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Gu J, Cai X, Raza F, Zafar H, Chu B, Yuan H, Wang T, Wang J, Feng X. Preparation of a minocycline polymer micelle thermosensitive gel and its application in spinal cord injury. NANOSCALE ADVANCES 2024:d4na00625a. [PMID: 39355839 PMCID: PMC11440374 DOI: 10.1039/d4na00625a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2024] [Accepted: 09/15/2024] [Indexed: 10/03/2024]
Abstract
Neuroprotection is an important approach for the treatment of spinal cord injury (SCI). Minocycline (MC), a known neuroprotective agent, has been utilized for SCI treatment, but its therapeutic effect is limited by instability and low bioavailability. Herein, we developed an innovative micellar thermosensitive hydrogel (MCPP-M-gel) that encapsulates MC in polyethylene glycol (PEG)-poly(lactide-co-glycolic acid) (PLGA) micelles to enhance its therapeutic efficacy in a rat model of SCI. The micelles were synthesized via the thin-film hydration method and characterized for encapsulation efficiency, particle size, zeta potential, and polydispersity index (PDI). MCPP-M-gel demonstrated favorable physico-mechanical properties and extended MC release over 72 hours in vitro without cytotoxic effects on neural crest-derived ectoderm mesenchymal stem cells (EMSCs). Thereafter, MC, MCPP-M, MCPP-M-gel and a blank micellar thermosensitive gel were injected into the injured site of SCI rats. Histopathological evaluation demonstrated that MCPP-M-gel could promote neuronal regeneration at the injured site of the SC after 28 days. Immunofluorescence techniques revealed that MCPP-M-gel increased the expression of neuronal class III β-tubulin (Tuj1), myelin basic protein (MBP), growth-associated protein 43 (GAP43), neurofilament protein-200 (NF-200) and nestin as well as reduced glial-fibrillary acidic protein (GFAP) expression in damaged areas of the SC. In conclusion, this study innovatively developed MCPP-M-gel based on a PEG-PLGA copolymer as a biomaterial, laying a solid foundation for further research and application of MCPP-M-gel in SCI models or other neurodegenerative diseases.
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Affiliation(s)
- Jun Gu
- School of Medicine, Yangzhou University Yangzhou Jiangsu 225009 China
- Department of Orthopedics, Xishan People's Hospital Wuxi Jiangsu 204105 China
| | - Xiaohu Cai
- School of Medicine, Yangzhou University Yangzhou Jiangsu 225009 China
- Department of Rehabilitation, Xishan People's Hospital Wuxi Jiangsu 204105 China
| | - Faisal Raza
- School of Pharmacy, Shanghai Jiao Tong University Shanghai 200240 China
| | - Hajra Zafar
- School of Pharmacy, Shanghai Jiao Tong University Shanghai 200240 China
| | - Bo Chu
- Department of Orthopedics, Xishan People's Hospital Wuxi Jiangsu 204105 China
| | - Haitao Yuan
- Department of Orthopedics, Xishan People's Hospital Wuxi Jiangsu 204105 China
| | - Tianqi Wang
- Department of Orthopedics, Xishan People's Hospital Wuxi Jiangsu 204105 China
| | - Jiapeng Wang
- School of Pharmacy, Jiangsu University Zhenjiang Jiangsu 212013 China
| | - Xiaojun Feng
- School of Medicine, Yangzhou University Yangzhou Jiangsu 225009 China
- Department of Orthopedics, Xishan People's Hospital Wuxi Jiangsu 204105 China
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Bhattarai S, Subedi U, Manikandan S, Sharma S, Sharma P, Miller C, Bhuiyan MS, Kidambi S, Aidinis V, Sun H, Miriyala S, Panchatcharam M. Endothelial Specific Deletion of Autotaxin Improves Stroke Outcomes. Cells 2023; 12:511. [PMID: 36766854 PMCID: PMC9914107 DOI: 10.3390/cells12030511] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/20/2023] [Accepted: 01/31/2023] [Indexed: 02/09/2023] Open
Abstract
Autotaxin (ATX) is an extracellular secretory enzyme (lysophospholipase D) that catalyzes the hydrolysis of lysophosphatidyl choline to lysophosphatidic acid (LPA). The ATX-LPA axis is a well-known pathological mediator of liver fibrosis, metastasis in cancer, pulmonary fibrosis, atherosclerosis, and neurodegenerative diseases. Additionally, it is believed that LPA may cause vascular permeability. In ischemic stroke, vascular permeability leading to hemorrhagic transformation is a major limitation for therapies and an obstacle to stroke management. Therefore, in this study, we generated an endothelial-specific ATX deletion in mice (ERT2 ATX-/-) to observe stroke outcomes in a mouse stroke model to analyze the role of endothelial ATX. The AR2 probe and Evans Blue staining were used to perform the ATX activity and vascular permeability assays, respectively. Laser speckle imaging was used to observe the cerebral blood flow following stroke. In this study, we observed that stroke outcomes were alleviated with the endothelial deletion of ATX. Permeability and infarct volume were reduced in ERT2 ATX-/- mice compared to ischemia-reperfusion (I/R)-only mice. In addition, the cerebral blood flow was retained in ERT2 ATX-/- compared to I/R mice. The outcomes in the stroke model are alleviated due to the limited LPA concentration, reduced ATX concentration, and ATX activity in ERT2 ATX-/- mice. This study suggests that endothelial-specific ATX leads to increased LPA in the brain vasculature following ischemic-reperfusion and ultimately disrupts vascular permeability, resulting in adverse stroke outcomes.
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Affiliation(s)
- Susmita Bhattarai
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Utsab Subedi
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Shrivats Manikandan
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Sudha Sharma
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Papori Sharma
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Chloe Miller
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Md Shenuarin Bhuiyan
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Srivatsan Kidambi
- Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, NB 68588, USA
| | - Vassilis Aidinis
- Biomedical Sciences Research Center Alexander Fleming, 16672 Athens, Greece
| | - Hong Sun
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Sumitra Miriyala
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
| | - Manikandan Panchatcharam
- Department of Cellular Biology and Anatomy, Louisiana State University Health Sciences, Shreveport, LA 71103, USA
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Takagi Y, Nishikado S, Omi J, Aoki J. The Many Roles of Lysophospholipid Mediators and Japanese Contributions to This Field. Biol Pharm Bull 2022; 45:1008-1021. [DOI: 10.1248/bpb.b22-00304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yugo Takagi
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | - Shun Nishikado
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | - Jumpei Omi
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | - Junken Aoki
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo
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Neyama H, Nishiyori M, Cui Y, Watanabe Y, Ueda H. Lysophosphatidic acid receptor type-1 mediates brain activation in micro-Positron Emission Tomography analysis in a fibromyalgia-like mouse model. Eur J Neurosci 2022; 56:4224-4233. [PMID: 35666711 DOI: 10.1111/ejn.15729] [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: 11/15/2021] [Accepted: 05/30/2022] [Indexed: 11/26/2022]
Abstract
The intermittent cold stress-induced generalized pain response mimics the pathophysiological and pharmacotherapeutic features reported for fibromyalgia patients, including the presence of chronic generalized pain and female dominance. In addition, the intermittent cold stress-induced generalized pain is abolished in lysophosphatidic acid receptor type-1 knockout mice, as reported in many cases of neuropathic pain models. This study aimed to identify the brain loci involved in the intermittent cold stress generalized pain response and test their dependence on the lysophosphatidic acid receptor type-1. Positron emission tomography analyses using 2-deoxy-2-[18 F]fluoro-D-glucose in the presence of a pain stimulus showed that intermittent cold stress causes a significant increase in uptake in the ipsilateral regions, including the salience networking-related anterior cingulate cortex and insular cortex and the cognition-related hippocampus. A significant decrease was observed in the default mode network-related posterior cingulate cortex. Almost these intermittent cold stress-induced changes were abolished in lysophosphatidic acid receptor type-1 knockout mice. There results suggest that the intermittent cold stress-induced generalized pain response is mediated by the lysophosphatidic acid receptor type-1 in specific brain loci related to salience networking and cognition, which may lead to further developments in the treatment of fibromyalgia.
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Affiliation(s)
- Hiroyuki Neyama
- Department of Pharmacology and Therapeutic Innovation, Nagasaki University Institute of Biomedical Sciences, Nagasaki, Japan.,Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Michiko Nishiyori
- Department of Pharmacology and Therapeutic Innovation, Nagasaki University Institute of Biomedical Sciences, Nagasaki, Japan
| | - Yilong Cui
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yasuyoshi Watanabe
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Hiroshi Ueda
- Department of Pharmacology and Therapeutic Innovation, Nagasaki University Institute of Biomedical Sciences, Nagasaki, Japan.,Laboratory for the Study of Pain, Research Institute for Production Development, Kyoto, Japan
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