The dramatic increase in intracranial pressure after subarachnoid hemorrhage leads to a decrease in cerebral perfusion pressure and a reduction in cerebral blood flow.Mitochondria are directly affected by direct facto...The dramatic increase in intracranial pressure after subarachnoid hemorrhage leads to a decrease in cerebral perfusion pressure and a reduction in cerebral blood flow.Mitochondria are directly affected by direct factors such as ischemia,hypoxia,excitotoxicity,and toxicity of free hemoglobin and its degradation products,which trigger mitochondrial dysfunction.Dysfunctional mitochondria release large amounts of reactive oxygen species,inflammatory mediators,and apoptotic proteins that activate apoptotic pathways,further damaging cells.In response to this array of damage,cells have adopted multiple mitochondrial quality control mechanisms through evolution,including mitochondrial protein quality control,mitochondrial dynamics,mitophagy,mitochondrial biogenesis,and intercellular mitochondrial transfer,to maintain mitochondrial homeostasis under pathological conditions.Specific interventions targeting mitochondrial quality control mechanisms have emerged as promising therapeutic strategies for subarachnoid hemorrhage.This review provides an overview of recent research advances in mitochondrial pathophysiological processes after subarachnoid hemorrhage,particularly mitochondrial quality control mechanisms.It also presents potential therapeutic strategies to target mitochondrial quality control in subarachnoid hemorrhage.展开更多
Garnet-like Li6.8La3Zr1.8Bi0.2O12 （LLZBO） ＋ x mol.% Al2O3 （x = 0, 1.25, 2.50） lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 100...Garnet-like Li6.8La3Zr1.8Bi0.2O12 （LLZBO） ＋ x mol.% Al2O3 （x = 0, 1.25, 2.50） lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000℃ and 1100℃. XPS, induced coupled plasma optical emission spectrometer （ICP-OES）, XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of AI-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000℃ to 1100℃. The highest ionic conductivity 6.3×10-S/cm was obtained in the LLZBO-1.25%AI sample sintered at 1100℃, in consistent with the lowest activation energy 0.45eV for the lithium ion migration. The mechanism related with good ionic conductivity in the AI-added LLZBO sample was attributed to the lattice distortion induced by the partial AI substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.展开更多
基金supported by the National Natural Science Foundation of China,Nos.82130037(to CH),81971122(to CH),82171323(to WL)the Natural Science Foundation of Jiangsu Province of China,No.BK20201113(to WL)。
文摘The dramatic increase in intracranial pressure after subarachnoid hemorrhage leads to a decrease in cerebral perfusion pressure and a reduction in cerebral blood flow.Mitochondria are directly affected by direct factors such as ischemia,hypoxia,excitotoxicity,and toxicity of free hemoglobin and its degradation products,which trigger mitochondrial dysfunction.Dysfunctional mitochondria release large amounts of reactive oxygen species,inflammatory mediators,and apoptotic proteins that activate apoptotic pathways,further damaging cells.In response to this array of damage,cells have adopted multiple mitochondrial quality control mechanisms through evolution,including mitochondrial protein quality control,mitochondrial dynamics,mitophagy,mitochondrial biogenesis,and intercellular mitochondrial transfer,to maintain mitochondrial homeostasis under pathological conditions.Specific interventions targeting mitochondrial quality control mechanisms have emerged as promising therapeutic strategies for subarachnoid hemorrhage.This review provides an overview of recent research advances in mitochondrial pathophysiological processes after subarachnoid hemorrhage,particularly mitochondrial quality control mechanisms.It also presents potential therapeutic strategies to target mitochondrial quality control in subarachnoid hemorrhage.
基金Acknowledgements This work was financially supported by the National Natural Science Foundation of China （Grant Nos. 11374299, 11405203 and 51401203）.
文摘Garnet-like Li6.8La3Zr1.8Bi0.2O12 （LLZBO） ＋ x mol.% Al2O3 （x = 0, 1.25, 2.50） lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000℃ and 1100℃. XPS, induced coupled plasma optical emission spectrometer （ICP-OES）, XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of AI-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000℃ to 1100℃. The highest ionic conductivity 6.3×10-S/cm was obtained in the LLZBO-1.25%AI sample sintered at 1100℃, in consistent with the lowest activation energy 0.45eV for the lithium ion migration. The mechanism related with good ionic conductivity in the AI-added LLZBO sample was attributed to the lattice distortion induced by the partial AI substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.
