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Masarapu Y, Cekanaviciute E, Andrusivova Z, Westholm JO, Björklund Å, Fallegger R, Badia-I-Mompel P, Boyko V, Vasisht S, Saravia-Butler A, Gebre S, Lázár E, Graziano M, Frapard S, Hinshaw RG, Bergmann O, Taylor DM, Wallace DC, Sylvén C, Meletis K, Saez-Rodriguez J, Galazka JM, Costes SV, Giacomello S. Spatially resolved multiomics on the neuronal effects induced by spaceflight in mice. Nat Commun 2024; 15:4778. [PMID: 38862479 PMCID: PMC11166911 DOI: 10.1038/s41467-024-48916-8] [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: 05/23/2023] [Accepted: 05/17/2024] [Indexed: 06/13/2024] Open
Abstract
Impairment of the central nervous system (CNS) poses a significant health risk for astronauts during long-duration space missions. In this study, we employed an innovative approach by integrating single-cell multiomics (transcriptomics and chromatin accessibility) with spatial transcriptomics to elucidate the impact of spaceflight on the mouse brain in female mice. Our comparative analysis between ground control and spaceflight-exposed animals revealed significant alterations in essential brain processes including neurogenesis, synaptogenesis and synaptic transmission, particularly affecting the cortex, hippocampus, striatum and neuroendocrine structures. Additionally, we observed astrocyte activation and signs of immune dysfunction. At the pathway level, some spaceflight-induced changes in the brain exhibit similarities with neurodegenerative disorders, marked by oxidative stress and protein misfolding. Our integrated spatial multiomics approach serves as a stepping stone towards understanding spaceflight-induced CNS impairments at the level of individual brain regions and cell types, and provides a basis for comparison in future spaceflight studies. For broader scientific impact, all datasets from this study are available through an interactive data portal, as well as the National Aeronautics and Space Administration (NASA) Open Science Data Repository (OSDR).
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Affiliation(s)
- Yuvarani Masarapu
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Egle Cekanaviciute
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
| | - Zaneta Andrusivova
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Jakub O Westholm
- National Bioinformatics Infrastructure Sweden, Department of Biochemistry and Biophysics, Stockholm University, Science for Life Laboratory, Stockholm, Sweden
| | - Åsa Björklund
- Department of Cell and Molecular Biology, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Robin Fallegger
- Heidelberg University, Faculty of Medicine, and Heidelberg University Hospital, Institute for Computational Biomedicine, Bioquant, Heidelberg, Germany
| | - Pau Badia-I-Mompel
- Heidelberg University, Faculty of Medicine, and Heidelberg University Hospital, Institute for Computational Biomedicine, Bioquant, Heidelberg, Germany
- GSK, Cellzome, Heidelberg, Germany
| | - Valery Boyko
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
- Bionetics, Yorktown, VA, USA
| | - Shubha Vasisht
- Department of Biomedical and Health Informatics, The Children's Hospital of Philadelphia Research Institute, Philadelphia, PA, USA
| | - Amanda Saravia-Butler
- KBR, Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
| | - Samrawit Gebre
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
| | - Enikő Lázár
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Marta Graziano
- Department of Neuroscience, Karolinska Institutet, Biomedicum, Solna, Sweden
| | - Solène Frapard
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Robert G Hinshaw
- NASA Postdoctoral Program - Oak Ridge Associated Universities, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
| | - Olaf Bergmann
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
- Pharmacology and Toxicology, Department of Pharmacology and Toxicology University Medical Center Goettingen, Goettingen, Germany
| | - Deanne M Taylor
- Department of Biomedical and Health Informatics, The Children's Hospital of Philadelphia Research Institute, Philadelphia, PA, USA
- Department of Pediatrics, The University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA
| | - Douglas C Wallace
- Center for Mitochondrial and Epigenomic Medicine, Children's Hospital of Philadelphia and Department of Pediatrics, Division of Human Genetics, The University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104, USA
| | - Christer Sylvén
- Department of Medicine, Karolinska Institute, Huddinge, Sweden
| | | | - Julio Saez-Rodriguez
- Heidelberg University, Faculty of Medicine, and Heidelberg University Hospital, Institute for Computational Biomedicine, Bioquant, Heidelberg, Germany
| | - Jonathan M Galazka
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA
| | - Sylvain V Costes
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, Mountain View, CA, 94035, USA.
| | - Stefania Giacomello
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden.
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Luo W, Bu W, Chen H, Liu W, Lu X, Zhang G, Liu C, Li X, Ren H. Electroacupuncture reduces oxidative stress response and improves secondary injury of intracerebral hemorrhage in rats by activating the peroxisome proliferator-activated receptor-γ/nuclear factor erythroid2-related factor 2/γ-glutamylcysteine synthetase pathway. Neuroreport 2024; 35:499-508. [PMID: 38597270 PMCID: PMC11045547 DOI: 10.1097/wnr.0000000000002026] [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: 01/30/2024] [Accepted: 02/19/2024] [Indexed: 04/11/2024]
Abstract
Intracerebral hemorrhage (ICH) is a severe stroke subtype. Secondary injury is a key factor leading to neurological deficits after ICH. Electroacupuncture (EA) can improve the neurological function after ICH, however, its internal mechanism is still unclear. The aim of this study is to investigate whether EA could ameliorate secondary injury after ICH through antioxidative stress and its potential regulatory mechanism. A rat model of ICH was established by injecting autologous blood into striatum. After the intervention of EA and EA combined with peroxisome proliferator-activated receptor-γ (PPARγ) blocker, Zea-longa scores, modified neurological severity scores and open field tests were used to evaluate the neurological function of the rats. Flow cytometry detected tissue reactive oxygen species (ROS) levels. Tissue tumor necrosis factor-α (TNF-α) levels were analyzed by enzyme-linked immunosorbent assays. The protein expressions of PPAR γ, nuclear factor erythroid2-related factor 2 (Nrf2) and γ-glutamylcysteine synthetase (γ-GCS) were detected by Western blot. Immunohistochemistry was used to observe the activation of microglia. The demyelination degree of axon myelin was observed by transmission electron microscope. Compared with the model group, EA intervention improved neurological function, decreased ROS and TNF-α levels, increased the protein expression of PPARγ, Nrf2 and γ-GCS, and reduced the activation of microglia, it also alleviated axonal myelin sheath damage. In addition, the neuroprotective effect of EA was partially attenuated by PPARγ blocker. EA ameliorated the neurological function of secondary injury after ICH in rats, possibly by activating the PPARγ/Nrf2/γ-GCS signaling pathway, reducing microglia activation, and inhibiting oxidative stress, thus alleviating the extent of axonal demyelination plays a role.
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Affiliation(s)
| | - Wei Bu
- Department of Neurosurgery, The Third Hospital of Hebei Medical University
| | - Hequn Chen
- Department of Neurosurgery, The Third Hospital of Hebei Medical University
| | | | - Xudong Lu
- Basic Medical College, Hebei Medical University, Shijiazhuang, China
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Chiu CD, Chiu YP, Yip HT, Ji HR, Cho DY, Cheng IHJ, Chen CY. Thiazolidinediones Decrease the Recurrence of Intracerebral Hemorrhage in Type 2 Diabetes Mellitus Patients: A Nested Case-Control Study. Neuroepidemiology 2024:1-14. [PMID: 38705143 DOI: 10.1159/000539001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 04/02/2024] [Indexed: 05/07/2024] Open
Abstract
INTRODUCTION Preclinical evidence demonstrated the therapeutic potential of thiazolidinediones (TZDs) for the treatment of intracerebral hemorrhage (ICH). The present study conducted an investigation of cerebrovascular and cardiovascular outcomes following ICH in patients with type 2 diabetes mellitus (T2DM) treated with or without TZDs. METHODS This retrospective nested case-control study used data from the Taiwan National Health Insurance Research Database. A total of 62,515 T2DM patients who were hospitalized with a diagnosis of ICH were enrolled, including 7,603 TZD users. Data for TZD non-users were extracted using propensity score matching. Primary outcomes included death and major adverse cardiovascular events (MACEs), which were defined as a composite of ischemic stroke, hemorrhagic stroke (HS), acute myocardial infarction, and congestive heart failure. Patients aged <20 years with a history of traumatic brain injury or any prior history of MACEs were excluded. RESULTS TZD users had significantly lower MACE risks compared with TZD non-users following ICH (adjusted hazard ratio [aHR]: 0.90, 95% confidence interval [CI]: 0.85-0.94, p < 0.001). The most significant MACE difference reported for TZD users was HS, which possessed lower incidence than in TZD non-users, especially for the events that happened within 3 months following ICH (aHR: 0.74, 95% CI: 0.62-0.89 within 1 month, p < 0.01; aHR: 0.68, 95% CI: 0.54-0.85 between 1 and 3 month). CONCLUSION The use of TZD in patients with T2DM was associated with a lower risk of subsequent HS and mortality following ICH.
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Affiliation(s)
- Cheng-Di Chiu
- School of Medicine, China Medical University, Taichung, Taiwan,
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan,
- Department of Neurosurgery, China Medical University Hospital, Taichung, Taiwan,
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan,
| | - You-Pen Chiu
- School of Medicine, China Medical University, Taichung, Taiwan
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan
| | - Hei-Tung Yip
- School of Medicine, China Medical University, Taichung, Taiwan
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
| | - Hui-Ru Ji
- School of Medicine, China Medical University, Taichung, Taiwan
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan
| | - Der-Yang Cho
- Department of Neurosurgery, China Medical University Hospital, Taichung, Taiwan
| | - Irene Han-Juo Cheng
- Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Cho-Yi Chen
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Biomedical Informatics, National Yang Ming Chiao Tung University, Taipei, Taiwan
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Xie XD, Dong SS, Liu RJ, Shi LL, Zhu T. Mechanism of Efferocytosis in Determining Ischaemic Stroke Resolution-Diving into Microglia/Macrophage Functions and Therapeutic Modality. Mol Neurobiol 2024:10.1007/s12035-024-04060-4. [PMID: 38409642 DOI: 10.1007/s12035-024-04060-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/17/2024] [Indexed: 02/28/2024]
Abstract
After ischaemic cerebral vascular injury, efferocytosis-a process known as the efficient clearance of apoptotic cells (ACs) by various phagocytes in both physiological and pathological states-is crucial for maintaining central nervous system (CNS) homeostasis and regaining prognosis. The mechanisms of efferocytosis in ischaemic stroke and its influence on preventing inflammation progression from secondary injury were still not fully understood, despite the fact that the fundamental process of efferocytosis has been described in a series of phases, including AC recognition, phagocyte engulfment, and subsequent degradation. The genetic reprogramming of macrophages and brain-resident microglia after an ischaemic stroke has been equated by some researchers to that of the peripheral blood and brain. Based on previous studies, some molecules, such as signal transducer and activator of transcription 6 (STAT6), peroxisome proliferator-activated receptor γ (PPARG), CD300A, and sigma non-opioid intracellular receptor 1 (SIGMAR1), were discovered to be largely associated with aspects of apoptotic cell elimination and accompanying neuroinflammation, such as inflammatory cytokine release, phenotype transformation, and suppressing of antigen presentation. Exacerbated stroke outcomes are brought on by defective efferocytosis and improper modulation of pertinent signalling pathways in blood-borne macrophages and brain microglia, which also results in subsequent tissue inflammatory damage. This review focuses on recent researches which contain a number of recently discovered mechanisms, such as studies on the relationship between benign efferocytosis and the regulation of inflammation in ischaemic stroke, the roles of some risk factors in disease progression, and current immune approaches that aim to promote efferocytosis to treat some autoimmune diseases. Understanding these pathways provides insight into novel pathophysiological processes and fresh characteristics, which can be used to build cerebral ischaemia targeting techniques.
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Affiliation(s)
- Xiao-Di Xie
- Department of Pathophysiology, School of Basic Medicine, Institute of Neuroregeneration & Neurorehabilitation, Qingdao University, No. 308 Ningxia Road, Qingdao, China
| | - Shan-Shan Dong
- Department of Pathophysiology, School of Basic Medicine, Institute of Neuroregeneration & Neurorehabilitation, Qingdao University, No. 308 Ningxia Road, Qingdao, China
- Department of Rehabilitation Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ru-Juan Liu
- Department of Pathophysiology, School of Basic Medicine, Institute of Neuroregeneration & Neurorehabilitation, Qingdao University, No. 308 Ningxia Road, Qingdao, China
- Department of Rehabilitation Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Liu-Liu Shi
- Department of Pathophysiology, School of Basic Medicine, Institute of Neuroregeneration & Neurorehabilitation, Qingdao University, No. 308 Ningxia Road, Qingdao, China
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ting Zhu
- Department of Pathophysiology, School of Basic Medicine, Institute of Neuroregeneration & Neurorehabilitation, Qingdao University, No. 308 Ningxia Road, Qingdao, China.
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Xiang X, Xin X, Hou Y, Deng Y, Liu X, Yu W. Diosgenin alters LPS-induced macrophage polarization by activating PPARγ/NF-κB signaling pathway. Int Immunopharmacol 2024; 126:111270. [PMID: 38029551 DOI: 10.1016/j.intimp.2023.111270] [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: 08/15/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 12/01/2023]
Abstract
Diosgenin (DG) is a steroidal saponin derived from plants, and it exhibits anti-inflammatory properties. In this study, we employed an in vitro model of P.g.-LPS-stimulated mouse macrophage cell line RAW264.7 to investigate the anti-inflammatory effects and mechanism of DG under the condition of altered polarization of macrophages. The RAW264.7 cells were subjected to pre-treatment with DG with or without P.g.-LPS. In cultured macrophages, DG inhibited P.g.-LPS-induced pro-inflammatory M1 macrophages, and increased anti-inflammatory M2 macrophages. Notably, DG reduced the expression of phosphorylation levels of NF-κB p65 and IκB while increasing the expression of PPARγ. Further studies revealed that PPARγ inhibitor GW9662 or PPARγ siRNA reversed the inhibitory effect of DG on M1 phenotype. Collectively, the anti-inflammatory mechanism of DG is related to altering macrophage polarization by activating PPARγ and inhibiting NF-κB signaling pathways.
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Affiliation(s)
- Xingchen Xiang
- Department of Periodontology, Hospital of Stomatology, Jilin University, Changchun, China; Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun, China
| | - Xirui Xin
- Department of Periodontology, Hospital of Stomatology, Jilin University, Changchun, China
| | - Yubo Hou
- Department of Periodontology, Hospital of Stomatology, Jilin University, Changchun, China
| | - Yu Deng
- Department of Periodontology, Hospital of Stomatology, Jilin University, Changchun, China
| | - Xinchan Liu
- Department of Oral Implantology, Hospital of Stomatology, Jilin University, Changchun, China.
| | - Weixian Yu
- Department of Periodontology, Hospital of Stomatology, Jilin University, Changchun, China; Department of Oral Geriatrics, Hospital of Stomatology, Jilin University, Changchun, China; Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun, China.
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Faysal M, Khan J, Zehravi M, Nath N, Singh LP, Kakkar S, Perusomula R, Khan PA, Nainu F, Asiri M, Khan SL, Das R, Emran TB, Wilairatana P. Neuropharmacological potential of honokiol and its derivatives from Chinese herb Magnolia species: understandings from therapeutic viewpoint. Chin Med 2023; 18:154. [PMID: 38001538 PMCID: PMC10668527 DOI: 10.1186/s13020-023-00846-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/30/2023] [Indexed: 11/26/2023] Open
Abstract
Honokiol is a neolignan biphenol found in aerial parts of the Magnolia plant species. The Magnolia plant species traditionally belong to China and have been used for centuries to treat many pathological conditions. Honokiol mitigates the severity of several pathological conditions and has the potential to work as an anti-inflammatory, anti-angiogenic, anticancer, antioxidant, and neurotherapeutic agent. It has a long history of being employed in the healthcare practices of Southeast Asia, but in recent years, a greater scope of research has been conducted on it. Plenty of experimental evidence suggests it could be beneficial as a neuroprotective bioactive molecule. Honokiol has several pharmacological effects, leading to its exploration as a potential therapy for neurological diseases (NDs), including Alzheimer's disease (AD), Parkinson's disease (PD), cerebral ischemia, anxiety, depression, spinal cord injury, and so on. So, based on the previous experimentation reports, our goal is to discuss the neuroprotective properties of honokiol. Besides, honokiol derivatives have been highlighted recently as possible therapeutic options for NDs. So, this review focuses on honokiol's neurotherapeutic actions and toxicological profile to determine their safety and potential use in neurotherapeutics.
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Affiliation(s)
- Md Faysal
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh
| | - Jishan Khan
- Department of Pharmacy, International Islamic University Chittagong, Kumira, Chittagong, 4318, Bangladesh
| | - Mehrukh Zehravi
- Department of Clinical Pharmacy, College of Dentistry & Pharmacy, Buraydah Private Colleges, 51418, Buraydah, Saudi Arabia.
| | - Nikhil Nath
- Department of Pharmacy, International Islamic University Chittagong, Kumira, Chittagong, 4318, Bangladesh
| | - Laliteshwar Pratap Singh
- Department of Pharmaceutical Chemistry, Narayan Institute of Pharmacy, Gopal Narayan Singh University, Jamuhar, Sasaram, (Rohtas), Bihar, 821305, India
| | - Saloni Kakkar
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana, 124001, India
| | - Rajashekar Perusomula
- Cognitive Science Research Initiative Lab, Vishnu Institute of Pharmaceutical Education & Research, Narsapur, India
| | - Pathan Amanulla Khan
- Department of Pharmacy Practice, Anwar Ul Uloom College of Pharmacy, New Mallepally, Hyderabad, India
| | - Firzan Nainu
- Department of Pharmacy, Faculty of Pharmacy, Hasanuddin University, Makassar, 90245, Indonesia
| | - Mohammed Asiri
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Sharuk L Khan
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa, Maharashtra, 413520, India
| | - Rajib Das
- Department of Pharmacy, Faculty of Pharmacy, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Talha Bin Emran
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh.
- Department of Pathology and Laboratory Medicine, Warren Alpert Medical School & Legorreta Cancer Center, Brown University, Providence, RI 02912, USA.
| | - Polrat Wilairatana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand.
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Wroński A, Dobrzyńska I, Sękowski S, Łuczaj W, Olchowik-Grabarek E, Skrzydlewska E. Cannabidiol and Cannabigerol Modify the Composition and Physicochemical Properties of Keratinocyte Membranes Exposed to UVA. Int J Mol Sci 2023; 24:12424. [PMID: 37569799 PMCID: PMC10418984 DOI: 10.3390/ijms241512424] [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: 07/05/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
The action of UVA radiation (both that derived from solar radiation and that used in the treatment of skin diseases) modifies the function and composition of keratinocyte membranes. Therefore, this study aimed to assess the effects of phytocannabinoids (CBD and CBG), used singly and in combination, on the contents of phospholipids, ceramides, lipid rafts and sialic acid in keratinocyte membranes exposed to UVA radiation, together with their structure and functionality. The phytocannabinoids, especially in combination (CBD+CBG), partially prevented increased levels of phosphatidylinositols and sialic acid from occurring and sphingomyelinase activity after the UVA exposure of keratinocytes. This was accompanied by a reduction in the formation of lipid rafts and malondialdehyde, which correlated with the parameters responsible for the integrity and functionality of the keratinocyte membrane (membrane fluidity and permeability and the activity of transmembrane transporters), compared to UVA-irradiated cells. This suggests that the simultaneous use of two phytocannabinoids may have a protective effect on healthy cells, without significantly reducing the therapeutic effect of UV radiation used to treat skin diseases such as psoriasis.
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Affiliation(s)
- Adam Wroński
- Dermatological Specialized Center “DERMAL” NZOZ in Białystok, Nowy Swiat 17/5, 15-453 Białystok, Poland;
| | - Izabela Dobrzyńska
- Laboratory of Bioanalysis, Faculty of Chemistry, University in Białystok, Ciołkowskiego 1K, 15-245 Białystok, Poland;
| | - Szymon Sękowski
- Laboratory of Molecular Biophysics, Department of Microbiology and Biotechnology, Faculty of Biology, University in Białystok, Ciołkowskiego 1J, 15-245 Białystok, Poland; (S.S.); (E.O.-G.)
| | - Wojciech Łuczaj
- Department of Analytical Chemistry, Medical University of Białystok, Mickiewicza 2D, 15-222 Białystok, Poland;
| | - Ewa Olchowik-Grabarek
- Laboratory of Molecular Biophysics, Department of Microbiology and Biotechnology, Faculty of Biology, University in Białystok, Ciołkowskiego 1J, 15-245 Białystok, Poland; (S.S.); (E.O.-G.)
| | - Elżbieta Skrzydlewska
- Department of Analytical Chemistry, Medical University of Białystok, Mickiewicza 2D, 15-222 Białystok, Poland;
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Gao S, Chen X, Yu Z, Du R, Chen B, Wang Y, Cai X, Xu J, Chen J, Duan H, Cai Y, Zheng G. Progress of research on the role of active ingredients of Citri Reticulatae Pericarpium in liver injury. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 115:154836. [PMID: 37119760 DOI: 10.1016/j.phymed.2023.154836] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/01/2023] [Accepted: 04/18/2023] [Indexed: 05/21/2023]
Abstract
BACKGROUND Liver is a vital organ responsible for metabolizing and detoxifying both endogenous and exogenous substances in the body. However, it is susceptible to damage from chemical and natural toxins. The high incidence and mortality rates of liver disease and its associated complications impose a significant economic burden and survival pressure on patients and their families. Various liver diseases exist, including cholestasis, viral and non-viral hepatitis, fatty liver disease, drug-induced liver injury, alcoholic liver injury, and severe end-stage liver diseases such as cirrhosis, hepatocellular carcinoma (HCC), and cholangiocellular carcinoma (CCA). Recent research has shown that flavonoids found in Citri Reticulatae Pericarpium (CRP) have the potential to normalize blood glucose, cholesterol levels, and liver lipid levels. Additionally, these flavonoids exhibit anti-inflammatory properties, prevent oxidation and lipid peroxidation, and reduce liver toxicity, thereby preventing liver injury. Given these promising findings, it is essential to explore the potential of active components in CRP for developing new drugs to treat liver diseases. OBJECTIVE Recent studies have revealed that flavonoids, including hesperidin (HD), hesperetin (HT), naringenin (NIN), nobiletin (NOB), naringin (NRG), tangerine (TN), and erodcyol (ED), are the primary bioactive components in CRP. These flavonoids exhibit various therapeutic effects on liver injury, including anti-oxidative stress, anti-cytotoxicity, anti-inflammatory, anti-fibrosis, and anti-tumor mechanisms. In this review, we have summarized the research progress on the hepatoprotective effects of HD, HT, NIN, NOB, NRG, TN, ED and limonene (LIM), highlighting their underlying molecular mechanisms. Despite their promising effects, the current clinical application of these active ingredients in CRP has some limitations. Therefore, further studies are needed to explore the full potential of these flavonoids and develop new therapeutic strategies for liver diseases. METHODS For this review, we conducted a systematic search of three databases (ScienceNet, PubMed, and Science Direct) up to July 2022, using the search terms "CRP active ingredient," "liver injury," and "flavonoids." The search data followed the PRISMA standard. RESULTS Our findings indicate that flavonoids found in CRP can effectively reduce drug-induced liver injury, alcoholic liver injury, and non-alcoholic liver injury. These therapeutic effects are mainly attributed to the ability of flavonoids to improve liver resistance to oxidative stress and inflammation while normalizing cholesterol and liver lipid levels by exhibiting anti-free radical and anti-lipid peroxidation properties. CONCLUSION Our review provides new insights into the potential of active components in CRP for preventing and treating liver injury by regulating various molecular targets within different cell signaling pathways. This information can aid in the development of novel therapeutic strategies for liver disease.
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Affiliation(s)
- Shuhan Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Xiaojing Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Zhiqian Yu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Rong Du
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Baizhong Chen
- Guangdong Xinbaotang Biological Technology Co., Ltd, Guangdong Jiangmen, 529000, China
| | - Yuxin Wang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Xiaoting Cai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Jiepei Xu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Jiamin Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Huiying Duan
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yi Cai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China.
| | - Guodong Zheng
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China.
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Rahman SO, Khan T, Iqubal A, Agarwal S, Akhtar M, Parvez S, Shah ZA, Najmi AK. Association between insulin and Nrf2 signalling pathway in Alzheimer's disease: A molecular landscape. Life Sci 2023:121899. [PMID: 37394097 DOI: 10.1016/j.lfs.2023.121899] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/17/2023] [Accepted: 06/27/2023] [Indexed: 07/04/2023]
Abstract
Insulin, a well-known hormone, has been implicated as a regulator of blood glucose levels for almost a century now. Over the past few decades, the non-glycemic actions of insulin i.e. neuronal growth and proliferation have been extensively studied. In 2005, Dr. Suzanne de La Monte and her team reported that insulin might be involved in the pathogenesis of Alzheimer's Disease (AD) and thus coined a term "Type-3 diabetes" This hypothesis was supported by several subsequent studies. The nuclear factor erythroid 2- related factor 2 (Nrf2) triggers a cascade of events under the regulation of distinct mechanisms including protein stability, phosphorylation and nuclear cytoplasmic shuttling, finally leading to the protection against oxidative damage. The Nrf2 pathway has been investigated extensively in relevance to neurodegenerative disorders, particularly AD. Many studies have indicated a strong correlation between insulin and Nrf2 signalling pathways both in the periphery and the brainbut merely few of them have focused on elucidating their inter-connective role in AD. The present review emphasizes key molecular pathways that correlate the role of insulin with Nrf2 during AD. The review has also identified key unexplored areas that could be investigated in future to further establish the insulin and Nrf2 influence in AD.
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Affiliation(s)
- Syed Obaidur Rahman
- Pharmaceutical Medicine, Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Tahira Khan
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Ashif Iqubal
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Shivani Agarwal
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Mohd Akhtar
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Suhel Parvez
- Neurobehavioral Pharmacology Laboratory, Department of Medical Elementology and Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Zahoor Ahmad Shah
- Department of Medicinal and Biological Chemistry, University of Toledo, 3000 Arlington Avenue, Toledo, OH 43614, USA
| | - Abul Kalam Najmi
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India.
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Fu P, Zhang M, Wu M, Zhou W, Yin X, Chen Z, Dan C. Research progress of endogenous hematoma absorption after intracerebral hemorrhage. Front Neurol 2023; 14:1115726. [PMID: 36970539 PMCID: PMC10036389 DOI: 10.3389/fneur.2023.1115726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 02/16/2023] [Indexed: 03/12/2023] Open
Abstract
Non-traumatic intraparenchymal brain hemorrhage is referred to as intracerebral hemorrhage (ICH). Although ICH is associated with a high rate of disability and case fatality, active intervention can significantly lower the rate of severe disability. Studies have shown that the speed of hematoma clearance after ICH determines the patient's prognosis. Following ICH, depending on the hematoma volume and mass effect, either surgical- or medication-only conservative treatment is chosen. The goal of promoting endogenous hematoma absorption is more relevant because surgery is only appropriate for a small percentage of patients, and open surgery can cause additional trauma to patients. The primary method of removing hematoma after ICH in the future will involve understanding how to produce and manage macrophage/microglial endogenous phagocytic hematomas. Therefore, it is necessary to elucidate the regulatory mechanisms and key targets for clinical purposes.
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Affiliation(s)
- Peijie Fu
- Department of Neurology, Clinical Medical School of Jiujiang University, Jiujiang, Jiangxi, China
- Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China
| | - Manqing Zhang
- Medical College of Jiujiang University, Jiujiang, Jiangxi, China
| | - Moxin Wu
- Department of Neurology, Clinical Medical School of Jiujiang University, Jiujiang, Jiangxi, China
- Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China
| | - Weixin Zhou
- Department of Neurology, Clinical Medical School of Jiujiang University, Jiujiang, Jiangxi, China
- Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China
| | - Xiaoping Yin
- Department of Neurology, Clinical Medical School of Jiujiang University, Jiujiang, Jiangxi, China
- Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China
| | - Zhiying Chen
- Department of Neurology, Clinical Medical School of Jiujiang University, Jiujiang, Jiangxi, China
- Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China
- *Correspondence: Zhiying Chen
| | - Chuanjun Dan
- Emergency Department, Affiliated Hospital of Jiujiang University, Jiujiang, Jiangxi, China
- Chuanjun Dan
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Liang C, Liu L, Bao S, Yao Z, Bai Q, Fu P, Liu X, Zhang JH, Wang G. Neuroprotection by Nrf2 via modulating microglial phenotype and phagocytosis after intracerebral hemorrhage. Heliyon 2023; 9:e13777. [PMID: 36852060 PMCID: PMC9957781 DOI: 10.1016/j.heliyon.2023.e13777] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 01/02/2023] [Accepted: 02/10/2023] [Indexed: 02/18/2023] Open
Abstract
Activated microglia are divided into pro-inflammatory and anti-inflammatory functional states. In anti-inflammatory state, activated microglia contribute to phagocytosis, neural repair and anti-inflammation. Nrf2 as a major endogenous regulator in hematoma clearance after intracerebral hemorrhage (ICH) has received much attention. This study aims to investigate the mechanism underlying Nrf2-mediated regulation of microglial phenotype and phagocytosis in hematoma clearance after ICH. In vitro experiments, BV-2 cells were assigned to normal group and administration group (Nrf2-siRNA, Nrf2 agonists Monascin and Xuezhikang). In vivo experiments, mice were divided into 5 groups: sham, ICH + vehicle, ICH + Nrf2-/-, ICH + Monascin and ICH + Xuezhikang. In vitro and in vivo, 72 h after administration of Monascin and Xuezhikang, the expression of Nrf2, inflammatory-associated factors such as Trem1, TNF-α and CD80, anti-inflammatory, neural repair and phagocytic associated factors such as Trem2, CD206 and BDNF were analyzed by the Western blot method. In vitro, fluorescent latex beads or erythrocytes were uptaken by BV-2 cells in order to study microglial phagocytic ability. In vivo, hemoglobin levels reflect the hematoma volume. In this study, Nrf2 agonists (Monascin and Xuezhikang) upregulated the expression of Trem2, CD206 and BDNF while decreased the expression of Trem1, TNF-α and CD80 both in vivo and in vitro. At the same time, after Monascin and Xuezhikang treatment, the phagocytic capacity of microglia increased in vitro, neurological deficits improved and hematoma volume lessened in vivo. These results were reversed in the Nrf2-siRNA or the Nrf2-/- mice. All these results indicated that Nrf2 enhanced hematoma clearance and neural repair, improved neurological outcomes through enhancing microglial phagocytosis and alleviating neuroinflammation.
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Key Words
- BDNF, Brain-derived neurotrophic factor
- CNS, Central nervous system
- DAMPs, Danger-associated molecular patterns
- HO-1,Heme oxygenase-1, Hp,Haptoglobin
- Hematoma clearance
- ICH, Intracerebral hemorrhage
- IFNγ,Interferon-gamma, IL-1β,Interleukin 1β
- Intracerebral hemorrhage
- MMP, Matrix metalloproteasesNF-κB,Nuclear factor-kappa light chain enhancer of activated B cells
- Microglial phenotype
- NO, Nitric oxide
- Nrf2
- Nrf2, Nuclear factor erythroid 2-related factor 2
- PPAR-ɤ, Peroxidase proliferator-activated receptor gamma
- Phagocytosis
- TLR4, Toll-like receptor 4
- TNFα, Tumor necrosis factor-α
- Trem1, Triggering receptors I expressed on myeloid cells
- Trem2, Triggering receptors II expressed on myeloid cells
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Affiliation(s)
- Chuntian Liang
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Lirong Liu
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China.,People's Hospital of Yaodu District, Linfen 041000, China
| | - Shuangjin Bao
- Department of Pathology and Pathophysiology, Basic Medical College, Shanxi Medical University, Taiyuan 030000, China
| | - Zhenjia Yao
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Qinqin Bai
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China
| | - Pengcheng Fu
- Department of Neurology, Shenzhen Longhua District Central Hospital, Shenzhen 518000, China
| | - Xiangyu Liu
- Department of Neurology, Shenzhen Longhua District Central Hospital, Shenzhen 518000, China
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA.,Department of Anesthesiology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Gaiqing Wang
- Department of Neurology, Shanxi Medical University, Taiyuan 030000, China.,Department of Neurology, Sanya Central Hospital (Haian Third People's Hospital), Hainan Medical University, Sanya 572000, China
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Lu X, Xu G, Lin Z, Zou F, Liu S, Zhang Y, Fu W, Jiang J, Ma X, Song J. Engineered exosomes enriched in netrin-1 modRNA promote axonal growth in spinal cord injury by attenuating inflammation and pyroptosis. Biomater Res 2023; 27:3. [PMID: 36647161 PMCID: PMC9843879 DOI: 10.1186/s40824-023-00339-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 01/01/2023] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Spinal cord injury (SCI) brings a heavy burden to individuals and society, and there is no effective treatment at present. Exosomes (EX) are cell secreted vesicles containing molecules such as nucleic acids and proteins, which hold promise for the treatment of SCI. Netrin-1 is an axon guidance factor that regulates neuronal growth. We investigated the effects of engineered EX enriched in netrin-1 chemically synthetic modified message RNA (modRNA) in treating SCI in an attempt to find a novel therapeutic approach for SCI. METHODS Netrin-1 modRNA was transfected into bone marrow mesenchymal stem cells to obtain EX enriched with netrin-1 (EX-netrin1). We built an inflammatory model in vitro with lipopolysaccharide (LPS) in vitro to study the therapeutic effect of EX-netrin1 on SCI. For experiments in vitro, ELISA, CCK-8 assay, immunofluorescence staining, lactate dehydrogenase release experiments test, real-time quantitative polymerase chain reaction, and western blot were conducted. At the same time, we constructed a rat model of SCI. MRI, hematoxylin-eosin and Nissl staining were used to assess the extent of SCI in rats. RESULTS In vitro experiments showed that EX had no effect on the viability of oligodendrocytes and PC12 cells. EX-netrin1 could attenuate LPS-induced inflammation and pyroptosis and accelerate axonal/dentritic growth in PC12 cells/oligodendrocytes. In addition, netrin-1 could activate the PI3K/AKT/mTOR signalling pathway upon binding to its receptor unc5b. When Unc5b and PI3K were inhibited, the effect of EX-netrin1 was weakened, which could be reversed by PI3K or mTOR activator. Our in vivo experiments indicated that EX-netrin1 could promote recovery in rats with SCI. CONCLUSION We found that EX-netrin1 regulated inflammation, pyroptosis and axon growth in SCI via the Unc5b/PI3K/AKT/mTOR pathway, which provides a new strategy for the treatment of SCI.
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Affiliation(s)
- Xiao Lu
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Guangyu Xu
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Zhidi Lin
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Fei Zou
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Siyang Liu
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Yuxuan Zhang
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China
| | - Wei Fu
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
| | - Jianyuan Jiang
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China.
| | - Xiaosheng Ma
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China.
| | - Jian Song
- Department of Orthopedics, Huashan Hospital, Fudan University, No. 12, Middle Wulumuqi Road, Jing'an District, Shanghai, 200040, China.
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Qin J, Ma Z, Chen X, Shu S. Microglia activation in central nervous system disorders: A review of recent mechanistic investigations and development efforts. Front Neurol 2023; 14:1103416. [PMID: 36959826 PMCID: PMC10027711 DOI: 10.3389/fneur.2023.1103416] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 02/13/2023] [Indexed: 03/09/2023] Open
Abstract
Microglia are the principal resident immune cells in the central nervous system (CNS) and play important roles in the development of CNS disorders. In recent years, there have been significant developments in our understanding of microglia, and we now have greater insight into the temporal and spatial patterns of microglia activation in a variety of CNS disorders, as well as the interactions between microglia and neurons. A variety of signaling pathways have been implicated. However, to date, all published clinical trials have failed to demonstrate efficacy over placebo. This review summarizes the results of recent important studies and attempts to provide a mechanistic view of microglia activation, inflammation, tissue repair, and CNS disorders.
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14
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Flores JJ, Ding Y, Sherchan P, Zhang JH, Tang J. Annexin A1 upregulates hematoma resolution via the FPR2/p-ERK(1/2)/DUSP1/CD36 signaling pathway after germinal matrix hemorrhage. Exp Neurol 2023; 359:114257. [PMID: 36279933 PMCID: PMC10681750 DOI: 10.1016/j.expneurol.2022.114257] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/29/2022] [Accepted: 10/17/2022] [Indexed: 11/05/2022]
Abstract
Germinal matrix hemorrhage (GMH) is one of the leading causes of morbidity and mortality in preterm infants in the United States, with little progress made in its clinical management. Blood clots disrupting normal cerebrospinal fluid circulation and absorption after germinal matrix hemorrhage are key contributors towards post-hemorrhagic hydrocephalus development. n-formyl peptide receptor 2 (FPR2), a G-protein-coupled receptor, has been associated with the activation of p-ERK1/2, which in turn promotes the transcription of the DUSP1 gene, which may play a role in CD36 signaling. CD36 scavenger, a transmembrane glycoprotein, plays an essential role in microglia phagocytic blood clot clearance after GMH. FPR2's role in blood clot clearance after hemorrhagic stroke is unknown. We hypothesize that FPR2 activation by FPR2 agonist Annexin A1 (AnxA1) will enhance hematoma resolution via the upregulation of the CD36 signaling pathway, thereby improving short- and long-term neurological outcomes. Bacterial collagenase (0.3 U) was infused intraparenchymally into the right hemispheric ganglionic eminence in P7 rat pups to induce GMH. AnxA1 and FPR2 Inhibitor (Boc2) were given at 1-h post-GMH via intranasal administration. FPR2 CRISPR was given 48-h prior to GMH induction. Short-term neurological deficits were assessed using negative geotaxis test. Hematoma volume was assessed using hemoglobin assay. Protein expression was assessed using western blots. Long-term neurocognitive deficits and motor coordination were assessed using Morris water maze, rotarod, and foot fault tests. We have demonstrated that AnxA1 treatment enhances hematoma resolution and improved short and long-term outcomes. Lastly, FPR2 agonist AnxA1 treatment resulted in the upregulation of the FPR2/p-ERK(1/2)/DUSP1/CD36 signaling pathway.
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Affiliation(s)
- Jerry J Flores
- Department of Physiology & Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Yan Ding
- Department of Physiology & Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Prativa Sherchan
- Department of Physiology & Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - John H Zhang
- Department of Physiology & Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA; Departments of Anesthesiology and Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Jiping Tang
- Department of Physiology & Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, USA.
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15
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Zhang D, Cui Y, Zhao M, Zheng X, Li C, Wei J, Wang K, Cui J. Orexin-A exerts neuroprotective effect in experimental intracerebral hemorrhage by suppressing autophagy via OXR1-mediated ERK/mTOR signaling pathway. Front Cell Neurosci 2022; 16:1045034. [PMID: 36619670 PMCID: PMC9815810 DOI: 10.3389/fncel.2022.1045034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022] Open
Abstract
Background Orexin-A (OXA) is a polypeptide produced in the hypothalamus, which binds to specific receptors and exerts multiple physiological effects. Autophagy plays a vital role in early brain injury (EBI) after intracerebral hemorrhage (ICH). However, the relationship between OXA and autophagy after ICH has not been confirmed. Methods In this study, the protective role of OXA was investigated in a model of hemin-induced injury in PC12 cells and blood-injection ICH model in rats, and its potential molecular mechanism was clarified. Neurobehavioral tests, brain water content, and pathologic morphology were assessed after ICH. Cell survival rate was determined using Cell Counting Kit-8 (CCK-8), while apoptosis was detected using flow cytometry. The autophagy protein LC3 that was originally identified as microtubule-associated protein 1 light 3 was evaluated by immunohistochemistry. The ultrastructural changes of cells following ICH were observed by transmission electron microscopy. Western blotting was performed to determine the expression levels of LC3, p62/SQSTM1 (p62), phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK1/2), total extracellular signal-regulated kinase 1/2 (t-ERK1/2), mammalian target of rapamycin (mTOR), and phosphorylated mammalian target of rapamycin (p-mTOR). Results OXA treatment significantly improved neurofunctional outcomes, reduced brain edema, and alleviated neuronal apoptosis. OXA administration upregulated p-mTOR and p62, while it downregulated p-ERK1/2 and LC3; this effect was reversed by the orexin receptor 1 (OXR1) antagonist SB-334867. Conclusions This study demonstrates that OXA suppresses autophagy via the OXR1-mediated ERK/mTOR signaling pathway to exert neuroprotective effects, and it might provide a novel therapeutic approach in patients suffering from ICH.
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Affiliation(s)
- Dexin Zhang
- Department of Surgery, Hebei Medical University, Shijiazhuang, China
| | - Ying Cui
- Department of Neurology, Tangshan Gongren Hospital, Tangshan, China
| | - Manman Zhao
- Department of Histology and Embryology, North China University of Science and Technology, Tangshan, China
| | - Xuecheng Zheng
- Department of Surgery, Hebei Medical University, Shijiazhuang, China
| | - Chunyan Li
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Jingbo Wei
- Department of Histology and Embryology, North China University of Science and Technology, Tangshan, China
| | - Kaijie Wang
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, China
| | - Jianzhong Cui
- Department of Surgery, Hebei Medical University, Shijiazhuang, China,Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, China,*Correspondence: Jianzhong Cui,
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Synergistic Effects of Ginsenoside Rb3 and Ferruginol in Ischemia-Induced Myocardial Infarction. Int J Mol Sci 2022; 23:ijms232415935. [PMID: 36555577 PMCID: PMC9785845 DOI: 10.3390/ijms232415935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Previous research shows that ginsenoside Rb3 (G-Rb3) exhibit significant protective effects on cardiomyocytes and is considered a promising treatment for myocardial infraction (MI). However, how to improve its oral bioavailability and reduce its dosage remains to be studied. Previous studies suggest that Ferruginol (FGL) may have synergistic effects with G-Rb3. However, the underlying mechanisms remain to be explored. In this study, left anterior descending branch (LAD) coronary artery ligation or oxygen-glucose deprivation-reperfusion (OGD/R) were used to establish MI models in vivo and in vitro. Subsequently, the pharmacological effects and mechanisms of G-Rb3-FGL were explored by in vitro studies. The results showed that the G-Rb3-FGL co-treatment improved heart functions better than the G-Rb3 treatment alone in MI mice models. Meanwhile, the G-Rb3-FGL co-treatment can upregulate fatty acids oxidation (FAO) and suppress oxidative stress in the heart tissues of MI mice. In vitro studies demonstrated that the synergistic effect of G-Rb3-FGL on FAO, oxidation and inflammation was abolished by RXRα inhibitor HX531 in the H9C2 cell model. In summary, we revealed that G-Rb3 and FGL have a synergistic effect against MI. They protected cardiomyocytes by promoting FAO, inhibiting oxidative stress, and suppressing inflammation through the RXRα-Nrf2 signaling pathway.
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Atalay Ekiner S, Gęgotek A, Skrzydlewska E. The molecular activity of cannabidiol in the regulation of Nrf2 system interacting with NF-κB pathway under oxidative stress. Redox Biol 2022; 57:102489. [PMID: 36198205 PMCID: PMC9535304 DOI: 10.1016/j.redox.2022.102489] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/11/2022] [Accepted: 09/22/2022] [Indexed: 11/30/2022] Open
Abstract
Cannabidiol (CBD), the major non-psychoactive phytocannabinoid of Cannabis sativa L., is one of the most studied compounds in pharmacotherapeutic approaches to treat oxidative stress-related diseases such as cardiovascular, metabolic, neurodegenerative, and neoplastic diseases. The literature data to date indicate the possibility of both antioxidant and pro-oxidative effects of CBD. Thus, the mechanism of action of this natural compound in the regulation of nuclear factor 2 associated with erythroid 2 (Nrf2), which plays the role of the main cytoprotective regulator of redox balance and inflammation under oxidative stress conditions, seems to be particularly important. Moreover, Nrf2 is strongly correlated with the cellular neoplastic profile and malignancy, which in turn is critical in determining the cellular response induced by CBD under pathophysiological conditions. This paper summarizes the CBD-mediated pathways of regulation of the Nrf2 system by altering the expression and modification of both proteins directly involved in Nrf2 transcriptional activity and proteins involved in the relationship between Nrf2 and the nuclear factor kappa B (NF-κB) which is another redox-sensitive transcription factor.
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Affiliation(s)
- Sinemyiz Atalay Ekiner
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222, Bialystok, Poland.
| | - Agnieszka Gęgotek
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222, Bialystok, Poland.
| | - Elżbieta Skrzydlewska
- Department of Analytical Chemistry, Medical University of Bialystok, Mickiewicza 2D, 15-222, Bialystok, Poland.
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Xia S, Zheng Y, Yan F, Chen G. MicroRNAs modulate neuroinflammation after intracerebral hemorrhage: Prospects for new therapy. Front Immunol 2022; 13:945860. [PMID: 36389834 PMCID: PMC9665326 DOI: 10.3389/fimmu.2022.945860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 10/13/2022] [Indexed: 12/03/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is the most common subtype of hemorrhagic stroke. After ICH, blood components extravasate from vessels into the brain, activating immune cells and causing them to release a series of inflammatory mediators. Immune cells, together with inflammatory mediators, lead to neuroinflammation in the perihematomal region and the whole brain, and neuroinflammation is closely related to secondary brain injury as well as functional recovery of the brain. Despite recent progress in understanding the pathophysiology of ICH, there is still no effective treatment for this disease. MicroRNAs (miRNAs) are non-coding RNAs 17-25 nucleotides in length that are generated naturally in the human body. They bind complementarily to messenger RNAs and suppress translation, thus regulating gene expression at the post-transcriptional level. They have been found to regulate the pathophysiological process of ICH, particularly the neuroinflammatory cascade. Multiple preclinical studies have shown that manipulating the expression and activity of miRNAs can modulate immune cell activities, influence neuroinflammatory responses, and ultimately affect neurological functions after ICH. This implicates the potentially crucial roles of miRNAs in post-ICH neuroinflammation and indicates the possibility of applying miRNA-based therapeutics for this disease. Thus, this review aims to address the pathophysiological roles and molecular underpinnings of miRNAs in the regulation of neuroinflammation after ICH. With a more sophisticated understanding of ICH and miRNAs, it is possible to translate these findings into new pharmacological therapies for ICH.
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Affiliation(s)
- Siqi Xia
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yonghe Zheng
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Zhejiang University, Hangzhou, Zhejiang, China
| | - Feng Yan
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Zhejiang University, Hangzhou, Zhejiang, China,*Correspondence: Feng Yan, ; Gao Chen,
| | - Gao Chen
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, Zhejiang University, Hangzhou, Zhejiang, China,*Correspondence: Feng Yan, ; Gao Chen,
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Zhu JJ, Stenfeldt C, Bishop EA, Canter JA, Eschbaumer M, Rodriguez LL, Arzt J. Inferred Causal Mechanisms of Persistent FMDV Infection in Cattle from Differential Gene Expression in the Nasopharyngeal Mucosa. Pathogens 2022; 11:pathogens11080822. [PMID: 35894045 PMCID: PMC9329776 DOI: 10.3390/pathogens11080822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 02/05/2023] Open
Abstract
Foot-and-mouth disease virus (FMDV) can persistently infect pharyngeal epithelia in ruminants but not in pigs. Our previous studies demonstrated that persistent FMDV infection in cattle was associated with under-expression of several chemokines that recruit immune cells. This report focuses on the analysis of differentially expressed genes (DEG) identified during the transitional phase of infection, defined as the period when animals diverge between becoming carriers or terminators. During this phase, Th17-stimulating cytokines (IL6 and IL23A) and Th17-recruiting chemokines (CCL14 and CCL20) were upregulated in animals that were still infected (transitional carriers) compared to those that had recently cleared infection (terminators), whereas chemokines recruiting neutrophils and CD8+ T effector cells (CCL3 and ELR+CXCLs) were downregulated. Upregulated Th17-specific receptor, CCR6, and Th17-associated genes, CD146, MIR155, and ThPOK, suggested increased Th17 cell activity in transitional carriers. However, a complex interplay of the Th17 regulatory axis was indicated by non-significant upregulation of IL17A and downregulation of IL17F, two hallmarks of TH17 activity. Other DEG suggested that transitional carriers had upregulated aryl hydrocarbon receptor (AHR), non-canonical NFκB signaling, and downregulated canonical NFκB signaling. The results described herein provide novel insights into the mechanisms of establishment of FMDV persistence. Additionally, the fact that ruminants, unlike pigs, produce a large amount of AHR ligands suggests a plausible explanation of why FMDV persists in ruminants, but not in pigs.
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Affiliation(s)
- James J. Zhu
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
- Correspondence: (J.J.Z.); (J.A.); Tel.: +1-631-323-3340 (J.J.Z.); +1-631-323-4421 (J.A.); Fax: +1-631-323-3006 (J.A.)
| | - Carolina Stenfeldt
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS 66506, USA
| | - Elizabeth A. Bishop
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
| | - Jessica A. Canter
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
- Plum Island Animal Disease Center Research Participation Program, Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN 37830, USA
| | - Michael Eschbaumer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany;
| | - Luis L. Rodriguez
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
| | - Jonathan Arzt
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Orient, NY 11957, USA; (C.S.); (E.A.B.); (J.A.C.); (L.L.R.)
- Correspondence: (J.J.Z.); (J.A.); Tel.: +1-631-323-3340 (J.J.Z.); +1-631-323-4421 (J.A.); Fax: +1-631-323-3006 (J.A.)
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20
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Li X, Wang B, Yu N, Yang L, Nan C, Sun Z, Guo L, Zhao Z. Gabapentin Alleviates Brain Injury in Intracerebral Hemorrhage Through Suppressing Neuroinflammation and Apoptosis. Neurochem Res 2022; 47:3063-3075. [PMID: 35809188 DOI: 10.1007/s11064-022-03657-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 06/09/2022] [Accepted: 06/11/2022] [Indexed: 11/29/2022]
Abstract
Neuroinflammation plays an important role in brain tissue injury during intracerebral hemorrhage. Gabapentin can reduce inflammation and oxidative stress through inhibiting nuclear factor κB (NFκB) signals. Here, we showed that gabapentin reduced brain tissue injury in ICH through suppressing NFκB-mediated neuroinflammation. ICH was induced by injecting collagenase IV into the right striatum of Sprague-Dawley rats. PC12 and BV2 cells injury induced by Hemin were used to simulate ICH in vitro. Inflammation and apoptosis were assessed in rat brain tissue and in vitro cells. The neurobehavioral scores were significantly decreased in ICH rats compared with sham rats. Phosphorylated IκB-α and cleaved caspase3, and apoptosis rate were significantly higher in tissue surrounding the hematoma than in brain tissues from rats subjected to sham surgery. Furthermore, serum IL-6 levels in ICH rats were higher than in sham rats. Gabapentin treatment significantly improved the behavioral scores, decreased levels of phosphorylated IκB-α and cleaved caspase3, apoptosis rate, and serum IL-6 level in ICH rats. Hemin-treated BV2 cells displayed higher levels of phosphorylated IκB-α, cleaved caspase3, and IL-6 in the supernatant compared with vehicle-treated cells. Hemin treatment induced a significantly lower level of peroxisome proliferator-activated receptor γ (PPARγ) in BV2 cells. BV2-PC12 co-culture cells treated by hemin displayed higher levels of cleaved caspase3 in PC12 cells. Furthermore, gabapentin treatment could reduce these effects induced by hemin and the protective effects of gabapentin were significantly attenuated by PPARγ inhibitor. Therefore, gabapentin may reduce inflammation and apoptosis induced by the ICH through PPARγ-NFκB pathway.
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Affiliation(s)
- Xiaopeng Li
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China.,Department of Neurosurgery, The First Hospital of Handan City, Handan, 056000, HeBei, China
| | - Bingqian Wang
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China.,Department of Neurosurgery, Affiliated Xing Tai People Hospital of Hebei Medical University, Xingtai, 054000, HeBei, China
| | - Ning Yu
- Department of Anesthesiology and Intensive Care Unit, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, HeBei, China
| | - Liang Yang
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China
| | - Chengrui Nan
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China
| | - Zhimin Sun
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China.,Department of Neurosurgery, The Third Hospital of Shijiazhuang City, Shijiazhuang, 050000, HeBei, China
| | - Lisi Guo
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China
| | - Zongmao Zhao
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, 050000, HeBei, China.
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21
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Protective effects of fraxin on cerebral ischemia-reperfusion injury by mediating neuroinflammation and oxidative stress through PPAR-γ/NF-κB pathway. Brain Res Bull 2022; 187:49-62. [PMID: 35772607 DOI: 10.1016/j.brainresbull.2022.06.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 05/24/2022] [Accepted: 06/25/2022] [Indexed: 02/06/2023]
Abstract
BACKGROUND Inflammation and oxidative stress are associated with the pathogenesis of cerebral ischemia-reperfusion (I/R) injury. Fraxin, one of the primary active ingredients of Cortex Fraxini, may have potent anti-inflammatory activity. This study intended to investigate the function and mechanism of fraxin in a middle cerebral artery occlusion (MCAO) model. METHODS A middle cerebral artery occlusion (MCAO) rat model was engineered. Both in-vivo and in-vitro models were dealt with Fraxin. The profiles of inflammation-concerned cytokines, proteins and oxidative stress factors were determined by RT-PCR, western blot, and enzyme-linked immunosorbent assay (ELISA), and neuronal apoptosis and reactive oxygen species (ROS) levels were measured. The neurological functions of rats were evaluated by Morris water maze and modified neurological severity scores (mNSS). RESULTS The data revealed that fraxin abated the OGD/R-mediated release of inflammatory and oxidative stress mediators, enhanced "M2″-like BV2 microglia polarization, and mitigated HT22 cell apoptosis. Mechanistically, fraxin boosted PPAR-γ expression, activated the Nrf2/HO-1 pathway, and suppressed NF-κB, IKK-β,p38 MAPK, ERK1/2 and Keap1 in a dose-dependent manner. Furthermore, attenuating PPAR-γ through pharmacological treatment with GW9662 (a PPAR-γ antagonist) mainly weakened the neuroprotective and anti-inflammatory functions of fraxin. CONCLUSION Fraxin could considerably ameliorate cerebral I/R damage by repressing oxidative stress, inflammatory response, and cell apoptosis through abrogating the PPARγ/ NF-κB pathway.
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22
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Zhu S, Liu F, Zhang R, Xiong Z, Zhang Q, Hao L, Chen S. Neuroprotective Potency of Neolignans in Magnolia officinalis Cortex Against Brain Disorders. Front Pharmacol 2022; 13:857449. [PMID: 35784755 PMCID: PMC9244706 DOI: 10.3389/fphar.2022.857449] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/20/2022] [Indexed: 12/03/2022] Open
Abstract
In recent years, neurological diseases including Alzheimer’s disease, Parkinson’s disease and stroke are one of the main causes of death in the world. At the same time, the incidence of psychiatric disorders including depression and anxiety has been increasing. Accumulating elderly and stressed people suffer from these brain disorders, which is undoubtedly a huge burden on the modern aging society. Neolignans, the main active ingredients in Magnolia officinalis cortex, were reported to have neuroprotective effects. In addition, the key bioactive ingredients of neolignans, magnolol (1) and honokiol (2), were proved to prevent and treat neurological diseases and psychiatric disorders by protecting nerve cells and brain microvascular endothelial cells (BMECs). Furthermore, neolignans played a role in protecting nerve cells via regulation of neuronal function, suppression of neurotoxicity, etc. This review summarizes the neuroprotective effect, primary mechanisms of the leading neolignans and provides new prospects for the treatment of brain disorders in the future.
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Affiliation(s)
- Shun Zhu
- State Key Laboratory of Southwestern Chinese Medicine Resources, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fang Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Fang Liu, ; Shiyin Chen,
| | - Ruiyuan Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zongxiang Xiong
- State Key Laboratory of Southwestern Chinese Medicine Resources, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qian Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li Hao
- Huarun Sanjiu (ya’an) Pharmaceutical Group Co., LTD., Ya’an, China
| | - Shiyin Chen
- Department of Orthopedics of Traditional Chinese Medicine, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- *Correspondence: Fang Liu, ; Shiyin Chen,
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23
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Parny M, Coste A, Aubouy A, Rahabi M, Prat M, Pipy B, Treilhou M. Differential immunomodulatory effects of six pesticides of different chemical classes on human monocyte-derived macrophage functions. Food Chem Toxicol 2022; 163:112992. [PMID: 35395341 DOI: 10.1016/j.fct.2022.112992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/04/2022] [Accepted: 04/03/2022] [Indexed: 01/19/2023]
Abstract
Exposure to pesticides through eyes, skin, ingestion and inhalation may affects human health by interfering with immune cells, such as macrophages. We evaluated, in vitro, the effect of six pesticides widely used in apple arboriculture on the functions of human monocyte-derived macrophages (hMDMs). hMDMs were cultured for 4 or 24 h with or without pesticides (0.01, 0.1, 1, 10 μmol.L-1). We showed that chlorpyrifos, thiacloprid, thiophanate, boscalid, and captan had little toxic effect at the tested concentrations, while dithianon had low-cytotoxicity at 10 μmol.L-1. While boscalid showed no effect on hMDMs function, thiophanate (0.01 μmol.L-1) stimulated with TPA and thiacloprid (1, 10 μmol.L-1) stimulated with zymosan activated ROS production. Chlorpyrifos, dithianon, and captan inhibited ROS production and TNF-α, IL-1β pro-inflammatory cytokines. We established that dithianon (0.01-1 μmol.L-1) and captan (0.1, 1 μmol.L-1) induced mRNA expression of NQO1 and HMOX1 antioxidant enzymes. Dithianon also induced the mRNA expression of catalase, superoxide dismutase-2 at 10 μmol.L-1. Together, these results show that exposure to chlorpyrifos, dithianon, and captan induce immunomodulatory effects that may influence the disease fighting properties of monocytes/macrophages while pesticides such as thiacloprid, thiophanate and boscalid have little influence.
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Affiliation(s)
- Melissa Parny
- EA7417, BTSB, Université Fédérale Toulouse Midi-Pyrénées, INU Champollion, Albi, France; PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Agnès Coste
- PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Agnès Aubouy
- PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Mouna Rahabi
- PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Melissa Prat
- PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Bernard Pipy
- PHARMADEV UMR 152, Institut de Recherche pour le Développement (IRD), Université Paul Sabatier Toulouse 3, Toulouse, France.
| | - Michel Treilhou
- EA7417, BTSB, Université Fédérale Toulouse Midi-Pyrénées, INU Champollion, Albi, France.
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24
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Wang Z, Chen X, Liu J, Wang Y, Zhang S. Inclisiran inhibits oxidized low-density lipoprotein-induced foam cell formation in Raw264.7 macrophages via activating the PPARγ pathway. Autoimmunity 2022; 55:223-232. [PMID: 35289693 DOI: 10.1080/08916934.2022.2051142] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Proprotein convertase subtilisin kexin type 9 (PCSK9) is a well-known proprotein convertase that influences foam cell formation and modulates atherosclerosis. Inclisiran is a novel chemosynthetic small interfering RNA that inhibits PCSK9 synthesis. This study aimed to explore the effect of inclisiran on oxidized low-density lipoprotein (ox-LDL)-induced foam cell formation in Raw264.7 macrophages and to investigate the underlying mechanisms. Raw264.7 cells were treated with ox-LDL to induce the formation of macrophage-derived foam cells. Oil Red O staining and high-performance liquid chromatography were performed to detect lipid accumulation and cholesterol levels. Dil-ox-LDL uptake assay, CCK-8, RT-qPCR, and Western blotting analysis were performed to examine ox-LDL uptake, cell viability, and expression of scavenger receptor-related factors. Inclisiran reduced lipid accumulation in ox-LDL-treated macrophages in a dose-dependent manner. Inclisiran significantly inhibited the levels of total cholesterol, free cholesterol, and cholesterol ester in the supernatant of Raw264.7 cells. Inclisiran reduced ox-LDL uptake and increased Raw264.7 cell viability. Meanwhile, inclisiran downregulated the expression of SR-A, LOX-1, and CD36 and upregulated SR-BI, ApoE, and ABCA1. Furthermore, inclisiran increased PPARγ activity and decreased NF-κB activity. An inhibitor of PPARγ (T0070907) reversed the beneficial effects of inclisiran on ox-LDL uptake, NF-κB inactivation, and cytokine expression. In conclusion, these data suggested that inclisiran inhibited the formation of macrophage-derived foam cells by activating the PPARγ pathway.HighlightsInclisiran reduces lipid accumulation in Raw264.7 cells;Inclisiran reduces ox-LDL uptake and increases Raw264.7 cell viability;Inclisiran inhibits foam cell formation by activating the PPARγ pathway.
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Affiliation(s)
- Zhaoping Wang
- Department of Emergency, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, P.R. China
| | - Xiangyu Chen
- Department of Emergency, Weihai Municipal Hospital, Weihai, P.R. China
| | - Jingxing Liu
- Emergency Department, Qingdao Municipal Hospital (Group), Qingdao NO.9 People's Hospital, Qingdao, P.R. China
| | - Yingcui Wang
- Department of Cardiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, P.R. China
| | - Suhua Zhang
- Department of Geriatrics, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, P.R. China
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25
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Inhibition of STAT6 Activation by AS1517499 Inhibits Expression and Activity of PPARγ in Macrophages to Resolve Acute Inflammation in Mice. Biomolecules 2022; 12:biom12030447. [PMID: 35327639 PMCID: PMC8946515 DOI: 10.3390/biom12030447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/07/2022] [Accepted: 03/12/2022] [Indexed: 12/10/2022] Open
Abstract
Signal transducer and activator of transcription 6 (STAT6) promotes an anti-inflammatory process by inducing the development of M2 macrophages. We investigated whether modulating STAT6 activity in macrophages using AS1517499, the specific STAT6 inhibitor, affects the restoration of homeostasis after an inflammatory insult by regulating PPARγ expression and activity. Administration of AS1517499 suppressed the enhanced STAT6 phosphorylation and nuclear translocation observed in peritoneal macrophages after zymosan injection. In addition, AS1517499 delayed resolution of acute inflammation as evidenced by enhanced secretion of pro-inflammatory cytokines, reduced secretion of anti-inflammatory cytokines in PLF and supernatants from peritoneal macrophages, and exaggerated neutrophil numbers and total protein levels in PLF. We demonstrate temporal increases in annexin A1 (AnxA1) protein and mRNA levels in peritoneal lavage fluid (PLF), peritoneal macrophages, and spleen in a murine model of zymosan-induced acute peritonitis. In vitro priming of mouse bone marrow-derived macrophages (BMDM) and peritoneal macrophages with AnxA1 induced STAT6 activation with enhanced PPARγ expression and activity. Using AS1517499, we demonstrate that inhibition of STAT6 activation delayed recovery of PPARγ expression and activity, as well as impaired efferocytosis. Taken together, these results suggest that activation of the STAT6 signaling pathway mediates PPARγ expression and activation in macrophages to resolve acute inflammation.
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26
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Liu J, Zhu Z, Leung GKK. Erythrophagocytosis by Microglia/Macrophage in Intracerebral Hemorrhage: From Mechanisms to Translation. Front Cell Neurosci 2022; 16:818602. [PMID: 35237132 PMCID: PMC8882619 DOI: 10.3389/fncel.2022.818602] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/10/2022] [Indexed: 12/17/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is a devastating condition characterized by hematoma related mass effect. Microglia/macrophage (M φ) are rapidly recruited in order to remove the red blood cells through erythrophagocytosis. Efficient erythrophagocytosis can detoxify hemolytic products and facilitate neurological recovery after ICH. The underlying mechanisms include modulation of inflammatory response and oxidative stress, among others. It is a dynamic process mediated by a cascade of signal transduction, including “find-me” signals, “eat-me” signals and a set of phagocytotic receptors-ligand pairs that may be exploited as therapeutic targets. This review summarizes mechanistic signaling pathways of erythrophagocytosis and highlights the potential of harnessing M φ-mediated phagocytosis for ICH treatment.
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Affiliation(s)
- Jiaxin Liu
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, Hong Kong SAR, China
| | - Zhiyuan Zhu
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, Hong Kong SAR, China
- Department of Functional Neurosurgery, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou, China
- Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Gilberto Ka-Kit Leung
- Department of Surgery, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, Hong Kong SAR, China
- *Correspondence: Gilberto Ka-Kit Leung,
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27
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Wei Y, Song X, Gao Y, Gao Y, Li Y, Gu L. Iron toxicity in intracerebral hemorrhage: Physiopathological and therapeutic implications. Brain Res Bull 2021; 178:144-154. [PMID: 34838852 DOI: 10.1016/j.brainresbull.2021.11.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/20/2021] [Accepted: 11/22/2021] [Indexed: 01/09/2023]
Abstract
Intracerebral hemorrhage (ICH)-induced brain injury is a continuous pathological process that involves the deterioration of neurological functions, such as sensory, cognitive or motor functions. Cytotoxic byproducts of red blood cell lysis, especially free iron, appear to be a significant pathophysiologic mechanism leading to ICH-induced injury. Free iron has a crucial role in secondary brain injury after ICH. Chelating iron may attenuate iron-induced neurotoxicity and may be developed as a therapeutic candidate for ICH treatment. In this review, we focused on the potential role of iron toxicity in ICH-induced injury and iron chelation therapy in the management of ICH. It will hopefully advance our understanding of the pathogenesis of ICH and lead to new approaches for treatment.
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Affiliation(s)
- Yufei Wei
- Department of Internal Neurology, First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi 530000, China
| | - Xiaoxiao Song
- Department of Internal Neurology, First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi 530000, China
| | - Ying Gao
- Institute for Brain Disorders, Beijing University of Chinese Medicine, Beijing 100010, China
| | - Yonghong Gao
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing 100010, China
| | - Yuanyuan Li
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing 100010, China
| | - Lian Gu
- Department of Internal Neurology, First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi 530000, China.
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28
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Bi R, Fang Z, You M, He Q, Hu B. Microglia Phenotype and Intracerebral Hemorrhage: A Balance of Yin and Yang. Front Cell Neurosci 2021; 15:765205. [PMID: 34720885 PMCID: PMC8549831 DOI: 10.3389/fncel.2021.765205] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 09/23/2021] [Indexed: 11/15/2022] Open
Abstract
Intracerebral hemorrhage (ICH) features extremely high rates of morbidity and mortality, with no specific and effective therapy. And local inflammation caused by the over-activated immune cells seriously damages the recovery of neurological function after ICH. Fortunately, immune intervention to microglia has provided new methods and ideas for ICH treatment. Microglia, as the resident immune cells in the brain, play vital roles in both tissue damage and repair processes after ICH. The perihematomal activated microglia not only arouse acute inflammatory responses, oxidative stress, excitotoxicity, and cytotoxicity to cause neuron death, but also show another phenotype that inhibit inflammation, clear hematoma and promote tissue regeneration. The proportion of microglia phenotypes determines the progression of brain tissue damage or repair after ICH. Therefore, microglia may be a promising and imperative therapeutic target for ICH. In this review, we discuss the dual functions of microglia in the brain after an ICH from immunological perspective, elaborate on the activation mechanism of perihematomal microglia, and summarize related therapeutic drugs researches.
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Affiliation(s)
- Rentang Bi
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhi Fang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mingfeng You
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Quanwei He
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Hu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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29
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Xu C, Chen H, Zhou S, Sun C, Xia X, Peng Y, Zhuang J, Fu X, Zeng H, Zhou H, Cao Y, Yu Q, Li Y, Hu L, Zhou G, Yan F, Chen G, Li J. Pharmacological Activation of RXR-α Promotes Hematoma Absorption via a PPAR-γ-dependent Pathway After Intracerebral Hemorrhage. Neurosci Bull 2021; 37:1412-1426. [PMID: 34142331 DOI: 10.1007/s12264-021-00735-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/16/2021] [Indexed: 12/26/2022] Open
Abstract
Endogenously eliminating the hematoma is a favorable strategy in addressing intracerebral hemorrhage (ICH). This study sought to determine the role of retinoid X receptor-α (RXR-α) in the context of hematoma absorption after ICH. Our results showed that pharmacologically activating RXR-α with bexarotene significantly accelerated hematoma clearance and alleviated neurological dysfunction after ICH. RXR-α was expressed in microglia/macrophages, neurons, and astrocytes. Mechanistically, bexarotene promoted the nuclear translocation of RXR-α and PPAR-γ, as well as reducing neuroinflammation by modulating microglia/macrophage reprograming from the M1 into the M2 phenotype. Furthermore, all the beneficial effects of RXR-α in ICH were reversed by the PPAR-γ inhibitor GW9662. In conclusion, the pharmacological activation of RXR-α confers robust neuroprotection against ICH by accelerating hematoma clearance and repolarizing microglia/macrophages towards the M2 phenotype through PPAR-γ-related mechanisms. Our data support the notion that RXR-α might be a promising therapeutic target for ICH.
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Affiliation(s)
- Chaoran Xu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Huaijun Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Shengjun Zhou
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Chenjun Sun
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Xiaolong Xia
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Yucong Peng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Jianfeng Zhuang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Xiongjie Fu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Hanhai Zeng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Hang Zhou
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Yang Cao
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Qian Yu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Yin Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Libin Hu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Guoyang Zhou
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Feng Yan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Gao Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China.
| | - Jianru Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China.
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Lu J, Li Z, Zhao Q, Liu D, Mei YA. Neuritin improves the neurological functional recovery after experimental intracerebral hemorrhage in mice. Neurobiol Dis 2021; 156:105407. [PMID: 34058347 DOI: 10.1016/j.nbd.2021.105407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/06/2021] [Accepted: 05/26/2021] [Indexed: 11/16/2022] Open
Abstract
Stroke is one of the leading causes of death worldwide, with intracerebral hemorrhage (ICH) being the most lethal subtype. Neuritin (Nrn) is a neurotropic factor that has been reported to have neuroprotective effects in acute brain and spinal cord injury. However, whether Nrn has a protective role in ICH has not been investigated. In this study, ICH was induced in C57BL/6 J mice by injection of collagenase VII, while the overexpression of Nrn in the striatum was induced by an adeno-associated virus serotype 9 (AAV9) vector. We found that compared with GFP-ICH mice, Nrn-ICH mice showed improved performance in the corner, cylinder and forelimb tests after ICH, and showed less weight loss and more rapid weight recovery. Overexpression of Nrn reduced brain lesions, edema, neuronal death and white matter and synaptic integrity dysfunction caused by ICH. Western blot results showed that phosphorylated PERK and ATF4 were significantly inhibited, while phosphorylation of Akt/mammalian target of rapamycin was increased in the Nrn-ICH group, compared with the GFP-ICH group. Whole cell recording from motor neurons indicated that overexpression of Nrn reversed the decrease of spontaneous excitatory postsynaptic currents (sEPSCs) and action potential frequencies induced by ICH. These data show that Nrn improves neurological deficits in mice with ICH by reducing brain lesions and edema, inhibiting neuronal death, and possibly by increasing neuronal connections.
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Affiliation(s)
- Junmei Lu
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and School of Life Sciences, Fudan University, Shanghai 200438, China.
| | - Zhaoyang Li
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Qianru Zhao
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Dongdong Liu
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yan-Ai Mei
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and School of Life Sciences, Fudan University, Shanghai 200438, China.
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31
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Nguyen D, Tran V, Shirazian A, Velasco-Gonzalez C, Iwuchukwu I. Anti-inflammatory genes in PBMCs post-spontaneous intracerebral hemorrhage. Transl Neurosci 2021; 12:58-66. [PMID: 33564466 PMCID: PMC7844114 DOI: 10.1515/tnsci-2021-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 11/13/2020] [Accepted: 11/23/2020] [Indexed: 11/21/2022] Open
Abstract
Background Neuroinflammation is important in the pathophysiology of spontaneous intracerebral hemorrhage (ICH) and peripheral inflammatory cells play a role in the clinical evolution and outcome. Methodology Blood samples from ICH patients (n = 20) were collected at admission for 5 consecutive days for peripheral blood mononuclear cells (PBMCs). Frozen PBMCs were used for real-time PCR using Taqman probes (NFKB1, SOD1, PPARG, IL10, NFE2L2, and REL) and normalized to GAPDH. Data on hospital length of stay and modified Rankin score (MRS) were collected with 90-day MRS ≤ 3 as favorable outcome. Statistical analysis of clinical characteristics to temporal gene expression from early to delayed timepoints was compared for MRS groups (favorable vs unfavorable) and hematoma volume. Principle findings and results IL10, SOD1, and REL expression were significantly higher at delayed timepoints in PBMCs of ICH patients with favorable outcome. PPARG and REL increased between timepoints in patients with favorable outcome. NFKB1 expression was not sustained, but significantly decreased from higher levels at early onset in patients with unfavorable outcome. IL10 expression showed a negative correlation in patients with high hematoma volume (>30 mL). Conclusions and significance Anti-inflammatory, pro-survival regulators were highly expressed at delayed time points in ICH patients with a favorable outcome, and IL10 expression showed a negative correlation to high hematoma volume.
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Affiliation(s)
- Doan Nguyen
- Institute for Translational Research, Ochsner Medical Center, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America
| | - Vi Tran
- Institute for Translational Research, Ochsner Medical Center, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America
| | - Alireza Shirazian
- Institute for Translational Research, Ochsner Medical Center, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America
| | - Cruz Velasco-Gonzalez
- Center for Outcomes and Health Services Research, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America
| | - Ifeanyi Iwuchukwu
- Institute for Translational Research, Ochsner Medical Center, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America.,Neurocritical Care and Neurology, University of Queensland, Ochsner Clinical School, Ochsner Medical Center, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA 70121, United States of America.,Neuroscience Center of Excellence, Louisiana State University Health New Orleans, School of Medicine, 2020 Gravier Street, 8th Floor, New Orleans, LA 70112, United States of America.,Department of Neurosurgery, Louisiana State University Health New Orleans, School of Medicine, 2020 Gravier Street, 7th Floor, New Orleans, LA 70112, United States of America
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Molecular Correlates of Hemorrhage and Edema Volumes Following Human Intracerebral Hemorrhage Implicate Inflammation, Autophagy, mRNA Splicing, and T Cell Receptor Signaling. Transl Stroke Res 2020; 12:754-777. [PMID: 33206327 PMCID: PMC8421315 DOI: 10.1007/s12975-020-00869-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/02/2020] [Accepted: 10/18/2020] [Indexed: 12/16/2022]
Abstract
Intracerebral hemorrhage (ICH) and perihematomal edema (PHE) volumes are major determinants of ICH outcomes as is the immune system which plays a significant role in damage and repair. Thus, we performed whole-transcriptome analyses of 18 ICH patients to delineate peripheral blood genes and networks associated with ICH volume, absolute perihematomal edema (aPHE) volume, and relative PHE (aPHE/ICH; rPHE). We found 440, 266, and 391 genes correlated with ICH and aPHE volumes and rPHE, respectively (p < 0.005, partial-correlation > |0.6|). These mainly represented inflammatory pathways including NF-κB, TREM1, and Neuroinflammation Signaling-most activated with larger volumes. Weighted Gene Co-Expression Network Analysis identified seven modules significantly correlated with these measures (p < 0.05). Most modules were enriched in neutrophil, monocyte, erythroblast, and/or T cell-specific genes. Autophagy, apoptosis, HIF-1α, inflammatory and neuroinflammatory response (including Toll-like receptors), cell adhesion (including MMP9), platelet activation, T cell receptor signaling, and mRNA splicing were represented in these modules (FDR p < 0.05). Module hub genes, potential master regulators, were enriched in neutrophil-specific genes in three modules. Hub genes included NCF2, NCF4, STX3, and CSF3R, and involved immune response, autophagy, and neutrophil chemotaxis. One module that correlated negatively with ICH volume correlated positively with rPHE. Its genes and hubs were enriched in T cell-specific genes including hubs LCK and ITK, Src family tyrosine kinases whose modulation improved outcomes and reduced BBB dysfunction following experimental ICH. This study uncovers molecular underpinnings associated with ICH and PHE volumes and pathophysiology in human ICH, where knowledge is scarce. The identified pathways and hub genes may represent novel therapeutic targets.
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33
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Chen W, Guo C, Huang S, Jia Z, Wang J, Zhong J, Ge H, Yuan J, Chen T, Liu X, Hu R, Yin Y, Feng H. MitoQ attenuates brain damage by polarizing microglia towards the M2 phenotype through inhibition of the NLRP3 inflammasome after ICH. Pharmacol Res 2020; 161:105122. [DOI: 10.1016/j.phrs.2020.105122] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/15/2020] [Accepted: 07/30/2020] [Indexed: 12/23/2022]
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Geronikolou S, Leontitsis A, Petropoulos V, Davos C, Cokkinos D, Chrousos G. Cyclic stroke mortality variations follow sunspot patterns. F1000Res 2020; 9:1088. [PMID: 33224479 PMCID: PMC7667520 DOI: 10.12688/f1000research.24794.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/02/2020] [Indexed: 11/26/2022] Open
Abstract
Background: Mapping time-structures is a burgeoning scientific field enriching the (P4) medicine models. Local evidence in Mediterranean populations is underinvestigated. Methods: The Censused stroke-related death events (D) in the largest East-Mediterranean port (Piraeus), during (1985-1989), when local population had diet (low fat/sugar, proteins and vegetables/fruits daily, and pure olive oil almost exclusively) and genetic homogeneity-later interrupted by the immigration into Greece in 1990; and Sunspot numbers were indexed by Wolf numbers (Rz) (1944-2004), and evaluated using Fast Fourier Analysis and Singular Spectrum Analysis in MATLAB. Results: D were turned with fluctuations >35% in Rz. A non-anthropogenic 6.8 days cycle was recognized. Conclusions: This study may be taken into consideration in future public health planning and chronotherapy evaluations.
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Affiliation(s)
- Stella Geronikolou
- Clinical, Translational and Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, Athens, 11527, Greece
| | | | - Vasilis Petropoulos
- Research Center for Astronomy and Applied Mathematics, Academy of Athens, Athens, 11527, Greece
| | - Constantinos Davos
- Clinical, Translational and Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, Athens, 11527, Greece
| | - Dennis Cokkinos
- Clinical, Translational and Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, Athens, 11527, Greece
| | - George Chrousos
- University Research Institute of Maternal and Child Health and Precision Medicine, UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Thivon and Levadeias, Athens, 11527, Greece
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Monascin exhibits neuroprotective effects in rotenone model of Parkinson's disease via antioxidation and anti-neuroinflammation. Neuroreport 2020; 31:637-643. [PMID: 32427711 DOI: 10.1097/wnr.0000000000001467] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Increasing evidence verified that oxidative stress and neuroinflammatory response exacerbates motor deficits and increases neuronal loss in several rodent models of Parkinson's disease. In the present study, we explore the neuroprotective effects of monascin in a rotenone-induced Parkinson's disease model as well as the underlying mechanisms. Our results showed that monascin remarkedly attenuated behavioral impairments and the depletion of dopaminergic neurons induced by rotenone in the rats. Besides, monascin decreased the levels of pro-inflammatory factors such as interleukin-1β, interleukin-6, tumor necrosis factor-α and oxidative stress marker malondialdehyde while promoted the expression of superoxide dismutase, glutathione peroxidase and other antioxidant factors. Further detection of the expression of related proteins showed that monascin significantly promoted the expression of proliferator-activated receptor-gamma, F-E2-related factor 2 and heme oxygenase-1, but inhibited the expression of NF-κB. What's more, levels of growth factors that are essential for neuronal and synaptic function were increased under the effects of monascin. All in all, our results revealed that monascin exerted neuroprotective effects in rotenone model of Parkinson's disease via antioxidation and anti-neuroinflammation.
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36
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Hang H, Wang L, Wu G, Ren S. Up-regulation of PPARγ, Nrf2 and HO-1 in microglia activated by thrombin. BRAIN HEMORRHAGES 2020. [DOI: 10.1016/j.hest.2020.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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37
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Xie Z, Zhao J, Wang H, Jiang Y, Yang Q, Fu Y, Zeng H, Hölscher C, Xu J, Zhang Z. Magnolol alleviates Alzheimer's disease-like pathology in transgenic C. elegans by promoting microglia phagocytosis and the degradation of beta-amyloid through activation of PPAR-γ. Biomed Pharmacother 2020; 124:109886. [PMID: 32000045 DOI: 10.1016/j.biopha.2020.109886] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 12/25/2019] [Accepted: 12/29/2019] [Indexed: 12/28/2022] Open
Abstract
This study aims to investigate whether magnolol (MG), a natural neolignane compound, can prevent AD induced by beta-amyloid (Aβ) and the possible mechanisms involved. MG dose-dependently reduces Aβ deposition, toxicity and memory impairment caused by Aβ in transgenic C. elegans. More importantly, these effects are reversed by GW9662, a selective peroxisome proliferator-activated receptor-γ (PPAR-γ) antagonist. MG is more effective in enhancing PPAR-γ luciferase levels than honokiol (HK). Meanwhile, MG has the potential to bind with the ligand binding domain of PPAR-γ (PPAR-γ-LBD). As expected, MG inhibited the luciferase activity of NF-κB and its target genes of inflammatory cytokines, and this effect was blocked by GW9662. The luciferase activity of Nrf2-ARE expression can be activated by MG and decreased Aβ-induced reactive oxygen species (ROS). The target gene LXR of PPAR-γ is activated by MG, which upregulates ApoE and promotes microglia phagocytosis and the degradation of Aβ, and these effects were also reversed by GW9662. In summary, MG can attenuate Aβ-induced AD and the underlying mechanism is the reduction of inflammation and promotion of phagocytosis and degradation of Aβ, which is dependent on PPAR-γ.
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Affiliation(s)
- Zhishen Xie
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Jianping Zhao
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Hui Wang
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Yali Jiang
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Qiaoling Yang
- Department of Pharmacy, Children's Hospital of Shanghai, Children's Hospital Affiliate to Shanghai Jiao Tong University, Shanghai 200040, China
| | - Yu Fu
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Huahui Zeng
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Christian Hölscher
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Jiangyan Xu
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China.
| | - Zhenqiang Zhang
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China.
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38
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Wang R, Liu Y, Ye Q, Hassan SH, Zhao J, Li S, Hu X, Leak RK, Rocha M, Wechsler LR, Chen J, Shi Y. RNA sequencing reveals novel macrophage transcriptome favoring neurovascular plasticity after ischemic stroke. J Cereb Blood Flow Metab 2020; 40:720-738. [PMID: 31722596 PMCID: PMC7168800 DOI: 10.1177/0271678x19888630] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/15/2019] [Accepted: 10/16/2019] [Indexed: 12/21/2022]
Abstract
Blood monocytes/macrophages infiltrate the brain after ischemic stroke and critically influence brain injury and regeneration. We investigated stroke-induced transcriptomic changes of monocytes/macrophages by RNA sequencing profiling, using a mouse model of permanent focal cerebral ischemia. Compared to non-ischemic conditions, brain ischemia induced only moderate genomic changes in blood monocytes, but triggered robust genomic reprogramming in monocytes/macrophages invading the brain. Surprisingly, functional enrichment analysis of the transcriptome of brain macrophages revealed significant overrepresentation of biological processes linked to neurovascular remodeling, such as angiogenesis and axonal regeneration, as early as five days after stroke, suggesting a previously underappreciated role for macrophages in initiating post-stroke brain repair. Upstream Regulator analysis predicted peroxisome proliferator-activated receptor gamma (PPARγ) as a master regulator driving the transcriptional reprogramming in post-stroke brain macrophages. Importantly, myeloid cell-specific PPARγ knockout (mKO) mice demonstrated lower post-stroke angiogenesis and neurogenesis than wild-type mice, which correlated significantly with the exacerbation of post-stroke neurological deficits in mKO mice. Collectively, our findings reveal a novel repair-enhancing transcriptome in brain macrophages during post-stroke neurovascular remodeling. As a master switch controlling genomic reprogramming, PPARγ is a rational therapeutic target for promoting and maintaining beneficial macrophage functions, facilitating neurorestoration, and improving long-term functional recovery after ischemic stroke.
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Affiliation(s)
- Rongrong Wang
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yaan Liu
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Qing Ye
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Sulaiman H Hassan
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Jingyan Zhao
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sicheng Li
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Xiaoming Hu
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Rehana K Leak
- Graduate School of Pharmaceutical Sciences, School of Pharmacy, Duquesne University, Pittsburgh, PA, USA
| | - Marcelo Rocha
- Department of Neurology, UPMC Stroke Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Lawrence R Wechsler
- Department of Neurology, UPMC Stroke Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jun Chen
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Yejie Shi
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
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Tschoe C, Bushnell CD, Duncan PW, Alexander-Miller MA, Wolfe SQ. Neuroinflammation after Intracerebral Hemorrhage and Potential Therapeutic Targets. J Stroke 2020; 22:29-46. [PMID: 32027790 PMCID: PMC7005353 DOI: 10.5853/jos.2019.02236] [Citation(s) in RCA: 223] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/18/2019] [Indexed: 12/20/2022] Open
Abstract
Spontaneous intracerebral hemorrhage (ICH) is a catastrophic illness causing significant morbidity and mortality. Despite advances in surgical technique addressing primary brain injury caused by ICH, little progress has been made treating the subsequent inflammatory cascade. Pre-clinical studies have made advancements identifying components of neuroinflammation, including microglia, astrocytes, and T lymphocytes. After cerebral insult, inflammation is initially driven by the M1 microglia, secreting cytokines (e.g., interleukin-1β [IL-1β] and tumor necrosis factor-α) that are involved in the breakdown of the extracellular matrix, cellular integrity, and the blood brain barrier. Additionally, inflammatory factors recruit and induce differentiation of A1 reactive astrocytes and T helper 1 (Th1) cells, which contribute to the secretion of inflammatory cytokines, augmenting M1 polarization and potentiating inflammation. Within 7 days of ICH ictus, the M1 phenotype coverts to a M2 phenotype, key for hematoma removal, tissue healing, and overall resolution of inflammation. The secretion of anti-inflammatory cytokines (e.g., IL-4, IL-10) can drive Th2 cell differentiation. M2 polarization is maintained by the secretion of additional anti-inflammatory cytokines by the Th2 cells, suppressing M1 and Th1 phenotypes. Elucidating the timing and trigger of the anti-inflammatory phenotype may be integral in improving clinical outcomes. A challenge in current translational research is the absence of an equivalent disease animal model mirroring the patient population and comorbid pathophysiologic state. We review existing data and describe potential therapeutic targets around which we are creating a bench to bedside translational research model that better reflects the pathophysiology of ICH patients.
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Affiliation(s)
- Christine Tschoe
- Department of Neurological Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Cheryl D Bushnell
- Department of Neurology, Wake Forest Baptist Health, Winston-Salem, NC, USA
| | - Pamela W Duncan
- Department of Neurology, Wake Forest Baptist Health, Winston-Salem, NC, USA.,Department of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | | | - Stacey Q Wolfe
- Department of Neurological Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
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40
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The Mitochondria-Derived Peptide Humanin Improves Recovery from Intracerebral Hemorrhage: Implication of Mitochondria Transfer and Microglia Phenotype Change. J Neurosci 2020; 40:2154-2165. [PMID: 31980585 DOI: 10.1523/jneurosci.2212-19.2020] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/07/2020] [Accepted: 01/11/2020] [Indexed: 01/16/2023] Open
Abstract
Astrocytes are an integral component of the neurovascular unit where they act as homeostatic regulators, especially after brain injuries, such as stroke. One process by which astrocytes modulate homeostasis is the release of functional mitochondria (Mt) that are taken up by other cells to improve their function. However, the mechanisms underlying the beneficial effect of Mt transfer are unclear and likely multifactorial. Using a cell culture system, we established that astrocytes release both intact Mt and humanin (HN), a small bioactive peptide normally transcribed from the Mt genome. Further experiments revealed that astrocyte-secreted Mt enter microglia, where they induce HN expression. Similar to the effect of HN alone, incorporation of Mt by microglia (1) upregulated expression of the transcription factor peroxisome proliferator-activated receptor gamma and its target genes (including mitochondrial superoxide dismutase), (2) enhanced phagocytic activity toward red blood cells (an in vitro model of hematoma clearance after intracerebral hemorrhage [ICH]), and (3) reduced proinflammatory responses. ICH induction in male mice caused profound HN loss in the affected hemisphere. Intravenously administered HN penetrated perihematoma brain tissue, reduced neurological deficits, and improved hematoma clearance, a function that normally requires microglia/macrophages. This study suggests that astrocytic Mt-derived HN could act as a beneficial secretory factor, including when transported within Mt to microglia, where it promotes a phagocytic/reparative phenotype. These findings also indicate that restoring HN levels in the injured brain could represent a translational target for ICH. These favorable biological responses to HN warrant studies on HN as therapeutic target for ICH.SIGNIFICANCE STATEMENT Astrocytes are critical for maintaining brain homeostasis. Here, we demonstrate that astrocytes secrete mitochondria (Mt) and the Mt-genome-encoded, small bioactive peptide humanin (HN). Mt incorporate into microglia, and both Mt and HN promote a "reparative" microglia phenotype characterized by enhanced phagocytosis and reduced proinflammatory responses. Treatment with HN improved outcomes in an animal model of intracerebral hemorrhage, suggesting that this process could have biological relevance to stroke pathogenesis.
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41
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Ting SM, Zhao X, Sun G, Obertas L, Ricote M, Aronowski J. Brain Cleanup as a Potential Target for Poststroke Recovery: The Role of RXR (Retinoic X Receptor) in Phagocytes. Stroke 2020; 51:958-966. [PMID: 31914884 DOI: 10.1161/strokeaha.119.027315] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose- Phagocytic cells, such as microglia and blood-derived macrophages, are a key biological modality responsible for phagocytosis-mediated clearance of damaged, dead, or displaced cells that are compromised during senescence or pathological processes, including after stroke. This process of clearance is essential to eliminate the source of inflammation and to allow for optimal brain repair and functional recovery. Transcription factor, RXR (retinoic-X-receptor) is strongly implicated in phagocytic functions regulation, and as such could represent a novel target for brain recovery after stroke. Methods- Primary cultured microglia and bone marrow macrophages were used for phagocytic study. Mice with deleted RXR-α in myeloid phagocytes (Mac-RXR-α-/-) were subjected to transient middle cerebral artery occlusion to mimic ischemic stroke and then treated with RXR agonist bexarotene. RNA-sequencing and long-term recovery were evaluated. Results- Using cultured microglia, we demonstrated that the RXR-α promotes the phagocytic functions of microglia toward apoptotic neurons. Using mice with deleted RXR-α in myeloid phagocytes (Mac-RXR-α-/-), we have shown that despite behaving similarly to the control at early time points (up to 3 days, damage established histologically and behaviorally), these Mac-RXR-α-/- mice demonstrated worsened late functional recovery and developed brain atrophy that was larger in size than that seen in control mice. The RXR-α deficiency was associated with reduced expression of genes known to be under control of the prominent transcriptional RXR partner, PPAR (peroxisome proliferator-activated receptor)-γ, as well as genes encoding for scavenger receptors and genes that signify microglia/macrophages polarization to a reparative phenotype. Finally, we demonstrated that the RXR agonist, bexarotene, administered as late as 1 day after middle cerebral artery occlusion, improved neurological recovery, and reduced the atrophy volume as assessed 28 days after stroke. Bexarotene did not improve outcome in Mac-RXR-α-/- mice. Conclusions- Altogether, these data suggest that phagocytic cells control poststroke recovery and that RXR in these cells represents an attractive target with exceptionally long therapeutic window.
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Affiliation(s)
- Shun-Ming Ting
- From the Department of Neurology, University of Texas HSC, McGovern Medical School, Houston (S.-M.T., X.Z., G.S., L.O., J.A.)
| | - Xiurong Zhao
- From the Department of Neurology, University of Texas HSC, McGovern Medical School, Houston (S.-M.T., X.Z., G.S., L.O., J.A.)
| | - Guanghua Sun
- From the Department of Neurology, University of Texas HSC, McGovern Medical School, Houston (S.-M.T., X.Z., G.S., L.O., J.A.)
| | - Lidiya Obertas
- From the Department of Neurology, University of Texas HSC, McGovern Medical School, Houston (S.-M.T., X.Z., G.S., L.O., J.A.)
| | - Mercedes Ricote
- Area of Myocardial Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid, Spain (M.R.)
| | - Jaroslaw Aronowski
- From the Department of Neurology, University of Texas HSC, McGovern Medical School, Houston (S.-M.T., X.Z., G.S., L.O., J.A.)
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Inhibiting nuclear factor-κB at different stages after intracerebral hemorrhage can influence the hemorrhage-induced brain injury in experimental models in vivo. Brain Res Bull 2019; 155:159-165. [PMID: 31857135 DOI: 10.1016/j.brainresbull.2019.12.010] [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: 08/15/2019] [Revised: 11/27/2019] [Accepted: 12/13/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Nuclear factor-κB (NF-κB) is a critical regulator of inflammatory responses after ICH, and different subunits may have different influences on the cell death and prognosis. The aim of the present study is to clarify whether the prognosis can be influenced by inhibiting NF-κB activation and subunits expression using PDTC at different stages after ICH. METHODS Rats were divided into sham group, ICH group, early interference group and late interference group. At preset time points after ICH, the ipsilateral striatum and tissue around was obtained for detection of NF-κB activation, cell death, and expression of caspase-3, bcl-2, and NF-κB subunits, to evaluate of the effect of PDTC. RESULTS NF-κB subunit p65 mainly expressed at the early stage after ICH, and c-Rel at the late stage. NF-κB activation can be inhibited at the early stage after ICH by administrating PDTC at 10 min, 1d and 2d after ICH, and at the late stage at 6d,7d and 8d. NF-κB activation inhibition at the early stage was due to p65, and c-Rel at the late stage. Inhibiting p65 expression at the early stage after ICH can reduce the apoptotic factor caspase-3 expression and cell death, and raise the antiapoptotic factor bcl-2. Meanwhile, inhibiting c-Rel expression at the late stage after ICH can lead to the opposite result. CONCLUSION Measures of inhibiting NF-κB subunits can be performed to influence the secondary brain damage and prognosis of ICH. We can also speculate that early inhibition of p65 expression and late promotion of c-Rel expression may be a more efficient method to improve the prognosis of ICH.
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Chang CF, Massey J, Osherov A, Angenendt da Costa LH, Sansing LH. Bexarotene Enhances Macrophage Erythrophagocytosis and Hematoma Clearance in Experimental Intracerebral Hemorrhage. Stroke 2019; 51:612-618. [PMID: 31826730 DOI: 10.1161/strokeaha.119.027037] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background and Purpose- Enhancement of erythrophagocytosis by macrophages in a timely manner can limit the toxic effects of erythrocyte metabolites and promote brain recovery after intracerebral hemorrhage (ICH). In the current study, we investigated the therapeutic effect of retinoid X receptor agonist, bexarotene, in facilitating erythrophagocytosis and neurobehavioral recovery in 2 mouse models of ICH. Methods- Bone marrow-derived macrophages and fluorescently labeled erythrocytes were used to study erythrophagocytosis in vitro with phenotypic changes quantified by gene expression. ICH was modeled in vivo using intrastriatal autologous blood and collagenase injection in mice with and without bexarotene treatment beginning 3 hours after ICH. In vivo phagocytosis, ability and hematoma clearance were evaluated by erythrophagocytosis assays, flow cytometry, and histological analysis. Neurological deficits and functional recovery were also quantified. Results- Bexarotene increased macrophage expression of phagocytosis receptors and erythrophagocytosis and reduced macrophage TNF (tumor necrosis factor) production in vitro. In vivo, bexarotene treatment enhanced erythrophagocytosis, reduced hematoma volume, and ultimately improved neurological recovery after ICH in 2 distinct models of ICH. Conclusions- Bexarotene administration is beneficial for recovery after ICH by enhancing hemorrhage phagocytosis, modulating macrophage phenotype, and improving functional recovery.
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Affiliation(s)
- Che-Feng Chang
- From the Graduate Institute of Physiology, College of Medicine, National Taiwan University, Taipei (C.-F.C.).,Department of Neurology, Yale University School of Medicine, New Haven, CT (C.-F.C., J.M., A.O., L.H.S.)
| | - Jordan Massey
- Department of Neurology, Yale University School of Medicine, New Haven, CT (C.-F.C., J.M., A.O., L.H.S.)
| | - Artem Osherov
- Department of Neurology, Yale University School of Medicine, New Haven, CT (C.-F.C., J.M., A.O., L.H.S.)
| | - Luís Henrique Angenendt da Costa
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Brazil (L.H.A.d.C.)
| | - Lauren H Sansing
- Department of Neurology, Yale University School of Medicine, New Haven, CT (C.-F.C., J.M., A.O., L.H.S.)
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Lee YY, Park JS, Leem YH, Park JE, Kim DY, Choi YH, Park EM, Kang JL, Kim HS. The phosphodiesterase 10 inhibitor papaverine exerts anti-inflammatory and neuroprotective effects via the PKA signaling pathway in neuroinflammation and Parkinson's disease mouse models. J Neuroinflammation 2019; 16:246. [PMID: 31791357 PMCID: PMC6888927 DOI: 10.1186/s12974-019-1649-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 11/19/2019] [Indexed: 02/07/2023] Open
Abstract
Background Neuroinflammation plays a pivotal role in the pathogenesis of Parkinson’s disease (PD). Thus, the development of agents that can control neuroinflammation has been suggested as a promising therapeutic strategy for PD. In the present study, we investigated whether the phosphodiesterase (PDE) 10 inhibitor has anti-inflammatory and neuroprotective effects in neuroinflammation and PD mouse models. Methods Papaverine (PAP) was utilized as a selective inhibitor of PDE10. The effects of PAP on the expression of pro-inflammatory molecules were examined in lipopolysaccharide (LPS)–stimulated BV2 microglial cells by ELISA, RT-PCR, and Western blot analysis. The effects of PAP on transcription factors were analyzed by the electrophoretic mobility shift assay, the reporter gene assay, and Western blot analysis. Microglial activation and the expression of proinflammatory molecules were measured in the LPS- or MPTP-injected mouse brains by immunohistochemistry and RT-PCR analysis. The effect of PAP on dopaminergic neuronal cell death and neurotrophic factors were determined by immunohistochemistry and Western blot analysis. To assess mouse locomotor activity, rotarod and pole tests were performed in MPTP-injected mice. Results PAP inhibited the production of nitric oxide and proinflammatory cytokines in LPS-stimulated microglia by modulating various inflammatory signals. In addition, PAP elevated intracellular cAMP levels and CREB phosphorylation. Treatment with H89, a PKA inhibitor, reversed the anti-inflammatory effects of PAP, suggesting the critical role of PKA signaling in the anti-inflammatory effects of PAP. We verified the anti-inflammatory effects of PAP in the brains of mice with LPS-induced systemic inflammation. PAP suppressed microglial activation and proinflammatory gene expression in the brains of these mice, and these effects were reversed by H89 treatment. We further examined the effects of PAP on MPTP-injected PD model mice. MPTP-induced dopaminergic neuronal cell death and impaired locomotor activity were recovered by PAP. In addition, PAP suppressed microglial activation and proinflammatory mediators in the brains of MPTP-injected mice. Conclusions PAP has strong anti-inflammatory and neuroprotective effects and thus may be a potential candidate for treating neuroinflammatory disorders such as PD.
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Affiliation(s)
- Yu-Young Lee
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea
| | - Jin-Sun Park
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea
| | - Yea-Hyun Leem
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea
| | - Jung-Eun Park
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea
| | - Do-Yeon Kim
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea
| | - Youn-Hee Choi
- Department of Physiology and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Seoul, South Korea
| | - Eun-Mi Park
- Department of Pharmacology and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Seoul, South Korea.,Department of Brain & Cognitive Sciences, Ewha Womans University, Seoul, South Korea
| | - Jihee Lee Kang
- Department of Physiology and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Seoul, South Korea
| | - Hee-Sun Kim
- Department of Molecular Medicine and Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, 808-1 Magok-dong, Gangseo-gu, Seoul, 07804, South Korea. .,Department of Brain & Cognitive Sciences, Ewha Womans University, Seoul, South Korea.
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Zakaria A, Rady M, Mahran L, Abou-Aisha K. Pioglitazone Attenuates Lipopolysaccharide-Induced Oxidative Stress, Dopaminergic Neuronal Loss and Neurobehavioral Impairment by Activating Nrf2/ARE/HO-1. Neurochem Res 2019; 44:10.1007/s11064-019-02907-0. [PMID: 31713708 DOI: 10.1007/s11064-019-02907-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 11/03/2019] [Accepted: 11/06/2019] [Indexed: 12/11/2022]
Abstract
The aim of the present study was to examine the neuroprotective potential of pioglitazone via activation of Nrf2/ARE-dependent HO-1 signaling pathway in chronic neuroinflammation and progressive neurodegeneration mouse model induced by lipopolysaccharide (LPS). After assessing spatial memory, anxiety and motor-coordination, TH+ neurons in substantia nigra (SN) were counted. The oxidative stress marker carbonyl protein levels and HO-1 enzyme activity were also evaluated. RT-qPCR was conducted to detect HO-1, Nrf2 and NF-κp65 mRNA expression levels and Nrf2 transcriptional activation of antioxidant response element (ARE) of HO-1 was investigated. Pioglitazone ameliorated LPS-induced dopaminergic neuronal loss, as well as mitigated neurobehavioral impairments. It enhanced Nrf2 mRNA expression, and augmented Nrf2/ARE-dependent HO-1 pathway activation by amplifying HO-1 mRNA expression. Moreover, it induced a significant decrease in NF-κB p65 mRNA expression, while reducing carbonyl protein levels and restoring the HO-1 enzyme activity. Interestingly, LPS induced Nrf2/antioxidant response element (ARE) of HO-1 activation, ultimately resulting in slight enhanced HO-1 mRNA expression. However, LPS elicited decrease in HO-1 enzyme activity. Zinc protoporphyrin-IX (ZnPPIX) administrated with pioglitazone abolished its effects in the LPS mouse model. The study results demonstrate that coordinated activation of Nrf2/ARE-dependent HO-1 pathway defense mechanism by the PPARγ agonist pioglitazone mediated its neuroprotective effects.
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Affiliation(s)
- Aya Zakaria
- Department of Pharmacology and Toxicology, German University in Cairo (GUC), New Cairo, Egypt.
| | - Mona Rady
- Department of Microbiology and Immunology, German University in Cairo (GUC), New Cairo, Egypt
| | - Laila Mahran
- Department of Pharmacology and Toxicology, German University in Cairo (GUC), New Cairo, Egypt
| | - Khaled Abou-Aisha
- Department of Microbiology and Immunology, German University in Cairo (GUC), New Cairo, Egypt.
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46
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Zhang W, Zhao J, Wang R, Jiang M, Ye Q, Smith AD, Chen J, Shi Y. Macrophages reprogram after ischemic stroke and promote efferocytosis and inflammation resolution in the mouse brain. CNS Neurosci Ther 2019; 25:1329-1342. [PMID: 31697040 PMCID: PMC6887920 DOI: 10.1111/cns.13256] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/20/2019] [Accepted: 10/21/2019] [Indexed: 12/27/2022] Open
Abstract
AIMS Blood-borne monocytes/macrophages infiltrate the brain in massive numbers after ischemic stroke, but their impact on poststroke brain injury and recovery remains elusive. This study examined the transcriptomic changes in monocytes/macrophages after ischemic stroke and the functional implications of these changes, particularly with regards to the contribution of these cells to the phagocytic clearance of dead/dying cells (efferocytosis) in the poststroke brain. METHODS We performed whole-genome RNA sequencing on the monocyte/macrophage population sorted from mouse brain and peripheral blood 5 days after permanent focal cerebral ischemia. In addition, the spatial and temporal profiles of macrophage efferocytosis were examined in vivo by immunohistochemistry 3-7 days after brain ischemia. RESULTS Robust transcriptomic changes occurred in monocytes/macrophages upon infiltrating the poststroke brain. Functional enrichment analysis revealed a transcriptome of brain macrophages that strongly favored efferocytic activity. A large number of efferocytosis-related genes were upregulated in brain macrophages, the products of which are essential components involved in various steps of efferocytosis, such as chemotaxis, recognition of dead cells, engulfment, and processing of phagosomes. The efferocytic activity of brain macrophages were verified by immunohistochemistry, wherein Iba1-labeled microglia/macrophages effectively cleared apoptotic neurons in the infarct during the subacute stage after brain ischemia. We also identified PPARγ and STAT6 as potential upstream regulators that shaped this proefferocytic and inflammation-resolving transcriptome of macrophages in the poststroke brain. CONCLUSION Macrophages play a crucial role in the phagocytic clearance of dead neurons after ischemic stroke and promote the resolution of inflammation in the brain. Molecular therapies that enhance macrophage efferocytic capability may be promising treatments for ischemic stroke by facilitating inflammation resolution, brain repair, and recovery of neurological functions.
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Affiliation(s)
- Wenting Zhang
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jingyan Zhao
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Rongrong Wang
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ming Jiang
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Qing Ye
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA.,Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Amanda D Smith
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA.,Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Jun Chen
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA.,Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Yejie Shi
- Department of Neurology, Pittsburgh Institute of Brain Disorders & Recovery, University of Pittsburgh, Pittsburgh, PA, USA.,Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
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Effects of Docosahexaenoic Acid and Its Peroxidation Product on Amyloid-β Peptide-Stimulated Microglia. Mol Neurobiol 2019; 57:1085-1098. [PMID: 31677009 DOI: 10.1007/s12035-019-01805-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/26/2019] [Indexed: 12/13/2022]
Abstract
Growing evidence suggests that docosahexaenoic acid (DHA) exerts neuroprotective effects, although the mechanism(s) underlying these beneficial effects are not fully understood. Here we demonstrate that DHA, but not arachidonic acid (ARA), suppressed oligomeric amyloid-β peptide (oAβ)-induced reactive oxygen species (ROS) production in primary mouse microglia and immortalized mouse microglia (BV2). Similarly, DHA but not ARA suppressed oAβ-induced increases in phosphorylated cytosolic phospholipase A2 (p-cPLA2), inducible nitric oxide synthase (iNOS), and tumor necrosis factor-α (TNF-α) in BV2 cells. LC-MS/MS assay indicated the ability for DHA to cause an increase in 4-hydroxyhexenal (4-HHE) and suppress oAβ-induced increase in 4-hydroxynonenal (4-HNE). Although oAβ did not alter the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway, exogenous DHA, ARA as well as low concentrations of 4-HHE and 4-HNE upregulated this pathway and increased production of heme oxygenase-1 (HO-1) in microglial cells. These results suggest that DHA modulates ARA metabolism in oAβ-stimulated microglia through suppressing oxidative and inflammatory pathways and upregulating the antioxidative stress pathway involving Nrf2/HO-1. Understanding the mechanism(s) underlying the beneficial effects of DHA on microglia should shed light into nutraceutical therapy for the prevention and treatment of Alzheimer's disease (AD).
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Cai W, Dai X, Chen J, Zhao J, Xu M, Zhang L, Yang B, Zhang W, Rocha M, Nakao T, Kofler J, Shi Y, Stetler RA, Hu X, Chen J. STAT6/Arg1 promotes microglia/macrophage efferocytosis and inflammation resolution in stroke mice. JCI Insight 2019; 4:131355. [PMID: 31619589 PMCID: PMC6824303 DOI: 10.1172/jci.insight.131355] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/11/2019] [Indexed: 02/06/2023] Open
Abstract
Efferocytosis, or phagocytic clearance of dead/dying cells by brain-resident microglia and/or infiltrating macrophages, is instrumental for inflammation resolution and restoration of brain homeostasis after stroke. Here, we identify the signal transducer and activator of transcription 6/arginase1 (STAT6/Arg1) signaling axis as a potentially novel mechanism that orchestrates microglia/macrophage responses in the ischemic brain. Activation of STAT6 was observed in microglia/macrophages in the ischemic territory in a mouse model of stroke and in stroke patients. STAT6 deficiency resulted in reduced clearance of dead/dying neurons, increased inflammatory gene signature in microglia/macrophages, and enlarged infarct volume early after experimental stroke. All of these pathological changes culminated in an increased brain tissue loss and exacerbated long-term functional deficits. Combined in vivo analyses using BM chimeras and in vitro experiments using microglia/macrophage-neuron cocultures confirmed that STAT6 activation in both microglia and macrophages was essential for neuroprotection. Adoptive transfer of WT macrophages into STAT6-KO mice reduced accumulation of dead neurons in the ischemic territory and ameliorated brain infarction. Furthermore, decreased expression of Arg1 in STAT6-/- microglia/macrophages was responsible for impairments in efferocytosis and loss of antiinflammatory modality. Our study suggests that efferocytosis via STAT6/Arg1 modulates microglia/macrophage phenotype, accelerates inflammation resolution, and improves stroke outcomes.
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Affiliation(s)
- Wei Cai
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Xuejiao Dai
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jie Chen
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, Pennsylvania, USA
| | - Jingyan Zhao
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Mingyue Xu
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Lili Zhang
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Boyu Yang
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Wenting Zhang
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Marcelo Rocha
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Toshimasa Nakao
- T.E. Starzl Transplantation Institute and Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Julia Kofler
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Yejie Shi
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, Pennsylvania, USA
| | - R. Anne Stetler
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Xiaoming Hu
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, Pennsylvania, USA
| | - Jun Chen
- Pittsburgh Institute of Brain Disorders and Recovery, and Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, Pennsylvania, USA
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Halstead MR, Geocadin RG. The Medical Management of Cerebral Edema: Past, Present, and Future Therapies. Neurotherapeutics 2019; 16:1133-1148. [PMID: 31512062 PMCID: PMC6985348 DOI: 10.1007/s13311-019-00779-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Cerebral edema is commonly associated with cerebral pathology, and the clinical manifestation is largely related to the underlying lesioned tissue. Brain edema usually amplifies the dysfunction of the lesioned tissue and the burden of cerebral edema correlates with increased morbidity and mortality across diseases. Our modern-day approach to the medical management of cerebral edema has largely revolved around, an increasingly artificial distinction between cytotoxic and vasogenic cerebral edema. These nontargeted interventions such as hyperosmolar agents and sedation have been the mainstay in clinical practice and offer noneloquent solutions to a dire problem. Our current understanding of the underlying molecular mechanisms driving cerebral edema is becoming much more advanced, with differences being identified across diseases and populations. As our understanding of the underlying molecular mechanisms in neuronal injury continues to expand, so too is the list of targeted therapies in the pipeline. Here we present a brief review of the molecular mechanisms driving cerebral edema and a current overview of our understanding of the molecular targets being investigated.
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Affiliation(s)
- Michael R Halstead
- Neurosciences Critical Care Division, Departments of Neurology, Anesthesiology-Critical Care Medicine and Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21287, USA.
| | - Romergryko G Geocadin
- Neurosciences Critical Care Division, Departments of Neurology, Anesthesiology-Critical Care Medicine and Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21287, USA
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50
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Shao Z, Tu S, Shao A. Pathophysiological Mechanisms and Potential Therapeutic Targets in Intracerebral Hemorrhage. Front Pharmacol 2019; 10:1079. [PMID: 31607923 PMCID: PMC6761372 DOI: 10.3389/fphar.2019.01079] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 08/26/2019] [Indexed: 12/12/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is a subtype of hemorrhagic stroke with high mortality and morbidity. The resulting hematoma within brain parenchyma induces a series of adverse events causing primary and secondary brain injury. The mechanism of injury after ICH is very complicated and has not yet been illuminated. This review discusses some key pathophysiology mechanisms in ICH such as oxidative stress (OS), inflammation, iron toxicity, and thrombin formation. The corresponding therapeutic targets and therapeutic strategies are also reviewed.
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Affiliation(s)
- Zhiwei Shao
- Department of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Sheng Tu
- Department of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Anwen Shao
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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