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Phuong-Nguyen K, McNeill BA, Aston-Mourney K, Rivera LR. Advanced Glycation End-Products and Their Effects on Gut Health. Nutrients 2023; 15:nu15020405. [PMID: 36678276 PMCID: PMC9867518 DOI: 10.3390/nu15020405] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/20/2022] [Accepted: 01/11/2023] [Indexed: 01/14/2023] Open
Abstract
Dietary advanced glycation end-products (AGEs) are a heterogeneous group of compounds formed when reducing sugars are heated with proteins, amino acids, or lipids at high temperatures for a prolonged period. The presence and accumulation of AGEs in numerous cell types and tissues are known to be prevalent in the pathology of many diseases. Modern diets, which contain a high proportion of processed foods and therefore a high level of AGE, cause deleterious effects leading to a multitude of unregulated intracellular and extracellular signalling and inflammatory pathways. Currently, many studies focus on investigating the chemical and structural aspects of AGEs and how they affect the metabolism and the cardiovascular and renal systems. Studies have also shown that AGEs affect the digestive system. However, there is no complete picture of the implication of AGEs in this area. The gastrointestinal tract is not only the first and principal site for the digestion and absorption of dietary AGEs but also one of the most susceptible organs to AGEs, which may exert many local and systemic effects. In this review, we summarise the current evidence of the association between a high-AGE diet and poor health outcomes, with a special focus on the relationship between dietary AGEs and alterations in the gastrointestinal structure, modifications in enteric neurons, and microbiota reshaping.
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Nikoo S, Maghari A, Habibi-Rezaei M, Moosavi-Movahedi AA. Mechanistic study of lysozyme glycation by fructose and modulation by curcumin derivatives. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Azizian-Farsani F, Osuchowski M, Abedpoor N, Forootan FS, Derakhshan M, Nasr-Esfahani MH, Sheikhha MH, Ghaedi K. Anti-inflammatory and -apoptotic effects of a long-term herbal extract treatment on DSS-induced colitis in mice fed with high AGEs-fat diet. Nutr Metab (Lond) 2021; 18:77. [PMID: 34380504 PMCID: PMC8359107 DOI: 10.1186/s12986-021-00603-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/23/2021] [Indexed: 01/11/2023] Open
Abstract
Background Obesity is associated with many comorbidities including inflammatory bowel disease (IBD). We investigated prophylactic effects of an herbal extract (HE) on the DSS-induced colitis mice challenged with high AGEs-fat diet 60% (HFD). Methods Six-week-old C57BL/6 male mice were fed with either HFD (8 groups, 6 mice in each group), or normal diet (ND) (8 groups, 6 mice in each group). After 6 weeks, animals received HE (combination of turmeric, ginger, boswellia and cat’s claw extract) for 7 weeks in three doses (high dose (0.6 mg/g); low dose (0.15 mg/g) and mid dose (0.3 mg/g)). Next, mice were subjected to 2.5% DSS in drinking water. Control mice received ND and instead of HE and DSS they received distilled water. Obesity index markers were determined, H&E staining and TUNEL assay evaluated apoptosis. Colonic expressions of IL-6, RAGE, AGER1, Sirt1, Bax, Bcl2, ZO-1 and P53 were determined.
Results HE ameliorated colitis in HFD mice by reducing colonic myeloperoxidase activity (by 2.3-fold), macrophage accumulation (by 2.6-fold) and mRNA expression of IL-6 (by 2.3-fold) in HFD mice. Moreover, HE restored ZO-1 (by 2.7-fold), prevented apoptosis and maintained immune homeostasis. HE reduced activation of NF-κB protein (by 1.3-fold) through decreasing RAGE (by 1.93-fold) and up-regulation of Sirt1 (by 7.71-fold) and prevented down-regulation of DDOST (by 6.6-fold) in HFD mice. Conclusions HE ameliorated colitis in prophylactic in HFD mice and it was, at least partly, due to the restoration of the gut integrity, suppression of inflammation and apoptosis via modulation of colonic Sirt1, RAGE and DDOST signaling. Graphic abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12986-021-00603-x.
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Affiliation(s)
| | - Marcin Osuchowski
- Ludwig Boltzmann Institute for Clinical and Experimental Traumatology in AUVA Research Center, Vienna, Austria.
| | - Navid Abedpoor
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Royan, Salman Streets, 816513-1378, Isfahan, Iran
| | - Farzad Seyed Forootan
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Royan, Salman Streets, 816513-1378, Isfahan, Iran.,Legal Medicine research Center, Legal Medicine Organization, Tehran, Iran
| | - Maryam Derakhshan
- Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Hossein Nasr-Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Royan, Salman Streets, 816513-1378, Isfahan, Iran.
| | - Mohammad Hasan Sheikhha
- Department of Medical Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. .,Biotechnology Research Center, International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Kamran Ghaedi
- Department of Cell and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezar Jerib Ave., Azadi Sq., 81746-73441, Isfahan, Iran.
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Role of curd and yogurt in establishment and progression of diabetes through protein glycation and induction of inflammation. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2020.100829] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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van der Lugt T, Opperhuizen A, Bast A, Vrolijk MF. Dietary Advanced Glycation Endproducts and the Gastrointestinal Tract. Nutrients 2020; 12:nu12092814. [PMID: 32937858 PMCID: PMC7551018 DOI: 10.3390/nu12092814] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/19/2022] Open
Abstract
The prevalence of inflammatory bowel diseases (IBD) is increasing in the world. The introduction of the Western diet has been suggested as a potential explanation of increased prevalence. The Western diet includes highly processed food products, and often include thermal treatment. During thermal treatment, the Maillard reaction can occur, leading to the formation of dietary advanced glycation endproducts (dAGEs). In this review, different biological effects of dAGEs are discussed, including their digestion, absorption, formation, and degradation in the gastrointestinal tract, with an emphasis on their pro-inflammatory effects. In addition, potential mechanisms in the inflammatory effects of dAGEs are discussed. This review also specifically elaborates on the involvement of the effects of dAGEs in IBD and focuses on evidence regarding the involvement of dAGEs in the symptoms of IBD. Finally, knowledge gaps that still need to be filled are identified.
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Affiliation(s)
- Timme van der Lugt
- Department of Pharmacology and Toxicology, Maastricht University, 6229 ER Maastricht, The Netherlands;
- Office for Risk Assessment and Research, Netherlands Food and Consumer Product Safety Authority (NVWA), 3540 AA Utrecht, The Netherlands
- Correspondence:
| | - Antoon Opperhuizen
- Department of Pharmacology and Toxicology, Maastricht University, 6229 ER Maastricht, The Netherlands;
- Office for Risk Assessment and Research, Netherlands Food and Consumer Product Safety Authority (NVWA), 3540 AA Utrecht, The Netherlands
| | - Aalt Bast
- Department of Pharmacology and Toxicology, Maastricht University, 6229 ER Maastricht, The Netherlands;
- Campus Venlo, Maastricht University, 5911 BV Venlo, The Netherlands; (A.B.); (M.F.V.)
| | - Misha F. Vrolijk
- Campus Venlo, Maastricht University, 5911 BV Venlo, The Netherlands; (A.B.); (M.F.V.)
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6
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Human fluorescent profile of urine as a simple tool of mining in data from autofluorescence spectroscopy. Biomed Signal Process Control 2020. [DOI: 10.1016/j.bspc.2019.101693] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Qu W, Nie C, Zhao J, Ou X, Zhang Y, Yang S, Bai X, Wang Y, Wang J, Li J. Microbiome-Metabolomics Analysis of the Impacts of Long-Term Dietary Advanced-Glycation-End-Product Consumption on C57BL/6 Mouse Fecal Microbiota and Metabolites. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8864-8875. [PMID: 30037223 DOI: 10.1021/acs.jafc.8b01466] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Thermally processed diets are widely consumed, although advanced-glycation end products (AGEs) are unavoidably formed. AGEs, clusters of protein-cross-linking products, become less digestible because they impair intestinal peptidase proteolysis. We characterized the impacts of dietary AGEs on gut microbiota through a microbiome-to-metabolome association study. C57BL/6 mice were fed a heat-treated diet (high-AGE diet, H-AGE) or a standard AIN-93G diet (low-AGE diet, L-AGE) for 8 months. Fecal-microbiota composition was examined by 16S rDNA sequencing, and fecal-metabolome profile was evaluated by gas chromatography-tandem time-of-flight mass spectrometry (GC-TOF-MS). Reduced α-diversity and altered microbiota composition with elevated Helicobacter levels were found in the H-AGE group, and among the 57 perturbed metabolites, protein-fermentation products (i.e., p-cresol and putrescine) were increased. Major dysfunctional metabolic pathways were associated with carbohydrate and amino acid metabolism in two groups. Moreover, high correlations were found between fluctuant gut microbiota and metabolites. These findings might reveal the underlying mechanisms of the detrimental impacts of dietary AGEs on host health.
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Affiliation(s)
- Wanting Qu
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Chenxi Nie
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Jinsong Zhao
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Xiyang Ou
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Yingxiao Zhang
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Shanchun Yang
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Xue Bai
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
| | - Yong Wang
- Shaanxi Research Institute of Agricultural Products Processing Technology , Xi'an , Shaanxi Province 710016, PR China
- Shaanxi University of Science and Technology , Xi'an , Shaanxi Province 710016 , PR China
| | - Jiawei Wang
- Shaanxi University of Science and Technology , Xi'an , Shaanxi Province 710016 , PR China
| | - Juxiu Li
- College of Food Science and Engineering , Northwest A&F University , 22 Xinong Road , Yangling , Shaanxi Province 712100 , PR China
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Yuan X, Zhao J, Qu W, Zhang Y, Jia B, Fan Z, He Q, Li J. Accumulation and effects of dietary advanced glycation end products on the gastrointestinal tract in rats. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13817] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaojin Yuan
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Jinsong Zhao
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Wanting Qu
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Yingxiao Zhang
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Benpan Jia
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Zhiyi Fan
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Qihan He
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
| | - Juxiu Li
- College of Food Science and Engineering; Northwest A&F University; Yangling 712100 China
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9
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Kellow NJ, Coughlan MT. Effect of diet-derived advanced glycation end products on inflammation. Nutr Rev 2015; 73:737-59. [PMID: 26377870 DOI: 10.1093/nutrit/nuv030] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Advanced glycation end products (AGEs) formed via the Maillard reaction during the thermal processing of food contributes to the flavor, color, and aroma of food. A proportion of food-derived AGEs and their precursors is intestinally absorbed and accumulates within cells and tissues. AGEs have been implicated in the pathogenesis of diabetes-related complications and several chronic diseases via interaction with the receptor for AGEs, which promotes the transcription of genes that control inflammation. The dicarbonyls, highly reactive intermediates of AGE formation, are also generated during food processing and may incite inflammatory responses through 1) the suppression of protective pathways, 2) the incretin axis, 3) the modulation of immune-mediated signaling, and 4) changes in gut microbiota profile and metabolite sensors. In animal models, restriction of dietary AGEs attenuates chronic low-grade inflammation, but current evidence from human studies is less clear. Here, the emerging relationship between excess dietary AGE consumption and inflammation is explored, the utility of dietary AGE restriction as a therapeutic strategy for the attenuation of chronic diseases is discussed, and possible avenues for future investigation are suggested.
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Affiliation(s)
- Nicole J Kellow
- N.J. Kellow and M.T. Coughlan are with the Glycation, Nutrition and Metabolism Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia, and the Department of Epidemiology & Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia. M.T. Coughlan is with the Department of Medicine, Central Clinical School, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia
| | - Melinda T Coughlan
- N.J. Kellow and M.T. Coughlan are with the Glycation, Nutrition and Metabolism Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia, and the Department of Epidemiology & Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia. M.T. Coughlan is with the Department of Medicine, Central Clinical School, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia.
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Ali MM, Newsom DL, González JF, Sabag-Daigle A, Stahl C, Steidley B, Dubena J, Dyszel JL, Smith JN, Dieye Y, Arsenescu R, Boyaka PN, Krakowka S, Romeo T, Behrman EJ, White P, Ahmer BMM. Fructose-asparagine is a primary nutrient during growth of Salmonella in the inflamed intestine. PLoS Pathog 2014; 10:e1004209. [PMID: 24967579 PMCID: PMC4072780 DOI: 10.1371/journal.ppat.1004209] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 05/09/2014] [Indexed: 12/21/2022] Open
Abstract
Salmonella enterica serovar Typhimurium (Salmonella) is one of the most significant food-borne pathogens affecting both humans and agriculture. We have determined that Salmonella encodes an uptake and utilization pathway specific for a novel nutrient, fructose-asparagine (F-Asn), which is essential for Salmonella fitness in the inflamed intestine (modeled using germ-free, streptomycin-treated, ex-germ-free with human microbiota, and IL10-/- mice). The locus encoding F-Asn utilization, fra, provides an advantage only if Salmonella can initiate inflammation and use tetrathionate as a terminal electron acceptor for anaerobic respiration (the fra phenotype is lost in Salmonella SPI1- SPI2- or ttrA mutants, respectively). The severe fitness defect of a Salmonella fra mutant suggests that F-Asn is the primary nutrient utilized by Salmonella in the inflamed intestine and that this system provides a valuable target for novel therapies.
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Affiliation(s)
- Mohamed M. Ali
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - David L. Newsom
- Center for Microbial Pathogenesis, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States of America
| | - Juan F. González
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
| | - Anice Sabag-Daigle
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
| | - Christopher Stahl
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
| | - Brandi Steidley
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
| | - Judith Dubena
- Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Jessica L. Dyszel
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
| | - Jenee N. Smith
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
| | - Yakhya Dieye
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
| | - Razvan Arsenescu
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Prosper N. Boyaka
- Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Steven Krakowka
- Department of Veterinary Biosciences, The Ohio State University, Columbus, Ohio, United States of America
| | - Tony Romeo
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, United States of America
| | - Edward J. Behrman
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, United States of America
| | - Peter White
- Center for Microbial Pathogenesis, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States of America
| | - Brian M. M. Ahmer
- Department of Microbiology, The Ohio State University, Columbus, Ohio, United States of America
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail:
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11
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Bengmark S. Gut microbiota, immune development and function. Pharmacol Res 2012; 69:87-113. [PMID: 22989504 DOI: 10.1016/j.phrs.2012.09.002] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 09/01/2012] [Indexed: 02/08/2023]
Abstract
The microbiota of Westerners is significantly reduced in comparison to rural individuals living a similar lifestyle to our Paleolithic forefathers but also to that of other free-living primates such as the chimpanzee. The great majority of ingredients in the industrially produced foods consumed in the West are absorbed in the upper part of small intestine and thus of limited benefit to the microbiota. Lack of proper nutrition for microbiota is a major factor under-pinning dysfunctional microbiota, dysbiosis, chronically elevated inflammation, and the production and leakage of endotoxins through the various tissue barriers. Furthermore, the over-comsumption of insulinogenic foods and proteotoxins, such as advanced glycation and lipoxidation molecules, gluten and zein, and a reduced intake of fruit and vegetables, are key factors behind the commonly observed elevated inflammation and the endemic of obesity and chronic diseases, factors which are also likely to be detrimental to microbiota. As a consequence of this lifestyle and the associated eating habits, most barriers, including the gut, the airways, the skin, the oral cavity, the vagina, the placenta, the blood-brain barrier, etc., are increasingly permeable. Attempts to recondition these barriers through the use of so called 'probiotics', normally applied to the gut, are rarely successful, and sometimes fail, as they are usually applied as adjunctive treatments, e.g. in parallel with heavy pharmaceutical treatment, not rarely consisting in antibiotics and chemotherapy. It is increasingly observed that the majority of pharmaceutical drugs, even those believed to have minimal adverse effects, such as proton pump inhibitors and anti-hypertensives, in fact adversely affect immune development and functions and are most likely also deleterious to microbiota. Equally, it appears that probiotic treatment is not compatible with pharmacological treatments. Eco-biological treatments, with plant-derived substances, or phytochemicals, e.g. curcumin and resveratrol, and pre-, pro- and syn-biotics offers similar effects as use of biologicals, although milder but also free from adverse effects. Such treatments should be tried as alternative therapies; mainly, to begin with, for disease prevention but also in early cases of chronic diseases. Pharmaceutical treatment has, thus far, failed to inhibit the tsunami of endemic diseases spreading around the world, and no new tools are in sight. Dramatic alterations, in direction of a paleolithic-like lifestyle and food habits, seem to be the only alternatives with the potential to control the present escalating crisis. The present review focuses on human studies, especially those of clinical relevance.
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Affiliation(s)
- Stig Bengmark
- Division of Surgery & Interventional Science, University College London, 4th floor, 74 Huntley Street, London WC1E 6AU, United Kingdom.
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12
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Pentosidina: un nuevo biomarcador de las complicaciones en la diabetes mellitus. Med Clin (Barc) 2011; 136:298-302. [DOI: 10.1016/j.medcli.2009.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 11/26/2009] [Accepted: 12/01/2009] [Indexed: 12/31/2022]
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Advanced glycation endproducts: from precursors to RAGE: round and round we go. Amino Acids 2010; 42:1151-61. [PMID: 20957395 DOI: 10.1007/s00726-010-0773-2] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2010] [Accepted: 09/01/2010] [Indexed: 12/14/2022]
Abstract
The formation of advanced glycation endproducts (AGEs) occurs in diverse settings such as diabetes, aging, renal failure, inflammation and hypoxia. The chief cellular receptor for AGEs, RAGE, transduces the effects of AGEs via signal transduction, at least in part via processes requiring the RAGE cytoplasmic domain binding partner, diaphanous-1 or mDia1. Data suggest that RAGE perpetuates the inflammatory signals initiated by AGEs via multiple mechanisms. AGE-RAGE interaction stimulates generation of reactive oxygen species and inflammation--mechanisms which enhance AGE formation. Further, recent data in type 1 diabetic kidney reveal that deletion of RAGE prevents methylglyoxal accumulation, at least in part via RAGE-dependent regulation of glyoxalase-1, a major enzyme involved in methylglyoxal detoxification. Taken together, these considerations place RAGE in the center of biochemical and molecular stresses that characterize the complications of diabetes and chronic disease. Stopping RAGE-dependent signaling may hold the key to interrupting cycles of cellular perturbation and tissue damage in these disorders.
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Choi YG, Lim S. N(ɛ)-(carboxymethyl)lysine linkage to α-synuclein and involvement of advanced glycation end products in α-synuclein deposits in an MPTP-intoxicated mouse model. Biochimie 2010; 92:1379-86. [PMID: 20624443 DOI: 10.1016/j.biochi.2010.06.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Accepted: 06/30/2010] [Indexed: 12/21/2022]
Abstract
This study investigated the involvement of advanced glycation end products (AGEs) that may be nonenzymatically linked to α-synuclein accumulation in the chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced C57BL/6 mouse model of parkinsonism. MPTP (20 mg/kg) was intraperitoneally administrated once daily for 30 days to the MPTP group while a saline only solution was administered to the control group. Results show that the immunoreactivities of the tyrosine hydroxylase and dopamine transporter significantly decreased in the striatum and the substantia nigra (SN) in the MPTP model compared to the subjects in the control group. α-synuclein was co-localized with N(ɛ)-(carboxymethyl)lysine (CML) and N(ɛ)-(carboxyethyl)lysine (CEL), which are well-known AGEs, in tyrosine hydroxylase-positive dopaminergic neurons in the MPTP brains. α-synuclein was also shown to be deposited in the CD11b-positive activated microglia. Some AGEs-modified proteins (CML-, CEL-, pentosidine-, or pyrraline-modified proteins) and an oligomeric form of α-synuclein appear to have almost the same molecular weight, specifically between 50 and 75 kDa; in addition, these formations were more strongly deposited in the SN region of the MPTP brains than in the control brains. Moreover, the oligomeric form of α-synuclein was modified with CML in the SNs of both the control and MPTP brains. This study, for the first time, shows that chronic dopaminergic neurodegeneration by MPTP can lead to the depositing of an oligomeric form of α-synuclein, CML-linked α-synuclein, and CEL-, pentosidine-, or pyrraline-linked proteins between 50 and 75 kDa. It is thus suggested that CML, especially a CML-linked α-synuclein oligomer between 50 and 75 kDa, may be, at least in part, involved in the aggregation of the α-synuclein induced by MPTP intoxication.
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Affiliation(s)
- Yeong-Gon Choi
- Research Team of Pain and Neuroscience, WHO Collaborating Center for Traditional Medicine, East-West Medical Research Institute, Kyung Hee University, #1 Hoegi-dong Dongdaemoon-gu, Seoul 130-701, Republic of Korea
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Sjöberg JS, Bulterijs S. Characteristics, Formation, and Pathophysiology of Glucosepane: A Major Protein Cross-Link. Rejuvenation Res 2009; 12:137-48. [DOI: 10.1089/rej.2009.0846] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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