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Liu M, Zhang W, Han S, Zhang D, Zhou X, Guo X, Chen H, Wang H, Jin L, Feng S, Wei Z. Multifunctional Conductive and Electrogenic Hydrogel Repaired Spinal Cord Injury via Immunoregulation and Enhancement of Neuronal Differentiation. Adv Mater 2024:e2313672. [PMID: 38308338 DOI: 10.1002/adma.202313672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/16/2024] [Indexed: 02/04/2024]
Abstract
Spinal cord injury (SCI) is a refractory neurological disorder. Due to the complex pathological processes, especially the secondary inflammatory cascade and the lack of intrinsic regenerative capacity, it is difficult to recover neurological function after SCI. Meanwhile, simulating the conductive microenvironment of the spinal cord reconstructs electrical neural signal transmission interrupted by SCI and facilitates neural repair. Therefore, a double-crosslinked conductive hydrogel (BP@Hydrogel) containing black phosphorus nanoplates (BP) is synthesized. When placed in a rotating magnetic field (RMF), the BP@Hydrogel can generate stable electrical signals and exhibit electrogenic characteristic. In vitro, the BP@Hydrogel shows satisfactory biocompatibility and can alleviate the activation of microglia. When placed in the RMF, it enhances the anti-inflammatory effects. Meanwhile, wireless electrical stimulation promotes the differentiation of neural stem cells (NSCs) into neurons, which is associated with the activation of the PI3K/AKT pathway. In vivo, the BP@Hydrogel is injectable and can elicit behavioral and electrophysiological recovery in complete transected SCI mice by alleviating the inflammation and facilitating endogenous NSCs to form functional neurons and synapses under the RMF. The present research develops a multifunctional conductive and electrogenic hydrogel for SCI repair by targeting multiple mechanisms including immunoregulation and enhancement of neuronal differentiation.
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Affiliation(s)
- Mingshan Liu
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Wencan Zhang
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Shuwei Han
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Dapeng Zhang
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Xiaolong Zhou
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Xianzheng Guo
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Haosheng Chen
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
| | - Haifeng Wang
- Department of Orthopaedics, The Second Hospital of Shandong University, No. 247 Beiyuan Street, Tianqiao District, Jinan, 250033, China
| | - Lin Jin
- International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, No. 6, Middle Section of Wenchang Avenue, Chuanhui District, Zhoukou, 466001, China
| | - Shiqing Feng
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
- Department of Orthopedics, Tianjin Medical University General Hospital, International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord Injury, No. 154 Anshan Road, Heping District, Tianjin, 300052, China
| | - Zhijian Wei
- Department of Orthopaedics, Qilu Hospital of Shandong University, Shandong University Centre for Orthopaedics, Advanced Medical Research Institute, Shandong University, No. 107 Wenhua West Road, Lixia District, Jinan, 250012, China
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Liu J, Wang B, Tai C, Wu L, Zhao H, Guan J, Chen L. An Effective Method to Detect Volatile Intermediates Generated in the Bioconversion of Coal to Methane by Gas Chromatography-Mass Spectrometry after In-Situ Extraction Using Headspace Solid-Phase Micro-Extraction under Strict Anaerobic Conditions. PLoS One 2016; 11:e0163949. [PMID: 27695055 PMCID: PMC5047463 DOI: 10.1371/journal.pone.0163949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 09/16/2016] [Indexed: 02/06/2023] Open
Abstract
Bioconversion of coal to methane has gained increased attention in recent decades because of its economic and environmental advantages. However, the mechanism of this process is difficult to study in depth, partly because of difficulties associated with the analysis of intermediates generated in coal bioconversion. In this investigation, we report on an effective method to analyze volatile intermediates generated in the bioconversion of coal under strict anaerobic conditions. We conduct in-situ extraction of intermediates using headspace solid-phase micro-extraction followed by detection by gas chromatography-mass spectrometry. Bioconversion simulation equipment was modified and combined with a solid-phase micro-extraction device. In-situ extraction could be achieved by using the combined units, to avoid a breakdown in anaerobic conditions and to maintain the experiment continuity. More than 30 intermediates were identified qualitatively in the conversion process, and the variation in trends of some typical intermediates has been discussed. Volatile organic acids (C2–C7) were chosen for a quantitative study of the intermediates because of their importance during coal bioconversion to methane. Fiber coating, extraction time, and solution acidity were optimized in the solid-phase micro-extraction procedure. The pressure was enhanced during the bioconversion process to investigate the influence of headspace pressure on analyte extraction. The detection limits of the method ranged from 0.0006 to 0.02 mmol/L for the volatile organic acids and the relative standard deviations were between 4.6% and 11.5%. The volatile organic acids (C2–C7) generated in the bioconversion process were 0.01–1.15 mmol/L with a recovery range from 80% to 105%. The developed method is useful for further in-depth research on the bioconversion of coal to methane.
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Affiliation(s)
- Jianmin Liu
- Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, China
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
| | - Baoyu Wang
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
| | - Chao Tai
- Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, China
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
- * E-mail:
| | - Li Wu
- Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, China
| | - Han Zhao
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
| | - Jiadong Guan
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
| | - Linyong Chen
- National Key Laboratory of Coal and Coal-bed Methane Simultaneous Extraction, Jincheng, China
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