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Xia Y, Zou C, Kang W, Xu T, Shao R, Zeng P, Sun B, Chen J, Qi Y, Wang Z, Lin T, Zhu H, Shen Y, Wang X, Guo S, Cui D. Invasive metastatic tumor-camouflaged ROS responsive nanosystem for targeting therapeutic brain injury after cardiac arrest. Biomaterials 2024; 311:122678. [PMID: 38917705 DOI: 10.1016/j.biomaterials.2024.122678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 05/28/2024] [Accepted: 06/22/2024] [Indexed: 06/27/2024]
Abstract
Drug transmission through the blood-brain barrier (BBB) is considered an arduous challenge for brain injury treatment following the return of spontaneous circulation after cardiac arrest (CA-ROSC). Inspired by the propensity of melanoma metastasis to the brain, B16F10 cell membranes are camouflaged on 2-methoxyestradiol (2ME2)-loaded reactive oxygen species (ROS)-triggered "Padlock" nanoparticles that are constructed by phenylboronic acid pinacol esters conjugated D-a-tocopheryl polyethylene glycol succinate (TPGS-PBAP). The biomimetic nanoparticles (BM@TP/2ME2) can be internalized, mainly mediated by the mutual recognition and interaction between CD44v6 expressed on B16F10 cell membranes and hyaluronic acid on cerebral vascular endothelial cells, and they responsively release 2ME2 by the oxidative stress microenvironment. Notably, BM@TP/2ME2 can scavenge excessive ROS to reestablish redox balance, reverse neuroinflammation, and restore autophagic flux in damaged neurons, eventually exerting a remarkable neuroprotective effect after CA-ROSC in vitro and in vivo. This biomimetic drug delivery system is a novel and promising strategy for the treatment of cerebral ischemia-reperfusion injury after CA-ROSC.
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Affiliation(s)
- Yiyang Xia
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China
| | - Chenming Zou
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Weichao Kang
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China
| | - Tianhua Xu
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China
| | - Rongjiao Shao
- Department of Critical Care Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, PR China
| | - Ping Zeng
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Bixi Sun
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Jie Chen
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China
| | - Yiming Qi
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Zhaozhong Wang
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Tiancheng Lin
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China
| | - Haichao Zhu
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Yuanyuan Shen
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xintao Wang
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China.
| | - Shengrong Guo
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Derong Cui
- Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, PR China.
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Xinliang Z, Achkasov EE, Gavrikov LK, Yuchen L, Zhang C, Dudnik EN, Rumyantseva O, Beeraka NM, Glazachev OS. Assessing the importance and safety of hypoxia conditioning for patients with occupational pulmonary diseases: A recent clinical perspective. Biomed Pharmacother 2024; 178:117275. [PMID: 39126774 DOI: 10.1016/j.biopha.2024.117275] [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: 05/17/2024] [Revised: 07/25/2024] [Accepted: 08/05/2024] [Indexed: 08/12/2024] Open
Abstract
Occupational pulmonary diseases (OPDs) pose a significant global health challenge, contributing to high mortality rates. This review delves into the pathophysiology of hypoxia and the safety of intermittent hypoxic conditioning (IHC) in OPD patients. By examining sources such as PubMed, Relemed, NLM, Scopus, and Google Scholar, the review evaluates the efficacy of IHC in clinical outcomes for OPD patients. It highlights the complexities of cardiovascular and respiratory regulation dysfunctions in OPDs, focusing on respiratory control abnormalities and the impact of intermittent hypoxic exposures. Key areas include the physiological effects of hypoxia, the role of hypoxia-inducible factor-1 alpha (HIF-1α) in occupational lung diseases, and the links between brain ischemia, stroke, and OPDs. The review also explores the interaction between intermittent hypoxic exposures, mitochondrial energetics, and lung physiology. The potential of IHE to improve clinical manifestations and underlying pathophysiology in OPD patients is thoroughly examined. This comprehensive analysis aims to benefit molecular pathologists, pulmonologists, clinicians, and physicians by enhancing understanding of IHE's clinical benefits, from research to patient care, and improving clinical outcomes for OPD patients.
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Affiliation(s)
- Zhang Xinliang
- Chair of Sports Medicine and Rehabilitation, Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia; Co-Chair of Normal Physiology, Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia.
| | - Eugeny E Achkasov
- Chair of Sports Medicine and Rehabilitation, Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia.
| | - Leonid K Gavrikov
- Volgograd State Medical University, 1, Pavshikh Bortsov Sq., Volgograd 400131, Russia.
| | - Li Yuchen
- Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia.
| | - Chen Zhang
- Chair of Epidemiology and Modern Technologies of Vaccination, Institute of Professional Education, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia
| | - Elena N Dudnik
- Co-Chair of Normal Physiology, Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia.
| | - Olga Rumyantseva
- Izmerov Research Institute of Occupational Health, 31 Budeynniy Avenye, Moscow 105275, Russia.
| | - Narasimha M Beeraka
- Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, R4-168, Indianapolis, IN 46202, USA; Department of Human Anatomy and Histology, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia; Raghavendra Institute of Pharmaceutical Education and Research (RIPER), Chiyyedu, Anantapuramu, Andhra Pradesh 515721, India.
| | - Oleg S Glazachev
- Co-Chair of Normal Physiology, Institute of Clinical Medicine, I.M. Sechenov First Moscow State Medical University (Sechenov University), 8/2 Trubetskaya Str., Moscow 119991, Russia.
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Bernis ME, Hakvoort C, Nacarkucuk E, Burkard H, Bremer AS, Zweyer M, Maes E, Grzelak KA, Sabir H. Neuroprotective Effect of Clemastine Improved Oligodendrocyte Proliferation through the MAPK/ERK Pathway in a Neonatal Hypoxia Ischemia Rat Model. Int J Mol Sci 2024; 25:8204. [PMID: 39125778 PMCID: PMC11311837 DOI: 10.3390/ijms25158204] [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: 05/08/2024] [Revised: 07/16/2024] [Accepted: 07/20/2024] [Indexed: 08/12/2024] Open
Abstract
Neonatal hypoxic-ischemic encephalopathy is the most common cause of long-term disability in term neonates, and white matter injury is the primary cause of cerebral palsy. Therapies that focus on the neuroprotection of myelination and oligodendrocyte proliferation could potentially ameliorate long-lasting neurological impairments after hypoxic-ischemic encephalopathy. Clemastine, a histamine H1 antagonist, has been shown to exert neuroprotective effects in multiple sclerosis and spinal cord injury by promoting oligodendrogenesis and re-myelination. In this study, we demonstrated the neuroprotective effects of clemastine in our rat model of neonatal hypoxic-ischemic brain injury. Animals received a single intraperitoneal injection of either vehicle or clemastine (10 mg/kg) for 6 consecutive days. Our results showed a significant reduction in white matter loss after treatment, with a clear effect of clemastine on oligodendrocytes, showing a significant increase in the number of Olig2+ cells. We characterized the MAPK/ERK pathway as a potential mechanistic pathway underlying the neuroprotective effects of clemastine. Altogether, our results demonstrate that clemastine is a potential compound for the treatment of hypoxic-ischemic encephalopathy, with a clear neuroprotective effect on white matter injury by promoting oligodendrogenesis.
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Affiliation(s)
- Maria E. Bernis
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Charlotte Hakvoort
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Efe Nacarkucuk
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Hannah Burkard
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Anna-Sophie Bremer
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Margit Zweyer
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Elke Maes
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Kora A. Grzelak
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
| | - Hemmen Sabir
- Neonatologie und Pädiatrische Intensivmedizin, Eltern-Kind-Zentrum, Universitätsklinikum Bonn, 53127 Bonn, Germany; (M.E.B.); (C.H.); (E.N.); (H.B.); (A.-S.B.); (M.Z.); (E.M.); (K.A.G.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 53127 Bonn, Germany
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Song S, Zhu Z, Zhang K, Xiao M, Gao R, Li Q, Chen X, Mei H, Zeng L, Wei Y, Zhu Y, Nuer Y, Yang L, Li W, Li T, Ju R, Li Y, Jiang L, Chen C, Zhu L. Two risk assessment models for predicting white matter injury in extremely preterm infants. Pediatr Res 2024:10.1038/s41390-024-03402-1. [PMID: 39025934 DOI: 10.1038/s41390-024-03402-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 06/22/2024] [Accepted: 06/27/2024] [Indexed: 07/20/2024]
Abstract
BACKGROUND Extremely preterm infants (EPIs) are at high-risk of white matter injury (WMI), leading to long-term neurodevelopmental impairments. We aimed to develop nomograms for WMI. METHODS The study included patients from 31 provinces, spanning ten years. 6074 patients before 2018 were randomly divided into a training and internal validation group (7:3). The external validation group comprised 1492 patients from 2019. Predictors were identified using the least absolute shrinkage and selection operator (LASSO) and multivariable logistic regression and nomograms were constructed. Models' performance was evaluated using receiver operating characteristic (ROC), decision curve analysis (DCA) and calibration curves. RESULTS The prenatal nomogram included multiple gestation, premature rupture of membranes (PROM), chorioamnionitis, prenatal glucocorticoids, hypertensive disorder complicating pregnancy (HDCP) and Apgar 1 min, with area under the curve (AUC) of 0.805, 0.816 and 0.799 in the training, internal validation and external validation group, respectively. Days of mechanical ventilation (MV), shock, patent ductus arteriosus (PDA) ligation, intraventricular hemorrhage (IVH) grade III-IV, septicemia, hypothermia and necrotizing enterocolitis (NEC) stage II-III were identified as postpartum predictors. The AUCs were 0.791, 0.813 and 0.823 in the three groups, respectively. DCA and calibration curves showed good clinical utility and consistency. CONCLUSION The two nomograms provide clinicians with precise and efficient tools for prediction of WMI. IMPACT This study is a large-sample multicenter study, spanning 10 years. The two nomograms are convenient for identifying high-risk infants early, allowing for reducing poor prognosis.
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Affiliation(s)
- Shuting Song
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Zhicheng Zhu
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Ke Zhang
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Mili Xiao
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Ruiwei Gao
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Qingping Li
- Department of Neonatology, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Xiao Chen
- Department of Neonatology, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Hua Mei
- Department of Neonatology, The Affiliated Hospital Inner Mongolia Medical University, Inner Mongolia, China
| | - Lingkong Zeng
- Department of Neonatology, Wuhan Woman and Children Medical Care Center, Hubei, China
| | - Yi Wei
- Department of Neonatology, Guilin Maternal and Child Health Hospital, Guangxi, China
| | - Yanpin Zhu
- Department of Neonatology, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Ya Nuer
- Department of Neonatology, Xinjiang Uygur Autonomous Region People's Hospital, Xinjiang, China
| | - Ling Yang
- Department of Neonatology, Hainan Women and Children's Medical Center, Hainan, China
| | - Wen Li
- Department of Neonatology, Qilu Hospital of Shandong University, Shandong, China
| | - Ting Li
- Department of Neonatology, Hunan Maternal and Child Health Care Hospital, Hunan, China
| | - Rong Ju
- Department of Neonatology, Chengdu Woman's and Children's Center Hospital, Sichuan, China
| | - Yangfang Li
- Department of Neonatology, Kunming Children's Hospital, Yunnan, China
| | - Lian Jiang
- Department of Neonatology, Fourth Hospital of Hebei Medical University, Hebei, China
| | - Chao Chen
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Li Zhu
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.
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Han Y, Sun J, Xiaojuan, Li MX, Ma Q. Inosine pretreatment of pregnant rats ameliorates maternal inflammation-mediated hypomyelination in pups via microglia polarization switch. Brain Res 2024; 1834:148844. [PMID: 38432260 DOI: 10.1016/j.brainres.2024.148844] [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: 09/17/2023] [Revised: 01/10/2024] [Accepted: 02/29/2024] [Indexed: 03/05/2024]
Abstract
Periventricular leukomalacia (PVL) is a neurological condition observed in premature infants, characterized by hypomyelination and activation of microglia. Maternal inflammation-induced brain injury in offspring significantly contributes to the development of PVL. Currently, there are no clinical pharmaceutical interventions available for pregnant women to prevent maternal inflammation-mediated brain injury in their offspring. Inosine has been shown to modulate the immune response in diverse stressful circumstances, such as injury, ischemia, and inflammation. The aim of this investigation was to examine the potential prophylactic impact of inosine on offspring PVL induced by maternal inflammation. This was accomplished by administering a 1 mg/ml inosine solution (40 ml daily) to pregnant Sprague-Dawley (SD) rats for 16 consecutive days prior to their intraperitoneal injection of lipopolysaccharide (350 µg/kg, once a day, for two days). The results showed that maternal inosine pretreatment significantly reversed the reduction in MBP and CNPase (myelin-related markers), CC-1 and Olig2 (oligodendrocyte-related markers) in their PVL pups (P7), suggesting that inosine administration during pregnancy could improve hypomyelination and enhance the differentiation of oligodendrocyte precursor cells (OPCs) in their PVL pups. Furthermore, the protective mechanism of inosine against PVL is closely associated with the activation and polarization of microglia. This is evidenced by a notable reduction in the quantity of IBA 1-positive microglia, a decrease in the level of CD86 (a marker for M1 microglia), an increase in the level of Arg 1 (a marker for M2 microglia), as well as a decrease in the level of pro-inflammatory factors TNF-α, IL-1β, and IL-6, and an increase in the level of anti-inflammatory factors IL-4 and IL-10 in the brain of PVL pups following maternal inosine pretreatment. Taken together, inosine pretreatment of pregnant rats can improve hypomyelination in their PVL offspring by triggering the M1/M2 switch of microglia.
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Affiliation(s)
- Yong Han
- Basic Medical College, Ningxia Medical University, Yinchuan, Ningxia 750004, PR China
| | - Jinping Sun
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, PR China.
| | - Xiaojuan
- Department of Orthopedics, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, PR China
| | - Ma Xin Li
- Basic Medical College, Ningxia Medical University, Yinchuan, Ningxia 750004, PR China
| | - Quanrui Ma
- Basic Medical College, Ningxia Medical University, Yinchuan, Ningxia 750004, PR China.
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Yang Y, Li Y, Yang W, Yang X, Luo M, Qin L, Zhu J. Protecting effects of 4-octyl itaconate on neonatal hypoxic-ischemic encephalopathy via Nrf2 pathway in astrocytes. J Neuroinflammation 2024; 21:132. [PMID: 38760862 PMCID: PMC11102208 DOI: 10.1186/s12974-024-03121-8] [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: 12/26/2023] [Accepted: 05/01/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND Neonatal hypoxic-ischemic encephalopathy (HIE) is one of the most common neurological problems occurring in the perinatal period. However, there still is not a promising approach to reduce long-term neurodevelopmental outcomes of HIE. Recently, itaconate has been found to exhibit anti-oxidative and anti-inflammatory effects. However, the therapeutic efficacy of itaconate in HIE remains inconclusive. Therefore, this study attempts to explore the pathophysiological mechanisms of oxidative stress and inflammatory responses in HIE as well as the potential therapeutic role of a derivative of itaconate, 4-octyl itaconate (4OI). METHODS We used 7-day-old mice to induce hypoxic-ischemic (HI) model by right common carotid artery ligation followed by 1 h of hypoxia. Behavioral experiments including the Y-maze and novel object recognition test were performed on HI mice at P60 to evaluate long-term neurodevelopmental outcomes. We employed an approach combining non-targeted metabolomics with transcriptomics to screen alterations in metabolic profiles and gene expression in the hippocampal tissue of the mice at 8 h after hypoxia. Immunofluorescence staining and RT-PCR were used to evaluate the pathological changes in brain tissue cells and the expression of mRNA and proteins. 4OI was intraperitoneally injected into HI model mice to assess its anti-inflammatory and antioxidant effects. BV2 and C8D1A cells were cultured in vitro to study the effect of 4OI on the expression and nuclear translocation of Nrf2. We also used Nrf2-siRNA to further validate 4OI-induced Nrf2 pathway in astrocytes. RESULTS We found that in the acute phase of HI, there was an accumulation of pyruvate and lactate in the hippocampal tissue, accompanied by oxidative stress and pro-inflammatory, as well as increased expression of antioxidative stress and anti-inflammatory genes. Treatment of 4OI could inhibit activation and proliferation of microglial cells and astrocytes, reduce neuronal death and relieve cognitive dysfunction in HI mice. Furthermore, 4OI enhanced nuclear factor erythroid-2-related factor (Nfe2l2; Nrf2) expression and nuclear translocation in astrocytes, reduced pro-inflammatory cytokine production, and increased antioxidant enzyme expression. CONCLUSION Our study demonstrates that 4OI has a potential therapeutic effect on neuronal damage and cognitive deficits in HIE, potentially through the modulation of inflammation and oxidative stress pathways by Nrf2 in astrocytes.
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Affiliation(s)
- Yanping Yang
- Department of Anesthesiology, The Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yang Li
- Department of Anesthesiology, The Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Wenyi Yang
- Department of Anesthesiology, The Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xueying Yang
- Department of Physiology, China Medical University, Shenyang, Liaoning, China
| | - Man Luo
- Department of Anesthesiology, Shenzhen Cancer Hospital, Shenzhen, China
| | - Ling Qin
- Department of Physiology, China Medical University, Shenyang, Liaoning, China.
| | - Junchao Zhu
- Department of Anesthesiology, The Shengjing Hospital of China Medical University, Shenyang, Liaoning, China.
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Huang L, Bai D, Su X. Altered expression of transfer RNAs and their possible roles in brain white matter injury. Neuroreport 2024; 35:536-541. [PMID: 38597261 DOI: 10.1097/wnr.0000000000002036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Transfer RNAs (tRNAs) can regulate cell behavior and are associated with neurological disorders. Here, we aimed to investigate the expression levels of tRNAs in oligodendrocyte precursor cells (OPCs) and their possible roles in the regulation of brain white matter injury (WMI). Newborn Sprague-Dawley rats (postnatal day 5) were used to establish a model that mimicked neonatal brain WMI. RNA-array analysis was performed to examine the expression of tRNAs in OPCs. psRNAtarget software was used to predict target mRNAs of significantly altered tRNAs. Gene ontology (GO) and KEGG were used to analyze the pathways for target mRNAs. Eighty-nine tRNAs were changed after WMI (fold change absolute ≥1.5, P < 0.01), with 31 downregulated and 58 upregulated. Among them, three significantly changed tRNAs were identified, with two being significantly increased (chr10.trna1314-ProTGG and chr2.trna2771-ProAGG) and one significantly decreased (chr10.trna11264-GlyTCC). Further, target mRNA prediction and GO/KEGG pathway analysis indicated that the target mRNAs of these tRNAs are mainly involved in G-protein coupled receptor signaling pathways and beta-alanine metabolism, which are both related to myelin formation. In summary, the expression of tRNAs in OPCs was significantly altered after brain WMI, suggesting that tRNAs may play important roles in regulating WMI. This improves the knowledge about WMI pathophysiology and may provide novel treatment targets for WMI.
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Affiliation(s)
- Lingyi Huang
- Department of Orthodontics, West China College of Stomatology/State Key Laboratory of Oral Diseases, Sichuan University
| | - Ding Bai
- Department of Orthodontics, West China College of Stomatology/State Key Laboratory of Oral Diseases, Sichuan University
| | - Xiaojuan Su
- Department of Pediatrics/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Ministry of Education), West China Second University Hospital, Sichuan University, Chengdu, China
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李 文, 宋 娟, 张 含, 杨 禄, 岳 宇, 张 新, 王 永. [Effects of α1-antitrypsin on motor function in mice with immature brain white matter injury]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2024; 26:181-187. [PMID: 38436317 PMCID: PMC10921877 DOI: 10.7499/j.issn.1008-8830.2309003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 03/05/2024]
Abstract
OBJECTIVES To investigate the effects of α1-antitrypsin (AAT) on motor function in adult mice with immature brain white matter injury. METHODS Five-day-old C57BL/6J mice were randomly assigned to the sham surgery group (n=27), hypoxia-ischemia (HI) + saline group (n=27), and HI+AAT group (n=27). The HI white matter injury mouse model was established using HI methods. The HI+AAT group received intraperitoneal injections of AAT (50 mg/kg) 24 hours before HI, immediately after HI, and 72 hours after HI; the HI+saline group received intraperitoneal injections of the same volume of saline at the corresponding time points. Brain T2-weighted magnetic resonance imaging scans were performed at 7 and 55 days after modeling. At 2 months of age, adult mice were evaluated for static, dynamic, and coordination parameters using the Catwalk gait analysis system. RESULTS Compared to the sham surgery group, mice with HI injury showed high signal intensity on brain T2-weighted magnetic resonance imaging at 7 days after modeling, indicating significant white matter injury. The white matter injury persisted at 55 days after modeling. In comparison to the sham surgery group, the HI+saline group exhibited decreased paw print area, maximum contact area, average pressure, maximum pressure, paw print width, average velocity, body velocity, stride length, swing speed, percentage of gait pattern AA, and percentage of inter-limb coordination (left hind paw → left front paw) (P<0.05). The HI+saline group showed increased inter-paw distance, percentage of gait pattern AB, and percentage of phase lag (left front paw → left hind paw) compared to the sham surgery group (P<0.05). In comparison to the HI+saline group, the HI+AAT group showed increased average velocity, body velocity, stride length, and swing speed (right front paw) (P<0.05). CONCLUSIONS The mice with immature brain white matter injury may exhibit significant motor dysfunction in adulthood, while the use of AAT can improve some aspects of their motor function.
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Julien P, Zinni M, Bonnel N, El Kamouh M, Odorcyk F, Peters L, Gautier EF, Leduc M, Broussard C, Baud O. Synergistic effect of sildenafil combined with controlled hypothermia to alleviate microglial activation after neonatal hypoxia-ischemia in rats. J Neuroinflammation 2024; 21:31. [PMID: 38263116 PMCID: PMC10804557 DOI: 10.1186/s12974-024-03022-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/12/2024] [Indexed: 01/25/2024] Open
Abstract
BACKGROUND AND PURPOSE The only validated treatment to prevent brain damage associated with hypoxia-ischemia (HI) encephalopathy of the newborn is controlled hypothermia with limited benefits. Additional putative neuroprotective drug candidates include sildenafil citrate, a phosphodiesterase-type 5 inhibitor. The main objective of this preclinical study is to assess its ability to reduce HI-induced neuroinflammation, in particular through its potential effect on microglial activation. METHODS HI was induced in P10 Sprague-Dawley rats by unilateral carotid permanent artery occlusion and hypoxia (HI) and treated by either hypothermia (HT) alone, Sildenafil (Sild) alone or combined treatment (SildHT). Lesion size and glial activation were analyzed by immunohistochemistry, qRT-PCR, and proteomic analyses performed at P13. RESULTS None of the treatments was associated with a significant early reduction in lesion size 72h after HI, despite significant changes in tissue loss distribution. Significant reductions in both Iba1 + (within the ipsilateral hemisphere) and GFAP + cells (within the ipsilateral hippocampus) were observed in SildHT group, but not in the other treatment groups. In microglia-sorted cells, pro-inflammatory markers, i.e. Il1b, Il6, Nos2, and CD86 were significantly downregulated in SildHT treatment group only. These changes were restricted to the ipsilateral hemisphere, were not evidenced in sorted astrocytes, and were not sex dependent. Proteomic analyses in sorted microglia refined the pro-inflammatory effect of HI and confirmed a biologically relevant impact of SildHT on specific molecular pathways including genes related to neutrophilic functions. CONCLUSIONS Our findings suggest that Sildenafil combined with controlled hypothermia produces maximum effect in mitigating microglial activation induced by HI through complex proteomic regulation. The reduction of neuroinflammation induced by Sildenafil may represent an interesting therapeutic strategy for neonatal neuroprotection.
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Affiliation(s)
- Pansiot Julien
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Manuela Zinni
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Natacha Bonnel
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Marina El Kamouh
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Felipe Odorcyk
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Lea Peters
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France
| | - Emilie-Fleur Gautier
- Institut Cochin, Proteom'IC Facility, INSERM, CNRS, Université Paris Cité, Paris, France
| | - Marjorie Leduc
- Institut Cochin, Proteom'IC Facility, INSERM, CNRS, Université Paris Cité, Paris, France
| | - Cédric Broussard
- Institut Cochin, Proteom'IC Facility, INSERM, CNRS, Université Paris Cité, Paris, France
| | - Olivier Baud
- Inserm UMR1141 NeuroDiderot, Université Paris Cité, Paris, France.
- Laboratory of Child Growth and Development, University of Geneva, Geneva, Switzerland.
- Division of Neonatology and Pediatric Intensive Care, Département de Pédiatrie, Hôpitaux Universitaires de Genève, Laboratoire de Développement et Croissance, Children's University Hospital of Geneva, Geneva, Switzerland.
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Sun J, Wang W, Ma Q, Pan X, Zhai H, Wang J, Han Y, Li Y, Wang Y. Necrostatin-1s Suppresses RIPK1-driven Necroptosis and Inflammation in Periventricular Leukomalacia Neonatal Mice. Neurochem Res 2024; 49:129-141. [PMID: 37642893 DOI: 10.1007/s11064-023-04013-8] [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: 06/06/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/31/2023]
Abstract
Periventricular leukomalacia (PVL), a predominant form of brain injury in preterm survivors, is characterized by hypomyelination and microgliosis and is also the major cause of long-term neurobehavioral abnormalities in premature infants. Receptor-interacting protein kinase 1 (RIPK1) plays a pivotal role in mediating cell death and inflammatory signaling cascade. However, very little is known about the potential effect of RIPK1 in PVL and the underlying mechanism. Herein, we found that the expression level of RIPK1 was drastically increased in the brain of PVL neonatal mice models, and treatment of PVL neonatal mice with Necrostatin-1s (Nec-1s), an inhibitor of RIPK1, greatly ameliorated cerebral ischemic injury, exhibiting an increase of body weights, reduction of cerebral infarct size, neuronal loss, and occurrence of necrosis-like cells, and significantly improved the long-term abnormal neurobehaviors of PVL. In addition, Nec-1s significantly suppressed hypomyelination and promoted the differentiation of oligodendrocyte precursor cells (OPCs), as demonstrated by the increased expression levels of MBP and Olig2, the decreased expression level of GPR17, a significant increase in the number of CC-1-positive cells, and suppression of myelin ultrastructure impairment. Moreover, the mechanism of neuroprotective effects of Nec-1s against PVL is closely associated with its suppression of the RIPK1-mediated necrosis signaling molecules, RIPK1, PIPK3, and MLKL. More importantly, inhibition of RIPK1 could reduce microglial inflammatory injury by triggering the M1 to M2 microglial phenotype, appreciably decreasing the levels of M1 marker CD86 and increasing the levels of M2 markers Arg1 or CD206 in PVL mice. Taken together, inhibition of RIPK1 markedly ameliorates the brain injury and long-term neurobehavioral abnormalities of PVL mice through the reduction of neural cell necroptosis and reversing neuroinflammation.
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Affiliation(s)
- Jinping Sun
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Wei Wang
- Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Quanrui Ma
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Xiaoli Pan
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Hualiang Zhai
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Junyan Wang
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Yong Han
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Yunhong Li
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China.
| | - Yin Wang
- School of Basic Medicine, Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China.
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Zhuo R, Song Z, Wang Y, Zhu M, Liu F, Lin P, Rao R, Zhou Y, Zhao Y, Fan Z, Cui L, Liu H, Li J, Li Y, Guo H, Cai CF, Yang L. Oleoylethanolamide ameliorates motor dysfunction through PPARα-mediates oligodendrocyte differentiation and white matter integrity after ischemic stroke. Phytother Res 2023; 37:5341-5353. [PMID: 37700535 DOI: 10.1002/ptr.7970] [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: 04/02/2022] [Revised: 05/31/2023] [Accepted: 06/03/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND AND AIM Our previous study has revealed that OEA promotes motor function recovery in the chronic stage of ischemic stroke. However, the neuroprotective mechanism of OEA on motor function recovery after stroke still is unexplored. Therefore, the aim of this study was to explore the effects of OEA treatment on angiogenesis, neurogenesis, and white matter repair in the peri-infarct region after cerebral ischemia. EXPERIMENTAL PROCEDURE The adult male rats were subjected to 2 h of middle cerebral artery occlusion. The rats were treated with 10 and 30 mg/kg OEA or vehicle daily starting from day 2 after ischemia induction until they were sacrificed. KEY RESULTS AND CONCLUSIONS The results revealed that OEA increased cortical angiogenesis, neural progenitor cells (NPCs) proliferation, migration, and differentiation. OEA treatment enhanced the survival of newborn neurons and oligodendrogenesis, which eventually repaired the cortical neuronal injury and improved motor function after ischemic stroke. Meanwhile, OEA treatment promoted the differentiation of oligodendrocyte progenitor cells (OPCs) and oligodendrogenesis by activating the PPARα signaling pathway. Our results showed that OEA restores motor function by facilitating cortical angiogenesis, neurogenesis, and white matter repair in rats after ischemic stroke. Therefore, we demonstrate that OEA facilitates functional recovery after ischemic stroke and propose the hypothesis that the long-term application of OEA mitigates the disability after stroke.
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Affiliation(s)
- Rengong Zhuo
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Zhengmao Song
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Yun Wang
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Maoshu Zhu
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Feng Liu
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Pingli Lin
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Rong Rao
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Yu Zhou
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Yun Zhao
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Zhongxiong Fan
- Institute of Materia Medica, Xinjiang University, Urumqi, China
| | - Lishan Cui
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Hongtao Liu
- Department of Pharmacy, The First Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jingwen Li
- Xiang'an Hospital of Xiamen University, Xiamen, China
| | - Ying Li
- Xiamen Medical College, Xiamen, China
| | - Han Guo
- The Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Cheng Fu Cai
- Department of Otorhinolaryngology Head and Neck Surgery, Zhongshan Hospital School of Medicine, Xiamen University, Xiamen, China
- Teaching Hospital of Fujian Medical University, Fuzhou, China
| | - Lichao Yang
- The Fifth Hospital of Xiamen & Institute of Cardiovascular Diseases, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
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Louie AY, Kim JS, Drnevich J, Dibaeinia P, Koito H, Sinha S, McKim DB, Soto-Diaz K, Nowak RA, Das A, Steelman AJ. Influenza A virus infection disrupts oligodendrocyte homeostasis and alters the myelin lipidome in the adult mouse. J Neuroinflammation 2023; 20:190. [PMID: 37596606 PMCID: PMC10439573 DOI: 10.1186/s12974-023-02862-2] [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: 02/11/2023] [Accepted: 07/25/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Recent data suggest that myelin may be altered by physiological events occurring outside of the central nervous system, which may cause changes to cognition and behavior. Similarly, peripheral infection by non-neurotropic viruses is also known to evoke changes to cognition and behavior. METHODS Mice were inoculated with saline or influenza A virus. Bulk RNA-seq, lipidomics, RT-qPCR, flow cytometry, immunostaining, and western blots were used to determine the effect of infection on OL viability, protein expression and changes to the lipidome. To determine if microglia mediated infection-induced changes to OL homeostasis, mice were treated with GW2580, an inhibitor of microglia activation. Additionally, conditioned medium experiments using primary glial cell cultures were also used to test whether secreted factors from microglia could suppress OL gene expression. RESULTS Transcriptomic and RT-qPCR analyses revealed temporal downregulation of OL-specific transcripts with concurrent upregulation of markers characteristic of cellular stress. OLs isolated from infected mice had reduced cellular expression of myelin proteins compared with those from saline-inoculated controls. In contrast, the expression of these proteins within myelin was not different between groups. Similarly, histological and immunoblotting analysis performed on various brain regions indicated that infection did not alter OL viability, but increased expression of a cellular stress marker. Shot-gun lipidomic analysis revealed that infection altered the lipid profile within the prefrontal cortex as well as in purified brain myelin and that these changes persisted after recovery from infection. Treatment with GW2580 during infection suppressed the expression of genes associated with glial activation and partially restored OL-specific transcripts to baseline levels. Finally, conditioned medium from activated microglia reduced OL-gene expression in primary OLs without altering their viability. CONCLUSIONS These findings show that peripheral respiratory viral infection with IAV is capable of altering OL homeostasis and indicate that microglia activation is likely involved in the process.
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Affiliation(s)
- Allison Y Louie
- Neuroscience Program, 2325/21 Beckman Institute, 405 North Mathews Ave., Urbana, IL, 61801, USA
| | - Justin S Kim
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 3306, IBB, Parker H. Petit Institute for Bioengineering and Biosciences, 315 Fernst Dr. NW, Atlanta, GA, 30332, USA
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, 3516 Veterinary Medicine Basic Sciences Bldg., 2001 South Lincoln Avenue, Urbana, IL, 61802, USA
| | - Jenny Drnevich
- Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Payam Dibaeinia
- Department of Computer Science, University of Illinois at Urbana-Champaign, 201 North Goodwin Avenue, Urbana, IL, 61801, USA
| | - Hisami Koito
- Department of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama, 350-0295, Japan
| | - Saurabh Sinha
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
- Department of Computer Science, University of Illinois at Urbana-Champaign, 201 North Goodwin Avenue, Urbana, IL, 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Dr., Urbana, IL, 61801, USA
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, USA
| | - Daniel B McKim
- Neuroscience Program, 2325/21 Beckman Institute, 405 North Mathews Ave., Urbana, IL, 61801, USA
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA
| | - Katiria Soto-Diaz
- Neuroscience Program, 2325/21 Beckman Institute, 405 North Mathews Ave., Urbana, IL, 61801, USA
| | - Romana A Nowak
- Department of Computer Science, University of Illinois at Urbana-Champaign, 201 North Goodwin Avenue, Urbana, IL, 61801, USA
- Department of Bioengineering, Cancer Center at Illinois, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA
| | - Aditi Das
- Neuroscience Program, 2325/21 Beckman Institute, 405 North Mathews Ave., Urbana, IL, 61801, USA.
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA.
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 3306, IBB, Parker H. Petit Institute for Bioengineering and Biosciences, 315 Fernst Dr. NW, Atlanta, GA, 30332, USA.
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, 3516 Veterinary Medicine Basic Sciences Bldg., 2001 South Lincoln Avenue, Urbana, IL, 61802, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Dr., Urbana, IL, 61801, USA.
| | - Andrew J Steelman
- Neuroscience Program, 2325/21 Beckman Institute, 405 North Mathews Ave., Urbana, IL, 61801, USA.
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, 1201 W. Gregory Dr., Urbana, IL, 61801, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Dr., Urbana, IL, 61801, USA.
- Department of Bioengineering, Cancer Center at Illinois, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave., Urbana, IL, 61801, USA.
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Yang L, Zhang Y, Yu X, Li D, Liu N, Xue X, Fu J. Periventricular Microglia Polarization and Morphological Changes Accompany NLRP3 Inflammasome-Mediated Neuroinflammation after Hypoxic-Ischemic White Matter Damage in Premature Rats. J Immunol Res 2023; 2023:5149306. [PMID: 37636861 PMCID: PMC10460280 DOI: 10.1155/2023/5149306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 07/08/2023] [Accepted: 07/13/2023] [Indexed: 08/29/2023] Open
Abstract
White matter damage (WMD) is a primary cause of cerebral palsy and cognitive impairment in preterm infants, and no effective treatments are available. Microglia are a major component of the innate immune system. When activated, they form typical pro-inflammatory (M1) and anti-inflammatory (M2) phenotypes and regulate myelin development and synapse formation. Therefore, they may play a pivotal role in hypoxic-ischemic (HI) WMD. Herein, we investigated neural inflammation and long-term microglia phenotypic polarization in a neonatal rat model of hypoxia-ischemia-induced WMD and elucidated the underlying pathophysiological processes. We exposed 3-day-old (P3) Sprague-Dawley rats to hypoxia (8% oxygen) for 2.5 hr after unilateral common carotid artery ligation. The activation of NLRP3 inflammatory bodies, microglia M1/M2 polarization, myelination, and synaptic development in our model were monitored 7, 14, and 21 days after birth. In addition, the Morris water maze test was performed on postnatal Day 28. We confirmed myelination disturbance in the periventricular white matter, abnormal synaptic development, and behavioral changes in the periventricular area during the development of HI WMD. In addition, we found an association between the occurrence and development of HI WMD and activation of the NLRP3 inflammasome, microglial M1/M2 polarization, and the release of inflammatory factors. NLRP3 inhibition can play an anti-inflammatory role by inhibiting the differentiation of microglia into the M1 phenotype, thereby improving myelination and synapse formation. In conclusion, microglia are key mediators of the inflammatory response and exhibit continuous phenotypic polarization 7-21 days after HI-induced WMD. This finding can potentially lead to a new treatment regimen targeting the phenotypic polarization of microglia early after HI-induced brain injury.
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Affiliation(s)
- Liu Yang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
- Department of Pediatrics, The Second Hospital of Dalian Medical University, Dalian 116021, Liaoning, China
| | - Yajun Zhang
- Department of Anesthesiology, Dalian Municipal Maternal and Child Health Care Hospital, Dalian 116021, Liaoning, China
| | - Xuefei Yu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Danni Li
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Na Liu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Xindong Xue
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Jianhua Fu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
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Tian T, Gan T, Chen J, Lu J, Zhang G, Zhou Y, Li J, Shao H, Liu Y, Zhu H, Wu D, Jiang C, Shao J, Shi J, Yang W, Zhu W. Graphic Intelligent Diagnosis of Hypoxic-Ischemic Encephalopathy Using MRI-Based Deep Learning Model. Neonatology 2023; 120:441-449. [PMID: 37231912 DOI: 10.1159/000530352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/20/2023] [Indexed: 05/27/2023]
Abstract
INTRODUCTION Heterogeneous MRI manifestations restrict the efficiency and consistency of neuroradiologists in diagnosing hypoxic-ischemic encephalopathy (HIE) due to complex injury patterns. This study aimed to develop and validate an intelligent HIE identification model (termed as DLCRN, deep learning clinical-radiomics nomogram) based on conventional structural MRI and clinical characteristics. METHODS In this retrospective case-control study, full-term neonates with HIE and healthy controls were collected in two different medical centers from January 2015 to December 2020. Multivariable logistic regression analysis was implemented to establish the DLCRN model based on conventional MRI sequences and clinical characteristics. Discrimination, calibration, and clinical applicability were used to evaluate the model in the training and validation cohorts. Grad-class activation map algorithm was implemented to visualize the DLCRN. RESULTS 186 HIE patients and 219 healthy controls were assigned to the training, internal validation, and independent validation cohorts. Birthweight was incorporated with deep radiomics signatures to create the final DLCRN model. The DLCRN model achieved better discriminatory power than simple radiomics models, with an area under the curve (AUC) of 0.868, 0.813, and 0.798 in the training, internal validation, and independent validation cohorts, respectively. The DLCRN model was well calibrated and has clinical potential. Visualization of the DLCRN highlighted the lesion areas that conformed to radiological identification. CONCLUSION Visualized DLCRN may be a useful tool in the objective and quantitative identification of HIE. Scientific application of the optimized DLCRN model may save time for screening early mild HIE, improve the consistency of HIE diagnosis, and guide timely clinical management.
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Affiliation(s)
- Tian Tian
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tongjia Gan
- Medical Imaging Center, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | | | - Jun Lu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of CT and MRI, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi, China
| | - Guiling Zhang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiran Zhou
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jia Li
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haoyue Shao
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yufei Liu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongquan Zhu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Di Wu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chengcheng Jiang
- Department of Radiology, Maternal and Child Health Hospital of Hubei Province, Wuhan, China
| | - Jianbo Shao
- Medical Imaging Center, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingjing Shi
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenzhong Yang
- Department of Radiology, Maternal and Child Health Hospital of Hubei Province, Wuhan, China
| | - Wenzhen Zhu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Kalinichenko SG, Pushchin II, Matveeva NY. Neurotoxic and cytoprotective mechanisms in the ischemic neocortex. J Chem Neuroanat 2023; 128:102230. [PMID: 36603664 DOI: 10.1016/j.jchemneu.2022.102230] [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: 09/19/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 01/03/2023]
Abstract
Neuronal damage in ischemic stroke occurs due to permanent imbalance between the metabolic needs of the brain and the ability of the blood-vascular system to maintain glucose delivery and adequate gas exchange. Oxidative stress and excitotoxicity trigger complex processes of neuroinflammation, necrosis, and apoptosis of both neurons and glial cells. This review summarizes data on the structural and chemical changes in the neocortex and main cytoprotective effects induced by focal ischemic stroke. We focus on the expression of neurotrophins (NT) and molecular and cellular changes in neurovascular units in ischemic brain. We also discuss how these factors affect the apoptosis of cortical cells. Ischemic damage involves close interaction of a wide range of signaling molecules, each acting as an efficient marker of cell state in both the ischemic core and penumbra. NTs play the main regulatory role in brain tissue recovery after ischemic injury. Heterogeneous distribution of the BDNF, NT-3, and GDNF immunoreactivity is concordant with the selective response of different types of cortical neurons and glia to ischemic injury and allows mapping the position of viable neurons. Astrocytes are the central link in neurovascular coupling in ischemic brain by providing other cells with a wide range of vasotropic factors. The NT expression coincides with the distribution of reactive astrocytes, marking the boundaries of the penumbra. The development of ischemic stroke is accompanied by a dramatic change in the distribution of GDNF reactivity. In early ischemic period, it is mainly observed in cortical neurons, while in late one, the bulk of GDNF-positive cells are various types of glia, in particular, astrocytes. The proportion of GDNF-positive astrocytes increases gradually throughout the ischemic period. Some factors that exert cytoprotective effects in early ischemic period may display neurotoxic and pro-apoptotic effects later on. The number of apoptotic cells in the ischemic brain tissue correlates with the BDNF levels, corroborating its protective effects. Cytoprotection and neuroplasticity are two lines of brain protection and recovery after ischemic stroke. NTs can be considered an important link in these processes. To develop efficient pharmacological therapy for ischemic brain injury, we have to deepen our understanding of neurochemical adaptation of brain tissue to acute stroke.
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Affiliation(s)
- Sergei G Kalinichenko
- Department of Histology, Cytology, and Embryology, Pacific State Medical University, Vladivostok 690950, Russia
| | - Igor I Pushchin
- Laboratory of Physiology, A.V. Zhirmusky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690041, Russia.
| | - Natalya Yu Matveeva
- Department of Histology, Cytology, and Embryology, Pacific State Medical University, Vladivostok 690950, Russia
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Effect of Hyperbaric oxygen on myelin injury and repair after hypoxic-ischemic brain damage in adult rat. Neurosci Lett 2023; 794:137015. [PMID: 36526030 DOI: 10.1016/j.neulet.2022.137015] [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: 09/05/2022] [Revised: 11/29/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Hypoxic-ischemic encephalopathy (HIE) is one of the leading causes of death and neurological disability with limited options for treatment in neonates, children and adults worldwide. The pathogenesis and treatment of white matter (WM) injury in adult patients with HIE remains largely elusive. METHODS Sixty male Sprague-Dawley rats were randomly divided into control group, sham-operated group (HBO treatment 6 days after sham operation), and Hypoxia-ischemia (HI) induced brain damage group (receiving left carotid arteries ligation + hypoxia treatment), 1.5ATA hyperbaric oxygen group (HI + 1.5ATA HBOT) and 2.5ATA HBOT group (HI + 2.5ATA HBOT). All the rats were evaluated by water maze before operation, and 6 days after operation, and the function of learning and memory was evaluated; Demyelination in the hippocampus and prefrontal cortex was observed by Luxol fast blue staining (LFB) and MBP immunostaining; the number of Myelin Oligodendrocyte Glycoprotein (MOG),glial fibrillary acidic protein (GFAP), ionic calcium-binding adaptor (Iba-1) and NG2 positive cells in the hippocampus and prefrontal cortex were determined by immunofluorescence staining. The expression of interleukin-1β (IL-1β), IL-6 and tumor necrosis factor (TNF-α), Hypoxia Inducible Factor 1 Subunit Alpha (HIF1-α) and Superoxide dismutase (SOD) in brain and serum of rats were measured by Western Blot method and Enzyme linked immunosorbent assay (ELISA). RESULTS Compared with those in the normal control group and sham-operated group, in the HI group, the learning and memory abilities of rats were significantly decreased (P < 0.05), the intensity of LFB and MBP immunostaining in hippocampus and prefrontal cortex was significantly decreased (P < 0.05); the number of MOG positive oligodendrocytes (OLs) significantly decreased (P < 0.05), whereas the number of Iba-1, GFAP, NG2 positive microglias, astrocytes and oligodendrocyte precursors (OPCs) was increased (P < 0.05); the level of IL-1β, IL-6, TNF-α and HIF-1a in brain and serum were significantly increased (P < 0.05), whereas SOD was significantly decreased in brain and increased in serum. Compared with those in the HI group, in both 1.5ATA and 2.5ATA HBOT group, the learning and memory abilities were significantly increased (P < 0.05); the intensity of LFB and MBP immunostaining in the hippocampus and prefrontal cortex was significantly increased (P < 0.05); the number of MOG positive OLs significantly increased (P < 0.05); the number of Iba-1, GFAP, NG2 positive microglias, astrocytes and OPCs was decreased (P < 0.05); the level of IL-1β, IL-6, TNF-α and HIF-1a in brain and serum were significantly decreased (P < 0.05); the level of SOD was significantly increased in brain and decreased in serum. Morever, compared with those in the 1.5ATA group, 2.5ATA provided better treatment results (P < 0.05). CONCLUSION In the present study, we demonstrated the mechanism of different pressure HBOT on HI induced brain injury from three levels: (1) On a tissue level, HBOT protects against HI induced myelin injury; (2) On a cellular level, HBOT attenuates HI-induced OL loss, suppresss the reactive activation of astrocyte and microglia, and may promote OPC to differentiate into OL; (3) On a molecular level, HBOT inhibites neuroinflammation, and balances oxidative damage and antioxidant capacity. Among the above effects, 2.5ATA HBOT is better than 1.5ATA HBOT. Ongoing research will continue to seek out the signalling pathways and molecules mechanisms on different pressure of HBOT-related myelin protection, and possibly expand suitable HBOT use in adult HIE clinically.
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Zhang S, Li W, Xu Y, Li T, Ek J, Zhang X, Wang Y, Song J, Zhu C, Wang X. Alpha1-antitrypsin protects the immature mouse brain following hypoxic-ischemic injury. Front Cell Neurosci 2023; 17:1137497. [PMID: 36950515 PMCID: PMC10025360 DOI: 10.3389/fncel.2023.1137497] [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: 01/04/2023] [Accepted: 02/13/2023] [Indexed: 03/08/2023] Open
Abstract
Introduction: Preterm brain injury often leads to lifelong disabilities affecting both cognitive and motor functions, and effective therapies are limited. Alpha1-antitrypsin (AAT), an endogenous inhibitor of serine proteinases with anti-inflammatory, anti-apoptotic, and cytoprotective properties, might be beneficial in treating preterm brain injury. The aim of this study was to investigate whether AAT has neuroprotective effects in a mouse preterm brain injury model. Methods: Preterm brain injury was induced on postnatal day 5, and mouse pups' right common carotid arteries were cut between two ligations followed by hypoxia induction. Brain injury was evaluated through immunohistochemistry staining and magnetic resonance imaging. Fluoro-Jade B and immunohistochemistry staining were performed to investigate the neuronal cell death and blood-brain barrier (BBB) permeability. The motor function and anxiety-like behaviors were revealed by CatWalk gait analysis and the open field test. Results: After hypoxia-ischemia (HI) insult, brain injury was alleviated by AAT treatment, and this was accompanied by reduced BBB permeability, reduced neuronal cell death and caspase-3 activation, and inhibition of microglia activation. In addition, AAT administration significantly improved HI-induced motor function deficiencies in mice. The neuroprotective effect of AAT was more pronounced in male mice. Conclusion: AAT treatment is neuroprotective against preterm brain injury in neonatal mice, and the effect is more pronounced in males.
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Affiliation(s)
- Shan Zhang
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
| | - Wendong Li
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yiran Xu
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Tao Li
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
- Henan Children’s Neurodevelopment Engineering Research Center, Children’s Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Joakim Ek
- Centre of Perinatal Medicine and Health, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
| | - Xiaoli Zhang
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yafeng Wang
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
- Henan Children’s Neurodevelopment Engineering Research Center, Children’s Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Juan Song
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Changlian Zhu
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
- Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
- *Correspondence: Changlian Zhu Xiaoyang Wang
| | - Xiaoyang Wang
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Centre of Perinatal Medicine and Health, Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
- Centre of Perinatal Medicine and Health, Institute of Clinical Science, University of Gothenburg, Gothenburg, Sweden
- *Correspondence: Changlian Zhu Xiaoyang Wang
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Lin Q, Hu DW, Hao XH, Zhang G, Lin L. Effect of Hypoxia-Ischemia on the Expression of Iron-Related Proteins in Neonatal Rat Brains. Neural Plast 2023; 2023:4226139. [PMID: 37124874 PMCID: PMC10139812 DOI: 10.1155/2023/4226139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 02/06/2023] [Accepted: 04/03/2023] [Indexed: 05/02/2023] Open
Abstract
Hypoxic-ischemic white matter injury (WMI) pathogenesis in preterm infants is not well established, and iron-related proteins in the brain may play an important role in imbalanced iron metabolism. We aimed to investigate the iron-related protein changes in neonatal rats after hypoxia-ischemia (HI), clarify the role of iron-related proteins in hypoxic-ischemic WMI, and potentially provide a new target for the clinical treatment of hypoxic-ischemic WMI in preterm infants. We adopted a WMI animal model of bilateral common carotid artery electrocoagulation combined with hypoxia in neonatal 3-day-old Sprague-Dawley rats. We observed basic myelin protein (MBP) and iron-related protein expression in the brain (ferritin, transferrin receptor [TfR], and membrane iron transporter 1 [FPN1]) via Western blot and double immunofluorescence staining. The expression of MBP in the WMI group was significantly downregulated on postoperative days (PODs) 14, 28, and 56. Ferritin levels were significantly increased on PODs 3, 7, 14, and 28 and were most significant on POD 28, returning to the sham group level on POD 56. FPN1 levels were significantly increased on PODs 7, 28, and 56 and were still higher than those in the sham group on POD 56. TfR expression was significantly upregulated on PODs 1, 7, and 28 and returned to the sham group level on POD 56. Immunofluorescence staining showed that ferritin, TfR, and FPN1 were expressed in neurons, blood vessels, and oligodendrocytes in the cortex and corpus callosum on POD 28. Compared with the sham group, the immune-positive markers of three proteins in the WMI group were significantly increased. The expression of iron-related proteins in the brain (ferritin, FPN1, and TfR) showed spatiotemporal dynamic changes and may play an important role in hypoxic-ischemic WMI.
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Affiliation(s)
- Qing Lin
- Laboratory of Clinical Applied Anatomy, Department of Human Anatomy, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province, Fuzhou 350122, China
| | - Ding-Wang Hu
- Laboratory of Clinical Applied Anatomy, Department of Human Anatomy, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province, Fuzhou 350122, China
| | - Xin-Hui Hao
- Laboratory of Clinical Applied Anatomy, Department of Human Anatomy, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province, Fuzhou 350122, China
| | - Geng Zhang
- Laboratory of Clinical Applied Anatomy, Department of Human Anatomy, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
- Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province, Fuzhou 350122, China
| | - Ling Lin
- Public Technology Service Center, Fujian Medical University, Fuzhou 350122, China
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Baldassarro VA, Stanzani A, Giardino L, Calzà L, Lorenzini L. Neuroprotection and neuroregeneration: roles for the white matter. Neural Regen Res 2022; 17:2376-2380. [PMID: 35535874 PMCID: PMC9120696 DOI: 10.4103/1673-5374.335834] [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] [Indexed: 11/04/2022] Open
Abstract
Efficient strategies for neuroprotection and repair are still an unmet medical need for neurodegenerative diseases and lesions of the central nervous system. Over the last few decades, a great deal of attention has been focused on white matter as a potential therapeutic target, mainly due to the discovery of the oligodendrocyte precursor cells in the adult central nervous system, a cell type able to fully repair myelin damage, and to the development of advanced imaging techniques to visualize and measure white matter lesions. The combination of these two events has greatly increased the body of research into white matter alterations in central nervous system lesions and neurodegenerative diseases and has identified the oligodendrocyte precursor cell as a putative target for white matter lesion repair, thus indirectly contributing to neuroprotection. This review aims to discuss the potential of white matter as a therapeutic target for neuroprotection in lesions and diseases of the central nervous system. Pivot conditions are discussed, specifically multiple sclerosis as a white matter disease; spinal cord injury, the acute lesion of a central nervous system component where white matter prevails over the gray matter, and Alzheimer's disease, where the white matter was considered an ancillary component until recently. We first describe oligodendrocyte precursor cell biology and developmental myelination, and its regulation by thyroid hormones, then briefly describe white matter imaging techniques, which are providing information on white matter involvement in central nervous system lesions and degenerative diseases. Finally, we discuss pathological mechanisms which interfere with myelin repair in adulthood.
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Affiliation(s)
| | - Agnese Stanzani
- Interdepartmental Center for Industrial Research in Life Sciences and Technologies, University of Bologna, Bologna, Italy
| | - Luciana Giardino
- Department of Veterinary Medical Science, University of Bologna, Bologna; Fondazione IRET, Ozzano Emilia, Italy
| | - Laura Calzà
- Fondazione IRET, Ozzano Emilia; Department of Pharmacy and Biotechnology, University of Bologna, Bologna; Montecatone Rehabilitation Institute, Imola, Italy
| | - Luca Lorenzini
- Department of Veterinary Medical Science, University of Bologna, Bologna, Italy
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20
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Targeting Persistent Neuroinflammation after Hypoxic-Ischemic Encephalopathy-Is Exendin-4 the Answer? Int J Mol Sci 2022; 23:ijms231710191. [PMID: 36077587 PMCID: PMC9456443 DOI: 10.3390/ijms231710191] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/26/2022] [Accepted: 08/30/2022] [Indexed: 11/17/2022] Open
Abstract
Hypoxic-ischemic encephalopathy is brain injury resulting from the loss of oxygen and blood supply around the time of birth. It is associated with a high risk of death or disability. The only approved treatment is therapeutic hypothermia. Therapeutic hypothermia has consistently been shown to significantly reduce the risk of death and disability in infants with hypoxic-ischemic encephalopathy. However, approximately 29% of infants treated with therapeutic hypothermia still develop disability. Recent preclinical and clinical studies have shown that there is still persistent neuroinflammation even after treating with therapeutic hypothermia, which may contribute to the deficits seen in infants despite treatment. This suggests that potentially targeting this persistent neuroinflammation would have an additive benefit in addition to therapeutic hypothermia. A potential additive treatment is Exendin-4, which is a glucagon-like peptide 1 receptor agonist. Preclinical data from various in vitro and in vivo disease models have shown that Exendin-4 has anti-inflammatory, mitochondrial protective, anti-apoptotic, anti-oxidative and neurotrophic effects. Although preclinical studies of the effect of Exendin-4 in perinatal hypoxic-ischemic brain injury are limited, a seminal study in neonatal mice showed that Exendin-4 had promising neuroprotective effects. Further studies on Exendin-4 neuroprotection for perinatal hypoxic-ischemic brain injury, including in large animal translational models are warranted to better understand its safety, window of opportunity and effectiveness as an adjunct with therapeutic hypothermia.
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21
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miR-214-3p Deficiency Enhances Caspase-1-Dependent Pyroptosis of Microglia in White Matter Injury. J Immunol Res 2022. [DOI: 10.1155/2022/1642896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
White matter injury (WMI) is the most frequent impairment of neurodevelopment in preterm infants. Here, we report that the caspase-1 inflammasome is abundantly activated in the microglia of WMI mice and results in increased pyroptosis of microglia. Pharmacology inhibition of caspase-1 cleavage alleviated the pathogenesis of WMI mice. The expression of microRNA miR-214-3p was largely reduced in the microglia of WMI mice compared to controls. Compromised expression of miR-214-3p on microglia gives rise to the inflammasome activation and microglial pyroptosis. Treatment with miR-214-3p agomir is sufficient to relieve the white matter lesion and demyelination in WMI mice. miR-214-3p is able to bind to the 3
region of the NLRP-3 inflammasome compartment NEK7, preventing the transcription of NEK7 mRNA. As a result, in WMI mice, the lack of miR-214-3p leads to the accumulation of NEK7 which supports NLRP 3 inflammasome activation, microglial pyroptosis, and white matter pathogenesis.
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22
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Cai Q, Zhang X, Shen L, Song H, Wang T. The protective effect of MiR-27a on the neonatal hypoxic-ischemic encephalopathy by targeting FOXO1 in rats. Transl Pediatr 2022; 11:1199-1208. [PMID: 35958013 PMCID: PMC9360825 DOI: 10.21037/tp-22-259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/04/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Neonatal hypoxic-ischemic encephalopathy (HIE), a kind of hypoxic-ischemic brain damage caused by perinatal asphyxia, is the most crucial cause of neonatal death and long-term neurological dysfunction in children. We aimed to investigate the protective effects of micro (mi)R-27a on HIE in neonatal rats. METHODS A rat model of neonatal HIE was constructed by modification of the Rice-Vannucci model. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to test the expressions of miR-27a, FOXO1 messenger RNA (mRNA), interleukin-1β (IL-1β) mRNA, and tumor necrosis factor-α (TNF-α) mRNA, and western blot was applied to test the expression of FOXO1. In order to overexpress miR-27a, an intracerebroventricular injection (i.c.v) of miR-27a mimic was administered. We adopted 2,3,5-triphenytetrazolium chloride (TTC) staining and brain water content measurement to test the effects of miR-27a on the infarcted volume and edema in brain after HIE. Flow cytometry (FCM) analysis was applied to test the effects of miR-27a on the infiltrated peripheral immune cells in the rat brains after HIE. RESULTS We successfully established a rat model of neonatal HIE. It was revealed that the expressions of miR-27a decreased gradually after HIE, however, the expressions of FOXO1 mRNA increased. After injection of the miR-27a mimic, the expression of miR-27a in the rat HIE model brains was significantly upregulated, however, the expression of FOXO1 was robustly downregulated. Both TTC staining and brain water content showed that the infarcted volume and brain edema was markedly increased after HIE. Interestingly, the overexpression of miR-27a reduced the infarcted volume and edema induced by HIE. Additionally, RT-qPCR and FCM analysis showed that HIE lead to increases of IL-1β, TNF-α, and infiltrated immune cells. Overexpression of miR-27a could reduce the expressions of IL-1β mRNA and TNF-α mRNA, and the cell numbers of infiltrated peripheral macrophages and neutrophils in the brain. CONCLUSIONS MiR-27a plays protective roles by reducing infarct volume and brain edema, and inhibiting inflammatory factors and infiltrated peripheral immune cells by targeting FOXO1 in neonatal HIE rats.
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Affiliation(s)
- Qun Cai
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong, China
| | - Xiaoqun Zhang
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong, China
| | - Liyuan Shen
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong, China
| | - Honghua Song
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong, China
| | - Ting Wang
- Department of Emergency, Affiliated Hospital of Nantong University, Nantong, China
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23
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Gargas J, Janowska J, Ziabska K, Ziemka-Nalecz M, Sypecka J. Neonatal Rat Glia Cultured in Physiological Normoxia for Modeling Neuropathological Conditions In Vitro. Int J Mol Sci 2022; 23:ijms23116000. [PMID: 35682683 PMCID: PMC9180927 DOI: 10.3390/ijms23116000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/20/2022] [Accepted: 05/24/2022] [Indexed: 11/16/2022] Open
Abstract
Cell culture conditions were proven to highly affect crucial biological processes like proliferation, differentiation, intercellular crosstalk, and senescence. Oxygen tension is one of the major factors influencing cell metabolism and thus, modulating cellular response to pathophysiological conditions. In this context, the presented study aimed at the development of a protocol for efficient culture of rat neonatal glial cells (microglia, astrocytes, and oligodendrocytes) in oxygen concentrations relevant to the nervous tissue. The protocol allows for obtaining three major cell populations, which play crucial roles in sustaining tissue homeostasis and are known to be activated in response to a wide spectrum of external stimuli. The cells are cultured in media without supplement addition to avoid potential modulation of cell processes. The application of active biomolecules for coating culturing surfaces might be useful for mirroring physiological cell interactions with extracellular matrix components. The cell fractions can be assembled as cocultures to further evaluate investigated mechanisms, intercellular crosstalk, or cell response to tested pharmacological compounds. Applying additional procedures, like transient oxygen and glucose deprivation, allows to mimic in vitro the selected pathophysiological conditions. The presented culture system for neonatal rat glial cells is a highly useful tool for in vitro modeling selected neuropathological conditions.
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Tessema B, Sack U, König B, Serebrovska Z, Egorov E. Effects of Intermittent Hypoxia in Training Regimes and in Obstructive Sleep Apnea on Aging Biomarkers and Age-Related Diseases: A Systematic Review. Front Aging Neurosci 2022; 14:878278. [PMID: 35677200 PMCID: PMC9168371 DOI: 10.3389/fnagi.2022.878278] [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: 02/17/2022] [Accepted: 04/21/2022] [Indexed: 11/13/2022] Open
Abstract
Several studies have assessed the effects of intermittent hypoxia-normoxia training (IHNT), intermittent hypoxia-hyperoxia training (IHHT), and obstructive sleep apnea (OSA) on aging and age-related diseases in humans; however, the results remain contradictory. Therefore, this review aims to systematically summarize the available studies on the effects of IHNT, IHHT, and OSA on aging and age-related diseases. Relevant studies were searched from PubMed, Google Scholar, Cochrane Library databases, and through manual searching from reference lists of eligible studies. A total of 38 eligible studies were included in this systematic review. IHHT and IHNT provide positive effects on several age-related parameters including quality of life, cognitive and physical functions, plasma level of glucose and cholesterol/LDL, systolic blood pressure, red blood cells, and inflammation. Moreover, moderate intermittent hypoxia induces telomerase reverse transcriptase (TERT) activity and telomere stabilization, delays induction of senescence-associated markers expression and senescence-associated β-galactosidase, upregulates pluripotent marker (Oct4), activates a metabolic shift, and raises resistance to pro-apoptotic stimuli. On the contrary, intermittent hypoxia in OSA causes hypertension, metabolic syndrome, vascular function impairment, quality of life and cognitive scores reduction, advanced brain aging, increase in insulin resistance, plasma hydrogen peroxide, GSH, IL-6, hsCRP, leptin, and leukocyte telomere shortening. Thus, it can be speculated that the main factor that determines the direction of the intermittent hypoxia action is the intensity and duration of exposure. There is no direct study to prove that IHNT/IHHT actually increases life expectancy in humans. Therefore, further study is needed to investigate the actual effect of IHNT/IHHT on aging in humans.Systematic Review Registrationwww.crd.york.ac.uk/prospero, identifier CRD42022298499.
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Affiliation(s)
- Belay Tessema
- Institute of Clinical Immunology, Faculty of Medicine, Leipzig University, Leipzig, Germany
- Institute of Medical Microbiology and Epidemiology of Infectious Diseases, Faculty of Medicine, Leipzig University, Leipzig, Germany
- Department of Medical Microbiology, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
- *Correspondence: Belay Tessema, ,
| | - Ulrich Sack
- Institute of Clinical Immunology, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Brigitte König
- Institute of Medical Microbiology and Epidemiology of Infectious Diseases, Faculty of Medicine, Leipzig University, Leipzig, Germany
| | - Zoya Serebrovska
- Department of General and Molecular Pathophysiology, Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Egor Egorov
- IPAM Institute for Preventive and Anti-Aging Medicine, Berlin, Germany
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Liu L, Fang L, Duan B, Wang Y, Cui Z, Yang L, Wu D. Multi-Hit White Matter Injury-Induced Cerebral Palsy Model Established by Perinatal Lipopolysaccharide Injection. Front Pediatr 2022; 10:867410. [PMID: 35733809 PMCID: PMC9207278 DOI: 10.3389/fped.2022.867410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
Cerebral palsy (CP) is a group of permanent, but not unchanging, disorders of movement and/or posture and motor function. Since the major brain injury associated with CP is white matter injury (WMI), especially, in preterm infants, we established a "multi-hit" rat model to mimic human WMI in symptomatology and at a histological level. In our WMI model, pups suffering from limb paresis, incoordination, and direction difficulties fit the performance of CP. Histologically, they present with fewer neural cells, inordinate fibers, and more inflammatory cell infiltration, compared to the control group. From the electron microscopy results, we spotted neuronal apoptosis, glial activation, and myelination delay. Besides, the abundant appearance of IBA1-labeled microglia also implied that microglia play a role during neuronal cell injury. After activation, microglia shift between the pro-inflammatory M1 type and the anti-inflammatory M2 type. The results showed that LPS/infection stimulated IBA1 + (marked activated microglia) expression, downregulated CD11c + (marked M1 phenotype), and upregulated Arg 1 + (marked M2 phenotype) protein expression. It indicated an M1 to M2 transition after multiple infections. In summary, we established a "multi-hit" WMI-induced CP rat model and demonstrated that the microglial activation correlates tightly with CP formation, which may become a potential target for future studies.
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Affiliation(s)
- Le Liu
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Department of Pediatrics, Maternal and Child Health Hospital, The Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Liwei Fang
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Boyang Duan
- The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yue Wang
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhenzhen Cui
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Li Yang
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - De Wu
- Department of Pediatrics, Pediatric Neurorehabilitation Center, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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Yang L, Li CY, Ouyang JY, Li MZ, Zhan Y, Feng XF, Lu Y, Li MC, Lei JF, Zhao T, Wang L, Zou HY, Zhao H. Trillium tschonoskii rhizomes' saponins induces oligodendrogenesis and axonal reorganization for ischemic stroke recovery in rats. JOURNAL OF ETHNOPHARMACOLOGY 2021; 279:114358. [PMID: 34166736 DOI: 10.1016/j.jep.2021.114358] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Trillium tschonoskii Maxim. is one of traditional Chinese medical herbs that has been utilized to treat brain damages and cephalalgia. The neuroprotective effect of total saponins from Trillium tschonoskii rhizome (TSTT) has been demonstrated efficacy in rats following ischemia. However, the axonal remodeling effect of TSTT and the detailed mechanisms after ischemic stroke have not been investigated. AIM OF THE STUDY We aimed to estimate therapeutic role of TSTT in axonal remodeling using magnetic resonance imaging (MRI) technique, and explored possible mechanisms underlying this process followed by histological assays in ischemic rats. METHODS Male Sprague-Dawley (SD) rats underwent permanently focal cerebral ischemia induced by occluding right permanent middle cerebral artery. TSTT was intragastrically administrated 6 h after surgery and once daily for consecutive 15 days. Neurological function was assessed by the motor deficit score and beam walking test. T2 relaxation mapping and diffusion tensor imaging (DTI) were applied for detecting cerebral tissues damages and microstructural integrity of axons. Luxol fast blue (LFB) and transmission electron microscope (TEM) were performed to evaluate histopathology in myelinated axons. Double immunofluorescent staining was conducted to assess oligodendrogenesis. Furthermore, the protein expressions regarding to axonal remodeling related signaling pathways were detected by Western blot assays. RESULTS TSTT treatment (65, 33 mg/kg) markedly improved motor function after ischemic stroke. T2 mapping MRI demonstrated that TSTT decreased lesion volumes, and DTI further confirmed that TSTT preserved axonal microstructure of the sensorimotor cortex and internal capsule. Meanwhile, diffusion tensor tractography (DTT) showed that TSTT elevated correspondent density and length of fiber in the internal capsule. These MRI measurements were confirmed by histological examinations. Notably, TSTT significantly increased Ki67/NG2, Ki67/CNPase double-labeled cells along the boundary zone of ischemic cortex and striatum. Meanwhile, TSTT treatment up-regulated the phosphorylation level of Ser 9 in GSK-3β, and down-regulated phosphorylated β-catenin and CRMP-2 expression. CONCLUSION Taken together, our findings indicated that TSTT (65, 33 mg/kg) enhanced post-stroke functional recovery, amplified endogenous oligodendrogenesis and promoted axonal regeneration. The beneficial role of TSTT might be correlated with GSK-3/β-catenin/CRMP-2 modulating axonal reorganization after ischemic stroke.
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Affiliation(s)
- Le Yang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Chang-Yi Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Jun-Yao Ouyang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Man-Zhong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Yu Zhan
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Xue-Feng Feng
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Yun Lu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Ming-Cong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Jian-Feng Lei
- Medical Imaging laboratory of Core Facility Center, Capital Medical University, Beijing, 100069, China.
| | - Ting Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Lei Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Hai-Yan Zou
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
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Yu F, Huang T, Ran Y, Li D, Ye L, Tian G, Xi J, Liu Z. New Insights Into the Roles of Microglial Regulation in Brain Plasticity-Dependent Stroke Recovery. Front Cell Neurosci 2021; 15:727899. [PMID: 34421544 PMCID: PMC8374071 DOI: 10.3389/fncel.2021.727899] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 07/13/2021] [Indexed: 01/07/2023] Open
Abstract
Stroke remains the leading cause of long-term disability worldwide with significant long-term sequelae. However, there is no highly effective treatment to enhance post-stroke recovery despite extensive efforts in exploring rehabilitative therapies. Neurorehabilitation is recognized as the cornerstone of functional restoration therapy in stroke, where treatments are focused on neuroplastic regulation to reverse neural structural disruption and improve neurofunctional networks. Post-stroke neuroplasticity changes begin within hours of symptom onset and reaches a plateau by 3 to 4 weeks within the global brain in animal studies. It plays a determining role in spontaneous stroke recovery. Microglia are immediately activated following cerebral ischemia, which has been found both proximal to the primary ischemic injury and at the remote brain regions which have functional connections to the primary injury area. Microglia exhibit different activation profiles based on the microenvironment and adaptively switch their phenotypes in a spatiotemporal manner in response to brain injuries. Microglial activation coincides with neuroplasticity after stroke, which provides the fundamental base for the microglia-mediated inflammatory responses involved in the entire neural network rewiring and brain repair. Microglial activation exerts important effects on spontaneous recovery after stroke, including structural and functional reestablishment of neurovascular networks, neurogenesis, axonal remodeling, and blood vessel regeneration. In this review, we focus on the crosstalk between microglial activation and endogenous neuroplasticity, with a special focus on the plastic alterations in the whole brain network and their implications for structural and functional restoration after stroke. We then summarize recent advances in the impacts of microglial phenotype polarization on brain plasticity, trying to discuss the potential efficacy of microglia-based extrinsic restorative interventions in promoting post-stroke recovery.
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Affiliation(s)
- Fang Yu
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States.,Department of Anesthesiology, Westchester Medical Center, New York Medical College, Valhalla, NY, United States
| | - Tingting Huang
- Department of Anesthesiology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Da Li
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Lin Ye
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Guiqin Tian
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Jianing Xi
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Zongjian Liu
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
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