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Liu K, Yan S, Liu Y, Liu J, Li R, Zhao L, Liu B. Conductive and alignment-optimized porous fiber conduits with electrical stimulation for peripheral nerve regeneration. Mater Today Bio 2024; 26:101064. [PMID: 38698883 PMCID: PMC11063606 DOI: 10.1016/j.mtbio.2024.101064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/04/2024] [Accepted: 04/15/2024] [Indexed: 05/05/2024] Open
Abstract
Autologous nerve transplantation (ANT) is currently considered the gold standard for treating long-distance peripheral nerve defects. However, several challenges associated with ANT, such as limited availability of donors, donor site injury, mismatched nerve diameters, and local neuroma formation, remain unresolved. To address these issues comprehensively, we have developed porous poly(lactic-co-glycolic acid) (PLGA) electrospinning fiber nerve guide conduits (NGCs) that are optimized in terms of alignment and conductive coating to facilitate peripheral nerve regeneration (PNR) under electrical stimulation (ES). The physicochemical and biological properties of aligned porous PLGA fibers and poly(3,4-ethylenedioxythiophene):polystyrene sodium sulfonate (PEDOT:PSS) coatings were characterized through assessments of electrical conductivity, surface morphology, mechanical properties, hydrophilicity, and cell proliferation. Material degradation experiments demonstrated the biocompatibility in vivo of electrospinning fiber films with conductive coatings. The conductive NGCs combined with ES effectively facilitated nerve regeneration. The designed porous aligned NGCs with conductive coatings exhibited suitable physicochemical properties and excellent biocompatibility, thereby significantly enhancing PNR when combined with ES. This combination of porous aligned NGCs with conductive coatings and ES holds great promise for applications in the field of PNR.
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Affiliation(s)
- Kai Liu
- Department of Hand and Foot Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, 130021, China
- Engineering Laboratory of Tissue Engineering Biomaterials of Jilin Province, Changchun, 130021, China
| | - Shuai Yan
- Department of Operating Room, The First Hospital of Jilin University, Changchun, 130021, China
| | - Yao Liu
- Engineering Laboratory of Tissue Engineering Biomaterials of Jilin Province, Changchun, 130021, China
- Department of Sport Medicine, Orthopedics Center, First Hospital of Jilin University, Changchun, 130021, China
| | - Jianfeng Liu
- Department of Hand and Foot Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, 130021, China
- Engineering Laboratory of Tissue Engineering Biomaterials of Jilin Province, Changchun, 130021, China
| | - Ruijun Li
- Department of Hand and Foot Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, 130021, China
- Engineering Laboratory of Tissue Engineering Biomaterials of Jilin Province, Changchun, 130021, China
| | - Lirong Zhao
- Department of Ultrasound, The First Hospital of Jilin University, Changchun, 130021, China
| | - Bin Liu
- Department of Hand and Foot Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, 130021, China
- Engineering Laboratory of Tissue Engineering Biomaterials of Jilin Province, Changchun, 130021, China
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Jia Q, Lou Y, Chen D, Li X, Liu Y, Chu R, Wang T, Zhou Z, Li D, Wan W, Huang Q, Yang X, Wang T, Wu Z, Xiao J. Long-term postoperative outcomes of spinal cellular schwannoma: study of 93 consecutive cases. Spine J 2024; 24:858-866. [PMID: 38272127 DOI: 10.1016/j.spinee.2024.01.006] [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: 08/09/2023] [Revised: 01/03/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
BACKGROUND CONTEXT Cellular schwannoma (CS) is a rare tumor that accounts for 2.8%-5.2% of all benign schwannomas. There is a dearth of up-to-date information on spinal CS in the literature. PURPOSE The aims of this study were to identify the proportion of CS cases amongst spinal benign schwannoma, describe the clinical features of spinal CS, and identify prognostic factors for local recurrence by analyzing data from 93 consecutive CS cases. STUDY DESIGN Retrospective review. PATIENT SAMPLE We analyzed 93 PSGCT screened from 1,706 patients with spine CS who were treated at our institute between 2008 and 2021. OUTCOME MEASURES Demographic, radiographic, operative and postoperative data were recorded and analyzed. METHODS We compared the clinical features of spinal CS from the cervical, thoracic, lumbar and sacral segments. Prognostic factors for local recurrence-free survival (RFS) were identified by the Kaplan-Meier method. Factors with p≤.05 in univariate analysis were subjected to multivariate analysis by Cox regression analysis. RESULTS The proportion of spinal CS in all benign schwannomas was 6.7%. The mean and median follow-up times for the 93 patients in this study were 92.2 and 91.0 months respectively (range 36-182 months). Local recurrence was detected in 11 cases, giving an overall recurrence rate of 11.7%, with one patient death. Statistical analysis revealed that tumor size ≥5 cm, intralesional resection, and Ki-67 ≥5% were independent negative prognostic factors for RFS in spinal CS. CONCLUSIONS Whenever possible, en bloc resection is recommended for spinal CS. Long-term follow-up should be carried out for patients with tumor size ≥5 cm and postoperative pathological Ki-67 ≥5%.
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Affiliation(s)
- Qi Jia
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Yan Lou
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Dingbang Chen
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Xiaolin Li
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Yiqian Liu
- Department of Medical Center, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Ruitong Chu
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Ting Wang
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Zhenhua Zhou
- Department of Medical Center, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Dong Li
- Department of General Surgery, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Wei Wan
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Quan Huang
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Xinghai Yang
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Tao Wang
- Department of Orthopedics, The second affiliated hospital of Anhui Medical University, No.678 Furong Road, Jingkai district, Hefei, Anhui provice, China
| | - Zhipeng Wu
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China
| | - Jianru Xiao
- Department of Orthopedic Oncology, Changzheng Hospital, Naval Medical University, Shanghai, China.
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