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Zhao X, Zhang X, Tie S, Hou S, Wang H, Song Y, Rai R, Tan M. Facile synthesis of nano-nanocarriers from chitosan and pectin with improved stability and biocompatibility for anthocyanins delivery: An in vitro and in vivo study. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.106114] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Schlotterer A, Masri B, Humpert M, Krämer BK, Hammes HP, Morcos M. Sulforaphane and Vitamin E Protect From Glucotoxic Neurodegeneration and Lifespan Reduction In C. Elegans. Exp Clin Endocrinol Diabetes 2020; 129:887-894. [PMID: 32503075 DOI: 10.1055/a-1158-9248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
Abstract
Caenorhabditis elegans is an established model organism in neurodegeneration and aging research. Oxidative stress and formation of advanced glycation endproducts (AGEs), as they occur under hyperglycemic conditions in diabetes mellitus, contribute to neuronal damage and lifespan reduction. Sulforaphane (SFN) is an indirect antioxidant, alpha-tocopherol (vitamin E) is a direct antioxidant that acts as a free radical scavenger. Aim of this study is to investigate the protective effects of SFN and vitamin E against glucotoxic damages to the neuronal system and lifespan in C. elegans. Culture conditions that mimic clinical hyperglycemia increased the formation of reactive oxygen species (ROS) (p<0.001) and the accumulation of methylglyoxal-derived advanced glycation endproducts (MG-derived AGEs) (p<0.01) with subsequent neuronal damage and neuronal dysfunction, ultimately leading to a significant shortening of lifespan (p<0.01). Treatment with both, 20 µmol/l SFN and 200 µg/ml vitamin E, completely prevented the increase in ROS and MG-derived AGEs, abolished the glucotoxic effects on neuronal structure and function, and preserved lifespan, resulting in a life expectancy similar to untreated controls. These data emphasize the relevance of indirect and direct antioxidants as potential therapeutic options for the prevention of glucotoxic pathologies.
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Affiliation(s)
- Andrea Schlotterer
- Fifth Department of Medicine, Heidelberg University, Medical Faculty Mannheim, Mannheim, Germany
| | - Benan Masri
- Department of Medicine I, Endocrinology and Clinical Chemistry, University Hospital Heidelberg, Heidelberg, Germany
| | | | - Bernhard Karl Krämer
- Fifth Department of Medicine, Heidelberg University, Medical Faculty Mannheim, Mannheim, Germany
| | - Hans-Peter Hammes
- Fifth Department of Medicine, Heidelberg University, Medical Faculty Mannheim, Mannheim, Germany
| | - Michael Morcos
- Fifth Department of Medicine, Heidelberg University, Medical Faculty Mannheim, Mannheim, Germany.,European Center for Angioscience (ECAS), Heidelberg University, Medical Faculty Mannheim, Mannheim, Germany
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Schlotterer A, Pfisterer F, Kukudov G, Heckmann B, Henriquez D, Morath C, Krämer BK, Hammes HP, Schwenger V, Morcos M. Neuronal damage and shortening of lifespan in C. elegans by peritoneal dialysis fluid: Protection by glyoxalase-1. Biomed Rep 2018; 8:540-546. [PMID: 29805788 DOI: 10.3892/br.2018.1085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 03/12/2018] [Indexed: 01/13/2023] Open
Abstract
Glucose and glucose degradation products (GDPs), contained in peritoneal dialysis (PD) fluids, contribute to the formation of advanced glycation end-products (AGEs). Local damaging effects, resulting in functional impairment of the peritoneal membrane, are well studied. It is also supposed that detoxification of AGE precursors by glyoxalase-1 (GLO1) has beneficial effects on GDP-mediated toxicity. The aim of the current study was to analyze systemic detrimental effects of PD fluids and their prevention by glyoxlase-1. Wild-type and GLO1-overexpressing Caenorhabditis elegans (C. elegans) were cultivated in the presence of low- and high-GDP PD fluids containing 1.5 or 4% glucose. Lifespan, neuronal integrity and neuronal functions were subsequently studied. The higher concentrations of glucose and GDP content resulted in a decrease of maximum lifespan by 2 (P<0.01) and 9 days (P<0.001), respectively. Exposure to low- and high-GDP fluids caused reduction of neuronal integrity by 34 (P<0.05) and 41% (P<0.05). Cultivation of animals in the presence of low-GDP fluid containing 4% glucose caused significant impairment of neuronal function, reducing relative and absolute head motility by 58.5 (P<0.01) and 56.7% (P<0.01), respectively; and relative and absolute tail motility by 55.1 (P<0.05) and 55.0% (P<0.05), respectively. Taken together, GLO1 overexpression protected from glucose-induced lifespan reduction, neurostructural damage and neurofunctional damage under low-GDP-conditions. In conclusion, both glucose and GDP content in PD fluids have systemic impact on the lifespan and neuronal integrity of C. elegans. Detoxification of reactive metabolites by GLO1 overexpression was sufficient to protect lifespan, neuronal integrity and neuronal function in a low-GDP environment. These data emphasize the relevance of the GLO1 detoxifying pathway as a potential therapeutic target in the treatment of reactive metabolite-mediated pathologies.
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Affiliation(s)
- Andrea Schlotterer
- Fifth Medical Department, Medical Faculty Mannheim, Heidelberg University, D-68167 Mannheim, Germany
| | - Friederike Pfisterer
- Department of Medicine I and Clinical Chemistry, Heidelberg University, D-69120 Heidelberg, Germany
| | - Georgi Kukudov
- Fifth Medical Department, Medical Faculty Mannheim, Heidelberg University, D-68167 Mannheim, Germany
| | - Britta Heckmann
- Department of Dermatology, Heidelberg University, D-69120 Heidelberg, Germany
| | - Daniel Henriquez
- Department of Nephrology, Centre Hospitalier du Nord, 9080 Ettelbruck, Luxembourg, Germany
| | - Christian Morath
- Department of Nephrology, Heidelberg University, D-69120 Heidelberg, Germany
| | - Bernhard K Krämer
- Fifth Medical Department, Medical Faculty Mannheim, Heidelberg University, D-68167 Mannheim, Germany
| | - Hans-Peter Hammes
- Fifth Medical Department, Medical Faculty Mannheim, Heidelberg University, D-68167 Mannheim, Germany
| | - Vedat Schwenger
- Klinik für Nieren-, Hochdruck- und Autoimmunerkrankungen, Klinikum Stuttgart, D-70174 Stuttgart, Germany
| | - Michael Morcos
- Fifth Medical Department, Medical Faculty Mannheim, Heidelberg University, D-68167 Mannheim, Germany
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