Flaxseed lignan macromolecules(FLM)are a class of important secondary metabolites in fl axseed,which have been widely concerned due to their biological and pharmacological properties,especially for their antioxidative...Flaxseed lignan macromolecules(FLM)are a class of important secondary metabolites in fl axseed,which have been widely concerned due to their biological and pharmacological properties,especially for their antioxidative activity.For the composition and structure of FLM,our results confirmed that ferulic acid glycoside(FerAG)was directly ester-linked with herbacetin diglucoside(HDG)or pinoresinol diglucoside(PDG),which might determine the beginning of FLM biosynthesis.Additionally,p-coumaric acid glycoside(CouAG)might determine the end of chain extension during FLM synthesis in fl axseed.FLM exhibited higher antioxidative activity in polar systems,as shown by its superior 1,1-diphenyl-2-picrylhydrazyl(DPPH)free radical scavenging capacity compared to the 2,2’-azinobis(3-ehtylbenzothiazolin-6-sulfnic acid)(ABTS)cation free radical scavenging capacity in non-polar systems.Moreover,the antioxidative activity of FLM was found to be highly dependent on its composition and structure.In particular,it was positively correlated with the number of phenolic hydroxyl groups(longer FLM chains)and inversely related to the steric hindrance at the ends(lower levels of FerAG and CouAG).These fi ndings verifi ed the potential application of FLM in nonpolar systems,particularly in functional food emulsions。展开更多
Aluminum has been associated with neurodegenerative diseases.ALA(α-linolenic acid),an essential dietary component for human health,possesses prominent biological activities.Herein,we aim to explore the neuroprotectiv...Aluminum has been associated with neurodegenerative diseases.ALA(α-linolenic acid),an essential dietary component for human health,possesses prominent biological activities.Herein,we aim to explore the neuroprotective effects of ALA on aluminum toxicity and reveal the underlying mechanism.Results show that aluminum chloride(denoted as Al)enabled cell viability decline and apoptosis with oxidative stress and mitochondrial damage in differentiated rat pheochromocytoma cells(PC12)for 24 h incubation.Compared with Al(10 mmol/L)treatment alone,ALA(50μmol/L)pretreatment for 24 h significantly enhanced cell viability by 28.40%,and hindered cell apoptosis by 12.35%,together with recovering redox state balance and alleviating mitochondrial damage.It was measured that ALA treatment upregulated Bcl-2 expression and down-regulated Bax level,accompanied with an expression decline of caspase-3 and caspase-9.Meanwhile,ALA pretreatment was proved to increase protein kinase A(PKA)expression and to promote phosphorylation of cAMP response element-binding protein(p-CREB),resulting in elevation on the level of brain-derived neurotrophic factor(BDNF).The above results showed that ALA attenuated Al toxicity in PC12 cells by mediating the PKA-CREBBDNF signaling pathway.展开更多
To better understand canolol as an efficient intracellular antioxidant agent in food related fields, potential cellular antioxidant activity and cytotoxicity were evaluated using multiple assays, including cellular an...To better understand canolol as an efficient intracellular antioxidant agent in food related fields, potential cellular antioxidant activity and cytotoxicity were evaluated using multiple assays, including cellular antioxidant activity(CAA), 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide(MTT) and methylene blue assay. CAA assay was used to identify the half maximal effective concentration of canolol and other bioactive components, such as sinapic acid, resveratrol and sesamol in oil crops. Results showed that antioxidant capacity(without PBS wash) varies between different compounds. Capacity variation followed the order: sinapic acid > canolol > resveratrol > sesamol. While with PBS wash, the order changed to sinapic acid > resveratrol > canolol > sesamol. Half maximal inhibitory concentration of canolol measured by MTT was 1887.08±1.22 μmol/L, implying that cytotoxicity of canolol was greatly lower than that of resveratrol, sesamol and sinapic acid. Methylene blue assay showed that cell viability was still up to 90% exposed to canolol at a high concentration of 4444 μmol/L. It suggested that canolol had desired antioxidant activity in organism with low cellular cytotoxicity.展开更多
Canolol is a natural polyphenolic compound in rapeseed oil with multiple biological activities.Anti-cancer potential of canolol has been proposed in some studies.However,the effect and underlying mechanism of canolol ...Canolol is a natural polyphenolic compound in rapeseed oil with multiple biological activities.Anti-cancer potential of canolol has been proposed in some studies.However,the effect and underlying mechanism of canolol on human gastric carcinoma(AGS)cells have not been well understood.This study showed that canolol had significant inhibition in proliferation and strongly apoptotic effects in AGS cells,which were verified by the decrease of cell viability,high level of reactive oxygen species(ROS),and damage in mitochondria membrane potential(MMP).Treatment with canolol arrested cells in S phase,and increased expressions of Bax,cleaved caspase-9,and cleaved caspase-3 proteins.Meanwhile,low expression of Bcl-2 and cytochrome C(Cyt C)release were found.The expressions of PI3K(phosphoinositide 3-kinase)and p-AKT(phosphorylated serine/threonine kinase)were also downregulated.Overall,these results suggested that canolol inhibited proliferation and induced apoptosis in AGS cells by regulating PI3K/Akt pathway,demonstrating a potential in gastric cancer treatment.展开更多
基金support from National Natural Science Foundation of China(32072267)supported by China Agriculture Research System of CRAS-14.
文摘Flaxseed lignan macromolecules(FLM)are a class of important secondary metabolites in fl axseed,which have been widely concerned due to their biological and pharmacological properties,especially for their antioxidative activity.For the composition and structure of FLM,our results confirmed that ferulic acid glycoside(FerAG)was directly ester-linked with herbacetin diglucoside(HDG)or pinoresinol diglucoside(PDG),which might determine the beginning of FLM biosynthesis.Additionally,p-coumaric acid glycoside(CouAG)might determine the end of chain extension during FLM synthesis in fl axseed.FLM exhibited higher antioxidative activity in polar systems,as shown by its superior 1,1-diphenyl-2-picrylhydrazyl(DPPH)free radical scavenging capacity compared to the 2,2’-azinobis(3-ehtylbenzothiazolin-6-sulfnic acid)(ABTS)cation free radical scavenging capacity in non-polar systems.Moreover,the antioxidative activity of FLM was found to be highly dependent on its composition and structure.In particular,it was positively correlated with the number of phenolic hydroxyl groups(longer FLM chains)and inversely related to the steric hindrance at the ends(lower levels of FerAG and CouAG).These fi ndings verifi ed the potential application of FLM in nonpolar systems,particularly in functional food emulsions。
基金supported by the National Natural Science Foundation of China (31972041, 32101955)the China Agriculture Research System of MOF and MARA (CARS-12)+1 种基金the Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (CAASASTIP-2016-OCRI)the Key Scientific Research Projects of Hubei Province (2020BCA086)
文摘Aluminum has been associated with neurodegenerative diseases.ALA(α-linolenic acid),an essential dietary component for human health,possesses prominent biological activities.Herein,we aim to explore the neuroprotective effects of ALA on aluminum toxicity and reveal the underlying mechanism.Results show that aluminum chloride(denoted as Al)enabled cell viability decline and apoptosis with oxidative stress and mitochondrial damage in differentiated rat pheochromocytoma cells(PC12)for 24 h incubation.Compared with Al(10 mmol/L)treatment alone,ALA(50μmol/L)pretreatment for 24 h significantly enhanced cell viability by 28.40%,and hindered cell apoptosis by 12.35%,together with recovering redox state balance and alleviating mitochondrial damage.It was measured that ALA treatment upregulated Bcl-2 expression and down-regulated Bax level,accompanied with an expression decline of caspase-3 and caspase-9.Meanwhile,ALA pretreatment was proved to increase protein kinase A(PKA)expression and to promote phosphorylation of cAMP response element-binding protein(p-CREB),resulting in elevation on the level of brain-derived neurotrophic factor(BDNF).The above results showed that ALA attenuated Al toxicity in PC12 cells by mediating the PKA-CREBBDNF signaling pathway.
基金supported by the National Natural Science Foundation of China (31601438, 31471620)the Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (CAAS-ASTIP-2013-OCRI)+2 种基金the Earmarked Fund for China Agriculture Research System (CARS13)the Director Fund of Oil Crops Research Institute (1610172016003)the Major Program of Technology Innovation Program of Hubei Province (2017ABA144)
文摘To better understand canolol as an efficient intracellular antioxidant agent in food related fields, potential cellular antioxidant activity and cytotoxicity were evaluated using multiple assays, including cellular antioxidant activity(CAA), 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide(MTT) and methylene blue assay. CAA assay was used to identify the half maximal effective concentration of canolol and other bioactive components, such as sinapic acid, resveratrol and sesamol in oil crops. Results showed that antioxidant capacity(without PBS wash) varies between different compounds. Capacity variation followed the order: sinapic acid > canolol > resveratrol > sesamol. While with PBS wash, the order changed to sinapic acid > resveratrol > canolol > sesamol. Half maximal inhibitory concentration of canolol measured by MTT was 1887.08±1.22 μmol/L, implying that cytotoxicity of canolol was greatly lower than that of resveratrol, sesamol and sinapic acid. Methylene blue assay showed that cell viability was still up to 90% exposed to canolol at a high concentration of 4444 μmol/L. It suggested that canolol had desired antioxidant activity in organism with low cellular cytotoxicity.
基金supported by the National Natural Science Foundation of China (31972041, 31601438)the Natural Science Foundation of Hubei Province (2019CFB583)+2 种基金the Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (CAAS-ASTIP-2013-OCRI)the Earmarked Fund for China Agriculture Research System (CARS-13)National Key R&D Program of China (2016YFD0401401)
文摘Canolol is a natural polyphenolic compound in rapeseed oil with multiple biological activities.Anti-cancer potential of canolol has been proposed in some studies.However,the effect and underlying mechanism of canolol on human gastric carcinoma(AGS)cells have not been well understood.This study showed that canolol had significant inhibition in proliferation and strongly apoptotic effects in AGS cells,which were verified by the decrease of cell viability,high level of reactive oxygen species(ROS),and damage in mitochondria membrane potential(MMP).Treatment with canolol arrested cells in S phase,and increased expressions of Bax,cleaved caspase-9,and cleaved caspase-3 proteins.Meanwhile,low expression of Bcl-2 and cytochrome C(Cyt C)release were found.The expressions of PI3K(phosphoinositide 3-kinase)and p-AKT(phosphorylated serine/threonine kinase)were also downregulated.Overall,these results suggested that canolol inhibited proliferation and induced apoptosis in AGS cells by regulating PI3K/Akt pathway,demonstrating a potential in gastric cancer treatment.
