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Ukachukwu AEK, Nischal SA, Trillo-Ordonez Y, Nwaribe EE, Abu-Bonsrah N, Malomo TA, Oyemolade TA, Badejo OA, Deng DD, Still MEH, Oboh EC, Okere OE, Asemota I, Oboh EN, Ogundeji OD, Ugorji C, Rahman R, Reddy P, Seas A, Waguia-Kouam R, von Isenburg M, Fuller AT, Haglund MM, Adeleye AO. Epidemiological Burden of Neurotrauma in Nigeria: A Systematic Review and Pooled Analysis of 45,763 Patients. World Neurosurg 2024; 185:e99-e142. [PMID: 38741332 DOI: 10.1016/j.wneu.2023.11.070] [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: 06/13/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 05/16/2024]
Abstract
OBJECTIVE Neurotrauma is a significant cause of morbidity and mortality in Nigeria. We conducted this systematic review to generate nationally generalizable reference data for the country. METHODS Four research databases and gray literature sources were electronically searched. Risk of bias was assessed using the Risk of Bias in Non-Randomized Studies of Interventions and Cochrane's risk of bias tools. Descriptive analysis, narrative synthesis, and statistical analysis (via paired t-tests and χ2 independence tests) were performed on relevant article metrics (α = 0.05). RESULTS We identified a cohort of 45,763 patients from 254 articles. The overall risk of bias was moderate to high. Most articles employed retrospective cohort study designs (37.4%) and were published during the last 2 decades (81.89%). The cohort's average age was 32.5 years (standard deviation, 20.2) with a gender split of ∼3 males per female. Almost 90% of subjects were diagnosed with traumatic brain injury, with road traffic accidents (68.6%) being the greatest cause. Altered consciousness (48.4%) was the most commonly reported clinical feature. Computed tomography (53.5%) was the most commonly used imaging modality, with skull (25.7%) and vertebral fracture (14.1%) being the most common radiological findings for traumatic brain injury and traumatic spinal injury, respectively. Two-thirds of patients were treated nonoperatively. Outcomes were favorable in 63.7% of traumatic brain injury patients, but in only 20.9% of traumatic spinal injury patients. Pressure sores, infection, and motor deficits were the most commonly reported complications in the latter. CONCLUSIONS This systematic review and pooled analysis demonstrate the significant burden of neurotrauma across Nigeria.
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Affiliation(s)
- Alvan-Emeka K Ukachukwu
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA.
| | - Shiva A Nischal
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; University of Cambridge School of Clinical Medicine, Cambridge, UK
| | - Yesel Trillo-Ordonez
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | | | - Nancy Abu-Bonsrah
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, USA
| | - Toluyemi A Malomo
- Department of Neuroscience, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Oluwakemi A Badejo
- Department of Neurosurgery, University College Hospital, Ibadan, Nigeria
| | - Di D Deng
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Megan E H Still
- Department of Neurosurgery, University of Florida, Gainesville, Florida, USA
| | - Ena C Oboh
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | | | - Isaac Asemota
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Ehita N Oboh
- Michigan State University College of Human Medicine, Grand Rapids, Michigan, USA
| | - Olaniyi D Ogundeji
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Chiazam Ugorji
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Raphia Rahman
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Padmavathi Reddy
- University of Florida College of Medicine, Gainesville, Florida, USA
| | - Andreas Seas
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Duke University Pratt School of Engineering, Durham, North Carolina, USA; Duke University School of Medicine, Durham, North Carolina, USA
| | | | - Megan von Isenburg
- Duke University Medical Center Library and Archives, Durham, North Carolina, USA
| | - Anthony T Fuller
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA; Duke University Global Health Institute, Durham, North Carolina, USA
| | - Michael M Haglund
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA; Duke University Global Health Institute, Durham, North Carolina, USA
| | - Amos O Adeleye
- Department of Neurosurgery, University College Hospital, Ibadan, Nigeria
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Malomo TA, Nischal SA, Trillo-Ordonez Y, Oyemolade TA, Nwaribe EE, Okere OE, Deng DD, Abu-Bonsrah N, Oboh EC, Asemota I, Still MEH, Waguia-Kouam R, Seas A, Oboh EN, Ogundeji OD, Rahman R, Reddy P, Ugorji C, Badejo OA, von Isenburg M, Haglund MM, Fuller AT, Adeleye AO, Ukachukwu AEK. The Epidemiology of Spinal Neurosurgery in Nigeria: A Systematic Review and Patient-Level Analysis. World Neurosurg 2024; 185:e209-e242. [PMID: 38741326 DOI: 10.1016/j.wneu.2023.12.138] [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: 11/30/2023] [Accepted: 12/26/2023] [Indexed: 05/16/2024]
Abstract
OBJECTIVE Spinal pathologies are prevalent in Nigeria, though epidemiological data remains sparse. This systematic review used pooled patient-level data from across the country to generate a standardized epidemiological reference. METHODS Four research databases and gray literature sources were searched. Risk of bias assessment was conducted using Risk of Bias in Non-Randomised Studies - of Interventions and Cochrane's risk of bias tool. We descriptively analyzed all article metrics and statistically analyzed relevant data variables via paired t-test and χ2 independence tests (α = 0.05). RESULTS One hundred twenty-seven articles, comprising a patient cohort of 8425 patients, were analyzed. Most were retrospective cohort studies (46.5%) and case reports/series (31.5%), with an overall moderate-high risk of bias. Most studies were published in the last 20 years. Most patients were male (∼2.5 males per female), with an average age of 43.2 years (±16.4). Clinical diagnoses spanned the breadth of spinal neurosurgery. Approximately 45.0% of patients had complete spinal impairment. Pain (41.7%) was the most reported presenting feature. X-ray (45.1%) was the most common investigation used. Intervertebral disc herniation (18.9%) was the most prevalent imaging finding on MRI. Most patients were managed nonoperatively (57.8%), with a favorable outcome in 27.4% of patients. Posttreatment complications included pressure sores, infection, and motor deficits. CONCLUSIONS This systematic review and pooled analysis provide an epidemiological overview of spinal neurosurgery in Nigeria over the last 60 years and serves as a useful reference to direct future global research in this arena.
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Affiliation(s)
- Toluyemi A Malomo
- Department of Neuroscience, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shiva A Nischal
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Yesel Trillo-Ordonez
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | | | | | | | - Di D Deng
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Nancy Abu-Bonsrah
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, USA
| | - Ena C Oboh
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Isaac Asemota
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Megan E H Still
- Department of Neurosurgery, University of Florida, Gainesville, Florida, USA
| | | | - Andreas Seas
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Pratt School of Engineering, Duke University, Durham, North Carolina, USA; School of Medicine, Duke University, Durham, North Carolina, USA
| | - Ehita N Oboh
- College of Human Medicine, Michigan State University, Grand Rapids, Michigan, USA
| | - Olaniyi D Ogundeji
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Raphia Rahman
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Padmavathi Reddy
- College of Medicine, University of Florida, Gainesville, Florida, USA
| | - Chiazam Ugorji
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA
| | - Oluwakemi A Badejo
- Department of Neurosurgery, University College Hospital, Ibadan, Nigeria
| | - Megan von Isenburg
- Medical Center Library and Archives, Duke University, Durham, North Carolina, USA
| | - Michael M Haglund
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA; Global Health Institute, Duke University, Durham, North Carolina, USA
| | - Anthony T Fuller
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA; Global Health Institute, Duke University, Durham, North Carolina, USA
| | - Amos O Adeleye
- Department of Neurosurgery, University College Hospital, Ibadan, Nigeria
| | - Alvan-Emeka K Ukachukwu
- Division of Global Neurosurgery and Neurology, Duke University, Durham, North Carolina, USA; Department of Neurosurgery, Duke University Health System, Durham, North Carolina, USA.
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Jesuyajolu D, Ayantayo T, Oyesiji E, Bakare S, Madeleine O, Adewale O, Zubair A, Ekennia-Ebeh J, Morgan E. Burden of Traumatic Spinal Cord Injury in Sub-Saharan Africa: A Scoping Review. World Neurosurg 2023; 179:216-221.e2. [PMID: 37648200 DOI: 10.1016/j.wneu.2023.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/01/2023]
Abstract
INTRODUCTION With a varying annual incidence across populations, traumatic spinal cord injury (TSCI) remains a public health concern of utmost importance, especially in developing countries with an incidence rate ranging from 12.7 to 29.7 per million people and a postulated increase in the number of patients living with undesirable complications of this condition. It is against this background that we reviewed the literature to bring to light the epidemiology, burden, management, and outcomes of TSCIs across Africa. METHODS The Preferred Reporting Items for Systematic Reviews and Meta-Analyses was used in this study. We included descriptive studies with data on the incidence, presentation, management, and outcomes of TSCIs in African surgical centers. We conducted our search on PubMed and OVID Embase and supplemented it with an extensive review of African Journal Online and Google Scholar. RESULTS Thirteen papers were identified from our search. Most papers were from Nigeria (n = 4) and Tanzania (n = 3). In total, our review included 1332 persons across the different centers. There were more males than females (n = 1029/1332, 72%). The most common etiology was road traffic accidents, constituting 44%, while falls and other mechanisms like assault and sports injuries had 28% each. The incidence of TSCI varied from 13 per million population per year in Botswana to 75.6 per million population per year in South Africa. CONCLUSIONS The incidence of the traumatic condition in certain parts of Africa is significantly higher than in other parts of the world, suggesting the need for an urgent call to action regarding addressing its key drivers.
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Affiliation(s)
- Damilola Jesuyajolu
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria.
| | - Temitayo Ayantayo
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Emmanuel Oyesiji
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Sofia Bakare
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Okere Madeleine
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Olaniyan Adewale
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Abdulahi Zubair
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Jamike Ekennia-Ebeh
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
| | - Eghosa Morgan
- Department of Neurosurgery, Surgery Interest Group of Africa, Lagos, Nigeria
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4
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Aderinto N, Abdulbasit MO, Olatunji D. Stem cell-based combinatorial therapies for spinal cord injury: a narrative review of current research and future directions. Ann Med Surg (Lond) 2023; 85:3943-3954. [PMID: 37554849 PMCID: PMC10406006 DOI: 10.1097/ms9.0000000000001034] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 06/22/2023] [Indexed: 08/10/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating condition that can result in lifelong disability. Despite significant progress in SCI research, current treatments only offer limited functional recovery. Stem cell-based combinatorial therapies have emerged promising to enhance neural repair and regeneration after SCI. Combining stem cells with growth factors, biomaterials, and other therapeutic agents can improve outcomes by providing a multifaceted approach to neural repair. However, several challenges must be addressed before these therapies can be widely adopted in clinical practice. Standardisation of stem cell isolation, characterisation, and production protocols ensures consistency and safety in clinical trials. Developing appropriate animal models that accurately mimic human SCI is crucial for successfully translating these therapies. Additionally, optimal delivery methods and biomaterials that support the survival and integration of stem cells into injured tissue must be identified. Despite these challenges, stem cell-based combinatorial therapies for SCI hold great promise. Innovative approaches such as gene editing and the use of neural tissue engineering may further enhance the efficacy of these therapies. Further research and development in this area are critical to advancing the field and providing effective therapies for SCI patients. This paper discusses the current evidence and challenges from the literature on the potential of stem cell-based combinatorial therapies for SCI.
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Affiliation(s)
- Nicholas Aderinto
- Department of Medicine and Surgery, Ladoke Akintola University of Technology, Ogbomoso
| | | | - Deji Olatunji
- Department of Medicine and Surgery, University of Ilorin, Ilorin, Nigeria
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5
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Azad TD, Nair SK, Kalluri AL, Materi J, Ahmed AK, Khalifeh J, Abu-Bonsrah N, Sharwood LN, Sterner RC, Brooks NP, Alomari S, Musharbash FN, Mo K, Lubelski D, Witham TF, Theodore N, Bydon A. Delays in Presentation After Traumatic Spinal Cord Injury-A Systematic Review. World Neurosurg 2023; 169:e121-e130. [PMID: 36441093 DOI: 10.1016/j.wneu.2022.10.086] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Prompt surgical decompression after traumatic spinal cord injury (TSCI) may be associated with improved sensorimotor outcomes. Delays in presentation may prevent timely decompression after TSCI. OBJECTIVE To systematically review existing studies investigating delays in presentation after TSCI in low- and middle-income countries (LMICs) and high-income countries (HICs). METHODS A systematic review was conducted and studies featuring quantitative or qualitative data on prehospital delays in TSCI presentation were included. Studies lacking quantitative or qualitative data on prehospital delays in TSCI presentation, case reports or series with <5 patients, review articles, or animal studies were excluded from our analysis. RESULTS After exclusion criteria were applied, 24 studies were retained, most of which were retrospective. Eleven studies were from LMICs and 13 were from HICs. Patients with TSCI in LMICs were younger than those in HICs, and most patients were male in both groups. A greater proportion of patients with TSCI in studies from LMICs presented >24 hours after injury (HIC average proportion, 12.0%; LMIC average proportion, 49.9%; P = 0.01). Financial barriers, lack of patient awareness and education, and prehospital transportation barriers were more often cited as reasons for delays in LMICs than in HICs, with prehospital transportation barriers cited as a reason for delay by every LMIC study included in this review. CONCLUSIONS Disparities in prehospital infrastructure between HICs and LMICs subject more patients in LMICs to increased delays in presentation to care.
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Affiliation(s)
- Tej D Azad
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Sumil K Nair
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Anita L Kalluri
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Joshua Materi
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - A Karim Ahmed
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Jawad Khalifeh
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Nancy Abu-Bonsrah
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA; Research Department, Association of Future African Neurosurgeons, Yaounde, Cameroon
| | - Lisa N Sharwood
- John Walsh Centre for Rehabilitation Research, Kolling Institute, Sydney Medical School-Northern, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Robert C Sterner
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Nathaniel P Brooks
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Safwan Alomari
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Farah N Musharbash
- Department of Orthopedic Surgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Kevin Mo
- Department of Orthopedic Surgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Daniel Lubelski
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Timothy F Witham
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Nicholas Theodore
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Ali Bydon
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA.
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6
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Yang X, Cao JF, Chen S, Xiong L, Zhang L, Wu M, Wang C, Xu H, Chen Y, Yang S, Zhong L, Wei X, Xiao Z, Gong Y, Li Y, Zhang X. Molecular docking and molecular dynamics simulation study the mechanism of progesterone in the treatment of spinal cord injury. Steroids 2022; 188:109131. [PMID: 36273543 DOI: 10.1016/j.steroids.2022.109131] [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: 04/23/2022] [Revised: 09/10/2022] [Accepted: 10/14/2022] [Indexed: 11/08/2022]
Abstract
PURPOSE Spinal cord injury can lead to incomplete or complete loss of voluntary movement and sensory function, leading to serious complications. Numerous studies have shown that progesterone exhibits strong therapeutic potential for spinal cord injury. However, the mechanism by which progesterone treats spinal cord injury remains unclear. Therefore, this article explores the mechanism of progesterone in the treatment of spinal cord injury by means of molecular docking and molecular dynamics simulation. METHODS We used bioinformatics to screen active pharmaceutical ingredients and potential targets, and molecular docking and molecular dynamics were used to validate and analysis by the supercomputer platform. RESULTS Progesterone had 3606 gene targets, spinal cord injury had 6560 gene targets, the intersection gene targets were 2355. GO and KEGG analysis showed that the abundant pathways involved multiple pathways related to cell metabolism and inflammation. Molecular docking showed that progesterone played a role in treating spinal cord injury by acting on BDNF, AR, NGF and TNF. Molecular dynamics was used to prove and analyzed the binding stability of active ingredients and protein targets, and AR/Progesterone combination has the strongest binding energy. CONCLUSION Progesterone promotes recovery from spinal cord injury by promoting axonal regeneration, remyelination, neuronal survival and reducing inflammation.
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Affiliation(s)
- Xingyu Yang
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Jun-Feng Cao
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Shengyan Chen
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Li Xiong
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | | | - Mei Wu
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Chaochao Wang
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Hengxiang Xu
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Yijun Chen
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Siqi Yang
- Clinical Medicine, Chengdu Medical College, Chengdu, China
| | - Li Zhong
- Center for Experimental Technology of Preclinical Medicine, Chengdu Medical College, Chengdu, China
| | - Xiaoliang Wei
- Center for Experimental Technology of Preclinical Medicine, Chengdu Medical College, Chengdu, China
| | - Zixuan Xiao
- Laboratory Medicine, Chengdu Medical College, Chengdu, China
| | - Yunli Gong
- Laboratory Medicine, Chengdu Medical College, Chengdu, China
| | - Yang Li
- Laboratory Medicine, Chengdu Medical College, Chengdu, China
| | - Xiao Zhang
- Center for Experimental Technology of Preclinical Medicine, Chengdu Medical College, Chengdu, China
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7
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Codelivery of minocycline hydrochloride and dextran sulfate via bionic liposomes for the treatment of spinal cord injury. Int J Pharm 2022; 628:122285. [DOI: 10.1016/j.ijpharm.2022.122285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 09/03/2022] [Accepted: 10/07/2022] [Indexed: 11/21/2022]
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Ma Y, Li P, Ju C, Zuo X, Li X, Ding T, Liang Z, Zhang J, Li K, Wang X, Zhu Z, Zhang Z, Song Z, Quan H, Hu X, Wang Z. Photobiomodulation Attenuates Neurotoxic Polarization of Macrophages by Inhibiting the Notch1-HIF-1α/NF-κB Signalling Pathway in Mice With Spinal Cord Injury. Front Immunol 2022; 13:816952. [PMID: 35371065 PMCID: PMC8968029 DOI: 10.3389/fimmu.2022.816952] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/22/2022] [Indexed: 12/28/2022] Open
Abstract
Spinal cord injury (SCI) is a catastrophic disease with a complex pathogenesis that includes inflammation, oxidative stress, and glial scar formation. Macrophages are the main mediators of the inflammatory response and are distributed in the epicentre of the SCI. Macrophages have neurotoxic and neuroprotective phenotypes (also known as classically and alternatively activated macrophages or M1 and M2 macrophages) that are associated with pro- or anti- inflammatory gene expression. Our previous study demonstrated that photobiomodulation (PBM) alters the polarization state of macrophages in the SCI region towards the M2 phenotype and promotes the recovery of motor function in rats with SCI. However, the mechanism by which PBM promotes SCI repair remains largely undefined. This study is based on the replacement of conventional percutaneous irradiation with implantable biofibre optic in vivo irradiation. The aim was to further investigate the effects of PBM on SCI in mice under new irradiation patterns and its potential mechanisms of action. PBM was administered to male mice with clamped SCI for four consecutive weeks and significantly promoted the recovery of motor function in mice. Analysis of the macrophage phenotypes in the epicentre of the SCI in mice showed that PBM mainly inhibited the neurotoxic activation of macrophages in the SCI area and reduced the secretion of inflammatory factors such as IL-1α and IL-6; PBM had no effect on M2 macrophages. Immediately afterwards, we constructed in vitro models of the inflammatory polarization of macrophages and PBM intervention. We found that PBM attenuated the neurotoxicity of M1 macrophages on VSC 4.1 motor neurons and dorsal root ganglion (DRG) neurons. The effects of PBM on neurotoxic macrophages and the possible mechanisms of action were analysed using RNA sequencing (RNA-seq), which confirmed that the main role of PBM was to modulate the inflammatory response and immune system processes. Analysis of the differentially expressed genes (DEGs) associated with the inflammatory response showed that PBM had the most significant regulatory effects on genes such as interleukin (IL)-1α, IL-6, cyclooxygenase-2 (COX-2), and inducible nitric oxide synthase (iNOS) and had obvious inhibitory effects on inflammation-related Notch1 and hypoxia-inducible factor-1α (HIF-1α) pathway genes. RNA-seq analysis of the effect of PBM on gene expression in resting-state macrophages and M2 macrophages did not show significant differences (data not shown). In conclusion, PBM promoted better motor recovery after SCI in mice by inhibiting the neurotoxic polarization of macrophages and the release of inflammatory mediators by acting on the Notch1-HIF-1α/NF-κB Signalling Pathway.
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Affiliation(s)
- Yangguang Ma
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Penghui Li
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Cheng Ju
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Xiaoshuang Zuo
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Xin Li
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- Department of Orthopaedics, 967 Hospital of People’s Liberation Army Joint Logistic Support Force, Dalian, China
| | - Tan Ding
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Zhuowen Liang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Jiawei Zhang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Kun Li
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Xuankang Wang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Zhijie Zhu
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Zhihao Zhang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Zhiwen Song
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Huilin Quan
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Xueyu Hu
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- *Correspondence: Xueyu Hu, ; Zhe Wang,
| | - Zhe Wang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- *Correspondence: Xueyu Hu, ; Zhe Wang,
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9
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Liu X, Jiang X, Yu Q, Shen W, Tian H, Mei X, Wu C. Sodium alginate and Naloxone loaded macrophage-derived nanovesicles for the treatment of spinal cord injury. Asian J Pharm Sci 2021; 17:87-101. [PMID: 35261646 PMCID: PMC8888181 DOI: 10.1016/j.ajps.2021.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 11/06/2021] [Accepted: 11/09/2021] [Indexed: 12/18/2022] Open
Abstract
Spinal cord injury (SCI) causes Ca2+ overload, which can lead to inflammation and neuronal apoptosis. In this study, we prepared a nanovesicle derived from macrophage membrane (MVs), which encapsulated sodium alginate (SA) and naloxone (NAL) to inhibit inflammation and protect neurons by reducing the free Ca2+concentration at the SCI site. Based on the transmission electron microscopy (TEM) image, the encapsulated sample (NAL–SA–MVs) had a particle size of approximately 134 ± 11 nm and exhibited a sustained release effect. The encapsulation rate of NAL and SA was 82.07% ± 3.27% and 72.13% ± 2.61% in NAL–SA–MVs, respectively. Targeting tests showed that the NAL–SA–MVs could accumulate in large quantities and enhance the concentration of SA and NAL at the lesion sites. In vivo and in vitro studies indicated that the NAL–SA–MVs could decrease the concentration of free Ca2+, which should further alleviate the inflammatory response and neuronal apoptosis. Anti-inflammation results demonstrated that the NAL–SA–MVs could reduce the pro-inflammation factors (iNOS, TNF-α, IL-1β, IL-6) and increase the expression of anti-inflammation factors (IL-10) at the cell and animal level. Concurrently, fluorescence, flow cytometry and western blot characterization showed that the apoptotic condition of the neurons was significantly inhibited. In addition, the motor function of C57 mice were significantly improved after NAL–SA–MVs treatment. In conclusion, it is suggested that the NAL–SA–MVs has tremendous potential in the treatment of SCI.
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Affiliation(s)
- Xiaoyao Liu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Xue Jiang
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Qi Yu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Wenwen Shen
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - He Tian
- Department of Histology and Embryology, Jinzhou Medical University, Jinzhou 121001, China
| | - Xifan Mei
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121004, China
- Corresponding author.
| | - Chao Wu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
- Corresponding author.
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