Glycyrrhetinic acid(GA)is the bioactive ingredient in Glycyrrhizae Radix et Rhizoma.Our previous study has reported that GA has protective effect on realgar-induced hepatotoxicity.However,the details of the hepatoprot...Glycyrrhetinic acid(GA)is the bioactive ingredient in Glycyrrhizae Radix et Rhizoma.Our previous study has reported that GA has protective effect on realgar-induced hepatotoxicity.However,the details of the hepatoprotective mechanisms of GA on realgar-induced liver injury remain to be elucidated.In the study,mice were divided into control,GA-control,realgar,and co-treated groups.Their liver tissues were used for metabonomics study by ultra-performance liquid chromatography-mass spectrometry(UPLCMS)method.The results illustrate that GA significantly ameliorate the liver injury and metabolic perturbations caused by realgar.Some metabolites,such as phenylalanine,pyroglutamic acid(PGA),proline,carnitine,nicotinamide,choline,lysophosphatidylcholine(LPC)16:0 and LPC 18:2 were found responsible for the hepatoprotective effect of GA.These metabolites are associated with the methylation metabolism of arsenic,cell membrane structure,energy metabolism and oxidative stress.From the results of this study,we infer that the potential hepatoprotective mechanism of GA on realgar-induced liver injury may be associated with reducing arsenic accumulation and its methylation metabolism in the liver,promoting the conjugation of arsenic and GSH to play detoxification effect,and ameliorating the liver metabolic perturbations caused by realgar.展开更多
The repair of peripheral nerve injury after complete amputation is difficult,and even with anastomosis,the rapid recovery of nerve function remains challenging.Curcumin,extracted from plants of the genus Curcuma,has b...The repair of peripheral nerve injury after complete amputation is difficult,and even with anastomosis,the rapid recovery of nerve function remains challenging.Curcumin,extracted from plants of the genus Curcuma,has been shown to have anti-oxidant and anti-inflammatory properties and to improve sciatic nerve crush injury in rats.Here,we determined whether curcumin had neuroprotective effects following complete peripheral nerve amputation injury.BALB/c mice underwent complete sciatic nerve amputation,followed by an immediate epineurium anastomosis.Mice were intragastrically administered curcumin at doses of 40（high）,20（moderate）,and 10 mg/kg/d（low） for 1 week.We found that myelin in the mice of the high- and moderate-dose curcumin groups appeared with regular shape,uniform thickness,clear boundary,and little hyperplasia surrounding the myelin.High and moderate doses of curcumin markedly improved both action potential amplitude of the sciatic nerves and the conduction velocity of the corresponding motor neurons,and upregulated m RNA and protein expression of S100,a marker for Schwann cell proliferation,in L4–6 spinal cord segments.These results suggest that curcumin is effective in promoting the repair of complete sciatic nerve amputation injury and that the underlying mechanism may be associated with upregulation of S100 expression.展开更多
Dibutyltin dilaurate functions as a stabilizer for polyvinyl chloride. In this study, experimental rats were intragastrically administered 5, 10, or 20 mg/kg dibutyltin dilaurate to model sub-chronic poisoning. After ...Dibutyltin dilaurate functions as a stabilizer for polyvinyl chloride. In this study, experimental rats were intragastrically administered 5, 10, or 20 mg/kg dibutyltin dilaurate to model sub-chronic poisoning. After exposure, our results showed the activities of superoxide dismutase and glutathione peroxidase decreased in rat brain tissue, while the malondialdehyde and nitric oxide content, as well as nitric oxide synthase activity in rat brain tissue increased. The cell cycle in the right parietal cortex was disordered and the rate of apoptosis increased. DNA damage was aggravated in the cerebral cortex, and the ultrastructure of the right parietal cortex tissues was altered. The above changes became more apparent with exposure to increasing doses of dibutyltin dilaurate. Our experimental findings confirmed the neurotoxicity of dibutyltin dilaurate in rat brain tissues, and demonstrated that the poisoning was dose-dependent.展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.81403066 and 81473417).
文摘Glycyrrhetinic acid(GA)is the bioactive ingredient in Glycyrrhizae Radix et Rhizoma.Our previous study has reported that GA has protective effect on realgar-induced hepatotoxicity.However,the details of the hepatoprotective mechanisms of GA on realgar-induced liver injury remain to be elucidated.In the study,mice were divided into control,GA-control,realgar,and co-treated groups.Their liver tissues were used for metabonomics study by ultra-performance liquid chromatography-mass spectrometry(UPLCMS)method.The results illustrate that GA significantly ameliorate the liver injury and metabolic perturbations caused by realgar.Some metabolites,such as phenylalanine,pyroglutamic acid(PGA),proline,carnitine,nicotinamide,choline,lysophosphatidylcholine(LPC)16:0 and LPC 18:2 were found responsible for the hepatoprotective effect of GA.These metabolites are associated with the methylation metabolism of arsenic,cell membrane structure,energy metabolism and oxidative stress.From the results of this study,we infer that the potential hepatoprotective mechanism of GA on realgar-induced liver injury may be associated with reducing arsenic accumulation and its methylation metabolism in the liver,promoting the conjugation of arsenic and GSH to play detoxification effect,and ameliorating the liver metabolic perturbations caused by realgar.
基金supported by the Jilin Provincial Science & Technology Development Project Fund of China,No.20150311038YY
文摘The repair of peripheral nerve injury after complete amputation is difficult,and even with anastomosis,the rapid recovery of nerve function remains challenging.Curcumin,extracted from plants of the genus Curcuma,has been shown to have anti-oxidant and anti-inflammatory properties and to improve sciatic nerve crush injury in rats.Here,we determined whether curcumin had neuroprotective effects following complete peripheral nerve amputation injury.BALB/c mice underwent complete sciatic nerve amputation,followed by an immediate epineurium anastomosis.Mice were intragastrically administered curcumin at doses of 40（high）,20（moderate）,and 10 mg/kg/d（low） for 1 week.We found that myelin in the mice of the high- and moderate-dose curcumin groups appeared with regular shape,uniform thickness,clear boundary,and little hyperplasia surrounding the myelin.High and moderate doses of curcumin markedly improved both action potential amplitude of the sciatic nerves and the conduction velocity of the corresponding motor neurons,and upregulated m RNA and protein expression of S100,a marker for Schwann cell proliferation,in L4–6 spinal cord segments.These results suggest that curcumin is effective in promoting the repair of complete sciatic nerve amputation injury and that the underlying mechanism may be associated with upregulation of S100 expression.
文摘Dibutyltin dilaurate functions as a stabilizer for polyvinyl chloride. In this study, experimental rats were intragastrically administered 5, 10, or 20 mg/kg dibutyltin dilaurate to model sub-chronic poisoning. After exposure, our results showed the activities of superoxide dismutase and glutathione peroxidase decreased in rat brain tissue, while the malondialdehyde and nitric oxide content, as well as nitric oxide synthase activity in rat brain tissue increased. The cell cycle in the right parietal cortex was disordered and the rate of apoptosis increased. DNA damage was aggravated in the cerebral cortex, and the ultrastructure of the right parietal cortex tissues was altered. The above changes became more apparent with exposure to increasing doses of dibutyltin dilaurate. Our experimental findings confirmed the neurotoxicity of dibutyltin dilaurate in rat brain tissues, and demonstrated that the poisoning was dose-dependent.
