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Xu J, Long H, Chen W, Cheng X, Yu H, Huang Y, Wang X, Li F. Ultrastructural Features of Neurovascular Units in a Rat Model of Chronic Compressive Spinal Cord Injury. Front Neuroanat 2018; 11:136. [PMID: 29375327 PMCID: PMC5767600 DOI: 10.3389/fnana.2017.00136] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 12/26/2017] [Indexed: 12/16/2022] Open
Abstract
Chronic spinal cord compression is the most common cause of spinal cord impairment worldwide. Objective of this study is to assess the ultrastructural features of the neurovascular unit (NVU) in a rat model of chronic compressive spinal cord injury, 24 SD rats were divided into two groups: the control group (n = 12), and the compression group (n = 12). A C6 semi-laminectomy was performed in the control group, whereas a water-absorbent polyurethane polymer was implanted into the C6 epidural space in the compression group. The Basso Beattie Bresnahan (BBB) scores and the somatosensory evoked potentials (SEP) were used to evaluate neurological functions. Transmission Electron Microscopy (TEM) was performed to investigate the change of NVU at the 28th day after modeling. Compared with the control group, the compression group shows a significant reduction (P < 0.05) of BBB score and a significant severity (P < 0.05) of abnormal SEP. TEM results of the compression group showed a striking increase in endothelial caveolae and vacuoles; a number of small spaces in tight junctions; a significant increase in pericyte processing area and vessel coverage; an expansion of the basement membrane region; swollen astrocyte endfeet and mitochondria; and the degeneration of neurons and axons. Our study revealed that damage to NVU components occurred followed by chronic compressive spinal cord injury. Several compensatory changes characterized by thicker endothelium, expansive BM, increased pericyte processing area and vessel coverage were also observed.
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Affiliation(s)
- Jinghui Xu
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Houqing Long
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Wenli Chen
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xing Cheng
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Haoyang Yu
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yangliang Huang
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaobo Wang
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Fobao Li
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
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Aufman J, Herrera GA. Circulating Monoclonal Light Chains and Acute Kidney Injury: The Role of the Renal Biopsy with Emphasis on Ultrastructural Evaluation in Assessing and Understanding Renal Injury. Ultrastruct Pathol 2015; 39:159-68. [DOI: 10.3109/01913123.2015.1013653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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