Spinal cord injury-induced motor dysfunction is associated with neuroinflammation.Studies have shown that the triterpenoid lupenone,a natural product found in various plants,has a remarkable anti-inflammatory effect i...Spinal cord injury-induced motor dysfunction is associated with neuroinflammation.Studies have shown that the triterpenoid lupenone,a natural product found in various plants,has a remarkable anti-inflammatory effect in the context of chronic inflammation.However,the effects of lupenone on acute inflammation induced by spinal cord injury remain unknown.In this study,we established an impact-induced mouse model of spinal cord injury,and then treated the injured mice with lupenone(8 mg/kg,twice a day)by intrape ritoneal injection.We also treated BV2 cells with lipopolysaccharide and adenosine5’-triphosphate to simulate the inflammatory response after spinal cord injury.Our res ults showed that lupenone reduced IKBa activation and p65 nuclear translocation,inhibited NLRP3 inflammasome function by modulating nuclear factor kappa B,and enhanced the conve rsion of proinflammatory M1 mic roglial cells into anti-inflammatory M2 microglial cells.Furthermore,lupenone decreased NLRP3 inflammasome activation,NLRP3-induced mic roglial cell polarization,and microglia pyroptosis by inhibiting the nuclear factor kappa B pathway.These findings suggest that lupenone protects against spinal cord injury by inhibiting inflammasomes.展开更多
Recent studies have determined that the nervous system can sense and respond to signals from skeletal tissue,a process known as skeletal interoception,which is crucial for maintaining bone homeostasis.The hypothalamus...Recent studies have determined that the nervous system can sense and respond to signals from skeletal tissue,a process known as skeletal interoception,which is crucial for maintaining bone homeostasis.The hypothalamus,located in the central nervous system(CNS),plays a key role in processing interoceptive signals and regulating bone homeostasis through the autonomic nervous system,neuropeptide release,and neuroendocrine mechanisms.These mechanisms control the differentiation of mesenchymal stem cells into osteoblasts(OBs),the activation of osteoclasts(OCs),and the functional activities of bone cells.Sensory nerves extensively innervate skeletal tissues,facilitating the transmission of interoceptive signals to the CNS.This review provides a comprehensive overview of current research on the generation and coordination of skeletal interoceptive signals by the CNS to maintain bone homeostasis and their potential role in pathological conditions.The findings expand our understanding of intersystem communication in bone biology and may have implications for developing novel therapeutic strategies for bone diseases.展开更多
目的观察柚皮苷对去卵巢骨质疏松大鼠骨组织HIF-1α/VEGF信号通路和H型血管形成的影响,探讨柚皮苷防治骨质疏松症的作用机制。方法建立去卵巢骨质疏松大鼠模型(随机将36只大鼠分为去卵巢组、假手术组和柚皮苷治疗组)。柚皮苷治疗3个月后...目的观察柚皮苷对去卵巢骨质疏松大鼠骨组织HIF-1α/VEGF信号通路和H型血管形成的影响,探讨柚皮苷防治骨质疏松症的作用机制。方法建立去卵巢骨质疏松大鼠模型(随机将36只大鼠分为去卵巢组、假手术组和柚皮苷治疗组)。柚皮苷治疗3个月后,检测血清和骨髓上清骨代谢指标和HIF-1α/VEGF信号通路变化,检测骨密度(bone mineral density,BMD)、骨微结构及H型血管变化。结果柚皮苷治疗组大鼠血清中成骨代谢指标[骨特异性碱性磷酸酶(BALP)、骨钙素(BGP)、I型原胶原分子N端前肽(PINP)]升高;而骨吸收标志物血清C端交联肽(CTX)降低;HIF-1α在血清和骨髓上清中表达均升高;VEGF在骨髓上清中表达升高,而血清中无明显改变;BMD和Micro-CT结果显示柚皮苷治疗组大鼠骨密度和骨量增加;同时股骨近端H型血管表达升高。结论柚皮苷可以调节骨代谢,改善骨质疏松大鼠骨密度,发挥抗骨质疏松作用,其作用机制可能是通过调节HIF-1α/VEGF信号通路、促进H型血管形成来实现的。展开更多
基金supported by the National Natural Science Foundation of China,Nos.81801226(to QK and XS)and 82101445(to XJ)。
文摘Spinal cord injury-induced motor dysfunction is associated with neuroinflammation.Studies have shown that the triterpenoid lupenone,a natural product found in various plants,has a remarkable anti-inflammatory effect in the context of chronic inflammation.However,the effects of lupenone on acute inflammation induced by spinal cord injury remain unknown.In this study,we established an impact-induced mouse model of spinal cord injury,and then treated the injured mice with lupenone(8 mg/kg,twice a day)by intrape ritoneal injection.We also treated BV2 cells with lipopolysaccharide and adenosine5’-triphosphate to simulate the inflammatory response after spinal cord injury.Our res ults showed that lupenone reduced IKBa activation and p65 nuclear translocation,inhibited NLRP3 inflammasome function by modulating nuclear factor kappa B,and enhanced the conve rsion of proinflammatory M1 mic roglial cells into anti-inflammatory M2 microglial cells.Furthermore,lupenone decreased NLRP3 inflammasome activation,NLRP3-induced mic roglial cell polarization,and microglia pyroptosis by inhibiting the nuclear factor kappa B pathway.These findings suggest that lupenone protects against spinal cord injury by inhibiting inflammasomes.
基金supported by the National Natural Science Foundation of China (No.82172408,81902234,81772314,and 81922045)the Original Exploration project (22ZR1480300)+4 种基金Outstanding Academic Leaders (Youth)project (21XD1422900)of Shanghai Science and Technology Innovation Action PlanPrinciple Investigator Innovation Team of Both Shanghai Sixth People’s Hospital and Shanghai Institute of Nutrition and Health,Shanghai Jiao Tong University Medical College“Two-hundred Talent”Program (No.20191829)The Second Three-Year Action Plan for Promoting Clinical Skills and Clinical Innovation in Municipal Hospitals of Shanghai Shenkang (No.SHDC2020CR4032)Shanghai Excellent Academic Leader ProgramShanghai Engineering Research Center for Orthopaedic Material Innovation and Tissue Regeneration (No.20DZ2254100)。
文摘Recent studies have determined that the nervous system can sense and respond to signals from skeletal tissue,a process known as skeletal interoception,which is crucial for maintaining bone homeostasis.The hypothalamus,located in the central nervous system(CNS),plays a key role in processing interoceptive signals and regulating bone homeostasis through the autonomic nervous system,neuropeptide release,and neuroendocrine mechanisms.These mechanisms control the differentiation of mesenchymal stem cells into osteoblasts(OBs),the activation of osteoclasts(OCs),and the functional activities of bone cells.Sensory nerves extensively innervate skeletal tissues,facilitating the transmission of interoceptive signals to the CNS.This review provides a comprehensive overview of current research on the generation and coordination of skeletal interoceptive signals by the CNS to maintain bone homeostasis and their potential role in pathological conditions.The findings expand our understanding of intersystem communication in bone biology and may have implications for developing novel therapeutic strategies for bone diseases.
文摘目的观察柚皮苷对去卵巢骨质疏松大鼠骨组织HIF-1α/VEGF信号通路和H型血管形成的影响,探讨柚皮苷防治骨质疏松症的作用机制。方法建立去卵巢骨质疏松大鼠模型(随机将36只大鼠分为去卵巢组、假手术组和柚皮苷治疗组)。柚皮苷治疗3个月后,检测血清和骨髓上清骨代谢指标和HIF-1α/VEGF信号通路变化,检测骨密度(bone mineral density,BMD)、骨微结构及H型血管变化。结果柚皮苷治疗组大鼠血清中成骨代谢指标[骨特异性碱性磷酸酶(BALP)、骨钙素(BGP)、I型原胶原分子N端前肽(PINP)]升高;而骨吸收标志物血清C端交联肽(CTX)降低;HIF-1α在血清和骨髓上清中表达均升高;VEGF在骨髓上清中表达升高,而血清中无明显改变;BMD和Micro-CT结果显示柚皮苷治疗组大鼠骨密度和骨量增加;同时股骨近端H型血管表达升高。结论柚皮苷可以调节骨代谢,改善骨质疏松大鼠骨密度,发挥抗骨质疏松作用,其作用机制可能是通过调节HIF-1α/VEGF信号通路、促进H型血管形成来实现的。
