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Chen P, Li F, Wang G, Ying B, Chen C, Tian Y, Chen M, Lee KJ, Ying WB, Zhu J. Toward Highly Matching the Dura Mater: A Polyurethane Integrating Biocompatible, Leak-Proof, and Self-Healing Properties. Macromol Biosci 2023; 23:e2300111. [PMID: 37222304 DOI: 10.1002/mabi.202300111] [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: 03/16/2023] [Revised: 05/05/2023] [Indexed: 05/25/2023]
Abstract
The dura mater is the final barrier against cerebrospinal fluid leakage and plays a crucial role in protecting and supporting the brain and spinal cord. Head trauma, tumor resection and other traumas damage it, requiring artificial dura mater for repair. However, surgical tears are often unavoidable. To address these issues, the ideal artificial dura mater should have biocompatibility, anti-leakage, and self-healing properties. Herein, this work has used biocompatible polycaprolactone diol as the soft segment and introduced dynamic disulfide bonds into the hard segment, achieving a multifunctional polyurethane (LSPU-2), which integrated the above mentioned properties required in surgery. In particular, LSPU-2 matches the mechanical properties of the dura mater and the biocompatibility tests with neuronal cells demonstrate extremely low cytotoxicity and do not cause any negative skin lesions. In addition, the anti-leakage properties of the LSPU-2 are confirmed by the water permeability tester and the 900 mm H2 O static pressure test with artificial cerebrospinal fluid. Due to the disulfide bond exchange and molecular chain mobility, LSPU-2 could be completely self-healed within 115 min at human body temperature. Thus, LSPU-2 comprises one of the most promising potential artificial dura materials, which is essential for the advancement of artificial dura mater and brain surgery.
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Affiliation(s)
- Pandi Chen
- Department of Neurosurgery, the Affiliated Lihuili Hospital of Ningbo University, Ningbo, 315040, P. R. China
| | - Fenglong Li
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Guyue Wang
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Binbin Ying
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139-4307, USA
| | - Chao Chen
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ying Tian
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Maosong Chen
- Department of Neurosurgery, the Affiliated Lihuili Hospital of Ningbo University, Ningbo, 315040, P. R. China
| | - Kyung Jin Lee
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Yoo-Seong, 34134, Republic of Korea
| | - Wu Bin Ying
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Jin Zhu
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
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Möttönen J, Ponkilainen VT, Iverson GL, Luoto T, Mattila VM, Kuitunen I. Incidence of acute neurosurgery for traumatic brain injury in children-a nationwide analysis from 1998 to 2018. Acta Neurochir (Wien) 2023:10.1007/s00701-023-05628-0. [PMID: 37184636 DOI: 10.1007/s00701-023-05628-0] [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: 01/24/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023]
Abstract
BACKGROUND Most of moderate and severe pTBIs are managed conservatively, but in some cases neurosurgical interventions are needed. The incidence rates of acute pTBI neurosurgery vary considerably between countries and operation types. Our goal was to assess the incidence of acute pTBI neurosurgery in Finland. METHODS We conducted a retrospective Finnish register-based cohort study from 1998 to 2018. We included all patients that were 0 to 17 years of age at the time of the TBI. The incidence rates of patients with pTBI undergoing neurosurgery and the rates for specific operation types were calculated per 100,000 person-years. We compared the annual incidences with incidence rate ratios (IRR) with 95% confidence intervals (CI). We stratified patients to three age categories: (i) 0 to 3 years of age, (ii) 4 to 12 years of age, and (iii) 13 to 17 years of age. RESULTS The total number of neurosurgeries for acute pTBI during the study period was 386, and the cumulative incidence was 1.67 operations per 100,000 person-years. The cumulative incidence during the 21-year follow-up was highest at the age of 16 (IRR 4.78, CI 3.68 to 6.11). Boys had a 2.42-time higher cumulative incidence (IRR 2.35, CI 1.27 to 3.99) than girls (IRR 0.97, CI 0.35 to 2.20). The most common neurosurgery was an evacuation of an intracranial hemorrhage (n = 171; 44.3%). CONCLUSION The incidence of neurosurgeries for pTBIs has been stable from 1998 to 2018. The incidence was highest at the age of 16, and boys had higher incidence than girls.
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Affiliation(s)
- Julius Möttönen
- Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.
- Faculty of Medicine and Life Sciences, Tampere University, Tampere, Finland.
| | | | - Grant L Iverson
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA
- Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA
- Department of Physical Medicine and Rehabilitation, Schoen Adams Research Institute at Spaulding Rehabilitation, Charlestown, MA, USA
- Sports Concussion Program, Mass General Hospital for Children, Boston, MA, USA
| | - Teemu Luoto
- Faculty of Medicine and Life Sciences, Tampere University, Tampere, Finland
- Department of Neurosurgery, Tampere University Hospital, Tampere, Finland
| | - Ville M Mattila
- Faculty of Medicine and Life Sciences, Tampere University, Tampere, Finland
- Department of Orthopedics and Traumatology, Tampere University Hospital, Tampere, Finland
| | - Ilari Kuitunen
- Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
- Department of Pediatrics, Mikkeli Central Hospital, Mikkeli, Finland
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Bae SW, Lee MY. Incidence of Traumatic Brain Injury by Severity Among Work-Related Injured Workers From 2010 to 2019: An Analysis of Workers' Compensation Insurance Data in Korea. J Occup Environ Med 2022; 64:731-736. [PMID: 35673265 PMCID: PMC9426740 DOI: 10.1097/jom.0000000000002556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study aimed to investigate the status of work-related traumatic brain injury (wrTBI) in Korea between 2010 and 2019. METHODS This study used Korea Workers' Compensation Insurance data, and the sample comprised workers who claimed compensation for wrTBI from 2010 to 2019. The annual incidence of wrTBI was calculated as the rate per 100,000 workers. Time trends over the 10-year period were assessed using Poisson regression. RESULTS The mean incidence of wrTBI was 28.4/100,000. Regarding the incidence rate of wrTBI by severity, mild TBI and moderate-to-severe TBI were 12.9/100,000 and 15.5/100,000, respectively. The incidence of mild TBI among workers was higher in 2010, but moderate-to-severe TBI was higher after 2011. CONCLUSIONS Our findings highlight the need for providing information on mild TBI to workers as part of occupational safety and health education.
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Chen F, Chi J, Niu F, Gao Q, Mei F, Zhao L, Hu K, Zhao B, Ma B. Prevalence of suicidal ideation and suicide attempt among patients with traumatic brain injury: A meta-analysis. J Affect Disord 2022; 300:349-357. [PMID: 34995702 DOI: 10.1016/j.jad.2022.01.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 10/03/2021] [Accepted: 01/02/2022] [Indexed: 10/19/2022]
Abstract
BACKGROUND Suicidality is common among patients with traumatic brain injury (TBI). This meta-analysis aimed to assess the prevalence of suicidal ideation (SI) and suicide attempt (SA) in TBI patients. METHODS Databases including PubMed, Cochrane Library, Embase, CINAHL, Web of Science, PsycINFO, China National Knowledge Infrastructure (CNKI), VIP, WanFang Data, and Chinese Biomedical Literature Database (CBM) were searched for relevant literature from inception to 9th January 2021. Random effects models were used to estimate the prevalence of SI and SA. The methodological quality of the included studies was assessed using the modified Newcastle-Ottawa Scale. Subgroup analysis was performed based on the geographical location of the institutions. RESULTS A total of 16 studies involving 1,146,271 patients with TBI were included in our meta-analysis. The prevalence of SI and SA were 19.1% (95% CI 13.6-24.6%) and 2.1% (95% CI 1.8-2.4%), respectively, while the prevalence of SA in Asian and non-Asian countries were 2.0% (95% CI 0.3-3.7%) and 2.0% (95% CI 1.6-2.3%). Meta-regression analyses revealed that the publication year and age were positively associated, while the geographical location of the institution and sample size were negatively associated with the pooled prevalence of SI. On the other hand, the geographical location of the institution, sample size and age were negatively associated with the pooled prevalence of SA. LIMITATIONS The overall heterogeneity between studies was high. CONCLUSION SI and SA are common among TBI patients. Therefore, targeted preventive measures are paramount to manage TBI-related suicide.
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Affiliation(s)
- Fei Chen
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China; Evidence-based Medicine Center, School of Basic Medical Sciences, Lanzhou University, No.199, Donggang West Road, Chengguan District, Lanzhou, Gansu 730000, China
| | - Junting Chi
- The First People's Hospital of Yunnan Province, Kunming, China
| | - Fang Niu
- Department of Intensive Care Unit, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, China
| | - Qianqian Gao
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China
| | - Fan Mei
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China
| | - Li Zhao
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China
| | - Kaiyan Hu
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China
| | - Bing Zhao
- Evidence-based Medicine Center, School of Basic Medical Sciences, Lanzhou University, No.199, Donggang West Road, Chengguan District, Lanzhou, Gansu 730000, China
| | - Bin Ma
- Evidence-based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China; Evidence-based Medicine Center, School of Basic Medical Sciences, Lanzhou University, No.199, Donggang West Road, Chengguan District, Lanzhou, Gansu 730000, China.
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Xiong A, Xiong R, Yu J, Liu Y, Liu K, Jin G, Xu J, Yan J. Aquaporin-4 is a potential drug target for traumatic brain injury via aggravating the severity of brain edema. BURNS & TRAUMA 2021; 9:tkaa050. [PMID: 33748293 PMCID: PMC7957347 DOI: 10.1093/burnst/tkaa050] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/25/2020] [Indexed: 04/13/2023]
Abstract
BACKGROUND Traumatic brain edema (TBE) is caused by a specific water channel mediated by membrane aquaporins. Aquaporin-4 (AQP4) plays an especially important role in this process, but the relationship between AQP4 and TBE remains unclear. The purpose of this study was to explore expression of AQP4 in the hippocampus after traumatic brain injury (TBI), as well as the effect of brain edema on skeletal protein and its function in hippocampal neurons. METHODS The adult male Wistar rats we divided into a sham group and a TBI group, the latter of which was further divided into 1, 3, 6, 12, 24 and 72 hours (h) and 15 days (d) post injury subgroups. A proper TBI model was established, and brain edema was assessed in each group by water content. We measured the abundance of various proteins, including hypoxia inducible factor-1α (HIF-1α), AQP4, microtubule-associated protein 2 (MAP2), tau-5 protein, phosphorylated level of TAU, synaptophysin, cyclic adenosine monophosphate response element binding protein (CREB), phosphorylated CREB and general control nonrepressed 2, in each group. Hippocampal neurons and spatial memory test were analyzed in different time points. RESULTS Compared with that in the sham group, the level of AQP4 in hippocampal neurons began to significantly increase at 1 h post TBI and then decreased at 15 d post TBI. During this time frame, AQP4 level peaked at 12 and 72 h, and these peaks were closely correlated with high brain water content. HIF-1α displayed a similar trend. Conversely, levels of MAP2 began to decrease at 1 h post TBI and then increase at 15 d post TBI. In addition, the most severe brain edema in rats was found at 24 h post TBI, with neuronal loss and hippocampal dendritic spine injury. Compared to those in the sham group, rats in the TBI groups had significantly prolonged latency and significantly shortened exploration time. CONCLUSIONS AQP4 level was closely correlated with severity of brain edema, and abnormal levels thereof aggravated such severity after TBI.
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Affiliation(s)
- Ao Xiong
- Department of Orthopaedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450042, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
| | - Renping Xiong
- State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
| | - Jing Yu
- State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
| | - Yijia Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Ke Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing 400042, China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Ge Jin
- Department of Biochemistry and Molecular Biology, Basic Medical College of Zhengzhou University, Zhengzhou, Henan 450001, China
| | | | - Jun Yan
- Correspondence. Jianzhong Xu. ; Jun Yan,
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Tatara Y, Shimada R, Kibayashi K. Effects of Preexisting Diabetes Mellitus on the Severity of Traumatic Brain Injury. J Neurotrauma 2020; 38:886-902. [PMID: 32998635 DOI: 10.1089/neu.2020.7118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Falls and traffic accidents can cause traumatic brain injury (TBI). Assessment of the injury severity is essential to determine the prognosis or the cause of death. Diabetes mellitus (DM) is a common preexisting disease in elderly adults. We hypothesized that preexisting DM exacerbates TBI secondary to prolonged inflammation. In this study, we investigated TBI-induced changes in nerve function and inflammatory cell migration to the injury site, and the extent of brain contusion in KK-Ay (DM) and C57BL/6J (non-DM) mice. A controlled cortical impact device was used to induce TBI in each mouse. The brain contusion volume was measured using magnetic resonance imaging. Nerve function changes were assessed using the following animal behavior tasks: neurological severity score (NSS), Morris water maze, forced swim test, and beam walking. Immunohistochemical examinations of brain sections were performed to assess the infiltration of neutrophils, astrocytes, microglia, and macrophages, and to detect apoptosis. These experiments were performed on post-injury days 1-90 (over five experiments/time-points in each group). Compared with non-DM mice, DM mice showed significantly greater brain contusion volume, greater deterioration in the NSS, and a higher number of neutrophils, macrophages, and apoptotic cells in the brain tissue specimens. This study indicates that the prognosis of normal mice and DM mice differs, even if they acquire a TBI of the same severity. Therefore, it is important to evaluate patients with TBI for DM and other preexisting diseases in order to provide adequate treatment or to determine the correct cause of death.
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Affiliation(s)
- Yuki Tatara
- Department of Legal Medicine, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Ryo Shimada
- Department of Legal Medicine, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Kazuhiko Kibayashi
- Department of Legal Medicine, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan
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