 each). Results ICG-derived NIRF signals were detected in three IONP-ICG group rats but not in IONP or ICG control groups. Among the three rats that exhibited signals, NIRF signal accumulation was observed in the CA of two rats and at the site of hemodynamic stress in the left posterior cerebral artery in one rat. Histologically, NIRF signals correlated strongly with macrophage localization. A total of 13 CAs formed in the IONP-ICG group. The number of macrophages in the CA wall was significantly greater in the two CAs that exhibited NIRF signals compared to the remaining 11 CAs that did not (P = 0.037). Moreover, all 11 CAs that did not exhibit NIRF signals were iron-negative, while the two CAs that exhibited NIRF signals were both iron-positive (P = 0.013). Conclusion NIRF imaging using an activatable IONP-ICG probe is feasible for detecting the macrophage-rich regions in CAs and the cerebral artery wall, which is considered an early lesion in the process of CA formation.
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Affiliation(s)
- Hiroyuki Ikeda
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Akira Ishii
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kohei Sano
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan.,Laboratory of Biophysical Chemistry, Kobe Pharmaceutical University, Kobe, Japan
| | - Hideo Chihara
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Daisuke Arai
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yu Abekura
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hidehisa Nishi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masahiro Ono
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Hideo Saji
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
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15
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RBM4 regulates M1 macrophages polarization through targeting STAT1-mediated glycolysis. Int Immunopharmacol 2020; 83:106432. [PMID: 32248017 DOI: 10.1016/j.intimp.2020.106432] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/11/2020] [Accepted: 03/19/2020] [Indexed: 12/20/2022]
Abstract
M1/M2 macrophages polarization play important roles in regulating tissue homeostasis. Recently, RNA-binding motif 4 (RBM4) has been reported to modulate the proliferation and expression of inflammatory factors in HeLa cells. However, whether RBM4 is involved in regulating macrophage polarization and inflammatory factor expression are still unknown. In this study, RAW264.7, a mouse macrophage cell line, were stimulated with interferon γ (IFN-γ) or interleukin-4 (IL-4) to induce M1/M2 macrophages polarization. We found that IFN-γ, but not IL-4, stimulation decreased RBM4 expression in macrophages, and RBM4 overexpression inhibits IFN-γ-induced M1 macrophage polarization. Furthermore, RNA-Sequencing, protein immunoprecipitation accompanied with mass spectrometry, and extracellular acidification rate analysis showed that RBM4 suppresses IFN-γ-induced M1 macrophage polarization though inhibiting glycolysis. Moreover, RBM4 knockdown promoted IFN-γ-induced signal transducer and activator of transcription 1 (STAT1) activation via increasing STAT1 mRNA stability, leading to the increase of glycolysis-related gene transcripts regulated by STAT1. Finally, we find that RBM4 interacts with YTH N6-methyladenosine RNA binding protein 2 (YTHDF2) to degrade m6A modified STAT1 mRNA, thereby regulating glycolysis and M1 macrophage polarization. Collectively, the current study firstly reports that RBM4 regulates M1 macrophages polarization through targeting STAT1-mediated glycolysis and shows that RBM4 is a possible candidate for regulating macrophage M1 polarization and inflammatory responses.
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16
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Characteristics of circulating monocytes at baseline and after activation in patients with intracranial aneurysm. Hum Immunol 2019; 81:41-47. [PMID: 31735443 DOI: 10.1016/j.humimm.2019.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 10/11/2019] [Accepted: 11/06/2019] [Indexed: 11/24/2022]
Abstract
Intracranial aneurysm (IA) is a bulging of blood vessels around the brain that is often asymptomatic but may cause severe complications and death if ruptured. Macrophage-mediated immune responses can contribute to the development of IA. During homeostasis and inflammation, circulating monocytes can infiltrate the vasculature, where they develop into macrophages, and modulate immune responses. Based on the expression of CD14 and CD16, total circulating monocytes can be distinguished into three main subsets, including the CD14+CD16- classical monocytes, the CD14+CD16+ intermediate monocytes, and the CD14loCD16++ non-classical monocytes. In this study, we found that frequencies of CD14+CD16- classical monocytes were significantly lower in IA patients than in healthy controls, while the frequencies of CD14+CD16+ intermediate monocytes and CD14loCD16++ non-classical monocytes were significantly higher in IA patients than in healthy controls. The frequencies of CD14+CD16+ intermediate monocytes were further elevated in IA-ruptured patients compared to those in IA-unruptured patients. Compared to classical monocytes, intermediate monocytes and non-classical monocytes presented higher TNF-α and IL-1β expression. When cocultured with autologous naive CD4 T cells, intermediate and non-classical monocytes preferentially promoted the expression of TBX21 and RORC over the expression of FOXP3 in CD4 T cells. Inhibition of TNF-α and IL-1β slightly reduced TBX21 expression and markedly reduced RORC expression, and at the same time significantly increased FOXP3 expression in CD4 T cells. Overall, this study demonstrated that the monocytes were dysregulated in IA patients in a manner that favored the development of proinflammatory responses.
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17
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Intracranial Aneurysms: Pathology, Genetics, and Molecular Mechanisms. Neuromolecular Med 2019; 21:325-343. [PMID: 31055715 DOI: 10.1007/s12017-019-08537-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/08/2019] [Indexed: 12/14/2022]
Abstract
Intracranial aneurysms (IA) are local dilatations in cerebral arteries that predominantly affect the circle of Willis. Occurring in approximately 2-5% of adults, these weakened areas are susceptible to rupture, leading to subarachnoid hemorrhage (SAH), a type of hemorrhagic stroke. Due to its early age of onset and poor prognosis, SAH accounts for > 25% of years lost for all stroke victims under the age of 65. In this review, we describe the cerebrovascular pathology associated with intracranial aneurysms. To understand IA genetics, we summarize syndromes with elevated incidence, genome-wide association studies (GWAS), whole exome studies on IA-affected families, and recent research that established definitive roles for Thsd1 (Thrombospondin Type 1 Domain Containing Protein 1) and Sox17 (SRY-box 17) in IA using genetically engineered mouse models. Lastly, we discuss the underlying molecular mechanisms of IA, including defects in vascular endothelial and smooth muscle cells caused by dysfunction in mechanotransduction, Thsd1/FAK (Focal Adhesion Kinase) signaling, and the Transforming Growth Factor β (TGF-β) pathway. As illustrated by THSD1 research, cell adhesion may play a significant role in IA.
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18
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Hourani S, Motwani K, Wajima D, Fazal H, Jones CH, Doré S, Hosaka K, Hoh BL. Local Delivery Is Critical for Monocyte Chemotactic Protein-1 Mediated Site-Specific Murine Aneurysm Healing. Front Neurol 2018; 9:158. [PMID: 29615957 PMCID: PMC5868072 DOI: 10.3389/fneur.2018.00158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 03/02/2018] [Indexed: 11/13/2022] Open
Abstract
Background Local delivery of monocyte chemotactic protein-1 (MCP-1/CCL2) via our drug-eluting coil has been shown to promote intrasaccular aneurysm healing via an inflammatory pathway. Objective In this study, we validate the importance of local MCP-1 in murine aneurysm healing. Whether systemic, rather than local, delivery of MCP-1 can direct site-specific aneurysm healing has significant translational implications. If systemic MCP-1 is effective, then MCP-1 could be administered as a pill rather than by endovascular procedure. Furthermore, we confirm that MCP-1 is the primary effector in our MCP-1 eluting coil-mediated murine aneurysm healing model. Methods We compare aneurysm healing with repeated intraperitoneal MCP-1 versus vehicle injection, in animals with control poly(lactic-co-glycolic) acid (PLGA)-coated coils. We demonstrate elimination of the MCP-1-associated tissue-healing response by knockout of MCP-1 or CCR2 (MCP-1 receptor) and by selectively inhibiting MCP-1 or CCR2. Using immunofluorescent probing, we explore the cell populations found in healed aneurysm tissue following each intervention. Results Systemically administered MCP-1 with PLGA coil control does not produce comparable aneurysm healing, as seen with MCP-1 eluting coils. MCP-1-directed aneurysm healing is eliminated by selective inhibition of MCP-1 or CCR2 and in MCP-1-deficient or CCR2-deficient mice. No difference was detected in M2 macrophage and myofibroblast/smooth muscle cell staining with systemic MCP-1 versus vehicle in aneurysm wall, but a significant increase in these cell types was observed with MCP-1 eluting coil implant and attenuated by MCP-1/CCR2 blockade or deficiency. Conclusion We show that systemic MCP-1 concurrent with PLGA-coated platinum coil implant is not sufficient to produce site-specific aneurysm healing. MCP-1 is a critical, not merely complementary, actor in the aneurysm healing pathway.
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Affiliation(s)
- Siham Hourani
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Kartik Motwani
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Daisuke Wajima
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Hanain Fazal
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Chad H Jones
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Sylvain Doré
- Department of Anesthesiology, University of Florida, Gainesville, FL, United States
| | - Koji Hosaka
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
| | - Brian L Hoh
- Department of Neurosurgery, University of Florida, Gainesville, FL, United States
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