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Christoudia N, Bekas N, Kanata E, Chatziefsthathiou A, Pettas S, Karagianni K, Da Silva Correia SM, Schmitz M, Zerr I, Tsamesidis I, Xanthopoulos K, Dafou D, Sklaviadis T. Αnti-prion effects of anthocyanins. Redox Biol 2024; 72:103133. [PMID: 38565068 PMCID: PMC10990977 DOI: 10.1016/j.redox.2024.103133] [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: 02/26/2024] [Revised: 03/22/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024] Open
Abstract
Prion diseases, also known as Transmissible Spongiform Encephalopathies (TSEs), are protein-based neurodegenerative disorders (NDs) affecting humans and animals. They are characterized by the conformational conversion of the normal cellular prion protein, PrPC, into the pathogenic isoform, PrPSc. Prion diseases are invariably fatal and despite ongoing research, no effective prophylactic or therapeutic avenues are currently available. Anthocyanins (ACNs) are unique flavonoid compounds and interest in their use as potential neuroprotective and/or therapeutic agents against NDs, has increased significantly in recent years. Therefore, we investigated the potential anti-oxidant and anti-prion effects of Oenin and Myrtillin, two of the most common anthocyanins, using the most accepted in the field overexpressing PrPScin vitro model and a cell free protein aggregation model. Our results, indicate both anthocyanins as strong anti-oxidant compounds, upregulating the expression of genes involved in the anti-oxidant response, and reducing the levels of Reactive Oxygen Species (ROS), produced due to pathogenic prion infection, through the activation of the Keap1-Nrf2 pathway. Importantly, they showcased remarkable anti-prion potential, as they not only caused the clearance of pathogenic PrPSc aggregates, but also completely inhibited the formation of PrPSc fibrils in the Cerebrospinal Fluid (CSF) of patients with Creutzfeldt-Jakob disease (CJD). Therefore, Oenin and Myrtillin possess pleiotropic effects, suggesting their potential use as promising preventive and/or therapeutic agents in prion diseases and possibly in the spectrum of neurodegenerative proteinopathies.
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Affiliation(s)
- Nikoletta Christoudia
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Nikolaos Bekas
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Eirini Kanata
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Athanasia Chatziefsthathiou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Spyros Pettas
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece; Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Korina Karagianni
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Susana Margarida Da Silva Correia
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany
| | - Matthias Schmitz
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany.
| | - Inga Zerr
- Department of Neurology, German Center for Neurodegenerative Diseases (DZNE), University Medicine Goettingen, 37075, Goettingen, Germany.
| | - Ioannis Tsamesidis
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Konstantinos Xanthopoulos
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Dimitra Dafou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
| | - Theodoros Sklaviadis
- Neurodegenerative Diseases Research Group, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece.
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Kozłowska A, Nitsch-Osuch A. Anthocyanins and Type 2 Diabetes: An Update of Human Study and Clinical Trial. Nutrients 2024; 16:1674. [PMID: 38892607 PMCID: PMC11174612 DOI: 10.3390/nu16111674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/21/2024] Open
Abstract
Anthocyanins are phenolic compounds occurring in fruits and vegetables. Evidence from pre-clinical studies indicates their role in glucose level regulation, gut microbiota improvement, and inflammation reduction under diabetic conditions. Therefore, incorporating these research advancements into clinical practice would significantly improve the prevention and management of type 2 diabetes. This narrative review provides a concise overview of 18 findings from recent clinical research published over the last 5 years that investigate the therapeutic effects of dietary anthocyanins on diabetes. Anthocyanin supplementation has been shown to have a regulatory effect on fasting blood glucose levels, glycated hemoglobin, and other diabetes-related indicators. Furthermore, increased anthocyanin dosages had more favorable implications for diabetes treatment. This review provides evidence that an anthocyanin-rich diet can improve diabetes outcomes, especially in at-risk groups. Future research should focus on optimal intervention duration, consider multiple clinical biomarkers, and analyze anthocyanin effects among well-controlled versus poorly controlled groups of patients with diabetes.
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Affiliation(s)
- Aleksandra Kozłowska
- Department of Social Medicine and Public Health, Medical University of Warsaw, 02-106 Warsaw, Poland;
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König S, Bakuradze T, Jesser S, Sreeja HA, Carlsson MJ, Fahrer J, Kins S, Richling E. Influence of Bilberry Extract on Neuronal Cell Toxicity. BIOLOGY 2024; 13:376. [PMID: 38927256 PMCID: PMC11200780 DOI: 10.3390/biology13060376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024]
Abstract
Increased intake of dietary antioxidants such as anthocyanins, which are enriched in colourful fruits, is a promising alternative to reduce the risk of degenerative diseases such as Alzheimer's Disease (AD). Since Amyloid β (Aβ) is one of the key components contributing to AD pathology, probably by reactive oxygen species (ROS) induction, this study investigated the preventive effect of anthocyanin-rich bilberry extract (BE) and its anthocyanin fraction (ACN) on ROS generation and cell toxicity. The results showed a significant and concentration-dependent decrease in neuroblastoma cell (SH-SY5Y) viability by BE or ACN, whereas no cell toxicity was observed in HeLa cells. Incubation with BE and ACN for 24 h diminished the generation of induced ROS levels in SH-SY5Y and HeLa cells. In addition, low concentrations of BE (1-5 µg/mL) showed protective effects against Aβ-induced cytotoxicity in SH-SY5Y cells. In conclusion, our results suggest antioxidant and protective effects of BE and ACN, which could potentially be used to delay the course of neurodegenerative diseases such as AD. Further studies are needed to clarify the high potential of anthocyanins and their in vivo metabolites on neuronal function.
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Affiliation(s)
- Svenja König
- Division of Human Biology and Neurobiology, Department of Biology, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany; (S.K.); (H.A.S.); (S.K.)
| | - Tamara Bakuradze
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany (S.J.); (M.J.C.); (J.F.)
| | - Sandy Jesser
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany (S.J.); (M.J.C.); (J.F.)
| | - Harshitha Ashoka Sreeja
- Division of Human Biology and Neurobiology, Department of Biology, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany; (S.K.); (H.A.S.); (S.K.)
| | - Max J. Carlsson
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany (S.J.); (M.J.C.); (J.F.)
| | - Jörg Fahrer
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany (S.J.); (M.J.C.); (J.F.)
| | - Stefan Kins
- Division of Human Biology and Neurobiology, Department of Biology, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 13, D-67663 Kaiserslautern, Germany; (S.K.); (H.A.S.); (S.K.)
| | - Elke Richling
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern—Landau, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany (S.J.); (M.J.C.); (J.F.)
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Rosales-Murillo S, Sánchez-Bodón J, Hernández Olmos S, Ibarra-Vázquez M, Guerrero-Ramírez L, Pérez-Álvarez L, Vilas-Vilela J. Anthocyanin-Loaded Polymers as Promising Nature-Based, Responsive, and Bioactive Materials. Polymers (Basel) 2024; 16:163. [PMID: 38201828 PMCID: PMC10781030 DOI: 10.3390/polym16010163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/19/2023] [Accepted: 12/30/2023] [Indexed: 01/12/2024] Open
Abstract
Anthocyanins are a specific group of molecules found in nature that have recently received increasing attention due to their interesting biological and colorimetric properties that have been successfully applied in several fields such as food preservation and biomedicine. Consequently, reviews devoted to a general overview of these flavonoids have proliferated in recent years. Meanwhile, the incorporation of anthocyanins into polymeric systems has become an interesting strategy to widen the applicability of these molecules and develop new smart and functional polymers in the above cited areas. However, anthocyanin-based polymers have been scarcely reviewed in the literature. Accordingly, this review aims to be a systematic summary of the most recent approaches for the incorporation of anthocyanins into macro-, micro-, or nanostructured polymers. Moreover, this work describes the fundamentals of the applicability of smart anthocyanin-based polymers and offers an updated review of their most interesting applications as sensors, biological regulators, and active materials.
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Affiliation(s)
- S.S. Rosales-Murillo
- Chemistry Department, University Center of Exact Sciences and Engineering, University of Guadalajara, Guadalajara 44430, Mexico; (S.S.R.-M.); (S.L.H.O.); (M.F.I.-V.); (L.G.G.-R.)
| | - Julia Sánchez-Bodón
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, Spain; (J.S.-B.); (J.L.V.-V.)
| | - S.L. Hernández Olmos
- Chemistry Department, University Center of Exact Sciences and Engineering, University of Guadalajara, Guadalajara 44430, Mexico; (S.S.R.-M.); (S.L.H.O.); (M.F.I.-V.); (L.G.G.-R.)
| | - M.F. Ibarra-Vázquez
- Chemistry Department, University Center of Exact Sciences and Engineering, University of Guadalajara, Guadalajara 44430, Mexico; (S.S.R.-M.); (S.L.H.O.); (M.F.I.-V.); (L.G.G.-R.)
- Technological University of Jalisco, Guadalajara 44970, Mexico
| | - L.G. Guerrero-Ramírez
- Chemistry Department, University Center of Exact Sciences and Engineering, University of Guadalajara, Guadalajara 44430, Mexico; (S.S.R.-M.); (S.L.H.O.); (M.F.I.-V.); (L.G.G.-R.)
| | - L. Pérez-Álvarez
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, Spain; (J.S.-B.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - J.L. Vilas-Vilela
- Macromolecular Chemistry Group (LQM), Physical Chemistry Department, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, Spain; (J.S.-B.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
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