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Acetyl-11-keto-beta-boswellic acid promotes sciatic nerve repair after injury: molecular mechanism

Neural Regeneration Research 2022年第12期17卷 2778-2784页

作者： Yao Wang Zong-Liang Xiong Xiang-Lin Ma Chong Zhou Mo-Han Huo Xiao-Wen Jiang Wen-Hui Yu Department of Veterinary Medicine Northeast Agricultural UniversityHarbinHeilongjiang ProvinceChina College of Life Sciences Northeast Agricultural UniversityHarbinHeilongjiang ProvinceChina Key Laboratory of Heilongjiang Education Department for Common Animal Disease Prevention and Treatment Northeast Agricultural UniversityHarbinHeilongjiang ProvinceChina Institute of Chinese Veterinary Medicine Northeast Agricultural UniversityHarbinHeilongjiang ProvinceChina

Previous studies showed that acetyl-11-keto-beta-boswellic acid(AKBA),the active ingredient in the natural Chinese medicine Boswellia,can stimulate sciatic nerve injury repair via promoting Schwann cell proliferation.However,the underlying molecular mechanism remains poorly understood.In this study,we performed genomic sequencing in a rat model of sciatic nerve crush injury after gastric AKBA administration for 30 days.We found that the phagosome pathway was related to AKBA treatment,and brain-derived neurotrophic factor expression in the neurotrophic factor signaling pathway was also highly up-regulated.We further investigated gene and protein expression changes in the phagosome pathway and neurotrophic factor signaling pathway.Myeloperoxidase expression in the phagosome pathway was markedly decreased,and brain-derived neurotrophic factor,nerve growth factor,and nerve growth factor receptor expression levels in the neurotrophic factor signaling pathway were greatly increased.Additionally,expression levels of the inflammatory factors CD68,interleukin-1β,pro-interleukin-1β,and tumor necrosis factor-αwere also decreased.Myelin basic protein-andβ3-tubulin-positive expression as well as the axon diameter-to-total nerve diameter ratio in the injured sciatic nerve were also increased.These findings suggest that,at the molecular level,AKBA can increase neurotrophic factor expression through inhibiting myeloperoxidase expression and reducing inflammatory reactions,which could promote myelin sheath and axon regeneration in the injured sciatic nerve.

关键词： AKBA axon genomics inflammatory injury and repair myelin sheath myeloperoxidase neurotrophic factor peripheral nerve phagosome pathway regeneration Sprague-Dawley rat

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Biomaterials for spinal cord repair

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Neuroscience Bulletin 2013年第4期29卷 445-459页

作者： Agnes E. Haggerty Martin oudega Departments of Bioengineering University of Pittsburgh Departments of the Center for the Neural Basis of Cognition University of Pittsburgh Departments of Physical Medicine and Rehabilitation University of Pittsburgh Departments of Neurobiology University of Pittsburgh

Spinal cord injury （SCI） results in permanent loss of function leading to often devastating personal, economic and social problems. A contributing factor to the permanence of SCI is that damaged axons do not regenerate, which prevents the re-establishment of axonal circuits involved in function. Many groups are working to develop treatments that address the lack of axon regeneration after SCI. The emergence of biomaterials for regeneration and increased collaboration between engineers, basic and translational scientists, and clinicians hold promise for the development of effective therapies for SCI. A plethora of biomaterials is available and has been tested in various models of SCI. Considering the clinical relevance of contusion injuries, we primarily focus on polymers that meet the specific criteria for addressing this type of injury. Biomaterials may provide structural support and/or serve as a delivery vehicle for factors to arrest growth inhibition and promote axonal growth. Designing materials to address the specific needs of the damaged central nervous system is crucial and possible with current technology. Here, we review the most prominent materials, their optimal characteristics, and their potential roles in repairing and regenerating damaged axons following SCI.

关键词： spinal cord injury axon regeneration biodegradable materials extracellular matrix proteins functionalrecovery growth factor guidance injury and repair spinal motor neuron

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