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Ozcicek I, Baydas G, Erim UC, Ustundag UV. Quercetin/polyethyleneimine modified gold nanoconjugates inhibit apoptosis and ROS production induced by hydrogen peroxide in DRG sensory neurons. J Pharm Sci 2024:S0022-3549(24)00310-1. [PMID: 39151794 DOI: 10.1016/j.xphs.2024.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/12/2024] [Accepted: 08/12/2024] [Indexed: 08/19/2024]
Abstract
The basis of most neurological syndromes is the accumulation of free radical molecules. Quercetin is a polyphenolic bioflavonoid molecule and it has a very strong antioxidant effect by maintaining oxidative balance. There are many difficulties in the clinical use of quercetin due to its hydrophobic structure, low solubility, instability, poor oral bioavailability, and limited tissue-barrier penetration. Its synergistic use in complex with gold nanoparticles (AuNPs) could overcome these problems. AuNPs have recently emerged as an attractive candidate for delivery applications of various biomolecules and drugs. The aim of this study was to synthesize two different sized gold nanoparticles (AuNP20 and AuNP50) modified with polyethyleneimine (PEI) and quercetin, evaluate their potential neuroprotective effects on the in vitro oxidative stress model using DRG primary sensory neurons. It was shown that the antioxidant and anti-apoptotic ability of the bioflavonoid was preserved after exposure to the designed quercetin modified AuNPs. The PEI surface coating increased the stability and biocompatibility of the AuNPs in both sizes. It also potentially enables additional surface functionalization. This study indicates that designed nanoparticles (AuNP-Q-PEI) with different sizes could be a useful potential platform for the treatment of neurodegenerative syndromes or cancer diseases.
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Affiliation(s)
- Ilyas Ozcicek
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey; Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey.
| | - Gulsena Baydas
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey; Department of Physiology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey; Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
| | - Umit Can Erim
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey; Department of Analytical Chemistry, School of Pharmacy, Istanbul Medipol University, Istanbul, Turkey
| | - Unsal Veli Ustundag
- Department of Basic Medical Scinces, Faculty of Dentistry, Istanbul Atlas University, Istanbul, Turkey
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de Assis ALC, de Araújo Rodrigues P, de Morais SM, Rodrigues ALM, Gomes JMP, de Souza Nascimento T, Oliveira AV, de Aguiar MSS, de Andrade GM. Byrsonima sericea Ethanol Extract Protected PC12 Cells from the Oxidative Stress and Apoptosis Induced by 6-Hydroxydopamine. Neurochem Res 2024; 49:234-244. [PMID: 37725292 DOI: 10.1007/s11064-023-04028-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/06/2023] [Accepted: 09/08/2023] [Indexed: 09/21/2023]
Abstract
Parkinson's disease is characterized by the progressive loss of dopaminergic neurons in the nigrostriatal pathway and oxidative stress is one of the main mechanisms that lead to neuronal death in this disease. Previous studies have shown antioxidant activity from the leaves of Byrsonima sericea, a plant of the Malpighiaceae family. This study aimed to evaluate the cytoprotective activity of the B. sericea ethanolic extract (BSEE) against the cytotoxicity induced by 6-hydroxydopamine (6-OHDA) in PC12 cells, an in vitro model of parkinsonism. The identification of phenolic compounds in the extract by HPLC-DAD revealed the presence of geraniin, rutin, isoquercetin, kaempferol 3-O-β-rutinoside, and quercetin. The BSEE (75-300 µg/mL) protected PC12 cells from toxicity induced by 6-OHDA (25 µg/mL), protected cell membrane integrity and showed antioxidant activity. BSEE was able to decrease nitrite levels, glutathione depletion, and protect cells from 6-OHDA-induced apoptosis. Thus, we suggest that the BSEE can be explored as a possible cytoprotective agent for Parkinson's disease due to its high antioxidant capacity and anti-apoptotic action.
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Affiliation(s)
- Albert Layo Costa de Assis
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Rua Professor Costa Mendes, 1608, Fortaleza, CE, 60.430-140, Brazil
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil
| | - Patricia de Araújo Rodrigues
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1127, Fortaleza, CE, 60.430-275, Brazil
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil
| | - Selene Maia de Morais
- Natural Product Chemistry Laboratory, State University of Ceará - NUPESA, Avenida Dr. Silas Munguba, 1700 - Itaperi, Fortaleza, CE, 60714-903, Brazil
| | - Ana Livya Moreira Rodrigues
- Natural Product Chemistry Laboratory, State University of Ceará - NUPESA, Avenida Dr. Silas Munguba, 1700 - Itaperi, Fortaleza, CE, 60714-903, Brazil
| | - Jessica Maria Pessoa Gomes
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Rua Professor Costa Mendes, 1608, Fortaleza, CE, 60.430-140, Brazil
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil
| | - Tyciane de Souza Nascimento
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Rua Professor Costa Mendes, 1608, Fortaleza, CE, 60.430-140, Brazil
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil
| | - Alfaete Vieira Oliveira
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1127, Fortaleza, CE, 60.430-275, Brazil
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil
| | - Mayara Sandrielly Soares de Aguiar
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Rua Professor Costa Mendes, 1608, Fortaleza, CE, 60.430-140, Brazil.
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil.
| | - Geanne Matos de Andrade
- Department of Clinical Medicine, Faculty of Medicine, Federal University of Ceará, Rua Professor Costa Mendes, 1608, Fortaleza, CE, 60.430-140, Brazil.
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1127, Fortaleza, CE, 60.430-275, Brazil.
- Neuroscience and Behavior Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Rua Coronel Nunes de Melo, 1000, Fortaleza, CE, 60.430-275, Brazil.
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Phukan BC, Roy R, Gahatraj I, Bhattacharya P, Borah A. Therapeutic considerations of bioactive compounds in Alzheimer's disease and Parkinson's disease: Dissecting the molecular pathways. Phytother Res 2023; 37:5657-5699. [PMID: 37823581 DOI: 10.1002/ptr.8012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 10/13/2023]
Abstract
Leading neurodegenerative diseases Alzheimer's disease (AD) and Parkinson's disease (PD) are characterized by the impairment of memory and motor functions, respectively. Despite several breakthroughs, there exists a lack of disease-modifying treatment strategies for these diseases, as the available drugs provide symptomatic relief and bring along side effects. Bioactive compounds are reported to bear neuroprotective properties with minimal toxicity, however, a detailed elucidation of their modes of neuroprotection is lacking. The review elucidates the neuroprotective mechanism(s) of some of the major phyto-compounds in pre-clinical and clinical studies of AD and PD to understand their potential in combating these diseases. Curcumin, eugenol, resveratrol, baicalein, sesamol and so on have proved efficient in countering the pathological hallmarks of AD and PD. Curcumin, resveratrol, caffeine and so on have reached the clinical phases of these diseases, while aromadendrin, delphinidin, cyanidin and xanthohumol are yet to be extensively explored in pre-clinical phases. The review highlights the need for extensive investigation of these compounds in the clinical stages of these diseases so as to utilize their disease-modifying abilities in the real field of treatment. Moreover, poor pharmacokinetic properties of natural compounds are constraints to their therapeutic yields and this review suggests a plausible contribution of nanotechnology in overcoming these limitations.
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Affiliation(s)
| | - Rubina Roy
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
| | - Indira Gahatraj
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
| | - Pallab Bhattacharya
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Gandhinagar, Gujarat, India
| | - Anupom Borah
- Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India
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Zhang W, Dong X, Huang R. Antiparkinsonian Effects of Polyphenols: A Narrative Review with a Focus on the Modulation of the Gut-brain Axis. Pharmacol Res 2023:106787. [PMID: 37224894 DOI: 10.1016/j.phrs.2023.106787] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/23/2023] [Accepted: 05/02/2023] [Indexed: 05/26/2023]
Abstract
Polyphenols, which are naturally occurring bioactive compounds in fruits and vegetables, are emerging as potential therapeutics for neurological disorders such as Parkinson's disease (PD). Polyphenols have diverse biological activities, such as anti-oxidative, anti-inflammatory, anti-apoptotic, and α-synuclein aggregation inhibitory effects, which could ameliorate PD pathogenesis. Studies have shown that polyphenols are capable of regulating the gut microbiota (GM) and its metabolites; in turn, polyphenols are extensively metabolized by the GM, resulting in the generation of bioactive secondary metabolites. These metabolites may regulate various physiological processes, including inflammatory responses, energy metabolism, intercellular communication, and host immunity. With increasing recognition of the importance of the microbiota-gut-brain axis (MGBA) in PD etiology, polyphenols have attracted growing attention as MGBA regulators. In order to address the potential therapeutic role of polyphenolic compounds in PD, we focused on MGBA. DATA AVAILABILITY: Data will be made available on request.
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Affiliation(s)
- Wei Zhang
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning PR, China
| | - Xiaoyu Dong
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning PR, China
| | - Rui Huang
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning PR, China.
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Bellavite P. Neuroprotective Potentials of Flavonoids: Experimental Studies and Mechanisms of Action. Antioxidants (Basel) 2023; 12:antiox12020280. [PMID: 36829840 PMCID: PMC9951959 DOI: 10.3390/antiox12020280] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
Neurological and neurodegenerative diseases, particularly those related to aging, are on the rise, but drug therapies are rarely curative. Functional disorders and the organic degeneration of nervous tissue often have complex causes, in which phenomena of oxidative stress, inflammation and cytotoxicity are intertwined. For these reasons, the search for natural substances that can slow down or counteract these pathologies has increased rapidly over the last two decades. In this paper, studies on the neuroprotective effects of flavonoids (especially the two most widely used, hesperidin and quercetin) on animal models of depression, neurotoxicity, Alzheimer's disease (AD) and Parkinson's disease are reviewed. The literature on these topics amounts to a few hundred publications on in vitro and in vivo models (notably in rodents) and provides us with a very detailed picture of the action mechanisms and targets of these substances. These include the decrease in enzymes that produce reactive oxygen and ferroptosis, the inhibition of mono-amine oxidases, the stimulation of the Nrf2/ARE system, the induction of brain-derived neurotrophic factor production and, in the case of AD, the prevention of amyloid-beta aggregation. The inhibition of neuroinflammatory processes has been documented as a decrease in cytokine formation (mainly TNF-alpha and IL-1beta) by microglia and astrocytes, by modulating a number of regulatory proteins such as Nf-kB and NLRP3/inflammasome. Although clinical trials on humans are still scarce, preclinical studies allow us to consider hesperidin, quercetin, and other flavonoids as very interesting and safe dietary molecules to be further investigated as complementary treatments in order to prevent neurodegenerative diseases or to moderate their deleterious effects.
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Acıkara OB, Karatoprak GŞ, Yücel Ç, Akkol EK, Sobarzo-Sánchez E, Khayatkashani M, Kamal MA, Kashani HRK. A Critical Analysis of Quercetin as the Attractive Target for the Treatment of Parkinson's Disease. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2022; 21:795-817. [PMID: 34872486 DOI: 10.2174/1871527320666211206122407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/01/2021] [Accepted: 09/28/2021] [Indexed: 02/08/2023]
Abstract
Parkinson's Disease (PD) is a multifaceted disorder with various factors suggested to play a synergistic pathophysiological role, such as oxidative stress, autophagy, pro-inflammatory events, and neurotransmitter abnormalities. While it is crucial to discover new treatments in addition to preventing PD, recent studies have focused on determining whether nutraceuticals will exert neuroprotective actions and pharmacological functions in PD. Quercetin, a flavonol-type flavonoid, is found in many fruits and vegetables and is recognised as a complementary therapy for PD. The neuroprotective effect of quercetin is directly associated with its antioxidant activity, in addition to stimulating cellular defence against oxidative stress. Other related mechanisms are activating Sirtuins (SIRT1) and inducing autophagy, in addition to induction of Nrf2-ARE and Paraoxonase 2 (PON2). Quercetin, whose neuroprotective activity has been demonstrated in many studies, unfortunately, has a disadvantage because of its poor water solubility, chemical instability, and low oral bioavailability. It has been reported that the disadvantages of quercetin have been eliminated with nanocarriers loaded with quercetin. The role of nanotechnology and nanodelivery systems in reducing oxidative stress during PD provides an indisputable advantage. Accordingly, the present review aims to shed light on quercetin's beneficial effects and underlying mechanisms in neuroprotection. In addition, the contribution of nanodelivery systems to the neuroprotective effect of quercetin is also discussed.
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Affiliation(s)
- Ozlem Bahadır Acıkara
- Department of Pharmacognosy, Faculty of Pharmacy, Ankara University, Tandoğan, 06100 Ankara, Turkey
| | - Gökçe Şeker Karatoprak
- Department of Pharmacognosy, Faculty of Pharmacy, Erciyes University, 38039, Kayseri, Turkey
| | - Çiğdem Yücel
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Erciyes University, 38039, Kayseri, Turkey
| | - Esra Küpeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler 06330, Ankara, Turkey
| | - Eduardo Sobarzo-Sánchez
- Instituto de Investigación y Postgrado, Facultad de Ciencias de la Salud, Universidad Central de Chile, 8330507, Santiago, Chile.,Department of Organic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | | | - Mohammad Amjad Kamal
- Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China.,King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, Bangladesh.,Enzymoics, Novel Global Community Educational Foundation, Sydney, Australia
| | - Hamid Reza Khayat Kashani
- Department of Neurosurgery, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Zhang L, Ma J, Yang F, Li S, Ma W, Chang X, Yang L. Neuroprotective Effects of Quercetin on Ischemic Stroke: A Literature Review. Front Pharmacol 2022; 13:854249. [PMID: 35662707 PMCID: PMC9158527 DOI: 10.3389/fphar.2022.854249] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/28/2022] [Indexed: 12/15/2022] Open
Abstract
Ischemic stroke (IS) is characterized by high recurrence and disability; however, its therapies are very limited. As one of the effective methods of treating acute attacks of IS, intravenous thrombolysis has a clear time window. Quercetin, a flavonoid widely found in vegetables and fruits, inhibits immune cells from secreting inflammatory cytokines, thereby reducing platelet aggregation and limiting inflammatory thrombosis. In pre-clinical studies, it has been shown to exhibit neuroprotective effects in patients with ischemic brain injury. However, its specific mechanism of action remains unknown. Therefore, this review aims to use published data to elucidate the potential value of quercetin in patients with ischemic brain injury. This article also reviews the plant sources, pharmacological effects, and metabolic processes of quercetin in vivo, thus focusing on its mechanism in inhibiting immune cell activation and inflammatory thrombosis as well as promoting neuroprotection against ischemic brain injury.
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Affiliation(s)
- Leilei Zhang
- Xi'an Hospital of Traditional Chinese Medicine, Xi'an, China
| | - Jingying Ma
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Fan Yang
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Sishi Li
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Wangran Ma
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Xiang Chang
- Xi'an Hospital of Traditional Chinese Medicine, Xi'an, China
| | - Lin Yang
- Xi'an Hospital of Traditional Chinese Medicine, Xi'an, China
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Kara SP, Altunan B, Unal A. Investigation of the peripheral inflammation (neutrophil-lymphocyte ratio) in two neurodegenerative diseases of the central nervous system. Neurol Sci 2022; 43:1799-1807. [PMID: 34331157 PMCID: PMC8324446 DOI: 10.1007/s10072-021-05507-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/18/2021] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Alzheimer's disease (AD), and idiopathic Parkinson's disease (IPD) are the neurodegenerative diseases of the central nervous system (CNS). Cognitive impairment is on the forefront in AD. However, IPD is a movement disorder. Inflammation was suggested to have an effect in the pathophysiology of these two diseases. Neutrophil-lymphocyte ratio (NLR) was shown to be a possible marker showing the peripheral inflammation. We aimed to investigate the NLR of patiens with the diagnosis of AD, and IPD, and individuals with no neurodegenerative disease. MATERIALS AND METHODS A total of 100 patients with the diagnosis of IPD, and 94 with diagnosis of AD, and 61 healthy controls were included into the study. All the demographic, clinical, and laboratory data were retrospectively obtained from the hospital automated database system. RESULTS The NLR in the IPD group was found statistically significantly higher compared with the control group and the AD group (p < 0.001, p = 0.04, respectively). The age-adjusted values were statistically analyzed because of age difference. No statistically significant difference was detected between AD and control groups in terms of NLR (p = 0.6). The age-adjusted NLR value in the Parkinson's group was found significantly higher compared to the control group (p = 0.02) and Alzheimer's group (p = 0.03). DISCUSSION Chronic inflammation has an important role in the emergence and progression of the chronic neurodegenerative diseases of the CNS. Our results show that the inflammation in the peripheral blood in IPD was more significant compared with the inflammation in AD.
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Affiliation(s)
- Sonat Pınar Kara
- Faculty of Medicine, Department of Internal Medicine, Tekirdag Namık Kemal University, Tekirdag, Turkey
| | - Bengü Altunan
- Faculty of Medicine, Department of Neurology, Tekirdag Namik Kemal University, Tekirdag, Turkey
| | - Aysun Unal
- Faculty of Medicine, Department of Neurology, Tekirdag Namik Kemal University, Tekirdag, Turkey
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Zhang C, Jiang D, Wang J, Qi Q. The effects of TPT and dietary quercetin on growth, hepatic oxidative damage and apoptosis in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 224:112697. [PMID: 34450426 DOI: 10.1016/j.ecoenv.2021.112697] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
The objective of this study was to determine the effects of triphenyltin (TPT) and dietary quercetin on the growth, oxidative stress and apoptosis in zebrafish. A total of 240 fish were divided into 4 groups with three replicates as follows: fish were fed with the basal diet as the control group (D1), only 10 ng/L TPT (D2), 10 ng/L TPT + 100 mg/kg quercetin (D3), and only 100 mg/Kg quercetin as the D4 group. At the end of the study period (56 d), the results showed that the growth performance of the fish that were fed 100 mg/kg quercetin was significantly higher than that of fish that were exposed to 10 ng/L TPT. Quercetin ameliorated oxidative stress, which decreased malondialdehyde (MDA) and nitric oxide (NO) levels and improved antioxidant enzyme activities. The mRNA expressions of the key apoptotic gene and pro-inflammatory cytokines were significantly induced by TPT exposure. However, dietary quercetin prevented a marked increase in the Bax, caspase3 and caspase9 transcript abundances that were induced by TPT. In addition, the quercetin treatments decreased inflammation by regulating the NF-kB signalling pathway. In conclusion, our findings suggested that TPT induced oxidative stress and apoptosis in zebrafish and that the pretreatment with quercetin showed an ameliorative role. Dietary 100 mg/ kg quercetin helps to prevent oxidative damage, apoptosis and inflammation in TPT treated zebrafish.
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Affiliation(s)
- Chunnuan Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
| | - Dongxue Jiang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - Junhui Wang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - Qian Qi
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
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Bhat IUH, Bhat R. Quercetin: A Bioactive Compound Imparting Cardiovascular and Neuroprotective Benefits: Scope for Exploring Fresh Produce, Their Wastes, and By-Products. BIOLOGY 2021; 10:586. [PMID: 34206761 PMCID: PMC8301140 DOI: 10.3390/biology10070586] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/16/2022]
Abstract
Quercetin, a bioactive secondary metabolite, holds incredible importance in terms of bioactivities, which has been proved by in vivo and in vitro studies. The treatment of cardiovascular and neurological diseases by quercetin has been extensively investigated over the past decade. Quercetin is present naturally in appreciable amounts in fresh produce (fruits and vegetables). However, today, corresponding to the growing population and global demand for fresh fruits and vegetables, a paradigm shift and focus is laid towards exploring industrial food wastes and/or byproducts as a new resource to obtain bioactive compounds such as quercetin. Based on the available research reports over the last decade, quercetin has been suggested as a reliable therapeutic candidate for either treating or alleviating health issues, mainly those of cardiovascular and neurological diseases. In the present review, we have summarized some of the critical findings and hypotheses of quercetin from the available databases foreseeing its future use as a potential therapeutic agent to treat cardiovascular and neurological diseases. It is anticipated that this review will be a potential reference material for future research activities to be undertaken on quercetin obtained from fresh produce as well as their respective processing wastes/byproducts that rely on the circular concept.
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Affiliation(s)
- Irshad Ul Haq Bhat
- ERA-Chair for Food (By-) Products Valorisation Technologies (VALORTECH), Estonian University of Life Sciences, 51006 Tartu, Estonia;
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Zhu S, Choudhury NR, Rooney S, Pham NT, Koszela J, Kelly D, Spanos C, Rappsilber J, Auer M, Michlewski G. RNA pull-down confocal nanoscanning (RP-CONA) detects quercetin as pri-miR-7/HuR interaction inhibitor that decreases α-synuclein levels. Nucleic Acids Res 2021; 49:6456-6473. [PMID: 34107032 PMCID: PMC8216281 DOI: 10.1093/nar/gkab484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 05/11/2021] [Accepted: 05/21/2021] [Indexed: 12/18/2022] Open
Abstract
RNA-protein interactions are central to all gene expression processes and contribute to a variety of human diseases. Therapeutic approaches targeting RNA-protein interactions have shown promising effects on some diseases that are previously regarded as 'incurable'. Here, we developed a fluorescent on-bead screening platform, RNA Pull-Down COnfocal NAnoscanning (RP-CONA), to identify RNA-protein interaction modulators in eukaryotic cell extracts. Using RP-CONA, we identified small molecules that disrupt the interaction between HuR, an inhibitor of brain-enriched miR-7 biogenesis, and the conserved terminal loop of pri-miR-7-1. Importantly, miR-7's primary target is an mRNA of α-synuclein, which contributes to the aetiology of Parkinson's disease. Our method identified a natural product quercetin as a molecule able to upregulate cellular miR-7 levels and downregulate the expression of α-synuclein. This opens up new therapeutic avenues towards treatment of Parkinson's disease as well as provides a novel methodology to search for modulators of RNA-protein interaction.
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Affiliation(s)
- Siran Zhu
- Infection Medicine, University of Edinburgh, The Chancellor’s Building, Edinburgh EH16 4SB, UK
- Dioscuri Centre for RNA-Protein Interactions in Human Health and Disease, International Institute of Molecular and Cell Biology in Warsaw, Warsaw 02-109, Poland
| | - Nila Roy Choudhury
- Infection Medicine, University of Edinburgh, The Chancellor’s Building, Edinburgh EH16 4SB, UK
| | - Saul Rooney
- Infection Medicine, University of Edinburgh, The Chancellor’s Building, Edinburgh EH16 4SB, UK
| | - Nhan T Pham
- School of Biological Sciences, IQB3, University of Edinburgh, Edinburgh EH9 9FF, UK
| | - Joanna Koszela
- School of Biological Sciences, IQB3, University of Edinburgh, Edinburgh EH9 9FF, UK
| | - David Kelly
- The Wellcome Centre for Cell Biology, University of Edinburgh, Michael Swann Building, Max Born Crescent, Edinburgh EH9 3BF, UK
| | - Christos Spanos
- The Wellcome Centre for Cell Biology, University of Edinburgh, Michael Swann Building, Max Born Crescent, Edinburgh EH9 3BF, UK
| | - Juri Rappsilber
- The Wellcome Centre for Cell Biology, University of Edinburgh, Michael Swann Building, Max Born Crescent, Edinburgh EH9 3BF, UK
- Department of Biotechnology, Technische Universität Berlin, Berlin 13355, Germany
| | - Manfred Auer
- School of Biological Sciences, IQB3, University of Edinburgh, Edinburgh EH9 9FF, UK
| | - Gracjan Michlewski
- Dioscuri Centre for RNA-Protein Interactions in Human Health and Disease, International Institute of Molecular and Cell Biology in Warsaw, Warsaw 02-109, Poland
- Infection Medicine, University of Edinburgh, The Chancellor’s Building, Edinburgh EH16 4SB, UK
- Zhejiang University-University of Edinburgh Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang 314400, P.R. China
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12
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Noor N, Gani A, Gani A, Shah A, Ashraf ZU. Exploitation of polyphenols and proteins using nanoencapsulation for anti-viral and brain boosting properties - Evoking a synergistic strategy to combat COVID-19 pandemic. Int J Biol Macromol 2021; 180:375-384. [PMID: 33716131 PMCID: PMC7946821 DOI: 10.1016/j.ijbiomac.2021.03.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/31/2021] [Accepted: 03/04/2021] [Indexed: 12/16/2022]
Abstract
The world is currently under the threat of COVID pandemic and has focused every dimension of research in finding a cure to this novel disease. In this current situation, people are facing mental stress, agony, fear, depression and other associated symptoms which are taking a toll on their overall mental health. Nanoencapsulation of certain brain boosting polyphenols including quercetin, caffeine, cocoa flavanols and proteins like lectins can become new area of interest in the present scenario. Besides the brain boosting benefits, we have also highlighted the anti- viral activities of these compounds which we assume can play a possible role in combating COVID-19 given to their previous history of action against certain viruses. This review outlines the nanoencapsulation approaches of such synergistic compounds as a novel strategy to take the ongoing research a step ahead and also provides a new insight in bringing the role of nanotechnology in addressing the issues related to COVID pandemic.
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Affiliation(s)
- Nairah Noor
- Laboratory of Functional Food and Nutraceuticals, Department of Food Science and Technology, University of Kashmir, Srinagar 190006, India
| | - Adil Gani
- Laboratory of Functional Food and Nutraceuticals, Department of Food Science and Technology, University of Kashmir, Srinagar 190006, India; Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901, United States.
| | - Asir Gani
- Laboratory of Functional Food and Nutraceuticals, Department of Food Science and Technology, University of Kashmir, Srinagar 190006, India
| | - Asima Shah
- Laboratory of Functional Food and Nutraceuticals, Department of Food Science and Technology, University of Kashmir, Srinagar 190006, India
| | - Zanoor Ul Ashraf
- Laboratory of Functional Food and Nutraceuticals, Department of Food Science and Technology, University of Kashmir, Srinagar 190006, India
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13
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Tamtaji OR, Hadinezhad T, Fallah M, Shahmirzadi AR, Taghizadeh M, Behnam M, Asemi Z. The Therapeutic Potential of Quercetin in Parkinson's Disease: Insights into its Molecular and Cellular Regulation. Curr Drug Targets 2021; 21:509-518. [PMID: 31721700 DOI: 10.2174/1389450120666191112155654] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 09/30/2019] [Accepted: 10/08/2019] [Indexed: 12/13/2022]
Abstract
Parkinson's disease (PD) is a chronic and progressive neurodegenerative disorder characterized by the progressive death of dopaminergic neurons in the substantia nigra pars compacta (SNc). PD is a multifactorial disorder, with several different factors being suggested to play a synergistic pathophysiological role, including oxidative stress, autophagy, underlying pro-inflammatory events and neurotransmitters abnormalities. Overall, PD can be viewed as the product of a complex interaction of environmental factors acting on a given genetic background. The importance of this subject has gained more attention to discover novel therapies to prevent as well as treat PD. According to previous research, drugs used to treat PD have indicated significant limitations. Therefore, the role of flavonoids has been extensively studied in PD treatment. Quercetin, a plant flavonol from the flavonoid group, has been considered as a supplemental therapy for PD. Quercetin has pharmacological functions in PD by controlling different molecular pathways. Although few studies intended to evaluate the basis for the use of quercetin in the context of PD have been conducted so far, at present, there is very little evidence available addressing the underlying mechanisms of action. Various principal aspects of these treatment procedures remain unknown. Here, currently existing knowledge supporting the use of quercetin for the clinical management of PD has been reviewed.
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Affiliation(s)
- Omid Reza Tamtaji
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Tooba Hadinezhad
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Maryam Fallah
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | | | - Mohsen Taghizadeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | | | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
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14
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Henríquez G, Gomez A, Guerrero E, Narayan M. Potential Role of Natural Polyphenols against Protein Aggregation Toxicity: In Vitro, In Vivo, and Clinical Studies. ACS Chem Neurosci 2020; 11:2915-2934. [PMID: 32822152 DOI: 10.1021/acschemneuro.0c00381] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
One of the main features of neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease is the amyloidogenic behavior of disease-specific proteins including amyloid β, tau, α-synuclein, and mutant Huntingtin which participate in the formation, accumulation, and deposition of toxic misfolded aggregates. Consequently, these proteins not only associated with the progress of their respective neurodegenerative pathologies but also qualify as disease-specific biomarkers. The aim of using natural polyphenols is to target amyloid-dependent proteopathies by decreasing free radical damage and inhibiting and dissolving amyloid fibrils. We explore the effectiveness of the polyphenols epigallocatechin-3-gallate, oleuropein aglycone, and quercetin on their ability to inhibit aggregation of amyloid β, tau, and α-synuclein and mitigate other pathological features for Alzheimer's disease and Parkinson's disease. The analysis was carried from in vitro and cell line studies to animal models and clinical trials. This Review describes the use of phytochemical compounds as prophylactic agents for Alzheimer's disease, Parkinson's disease, and other proteopathies.
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Affiliation(s)
- Gabriela Henríquez
- Department of Environmental Science and Engineering, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Alejandra Gomez
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Erick Guerrero
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Mahesh Narayan
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
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15
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Zhang JL, Liu M, Cui W, Yang L, Zhang CN. Quercetin affects shoaling and anxiety behaviors in zebrafish: Involvement of neuroinflammation and neuron apoptosis. FISH & SHELLFISH IMMUNOLOGY 2020; 105:359-368. [PMID: 32693159 DOI: 10.1016/j.fsi.2020.06.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 06/14/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Quercetin, a potential fish food supplement, has been reported to process many beneficial properties. However, some negative effects of quercetin have been observed, which pointed out necessity for additional studies to evaluate its safety. Therefore, the present study investigated effects of quercetin (0.01, 0.1, 1, 10, 100 and 1000 μg/L) on shoaling and anxiety behaviors through novel tank tests in zebrafish (Danio rerio). Furthermore, oxidative stress, neuroinflammation and apoptosis in the brains were examined to learn more about mechanisms of action related to quercetin. The results showed that quercetin at the lower concentrations exerted beneficial effects on shoaling and anxiety behaviors. On the contrary, when quercetin was up to 1000 μg/L, it exerted detrimental effects shown as decreases of movement and increases of anxiety behaviors. Generally, U-shaped responses of antioxidant enzyme activities (superoxide dismutase and catalase), and inversed U-shaped responses of inflammatory mediators (cyclooxygenase-2) and cytokines (interleukin-1β, interleukin-6, interleukin-10, and tumor necrosis factor α) to quercetin treatment were found in the brains. In addition, quercetin at the lower concentrations attenuated cell apoptosis, while even more apoptosis was found at the 1000 μg/L quercetin group. In conclusion, quercetin could exert beneficial or detrimental effects on the shoaling and anxiety behaviors depending on the treatment concentrations, and the underlying mechanisms are potentially associated with neuroinflammation and neuron apoptosis.
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Affiliation(s)
- Ji-Liang Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan, China; College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China.
| | - Min Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
| | - Wei Cui
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
| | - Li Yang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
| | - Chun-Nuan Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan, China
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16
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Ebrahimpour S, Shahidi SB, Abbasi M, Tavakoli Z, Esmaeili A. Quercetin-conjugated superparamagnetic iron oxide nanoparticles (QCSPIONs) increases Nrf2 expression via miR-27a mediation to prevent memory dysfunction in diabetic rats. Sci Rep 2020; 10:15957. [PMID: 32994439 PMCID: PMC7524758 DOI: 10.1038/s41598-020-71971-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 08/24/2020] [Indexed: 02/07/2023] Open
Abstract
Oxidative stress is one of the earliest defects involved in the development of diabetes-induced cognitive impairment. Nrf2 is the master regulator of the cellular antioxidant system can be regulated by some microRNAs. The study aimed to evaluate the effects of quercetin (QC) and quercetin-conjugated superparamagnetic iron oxide nanoparticles (QCSPIONs) on Nrf2-controlled antioxidant genes through the redox-sensitive miR-27a. Expression levels of miR-27a, Nrf2, SOD1, GPX1, and CAT were measured by quantitative real-time PCR. Moreover, the oxidative stress parameters including total antioxidant capacity (TAC) and histological alterations were investigated. The expression level of miR-27a was significantly up-regulated in diabetic rats. While expression levels of Nrf2, SOD1, GPX1, and CAT were significantly down-regulated under diabetic condition. Interestingly, QCSPIONs decreased expression level of miR-27a and subsequently enhanced the expression levels of Nrf2, SOD1, and CAT to the control level. No significant difference was observed in the expression level of GPX1. Besides, QC in pure and especially conjugated form was able to normalize TAC and regenerate pathological lesions in STZ-diabetic rats. Our result demonstrates that QCSPIONs as an effective combined therapy can decrease miR-27a expression, which in turn increases the Nrf2 expression and responsive antioxidant genes, resulting in improvement of memory dysfunction in diabetic rats.
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Affiliation(s)
- Shiva Ebrahimpour
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, P.O. Box: 8174673441, 81746-73441, Isfahan, Iran
| | - Seyedeh Bahar Shahidi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, P.O. Box: 8174673441, 81746-73441, Isfahan, Iran
| | - Mahnoosh Abbasi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, P.O. Box: 8174673441, 81746-73441, Isfahan, Iran
| | - Zahra Tavakoli
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, P.O. Box: 8174673441, 81746-73441, Isfahan, Iran
| | - Abolghasem Esmaeili
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, P.O. Box: 8174673441, 81746-73441, Isfahan, Iran.
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17
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Aryal S, Skinner T, Bridges B, Weber JT. The Pathology of Parkinson's Disease and Potential Benefit of Dietary Polyphenols. Molecules 2020; 25:E4382. [PMID: 32987656 PMCID: PMC7582699 DOI: 10.3390/molecules25194382] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/15/2020] [Accepted: 09/21/2020] [Indexed: 12/17/2022] Open
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder that is characterized by a loss of dopaminergic neurons, leading to bradykinesia, rigidity, tremor at rest, and postural instability, as well as non-motor symptoms such as olfactory impairment, pain, autonomic dysfunction, impaired sleep, fatigue, and behavioral changes. The pathogenesis of PD is believed to involve oxidative stress, disruption to mitochondria, alterations to the protein α-synuclein, and neuroinflammatory processes. There is currently no cure for the disease. Polyphenols are secondary metabolites of plants, which have shown benefit in several experimental models of PD. Intake of polyphenols through diet is also associated with lower PD risk in humans. In this review, we provide an overview of the pathology of PD and the data supporting the potential neuroprotective capacity of increased polyphenols in the diet. Evidence suggests that the intake of dietary polyphenols may inhibit neurodegeneration and the progression of PD. Polyphenols appear to have a positive effect on the gut microbiome, which may decrease inflammation that contributes to the disease. Therefore, a diet rich in polyphenols may decrease the symptoms and increase quality of life in PD patients.
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Affiliation(s)
| | | | | | - John T. Weber
- School of Pharmacy, Memorial University, St. John’s, NL A1B 3V6, Canada; (S.A.); (T.S.); (B.B.)
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18
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Stacchiotti A, Corsetti G. Natural Compounds and Autophagy: Allies Against Neurodegeneration. Front Cell Dev Biol 2020; 8:555409. [PMID: 33072744 PMCID: PMC7536349 DOI: 10.3389/fcell.2020.555409] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/01/2020] [Indexed: 12/12/2022] Open
Abstract
Prolonging the healthy life span and limiting neurological illness are imperative goals in gerontology. Age-related neurodegeneration is progressive and leads to severe diseases affecting motility, memory, cognitive function, and social life. To date, no effective treatments are available for neurodegeneration and irreversible neuronal loss. Bioactive phytochemicals could represent a natural alternative to ensure active aging and slow onset of neurodegenerative diseases in elderly patients. Autophagy or macroautophagy is an evolutionarily conserved clearing process that is needed to remove aggregate-prone proteins and organelles in neurons and glia. It also is crucial in synaptic plasticity. Aberrant autophagy has a key role in aging and neurodegeneration. Recent evidence indicates that polyphenols like resveratrol and curcumin, flavonoids, like quercetin, polyamine, like spermidine and sugars, like trehalose, limit brain damage in vitro and in vivo. Their common mechanism of action leads to restoration of efficient autophagy by dismantling misfolded proteins and dysfunctional mitochondria. This review focuses on the role of dietary phytochemicals as modulators of autophagy to fight Alzheimer's and Parkinson's diseases, fronto-temporal dementia, amyotrophic lateral sclerosis, and psychiatric disorders. Currently, most studies have involved in vitro or preclinical animal models, and the therapeutic use of phytochemicals in patients remains limited.
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Affiliation(s)
- Alessandra Stacchiotti
- Division of Anatomy and Physiopathology, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.,Interdepartmental University Center of Research "Adaptation and Regeneration of Tissues and Organs (ARTO)," University of Brescia, Brescia, Italy
| | - Giovanni Corsetti
- Division of Anatomy and Physiopathology, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
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19
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Zhao J, Zhu M, Kumar M, Ngo FY, Li Y, Lao L, Rong J. A Pharmacological Appraisal of Neuroprotective and Neurorestorative Flavonoids Against Neurodegenerative Diseases. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2020; 18:103-114. [PMID: 30394219 DOI: 10.2174/1871527317666181105093834] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/22/2018] [Accepted: 10/29/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND & OBJECTIVE Alzheimer's disease (AD) and Parkinson's disease (PD) affect an increasing number of the elderly population worldwide. The existing treatments mainly improve the core symptoms of AD and PD in a temporary manner and cause alarming side effects. Naturally occurring flavonoids are well-documented for neuroprotective and neurorestorative effects against various neurodegenerative diseases. Thus, we analyzed the pharmacokinetics of eight potent natural products flavonoids for the druggability and discussed the neuroprotective and neurorestorative effects and the underlying mechanisms. CONCLUSION This review provides valuable clues for the development of novel therapeutics against neurodegenerative diseases.
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Affiliation(s)
- Jia Zhao
- Department of Chinese Medicine, The University of Hong Kong Shenzhen Hospital, Shenzhen, China.,School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Mengxia Zhu
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Mukesh Kumar
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Fung Yin Ngo
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Yinghui Li
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Lixing Lao
- Department of Chinese Medicine, The University of Hong Kong Shenzhen Hospital, Shenzhen, China.,School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China
| | - Jianhui Rong
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 10 Sassoon Road, Pokfulam, Hong Kong, China.,Institute of Research and Innovation (HKU-SIRI), The University of Hong Kong Shenzhen, Shenzhen, China
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20
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Cerri S, Blandini F. Role of Autophagy in Parkinson's Disease. Curr Med Chem 2019; 26:3702-3718. [PMID: 29484979 DOI: 10.2174/0929867325666180226094351] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 01/30/2018] [Accepted: 02/13/2018] [Indexed: 12/11/2022]
Abstract
Autophagy is an essential catabolic mechanism that delivers misfolded proteins and damaged organelles to the lysosome for degradation. Autophagy pathways include macroautophagy, chaperone-mediated autophagy and microautophagy, each involving different mechanisms of substrate delivery to lysosome. Defects of these pathways and the resulting accumulation of protein aggregates represent a common pathobiological feature of neurodegenerative disorders such as Alzheimer, Parkinson and Huntington disease. This review provides an overview of the role of autophagy in Parkinson's disease (PD) by summarizing the most relevant genetic and experimental evidence showing how this process can contribute to disease pathogenesis. Given lysosomes take part in the final step of the autophagic process, the role of lysosomal defects in the impairment of autophagy and their impact on disease will also be discussed. A glance on the role of non-neuronal autophagy in the pathogenesis of PD will be included. Moreover, we will examine novel pharmacological targets and therapeutic strategies that, by boosting autophagy, may be theoretically beneficial for PD. Special attention will be focused on natural products, such as phenolic compounds, that are receiving increasing consideration due to their potential efficacy associated with low toxicity. Although many efforts have been made to elucidate autophagic process, the development of new therapeutic interventions requires a deeper understanding of the mechanisms that may lead to autophagy defects in PD and should take into account the multifactorial nature of the disease as well as the phenotypic heterogeneity of PD patients.
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Affiliation(s)
- Silvia Cerri
- Laboratory of Cellular and Molecular Neurobiology, IRCCS Mondino Foundation, Pavia, Italy
| | - Fabio Blandini
- Laboratory of Cellular and Molecular Neurobiology, IRCCS Mondino Foundation, Pavia, Italy
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21
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Ghorbani A, Amiri MS, Hosseini A. Pharmacological properties of Rheum turkestanicum Janisch. Heliyon 2019; 5:e01986. [PMID: 31294125 PMCID: PMC6595136 DOI: 10.1016/j.heliyon.2019.e01986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 04/14/2019] [Accepted: 06/18/2019] [Indexed: 02/06/2023] Open
Abstract
Medicinal herbs have been increasingly used worldwide for diseases prevention and treatment. Rheum turkestanicum Janisch. is a perennial shrub of the Polygonaceae family. Genus Rheum includes more than 60 species growing around the world which are used in foods and traditional medicines. R. turkestanicum is believed to be able to improve different kinds of disorders including diabetes, hypertension, jaundice and cancer. In recent years, this medicinal plant has been a subject of many experimental studies to document its health-beneficial properties. These studies have revealed antidiabetic, anticancer, nephroprotective, cardioprotective, and hepatoprotective properties of R. turkestanicum. The presence of flavonoids (e.g. epicatechin and quercetin) and anthraquinones (e.g. chrysophanol, physcion, and emodin) in R. turkestanicum justifies its health-beneficial effects. Nevertheless, possible therapeutic applications and safety of this plant still need to be elucidated in further clinical studies.
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Affiliation(s)
- Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Azar Hosseini
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
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22
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Amanzadeh E, Esmaeili A, Abadi REN, Kazemipour N, Pahlevanneshan Z, Beheshti S. Quercetin conjugated with superparamagnetic iron oxide nanoparticles improves learning and memory better than free quercetin via interacting with proteins involved in LTP. Sci Rep 2019; 9:6876. [PMID: 31053743 PMCID: PMC6499818 DOI: 10.1038/s41598-019-43345-w] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 04/23/2019] [Indexed: 01/20/2023] Open
Abstract
Biomedical application of quercetin (QT) as an effective flavonoid has limitations due to its low bioavailability. Superparamagnetic iron oxide nanoparticle (SPION) is a novel drug delivery system that enhances the bioavailability of quercetin. The effect of short time usage of quercetin on learning and memory function and its signaling pathways in the healthy rat is not well understood. The aim of this study was to investigate the effect of free quercetin and in conjugation with SPION on learning and memory in healthy rats and to find quercetin target proteins involved in learning and memory using Morris water maze (MWM) and computational methods respectively. Results of MWM show an improvement in learning and memory of rats treated with either quercetin or QT-SPION. Better learning and memory functions using QT-SPION reveal increased bioavailability of quercetin. Comparative molecular docking studies show the better binding affinity of quercetin to RSK2, MSK1, CytC, Cdc42, Apaf1, FADD, CRK proteins. Quercetin in comparison to specific inhibitors of each protein also demonstrates a better QT binding affinity. This suggests that quercetin binds to proteins leading to prevent neural cell apoptosis and improves learning and memory. Therefore, SPIONs could increase the bioavailability of quercetin and by this way improve learning and memory.
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Affiliation(s)
- Elnaz Amanzadeh
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran
| | - Abolghasem Esmaeili
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran.
| | | | - Nasrin Kazemipour
- Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Zari Pahlevanneshan
- Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan, Iran
| | - Siamak Beheshti
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran
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23
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Chirumbolo S, Vella A, Bjørklund G. Quercetin Might Promote Autophagy in a Middle Cerebral Artery Occlusion-Mediated Ischemia Model: Comments on Fawad-Ali Shah et al. Neurochem Res 2018; 44:297-300. [PMID: 30515707 DOI: 10.1007/s11064-018-2692-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 11/04/2018] [Accepted: 11/29/2018] [Indexed: 10/27/2022]
Affiliation(s)
- Salvatore Chirumbolo
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Strada Le Grazie 9, 37134, Verona, Italy.
| | - Antonio Vella
- Department of Medicine-University of Verona, Unit of Immunology-AOUI, University Hospital, Verona, Italy
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway
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24
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Liu YW, Liu XL, Kong L, Zhang MY, Chen YJ, Zhu X, Hao YC. Neuroprotection of quercetin on central neurons against chronic high glucose through enhancement of Nrf2/ARE/glyoxalase-1 pathway mediated by phosphorylation regulation. Biomed Pharmacother 2018; 109:2145-2154. [PMID: 30551472 DOI: 10.1016/j.biopha.2018.11.066] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/11/2018] [Accepted: 11/19/2018] [Indexed: 01/16/2023] Open
Abstract
Although dietary flavonoid quercetin alleviates diabetes-associated cognitive decline in rodents, the mechanisms are not clearly clarified. This study was designed to investigate whether quercetin showed neuroprotection on central neurons against chronic high glucose through the enhancement of Nrf2/ARE/glyoxalase 1 (Glo-1) pathway. SH-SY5Y cells were divided into 8 groups: normal glucose, high glucose (HG), osmotic pressure control, solvent control, HG plus low, middle, high concentrations of quercetin, or Nrf2 activator (sulforaphane). After treatment for 72 h, the associated parameters were measured. We found quercetin and sulforaphane increased cell viability, and enhanced Glo-1 functions (Glo-1 activity, the reduced glutathione and advanced glycation end-products levels) as well as Glo-1 protein and mRNA levels in SH-SY5Y cells cultured with HG. Meanwhile, quercetin and sulforaphane activated Nrf2/ARE pathway, reflected by the raised Nrf2 and p-Nrf2 levels, and the elevated protein and mRNA levels of γ-glutamycysteine synthase (γ-GCS), a known target gene of Nrf2/ARE signaling. Moreover, Nrf2/ARE pathway was activated after pretreatment with a PKC activator, p38 MAPK inhibitor, or GSK-3β inhibitor under the condition of HG, and quercetin addition further strengthened this pathway; however, PKC inhibition or GSK-3β activation pretreatment reversed the effects of quercetin on the protein expression of γ-GCS in the HG condition. In summary, quercetin exerts the neuroprotection by enhancing Glo-1 functions in central neurons under chronic HG condition, which may be mediated by activation of Nrf2/ARE pathway; furthermore, the increased Nrf2 phosphorylation mediated by PKC activation and/or GSK-3β inhibition may involve in the activation of Nrf2/ARE pathway.
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Affiliation(s)
- Yao-Wu Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China; Department of Pharmacology, School of Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China.
| | - Xiao-Li Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China; Department of Pharmacy, the Second People's Hospital of Wuhu, Anhui, China
| | - Li Kong
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Meng-Ya Zhang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Ya-Jing Chen
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Xia Zhu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Yun-Chao Hao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
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Joshi N, Singh S. Updates on immunity and inflammation in Parkinson disease pathology. J Neurosci Res 2017; 96:379-390. [DOI: 10.1002/jnr.24185] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/05/2017] [Accepted: 09/13/2017] [Indexed: 01/13/2023]
Affiliation(s)
- Neeraj Joshi
- Department of Biochemistry and Biophysics; Helen Diller Comprehensive Cancer Center; San Francisco California
| | - Sarika Singh
- Toxicology and Experimental Medicine Division, CSIR-Central Drug Research Institute; Lucknow India
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Aluani D, Tzankova V, Yordanov Y, Kondeva-Burdina M, Yoncheva K. In vitro protective effects of encapsulated quercetin in neuronal models of oxidative stress injury. BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1347523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Denitsa Aluani
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
| | - Virginia Tzankova
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
| | - Yordan Yordanov
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
| | - Magdalena Kondeva-Burdina
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
| | - Krassimira Yoncheva
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
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Ay M, Luo J, Langley M, Jin H, Anantharam V, Kanthasamy A, Kanthasamy AG. Molecular mechanisms underlying protective effects of quercetin against mitochondrial dysfunction and progressive dopaminergic neurodegeneration in cell culture and MitoPark transgenic mouse models of Parkinson's Disease. J Neurochem 2017; 141:766-782. [PMID: 28376279 PMCID: PMC5643047 DOI: 10.1111/jnc.14033] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 12/22/2022]
Abstract
Quercetin, one of the major flavonoids in plants, has been recently reported to have neuroprotective effects against neurodegenerative processes. However, since the molecular signaling mechanisms governing these effects are not well clarified, we evaluated quercetin's effect on the neuroprotective signaling events in dopaminergic neuronal models and further tested its efficacy in the MitoPark transgenic mouse model of Parkinson's disease (PD). Western blot analysis revealed that quercetin significantly induced the activation of two major cell survival kinases, protein kinase D1 (PKD1) and Akt in MN9D dopaminergic neuronal cells. Furthermore, pharmacological inhibition or siRNA knockdown of PKD1 blocked the activation of Akt, suggesting that PKD1 acts as an upstream regulator of Akt in quercetin-mediated neuroprotective signaling. Quercetin also enhanced cAMP response-element binding protein phosphorylation and expression of the cAMP response-element binding protein target gene brain-derived neurotrophic factor. Results from qRT-PCR, Western blot analysis, mtDNA content analysis, and MitoTracker assay experiments revealed that quercetin augmented mitochondrial biogenesis. Quercetin also increased mitochondrial bioenergetics capacity and protected MN9D cells against 6-hydroxydopamine-induced neurotoxicity. To further evaluate the neuroprotective efficacy of quercetin against the mitochondrial dysfunction underlying PD, we used the progressive dopaminergic neurodegenerative MitoPark transgenic mouse model of PD. Oral administration of quercetin significantly reversed behavioral deficits, striatal dopamine depletion, and TH neuronal cell loss in MitoPark mice. Together, our findings demonstrate that quercetin activates the PKD1-Akt cell survival signaling axis and suggest that further exploration of quercetin as a promising neuroprotective agent for treating PD may offer clinical benefits.
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Affiliation(s)
- Muhammet Ay
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Jie Luo
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Monica Langley
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Huajun Jin
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Vellareddy Anantharam
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Arthi Kanthasamy
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Anumantha G. Kanthasamy
- Parkinson’s Disorder Research Laboratory, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
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Mehta V, Parashar A, Udayabanu M. Quercetin prevents chronic unpredictable stress induced behavioral dysfunction in mice by alleviating hippocampal oxidative and inflammatory stress. Physiol Behav 2017; 171:69-78. [DOI: 10.1016/j.physbeh.2017.01.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/29/2016] [Accepted: 01/04/2017] [Indexed: 12/20/2022]
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Singh S, Jamwal S, Kumar P. Neuroprotective potential of Quercetin in combination with piperine against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced neurotoxicity. Neural Regen Res 2017; 12:1137-1144. [PMID: 28852397 PMCID: PMC5558494 DOI: 10.4103/1673-5374.211194] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
1-Methy-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin that selectively damages dopaminergic neurons in the substantia nigra pars compacta and induces Parkinson's like symptoms in rodents. Quercetin (QC) is a natural polyphenolic bioflavonoid with potent antioxidant and anti-inflammatory properties but lacks of clinical attraction due to low oral bioavailability. Piperine is a well established bioavailability enhancer used pre-clinically to improve the bioavailability of antioxidants (e.g., Quercetin). Therefore, the present study was designed to evaluate the neuroprotective potential of QC together with piperine against MPTP-induced neurotoxicity in rats. MPTP (100 μg/μL/rat, bilaterally) was injected intranigrally on days 1, 4 and 7 using a digital stereotaxic apparatus. QC (25 and 50 mg/kg, intragastrically) and QC (25 mg/kg, intragastrically) in combination with piperine (2.5 mg/kg, intragastrically) were administered daily for 14 days starting from day 8 after the 3rd injection of MPTP. On day 22, animals were sacrificed and the striatum was isolated for oxidative stress parameter (thiobarbituric acid reactive substances, nitrite and glutathione), neuroinflammatory cytokine (interleukin-1β, interleukin-6, and tumor necrosis factor-α) and neurotransmitter (dopamine, norepinephrine, serotonin, gamma-aminobutyric acid, glutamate, 3,4-dihydroxyphenylacetic acid, homovanillic acid, and 5-hydroxyindoleacetic acid) evaluations. Bilateral infusion of MPTP into substantia nigra pars compacta led to significant motor deficits as evidenced by impairments in locomotor activity and rotarod performance in open field test and grip strength and narrow beam walk performance. Both QC (25 and 50 mg/kg) and QC (25 mg/kg) in combination with piperine (2.5 mg/kg), in particular the combination therapy, significantly improved MPTP-induced behavioral abnormalities in rats, reversed the abnormal alterations of neurotransmitters in the striatum, and alleviated oxidative stress and inflammatory response in the striatum. These findings indicate that piperine can enhance the antioxidant and anti-inflammatory properties of QC, and QC in combination with piperine exhibits strong neuroprotective effects against MPTP-induced neurotoxicity.
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Affiliation(s)
- Shamsher Singh
- Department of Pharmacology, I.S.F College of Pharmacy, Ferozepur Road, Moga, Punjab, India.,I.K. Gujral Punjab Technical University, Jalandhar, Punjab, India
| | - Sumit Jamwal
- Department of Pharmacology, I.S.F College of Pharmacy, Ferozepur Road, Moga, Punjab, India.,I.K. Gujral Punjab Technical University, Jalandhar, Punjab, India
| | - Puneet Kumar
- Department of Pharmacology, I.S.F College of Pharmacy, Ferozepur Road, Moga, Punjab, India
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Re-Cloning the N27 Dopamine Cell Line to Improve a Cell Culture Model of Parkinson's Disease. PLoS One 2016; 11:e0160847. [PMID: 27512998 PMCID: PMC4981411 DOI: 10.1371/journal.pone.0160847] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 07/26/2016] [Indexed: 12/23/2022] Open
Abstract
Parkinson's disease is characterized by the death of dopaminergic neurons in the substantia nigra. To understand the molecular mechanisms of the disease, an in vitro model is important. In the 1990s, we used the SV40 large T antigen to immortalize dopaminergic neurons derived from Embryonic Day 14 rat mesencephalon. We selected a clone for its high expression of dopaminergic neuron markers such as tyrosine hydroxylase (TH), and we named it 1RB3AN27 (N27). Because the original N27 cell line has been passaged many times, the line has become a mixture of cell types with highly variable expression of TH. In the current study, we have performed multiple rounds of clonal cultures and have identified a dopaminergic cell clone expressing high levels of TH and the dopamine transporter (DAT). We have named this new clone N27-A. Nearly 100% of N27-A cells express TH, DAT and Tuj1. Western blots have confirmed that N27-A cells have three to four times the levels of TH and DAT compared to the previous mixed population in N27. Further analysis has shown that the new clone expresses the dopamine neuron transcription factors Nurr1, En1, FoxA2 and Pitx3. The N27-A cells express the vesicular monoamine transporter (VMAT2), but do not express dopamine-beta-hydroxylase (DβH), the enzyme responsible for converting dopamine to norepinephrine. Functional analysis has shown that N27-A cells are more sensitive than N27 cells to neurotoxins taken up by the dopamine transporter such as 6-hydroxydopamine and 1-methyl-4-phenylpyridine (MPP+). The DAT inhibitor nomifensine can block MPP+ induced toxicity. The non-selective toxic effects of hydrogen peroxide were similar in both cell lines. The N27-A cells show dopamine release under basal and depolarization conditions. We conclude that the new N27-A clone of the immortalized rat dopaminergic cell line N27 should provide an improved in vitro model for Parkinson's disease research.
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