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Li M, Mo J, Wu D, He H, Hu P. Treadmill training improves neural function recovery in rats with spinal cord injury via JAK2/STAT3 signaling pathway and attenuating apoptosis. Neuroreport 2024:00001756-990000000-00265. [PMID: 38973489 DOI: 10.1097/wnr.0000000000002062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
To investigate the role of JAK2/STAT3 signaling pathway in neural function recovery in rats with spinal cord injury (SCI) after treadmill training. Sprague-Dawley rats were randomly divided into four groups: (a) sham group; (b) SCI group; (c) SCI+treadmill training group (SCI/TT); and (d) SCI/TT+AG490 group (a JAK2 inhibitor) ( n = 12). The 12 Sprague-Dawley rats in each group were randomly assigned into 1 st , 3 rd , 7 th , and 14 th day subgroups. The Basso-Beattie-Bresnahan (BBB) locomotor rating scale was used to assess the spinal cord function, and JAK2, STAT3, and IL-6 protein expressions in the rat spinal cord were evaluated by western blot. The level of cell apoptosis and expressions of apoptotic proteins were evaluated by TUNEL assay and immunohistochemistry, respectively. Rats in the SCI+TT group showed a significantly higher BBB score after SCI compared with the SCI group and the SCI/TT+AG490 group. Mechanistically, the JAK2/STAT3 signal pathway was immediately activated after SCI compared with sham group, and JAK2 and STAT3 were obviously upregulated when treadmill training was performed ( P < 0.05). Results of TUNEL assay showed that the apoptotic rate in SCI/TT was significantly lower than that in the SCI group and SCI/TT+AG490 group ( P < 0.05). Besides, the IL-6 expression in the SCI/TT group was significantly attenuated compared with the SCI group ( P < 0.05). Our results showed that physical treadmill training can enhance activation of JAK2/STAT3 signal pathway and attenuate apoptosis in the injured spinal cord, resulting in better functional recovery. These results underline the importance of synergistic treatment strategies for SCI.
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Affiliation(s)
- Meng Li
- Department of Hyperbaric Oxygen, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Jinfeng Mo
- Neurology Department, Affiliated Hospital of Guilin Medical University, Guilin Medical University, Guangxi
| | - Deguang Wu
- Department of Traumatic Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Haibo He
- Department of Traumatic Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Panyong Hu
- Department of Spinal Surgery, Affiliated Hospital of Guilin Medical University, Guilin Medical University, Guangxi, China
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Luo L, Wang Y, Tong J, Li L, Zhu Y, Jin M. Xenon postconditioning attenuates neuronal injury after spinal cord ischemia/reperfusion injury by targeting endoplasmic reticulum stress-associated apoptosis. Neurosurg Rev 2023; 46:213. [PMID: 37644159 DOI: 10.1007/s10143-023-02125-x] [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: 04/24/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 08/31/2023]
Abstract
The purpose of the study is to explore the underlying mechanisms of xenon (Xe) which protects against spinal cord ischemia/reperfusion injury (SCIRI). A SCIRI rat model was induced by abdominal artery occlusion for 85 min and reperfusion. Xe postconditioning (50% Xe) was administered 1 h after 1 h of reperfusion. At reperfusion time points (2, 4, 6, and 24 h), rats were treated with spinal cord scans by MRI to assess the time of peak spinal cord injury after SCIRI. Subsequently, endoplasmic reticulum (ER) stress inhibitor sodium 4-phenylbutyrate (4-PBA) was administered by daily intraperitoneal injection (50 mg/kg) for 5 days before SCIRI. At 4 h after reperfusion, motor function, immunofluorescence staining, hematoxylin and eosin (HE) staining, Nissl staining, TUNEL staining, real-time reverse transcription polymerase chain (RT-PCR) reaction, and western blot analyses were performed to investigate the protective effects of Xe against SCIRI. In the rat I/R model, spinal cord edema peaked at reperfusion 4 h. SCIRI activated ER stress, which was located in neurons. Xe postconditioning remarkably alleviated hind limb motor function, reduced neuronal apoptosis rate, increased the number of normal neurons, and inhibited the expression of ER stress-related protein in spinal cord. Furthermore, the administration of the ER stress inhibitor 4-PBA strongly decreased ER stress-induced apoptosis following SCIRI. Xe postconditioning inhibits ER stress activation, which contributes to alleviate SCIRI by suppressing neuronal apoptosis.
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Affiliation(s)
- Lan Luo
- Department of Anesthesiology, Capital Medical University Affiliated Beijing Friendship Hospital, 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Yuqing Wang
- Tsinghua Laboratory of Brain and Intelligence, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing, 100084, China
| | - Jiaqi Tong
- Department of Anesthesiology, Capital Medical University Affiliated Beijing Friendship Hospital, 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Lu Li
- Department of Anesthesiology, Capital Medical University Affiliated Beijing Friendship Hospital, 95 Yong-an Road, Xicheng District, Beijing, 100050, China
| | - Yanbing Zhu
- Beijing Clinical Research Institute, Capital Medical University Affiliated Beijing Friendship Hospital, 95 Yong-an Road, Xicheng District, Beijing, 100050, China.
| | - Mu Jin
- Department of Anesthesiology, Capital Medical University Affiliated Beijing Friendship Hospital, 95 Yong-an Road, Xicheng District, Beijing, 100050, China.
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Chen F, Wang D, Jiang Y, Ma H, Li X, Wang H. Dexmedetomidine postconditioning alleviates spinal cord ischemia-reperfusion injury in rats via inhibiting neutrophil infiltration, microglia activation, reactive gliosis and CXCL13/CXCR5 axis activation. Int J Neurosci 2023; 133:1-12. [PMID: 33499703 DOI: 10.1080/00207454.2021.1881089] [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] [Indexed: 01/27/2023]
Abstract
PURPOSE Spinal cord ischemia-reperfusion (I/R) injury is an unresolved complication and its mechanisms are still not completely understood. Here, we studied the neuroprotective effects of dexmedetomidine (DEX) postconditioning against spinal cord I/R injury in rats and explored the possible mechanisms. MATERIALS AND METHODS In the study, rats were randomly divided into five groups: sham group, I/R group, DEX0.5 group, DEX2.5 group, and DEX5 group. I/R injury was induced in experimental rats; 0.5 μg/kg, 2.5 μg/kg, 5 μg/kg DEX were intravenously injected upon reperfusion respectively. Neurological function, histological assessment, and the disruption of blood-spinal cord barrier (BSCB) were evaluated via the BBB scoring, hematoxylin and eosin staining, Evans Blue (EB) extravasation and spinal cord edema, respectively. Neutrophil infiltration was evaluated via Myeloperoxidase (MPO) activity. Microglia activation and reactive gliosis was evaluated via ionized calcium-binding adapter molecule-1(IBA-1) and glial fibrillary acidic protein (GFAP) immunofluorescence, respectively. The expression of C-X-C motif ligand 13 (CXCL13), C-X-C chemokine receptor type 5(CXCR5), caspase-3 was determined by western blotting. The expression levels of interleukin 6(IL-6), tumor necrosis factor-α(TNF-α), IL-1β were determined by ELISA assay. RESULTS DEX postconditioning preserved neurological assessment scores, improved histological assessment scores, attenuated BSCB leakage after spinal cord I/R injury. Neutrophil infiltration, microglia activation and reactive gliosis were also inhibited by DEX postconditioning. The expression of CXCL13, CXCR5, caspase-3, IL-6, TNF-α, IL-1β were reduced by DEX postconditioning. CONCLUSIONS DEX postconditioning alleviated spinal cord I/R injury, which might be mediated via inhibition of neutrophil infiltration, microglia activation, reactive gliosis and CXCL13/CXCR5 axis activation.
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Affiliation(s)
- Fengshou Chen
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Dan Wang
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Yanhua Jiang
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Hong Ma
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Xiaoqian Li
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - He Wang
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
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Sun S, Deng P, Mu L, Hu X, Guo S. Bionanoscale Recognition Underlies Cell Fate and Therapy. Adv Healthc Mater 2021; 10:e2101260. [PMID: 34523248 DOI: 10.1002/adhm.202101260] [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: 06/28/2021] [Revised: 08/21/2021] [Indexed: 11/09/2022]
Abstract
Understanding the bionanoscale recognition of nanostructured architectures is critical to the design and application of nanomaterials, but the related information is not well understood. In this study, it is found that bionanoscale recognition underlies cell fate and therapy. For example, 1T phase (octahedral coordination) monolayer MoS2 exhibits a markedly stronger affinity for fibronectin than the 2H structure (triangular prism coordination) and promotes cell spreading and differentiation. The van der Waals energy and increased turn components contribute to the high adhesion of fibronectin onto the 1T-MoS2 structure. 1T-MoS2 exhibits a significantly stronger affinity (KD , 6.59 × 10-7 m) for liposomes than 2H-MoS2 (1.21 × 10-6 m) due to strong hydrophobic interactions. The existence of octahedrally coordinated atomic structures that improve cell viability by enhancing the neurite length is first proven by random forest and structural equation models. Consequently, octahedral coordination disaggregates α-synuclein (e.g., by decreasing β-sheets and increasing coil structures) and protects cells and hosts against Parkinson's disease. As a proof-of-principle demonstration, these findings indicate that bionanoscale recognition underlies the design of biomaterials and cell therapeutics.
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Affiliation(s)
- Shan Sun
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 30080 China
| | - Peng Deng
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 30080 China
| | - Li Mu
- Tianjin Key Laboratory of Agro‐environment and Safe‐product Key Laboratory for Environmental Factors Control of Agro‐product Quality Safety (Ministry of Agriculture and Rural Affairs) Institute of Agro‐environmental Protection Ministry of Agriculture and Rural Affairs Tianjin 300191 China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 30080 China
| | - Shuqing Guo
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 30080 China
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Fu J, Mu G, Liu X, Ou C, Zhao J. Ischemic postconditioning reduces spinal cord ischemia-reperfusion injury through ATP-sensitive potassium channel. Spinal Cord 2021; 60:326-331. [PMID: 34616009 DOI: 10.1038/s41393-021-00714-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 09/17/2021] [Indexed: 11/09/2022]
Abstract
STUDY DESIGN Animal study. OBJECTIVES Explore the neuroprotective effect of remote limb ischemic postconditioning (Post C) in spinal cord ischemic reperfusion injury (SCII) and related mechanisms. SETTING Anesthesiology Laboratory of Southwest Medical University. METHODS We established a rabbit SCII model and processed it with Post C. To evaluate the neural function, spinal cord tissue was taken 48 h later, normal neurons were evaluated by HE staining, and the expression of ATP-sensitive potassium channel (KATP) marker molecule Kir6.2 was detected by Western blot. Immunofluorescence detection of spinal cord Iba-1 expression, ELISA detection of M1 type microglia marker iNOS and M2 type microglia marker Arg, and Western blot detection of NF-κB and IL-1β expression. Through these experiments, we will explore the protective effect of Post C in SCII, observe the changes in the protective effect after using KATP blockers, and verify that Post C can play a neuroprotective effect in SCII by activating KATP. RESULTS We observed that Post C significantly improved exercise ability and the number of spinal motor neurons in the SCII model. Microglia are activated and expression of M1 microglia in the spinal cord was decreased, while M2 was increased. This neuroprotective effect was reversed by the nonspecific KATP inhibitor. CONCLUSION Post C has a neuroprotective effect on SCII, and maybe a protective effect produced by activating KATP to regulate spinal microglia polarization and improve neuroinflammation.
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Affiliation(s)
- Jia Fu
- Department of Pain Management, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Guo Mu
- Department of Anesthesiology, Zigong Fourth People's Hospital, Zigong, China.
| | - Xiangbo Liu
- Department of Pain Management, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Cehua Ou
- Department of Pain Management, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jiaomei Zhao
- Department of Pain Management, Affiliated Hospital of Southwest Medical University, Luzhou, China.
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Sharma S, Madhyastha H, Laxmi Swetha K, Maravajjala KS, Singh A, Madhyastha R, Nakajima Y, Roy A. Development of an in-situ forming, self-healing scaffold for dermal wound healing: in-vitro and in-vivo studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112263. [PMID: 34474822 DOI: 10.1016/j.msec.2021.112263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/06/2021] [Accepted: 06/13/2021] [Indexed: 12/11/2022]
Abstract
The importance of the extra-cellular matrix (ECM) for wound healing has been extensively researched. Understanding its importance, multiple ECM mimetic scaffolds have been developed. However, the majority of such scaffolds are prefabricated. Due to their stiffness, prefabricated scaffolds cannot come into direct contact with the basal skin cells at the wound bed, limiting their efficacy. We have developed a unique wound dressing, using chitosan (CH) and chondroitin sulfate (CS), that can form a porous scaffold (CH-CS PEC) in-situ, at the wound site, by simple mixing of the polymer solutions. As CH is positively and CS is negatively charged, mixing these two polymer solutions would lead to electrostatic cross-linking between the polymers, converting them to a porous, viscoelastic scaffold. Owing to the in-situ formation, the scaffold can come in direct contact with the cells at the wound bed, supporting their proliferation and biofunction. In the present study, we confirmed the cross-linked scaffold formation by solid-state NMR, XRD, and TGA analysis. We have demonstrated that the scaffold had a high viscoelastic property, with self-healing capability. Both keratinocyte and fibroblast cells exhibited significantly increased migration and functional markers expression when grown on this scaffold. In the rat skin-excisional wound model, treatment with the in-situ forming CH-CS PEC exhibited enhanced wound healing efficacy. Altogether, this study demonstrated that mixing CH and CS solutions lead to the spontaneous formation of a highly viscoelastic, porous scaffold, which can support epidermal and dermal cell proliferation and bio-function, with an enhanced in-vivo wound healing efficacy.
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Affiliation(s)
- Swati Sharma
- Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Vidya Vihar, Rajasthan 333031, India
| | - Harishkumar Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, 8891692 Miyazaki, Japan.
| | - K Laxmi Swetha
- Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Vidya Vihar, Rajasthan 333031, India
| | - Kavya Sree Maravajjala
- Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Vidya Vihar, Rajasthan 333031, India
| | - Archana Singh
- CSIR Institute of Genomics and Integrative Biology (IGIB), New Delhi 110025, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Radha Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, 8891692 Miyazaki, Japan
| | - Yuichi Nakajima
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, 8891692 Miyazaki, Japan
| | - Aniruddha Roy
- Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Vidya Vihar, Rajasthan 333031, India.
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Phosphoglycerate Mutase 1 Prevents Neuronal Death from Ischemic Damage by Reducing Neuroinflammation in the Rabbit Spinal Cord. Int J Mol Sci 2020; 21:ijms21197425. [PMID: 33050051 PMCID: PMC7582635 DOI: 10.3390/ijms21197425] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/29/2020] [Accepted: 10/01/2020] [Indexed: 02/07/2023] Open
Abstract
Phosphoglycerate mutase 1 (PGAM1) is a glycolytic enzyme that increases glycolytic flux in the brain. In the present study, we examined the effects of PGAM1 in conditions of oxidative stress and ischemic damage in motor neuron-like (NSC34) cells and the rabbit spinal cord. A Tat-PGAM1 fusion protein was prepared to allow easy crossing of the blood-brain barrier, and Control-PGAM1 was synthesized without the Tat peptide protein transduction domain. Intracellular delivery of Tat-PGAM1, not Control-PGAM1, was achieved in a time- and concentration-dependent manner. Immunofluorescent staining confirmed the intracellular expression of Tat-PGAM1 in NSC34 cells. Tat-PGAM1, but not Control-PGAM1, significantly alleviated H2O2-induced oxidative stress, neuronal death, mitogen-activated protein kinase, and apoptosis-inducing factor expression in NSC34 cells. After ischemia induction in the spinal cord, Tat-PGAM1 treatment significantly improved ischemia-induced neurological impairments and ameliorated neuronal cell death in the ventral horn of the spinal cord 72 h after ischemia. Tat-PGAM1 treatment significantly mitigated the ischemia-induced increase in malondialdehyde and 8-iso-prostaglandin F2α production in the spinal cord. In addition, Tat-PGAM1, but not Control-PGAM1, significantly decreased microglial activation and secretion of pro-inflammatory cytokines, such as interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α induced by ischemia in the ventral horn of the spinal cord. These results suggest that Tat-PGAM1 can be used as a therapeutic agent to reduce spinal cord ischemia-induced neuronal damage by lowering the oxidative stress, microglial activation, and secretion of pro-inflammatory cytokines, such as IL-1β, IL-6, and TNF-α.
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Pan Z, Oh J, Huang L, Zeng Z, Duan P, Li Z, Yun Y, Kim J, Ha Y, Cao K. The combination of forskolin and VPA increases gene expression efficiency to the hypoxia/neuron-specific system. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:933. [PMID: 32953733 PMCID: PMC7475429 DOI: 10.21037/atm-20-3871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Spinal cord injury (SCI) tends to damage neural tissue and generate a hypoxic environment. Studies have confirmed that single therapy with gene or stem cells is inefficient, but research into combining stem cells and gene therapy in treating tissue damage has been undertaken to overcome the related limitations, which include low gene delivery efficiency and therapeutic outcome. Thus, a combination of stem cells, gene therapy, and a hypoxia-specific system may be useful for the reconstruction of SCI. Methods To synergistically treat SCI, a combined platform using a hypoxia/neuron-inducible gene expression system (HNIS) and human induced-neural stem cells (hiNSCs) produced by direct reprogramming was designed. Sox2- or nestin-positive hiNSCs were differentiated to Tuj1-, MAP2-, or NeuN-positive neurons. Results HNIS showed consistent hypoxia/neuron-specific gene expression in hiNSCs cultured under hypoxia. In particular, the HNIS-hiNSC combined platform revealed a complex pattern with higher gene expression compared with a single platform. In addition, we found that an optimal combination of small molecules, such as CHIR99021, valproic acid (VPA), glycogen synthase kinase-3β (GSK3β), and histone deacetylase (HDAC) inhibitors, could significantly enhance gene expression with HNIS-hiNSCs in the hypoxic environment. Conclusions This experiment demonstrated that HNIS-hiNSCs combined with GSK3 and HDAC inhibitors may present another promising strategy in the treatment of SCI.
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Affiliation(s)
- Zhimin Pan
- Spine Center, The Second Affiliated Hospital of Nanchang University, Nanchang, China.,Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.,Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jinsoo Oh
- Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Lu Huang
- Department of Child Health and Care, Jiangxi Maternal and Child Health Hospital, Nanchang, China
| | - Zhaoxun Zeng
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Pingguo Duan
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhiyun Li
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yeomin Yun
- Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Janghwan Kim
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Yoon Ha
- Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Kai Cao
- Spine Center, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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Zhang ZY, Fang YJ, Luo YJ, Lenahan C, Zhang JM, Chen S. The role of medical gas in stroke: an updated review. Med Gas Res 2020; 9:221-228. [PMID: 31898607 PMCID: PMC7802415 DOI: 10.4103/2045-9912.273960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Medical gas is a large class of bioactive gases used in clinical medicine and basic scientific research. At present, the role of medical gas in neuroprotection has received growing attention. Stroke is a leading cause of death and disability in adults worldwide, but current treatment is still very limited. The common pathological changes of these two types of stroke may include excitotoxicity, free radical release, inflammation, cell death, mitochondrial disorder, and blood-brain barrier disruption. In this review, we will discuss the pathological mechanisms of stroke and the role of two medical gases (hydrogen and hydrogen sulfide) in stroke, which may potentially provide a new insight into the treatment of stroke.
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Affiliation(s)
- Ze-Yu Zhang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Yuan-Jian Fang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Yu-Jie Luo
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Cameron Lenahan
- Burrell College of Osteopathic Medicine, Las Cruces, NM; Center for Neuroscience Research, School of Medicine, Loma Linda University, Loma Linda, CA, USA
| | - Jian-Ming Zhang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Sheng Chen
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
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Wang JL, Luo X, Liu L. Targeting CARD6 attenuates spinal cord injury (SCI) in mice through inhibiting apoptosis, inflammation and oxidative stress associated ROS production. Aging (Albany NY) 2019; 11:12213-12235. [PMID: 31841440 PMCID: PMC6949089 DOI: 10.18632/aging.102561] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/20/2019] [Indexed: 12/16/2022]
Abstract
Spinal cord injury (SCI) causes long-term and severe disability, influencing the quality of life and triggering serious socioeconomic consequences. Lack of effective pharmacotherapies for SCI is largely attributable to an incomplete understanding of its pathogenesis. Caspase recruitment domain family member 6 (CARD6) was initially suggested to be a protein playing significant role in NF-κB activation. However, the effects of CARD6 on SCI progression remain unknown. In this study, the wild type (CARD6+/+), CARD6 knockout (CARD6-/-) and CARD6 transgenic (TG) mice were subjected to a SCI model in vivo, and in vitro experiments were conducted by treating microglia cells with lipopolysaccharide (LPS). Here, we identified CARD6 as a suppressor of SCI in mice. CARD6 knockout significantly accelerated functional deficits, neuron death and glia activation, whereas CARD6 overexpression resulted in the opposite effects. Both in vivo and in vitro SCI models suggested that CARD6 knockout markedly promoted apoptosis by increasing Cyto-c release to cytosol from mitochondria and activating Caspase-3 signaling. In addition, CARD6 knockout mice exhibited stronger inflammatory response after SCI, as evidenced by the significantly elevated expression of pro-inflammatory cytokines TNF-α, IL-1β and IL-6, which was largely through enhancing the activation of NF-κB signaling.
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Affiliation(s)
- Jiang Lin Wang
- Department of Pain Management, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
| | - Xiao Luo
- Department of Pain Management, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
| | - Li Liu
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
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11
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Loers G, Liao Y, Hu C, Xue W, Shen H, Zhao W, Schachner M. Identification and characterization of synthetic chondroitin-4-sulfate binding peptides in neuronal functions. Sci Rep 2019; 9:1064. [PMID: 30705359 PMCID: PMC6355858 DOI: 10.1038/s41598-018-37685-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/28/2018] [Indexed: 02/05/2023] Open
Abstract
Chondroitin sulfate proteoglycans (CSPGs), up-regulated in and around the glial scar after mammalian spinal cord injury, have been suggested to be key inhibitory molecules for functional recovery by impeding axonal regrowth/sprouting and synaptic rearrangements. CSPG-mediated inhibition is mainly associated with the glycosaminoglycan chains of CSPGs, and chondroitin-4-sulfate (C4S) is the predominant sulfated structure that regulates axonal guidance and growth in the adult nervous system. With the aim to find molecules that neutralize the inhibitory functions of C4S, we screened a phage display library for peptides binding to C4S. From the phage clones binding to C4S we selected three peptides for further analysis. We observed that these peptides bind to C4S, but not chondroitin-6-sulfate, heparin sulfate or dermatan sulfate, in a concentration-dependent and saturable manner, whereas the scrambled peptides showed highly reduced or no binding to C4S. The C4S-binding peptides, but not their scrambled counterparts, when added to cultures of mouse cerebellar neurons and human neuroblastoma cells, neutralized the inhibitory functions of the C4S- and CSPG-coated substrate on cell adhesion, neuronal migration and neurite outgrowth. These results indicate that the C4S-binding peptides neutralize several inhibitory functions of CSPGs, suggesting that they may be beneficial in repairing mammalian nervous system injuries.
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Affiliation(s)
- Gabriele Loers
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
- Center for Molecular Neurobiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg, 20246, Germany
| | - Yonghong Liao
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Chengliang Hu
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Weikang Xue
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Huifan Shen
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Weijiang Zhao
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China.
| | - Melitta Schachner
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China.
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, 604 Allison Road, Piscataway, NJ, 08854, USA.
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