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Wang J, Huang Y, Bei C, Yang H, Lin Z, Xu L. Causal associations of antioxidants with Alzheimer's disease and cognitive function: a Mendelian randomisation study. J Epidemiol Community Health 2024; 78:424-430. [PMID: 38589220 DOI: 10.1136/jech-2023-221184] [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: 07/22/2023] [Accepted: 03/09/2024] [Indexed: 04/10/2024]
Abstract
BACKGROUND Circulating antioxidants are associated with a lower risk of Alzheimer's disease (AD) in observational studies, suggesting potential target areas for intervention. However, whether the associations are causal remains unclear. Here, we studied the causality between antioxidants and AD or cognitive function using two-sample Mendelian randomisation (MR). METHODS Single nucleotide polymorphisms strongly (p<5×10-8) associated with antioxidants (vitamin A, vitamin C, zinc, selenium, β-carotene and urate) and outcomes (AD, cognitive performance and reaction time) were obtained from the largest and most recent genome-wide association studies (GWAS). MR inverse variance weighting (IVW) and MR pleiotropy residual sum and outlier test (MR-PRESSO) were used for data analysis. RESULTS Higher genetically determined selenium level was associated with 5% higher risk of AD (OR 1.047, 95% CI 1.005 to 1.091, p=0.028) using IVW. Higher genetically determined urate level was associated with worse cognitive performance (β=-0.026, 95% CI -0.044 to -0.008, p=0.005) using MR-PRESSO. No association between the other antioxidants and AD, cognitive performance and reaction time was found. Similar results were found in the sensitivity analyses. CONCLUSION Our results suggest that lifelong exposure to higher selenium may be associated with a higher risk of AD, and higher urate levels could be associated with worse cognitive performance. Further analyses using larger GWAS of antioxidants are warranted to confirm these observations. Our results suggest that caution is needed in the interpretation of traditional observational evidence on the neuroprotective effects of antioxidants.
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Affiliation(s)
- Jiao Wang
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yingyue Huang
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Chunhua Bei
- School of Public Health, Guilin Medical University, Guilin, Guangxi, China
| | - Huiling Yang
- Eastern-fusion Master Studio of Hezhou, Hezhou, China
| | - Zihong Lin
- Hezhou Research Institute of Longevity Health Science, Hezhou, China
| | - Lin Xu
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
- School of Public Health, The University of Hong Kong Li Ka Shing Faculty of Medicine, Hong Kong, China
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2
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Wieczorek E, Vauzour D, Pontifex MG, Nuzzo D. Editorial: Nutrition for an aging brain. Front Nutr 2024; 11:1405643. [PMID: 38868552 PMCID: PMC11167093 DOI: 10.3389/fnut.2024.1405643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 04/19/2024] [Indexed: 06/14/2024] Open
Affiliation(s)
- Elżbieta Wieczorek
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
| | - David Vauzour
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, United Kingdom
| | - Matthew G. Pontifex
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, United Kingdom
| | - Domenico Nuzzo
- Institute for Biomedical Research and Innovation, National Research Council of Italy, Palermo, Italy
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3
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Liu Y, Tan Y, Zhang Z, Yi M, Zhu L, Peng W. The interaction between ageing and Alzheimer's disease: insights from the hallmarks of ageing. Transl Neurodegener 2024; 13:7. [PMID: 38254235 PMCID: PMC10804662 DOI: 10.1186/s40035-024-00397-x] [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: 09/13/2023] [Revised: 12/31/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
Ageing is a crucial risk factor for Alzheimer's disease (AD) and is characterised by systemic changes in both intracellular and extracellular microenvironments that affect the entire body instead of a single organ. Understanding the specific mechanisms underlying the role of ageing in disease development can facilitate the treatment of ageing-related diseases, such as AD. Signs of brain ageing have been observed in both AD patients and animal models. Alleviating the pathological changes caused by brain ageing can dramatically ameliorate the amyloid beta- and tau-induced neuropathological and memory impairments, indicating that ageing plays a crucial role in the pathophysiological process of AD. In this review, we summarize the impact of several age-related factors on AD and propose that preventing pathological changes caused by brain ageing is a promising strategy for improving cognitive health.
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Affiliation(s)
- Yuqing Liu
- Department of Integrated Traditional Chinese and Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
- National Clinical Research Center for Metabolic Diseases, Changsha, 410011, People's Republic of China
| | - Yejun Tan
- School of Mathematics, University of Minnesota Twin Cities, Minneapolis, MN, 55455, USA
| | - Zheyu Zhang
- Department of Integrated Traditional Chinese and Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
- National Clinical Research Center for Metabolic Diseases, Changsha, 410011, People's Republic of China
| | - Min Yi
- Department of Integrated Traditional Chinese and Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
- National Clinical Research Center for Metabolic Diseases, Changsha, 410011, People's Republic of China
| | - Lemei Zhu
- Academician Workstation, Changsha Medical University, Changsha, 410219, People's Republic of China
| | - Weijun Peng
- Department of Integrated Traditional Chinese and Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China.
- National Clinical Research Center for Metabolic Diseases, Changsha, 410011, People's Republic of China.
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4
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Shi H, Zhao Y. Modulation of Tau Pathology in Alzheimer's Disease by Dietary Bioactive Compounds. Int J Mol Sci 2024; 25:831. [PMID: 38255905 PMCID: PMC10815728 DOI: 10.3390/ijms25020831] [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: 10/31/2023] [Revised: 01/02/2024] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
Tau is a microtubule-associated protein essential for microtubule assembly and stability in neurons. The abnormal intracellular accumulation of tau aggregates is a major characteristic of brains from patients with Alzheimer's disease (AD) and other tauopathies. In AD, the presence of neurofibrillary tangles (NFTs), which is composed of hyperphosphorylated tau protein, is positively correlated with the severity of the cognitive decline. Evidence suggests that the accumulation and aggregation of tau cause synaptic dysfunction and neuronal degeneration. Thus, the prevention of abnormal tau phosphorylation and elimination of tau aggregates have been proposed as therapeutic strategies for AD. However, currently tau-targeting therapies for AD and other tauopathies are limited. A number of dietary bioactive compounds have been found to modulate the posttranslational modifications of tau, including phosphorylation, small ubiquitin-like modifier (SUMO) mediated modification (SUMOylation) and acetylation, as well as inhibit tau aggregation and/or promote tau degradation. The advantages of using these dietary components over synthetic substances in AD prevention and intervention are their safety and accessibility. This review summarizes the mechanisms leading to tau pathology in AD and highlights the effects of bioactive compounds on the hyperphosphorylation, aggregation and clearance of tau protein. The potential of using these bioactive compounds for AD prevention and intervention is also discussed.
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Affiliation(s)
- Huahua Shi
- Department of Bioengineering, Harbin Institute of Technology, Weihai 264209, China;
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yan Zhao
- Department of Bioengineering, Harbin Institute of Technology, Weihai 264209, China;
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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5
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Li S, Cai Y, Guan T, Zhang Y, Huang K, Zhang Z, Cao W, Guan X. Quinic acid alleviates high-fat diet-induced neuroinflammation by inhibiting DR3/IKK/NF-κB signaling via gut microbial tryptophan metabolites. Gut Microbes 2024; 16:2374608. [PMID: 38972055 PMCID: PMC11229714 DOI: 10.1080/19490976.2024.2374608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 06/26/2024] [Indexed: 07/09/2024] Open
Abstract
With the increasing of aging population and the consumption of high-fat diets (HFD), the incidence of Alzheimer's disease (AD) has skyrocketed. Natural antioxidants show promising potential in the prevention of AD, as oxidative stress and neuroinflammation are two hallmarks of AD pathogenesis. Here, we showed that quinic acid (QA), a polyphenol derived from millet, significantly decreased HFD-induced brain oxidative stress and neuroinflammation and the levels of Aβ and p-Tau. Examination of gut microbiota suggested the improvement of the composition of gut microbiota in HFD mice after QA treatment. Metabolomic analysis showed significant increase of gut microbial tryptophan metabolites indole-3-acetic acid (IAA) and kynurenic acid (KYNA) by QA. In addition, IAA and KYNA showed negative correlation with pro-inflammatory factors and AD indicators. Further experiments on HFD mice proved that IAA and KYNA could reproduce the effects of QA that suppress brain oxidative stress and inflammation and decrease the levels of of Aβ and p-Tau. Transcriptomics analysis of brain after IAA administration revealed the inhibition of DR3/IKK/NF-κB signaling pathway by IAA. In conclusion, this study demonstrated that QA could counteract HFD-induced brain oxidative stress and neuroinflammation by regulating inflammatory DR3/IKK/NF-κB signaling pathway via gut microbial tryptophan metabolites.
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Affiliation(s)
- Sen Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Yuwei Cai
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Tong Guan
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Yu Zhang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Kai Huang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Ze Zhang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Wangqing Cao
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiao Guan
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, University of Shanghai for Science and Technology, Shanghai, China
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6
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Gajowniczek-Ałasa D, Szwajgier D, Baranowska-Wójcik E. Plant Soup Formulations Show Cholinesterase Inhibition Potential in the Prevention of Alzheimer's Disease. Curr Alzheimer Res 2024; 21:81-89. [PMID: 38523524 DOI: 10.2174/0115672050306101240321050146] [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: 01/31/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/26/2024]
Abstract
BACKGROUND As the cholinesterase theory is a prominent hypothesis underlying our current understanding of Alzheimer's disease (AD), the goal of this study was to compose functional vegan lunchtime soups with potential health benefits in the prevention of AD (in the context of cholinesterase inhibition). MATERIALS AND METHODS The potential of 36 edible plant raw materials in terms of acetyl- and butyrylcholinesterase inhibition was investigated using a 96-well microplate reader. The most promising ingredients were combined to obtain 18 palatable vegetable soup recipes with 6 dominant flavor, appearance, and aroma variants. To shortlist candidates for in-depth analysis and potential consideration in industrial production, our team performed a sensory analysis of the soups. RESULTS The white boletus soup exhibited the highest potential for cholinesterase inhibition, further bolstered by the inclusion of other ingredients known for their elevated capacity to inhibit both AChE and BChE. Ingredients such as blackthorn (Prunus spinosa), garlic, and white potato contributed significantly to this inhibitory effect (nearly 100% of AChE inhibition). Notably, intriguing results were also observed for asparagus soup, despite the fact that the inhibitory potential of asparagus itself is negligible compared to other raw materials. The success of the asparagus soup lies in the meticulous selection of various ingredients, each contributing to its overall effectiveness. It was observed that mushroom soups scored the highest in this respect, while the team members' response to nettle soup was the least favorable. CONCLUSION The outcomes of our study should serve as a catalyst for further exploration of this important research domain. Our current research focuses on deeper insights into the potential of comprehensive meal options. Furthermore, the synergy/antagonism/non-interaction between respective soup ingredients as well as elements of individual soups' chemical composition is a very interesting topic currently under our intensive scientific investigation.
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Affiliation(s)
- Dorota Gajowniczek-Ałasa
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Skromna 8, 20-704, Lublin, Poland
| | - Dominik Szwajgier
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Skromna 8, 20-704, Lublin, Poland
| | - Ewa Baranowska-Wójcik
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Skromna 8, 20-704, Lublin, Poland
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7
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Daly T. Improving Clinical Trials of Antioxidants in Alzheimer's Disease. J Alzheimers Dis 2024; 99:S171-S181. [PMID: 37781800 DOI: 10.3233/jad-230308] [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] [Indexed: 10/03/2023]
Abstract
Maintaining diversity in drug development in research into Alzheimer's disease (AD) is necessary to avoid over-reliance on targeting AD neuropathology. Treatments that reduce or prevent the generation of oxidative stress, frequently cited for its causal role in the aging process and AD, could be useful in at-risk populations or diagnosed AD patients. However, in this review, it is argued that clinical research into antioxidants in AD could provide more useful feedback as to the therapeutic value of the oxidative stress theory of AD. Improving comparability between randomized controlled trials (RCTs) is vital from a waste-reduction and priority-setting point of view for AD clinical research. For as well as attempting to improve meaningful outcomes for patients, RCTs of antioxidants in AD should strive to maximize the extraction of clinically useful information and actionable feedback from trial outcomes. Solutions to maximize information flow from RCTs of antioxidants in AD are offered here in the form of checklist questions to improve ongoing and future trials centered around the following dimensions: adhesion to reporting guidelines like CONSORT, biomarker enrichment, simple tests of treatment, and innovative trial design.
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Affiliation(s)
- Timothy Daly
- Science Norms Democracy UMR 8011, Sorbonne Université, Paris, France
- Bioethics Program, FLACSO Argentina, Buenos Aires, Argentina
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8
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Skaperda Z, Tekos F, Vardakas P, Nechalioti PM, Kourti M, Patouna A, Makri S, Gkasdrogka M, Kouretas D. Development of a Holistic In Vitro Cell-Free Approach to Determine the Redox Bioactivity of Agricultural Products. Int J Mol Sci 2023; 24:16447. [PMID: 38003634 PMCID: PMC10671064 DOI: 10.3390/ijms242216447] [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: 10/24/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
In recent years, there has been a strong consumer demand for food products that provide nutritional benefits to human health. Therefore, the assessment of the biological activity is considered as an important parameter for the promotion of high-quality food products. Herein, we introduce a novel methodology comprising a complete set of in vitro cell-free screening techniques for the evaluation of the bioactivity of various food products on the basis of their antioxidant capacity. These assays examine the free radical scavenging activities, the reducing properties, and the protective ability against oxidative damage to biomolecules. The adoption of the proposed battery of antioxidant assays is anticipated to contribute to the holistic characterization of the bioactivity of the food product under examination. Consumer motivations and expectations with respect to nutritious food products with bio-functional properties drive the global food market toward food certification. Therefore, the development and application of scientific methodologies that examine the quality characteristics of food products could increase consumers' trust and promote their beneficial properties for human health.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Demetrios Kouretas
- Department of Biochemistry and Biotechnology, University of Thessaly, 41500 Larissa, Greece; (Z.S.); (F.T.); (P.V.); (M.K.); (A.P.); (S.M.); (M.G.)
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9
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Shi A, Long Y, Ma Y, Yu S, Li D, Deng J, Wen J, Li X, Wu Y, He X, Hu Y, Li N, Hu Y. Natural essential oils derived from herbal medicines: A promising therapy strategy for treating cognitive impairment. Front Aging Neurosci 2023; 15:1104269. [PMID: 37009463 PMCID: PMC10060871 DOI: 10.3389/fnagi.2023.1104269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/21/2023] [Indexed: 03/18/2023] Open
Abstract
Cognitive impairment (CI), mainly Alzheimer’s disease (AD), continues to increase in prevalence and is emerging as one of the major health problems in society. However, until now, there are no first-line therapeutic agents for the allopathic treatment or reversal of the disease course. Therefore, the development of therapeutic modalities or drugs that are effective, easy to use, and suitable for long-term administration is important for the treatment of CI such as AD. Essential oils (EOs) extracted from natural herbs have a wide range of pharmacological components, low toxicity, and wide sources, In this review, we list the history of using volatile oils against cognitive disorders in several countries, summarize EOs and monomeric components with cognitive improvement effects, and find that they mainly act by attenuating the neurotoxicity of amyloid beta, anti-oxidative stress, modulating the central cholinergic system, and improving microglia-mediated neuroinflammation. And combined with aromatherapy, the unique advantages and potential of natural EOs in the treatment of AD and other disorders were discussed. This review hopes to provide scientific basis and new ideas for the development and application of natural medicine EOs in the treatment of CI.
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Affiliation(s)
- Ai Shi
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yu Long
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yin Ma
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shuang Yu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jie Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jing Wen
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaoqiu Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuanyuan Wu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaofang He
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yue Hu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Nan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Nan Li,
| | - Yuan Hu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Yuan Hu,
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10
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Zhou C, Zhang J, Luo X, Lian F, Zeng Y, Zhang Z, Zhang H, Zhang N. Sodium Oligomannate Electrostatically Binds to Aβ and Blocks Its Aggregation. J Phys Chem B 2023; 127:1983-1994. [PMID: 36848623 DOI: 10.1021/acs.jpcb.3c00280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
GV-971 (sodium oligomannate) is a China Food and Drug Administration (CFDA)-approved drug for treating Alzheimer's disease, and it could inhibit Aβ fibril formation in vitro and in mouse studies. To elucidate the mechanisms for understanding how GV-971 modulates Aβ's aggregation, we conducted a systematic biochemical and biophysical study of Aβ40/Aβ42:GV-971 systems. The integrating analysis of previously published data and our results suggests that the multisite electrostatic interactions between GV-971's carboxylic groups and Aβ40/Aβ42's three histidine residues might play a dominant role in driving the binding of GV-971 to Aβ. The fuzzy-type electrostatic interactions between GV-971 and Aβ are expected to protect Aβ from aggregation potentially through breaking the histidine-mediated inter-Aβ electrostatic interactions. Meanwhile, since GV-971's binding exhibited a slight downregulation effect on the flexibility of Aβ's histidine-colonized fragment, which potentially favors Aβ aggregation, we conclude that the dynamics alteration plays a minor role in GV-971's modulation on Aβ aggregation.
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Affiliation(s)
- Chen Zhou
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Jingjing Zhang
- Center for Neurological and Psychiatric Research and Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xinwen Luo
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Fulin Lian
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Yangyang Zeng
- Green Valley (Shanghai) Pharmaceuticals Co., Ltd., Shanghai 201203, China
| | - Zhenqing Zhang
- School of Pharmaceutical Science, Soochow University, Suzhou 215123, Jiangsu, China
| | - Haiyan Zhang
- Center for Neurological and Psychiatric Research and Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Naixia Zhang
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of the Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
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11
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Khan S, Hassan MI, Shahid M, Islam A. Nature's Toolbox Against Tau Aggregation: An Updated Review of Current Research. Ageing Res Rev 2023; 87:101924. [PMID: 37004844 DOI: 10.1016/j.arr.2023.101924] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/21/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
Tau aggregation is a hallmark of several neurodegenerative disorders, such as Alzheimer's disease (AD), frontotemporal dementia, and progressive supranuclear palsy. Hyperphosphorylated tau is believed to contribute to the degeneration of neurons and the development of these complex diseases. Therefore, one potential treatment for these illnesses is to prevent or counteract tau aggregation. In recent years, interest has been increasing in developing nature-derived tau aggregation inhibitors as a potential treatment for neurodegenerative disorders. Researchers have become increasingly interested in natural compounds with multifunctional features, such as flavonoids, alkaloids, resveratrol, and curcumin, since these molecules can interact simultaneously with the various targets of AD. Recent studies have demonstrated that several natural compounds can inhibit tau aggregation and promote the disassembly of pre-formed tau aggregates. Nature-derived tau aggregation inhibitors hold promise as a potential treatment for neurodegenerative disorders. However, it is important to note that more research is needed to fully understand the mechanisms by which these compounds exert their effects and their safety and efficacy in preclinical and clinical studies. Nature-derived inhibitors of tau aggregation are a promising new direction in the research of neurodegenerative complexities. This review focuses on the natural products that have proven to be a rich supply for inhibitors in tau aggregation and their uses in neurodegenerative complexities, including AD.
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12
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A Multifunctional (-)-Meptazinol-Serotonin Hybrid Ameliorates Oxidative Stress-Associated Apoptotic Neuronal Death and Memory Deficits via Activating the Nrf2/Antioxidant Enzyme Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:6935947. [PMID: 36819782 PMCID: PMC9935814 DOI: 10.1155/2023/6935947] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/10/2022] [Accepted: 01/18/2023] [Indexed: 02/11/2023]
Abstract
The pathogenesis of Alzheimer's disease (AD) involves multiple pathophysiological processes. Oxidative stress is a major cause of AD-associated neuronal injury. The current research was designed to examine whether a novel (-)-meptazinol-serotonin hybrid (Mep-S) with potent antioxidant activity and additional inhibitory properties for acetylcholinesterase (AChE) activity could attenuate oxidative neuronal damage and cognitive deficits. In human SH-SY5Y cells, Mep-S suppressed H2O2-induced apoptosis by restoring mitochondrial membrane potential and inhibiting caspase-3 activation. Meanwhile, it attenuated oxidative stress elicited by H2O2 through lessening generation of reactive oxygen species as well as enhancing production of glutathione (GSH) and activity of superoxide dismutase (SOD). Mechanistically, Mep-S promoted nuclear translocation of a transcription factor nuclear factor E2-related factor-2 (Nrf2) in H2O2-challenged cells. This effect was accompanied by reduction in Kelch-like ECH-associated protein-1 (Keap1) levels as well as augmentation of Akt phosphorylation and expression of heme oxygenase-1 (HO-1) and NAD(P)H quinine oxidoreductase-1 (NQO-1). Molecular docking analysis revealed that Mep-S may disrupt the protein-protein interactions between Keap1 and Nrf2. In an in vivo mouse model, Mep-S attenuated scopolamine-caused cognitive deficits with inhibition of apoptotic neuronal death and brain AChE activity. Furthermore, the scopolamine-induced impairment of total antioxidant capacity and reduction in SOD1, SOD2, and γ-glutamate-cysteine ligase expression in the brain were counteracted by Mep-S, accompanied by decreased Keap1 levels, increased Akt catalytic subunit and Nrf2 phosphorylation, and decreased Nrf2, HO-1, and NQO-1 expression. Collectively, our results suggest that Mep-S ameliorates apoptotic neuronal death and memory dysfunction associated with oxidative stress by regulating the Nrf2/antioxidant enzyme pathway through inactivating Keap1 and phosphorylating Nrf2 via Akt activation. Therefore, Mep-S may be a potential lead for multitarget neuroprotective agents to treat AD-like symptoms.
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Das B, Bhardwaj PK, Sharma N, Sarkar A, Haldar PK, Mukherjee PK. Evaluation of Mollugo oppositifolia Linn. as cholinesterase and β-secretase enzymes inhibitor. Front Pharmacol 2023; 13:990926. [PMID: 36686717 PMCID: PMC9846241 DOI: 10.3389/fphar.2022.990926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 12/05/2022] [Indexed: 01/05/2023] Open
Abstract
Mollugo oppositifolia Linn. is traditionally used in neurological complications. The study aimed to investigate in-vitro neuroprotective effect of the plant extracts through testing against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and β-secretase linked to Alzheimer's disease (AD). To understand the safety aspects, the extracts were tested for CYP450 isozymes and human hepatocellular carcinoma cell (HepG2) inhibitory potential. The heavy metal contents were estimated using atomic absorption spectroscopy (AAS). Further, the antioxidant capacities as well as total phenolic content and total flavonoid content (TFC) were measured spectrophotometrically. UPLC-QTOF-MS/MS analysis was employed to identify phytometabolites present in the extract. The interactions of the ligands with the target proteins (AChE, BChE, and BACE-1) were studied using AutoDockTools 1.5.6. The results showed that M. oppositifolia extract has more selectivity towards BChE (IC50 = 278.23 ± 1.89 μg/ml) as compared to AChE (IC50 = 322.87 ± 2.05 μg/ml). The IC50 value against β-secretase was 173.93 μg/ml. The extract showed a CC50 value of 965.45 ± 3.07 μg/ml against HepG2 cells and the AAS analysis showed traces of lead 0.02 ± 0.001 which was found to be within the WHO prescribed limits. Moreover, the IC50 values against CYP3A4 (477.03 ± 2.01 μg/ml) and CYP2D6 (249.65 ± 2.46 μg/ml) isozymes justify the safety aspects of the extract. The in silico molecular docking analysis of the target enzymes showed that the compound menthoside was found to be the most stable and showed a good docking score among all the identified metabolites. Keeping in mind the multi-targeted drug approach, the present findings suggested that M. oppositifolia extract have anti-Alzheimer's potential.
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Affiliation(s)
- Bhaskar Das
- School of Natural Product Studies, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India,Institute of Bioresources and Sustainable Development, Department of Biotechnology, Government of India, Imphal, India
| | - Pardeep K. Bhardwaj
- Institute of Bioresources and Sustainable Development, Department of Biotechnology, Government of India, Imphal, India,*Correspondence: Pardeep K. Bhardwaj,
| | - Nanaocha Sharma
- Institute of Bioresources and Sustainable Development, Department of Biotechnology, Government of India, Imphal, India
| | - Arnab Sarkar
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Pallab Kanti Haldar
- School of Natural Product Studies, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Pulok K. Mukherjee
- Institute of Bioresources and Sustainable Development, Department of Biotechnology, Government of India, Imphal, India
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Cock IE, Baghtchedjian L, Cordon ME, Dumont E. Phytochemistry, Medicinal Properties, Bioactive Compounds, and Therapeutic Potential of the Genus Eremophila (Scrophulariaceae). MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227734. [PMID: 36431834 PMCID: PMC9697388 DOI: 10.3390/molecules27227734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/01/2022] [Accepted: 11/08/2022] [Indexed: 11/12/2022]
Abstract
The genus Eremophila (family Scrophulariaceae) consists of approximately 200 species that are widely distributed in the semi-arid and arid regions of Australia. Multiple Eremophila spp. are used as traditional medicines by the First Australians in the areas in which they grow. They are used for their antibacterial, antifungal, antiviral, antioxidant, anti-diabetic, anti-inflammatory, and cardiac properties. Many species of this genus are beneficial against several diseases and ailments. The antibacterial properties of the genus have been relatively well studied, with several important compounds identified and their mechanisms studied. In particular, Eremophila spp. are rich in terpenoids, and the antimicrobial bioactivities of many of these compounds have already been confirmed. The therapeutic properties of Eremophila spp. preparations and purified compounds have received substantially less attention, and much study is required to validate the traditional uses and to highlight species that warrant further investigation as drug leads. The aim of this study is to review and summarise the research into the medicinal properties, therapeutic mechanisms, and phytochemistry of Eremophila spp., with the aim of focussing future studies into the therapeutic potential of this important genus.
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Affiliation(s)
- Ian Edwin Cock
- Centre for Planetary Health and Food Security, Griffith University, Brisbane 4127, Australia
- Correspondence: ; Tel.: +61-7-3735-7637
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Therapeutic Antiaging Strategies. Biomedicines 2022; 10:biomedicines10102515. [PMID: 36289777 PMCID: PMC9599338 DOI: 10.3390/biomedicines10102515] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/21/2022] [Accepted: 09/24/2022] [Indexed: 11/17/2022] Open
Abstract
Aging constitutes progressive physiological changes in an organism. These changes alter the normal biological functions, such as the ability to manage metabolic stress, and eventually lead to cellular senescence. The process itself is characterized by nine hallmarks: genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, and altered intercellular communication. These hallmarks are risk factors for pathologies, such as cardiovascular diseases, neurodegenerative diseases, and cancer. Emerging evidence has been focused on examining the genetic pathways and biological processes in organisms surrounding these nine hallmarks. From here, the therapeutic approaches can be addressed in hopes of slowing the progression of aging. In this review, data have been collected on the hallmarks and their relative contributions to aging and supplemented with in vitro and in vivo antiaging research experiments. It is the intention of this article to highlight the most important antiaging strategies that researchers have proposed, including preventive measures, systemic therapeutic agents, and invasive procedures, that will promote healthy aging and increase human life expectancy with decreased side effects.
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Menardi A, Dotti L, Ambrosini E, Vallesi A. Transcranial magnetic stimulation treatment in Alzheimer's disease: a meta-analysis of its efficacy as a function of protocol characteristics and degree of personalization. J Neurol 2022; 269:5283-5301. [PMID: 35781536 PMCID: PMC9468063 DOI: 10.1007/s00415-022-11236-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/14/2022] [Accepted: 06/14/2022] [Indexed: 12/06/2022]
Abstract
Alzheimer's disease (AD) represents the most common type of neurodegenerative disorder. Although our knowledge on the causes of AD remains limited and no curative treatments are available, several interventions have been proposed in trying to improve patients' symptomatology. Among those, transcranial magnetic stimulation (TMS) has been shown a promising, safe and noninvasive intervention to improve global cognitive functioning. Nevertheless, we currently lack agreement between research studies on the optimal stimulation protocol yielding the highest efficacy in these patients. To answer this query, we conducted a systematic literature search in PubMed, PsycINFO and Scopus databases and meta-analysis of studies published in the last 10 years (2010-2021) according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Differently from prior published meta-analytic work, we investigated whether protocols that considered participants-specific neuroimaging scans for the selection of individualized stimulation targets held more successful outcomes compared to those relying on a generalized targeting selection criteria. We then compared the effect sizes of subsets of studies based on additional protocol characteristics (frequency, duration of intervention, number of stimulation sites, use of concomitant cognitive training and patients' educational level). Our results confirm TMS efficacy in improving global cognitive functioning in mild-to-moderate AD patients, but also highlight the flaws of current protocols characteristics, including a possible lack of sufficient personalization in stimulation protocols.
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Affiliation(s)
- Arianna Menardi
- Department of Neuroscience, University of Padova, 35121, Padua, Italy.
- Padova Neuroscience Center, University of Padova, Padua, Italy.
| | - Lisa Dotti
- Department of General Psychology, University of Padova, Padua, Italy
| | - Ettore Ambrosini
- Department of Neuroscience, University of Padova, 35121, Padua, Italy
- Padova Neuroscience Center, University of Padova, Padua, Italy
- Department of General Psychology, University of Padova, Padua, Italy
| | - Antonino Vallesi
- Department of Neuroscience, University of Padova, 35121, Padua, Italy
- Padova Neuroscience Center, University of Padova, Padua, Italy
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Systemic Inflammation Predicts Alzheimer Pathology in Community Samples without Dementia. Biomedicines 2022; 10:biomedicines10061240. [PMID: 35740262 PMCID: PMC9219863 DOI: 10.3390/biomedicines10061240] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/06/2022] [Accepted: 04/18/2022] [Indexed: 02/01/2023] Open
Abstract
Neuroinflammation and oxidative stress (OS) are implicated in the pathophysiology of Alzheimer’s disease (AD). However, it is unclear at what stage of the disease process inflammation first becomes manifest. The aim of this study was to investigate the associations between specific plasma markers of inflammation and OS, tau, and Amyloid-β 38, 40, and 42 levels in cognitively unimpaired middle-age and older individuals. Associations between inflammatory states identified through principal component analysis and AD biomarkers were investigated in middle-age (52–56 years, n = 335, 52% female) and older-age (72–76 years, n = 351, 46% female) participants without dementia. In middle-age, a component reflecting variation in OS was most strongly associated with tau and to a lesser extent amyloid-β levels. In older-age, a similar component to that observed in middle-age was only associated with tau, while another component reflecting heightened inflammation independent of OS, was associated with all AD biomarkers. In middle and older-age, inflammation and OS states are associated with plasma AD biomarkers.
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Recent trends of natural based therapeutics for mitochondria targeting in Alzheimer’s disease. Mitochondrion 2022; 64:112-124. [DOI: 10.1016/j.mito.2022.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/23/2022] [Accepted: 03/28/2022] [Indexed: 12/13/2022]
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Antioxidants in Alzheimer's Disease: Current Therapeutic Significance and Future Prospects. BIOLOGY 2022; 11:biology11020212. [PMID: 35205079 PMCID: PMC8869589 DOI: 10.3390/biology11020212] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 01/27/2023]
Abstract
Alzheimer's disease (AD) rate is accelerating with the increasing aging of the world's population. The World Health Organization (WHO) stated AD as a global health priority. According to the WHO report, around 82 million people in 2030 and 152 million in 2050 will develop dementia (AD contributes 60% to 70% of cases), considering the current scenario. AD is the most common neurodegenerative disease, intensifying impairments in cognition, behavior, and memory. Histopathological AD variations include extracellular senile plaques' formation, tangling of intracellular neurofibrils, and synaptic and neuronal loss in the brain. Multiple evidence directly indicates that oxidative stress participates in an early phase of AD before cytopathology. Moreover, oxidative stress is induced by almost all misfolded protein lumps like α-synuclein, amyloid-β, and others. Oxidative stress plays a crucial role in activating and causing various cell signaling pathways that result in lesion formations of toxic substances, which foster the development of the disease. Antioxidants are widely preferred to combat oxidative stress, and those derived from natural sources, which are often incorporated into dietary habits, can play an important role in delaying the onset as well as reducing the progression of AD. However, this approach has not been extensively explored yet. Moreover, there has been growing evidence that a combination of antioxidants in conjugation with a nutrient-rich diet might be more effective in tackling AD pathogenesis. Thus, considering the above-stated fact, this comprehensive review aims to elaborate the basics of AD and antioxidants, including the vitality of antioxidants in AD. Moreover, this review may help researchers to develop effectively and potentially improved antioxidant therapeutic strategies for this disease as it also deals with the clinical trials in the stated field.
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Collins AE, Saleh TM, Kalisch BE. Naturally Occurring Antioxidant Therapy in Alzheimer's Disease. Antioxidants (Basel) 2022; 11:213. [PMID: 35204096 PMCID: PMC8868221 DOI: 10.3390/antiox11020213] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 02/06/2023] Open
Abstract
It is estimated that the prevalence rate of Alzheimer's disease (AD) will double by the year 2040. Although currently available treatments help with symptom management, they do not prevent, delay the progression of, or cure the disease. Interestingly, a shared characteristic of AD and other neurodegenerative diseases and disorders is oxidative stress. Despite profound evidence supporting the role of oxidative stress in the pathogenesis and progression of AD, none of the currently available treatment options address oxidative stress. Recently, attention has been placed on the use of antioxidants to mitigate the effects of oxidative stress in the central nervous system. In preclinical studies utilizing cellular and animal models, natural antioxidants showed therapeutic promise when administered alone or in combination with other compounds. More recently, the concept of combination antioxidant therapy has been explored as a novel approach to preventing and treating neurodegenerative conditions that present with oxidative stress as a contributing factor. In this review, the relationship between oxidative stress and AD pathology and the neuroprotective role of natural antioxidants from natural sources are discussed. Additionally, the therapeutic potential of natural antioxidants as preventatives and/or treatment for AD is examined, with special attention paid to natural antioxidant combinations and conjugates that are currently being investigated in human clinical trials.
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Affiliation(s)
| | | | - Bettina E. Kalisch
- Department of Biomedical Sciences and Collaborative Specialization in Neuroscience Program, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.E.C.); (T.M.S.)
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Tretter V, Hochreiter B, Zach ML, Krenn K, Klein KU. Understanding Cellular Redox Homeostasis: A Challenge for Precision Medicine. Int J Mol Sci 2021; 23:ijms23010106. [PMID: 35008532 PMCID: PMC8745322 DOI: 10.3390/ijms23010106] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 12/16/2022] Open
Abstract
Living organisms use a large repertoire of anabolic and catabolic reactions to maintain their physiological body functions, many of which include oxidation and reduction of substrates. The scientific field of redox biology tries to understand how redox homeostasis is regulated and maintained and which mechanisms are derailed in diverse pathological developments of diseases, where oxidative or reductive stress is an issue. The term “oxidative stress” is defined as an imbalance between the generation of oxidants and the local antioxidative defense. Key mediators of oxidative stress are reactive species derived from oxygen, nitrogen, and sulfur that are signal factors at physiological concentrations but can damage cellular macromolecules when they accumulate. However, therapeutical targeting of oxidative stress in disease has proven more difficult than previously expected. Major reasons for this are the very delicate cellular redox systems that differ in the subcellular compartments with regard to their concentrations and depending on the physiological or pathological status of cells and organelles (i.e., circadian rhythm, cell cycle, metabolic need, disease stadium). As reactive species are used as signaling molecules, non-targeted broad-spectrum antioxidants in many cases will fail their therapeutic aim. Precision medicine is called to remedy the situation.
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22
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de la Rubia Ortí JE, Fernández D, Platero F, García-Pardo MP. Can Ketogenic Diet Improve Alzheimer's Disease? Association With Anxiety, Depression, and Glutamate System. Front Nutr 2021; 8:744398. [PMID: 34778340 PMCID: PMC8579917 DOI: 10.3389/fnut.2021.744398] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/20/2021] [Indexed: 12/26/2022] Open
Abstract
Background: Alzheimer's disease is the most common neurodegenerative disorder in our society, mainly characterized by loss of cognitive function. However, other symptoms such as anxiety and depression have been described in patients. The process is mediated by alterations in the synaptic and extrasynaptic activity of the neurotransmitter glutamate, which are linked to a hypometabolism of glucose as the main source of brain energy. In that respect, Ketogenic diet (KD) has been proposed as a non-pharmacological treatment serving as an alternative energy source to the neurons increasing the fat percentage and reducing the carbohydrates percentage, showing promising results to improve the cognitive symptoms associated with different neurodegenerative disorders, including AD. However, the association of this type of diet with emotional symptoms and the modulation of glutamate neurotransmission systems after this dietary reduction of carbohydrates are unknown. Objective: The aim of this short review is to provide update studies and discuss about the relationship between KD, anxiety, depression, and glutamate activity in AD patients. Discussion: The main results suggest that the KD is an alternative energy source for neurons in AD with positive consequences for the brain at different levels such as epigenetic, metabolic and signaling, and that the substitution of carbohydrates for fats is also associated with emotional symptoms and glutamate activity in AD.
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Affiliation(s)
| | - David Fernández
- Department of Nursing, Catholic University of Valencia, Valencia, Spain
| | - Félix Platero
- Department of Medicine, University of Valencia, Valencia, Spain
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Christopher Kwon YI, Xie W, Zhu H, Xie J, Shinn K, Juckel N, Vince R, More SS, Lee MK. γ-Glutamyl-Transpeptidase-Resistant Glutathione Analog Attenuates Progression of Alzheimer's Disease-like Pathology and Neurodegeneration in a Mouse Model. Antioxidants (Basel) 2021; 10:antiox10111796. [PMID: 34829667 PMCID: PMC8614797 DOI: 10.3390/antiox10111796] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/26/2021] [Accepted: 11/08/2021] [Indexed: 02/01/2023] Open
Abstract
Oxidative stress in Alzheimer’s disease (AD) is mediated, in part, by the loss of glutathione (GSH). Previous studies show that γ-glutamyl transpeptidase (GGT)-resistant GSH analog, Ψ-GSH, improves brain GSH levels, reduces oxidative stress markers in brains of APP/PS1 transgenic mice, a mouse model of AD, and attenuates early memory deficits in the APP/PS1 model. Herein, we examined whether Ψ-GSH can attenuate the disease progression when administered following the onset of AD-like pathology in vivo. Cohorts of APP/PS1 mice were administered Ψ-GSH for 2 months starting at 8 month or 12 months of age. We show that Ψ-GSH treatment reduces indices of oxidative stress in older mice by restoration of enzyme glyoxalase-1 (Glo-1) activity and reduces levels of insoluble Aβ. Quantitative neuropathological analyses show that Ψ-GSH treatment significantly reduces Aβ deposition and brain inflammation in APP/PS1 mice compared to vehicle-treated mice. More importantly, Ψ-GSH treatment attenuated the progressive loss of cortical TH+ afferents and the loss of TH+ neurons in the locus coeruleus (LC). Collectively, the results show that Ψ-GSH exhibits significant antioxidant activity in aged APP/PS1 mice and chronic Ψ-GSH treatment administered after the onset of AD pathology can reverse/slow further progression of AD-like pathology and neurodegeneration in vivo.
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Affiliation(s)
- Ye In Christopher Kwon
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA; (Y.I.C.K.); (K.S.); (N.J.)
| | - Wei Xie
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (W.X.); (H.Z.); (J.X.); (R.V.)
| | - Haizhou Zhu
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (W.X.); (H.Z.); (J.X.); (R.V.)
| | - Jiashu Xie
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (W.X.); (H.Z.); (J.X.); (R.V.)
| | - Keaton Shinn
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA; (Y.I.C.K.); (K.S.); (N.J.)
| | - Nicholas Juckel
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA; (Y.I.C.K.); (K.S.); (N.J.)
| | - Robert Vince
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (W.X.); (H.Z.); (J.X.); (R.V.)
| | - Swati S. More
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (W.X.); (H.Z.); (J.X.); (R.V.)
- Correspondence: (S.S.M.); (M.K.L.)
| | - Michael K. Lee
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA; (Y.I.C.K.); (K.S.); (N.J.)
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
- Correspondence: (S.S.M.); (M.K.L.)
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Zhang S, Gai Z, Gui T, Chen J, Chen Q, Li Y. Antioxidant Effects of Protocatechuic Acid and Protocatechuic Aldehyde: Old Wine in a New Bottle. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:6139308. [PMID: 34790246 PMCID: PMC8592717 DOI: 10.1155/2021/6139308] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 10/15/2021] [Indexed: 01/03/2023]
Abstract
Phenolic compounds are naturally present as secondary metabolites in plant-based sources such as fruits, vegetables, and spices. They have received considerable attention for their antioxidant, anti-inflammatory, and anti-carcinogenic properties for protection against many chronic disorders such as neurodegenerative diseases, diabetes, cardiovascular diseases, and cancer. They are categorized into various groups based on their chemical structure and include phenolic acids, flavonoids, curcumins, tannins, and quinolones. Their structural variations contribute to their specific beneficial effects on human health. The antioxidant property of phenolic compounds protects against oxidative stress by up-regulation of endogenous antioxidants, scavenging free radicals, and anti-apoptotic activity. Protocatechuic acid (PCA; 3,4-dihydroxy benzoic acid) and protocatechuic aldehyde (PAL; 3,4-dihydroxybenzaldehyde) are naturally occurring polyphenols found in vegetables, fruits, and herbs. PCA and PAL are the primary metabolites of anthocyanins and proanthocyanidins, which have been shown to possess pharmacological actions including antioxidant activity in vitro and in vivo. This review aims to explore the therapeutic potential of PCA and PAL by comprehensively summarizing their pharmacological properties reported to date, with an emphasis on their mechanisms of action and biological properties.
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Affiliation(s)
- Shijun Zhang
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Zhibo Gai
- Key Laboratory of Traditional Chinese Medicine for Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Ting Gui
- Key Laboratory of Traditional Chinese Medicine for Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Juanli Chen
- The Institute for Tissue Engineering and Regenerative Medicine, The Liaocheng University/Liaocheng People's Hospital, Liaocheng, China
| | - Qingfa Chen
- The Institute for Tissue Engineering and Regenerative Medicine, The Liaocheng University/Liaocheng People's Hospital, Liaocheng, China
| | - Yunlun Li
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
- The Third Department of Cardiovascular Diseases, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250355, China
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25
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Neuroprotective Role of Polyphenols in Treatment of Neurological Disorders: A Review. Neuromodulation 2021. [DOI: 10.5812/ipmn.117170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
: The most frequent illnesses characterized by the gradual malfunctioning of brain neurons are neurodegenerative disorders (NDs). Genetic mutations and a range of biological processes can produce NDs. Alzheimer's disease (AD), Parkinson's disease (PD), and Multiple Sclerosis (MS) are all related to oxidative stress (OS). Reduced brain activity has become a greater health threat with a growing elderly population. It causes some pathophysiological alterations and is an important risk factor for a range of neurodegenerative illnesses. An increase in reactive oxygen species (ROS) can cause neuronal cell death, and it is thus essential to control ROS levels to maintain normal neuronal activity. Synthetic medicines are often used to treat neurological disorders; however, harmful effects have been reported. Multiple bodies of research have shown the effectiveness of polyphenols in the treatment of various NDs due to their negligible side effects. This review article describes the neuroprotection effects of polyphenols such as resveratrol, epigallocatechin-3-gallate, curcumin, and quercetin, as well as the signaling pathways and immune response controls through polyphenols.
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Erekat NS. Apoptosis and its therapeutic implications in neurodegenerative diseases. Clin Anat 2021; 35:65-78. [PMID: 34558138 DOI: 10.1002/ca.23792] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/19/2021] [Accepted: 09/21/2021] [Indexed: 12/18/2022]
Abstract
Neurodegenerative disorders are characterized by progressive loss of particular populations of neurons. Apoptosis has been implicated in the pathogenesis of neurodegenerative diseases, including Parkinson disease, Alzheimer disease, Huntington disease, and amyotrophic lateral sclerosis. In this review, we focus on the existing notions relevant to comprehending the apoptotic death process, including the morphological features, mediators and regulators of cellular apoptosis. We also highlight the evidence of neuronal apoptotic death in Parkinson disease, Alzheimer disease, Huntington disease, and amyotrophic lateral sclerosis. Additionally, we present evidence of potential therapeutic agents that could modify the apoptotic pathway in the aforementioned neurodegenerative diseases and delay disease progression. Finally, we review the clinical trials that were conducted to evaluate the use of anti-apoptotic drugs in the treatment of the aforementioned neurodegenerative diseases, in order to highlight the essential need for early detection and intervention of neurodegenerative diseases in humans.
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Affiliation(s)
- Nour S Erekat
- Department of Anatomy, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
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Avitan I, Halperin Y, Saha T, Bloch N, Atrahimovich D, Polis B, Samson AO, Braitbard O. Towards a Consensus on Alzheimer's Disease Comorbidity? J Clin Med 2021; 10:4360. [PMID: 34640387 PMCID: PMC8509357 DOI: 10.3390/jcm10194360] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/08/2021] [Accepted: 09/14/2021] [Indexed: 02/07/2023] Open
Abstract
Alzheimer's disease (AD) is often comorbid with other pathologies. First, we review shortly the diseases most associated with AD in the clinic. Then we query PubMed citations for the co-occurrence of AD with other diseases, using a list of 400 common pathologies. Significantly, AD is found to be associated with schizophrenia and psychosis, sleep insomnia and apnea, type 2 diabetes, atherosclerosis, hypertension, cardiovascular diseases, obesity, fibrillation, osteoporosis, arthritis, glaucoma, metabolic syndrome, pain, herpes, HIV, alcoholism, heart failure, migraine, pneumonia, dyslipidemia, COPD and asthma, hearing loss, and tobacco smoking. Trivially, AD is also found to be associated with several neurodegenerative diseases, which are disregarded. Notably, our predicted results are consistent with the previously published clinical data and correlate nicely with individual publications. Our results emphasize risk factors and promulgate diseases often associated with AD. Interestingly, the comorbid diseases are often degenerative diseases exacerbated by reactive oxygen species, thus underlining the potential role of antioxidants in the treatment of AD and comorbid diseases.
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Affiliation(s)
- Iska Avitan
- Bioinformatics Department, Jerusalem College of Technology, Jerusalem 9548311, Israel; (I.A.); (Y.H.)
| | - Yudit Halperin
- Bioinformatics Department, Jerusalem College of Technology, Jerusalem 9548311, Israel; (I.A.); (Y.H.)
| | - Trishna Saha
- Azrieli Faculty of Medicine, Bar Ilan University, Safed 1311502, Israel; (T.S.); (N.B.); (B.P.); (A.O.S.)
| | - Naamah Bloch
- Azrieli Faculty of Medicine, Bar Ilan University, Safed 1311502, Israel; (T.S.); (N.B.); (B.P.); (A.O.S.)
| | | | - Baruh Polis
- Azrieli Faculty of Medicine, Bar Ilan University, Safed 1311502, Israel; (T.S.); (N.B.); (B.P.); (A.O.S.)
- School of Medicine, Yale University, New Haven, CT 06520, USA
| | - Abraham O. Samson
- Azrieli Faculty of Medicine, Bar Ilan University, Safed 1311502, Israel; (T.S.); (N.B.); (B.P.); (A.O.S.)
| | - Ori Braitbard
- Bioinformatics Department, Jerusalem College of Technology, Jerusalem 9548311, Israel; (I.A.); (Y.H.)
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Ni L, Zhuge F, Yang S, Ma L, Zheng A, Zhao Y, Hu L, Fu Z, Ni Y. Hydrolyzed Chicken Meat Extract Attenuates Neuroinflammation and Cognitive Impairment in Middle-Aged Mouse by Regulating M1/M2 Microglial Polarization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:9800-9812. [PMID: 34404209 DOI: 10.1021/acs.jafc.1c03541] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Aging is the most common cause of several neurodegenerative disorders, such as Alzheimer's disease and Parkinson's disease. The pathological hallmarks of age-dependent neuropathology consist of chronic neuroinflammation, oxidative stress, gliosis, learning disability, and cognitive decline. A novel hydrolyzed bioactive peptide mixture extracted from chicken meat, that is, hydrolyzed chicken extract (HCE) has been previously demonstrated to exert neuroprotective effects in rodents and humans. However, the mechanism of HCE on age-related neurological disorders remains unclear. Herein, we aimed to clarify the impact and mechanism of isolated bioactive components (BCs) from HCE on age-dependent neuroinflammation and cognitive impairment in middle-aged mice. We found that both BC and HCE supplementation ameliorated age-induced memory loss, alleviated hippocampal neuroinflammation and oxidative stress, followed by promoting hippocampal neurogenesis in mice. BC and HCE treatment also ameliorated age-dependent morphological anomalies and alleviated microgliosis and astrogliosis. In parallel, BC and HCE treatment showed a significant decrease in the NF-κB p65 and p38 MAPK signaling, which were associated with the enhancement of antioxidative enzymes activities. Furthermore, BC treatment attenuated the neuroinflammatory phenotypes by the decrease in M1-polarized microglia and the increase in M2-polarized microglia in vivo and in vitro. In addition, we found that cyclo(Phe-Phe), one of the cyclopeptides purified from BC, showed notable anti-inflammatory effects in BV2 cells. Taken together, BC might be used as a dietary supplement for alleviating age-dependent neuropathology in middle-aged individuals.
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Affiliation(s)
- Liyang Ni
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Fen Zhuge
- Institute of Translational Medicine, The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310015, China
| | - Song Yang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Lingyan Ma
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Aqian Zheng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yufeng Zhao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Luting Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yinhua Ni
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
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Reveglia P, Paolillo C, Ferretti G, De Carlo A, Angiolillo A, Nasso R, Caputo M, Matrone C, Di Costanzo A, Corso G. Challenges in LC-MS-based metabolomics for Alzheimer's disease early detection: targeted approaches versus untargeted approaches. Metabolomics 2021; 17:78. [PMID: 34453619 PMCID: PMC8403122 DOI: 10.1007/s11306-021-01828-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 08/06/2021] [Indexed: 01/22/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is one of the most common causes of dementia in old people. Neuronal deficits such as loss of memory, language and problem-solving are severely compromised in affected patients. The molecular features of AD are Aβ deposits in plaques or in oligomeric structures and neurofibrillary tau tangles in brain. However, the challenge is that Aβ is only one piece of the puzzle, and recent findings continue to support the hypothesis that their presence is not sufficient to predict decline along the AD outcome. In this regard, metabolomic-based techniques are acquiring a growing interest for either the early diagnosis of diseases or the therapy monitoring. Mass spectrometry is one the most common analytical platforms used for detection, quantification, and characterization of metabolic biomarkers. In the past years, both targeted and untargeted strategies have been applied to identify possible interesting compounds. AIM OF REVIEW The overall goal of this review is to guide the reader through the most recent studies in which LC-MS-based metabolomics has been proposed as a powerful tool for the identification of new diagnostic biomarkers in AD. To this aim, herein studies spanning the period 2009-2020 have been reported. Advantages and disadvantages of targeted vs untargeted metabolomic approaches have been outlined and critically discussed.
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Affiliation(s)
- Pierluigi Reveglia
- Department of Clinical and Experimental Medicine, University of Foggia, 71122, Foggia, Italy
| | - Carmela Paolillo
- Department of Clinical and Experimental Medicine, University of Foggia, 71122, Foggia, Italy
| | - Gabriella Ferretti
- Department of Neuroscience, School of Medicine, University of Naples Federico II, 80131, Napoli, Italy
| | - Armando De Carlo
- Department of Clinical and Experimental Medicine, University of Foggia, 71122, Foggia, Italy
- Policlinico Riuniti University Hospital, 71122, Foggia, Italy
| | - Antonella Angiolillo
- Department of Medicine and Health Sciences, Center for Research and Training in Aging Medicine, University of Molise, 86100, Campobasso, Italy
| | - Rosarita Nasso
- Department of Neuroscience, School of Medicine, University of Naples Federico II, 80131, Napoli, Italy
| | - Mafalda Caputo
- Department of Molecular Medicine and Medical Biotechnology, School of Medicine, University of Naples Federico II, 80131, Napoli, Italy
| | - Carmela Matrone
- Department of Neuroscience, School of Medicine, University of Naples Federico II, 80131, Napoli, Italy
| | - Alfonso Di Costanzo
- Department of Medicine and Health Sciences, Center for Research and Training in Aging Medicine, University of Molise, 86100, Campobasso, Italy
| | - Gaetano Corso
- Department of Clinical and Experimental Medicine, University of Foggia, 71122, Foggia, Italy.
- Policlinico Riuniti University Hospital, 71122, Foggia, Italy.
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Garcia AA, Koperniku A, Ferreira JCB, Mochly-Rosen D. Treatment strategies for glucose-6-phosphate dehydrogenase deficiency: past and future perspectives. Trends Pharmacol Sci 2021; 42:829-844. [PMID: 34389161 DOI: 10.1016/j.tips.2021.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/19/2021] [Accepted: 07/13/2021] [Indexed: 01/20/2023]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) maintains redox balance in a variety of cell types and is essential for erythrocyte resistance to oxidative stress. G6PD deficiency, caused by mutations in the G6PD gene, is present in ~400 million people worldwide, and can cause acute hemolytic anemia. Currently, there are no therapeutics for G6PD deficiency. We discuss the role of G6PD in hemolytic and nonhemolytic disorders, treatment strategies attempted over the years, and potential reasons for their failure. We also discuss potential pharmacological pathways, including glutathione (GSH) metabolism, compensatory NADPH production routes, transcriptional upregulation of the G6PD gene, highlighting potential drug targets. The needs and opportunities described here may motivate the development of a therapeutic for hematological and other chronic diseases associated with G6PD deficiency.
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Affiliation(s)
- Adriana A Garcia
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA
| | - Ana Koperniku
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA
| | - Julio C B Ferreira
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA; Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Daria Mochly-Rosen
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA.
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31
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Kaufmann L, Moeller K, Marksteiner J. Pain and Associated Neuropsychiatric Symptoms in Patients Suffering from Dementia: Challenges at Different Levels and Proposal of a Conceptual Framework. J Alzheimers Dis 2021; 83:1003-1009. [PMID: 34366340 PMCID: PMC8543251 DOI: 10.3233/jad-210263] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Old age is critically associated with multi-morbidity, chronic pain, and high risk for dementia. Recognizing and treating pain is very much dependent on language comprehension and production. Both may be impaired in dementia. Moreover, neuropsychiatric symptoms may interact with pain perception. The main aims of the present article were 1) to identify key areas for future research to elucidate the relation between pain and associated neuropsychiatric symptoms in dementia, and 2) to provide a conceptual framework for ameliorating the clinical process of recognizing, assessing, and managing pain in non-communicating patients with advanced dementia.
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Affiliation(s)
- Liane Kaufmann
- Depatment of Psychology, University of Innsbruck, Austria.,Department of Psychiatry and Psychotherapy A, General Hospital Hall in Tirol, Austria
| | - Korbinian Moeller
- School of Science, Centre for Mathematical Cognition, Loughborough University, United Kingdom.,Leibniz-Institut fuer Wissensmedien, Tuebingen, Germany.,LEAD Graduate School & Research Network, University of Tuebingen, Germany
| | - Josef Marksteiner
- Department of Psychiatry and Psychotherapy A, General Hospital Hall in Tirol, Austria
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de Andrade Ramos G, Souza de Oliveira A, Bartolini M, Naldi M, Liparulo I, Bergamini C, Uliassi E, Wu L, Fraser PE, Abreu M, Kiametis AS, Gargano R, Silveira ER, Brand GD, Prchal L, Soukup O, Korábečný J, Bolognesi ML, Soares Romeiro LA. Discovery of sustainable drugs for Alzheimer's disease: cardanol-derived cholinesterase inhibitors with antioxidant and anti-amyloid properties. RSC Med Chem 2021; 12:1154-1163. [PMID: 34355181 PMCID: PMC8293282 DOI: 10.1039/d1md00046b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 03/29/2021] [Indexed: 01/21/2023] Open
Abstract
As part of our efforts to develop sustainable drugs for Alzheimer's disease (AD), we have been focusing on the inexpensive and largely available cashew nut shell liquid (CNSL) as a starting material for the identification of new acetylcholinesterase (AChE) inhibitors. Herein, we decided to investigate whether cardanol, a phenolic CNSL component, could serve as a scaffold for improved compounds with concomitant anti-amyloid and antioxidant activities. Ten new derivatives, carrying the intact phenolic function and an aminomethyl functionality, were synthesized and first tested for their inhibitory potencies towards AChE and butyrylcholinesterase (BChE). 5 and 11 were found to inhibit human BChE at a single-digit micromolar concentration. Transmission electron microscopy revealed the potential of five derivatives to modulate Aβ aggregation, including 5 and 11. In HORAC assays, 5 and 11 performed similarly to standard antioxidant ferulic acid as hydroxyl scavenging agents. Furthermore, in in vitro studies in neuronal cell cultures, 5 and 11 were found to effectively inhibit reactive oxygen species production at a 10 μM concentration. They also showed a favorable initial ADME/Tox profile. Overall, these results suggest that CNSL is a promising raw material for the development of potential disease-modifying treatments for AD.
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Affiliation(s)
- Giselle de Andrade Ramos
- Department of Pharmacy, Health Sciences Faculty, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Andressa Souza de Oliveira
- Department of Pharmacy, Health Sciences Faculty, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Manuela Bartolini
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Marina Naldi
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Irene Liparulo
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Christian Bergamini
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Elisa Uliassi
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Ling Wu
- Tanz Centre for Research in Neurodegenerative Diseases and Dept. of Medical Biophysics, University of Toronto Krembil Discovery Tower, 60 Leonard Avenue, 6KD-402 M5T 2S8 Toronto ON Canada
| | - Paul E Fraser
- Tanz Centre for Research in Neurodegenerative Diseases and Dept. of Medical Biophysics, University of Toronto Krembil Discovery Tower, 60 Leonard Avenue, 6KD-402 M5T 2S8 Toronto ON Canada
| | - Monica Abreu
- Physics Institute, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Alessandra Sofia Kiametis
- Physics Institute, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Ricardo Gargano
- Physics Institute, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Edilberto Rocha Silveira
- CENAUREMN, Department of Organic and Inorganic Chemistry, Federal University of Ceará 60021-970 Fortaleza CE Brazil
| | - Guilherme D Brand
- Chemistry Institute, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
| | - Lukas Prchal
- Biomedical Research Centre, University Hospital Hradec Kralove Sokolska 581, 500 05 Hradec Kralove Czech Republic
| | - Ondřej Soukup
- Biomedical Research Centre, University Hospital Hradec Kralove Sokolska 581, 500 05 Hradec Kralove Czech Republic
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence Trebesska 1575, 500 01 Hradec Kralove Czech Republic
| | - Jan Korábečný
- Biomedical Research Centre, University Hospital Hradec Kralove Sokolska 581, 500 05 Hradec Kralove Czech Republic
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence Trebesska 1575, 500 01 Hradec Kralove Czech Republic
| | - Maria Laura Bolognesi
- Department of Pharmacy and Biotechnology, University of Bologna Via Belmeloro 6 40126 Bologna Italy
| | - Luiz Antonio Soares Romeiro
- Department of Pharmacy, Health Sciences Faculty, University of Brasília, Campus Universitário Darcy Ribeiro 70910-900 Brasília DF Brazil
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Nutraceutical Supplementation Ameliorates Visual Function, Retinal Degeneration, and Redox Status in rd10 Mice. Antioxidants (Basel) 2021; 10:antiox10071033. [PMID: 34206804 PMCID: PMC8300708 DOI: 10.3390/antiox10071033] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/17/2022] Open
Abstract
Retinitis pigmentosa (RP) is a group of inherited retinal dystrophies characterized by progressive degeneration of photoreceptor cells. Ocular redox status is altered in RP suggesting oxidative stress could contribute to their progression. In this study, we investigated the effect of a mixture of nutraceuticals with antioxidant properties (NUT) on retinal degeneration in rd10 mice, a model of RP. NUT was orally administered to rd10 mice from postnatal day (PD) 9 to PD18. At PD18 retinal function and morphology were examined by electroretinography (ERG) and histology including TUNEL assay, immunolabeling of microglia, Müller cells, and poly ADP ribose polymers. Retinal redox status was determined by measuring the activity of antioxidant enzymes and some oxidative stress markers. Gene expression of the cytokines IL-6, TNFα, and IL-1β was assessed by real-time PCR. NUT treatment delayed the loss of photoreceptors in rd10 mice partially preserving their electrical responses to light stimuli. Moreover, it ameliorated redox status and reduced inflammation including microglia activation, upregulation of cytokines, reactive gliosis, and PARP overactivation. NUT ameliorated retinal functionality and morphology at early stages of RP in rd10 mice. This formulation could be useful as a neuroprotective approach for patients with RP in the future.
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Spectral characterization, antioxidant, antimicrobial, cytotoxic, and cyclooxygenase inhibitory activities of Aloysia citriodora essential oils collected from two Palestinian regions. BMC Complement Med Ther 2021; 21:143. [PMID: 34001110 PMCID: PMC8130314 DOI: 10.1186/s12906-021-03314-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 05/04/2021] [Indexed: 02/07/2023] Open
Abstract
Background Aloysia citriodora Palau (AC) is commonly known as Lemon Verbena and has been utilized as a medicinal tea in folkloric medicine for the treatment of abdominal spasm, anxiety, and fever. The present investigation aimed to identify the chemical ingredients of AC essential oil (EO) collected from two different locations in Palestine and to assess their antioxidant, antimicrobial, cytotoxic, and cyclooxygenase (COX) inhibitory effects. Methods Gas chromatography/mass spectroscopy (GC/MS) technique was used to identify the chemical components of the hydro-distilled EO from both regions, while DPPH, MTS, and COX assays were utilized to estimate the antioxidant, cytotoxic, and COX inhibitory activities of the EOs, respectively. Moreover, a broth microdilution assay was used to assess antimicrobial potentials against seven microbial strains. Results The GC/MS technique revealed the presence of 17 compounds from the AC collected from the Umm al-Fahm region and 13 compounds from the sample from the Baqa al-Gharbiyye region, while α-citral was the major component of both EOs, representing 47.62 and 43.46%, respectively. The Baqa al-Gharbiyye AC EO exerted more potent antioxidant activity than the Umm al-Fahm EO, with IC50 values of 11.74 ± 0.18 and 35.48 ± 0.14 μg/mL, respectively, while the positive control Trolox had antioxidant IC50 values of 2.45 ± 0.01 μg/mL. Interestingly, both EOs inhibited more potential activity against Methicillin-Resistant Staphylococcus aureus (MRSA) and Proteus vulgaris than Ciprofloxacin and Ampicillin antibiotics and also showed more potent antifungal activity against Candida albicans than Fluconazole. Moreover, the Baqa al-Gharbiyye AC EO had a more potent cytotoxic effect than the Umm al-Fahm EO, with IC50 values of 84.5 ± 0.24 and 33.31 ± 0.01 μg/mL, respectively, compared with Doxorubicin, which had an IC50 dose of 22.01 ± 1.4 μg/mL. The EOs from Baqa al-Gharbiyye showed potent activity against both COX-1 and COX-2 enzymes, with IC50 of 52.93 ± 0.13 and 89.31 ± 0.21 μg/mL, respectively, while the EOs from the Umm al-Fahm region showed weaker activity against these enzymes, with IC50 of 349.99 ± 0.33 and 1326.37 ± 1.13 μg/mL, respectively. Conclusion Both characterized EOs have a huge variety of chemical components. The Baqa al-Gharbiyye AC EO has more potent antioxidant and cytotoxic activities than the Umm al-Fahm EO, but both have potential antimicrobial activity against MRSA, P. vulgaris, and C. albicans. These results suggest the use of AC EOs as promising sources of active ingredients in the food, cosmetic, and pharmaceutical industries. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-021-03314-1.
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Noori T, Dehpour AR, Sureda A, Sobarzo-Sanchez E, Shirooie S. Role of natural products for the treatment of Alzheimer's disease. Eur J Pharmacol 2021; 898:173974. [PMID: 33652057 DOI: 10.1016/j.ejphar.2021.173974] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/09/2021] [Accepted: 02/19/2021] [Indexed: 12/19/2022]
Abstract
Negative psychological and physiological consequences of neurodegenerative disorders represent a high social and health cost. Among the neurodegenerative disorders Alzheimer's disease (AD) is recognized as a leading neurodegenerative condition and a primary cause of dementia in the elderlys. AD is considered as neurodegenerative disorder that progressively impairs cognitive function and memory. According to current epidemiological data, about 50 milLion people worldwide are suffering from AD. The primary symptoms of AD are almost inappreciable and usually comprise forgetfulness of recent events. Numerous processes are involved in the development of AD, for example oxidative stress (OS) mainly due to mitochondrial dysfunction, intracellular the accumulation of hyperphosphorylated tau (τ) proteins in the form of neurofibrillary tangles, excessive the accumulation of extracellular plaques of beta-amyloid (Aβ), genetic and environmental factors. Running treatments only attenuate symptoms and temporarily reduce the rate of cognitive progression associated with AD. This means that most treatments focus only on controlLing symptoms, particularly in the initial stages of the disease. In the past, the first choice of treatment was based on natural ingredients. In this sense, diverse natural products (NPs) are capable to decrease the symptoms and alleviate the development of several diseases including AD attracting the attention of the scientific community and the pharmaceutical industry. Specifically, numerous NPs including flavonoids, gingerols, tannins, anthocyanins, triterpenes and alkaloids have been shown anti-inflammatory, antioxidant, anti-amyloidogenic, and anti-choLinesterase properties. This review provide a summary of the pathogenesis and the therapeutic goals of AD. It also discusses the available data on various plants and isolated natural compounds used to prevent and diminish the symptoms of AD.
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Affiliation(s)
- Tayebeh Noori
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ahmad Reza Dehpour
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Experimental Medicine Research Center, TUMS, Tehran, Iran
| | - Antoni Sureda
- Research Group on Community Nutrition and Oxidative Stress (NUCOX), University Research Institute of Health Sciences (IUNICS), and Health Research Institute of Balearic Islands (IdISBa), University of Balearic Islands, Palma de Mallorca E-07122, Balearic Islands, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029, Madrid, Spain
| | - Eduardo Sobarzo-Sanchez
- Instituto de Investigación y Postgrado, Facultad de Ciencias de la Salud, Universidad Central de Chile, Santiago, Chile; Department of Organic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Spain
| | - Samira Shirooie
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Mišković J, Karaman M, Rašeta M, Krsmanović N, Berežni S, Jakovljević D, Piattoni F, Zambonelli A, Gargano ML, Venturella G. Comparison of Two Schizophyllum commune Strains in Production of Acetylcholinesterase Inhibitors and Antioxidants from Submerged Cultivation. J Fungi (Basel) 2021; 7:jof7020115. [PMID: 33557141 PMCID: PMC7913866 DOI: 10.3390/jof7020115] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 12/03/2022] Open
Abstract
In recent years, fungi have been recognized as producers of acetylcholinesterase (AChE) inhibitors, agents important for the prevention of Alzheimer’s disease (AD). This study aimed to examine the AChE inhibitory, the antioxidative and antibacterial activity of two different Schizophyllum commune strains that originated from Serbia (SRB) and Italy (IT). Submerged cultivation of grown mycelia (M) and fermentation broth (F) of ethanol (EtOH) and polysaccharide (PSH) extracts lasted for 7, 14, 21 and 28 days. For AChE activity Ellman method was performed, while for antioxidative activity, sevendifferent assays were conducted: DPPH, ABTS, FRAP, SOA, OH, NO together with total phenolic content. Antimicrobial screen, LC–MS/MS technique and FTIR measurements were performed. Different isolates exhibited different AChE activity, with PSH being the strongest (SRB, M, 28 days IC90 79.73 ± 26.34 µg/mL), while in EtOH extracts, IT stood out (F, 14 days, IC50 0.8 ± 0.6 µg/mL). PSH extracts (7 days) exhibit significant antioxidative activity (AO), opposite to EtOH extracts where 14 and 21days periods stood out. Only tw extracts showed antibacterial activity. Following LC–MS/MS analysis p-hydroxybenzoic and gallic acids were the most abundant phenolics. PSH extracts demonstrated remarkable results, making this study debut and introducing S. commune as a valuable resource of AChE inhibitors.
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Affiliation(s)
- Jovana Mišković
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, TrgDositejaObradovića 2, 21000 Novi Sad, Serbia; (J.M.); (N.K.)
| | - Maja Karaman
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, TrgDositejaObradovića 2, 21000 Novi Sad, Serbia; (J.M.); (N.K.)
- Correspondence:
| | - Milena Rašeta
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; (M.R.); (S.B.)
| | - Nenad Krsmanović
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, TrgDositejaObradovića 2, 21000 Novi Sad, Serbia; (J.M.); (N.K.)
| | - Sanja Berežni
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; (M.R.); (S.B.)
| | - Dragica Jakovljević
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia;
| | - Federica Piattoni
- Laboratory of Genetics & Genomics of Marine Resources and Environment (GenoDream), Department Biological, Geological & Environmental Sciences (BiGeA), University of Bologna, Via S. Alberto 163, 48123 Ravenna, Italy;
| | - Alessandra Zambonelli
- Dipartimento di Scienze e Tecnologie Agroalimentari, University of Bologna, Via Fanin 46, 40127 Bologna, Italy;
| | - Maria Letizia Gargano
- Department of Agricultural and Environmental Science, University of Bari “Aldo Moro”, Via Amendola 165/A, I-70126 Bari, Italy;
| | - Giuseppe Venturella
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Via delle Scienze, Bldg. 4, 90128 Palermo, Italy;
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Abstract
In this mini-reflection, I explain how during my doctoral work in a Botany Department I first became interested in H2O2 and later in my career in other reactive oxygen species, especially the role of "catalytic" iron and haem compounds (including leghaemoglobin) in promoting oxidative damage. The important roles that H2O2, other ROS and dietary plants play in respect to humans are discussed. I also review the roles of diet-derived antioxidants in relation to human disease, presenting reasons why clinical trials using high doses of natural antioxidants have generally given disappointing results. Iron chelators and ergothioneine are reviewed as potential cytoprotective agents with antioxidant properties that may be useful therapeutically. The discovery of ferroptosis may also lead to novel agents that can be used to treat certain diseases.
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Affiliation(s)
- Barry Halliwell
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Centre for Life Sciences, #05-01A, 28 Medical Drive, 117456, Singapore.
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Lipid Peroxidation and Antioxidant Supplementation in Neurodegenerative Diseases: A Review of Human Studies. Antioxidants (Basel) 2020; 9:antiox9111128. [PMID: 33202952 PMCID: PMC7696060 DOI: 10.3390/antiox9111128] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 02/05/2023] Open
Abstract
Being characterized by progressive and severe damage in neuronal cells, neurodegenerative diseases (NDDs) are the major cause of disability and morbidity in the elderly, imposing a significant economic and social burden. As major components of the central nervous system, lipids play important roles in neural health and pathology. Disturbed lipid metabolism, particularly lipid peroxidation (LPO), is associated with the development of many NDDs, including Alzheimer’s disease (AD), Parkinson’s disease (PD), and amyotrophic lateral sclerosis (ALS), all of which show elevated levels of LPO products and LPO-modified proteins. Thus, the inhibition of neuronal oxidation might slow the progression and reduce the severity of NDD; natural antioxidants, such as polyphenols and antioxidant vitamins, seem to be the most promising agents. Here, we summarize current literature data that were derived from human studies on the effect of natural polyphenols and vitamins A, C, and E supplementation in patients with AD, PD, and ALS. Although these compounds may reduce the severity and slow the progression of NDD, research gaps remain in antioxidants supplementation in AD, PD, and ALS patients, which indicates that further human studies applying antioxidant supplementation in different forms of NDDs are urgently needed.
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