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Wang Y, Li X, Qu T, Huang F, Xu J, Gao H, Zhang S. Defective ferritinophagy and imbalanced iron metabolism in PBDE-47-triggered neuronal ferroptosis and salvage by Canolol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 934:173118. [PMID: 38750757 DOI: 10.1016/j.scitotenv.2024.173118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/01/2024] [Accepted: 05/08/2024] [Indexed: 05/20/2024]
Abstract
The brominated flame retardant 2,2',4,4'-tetrabromodiphenyl ether (PBDE-47) is a ubiquitous environmental pollutant that causes neurotoxicity. However, incomplete understanding of the underlying mechanisms has hampered the development of effective intervention strategies. Oxidative stress and related cell death are the modes of action for PBDE-47 neurotoxicity, which are also the characteristics of ferroptosis. Nonetheless, the role of ferroptosis in PBDE-47-induced neurotoxicity remains unclear. In the present study, we found that PBDE-47 triggered ferroptosis in neuron-like PC12 cells, as evidenced by intracellular iron overload, lipid peroxidation, and mitochondrial damage. This was confirmed by ferroptosis inhibitors including the lipid reactive oxygen species scavenger ferrostatin-1 and iron chelator deferoxamine mesylate. Mechanistically, PBDE-47 impaired ferritinophagy by disrupting nuclear receptor coactivator 4-mediated lysosomal degradation of the iron storage protein ferritin. Moreover, PBDE-47 disturbed iron metabolism by increasing cellular iron import via upregulation of transferrin receptor 1 and decreasing cellular iron export via downregulation of ferroportin 1 (FPN1). Intriguingly, rescuing lysosomal function by overexpressing cathepsin B (CatB) mitigated PBDE-47-induced ferroptosis by partially restoring dysfunctional ferritinophagy and enhancing iron excretion via the upregulation of FPN1. However, FPN1 knockdown reversed the beneficial effects of CatB overexpression on the PBDE-47-induced iron overload. Finally, network pharmacology integrated with experimental validation revealed that Canolol, the main phenolic compound in canola oil, protected against PBDE-47-evoked iron overload, resulting in ferroptosis by restoring defective ferritinophagy and improving abnormal iron metabolism via lowering iron uptake and facilitating iron excretion. Overall, these data suggest that ferroptosis is a novel mechanism of PBDE-47-induced neuronal death and that manipulation of ferritinophagy and iron metabolism via Canolol represents a promising therapeutic strategy.
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Affiliation(s)
- Yafei Wang
- Department of Occupational and Environmental Health, MOE Key Laboratory of Environment and Health, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, China
| | - Xiaoning Li
- Department of preventive medicine services, Wuhan Center for Disease Control and Prevention, 288 Machang Road, Wuhan, Hubei, China
| | - Tengjiao Qu
- Department of Occupational and Environmental Health, MOE Key Laboratory of Environment and Health, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, China
| | - Fenghong Huang
- Department of Nutriology, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei, China; Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei, China
| | - Jiqu Xu
- Department of Nutriology, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei, China; Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei, China.
| | - Hui Gao
- Department of Clinical Nutrition, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, Hubei, China.
| | - Shun Zhang
- Department of Occupational and Environmental Health, MOE Key Laboratory of Environment and Health, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, China.
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2
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Sarg NH, Zaher DM, Abu Jayab NN, Mostafa SH, Ismail HH, Omar HA. The interplay of p38 MAPK signaling and mitochondrial metabolism, a dynamic target in cancer and pathological contexts. Biochem Pharmacol 2024; 225:116307. [PMID: 38797269 DOI: 10.1016/j.bcp.2024.116307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 05/08/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
Mitochondria play a crucial role in cellular metabolism and bioenergetics, orchestrating various cellular processes, including energy production, metabolism, adaptation to stress, and redox balance. Besides, mitochondria regulate cellular metabolic homeostasis through coordination with multiple signaling pathways. Importantly, the p38 mitogen-activated protein kinase (MAPK) signaling pathway is a key player in the intricate communication with mitochondria, influencing various functions. This review explores the multifaced interaction between the mitochondria and p38 MAPK signaling and the consequent impact on metabolic alterations. Overall, the p38 MAPK pathway governs the activities of key mitochondrial proteins, which are involved in mitochondrial biogenesis, oxidative phosphorylation, thermogenesis, and iron homeostasis. Additionally, p38 MAPK contributes to the regulation of mitochondrial responses to oxidative stress and apoptosis induced by cancer therapies or natural substances by coordinating with other pathways responsible for energy homeostasis. Therefore, dysregulation of these interconnected pathways can lead to various pathologies characterized by aberrant metabolism. Consequently, gaining a deeper understanding of the interaction between mitochondria and the p38 MAPK pathway and their implications presents exciting forecasts for novel therapeutic interventions in cancer and other disorders characterized by metabolic dysregulation.
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Affiliation(s)
- Nadin H Sarg
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Dana M Zaher
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Nour N Abu Jayab
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Salma H Mostafa
- College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hussein H Ismail
- College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hany A Omar
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.
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Hashempour-Baltork F, Farshi P, Mirza Alizadeh A, Eskandarzadeh S, Abedinzadeh S, Azadmard-Damirchi S, Torbati M. Effect of Refined Edible Oils on Neurodegenerative Disorders. Adv Pharm Bull 2023; 13:461-468. [PMID: 37646051 PMCID: PMC10460797 DOI: 10.34172/apb.2023.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 09/01/2023] Open
Abstract
Neurodegenerative diseases are comprise a prominent class of neurological diseases. Generally, neurodegenerative diseases cannot be cured, and the available treatments can only regulate the symptoms or delay the disease progression. Among the several factors which could clarify the possible pathogenesis of neurodegenerative diseases, next to aging as the main risk, the dietary related diseases are the most important. Vegetable oils, which are composed of triacyclglycerols as the main components and several other components in a trace amount, are the main part of our diet. This review aims to study the effect of refined or unrefined vegetable oil consumption as a preventive or aiding strategy to slow or halt the progression of neurodegenerative diseases. In the refining process, owing to the chemical materials or severe temperatures of the refining process, removal of the desirable minor components is sometimes unavoidable and thus a worrisome issue affecting physical and neurological health.
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Affiliation(s)
- Fataneh Hashempour-Baltork
- Halal Research Center of IRI, Iran Food and Drug Administration, Ministry of Health and Medical Education, Tehran, Iran
| | - Parastou Farshi
- Food Science Institute, Kansas State University, Manhattan, KS, USA
| | - Adel Mirza Alizadeh
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Science and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sevda Eskandarzadeh
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Solmaz Abedinzadeh
- Department of Food Science and Technology, Faculty of Nutrition, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sodeif Azadmard-Damirchi
- Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Mohammadali Torbati
- Department of Food Science and Technology, Faculty of Nutrition, Tabriz University of Medical Sciences, Tabriz, Iran
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4
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Liu H, Zheng C, Li Z, Xia X, Jiang D, Wang W, Zhang R, Xiang X. Inhibitory mechanism of phenolic compounds in rapeseed oil on α-amylase and α-glucosidase: Spectroscopy, molecular docking, and molecular dynamic simulation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 289:122251. [PMID: 36542921 DOI: 10.1016/j.saa.2022.122251] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/24/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
Developing naturally active components to control α-amylase/α-glucosidase activity is highly desired for preventing and managing type 2 diabetes. Rapeseed oil is rich in active phenolic compounds and seed oil is a major source of liposoluble inhibitors to these enzymes. However, it remains unclear about the interaction of phenolic compounds in rapeseed oil with α-amylase/α-glucosidase. This study found that the important phenolic compounds from rapeseed oil (Sinapic acid, SA; canolol, CAO; canolol dimer, CAO dimer) possessed effective inhibition performance against α-amylase and α-glucosidase. CAO showed the lowest and highest inhibitory effect, respectively. In the kinetics studies, the inhibition mechanism of SA/CAO/CAO dimer against α-glucosidase was non-competitive, exhibiting a different way from α-amylase. Fluorescence quenching spectra implied that the static processes were responsible for the spontaneous binding between the compounds and enzymes. Fourier-transform infrared spectroscopy (FT-IR) displayed these compounds-induced conformation alterations of α-amylase/α-glucosidase. Molecular docking revealed that SA/CAO/CAO dimer decreased the catalytic efficiency of α-amylase/α-glucosidase through hydrogen bonds, hydrophobic force, or π-π interaction. Molecular dynamics matched well with the experimental and docking results regarding the inhibitory behaviors and interactions toward α-amylase/α-glucosidase. These results demonstrated the potential benefits of phenolic compounds from rapeseed oil in antidiabetic-related activities.
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Affiliation(s)
- Huihui Liu
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Chang Zheng
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Ziliang Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Xiaoyang Xia
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Dan Jiang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Wen Wang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Ruiying Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China
| | - Xia Xiang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan 430062, China.
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Lu J, Yang Y, Varga E, Marko D, Yu Q, Xie J, Li C, Chen Y. Molecular Mechanisms Associated with Protecting IEC-6 Cells from Acrylamide-Induced Tight Junction Damage by Ganoderma atrum Polysaccharide. Mol Nutr Food Res 2023; 67:e2200774. [PMID: 36565056 DOI: 10.1002/mnfr.202200774] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/08/2022] [Indexed: 12/25/2022]
Abstract
SCOPE The previous in vivo studies show Ganoderma atrum polysaccharide (PSG-F2 ) has a protective effect against the acrylamide (AA)-induced intestinal oxidative damage in rats. Now, this study aims to explore the protective mechanism with IEC-6 cell model. METHODS AND RESULTS Based on RNA Sequencing (RNA-Seq), the study screens MAPK signaling pathway as one of the most crucial pathways for pretreatment with PSG-F2 against AA-induced damage in IEC-6 cells. In total, six key MAPK signaling pathway-related proteins (p-P38/P38, p-ERK/ERK, and p-JNK/JNK), and three tight junction key proteins (Zonula Occludens protein-1, Claudin-1, and Occludin) are detected by Western blot and immunofluorescence, which verify the RNA-Seq data. Moreover, PD98059 interference inhibits critical proteins in the MAPK signaling pathway, thus uncovering the precise molecular mechanisms of MAPK/ERK signaling pathway involve in the protective effects of PSG-F2 against AA-induced intestinal barrier damage. CONCLUSION These findings confirm that PSG-F2 can be used as a daily dietary supplement to protect the intestinal cells from damage caused by thermal processing hazards AA.
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Affiliation(s)
- Jiawen Lu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
| | - Ying Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
| | - Elisabeth Varga
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Straße 38, Vienna, 1090, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, University of Vienna, Währinger Straße 38, Vienna, 1090, Austria
| | - Qiang Yu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
| | - Jianhua Xie
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
| | - Chang Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
| | - Yi Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, P. R. China
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Ye Z, Liu Y. Polyphenolic compounds from rapeseeds (Brassica napus L.): The major types, biofunctional roles, bioavailability, and the influences of rapeseed oil processing technologies on the content. Food Res Int 2023; 163:112282. [PMID: 36596189 DOI: 10.1016/j.foodres.2022.112282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/26/2022] [Accepted: 11/29/2022] [Indexed: 12/09/2022]
Abstract
The rapeseed (Brassica napus L.) are the important oil bearing material worldwide, which contain wide variety of bioactive components with polyphenolic compounds considered the most typical. The rapeseed polyphenols encompass different structural variants, and have been considered to have many bioactive functions, which are beneficial for the human health. Whereas, the rapeseed oil processing technologies affect their content and the biofunctional activities. The present review of the literature highlighted the major types of the rapeseed polyphenols, and summarized their biofunctional roles. The influences of rapeseed oil processing technologies on these polyphenols were also elucidated. Furthermore, the directions of the future studies for producing nutritional rapeseed oils preserved higher level of polyphenols were prospected. The rapeseed polyphenols are divided into the phenolic acids and polyphenolic tannins, both of which contained different subtypes. They are reported to have multiple biofunctional roles, thus showing outstanding health improvement effects. The rapeseed oil processing technologies have significant effects on both of the polyphenol content and activity. Some novel processing technologies, such as aqueous enzymatic extraction (AEE), subcritical or supercritical extraction showed advantages for producing rapeseed oil with higher level of polyphenols. The oil refining process involved heat or strong acid and alkali conditions affected their stability and activity, leading to the loss of polyphenols of the final products. Future efforts are encouraged to provide more clinic evidence for the practical applications of the rapeseed polyphenols, as well as optimizing the processing technologies for the green manufacturing of rapeseed oils.
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Affiliation(s)
- Zhan Ye
- School of Food Science and Technology, Jiangnan University, No. 1800, Lihu Road, Wuxi 214122, Jiangsu, PR China; State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800, Lihu Road, Wuxi 214122, Jiangsu, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu, PR China; National Engineering Research Center for Functional Food, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu, PR China.
| | - Yuanfa Liu
- School of Food Science and Technology, Jiangnan University, No. 1800, Lihu Road, Wuxi 214122, Jiangsu, PR China; State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800, Lihu Road, Wuxi 214122, Jiangsu, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu, PR China; National Engineering Research Center for Functional Food, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu, PR China.
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Fadairo OS, Nandasiri R, Nguyen T, Eskin NAM, Aluko RE, Scanlon MG. Improved Extraction Efficiency and Antioxidant Activity of Defatted Canola Meal Extract Phenolic Compounds Obtained from Air-Fried Seeds. Antioxidants (Basel) 2022; 11:antiox11122411. [PMID: 36552619 PMCID: PMC9774657 DOI: 10.3390/antiox11122411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
This study investigated the efficacy of roasting pre-treatment by air frying to enhance the extraction and recovery of the predominant sinapic acid derivatives (SADs) from roasted canola meal and the antioxidant potential of the methanolic extracts. Canola meal was obtained by air frying canola seed at 160, 170, 180 or 190 °C for 5, 10, 15 or 20 min. Oil was extracted using the Soxhlet method, and the de-oiled meal fraction was air-dried. Phenolic compounds were isolated using ultrasound-assisted extraction with 70% (v/v) methanol and then quantified by high-performance liquid chromatography-diode array detection. The antioxidant potential of the defatted meal methanolic extracts was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), and metal ion-chelating activity (MIC) assays. The highest total phenolic content of 3.15 mg gallic acid equivalent/g dry weight was recorded in the defatted meal extract from seeds pre-treated with air frying at 190 °C for 15 min. Sinapine, sinapic acid and an unknown compound at a retention time (RT) of 26.6 min were the major sinapates identified in the defatted meal with the highest concentrations of 7572 ± 479.2 µg/g DW, 727 ± 43.45 µg/g DW and 1763 ± 73.5 µg/g DW, respectively, obtained at 160 °C for 5 min. Canolol (151.35 ± 7.65 µg/g DW) was detected after air frying at a temperature of 170 °C for 20 min. The FRAP and MIC correlated positively (r = 0.85) and generally decreased with increased air frying temperature-time conditions. The highest FRAP and MIC values of 0.53 mM and 80% were obtained at 160 °C for 5 and 20 min, respectively. The outcome of this study will contribute new knowledge that could improve the value addition and by-product utilization of canola seeds.
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Affiliation(s)
- Olamide S. Fadairo
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Richardson Centre for Food Technology and Research, 196, Innovation Drive, Winnipeg, MB R3T 2N2, Canada
- Correspondence: (O.S.F.); (M.G.S.)
| | - Ruchira Nandasiri
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Richardson Centre for Food Technology and Research, 196, Innovation Drive, Winnipeg, MB R3T 2N2, Canada
- St. Boniface Hospital Albrechtsen Research Centre, 351, Tache Avenue, Winnipeg, MB R2H 2A6, Canada
| | - Thu Nguyen
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Richardson Centre for Food Technology and Research, 196, Innovation Drive, Winnipeg, MB R3T 2N2, Canada
| | - N. A Michael Eskin
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Rotimi E. Aluko
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Richardson Centre for Food Technology and Research, 196, Innovation Drive, Winnipeg, MB R3T 2N2, Canada
| | - Martin G. Scanlon
- Food and Human Nutritional Sciences Department, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Richardson Centre for Food Technology and Research, 196, Innovation Drive, Winnipeg, MB R3T 2N2, Canada
- Correspondence: (O.S.F.); (M.G.S.)
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Soy Isoflavones Protect Neuronal PC12 Cells against Hypoxic Damage through Nrf2 Activation and Suppression of p38 MAPK and AKT-mTOR Pathways. Antioxidants (Basel) 2022; 11:antiox11102037. [PMID: 36290760 PMCID: PMC9598610 DOI: 10.3390/antiox11102037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/02/2022] [Accepted: 10/12/2022] [Indexed: 11/25/2022] Open
Abstract
Isoflavones are a class of major phenolic compounds, derived from soybeans, that possess unique therapeutic and biological properties. The possible mechanisms of isoflavone-mediated protection of neuronal PC12 cells against hypoxic damage was investigated in this study. Isoflavones showed potential neuroprotective effects by increasing cell viability, decreasing the level of reactive oxygen species (ROS), and inhibiting apoptosis and cell cycle arrest in cobalt chloride (CoCl2)-induced hypoxic damage. A Western blot analysis indicated that isoflavones decreased apoptosis by up-regulating the Bcl-xL protein and down-regulating the Bax protein. They further reduced the S-phase fraction of the cell cycle by down-regulating the p21 protein and up-regulating the cyclin A protein levels. Additionally, isoflavones activated Nrf2 protein translocation and inhibited the p38 MAPK and AKT–mTOR pathways. A molecular docking analysis further revealed that isoflavones displayed a potential competitive interaction with the Nrf2 protein for Keap1. Our findings suggest that isoflavones could be a potent neuroprotective phytochemical in soybeans and their products.
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Yang Q, Li Y, Liu H, Wang E, Peng M, Deng T, Pan X, Luo Z, Yan Y, Yang L, Yang X. Catalyst-free decarboxylation of 4-hydroxycinnamic acids: efficient synthesis of 4-vinylphenols. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220014. [PMID: 35601446 PMCID: PMC9043707 DOI: 10.1098/rsos.220014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/01/2022] [Indexed: 05/03/2023]
Abstract
We report herein an efficient protocol for the synthesis of 4-vinylphenols by a catalyst-free decarboxylation of trans-4-hydroxycinnamic acids. A variety of 4-vinylphenols has been synthesized in moderate to excellent yields. This protocol also features no polymerization.
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Affiliation(s)
- Qian Yang
- Department of Medicine and Food, Guizhou Vocational College of Agriculture, Guiyang 550041, People's Republic of China
| | - Youjuan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Huanhuan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Enhua Wang
- Department of Medicine and Food, Guizhou Vocational College of Agriculture, Guiyang 550041, People's Republic of China
| | - Mei Peng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Tingfei Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Xiong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Zhongsheng Luo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Yanfang Yan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Lishou Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
| | - Xiaosheng Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, People's Republic of China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, People's Republic of China
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10
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Wang X, Cheng K, Liu Z, Sun Y, Zhou L, Xu M, Dai X, Xiong Y, Zhang H. Bioactive constituents of Mosla chinensis-cv. Jiangxiangru ameliorate inflammation through MAPK signaling pathways and modify intestinal microbiota in DSS-induced colitis mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 93:153804. [PMID: 34735907 DOI: 10.1016/j.phymed.2021.153804] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 09/13/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Mosla chinensis Maxim. cv. Jiangxiangru (JXR), a traditional Chinese medicine, commonly used for the therapy of cold, fever, diarrhea, digestive disorders, and other diseases. Inflammatory bowel disease (IBD) is a chronic disorder of the human gastrointestinal tract. Research about the effect of JXR on IBD and the active ingredient composition of JXR remains deficiency. PURPOSE This study aims to determine the phytochemical composition and the anti-inflammatory property of JXR, as well as the possible anti-inflammatory mechanisms. METHODS The bioactive profile of JXR extracts was determined by UPLC-LTQ-Orbitrap-MS. A DSS induced colitis mouse model was applied to explore the anti-inflammatory activity of JXR. The body weight, colon length and histopathological status of colon tissue were evaluated. The content of inflammatory mediators (nitric oxide (NO), prostaglandin E2 (PGE2)) and cytokines (tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β)), corresponding mRNA and protein expression levels were analyzed. Oxidation pressure and gut microbial composition were also explored. RESULTS Totally 63 constitutes were identified from JXR, among them, phenolic acids and flavonoids comprised a large part, and rosmarinic acid (RA) was the main compound. The results of DSS-induced colitis mice model indicated that JXR effectively ameliorated inflammation, restore the redox balance in the gut. JXR treatment significantly reduced the production of reactive oxygen species (ROS), increased the activity of antioxidative enzyme, suppressed the secretion of inflammatory mediators (NO, PGE2) and cytokines (TNF-α, IL-6, IL-1β). JXR also restrained the activation of mitogen-activated protein kinases (MAPKs) signaling pathway. Furthermore, JXR could restore the microbial diversity by suppressing Bacteroidaceae, increasing Bifidobacteriales and Melainabacteria in DSS colitis mouse model. CONCLUSIONS This study demonstrated that JXR composed with various bioactive compounds, effectively ameliorated colitis, restored the redox balance and regulated gut microbiota. Results from the present study provide an insight of therapeutic potential of JXR in IBD based on its anti-inflammatory and antioxidant properties, also provide a scientific basis for using JXR as a functional ingredient to promote colon health.
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Affiliation(s)
- Xiaoya Wang
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
| | - Kejun Cheng
- Chemical Biology Center, Lishui Institute of Agricultural Sciences, Lishui 323000, Zhejiang, China
| | - Zhiyong Liu
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Yong Sun
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China
| | - Lifen Zhou
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Mengtian Xu
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Xiuxiu Dai
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Yaokun Xiong
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China.
| | - Hua Zhang
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China.
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11
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Xia X, Zhang Z, Zheng C, Deng Q, Zheng M, Han L, Xiang X. Ameliorative effects of canolol against acrylamide toxicity in PC12 cells through modulating MAPKs pathway and autophagy. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Jiang S, Chen J. WRN inhibits oxidative stress-induced apoptosis of human lensepithelial cells through ATM/p53 signaling pathway and its expression is downregulated by DNA methylation. Mol Med 2020; 26:68. [PMID: 32640976 PMCID: PMC7341633 DOI: 10.1186/s10020-020-00187-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 06/16/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Apoptosis and oxidative stress are the main etiology of age related cataract (ARC). This article aims to investigate the role of WRN in lens epithelial cells (LECs). METHODS We estimated the methylation level of WRN in anterior lens capsule tissues of ARC patients. SRA01/04 (LECs) cells were treated with H2O2 or combined with 5-aza-2-deoxycytidine (5-Aza-CdR) or chloroquine. CCK8 and flow cytometry were performed to explore proliferation and apoptosis. The content of ROS was detected by fluorescent probe DCFH-DA. The gene and protein expression was assessed by quantitative real-time PCR or western blot. RESULTS WRN was down-regulated and the methylation level of WRN was increased in the anterior lens capsule tissues. WRN overexpression and 5-Aza-CdR enhanced proliferation and repressed apoptosis and oxidative stress of SRA01/04 cells. 5-Aza-CdR enhanced WRN expression. WRN knockdown inhibited proliferation and promoted apoptosis and oxidative stress of SRA01/04 cells, which was rescued by 5-Aza-CdR. WRN overexpression and 5-Aza-CdR repressed ATM/p53 signaling pathway. Furthermore, chloroquine inhibited proliferation and promoted apoptosis and oxidative stress of SRA01/04 cells by activating ATM/p53 signaling pathway. The influence conferred by chloroquine was abolished by WRN overexpression. CONCLUSION Our study reveals that DNA methylation mediated WRN inhibits apoptosis and oxidative stress of human LECs through ATM/p53 signaling pathway.
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Affiliation(s)
- Shengqun Jiang
- Ophthalmology Department, The First Affiliated Hospital of Jinan University Guangzhou, No.601 Huangpu Avenue West, Guangzhou, Guangdong Province, China
- Ophthalmology Department, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui Province, China
| | - Jiansu Chen
- Ophthalmology Department, The First Affiliated Hospital of Jinan University Guangzhou, No.601 Huangpu Avenue West, Guangzhou, Guangdong Province, China.
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Yu G, Guo T, Huang Q. Preparation of rapeseed oil with superhigh canolol content and superior quality characteristics by steam explosion pretreatment technology. Food Sci Nutr 2020; 8:2271-2278. [PMID: 32405384 PMCID: PMC7215231 DOI: 10.1002/fsn3.1502] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/02/2019] [Accepted: 12/09/2019] [Indexed: 01/15/2023] Open
Abstract
In this study, rapeseed was pretreated by steam explosion pretreatment technology and subsequently pressed to prepare rapeseed oil. GC, UPLC, and HPLC techniques were employed to analyze the quality characteristics of the rapeseed oil, including the canolol content and other quality characteristics. Additionally, the effect of steam explosion pretreatment technology on the canolol content of rapeseed oil was studied and the formation mechanism of canolol elucidated. The results revealed that when the steam explosion pressure reached 1.0 MPa, the canolol content of the tested oil increased from 41.21 to 2,168.69 mg/kg (52.63-fold increase) and that sinapic acid played a significant role in the conversion of canolol. Thus, the sinapine was converted into the intermediate (sinapic acid) by hydrolysis, which in turn was transformed into canolol through decarboxylation. The instantaneous high-energy environment generated by steam explosion pretreatment could intensify the hydrolysis and decarboxylation reactions of sinapine and sinapinic acid, thereby significantly increasing the canolol content of the oil. To prove the superiority of steam explosion pretreatment, we compared it with other pretreatment technologies, including traditional high-temperature roasting and popular microwave pretreatment. The results revealed that rapeseed oil prepared by steam explosion pretreatment displayed the best quality characteristics. This study can be a reference for the preparation process of rapeseed oil with superhigh canolol content and superior quality characteristics using steam explosion pretreatment.
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Affiliation(s)
- Gaiwen Yu
- Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhanChina
- Hubei Key Laboratory of Lipid Chemistry and NutritionWuhanChina
- Oil Crops and Lipids Process Technology National & Local Joint Engineering LaboratoryWuhanChina
| | - Tingting Guo
- Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhanChina
- Hubei Key Laboratory of Lipid Chemistry and NutritionWuhanChina
- Oil Crops and Lipids Process Technology National & Local Joint Engineering LaboratoryWuhanChina
| | - Qingde Huang
- Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhanChina
- Hubei Key Laboratory of Lipid Chemistry and NutritionWuhanChina
- Oil Crops and Lipids Process Technology National & Local Joint Engineering LaboratoryWuhanChina
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Xiao L, Liang S, Ge L, Wan H, Wu W, Fei J, Wu S, Zhou B, Zeng X. 4,5-di-O-caffeoylquinic acid methyl ester isolated from Lonicera japonica Thunb. targets the Keap1/Nrf2 pathway to attenuate H 2O 2-induced liver oxidative damage in HepG2 cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2020; 70:153219. [PMID: 32361557 DOI: 10.1016/j.phymed.2020.153219] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 02/17/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND 4,5-di-O-caffeoylquinic acid methyl ester (4,5-CQME) is a caffeoylquinic acid (CQA) isolated from Lonicera japonica Thunb., a traditional Chinese medicine. To date, the biological activity of 4,5-CQME has not been fully investigated. PURPOSE The aim of the current study was to explore the anti-oxidative activity and the underlying mechanism of 4,5-CQME. METHODS MTT assay was used to evaluate the cytoprotective effect of 4,5-CQME. DCFH-DA was used as a fluorescence probe to detect intracellular ROS. The mitochondrial membrane potential was detected using the fluorescent probe JC-1. MDA and GSH levels were measured using MDA and GSH commercial kits, respectively. Apoptosis assay was performed using the Annexin V-FITC/PI method. The functional mechanism of 4,5-CQME was investigated by analyzing relative signaling pathways through immunofluorescent staining, quantitative PCR and western blot analysis. RESULTS HepG2 cells were incubated with different concentrations of 4,5-CQME for 12 h before exposure to 500 μM H2O2 for 3 h. 4,5-CQME attenuated H2O2-induced oxidative damage and had a higher cytoprotective effect than 3-caffeoylquinic acid, 3-caffeoylquinic acid methyl ester, or 4,5-di-O-caffeoylquinic acid. 4,5-CQME also reduced ROS and MDA levels and rescued GSH depletion. Western blots demonstrated that 4,5-CQME decreased Bax/Bcl-2 and Bak levels. A mechanistic study confirmed that 4,5-CQME significantly suppressed H2O2-induced MAPKs phosphorylation but had little effect on MAPKs phosphorylation under normal conditions. By contrast, 4,5-CQME induced AKT phosphorylation in the presence or absence of H2O2. 4,5-CQME also regulated the Keap1/Nrf2 signaling pathway and enhanced both the mRNA and protein expressions of HO-1 and NQO1. The anti-oxidative effect of 4,5-CQME was greatly abolished by co-incubation with the Nrf2 inhibitor ML385 or PI3K inhibitor wortmannin. CONCLUSIONS Taken together, these results showed that 4,5-CQME offered significant protection against H2O2-induced oxidative stress, and its effect was in part due to the modulation of the Keap1/Nrf2 pathway.
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Affiliation(s)
- Lingyun Xiao
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Shu Liang
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Lanlan Ge
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Haoqiang Wan
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Department of Pathology (Longhua Branch), 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Weigang Wu
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Jia Fei
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, Guangdong Province, China
| | - Shipin Wu
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China
| | - Boping Zhou
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China.
| | - Xiaobin Zeng
- Centre Lab of Longhua Branch and Department of Infectious Disease, 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Department of Pathology (Longhua Branch), 2nd Clinical Medical College (Shenzhen People's Hospital) of Jinan University, Shenzhen 518020, Guangdong Province, China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Medicine School of Shenzhen University, Shenzhen 518037, Guangdong Province, China.
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Xia X, Xiang X, Huang F, Zheng M, Zhang Z, Han L. Dietary canolol induces apoptosis in human cervical carcinoma HeLa cells through ROS-MAPK mediated mitochondrial signaling pathway: In vitro and in vivo. Chem Biol Interact 2019; 300:138-150. [DOI: 10.1016/j.cbi.2019.01.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/22/2018] [Accepted: 01/14/2019] [Indexed: 01/13/2023]
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Feng W, Liu Y, Fei F, Chen Y, Ding Y, Yan M, Feng Y, Zhao T, Mao G, Yang L, Wu X. Improvement of high-glucose and insulin resistance of chromium malate in 3T3-L1 adipocytes by glucose uptake and insulin sensitivity signaling pathways and its mechanism. RSC Adv 2019; 9:114-127. [PMID: 35521592 PMCID: PMC9059288 DOI: 10.1039/c8ra07470d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/13/2018] [Indexed: 12/18/2022] Open
Abstract
Previous study has revealed that chromium malate could improve insulin resistance and the regulation of fasting blood glucose in type 2 diabetic rats. This study was designed to investigate the effect of chromium malate on hypoglycemic and improve insulin resistance activities in 3T3-L1 adipocytes with insulin resistance and investigate the acting mechanism. The result indicated that chromium malate exhibited direct hypoglycemic activity in vitro. Compared with the model group, chromium malate could significantly promote the expression levels of GLUT-4, Akt, Irs-1, PPARγ, PI3K and p38-MAPK and their mRNA, increase p-AKT/AKT level, AKT and AMPKβ1 phosphorylation and reduce Irs-1 phosphorylation and p-Irs-1/Irs-1 level in 3T3-L1 adipocytes (p < 0.05). Chromium malate is more effective in regulating the proteins and mRNA expressions than those of chromium trichloride and chromium picolinate. Compared to the model group, pretreatment with the specific p38-MAPK inhibitor completely inhibited the GLUT-4 and Irs-1 proteins and mRNA expressions induced by the chromium malate. In conclusion, chromium malate had a beneficial influence on improvement of controlling glucose levels and insulin resistance in 3T3-L1 adipocytes with insulin resistance by regulating proteins productions and genes expressions in glucose uptake and insulin sensitivity signaling pathways. Chromium malate could increase the related protein and mRNA levels in 3T3-L1 adipocytes with insulin resistant. Pretreatment with the inhibitor completely/partially inhibited the GLUT-4 and Irs-1 proteins and mRNA expression compared to model group.![]()
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