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Liu A, Liu Z, Shen H, Du W, Jiang Y, Wang L, Zhang R, Jin P, Zhang X. Potential mechanism prediction of indole-3-propionic acid against diminished ovarian reserve via network pharmacology, molecular docking and experimental verification. BMC Complement Med Ther 2024; 24:316. [PMID: 39192219 PMCID: PMC11348684 DOI: 10.1186/s12906-024-04611-1] [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: 05/31/2023] [Accepted: 08/13/2024] [Indexed: 08/29/2024] Open
Abstract
BACKGROUND Oxidative stress (OS) is one of the major causes of ovarian aging and dysfunction. Indole-3-propionic acid (IPA) is an indole compound derived from tryptophan with free radical scavenging and antioxidant properties, and thus may have potential applications in protecting ovarian function, although the exact mechanisms are unknown. This study aims to preliminarily elucidate the potential mechanisms of IPA that benefit ovarian reserve function through network pharmacology, molecular docking, and experimental verification. METHODS The related protein targets of IPA were searched on SwissTargetPrediction, TargetNet, BATMAN-TCM, and PharmMapper databases. The potential targets of diminished ovarian reserve (DOR) were identified from OMIM, GeneCards, DrugBank, and DisGeNET databases. The common targets were uploaded directly to the STRING database to construct PPI networks. We then performed GO and KEGG enrichment analysis on the targets. Subsequently, molecular docking and molecular dynamics simulation were used to validate the binding conformation of IPA to candidate targets. Furthermore, we carried out in vitro experiments to validate the prediction results of network pharmacology. RESULTS We identified a total of 61 potential targets for the interaction of IPA with DOR. The PPI network topological parameter analysis yielded 13 hub genes for DOR treatment. The GO biological process enrichment analysis identified 293 entries, mainly enriched in aging, signal transduction, response to hypoxia, negative regulation of apoptotic process, and positive regulation of cell proliferation. The KEGG enrichment analysis mainly included lipid and atherosclerosis, progesterone-mediated oocyte maturation, AGE-RAGE, relaxin, estrogen, and other signaling pathways. The molecular docking further revealed the direct binding of IPA with six hub proteins including NOS3, AKT1, EGFR, PPARA, SRC, and TNF. In vitro experiments showed that IPA pretreatment attenuated H2O2-induced cellular oxidative stress damage, while IPA exerted cytoprotective and antioxidant damage effects by regulating the six hub genes and antioxidant proteins. CONCLUSION We systematically illustrated the potential protective effects of IPA against DOR through multiple targets and pathways using network pharmacology, and further verified the cytoprotective effect and antioxidant properties of IPA through in vitro experiments. These findings provide new insights into the targets and molecular mechanisms whereby IPA improves DOR.
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Affiliation(s)
- Ahui Liu
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, Gansu, China
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
| | - Zhijun Liu
- The Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Haofei Shen
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, Gansu, China
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China
| | - Wenjing Du
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, Gansu, China
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China
| | - Yanbiao Jiang
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, Gansu, China
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
| | - Liyan Wang
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China
| | - Rui Zhang
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China
| | - Panpan Jin
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China.
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China.
| | - Xuehong Zhang
- Reproductive Medicine Center, The First Hospital of Lanzhou University, Chengguan District, No. 1 Dong Gang Xi Road, Lanzhou, Gansu, 730000, China.
- Key Laboratory for Reproductive Medicine and Embryo, Lanzhou, Gansu, China.
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Geng Y, Mou Y, Xie Y, Ji J, Chen F, Liao X, Hu X, Ma L. Dietary Advanced Glycation End Products: An Emerging Concern for Processed Foods. FOOD REVIEWS INTERNATIONAL 2023. [DOI: 10.1080/87559129.2023.2169867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Yaqian Geng
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Yao Mou
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Yingfeng Xie
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Junfu Ji
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
- Xinghua Industrial Research Centre for Food Science and Human Health, China Agricultural University, Xinghua, China
| | - Fang Chen
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Xiaojun Liao
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Xiaosong Hu
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
| | - Lingjun Ma
- College of Food Science and Nutritional Engineering, National Engineering Research Centre for Fruits and Vegetables Processing, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing, China
- Xinghua Industrial Research Centre for Food Science and Human Health, China Agricultural University, Xinghua, China
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Electroacupuncture Improves Blood-Brain Barrier and Hippocampal Neuroinflammation in SAMP8 Mice by Inhibiting HMGB1/TLR4 and RAGE/NADPH Signaling Pathways. Chin J Integr Med 2023; 29:448-458. [PMID: 36609953 DOI: 10.1007/s11655-023-3592-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2022] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To investigate the molecular mechanisms underlying the beneficial effect of electroacupuncture (EA) in experimental models of Alzheimer's disease (AD) in vivo. METHODS Senescence-accelerated mouse prone 8 (SAMP8) mice were used as AD models and received EA at Yingxiang (LI 20, bilateral) and Yintang (GV 29) points for 20 days. For certain experiments, SAMP8 mice were injected intravenously with human fibrin (2 mg). The Morris water maze test was used to assess cognitive and memory abilities. The changes of tight junctions of blood-brain barrier (BBB) in mice were observed by transmission electron microscope. The expressions of fibrin, amyloid- β (Aβ), and ionized calcium-binding adapter molecule 1 (IBa-1) in mouse hippocampus (CA1/CA3) were detected by reverse transcription-quantitative polymerase chain reaction (qRT-PCR), Western blot or immunohistochemical staining. The expression of fibrin in mouse plasma was detected by enzyme-linked immunosorbent assay. The expressions of tight junction proteins zonula occludens-1 and claudin-5 in hippocampus were detected by qRT-PCR and immunofluorescence staining. Apoptosis of hippocampal neurons was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. RESULTS Fibrin was time-dependently deposited in the hippocampus of SAMP8 mice and this was inhibited by EA treatment (P<0.05 or P<0.01). Furthermore, EA treatment suppressed the accumulation of Aβ in the hippocampus of SAMP8 mice (P<0.01), which was reversed by fibrin injection (P<0.05 or P<0.01). EA improved SAMP8 mice cognitive impairment and BBB permeability (P<0.05 or P<0.01). Moreover, EA decreased reactive oxygen species levels and neuroinflammation in the hippocampus of SAMP8 mice, which was reversed by fibrin injection (P<0.05 or P<0.01). Mechanistically, EA inhibited the promoting effect of fibrin on the high mobility group box protein 1 (HMGB1)/toll-like receptor 4 (TLR4) and receptor for advanced glycation end products (RAGE)/nicotinamide adenine dinucleotide phosphate (NADPH) signaling pathways (P<0.01). CONCLUSION EA may potentially improve cognitive impairment in AD via inhibition of fibrin/A β deposition and deactivation of the HMGB1/TLR4 and RAGE/NADPH signaling pathways.
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Yan F, Zhao Q, Li Y, Zheng Z, Kong X, Shu C, Liu Y, Shi Y. The role of oxidative stress in ovarian aging: a review. J Ovarian Res 2022; 15:100. [PMID: 36050696 PMCID: PMC9434839 DOI: 10.1186/s13048-022-01032-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 08/21/2022] [Indexed: 11/29/2022] Open
Abstract
Ovarian aging refers to the process by which ovarian function declines until eventual failure. The pathogenesis of ovarian aging is complex and diverse; oxidative stress (OS) is considered to be a key factor. This review focuses on the fact that OS status accelerates the ovarian aging process by promoting apoptosis, inflammation, mitochondrial damage, telomere shortening and biomacromolecular damage. Current evidence suggests that aging, smoking, high-sugar diets, pressure, superovulation, chemotherapeutic agents and industrial pollutants can be factors that accelerate ovarian aging by exacerbating OS status. In addition, we review the role of nuclear factor E2-related factor 2 (Nrf2), Sirtuin (Sirt), mitogen-activated protein kinase (MAPK), protein kinase B (AKT), Forkhead box O (FoxO) and Klotho signaling pathways during the process of ovarian aging. We also explore the role of antioxidant therapies such as melatonin, vitamins, stem cell therapies, antioxidant monomers and Traditional Chinese Medicine (TCM), and investigate the roles of these supplements with respect to the reduction of OS and the improvement of ovarian function. This review provides a rationale for antioxidant therapy to improve ovarian aging.
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Affiliation(s)
- Fei Yan
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Qi Zhao
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Ying Li
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Zhibo Zheng
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Xinliang Kong
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Chang Shu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China
| | - Yanfeng Liu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China.
| | - Yun Shi
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, People's Republic of China.
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Lai MC, Liu WY, Liou SS, Liu IM. The Citrus Flavonoid Hesperetin Encounters Diabetes-Mediated Alzheimer-Type Neuropathologic Changes through Relieving Advanced Glycation End-Products Inducing Endoplasmic Reticulum Stress. Nutrients 2022; 14:nu14040745. [PMID: 35215394 PMCID: PMC8874695 DOI: 10.3390/nu14040745] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 01/29/2022] [Accepted: 02/07/2022] [Indexed: 01/24/2023] Open
Abstract
The present study investigates whether hesperetin, a citrus flavonoid, can encounter advanced glycation end-product (AGE)-induced Alzheimer’s disease-like pathophysiological changes with the underlying mechanisms. SH-SY5Y cells pretreated with hesperetin before stimulation with AGEs (200 μg/mL) were assessed in the following experiments. Hesperetin (40 μmol/L) elevated the reduced cell viability induced by AGEs. Hesperetin ameliorated reactive oxygen species overproduction and the downregulation of superoxide dismutase, glutathione peroxidase, and catalase, triggered by AGEs. Amyloid precursor protein upregulation, accompanied by the increased production of Aβ, caused by AGEs, was reversed by hesperetin. However, hesperetin lowered β-site APP-cleaving enzyme 1 expression, inducing insulin-degrading and neprilysin expression. In addition, hesperetin downregulated the expressions of the AGEs-induced endoplasmic reticulum (ER) stress proteins, including 78-kDa glucose-regulated protein and C/EBP homologous protein, and lowered the phosphorylation of protein kinase R-like ER kinase and activating transcription factor 4. Hesperetin-pretreated cells had a minor apoptotic DNA fragmentation. Hesperetin is able to upregulate Bcl-2 protein expression, downregulate Bax expression, and decrease caspase-12/-9/-3 activity as well, indicating that it inhibits ER stress-mediated neuronal apoptosis. There is a similar effect between hesperetin and positive rosiglitazone control against Aβ aggravation of SH-SY5Y cell injury induced by AGEs. Thus, hesperetin might be a potential agent for treating glycation-induced Aβ neurotoxicity.
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Affiliation(s)
- Mei-Chou Lai
- Department of Pharmacy and Master Program, Collage of Pharmacy and Health Care, Tajen University, Pingtung County 90741, Taiwan; (M.-C.L.); (S.-S.L.)
| | - Wayne-Young Liu
- Department of Urology, Jen-Ai Hospital, Taichung City 41265, Taiwan;
- Center for Basic Medical Science, Collage of Health Science, Central Taiwan University of Science and Technology, Taichung City 40601, Taiwan
| | - Shorong-Shii Liou
- Department of Pharmacy and Master Program, Collage of Pharmacy and Health Care, Tajen University, Pingtung County 90741, Taiwan; (M.-C.L.); (S.-S.L.)
| | - I-Min Liu
- Department of Pharmacy and Master Program, Collage of Pharmacy and Health Care, Tajen University, Pingtung County 90741, Taiwan; (M.-C.L.); (S.-S.L.)
- Correspondence: ; Tel.: +886-8-7624002
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From dried bear bile to molecular investigation: A systematic review of the effect of bile acids on cell apoptosis, oxidative stress and inflammation in the brain, across pre-clinical models of neurological, neurodegenerative and neuropsychiatric disorders. Brain Behav Immun 2022; 99:132-146. [PMID: 34601012 DOI: 10.1016/j.bbi.2021.09.021] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/16/2021] [Accepted: 09/26/2021] [Indexed: 02/08/2023] Open
Abstract
Bile acids, mainly ursodeoxycholic acid (UDCA) and its conjugated species glycoursodeoxycholic acid (GUDCA) and tauroursodeoxycholic acid (TUDCA) have long been known to have anti-apoptotic, anti-oxidant and anti-inflammatory properties. Due to their beneficial actions, recent studies have started to investigate the effect of UDCA, GUDCA, TUDCA on the same mechanisms in pre-clinical models of neurological, neurodegenerative and neuropsychiatric disorders, where increased cell apoptosis, oxidative stress and inflammation in the brain are often observed. A total of thirty-five pre-clinical studies were identified through PubMed/Medline, Web of Science, Embase, PsychInfo, and CINAHL databases, investigating the role of the UDCA, GUDCA and TUDCA in the regulation of brain apoptosis, oxidative stress and inflammation, in pre-clinical models of neurological, neurodegenerative and neuropsychiatric disorders. Findings show that UDCA reduces apoptosis, reactive oxygen species (ROS) and tumour necrosis factor (TNF)-α production in neurodegenerative models, and reduces nitric oxide (NO) and interleukin (IL)-1β production in neuropsychiatric models; GUDCA decreases lactate dehydrogenase, TNF-α and IL-1β production in neurological models, and also reduces cytochrome c peroxidase production in neurodegenerative models; TUDCA decreases apoptosis in neurological models, reduces ROS and IL-1β production in neurodegenerative models, and decreases apoptosis and TNF-α production, and increases glutathione production in neuropsychiatric models. In addition, findings suggest that all the three bile acids would be equally beneficial in models of Huntington's disease, whereas UDCA and TUDCA would be more beneficial in models of Parkinson's disease and Alzheimer's disease, while GUDCA in models of bilirubin encephalopathy and TUDCA in models of depression. Overall, this review confirms the therapeutic potential of UDCA, GUDCA and TUDCA in neurological, neurodegenerative and neuropsychiatric disorders, proposing bile acids as potential alternative therapeutic approaches for patients suffering from these disorders.
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Karkin K, İzol V, Kaplan M, Değer M, Akdoğan N, Tansuğ MZ. Demonstration of advanced glycation end product (AGE) expression in bladder cancer tissue in type-2 diabetic and non-diabetic patients and the relationship between AGE accumulation and endoplasmic reticulum stress with bladder cancer. Int J Clin Pract 2021; 75:e14526. [PMID: 34120398 DOI: 10.1111/ijcp.14526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/12/2021] [Accepted: 06/11/2021] [Indexed: 11/30/2022] Open
Abstract
PURPOSE This study aimed to investigate the relationship between advanced glycation end product (AGE) expression and accumulation in transurethral resection (TUR-B) material taken from type-2 diabetes mellitus (DM) and non-DM bladder cancer patients and endoplasmic reticulum stress (ERS) with bladder cancer. METHOD The patients who had TUR-B between May 2016 and September 2018 were included in the study. After the tissue samples had been taken and frozen at -80°C, they were homogenised to be used in enzyme-linked immunosorbent assay (ELISA) experiments. The patients were grouped as DM and non-DM. In both groups, mean AGE, IRE1, PERK and ATF6 expression amounts were evaluated through ELISA method in the pathological material. RESULTS The expression amounts in tissue samples were AGE 0.59 ± 0.03 µg/mL, ATF6 1.08 ± 0.11 µg/mL, IRE1 30.71 ± 1.68 ng/mL, PERK 0.28 ± 0.02 ng. It was /mL. While there was no significant difference amongst AGE µg/mL (P = .146), ATF6 µg/mL (P = .175), IRE1 ng/mL (P = NA) and PERK ng/mL (P = .125) (P > .05) in the presence of DM, a positive correlation was observed between AGE values and PERK ng/mL values (r = .629; P < .05). CONCLUSION Bladder cancer may develop as a result of accumulation of AGEs and ERS. Demonstration of the expression of proteins resulting from AGEs and ERS may be useful biomarkers for the diagnosis, prognosis, prevention and development of treatment alternatives for bladder cancer.
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Affiliation(s)
- Kadir Karkin
- Department of Urology, Adana City Training and Research Hospital, Health Sciences University, Adana, Turkey
| | - Volkan İzol
- Department of Urology, Faculty of Medicine, University of Çukurova, Adana, Turkey
| | - Mahir Kaplan
- Department of Pharmacology, Faculty of Medicine, University of Çukurova, Adana, Turkey
| | - Mutlu Değer
- Department of Urology, Faculty of Medicine, University of Çukurova, Adana, Turkey
| | - Nebil Akdoğan
- Department of Urology, Faculty of Medicine, University of Çukurova, Adana, Turkey
| | - Mustafa Zühtü Tansuğ
- Department of Urology, Faculty of Medicine, University of Çukurova, Adana, Turkey
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Haddad M, Hervé V, Ben Khedher MR, Rabanel JM, Ramassamy C. Glutathione: An Old and Small Molecule with Great Functions and New Applications in the Brain and in Alzheimer's Disease. Antioxid Redox Signal 2021; 35:270-292. [PMID: 33637005 DOI: 10.1089/ars.2020.8129] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Significance: Glutathione (GSH) represents the most abundant and the main antioxidant in the body with important functions in the brain related to Alzheimer's disease (AD). Recent Advances: Oxidative stress is one of the central mechanisms in AD. We and others have demonstrated the alteration of GSH levels in the AD brain, its important role in the detoxification of advanced glycation end-products and of acrolein, a by-product of lipid peroxidation. Recent in vivo studies found a decrease of GSH in several areas of the brain from control, mild cognitive impairment, and AD subjects, which are correlated with cognitive decline. Critical Issues: Several strategies were developed to restore its intracellular level with the l-cysteine prodrugs or the oral administration of γ-glutamylcysteine to prevent alterations observed in AD. To date, no benefit on GSH level or on oxidative biomarkers has been reported in clinical trials. Thus, it remains uncertain if GSH could be considered a potential preventive or therapeutic approach or a biomarker for AD. Future Directions: We address how GSH-coupled nanocarriers represent a promising approach for the functionalization of nanocarriers to overcome the blood/brain barrier (BBB) for the brain delivery of GSH while avoiding cellular toxicity. It is also important to address the presence of GSH in exosomes for its potential intercellular transfer or its shuttle across the BBB under certain conditions. Antioxid. Redox Signal. 35, 270-292.
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Affiliation(s)
- Mohamed Haddad
- INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Canada.,Institute on Nutrition and Functional Foods, Université Laval, Québec, Canada
| | - Vincent Hervé
- INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Canada.,Institute on Nutrition and Functional Foods, Université Laval, Québec, Canada
| | - Mohamed Raâfet Ben Khedher
- INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Canada.,Institute on Nutrition and Functional Foods, Université Laval, Québec, Canada
| | | | - Charles Ramassamy
- INRS-Centre Armand-Frappier Santé Biotechnologie, Laval, Canada.,Institute on Nutrition and Functional Foods, Université Laval, Québec, Canada
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Li W, Wang S, Wang H, Wang J, Jin F, Fang F, Fang C. Astragaloside IV prevents memory impairment in D-galactose-induced aging rats via the AGEs/RAGE/ NF-κB axis. Arch Med Res 2021; 53:20-28. [PMID: 34217517 DOI: 10.1016/j.arcmed.2021.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 04/05/2021] [Accepted: 05/26/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND We investigated the effects of astragaloside IV (AS-IV) on memory function in aging rats mimicked by D-galactose administration and explored the potential molecular mechanisms. METHODS Twenty-seven male rats were randomly divided into control group (N = 9), model group (N = 9), and AS-IV treated group (N = 9). Aging model was stimulated by D-galactose (400 mg/kg/d, i.p., dissolved in saline) for 8 weeks in rats. The general status of the rats was observed weekly. Learning and memory function was determined using the eight-arm radical maze and step-down test. Pathological changes in the hippocampal CA1 region were determined by hematoxylin and eosin staining. Organ indexes, superoxide dismutase (SOD) activity and malonaldehyde (MDA) content in the serum were measured. Expression of advanced glycation end products (AGEs), receptor for AGEs (RAGE), nuclear factor-κB (NF-κB), interleukin (IL)-6, IL-1β and tumor necrosis factor-α (TNF-α) were detected by enzyme-linked immunosorbent assay, real-time polymerase chain reaction or western blotting. RESULTS AS-IV improved the general status of the aging rats induced by D-galactose, prevented the impairment of memory function, organ indexes, and the pathological damage of the hippocampus. From the prospective of oxidative stress, AS-IV increased sera SOD activity and decreased MDA content. Additionally, AS-IV also reduced the inflammatory response by reducing hippocampal IL-1β, TNF-α, and IL-6 expression. Importantly, AS-IV prevented D-galactose-induced expression of AGEs, RAGE and NF-κB in the hippocampus. CONCLUSION AS-IV could prevent D-galactose-induced aging and memory impairment in rats, likely via regulation of inflammatory response, which was modulated by AGEs/RAGE/NF-κB axis.
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Affiliation(s)
- Wei Li
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Shuo Wang
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Hao Wang
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Jiepeng Wang
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Feng Jin
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Fang Fang
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Chaoyi Fang
- Hebei University of Chinese Medicine, Shijiazhuang 050200, China; Hebei Key Laboratory of Chinese Medicine Research on Cardio-cerebrovascular Disease, Shijiazhuang 050091, China.
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Selke P, Rosenstock P, Bork K, Strauss C, Horstkorte R, Scheer M. Glycation of benign meningioma cells leads to increased invasion. Biol Chem 2021; 402:849-859. [PMID: 33725749 DOI: 10.1515/hsz-2020-0376] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 02/26/2021] [Indexed: 12/21/2022]
Abstract
Meningiomas are the most common non-malignant intracranial tumors. Like most tumors, meningiomas prefer anaerobic glycolysis for energy production (Warburg effect). This leads to an increased synthesis of the metabolite methylglyoxal (MGO). This metabolite is known to react with amino groups of proteins. This reaction is called glycation, thereby building advanced glycation endproducts (AGEs). In this study, we investigated the influence of glycation on two meningioma cell lines, representing the WHO grade I (BEN-MEN-1) and the WHO grade III (IOMM-Lee). Increasing MGO concentrations led to the formation of AGEs and decreased growth in both cell lines. When analyzing the influence of glycation on adhesion, chemotaxis and invasion, we could show that the glycation of meningioma cells resulted in increased invasive potential of the benign meningioma cell line, whereas the invasive potential of the malignant cell line was reduced. In addition, glycation increased the E-cadherin- and decreased the N-cadherin-expression in BEN-MEN-1 cells, but did not affect the cadherin-expression in IOMM-Lee cells.
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Affiliation(s)
- Philipp Selke
- Medical Faculty, Institute for Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, D-06114Halle/Saale, Germany
| | - Philip Rosenstock
- Medical Faculty, Institute for Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, D-06114Halle/Saale, Germany
| | - Kaya Bork
- Medical Faculty, Institute for Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, D-06114Halle/Saale, Germany
| | - Christian Strauss
- Department for Neurosurgery, University Hospital Halle, D-06120Halle/Saale, Germany
| | - Rüdiger Horstkorte
- Medical Faculty, Institute for Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, D-06114Halle/Saale, Germany
| | - Maximilian Scheer
- Medical Faculty, Institute for Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, D-06114Halle/Saale, Germany
- Department for Neurosurgery, University Hospital Halle, D-06120Halle/Saale, Germany
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Takeuchi M, Sakasai-Sakai A, Takata T, Takino JI, Koriyama Y, Kikuchi C, Furukawa A, Nagamine K, Hori T, Matsunaga T. Intracellular Toxic AGEs (TAGE) Triggers Numerous Types of Cell Damage. Biomolecules 2021; 11:biom11030387. [PMID: 33808036 PMCID: PMC8001776 DOI: 10.3390/biom11030387] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 12/12/2022] Open
Abstract
The habitual intake of large amounts of sugar, which has been implicated in the onset/progression of lifestyle-related diseases (LSRD), induces the excessive production of glyceraldehyde (GA), an intermediate of sugar metabolism, in neuronal cells, hepatocytes, and cardiomyocytes. Reactions between GA and intracellular proteins produce toxic advanced glycation end-products (toxic AGEs, TAGE), the accumulation of which contributes to various diseases, such as Alzheimer’s disease, non-alcoholic steatohepatitis, and cardiovascular disease. The cellular leakage of TAGE affects the surrounding cells via the receptor for AGEs (RAGE), thereby promoting the onset/progression of LSRD. We demonstrated that the intracellular accumulation of TAGE triggered numerous cellular disorders, and also that TAGE leaked into the extracellular space, thereby increasing extracellular TAGE levels in circulating fluids. Intracellular signaling and the production of reactive oxygen species are affected by extracellular TAGE and RAGE interactions, which, in turn, facilitate the intracellular generation of TAGE, all of which may contribute to the pathological changes observed in LSRD. In this review, we discuss the relationships between intracellular TAGE levels and numerous types of cell damage. The novel concept of the “TAGE theory” is expected to open new perspectives for research into LSRD.
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Affiliation(s)
- Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
- Correspondence: ; Tel.: +81-76-218-8456
| | - Akiko Sakasai-Sakai
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
| | - Takanobu Takata
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Ishikawa 920-0293, Japan; (A.S.-S.); (T.T.)
| | - Jun-ichi Takino
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan; (J.-i.T.); (T.H.)
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka, Mie 513-8670, Japan; (Y.K.); (A.F.)
| | - Chigusa Kikuchi
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan; (C.K.); (T.M.)
| | - Ayako Furukawa
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki, Suzuka, Mie 513-8670, Japan; (Y.K.); (A.F.)
| | - Kentaro Nagamine
- Department of Clinical Nutrition, Faculty of Health Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan;
| | - Takamitsu Hori
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan; (J.-i.T.); (T.H.)
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan; (C.K.); (T.M.)
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12
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Jahan H, Choudhary MI. Gliclazide alters macrophages polarization state in diabetic atherosclerosis in vitro via blocking AGE-RAGE/TLR4-reactive oxygen species-activated NF-kβ nexus. Eur J Pharmacol 2021; 894:173874. [PMID: 33460615 DOI: 10.1016/j.ejphar.2021.173874] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/07/2021] [Accepted: 01/11/2021] [Indexed: 12/17/2022]
Abstract
Hyperglycemic milieu in diabetes mellitus stimulates macrophages for exaggerated pro-inflammatory cytokine response, particularly IL-1β, IL-6, and TNF-α. Although hyperglycemia causes macrophages to produce pro-inflammatory cytokines, AGEs (advanced glycation end products) active inflammation, produced as a result of chronic hyperglycemia, inducers cause polarization of macrophages into pro-inflammatory M1 phenotype. AGEs in diabetes accelerate atherosclerotic plaque initiation and progression via promoting macrophages polarization towards pro-inflammatory state. Gliclazide (Glz) is a well known antidiabetic drug with excellent safety profile. Its repurposing in the management of diabetes-associated late complications has tremendous merit. The present study demonstrated that Glz retards diabetic atherosclerotic progression, and cytokines storm in a concentration dependent manner over a concentration range of 1-100 μM than those of AGEs (200 μg/ml)-treated cells through a mechanism that alters macrophage M1 polarization state. Glz exerted these beneficial effects, independent of its antidiabetic effect. Glz pretreatment significantly (P < 0.05) inhibited the AGEs-induced pro-inflammatory mediators (NO•, reactive oxygen species, i-NOS), and production of pro-inflammatory cytokines, including IL-1β, IL-6, and TNF-α. It also significantly (P < 0.05) promoted the production of anti-inflammatory cytokines (IL-10 and TGF-β) in RAW 264.7 mouse macrophages. Glz pretreatment also effectively abated the AGEs-induced RAGE (~2-fold decrease), and CD86 surface marker expressions (P < 0.001 at 100 μM) on macrophages by inhibiting the NF-kβ activation in a concentration dependent manner (1-100 μM) (P < 0.001). In conclusion, our data demonstrates that Glz alleviates the diabetic atherosclerosis progression by ameliorating the AGEs-mediated M1 pro-inflammatory phenotype via blocking AGE-RAGE/TLR4-reactive oxygen species -activated NF-kβ nexus in macrophages.
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Affiliation(s)
- Humera Jahan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Science, University of Karachi, Karachi, 75270, Pakistan.
| | - M Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Science, University of Karachi, Karachi, 75270, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Science, University of Karachi, Karachi, 75270, Pakistan; Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Komplek Kampus C, JI. Mulyorejo, Surabaya, 60115, Indonesia.
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13
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Jayachandran P, Koshy L, Sudhakaran PR, Nair GM, Gangaprasad A, Nair AJ. Dysregulation of miRNA and its reversal with l-ascorbic acid during AGE-BSA induced ER stress in Mus musculus neuronal cells. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100841] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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14
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Yin Q, Chen J, Ma S, Dong C, Zhang Y, Hou X, Li S, Liu B. Pharmacological Inhibition of Galectin-3 Ameliorates Diabetes-Associated Cognitive Impairment, Oxidative Stress and Neuroinflammation in vivo and in vitro. J Inflamm Res 2020; 13:533-542. [PMID: 32982368 PMCID: PMC7508034 DOI: 10.2147/jir.s273858] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/01/2020] [Indexed: 12/15/2022] Open
Abstract
Background In diabetes, cognitive impairment is linked with oxidative stress and neuroinflammation. As the only chimeric member of the galectin family, galectin-3 (Gal3) induces neuroinflammation and cognitive impairment in models of Alzheimer’s disease (AD); however, its role in diabetes-associated cognitive impairment is not established. Methodology Here, we investigated the effects of Gal3 inhibition on cognitive impairment and the possible underlying molecular events in diabetes. We investigated the effects of the Gal3 inhibitor modified citrus pectin (MCP; 100 mg/kg/day oral for 6 weeks) in vivo in high-fat diet (HFD)/streptozotocin (STZ)-induced diabetic rats. Additionally, the effects of MCP on high glucose (HG)-stimulated BV-2 microglial cells were investigated in vitro. Results We found that MCP attenuated memory impairment in diabetic rats in the Morris water maze test and reduced insulin resistance, oxidative stress, and neuroinflammation. In HG-stimulated BV-2 microglial cells, MCP increased cell viability and decreased oxidative stress and the production of proinflammatory cytokines. Conclusion The results of this study indicate that the inhibition of Gal3 by MCP ameliorates diabetes-associated cognitive impairment, oxidative stress, and neuroinflammation, suggesting that Gal3 could be a potential new target for therapeutic intervention to prevent cognitive impairment in diabetes.
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Affiliation(s)
- Qingqing Yin
- Department of Geriatric Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, People's Republic of China.,School of Medicine, Shandong University, Jinan 250021, People's Republic of China.,Department of Geriatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, People's Republic of China
| | - Jian Chen
- Department of Geriatric Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, People's Republic of China
| | - Shizhan Ma
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, People's Republic of China
| | - Chuanfang Dong
- Department of Geriatrics, Jinan Hospital, Jinan, Shandong 250013, People's Republic of China
| | - Yue Zhang
- School of Medicine, Shandong University, Jinan 250021, People's Republic of China.,Department of Geriatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, People's Republic of China
| | - Xunyao Hou
- Department of Geriatric Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, People's Republic of China
| | - Shangbin Li
- Department of Geriatric Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, People's Republic of China.,Department of Geriatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, People's Republic of China
| | - Bin Liu
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, People's Republic of China.,Department of Neurology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan 250014, People's Republic of China
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15
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Leonova T, Popova V, Tsarev A, Henning C, Antonova K, Rogovskaya N, Vikhnina M, Baldensperger T, Soboleva A, Dinastia E, Dorn M, Shiroglasova O, Grishina T, Balcke GU, Ihling C, Smolikova G, Medvedev S, Zhukov VA, Babakov V, Tikhonovich IA, Glomb MA, Bilova T, Frolov A. Does Protein Glycation Impact on the Drought-Related Changes in Metabolism and Nutritional Properties of Mature Pea ( Pisum sativum L.) Seeds? Int J Mol Sci 2020; 21:E567. [PMID: 31952342 PMCID: PMC7013545 DOI: 10.3390/ijms21020567] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/01/2020] [Accepted: 01/03/2020] [Indexed: 12/24/2022] Open
Abstract
Protein glycation is usually referred to as an array of non-enzymatic post-translational modifications formed by reducing sugars and carbonyl products of their degradation. The resulting advanced glycation end products (AGEs) represent a heterogeneous group of covalent adducts, known for their pro-inflammatory effects in mammals, and impacting on pathogenesis of metabolic diseases and ageing. In plants, AGEs are the markers of tissue ageing and response to environmental stressors, the most prominent of which is drought. Although water deficit enhances protein glycation in leaves, its effect on seed glycation profiles is still unknown. Moreover, the effect of drought on biological activities of seed protein in mammalian systems is still unstudied with respect to glycation. Therefore, here we address the effects of a short-term drought on the patterns of seed protein-bound AGEs and accompanying alterations in pro-inflammatory properties of seed protein in the context of seed metabolome dynamics. A short-term drought, simulated as polyethylene glycol-induced osmotic stress and applied at the stage of seed filling, resulted in the dramatic suppression of primary seed metabolism, although the secondary metabolome was minimally affected. This was accompanied with significant suppression of NF-kB activation in human SH-SY5Y neuroblastoma cells after a treatment with protein hydrolyzates, isolated from the mature seeds of drought-treated plants. This effect could not be attributed to formation of known AGEs. Most likely, the prospective anti-inflammatory effect of short-term drought is related to antioxidant effect of unknown secondary metabolite protein adducts, or down-regulation of unknown plant-specific AGEs due to suppression of energy metabolism during seed filling.
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Affiliation(s)
- Tatiana Leonova
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Veronika Popova
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Alexander Tsarev
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Christian Henning
- Institute of Chemistry - Food Chemistry, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany
| | - Kristina Antonova
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Nadezhda Rogovskaya
- Research Institute of Hygiene, Occupational Pathology and Human Ecology, 188663 Leningrad Oblast, Russia
| | - Maria Vikhnina
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Tim Baldensperger
- Institute of Chemistry - Food Chemistry, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany
| | - Alena Soboleva
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Ekaterina Dinastia
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
- Postovsky Institute of Organic Synthesis of Ural Division of Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Mandy Dorn
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Olga Shiroglasova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Tatiana Grishina
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
| | - Gerd U Balcke
- Department of Metabolic and Cell Biology, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
| | - Christian Ihling
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany
| | - Galina Smolikova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Sergei Medvedev
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Vladimir A Zhukov
- All-Russia Research Institute for Agricultural Microbiology, 196608 St. Petersburg, Russia
| | - Vladimir Babakov
- Research Institute of Hygiene, Occupational Pathology and Human Ecology, 188663 Leningrad Oblast, Russia
| | - Igor A Tikhonovich
- All-Russia Research Institute for Agricultural Microbiology, 196608 St. Petersburg, Russia
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Marcus A Glomb
- Institute of Chemistry - Food Chemistry, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany
| | - Tatiana Bilova
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Andrej Frolov
- Department of Biochemistry, St. Petersburg State University, 199004 St. Petersburg, Russia
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany
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16
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Szczepanik JC, Garcia AF, Lopes de Almeida GR, Cunha MP, Dafre AL. Protective effects against memory impairment induced by methylglyoxal in mice co-treated with FPS-ZM1, an advanced glycation end products receptor antagonist. Acta Neurobiol Exp (Wars) 2020. [DOI: 10.21307/ane-2020-033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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17
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Lojpur T, Easton Z, Raez-Villanueva S, Laviolette S, Holloway AC, Hardy DB. Δ9-Tetrahydrocannabinol leads to endoplasmic reticulum stress and mitochondrial dysfunction in human BeWo trophoblasts. Reprod Toxicol 2019; 87:21-31. [PMID: 31054322 DOI: 10.1016/j.reprotox.2019.04.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/05/2019] [Accepted: 04/30/2019] [Indexed: 02/07/2023]
Abstract
While studies have demonstrated that the main psychoactive component of cannabis, Δ9-tetrahydrocannabinol (Δ9-THC) alone induces placental insufficiency and fetal growth restriction, the underlying mechanisms remain elusive. Given that both (i) endoplasmic reticulum (ER) stress in pregnancy and (ii) gestational exposure to Δ9-THC leads to placental deficiency, we hypothesized that Δ9-THC may directly induce placental ER stress, influencing trophoblast gene expression and mitochondrial function. BeWo human trophoblast cells treated with Δ9-THC (3-30 μM) led to a dose-dependent increase in all ER stress markers and CHOP; these effects could be blocked with CB1R/CB2R antagonists. Moreover, expression of ER stress-sensitive genes ERRγ, VEGFA, and FLT-1 were increased by Δ9-THC, and abrogated with the ER stress inhibitor TUDCA. Δ9-THC also diminished mitochondrial respiration and ATP-coupling due to decreased abundance of mitochondrial chain complex proteins. Collectively, these findings indicate that Δ9-THC can directly augment ER stress resulting in aberrant placental gene expression and impaired mitochondrial function.
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Affiliation(s)
- Tina Lojpur
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada; Departments of Obstetrics and Gynecology, Children's Health Research Institute, Lawson, Health Research Institute, Western University, London, Ontario, Canada
| | - Zachary Easton
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada; Departments of Obstetrics and Gynecology, Children's Health Research Institute, Lawson, Health Research Institute, Western University, London, Ontario, Canada
| | | | - Steven Laviolette
- Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada
| | - Alison C Holloway
- Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada
| | - Daniel B Hardy
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada; Departments of Obstetrics and Gynecology, Children's Health Research Institute, Lawson, Health Research Institute, Western University, London, Ontario, Canada.
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18
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Wei Q, Liu T, Sun DW. Advanced glycation end-products (AGEs) in foods and their detecting techniques and methods: A review. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.09.020] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Ghelani H, Razmovski-Naumovski V, Pragada RR, Nammi S. Attenuation of Glucose-Induced Myoglobin Glycation and the Formation of Advanced Glycation End Products (AGEs) by (R)-α-Lipoic Acid In Vitro. Biomolecules 2018; 8:biom8010009. [PMID: 29419812 PMCID: PMC5871978 DOI: 10.3390/biom8010009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/26/2018] [Accepted: 02/01/2018] [Indexed: 11/16/2022] Open
Abstract
High-carbohydrate containing diets have become a precursor to glucose-mediated protein glycation which has been linked to an increase in diabetic and cardiovascular complications. The aim of the present study was to evaluate the protective effect of (R)-α-lipoic acid (ALA) against glucose-induced myoglobin glycation and the formation of advanced glycation end products (AGEs) in vitro. Methods: The effect of ALA on myoglobin glycation was determined via the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine. The extent of glycation-induced myoglobin oxidation was measured via the levels of protein carbonyl and thiol. Results: The results showed that the co-incubation of ALA (1, 2 and 4 mM) with myoglobin (1 mg/mL) and glucose (1 M) significantly decreased the levels of fructosamine, which is directly associated with the decrease in the formation of AGEs. Furthermore, ALA significantly reduced the release of free iron from myoglobin which is attributed to the protection of myoglobin from glucose-induced glycation. The results also demonstrated a significant protective effect of ALA on myoglobin from oxidative damage, as seen from the decreased protein carbonyls and increased protein thiols. Conclusion: The anti-glycation properties of ALA suggest that ALA supplementation may be beneficial in the prevention of AGEs-mediated diabetic and cardiovascular complications.
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Affiliation(s)
- Hardik Ghelani
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
| | - Valentina Razmovski-Naumovski
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
- South Western Sydney Clinical School, School of Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Rajeswara Rao Pragada
- Department of Pharmacology, College of Pharmaceutical Sciences, Andhra University, Visakhapatnam 530003, Andhra Pradesh, India.
| | - Srinivas Nammi
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
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Ghelani H, Razmovski-Naumovski V, Pragada RR, Nammi S. (R)-α-Lipoic acid inhibits fructose-induced myoglobin fructation and the formation of advanced glycation end products (AGEs) in vitro. Altern Ther Health Med 2018; 18:13. [PMID: 29334926 PMCID: PMC5769525 DOI: 10.1186/s12906-017-2076-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 12/29/2017] [Indexed: 12/20/2022]
Abstract
Background Fructose-mediated protein glycation (fructation) has been linked to an increase in diabetic and cardiovascular complications due to over consumption of high-fructose containing diets in recent times. The objective of the present study is to evaluate the protective effect of (R)-α-lipoic acid (ALA) against fructose-induced myoglobin fructation and the formation of advanced glycation end products (AGEs) in vitro. Methods The anti-glycation activity of ALA was determined using the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine. The fructation-induced myoglobin oxidation was examined using the level of protein carbonyl content and thiol group estimation. Results The results showed that co-incubation of myoglobin (1 mg/mL), fructose (1 M) and ALA (1, 2 and 4 mM) significantly inhibited the formation of AGEs during the 30 day study period. ALA markedly decreased the levels of fructosamine, which is directly associated with the reduction of AGEs formation. Furthermore, ALA significantly reduced free iron release from myoglobin which is attributed to the protection of myoglobin from fructose-induced glycation. The results also demonstrated a significant protective effect of ALA on myoglobin oxidative damages, as seen from decreased protein carbonyl content and increased protein thiols. Conclusion These findings provide new insights into the anti-glycation properties of ALA and emphasize that ALA supplementation is beneficial in the prevention of AGEs-mediated diabetic and cardiovascular complications.
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Ohtsu A, Shibutani Y, Seno K, Iwata H, Kuwayama T, Shirasuna K. Advanced glycation end products and lipopolysaccharides stimulate interleukin-6 secretion via the RAGE/TLR4-NF-κB-ROS pathways and resveratrol attenuates these inflammatory responses in mouse macrophages. Exp Ther Med 2017; 14:4363-4370. [PMID: 29067115 DOI: 10.3892/etm.2017.5045] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 02/14/2017] [Indexed: 12/20/2022] Open
Abstract
Macrophages are essential for regulating the physiology of pregnancy; however, excessive inflammatory responses to macrophages, induced by infection and/or endogenous danger signals, may potentially result in complications during pregnancy. Advanced glycation end-products (AGE) and lipopolysaccharides (LPS) are known to induce inflammation and are associated with adverse developmental outcomes. The aim of the present study was to examine the effect of AGE and LPS on cytokines in the J774 murine macrophage cell line and the potential effect of resveratrol on AGE- and LPS-induced inflammation in macrophages. AGE and LPS significantly increased IL-6 mRNA expression and secretion in J774 macrophages (P<0.05). Although AGE and LPS significantly stimulated IL-1β mRNA expression (P<0.05), they had no significant effect on IL-1β secretion. To assess the receptors for AGE and LPS, including receptor for AGE (RAGE) and Toll-like receptor (TLR4), blocking reagents (RAGE antagonist or TLR4 inhibitor) were added to the J774 macrophages. IL-6 secretion induced by AGE or LPS was significantly inhibited by pretreatment with RAGE antagonist (P<0.05) or TLR4 inhibitor (P<0.05). IL-6 secretion was dependent on nuclear factor (NF)-κB activation and the production of reactive oxygen species (ROS; P<0.05). Resveratrol suppressed mRNA expression and intracellular IL-6 production, resulting in significantly decreased IL-6 secretion after treatment with LPS or AGE (P<0.01). Furthermore, treatment with Ex527, which is a sirtuin-1 (SIRT1) inhibitor, significantly attenuated the anti-inflammatory effect of resveratrol (P<0.05), and treatment with 5-aminoimidazole-4-carboxamide ribonucleotide, which is a 5' adenosine monophosphate-activated protein kinase (AMPK) activator, resulted in a significant decrease in IL-6 secretion in J774 macrophages (P<0.05). The results of the present study indicated that AGE and LPS increase IL-6 secretion depending on NF-κB activation and ROS production through RAGE and/or TLR4 in the J774 murine macrophage cell line. Based on the present study, resveratrol appears to be an effective regulator of the inflammatory responses associated with SIRT1 and AMPK activation in macrophages. These results suggest that resveratrol may have therapeutic applications for controlling immune responses during pregnancy.
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Affiliation(s)
- Ayaka Ohtsu
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
| | - Yui Shibutani
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
| | - Kotomi Seno
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
| | - Hisataka Iwata
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
| | - Takehito Kuwayama
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
| | - Koumei Shirasuna
- Laboratory of Animal Reproduction, Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa 234-0034, Japan
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RAGE-Specific Inhibitor FPS-ZM1 Attenuates AGEs-Induced Neuroinflammation and Oxidative Stress in Rat Primary Microglia. Neurochem Res 2017; 42:2902-2911. [DOI: 10.1007/s11064-017-2321-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/22/2017] [Accepted: 06/02/2017] [Indexed: 12/13/2022]
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Zhou H, Ding L, Wu Z, Cao X, Zhang Q, Lin L, Bian JS. Hydrogen sulfide reduces RAGE toxicity through inhibition of its dimer formation. Free Radic Biol Med 2017; 104:262-271. [PMID: 28108276 DOI: 10.1016/j.freeradbiomed.2017.01.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 12/30/2016] [Accepted: 01/16/2017] [Indexed: 12/11/2022]
Abstract
RAGE is important in the development of neurodegenerative diseases. The present study was designed to investigate the effect of hydrogen sulfide (H2S, an endogenous gaseous mediator) on the cytotoxicity caused by RAGE activation during the chronic oxidative stress. Aβ1-42 decreased cell viability and induced cell senescence in SH-SY5Y cells. Treatment with advanced glycation end products (AGEs) induced cell injury in HEK293 cells stably expressing RAGE (HEK293-RAGE) and stimulated inflammatory responses in SH-SY5Y cells. Pretreatment of SH-SY5Y cells with an H2S donor, NaHS, significantly attenuated the above harmful effects caused by Aβ1-42 or AGEs. Western blotting analysis shows that oxidative stress enhanced RAGE protein expression which was attenuated by either NaHS or over-expression of cystathionine β-synthase (CBS), a critical enzyme for producing H2S in brain cells. Both Western blots and split GFP complementation analysis demonstrate that NaHS reduced H2O2-enhanced RAGE dimerization. Immunofluorescence analysis shows that H2O2 up-regulated the membrane expression of wild-type RAGE. However, H2O2-enhanced expression of the RAGE harboring C259S/C310S double mutation (DM-RAGE) was observed in the endoplasmic reticulum. Treatment with NaHS attenuated the effects of H2O2 on the protein expression of WT-RAGE, but not that of DM-RAGE. Cycloheximide chase and ubiquitination assays show that NaHS reduced the half-life of WT-RAGE to a similar level of DM-RAGE. S-sulfhydration assay with the tag-switch technique demonstrate that H2S may directly S-sulfhydrate the C259/C301 residues. Our data suggest that H2S reduces RAGE dimer formation and impairs its membrane stability. The lowered plasma membrane abundance of RAGE therefore helps to protect cells against various RAGE mediated pathological effects.
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Affiliation(s)
- Hong Zhou
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Lei Ding
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Zhiyuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore; Life Science Institute, National University of Singapore, Singapore
| | - Xu Cao
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Qichun Zhang
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore
| | - Li Lin
- Laboratory of Cardiovascular Sciences, National Institute on Aging, Baltimore, MD 21224, USA
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 117600 Singapore, Singapore; Life Science Institute, National University of Singapore, Singapore.
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Wong MK, Holloway AC, Hardy DB. Nicotine Directly Induces Endoplasmic Reticulum Stress Response in Rat Placental Trophoblast Giant Cells. Toxicol Sci 2016; 151:23-34. [PMID: 26803847 DOI: 10.1093/toxsci/kfw019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Nicotine exposure during pregnancy leads to placental insufficiency impairing both fetal and neonatal development. Previous studies from our laboratory have demonstrated that in rats, nicotine augmented endoplasmic reticulum (ER) stress in association with placental insufficiency; however, the underlying mechanisms remain elusive. Therefore, we sought to investigate the possible direct effect of nicotine on ER stress in Rcho-1 rat placental trophoblast giant (TG) cells during differentiation. Protein and/or mRNA expression of markers involved in ER stress (eg, phosphorylated PERK, eIF2α, CHOP, and BiP/GRP78) and TG cell differentiation and function (eg, Pl-1, placental growth factor [Pgf], Hsd11b1, and Hsd11b2) were quantified via Western blot or real-time polymerase chain reaction. Nicotine treatment led to dose-dependent increases in the phosphorylation of PERK[Thr981] and eIF2α[Ser51], whereas pretreatment with a nicotinic acetylcholine receptor (nAChR) antagonist (mecamylamine hydrochloride) blocked the induction of PERK phosphorylation, verifying the direct involvement of nicotine and nAChR binding. We next investigated select target genes known to play essential roles in placental TG cell differentiation and function (Pl-1, Pgf, Hsd11b1, and Hsd11b2), and found that nicotine significantly augmented the mRNA levels of Hsd11b1 in a dose-dependent manner. Furthermore, using tauroursodeoxycholic acid, a safe bile acid known to improve protein chaperoning and folding, we were able to prevent nicotine-induced increases in both PERK phosphorylation and Hsd11b1 mRNA levels, revealing a potential novel therapeutic approach to reverse the deleterious effects of nicotine exposure in pregnancy. Collectively, these results implicate that nicotine, acting through its receptor, can directly augment ER stress and impair placental function.
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Affiliation(s)
- Michael K Wong
- *Department of Physiology and Pharmacology, Western University, London, Ontario, Canada N6A 5C1
| | - Alison C Holloway
- Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada L8S 4K1
| | - Daniel B Hardy
- *Department of Physiology and Pharmacology, Western University, London, Ontario, Canada N6A 5C1 Departments of Obstetrics and Gynecology, Children's Health Research Institute, Lawson, Health Research Institute, Western University, London, Ontario, Canada N6A 5C1
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Hong Y, Shen C, Yin Q, Sun M, Ma Y, Liu X. Effects of RAGE-Specific Inhibitor FPS-ZM1 on Amyloid-β Metabolism and AGEs-Induced Inflammation and Oxidative Stress in Rat Hippocampus. Neurochem Res 2016; 41:1192-9. [DOI: 10.1007/s11064-015-1814-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 12/18/2015] [Accepted: 12/21/2015] [Indexed: 10/22/2022]
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26
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Park SY, Je JY, Ahn CB. Phenolic Composition and Hepatoprotective Activities of A
llium Hookeri
Against Hydrogen-Peroxide-Induced Oxidative Stress in Cultured Hepatocytes. J Food Biochem 2015. [DOI: 10.1111/jfbc.12225] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Soo Yeon Park
- Department of Food Technology and Nutrition; Chonnam National University; Yeosu 59626 Korea
| | - Jae-Young Je
- Department of Marine-Bio Convergence Science; Pukyong National University; Busan 48547 Korea
| | - Chang-Bum Ahn
- Department of Food Technology and Nutrition; Chonnam National University; Yeosu 59626 Korea
- Division of Food and Nutrition; Chonnam National University; Gwangju 61186 Korea
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Muth IE, Zschüntzsch J, Kleinschnitz K, Wrede A, Gerhardt E, Balcarek P, Schreiber-Katz O, Zierz S, Dalakas MC, Voll RE, Schmidt J. HMGB1 and RAGE in skeletal muscle inflammation: Implications for protein accumulation in inclusion body myositis. Exp Neurol 2015; 271:189-97. [PMID: 26048613 DOI: 10.1016/j.expneurol.2015.05.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 05/23/2015] [Accepted: 05/30/2015] [Indexed: 01/26/2023]
Abstract
Inflammation is associated with protein accumulation in IBM, but precise mechanisms are elusive. The "alarmin" HMGB1 is upregulated in muscle inflammation. Its receptor RAGE is crucial for β-amyloid-associated neurodegeneration. Relevant signaling via HMGB1/RAGE is expected in IBM pathology. By real-time-PCR, mRNA-expression levels of HMGB1 and RAGE were upregulated in muscle biopsies of patients with IBM and PM, but not in muscular dystrophy or non-myopathic controls. By immunohistochemistry, both molecules displayed the highest signal in IBM, where they distinctly co-localized to intra-fiber accumulations of β-amyloid and neurofilament/tau. In these fibers, identification of phosphorylated Erk suggested that relevant downstream activation is present upon HMGB1 signaling via RAGE. Protein expressions of HMGB1, RAGE, Erk and phosphorylated Erk were confirmed by Western blot. In a well established cell-culture model for pro-inflammatory cell-stress, exposure of human muscle-cells to IL-1β+IFN-γ induced cytoplasmic translocation of HMGB1 and subsequent release as evidenced by ELISA. Upregulation of RAGE on the cell surface was demonstrated by immunocytochemistry and flow-cytometry. Recombinant HMGB1 was equally potent as IL-1β+IFN-γ in causing amyloid-accumulation and cell-death, and both were abrogated by the HMGB1-blocker BoxA. The findings strengthen the concept of unique interactions between degenerative and inflammatory mechanisms and suggest that HMGB1/RAGE signaling is a critical pathway in IBM pathology.
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Affiliation(s)
- Ingrid E Muth
- Department of Neurology, University Medical Center, Göttingen, Germany
| | - Jana Zschüntzsch
- Department of Neurology, University Medical Center, Göttingen, Germany
| | - Konstanze Kleinschnitz
- Department of Neurology, University Medical Center, Göttingen, Germany; Department of Neuroimmunology, Institute for Multiple Sclerosis Research and Hertie Foundation, University Medical Center, Göttingen, Germany
| | - Arne Wrede
- Department of Neuropathology, University Medical Center, Göttingen, Germany
| | - Ellen Gerhardt
- Department of Neurodegeneration and Restorative Research, Center for Nanoscale Microscopy and Molecular Physiology of the Brain, University Medical Center Göttingen, Germany
| | - Peter Balcarek
- Department of Trauma Surgery, University Medical Center, Göttingen, Germany
| | - Olivia Schreiber-Katz
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of München, München, Germany
| | - Stephan Zierz
- Department of Neurology, University Hospital Halle/Saale, Halle/Saale, Germany
| | - Marinos C Dalakas
- Neuroimmunology Unit, Department of Pathophysiology, University of Athens Medical School, Athens, Greece; Department of Neurology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Reinhard E Voll
- Department of Rheumatology and Clinical Immunology, University Medical Center, Freiburg, Germany
| | - Jens Schmidt
- Department of Neurology, University Medical Center, Göttingen, Germany; Department of Neuroimmunology, Institute for Multiple Sclerosis Research and Hertie Foundation, University Medical Center, Göttingen, Germany.
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Guo R, Liu W, Liu B, Zhang B, Li W, Xu Y. SIRT1 suppresses cardiomyocyte apoptosis in diabetic cardiomyopathy: An insight into endoplasmic reticulum stress response mechanism. Int J Cardiol 2015; 191:36-45. [PMID: 25965594 DOI: 10.1016/j.ijcard.2015.04.245] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 04/05/2015] [Accepted: 04/30/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Endoplasmic reticulum (ER) stress-dependent apoptosis had been shown to occur in the hearts of people with diabetes, although the exact mechanisms are unclear. Sirtuin 1 (SIRT1), a nicotinamide adenine dinucleotide NAD(+)-dependent deacetylase, is known to play a role in diabetes-related complications as well as ER-stress. Therefore, we investigated the relationship between Sirtuin 1 (SIRT1) and ER stress-induced apoptosis in H9C2 cardiomyocyte. METHODS Diabetic rats were established by a single intraperitoneal injection of streptozotocin (STZ; 50mg/kg) with high-fat diet. For in vitro analysis, rat derived H9C2 cardiomyocytes were cultured. Cardiac function was assessed by Doppler, and SIRT1 as well as ER stress related protein expressions were measured by immunohistochemistry and western blotting. Cultured cells were exposed to advanced glycation end products (AGEs) (400μg/mL) for inducing ER stress and apoptosis. Cell apoptosis were detected by flow cytometry. RESULTS In vivo, ER stress was enhanced in the cardiomyocytes of diabetic rats without any treatments. A SIRT1 activator, resveratrol, could significantly restore cardiac function, reduce cardiomyocyte apoptosis, and ameliorate ER stress. In vitro, we showed that apoptosis and ER stress increased after AGE stimulation when SIRT1 expression was downregulated by short interfering RNA (siRNA) (p<0.05). However, resveratrol (10μM) restored SIRT1 levels in cardiomyocytes and markedly reduced ER stress-mediated apoptosis. CONCLUSION SIRT1 may attenuate ER stress-induced cardiomyocyte apoptosis via PERK/eIF2α, ATF6/CHOP, and IRE1α/JNK-mediated pathways. This study may provide insights into a novel underlying mechanism and a strategy for treating diabetic cardiomyopathy.
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Affiliation(s)
- Rong Guo
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China; Wadsworth Center, New York State Department of Health, Albany, NY 12201, USA.
| | - Weijing Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Baoxin Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Buchun Zhang
- Department of Cardiology, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, PR China
| | - Weiming Li
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China
| | - Yawei Xu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, PR China.
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Cytotoxin-induced NADPH oxides activation: roles in regulation of cell death. Arch Toxicol 2015; 89:991-1006. [PMID: 25690733 DOI: 10.1007/s00204-015-1476-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 02/09/2015] [Indexed: 02/07/2023]
Abstract
Numerous studies have shown that a variety of cytotoxic agents can activate the NADPH oxidase system and induce redox-dependent regulation of cellular functions. Cytotoxin-induced NADPH oxidase activation may either exert cytoprotective actions (e.g., survival, proliferation, and stress tolerance) or cause cell death. Here we summarize the experimental evidence showing the context-dependent dichotomous effects of NADPH oxidase on cell fate under cytotoxic stress conditions and the potential redox signaling mechanisms underlying this phenomenon. Clearly, it is difficult to create a unified paradigm on the toxicological implications of NADPH oxidase activation in response to cytotoxic stimuli. We suggest that interventional strategies targeting the NADPH oxidase system to prevent the adverse impacts of cytotoxins need to be contemplated in a stimuli- and cell type-specific manner.
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Yu T, Li L, Chen T, Liu Z, Liu H, Li Z. Erythropoietin attenuates advanced glycation endproducts-induced toxicity of Schwann cells in vitro. Neurochem Res 2015; 40:698-712. [PMID: 25585642 DOI: 10.1007/s11064-015-1516-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/20/2014] [Accepted: 01/07/2015] [Indexed: 12/17/2022]
Abstract
Advanced glycation endproducts (AGEs)-induced cytotoxicity is regarded as one of the main mechanisms responsible for neurological disorders. Although erythropoietin (EPO) is demonstrated to have neuroprotective effects in neurodegenerative diseases, the effects of EPO on AGEs-induced toxicity of Schwann cells (SCs) remain open for investigation. Primary cultured SCs isolated from 4 day-old Wistar rats were exposed to AGEs with or without EPO treatment for 5 days. AGEs decreased cell viability, increased apoptotic rate, elevated intracellular reactive oxygen species levels, and reduced total glutathione levels of SCs. The AGEs-induced toxic effects on SCs were partially blocked by AGER siRNA or AGER inhibitor FPS-ZM1. SCs exposed to AGEs exhibited higher mRNA and protein levels of receptor for AGEs (AGER), EPO, and EPO receptor (EPOR). Exogenous EPO treatment attenuated AGEs-induced oxidative stress and apoptosis probably by reducing the mRNA and protein expression of AGER. The protective effect of EPO against AGEs-induced toxicity was blocked by EPOR siRNA. The data of the present study gives, for the first time, evidence of the protective effects of EPO on SCs with AGEs-induced oxidative stress and apoptosis. These results imply that EPO might be a novel valuable agent for treating AGEs-induced toxicity.
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Affiliation(s)
- Ting Yu
- Department of Anatomy, Shandong University School of Medicine, 44 Wenhua Xi Road, Jinan, 250012, Shandong Province, China,
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31
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Li F, Zhao Z, Cai Z, Dong N, Liu Y. Oxidized Low-Density Lipoprotein Promotes Osteoblastic Differentiation of Valvular Interstitial Cells through RAGE/MAPK. Cardiology 2014; 130:55-61. [DOI: 10.1159/000369126] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 10/15/2014] [Indexed: 11/19/2022]
Abstract
Objectives: We have previously shown that oxidized low-density lipoprotein (oxLDL) promotes the osteogenic differentiation of valvular interstitial cells (VICs) by inducing endoplasmic reticulum (ER) stress. We also demonstrated the detrimental role of the receptor for advanced glycation end products (RAGE) activation and signaling in the development and progression of aortic valve (AV) calcification. Here, we test the hypothesis that oxLDL may induce the osteoblastic differentiation of VICs via RAGE. Methods: Cultured porcine aortic VICs were used in an in vitro model. The VICs were incubated with oxLDL for analysis, with and without RAGE siRNA. Results: We found that oxLDL markedly increased the expression of RAGE, induced high levels of proinflammatory cytokine production and promoted the osteoblastic differentiation and calcification of VICs. oxLDL also induced phosphorylation of p38 mitogen-activated protein kinase (MAPK) and c-Jun N-terminal kinase (JNK) MAPK. However, these effects were found to be markedly suppressed by siRNA silencing of RAGE. Conclusions: Our data provide evidence that RAGE mediates oxLDL-induced activation of p38 and JNK MAPK and the osteogenic differentiation of VICs.
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HUANG RONGRONG, HU WEN, YIN YANYAN, WANG YUCHAN, LI WEIPING, LI WEIZU. Chronic restraint stress promotes learning and memory impairment due to enhanced neuronal endoplasmic reticulum stress in the frontal cortex and hippocampus in male mice. Int J Mol Med 2014; 35:553-9. [DOI: 10.3892/ijmm.2014.2026] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 12/01/2014] [Indexed: 11/06/2022] Open
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Xing Y, Zhang X, Song X, Lv Z, Hou L, Li F. Injury of cortical neurons is caused by the advanced glycation end products-mediated pathway. Neural Regen Res 2014; 8:909-15. [PMID: 25206382 PMCID: PMC4145921 DOI: 10.3969/j.issn.1673-5374.2013.10.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 02/05/2013] [Indexed: 12/12/2022] Open
Abstract
Advanced glycation end products lead to cell apoptosis, and cause cell death by increasing endoplasmic reticulum stress. Advanced glycation end products alone may also directly cause damage to tissues and cells, but the precise mechanism remains unknown. This study used primary cultures of rat cerebral cortex neurons, and treated cells with different concentrations of glycation end products (50, 100, 200, 400 mg/L), and with an antibody for the receptor of advanced glycation end products before and after treatment with advanced glycation end products. The results showed that with increasing concentrations of glycation end products, free radical content increased in neurons, and the number of apoptotic cells increased in a dose-dependent manner. Before and after treatment of advanced glycation end products, the addition of the antibody against advanced glycation end-products markedly reduced hydroxyl free radicals, malondialdehyde levels, and inhibited cell apoptosis. This result indicated that the antibody for receptor of advanced glycation end-products in neurons from the rat cerebral cortex can reduce glycation end product-induced oxidative stress damage by suppressing glycation end product receptors. Overall, our study confirms that the advanced glycation end products-advanced glycation end products receptor pathway may be the main signaling pathway leading to neuronal damage.
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Affiliation(s)
- Ying Xing
- China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Xu Zhang
- China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Xiangfu Song
- College of Public Health, Jilin University, Changchun 130021, Jilin Province, China
| | - Zhongwen Lv
- China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Lingling Hou
- China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Fei Li
- China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
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Wu L, Wang D, Xiao Y, Zhou X, Wang L, Chen B, Li Q, Guo X, Huang Q. Endoplasmic reticulum stress plays a role in the advanced glycation end product-induced inflammatory response in endothelial cells. Life Sci 2014; 110:44-51. [DOI: 10.1016/j.lfs.2014.06.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 06/07/2014] [Accepted: 06/23/2014] [Indexed: 01/08/2023]
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Chao CC, Chan P, Kuo CS, Gong CL, Cheng TH, Liu ZM, Shen PC, Huang CC, Leung YM. Protection of differentiated neuronal NG108-15 cells from P2X7 receptor-mediated toxicity by taurine. Pharmacol Rep 2014; 66:576-84. [PMID: 24948057 DOI: 10.1016/j.pharep.2014.01.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 01/07/2014] [Accepted: 01/13/2014] [Indexed: 01/23/2023]
Abstract
BACKGROUND Strong P2X7 receptor (P2X7R) activation causes Ca(2+) overload and consequent cell death. We previously showed that depletion of Ca(2+) stores and endoplasmic reticulum (ER) stress in differentiated NG108-15 neuronal cells contributed to P2X7R-mediated cytotoxicity. In this work, we assessed whether taurine (2-aminoethanesulfonic acid) could prevent this P2X7R-mediated cytotoxicity in this neuronal cell line. METHODS Cytotoxicity markers were assessed by MTT assay and Western blotting. Cytosolic Ca(2+) and mitochondrial Ca(2+) concentrations were measured microfluorimetrically using fura-2 and rhod-2, respectively. Intracellular reactive oxygen species (ROS) production was assayed by the indicator 2',7'-dichlorodihydrofluorescein diacetate. RESULTS Selective P2X7R agonist BzATP treatment causes neuronal cell death by causing cytosolic Ca(2+) overload, depletion of Ca(2+) stores, endoplasmic reticulum (ER) stress, and caspase-3 activation (cleaved caspase 3). Remarkably, taurine (10mM) pretreatment could prevent P2X7R-mediated neuronal cell death by blocking BzATP-mediated ER stress as determined by phosphorylated eukaryotic translation initiation factor 2α (peIF2α) and C/EBP-homologous protein (CHOP). However, taurine did not block BzATP-induced Ca(2+) overload and depletion of ER Ca(2+) stores. Interestingly, P2X7R activation did not result in mitochondrial Ca(2+) overload, nor did it affect mitochondrial membrane potential. BzATP-induced generation of intracellular reactive oxygen species (ROS) was prevented by taurine. CONCLUSIONS The neuroprotective effect by taurine is attributed to the suppression of P2X7R-mediated ER stress and ROS formation.
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Affiliation(s)
- Chia-Chia Chao
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Paul Chan
- Division of Cardiology, Department of Medicine, Taipei Medical University Wan Fang Hospital, Taipei, Taiwan
| | - Chang-Shin Kuo
- Graduate Institute of Neural and Cognitive Sciences, China Medical University, Taichung, Taiwan
| | - Chi-Li Gong
- Department of Physiology, China Medical University, Taichung, Taiwan
| | - Tzu-Hurng Cheng
- Department of Biological Sciences and Technology, China Medical University, Taichung, Taiwan
| | - Zhong-Min Liu
- Department of Cardiovascular Surgery, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Pei-Chen Shen
- Department of Cardiology, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Chieh-Chen Huang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan.
| | - Yuk-Man Leung
- Graduate Institute of Neural and Cognitive Sciences, China Medical University, Taichung, Taiwan.
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Role of methylglyoxal in Alzheimer's disease. BIOMED RESEARCH INTERNATIONAL 2014; 2014:238485. [PMID: 24734229 PMCID: PMC3966409 DOI: 10.1155/2014/238485] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 01/28/2014] [Accepted: 01/30/2014] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease is the most common and lethal neurodegenerative disorder. The major hallmarks of Alzheimer's disease are extracellular aggregation of amyloid β peptides and, the presence of intracellular neurofibrillary tangles formed by precipitation/aggregation of hyperphosphorylated tau protein. The etiology of Alzheimer's disease is multifactorial and a full understanding of its pathogenesis remains elusive. Some years ago, it has been suggested that glycation may contribute to both extensive protein cross-linking and oxidative stress in Alzheimer's disease. Glycation is an endogenous process that leads to the production of a class of compounds known as advanced glycation end products (AGEs). Interestingly, increased levels of AGEs have been observed in brains of Alzheimer's disease patients. Methylglyoxal, a reactive intermediate of cellular metabolism, is the most potent precursor of AGEs and is strictly correlated with an increase of oxidative stress in Alzheimer's disease. Many studies are showing that methylglyoxal and methylglyoxal-derived AGEs play a key role in the etiopathogenesis of Alzheimer's disease.
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Zhao J, Ma D, Luo M, Wang W, Zhao C, Zu Y, Fu Y, Wink M. In vitro antioxidant activities and antioxidant enzyme activities in HepG2 cells and main active compounds of endophytic fungus from pigeon pea [Cajanus cajan (L.) Millsp.]. Food Res Int 2014. [DOI: 10.1016/j.foodres.2013.12.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Kulkarni MJ, Korwar AM, Mary S, Bhonsle HS, Giri AP. Glycated proteome: from reaction to intervention. Proteomics Clin Appl 2014. [PMID: 23184864 DOI: 10.1002/prca.201200101] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Glycation, a nonenzymatic reaction between reducing sugars and proteins, is a proteome wide phenomenon, predominantly observed in diabetes due to hyperglycemia. Glycated proteome of plasma, kidney, lens, and brain are implicated in the pathogenesis of various diseases, including diabetic complications, neurodegenerative diseases, cancer, and aging. This review discusses the strategies to characterize protein glycation, its functional implications in different diseases, and intervention strategies to protect the deleterious effects of protein glycation.
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Affiliation(s)
- Mahesh J Kulkarni
- Proteomics Facility, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, India.
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Lupachyk S, Shevalye H, Watcho P, Obrosov A, Obrosova IG, Yorek MA. Treatment of peripheral diabetic neuropathy in Zucker diabetic fatty (ZDF) rats with cariporide. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jdm.2014.41011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Currais A, Maher P. Functional consequences of age-dependent changes in glutathione status in the brain. Antioxid Redox Signal 2013; 19:813-22. [PMID: 23249101 DOI: 10.1089/ars.2012.4996] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
SIGNIFICANCE A decline in both cognitive and motor functions is one of the characteristics of aging. This results in changes in learning and memory, as well as deficits in balance and coordination that significantly impact the quality of life. Importantly, age is the greatest risk factor for a number of neurodegenerative diseases. Alterations in redox homeostasis, protein modification and processing, mitochondrial function, and the immune response have all been implicated in the decline of the aging brain. RECENT ADVANCES Brain glutathione (GSH) decreases with age in humans, and a loss of GSH can impact cognitive function. Decreases in GSH are also associated with microglial activation and endothelial dysfunction, both of which can contribute to impairments in brain function. Changes in redox homeostasis can also potentiate the accumulation of advanced glycation endproducts, resulting in defects in protein processing and function as well as a further increase in inflammation. CRITICAL ISSUES We argue here that many of the changes in brain function associated with age are linked through GSH metabolism. FUTURE DIRECTIONS Further research focused on better understanding how age affects GSH homeostasis with a particular emphasis on the key transcription factors involved in GSH metabolism is needed.
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Affiliation(s)
- Antonio Currais
- Cellular Neurobiology Laboratory, Salk Institute for Biological Studies, La Jolla, California 92037, USA
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Wan W, Chen H, Li Y. The potential mechanisms of Aβ-receptor for advanced glycation end-products interaction disrupting tight junctions of the blood-brain barrier in Alzheimer's disease. Int J Neurosci 2013; 124:75-81. [PMID: 23855502 DOI: 10.3109/00207454.2013.825258] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The receptor for advanced glycation end-products (RAGE) is a multiligand membrane receptor that has been implicated in the cytotoxicity effects of β-amyloid protein (Aβ) in AD. Positive feedback mechanism of RAGE within blood-brain barrier (BBB) and/or cells inside the brain is proposed, including interaction with Aβ stimulating activation of proinflammatory cytokines, release of reactive oxygen species (ROS), which leads to neuron damage and BBB dysfunction. RAGE is the main factor mediating Aβ cytotoxicity. Attenuation of RAGE activity may inhibit Aβ from accumulation in the cerebral blood vessels and prevent neurotoxicity. Furthermore, RAGE may serve as a therapeutic target for Alzheimer's disease by inhibiting pathophysiological consequences of Aβ-RAGE interaction. Tight junctions (TJ) are identified as the basic structure of the BBB and RAGE-mediated Aβ cytotoxicity to the brain microvascular endothelial cells (BMEC), resulting in damaged BBB structural integrity. However, the potential mechanism is poorly studied.
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Affiliation(s)
- Wenbin Wan
- Huadong Hospital, Fudan University , Shanghai , PR China
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Lupachyk S, Watcho P, Shevalye H, Vareniuk I, Obrosov A, Obrosova IG, Yorek MA. Na+/H+ exchanger 1 inhibition reverses manifestation of peripheral diabetic neuropathy in type 1 diabetic rats. Am J Physiol Endocrinol Metab 2013; 305:E396-404. [PMID: 23736542 PMCID: PMC3742852 DOI: 10.1152/ajpendo.00186.2013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Evidence for an important role for Na(+)/H(+) exchangers in diabetic complications is emerging. The aim of this study was to evaluate whether Na(+)/H(+) exchanger 1 inhibition reverses experimental peripheral diabetic neuropathy. Control and streptozotocin-diabetic rats were treated with the specific Na(+)/H(+) exchanger 1 inhibitor cariporide for 4 wk after 12 wk without treatment. Neuropathy end points included sciatic motor and sensory nerve conduction velocities, endoneurial nutritive blood flow, vascular reactivity of epineurial arterioles, thermal nociception, tactile allodynia, and intraepidermal nerve fiber density. Advanced glycation end product and markers of oxidative stress, including nitrated protein levels in sciatic nerve, were evaluated by Western blot. Rats with 12-wk duration of diabetes developed motor and sensory nerve conduction deficits, thermal hypoalgesia, tactile allodynia, and intraepidermal nerve fiber loss. All these changes, including impairment of nerve blood flow and vascular reactivity of epineurial arterioles, were partially reversed by 4 wk of cariporide treatment. Na(+)/H(+) exchanger 1 inhibition was also associated with reduction of diabetes-induced accumulation of advanced glycation endproduct, oxidative stress, and nitrated proteins in sciatic nerve. In conclusion, these findings support an important role for Na(+)/H(+) exchanger 1 in functional, structural, and biochemical manifestations of peripheral diabetic neuropathy and provide the rationale for development of Na(+)/H(+) exchanger 1 inhibitors for treatment of diabetic vascular and neural complications.
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Affiliation(s)
- Sergey Lupachyk
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana, USA
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Tatone C, Amicarelli F. The aging ovary--the poor granulosa cells. Fertil Steril 2013; 99:12-17. [PMID: 23273984 DOI: 10.1016/j.fertnstert.2012.11.029] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 11/17/2012] [Accepted: 11/19/2012] [Indexed: 11/24/2022]
Abstract
The development of a competent oocyte intimately depends on the maintenance of energetic homeostasis in the ovarian and follicular microenvironment. On this basis, it is very likely that the oocyte ages as the ovary ages. Starting from the molecular evidence for energy perturbations in the whole ovary, we review current knowledge on the involvement of endogenous highly reactive metabolites in follicle aging. The first part provides an update of recent findings that confirm the key role of oxidative stress in aged granulosa cells. The second part focuses on studies providing evidence for the implication of advanced glycation end product (AGE) in aging reproductive dysfunction. With their prolonged half-life and ability to act as signaling molecules AGEs may gradually accumulate in the ovary and potentiate the wide spatiotemporal spread of oxidative stress. Clinical evidence for this view supports the hypothesis that AGE is a good candidate as a predictive marker and therapeutic target in new strategies for improving reproductive counseling in aging women.
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Affiliation(s)
- Carla Tatone
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
| | - Fernanda Amicarelli
- Department of Life, Health, and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
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