1
|
Singh A, Sinha S, Singh NK. Dietary Natural Flavonoids: Intervention for MAO-B Against Parkinson's Disease. Chem Biol Drug Des 2024; 104:e14619. [PMID: 39223743 DOI: 10.1111/cbdd.14619] [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: 02/21/2024] [Revised: 07/27/2024] [Accepted: 08/17/2024] [Indexed: 09/04/2024]
Abstract
Parkinson's disease (PD) stands as the second most common neurological disorder after Alzheimer's disease, primarily affecting the elderly population and significantly compromising their quality of life. The precise etiology of PD remains elusive, but recent research has shed light on potential factors, including the formation of α-synuclein aggregates, oxidative stress, neurotransmitter imbalances, and dopaminergic neurodegeneration in the substantia nigra pars compacta (SNpc) region of the brain, culminating in motor symptoms such as bradykinesia, akinesia, tremors, and rigidity. Monoamine oxidase (MAO) is an essential enzyme, comprising two isoforms, MAO-A and MAO-B, responsible for the oxidation of monoamines such as dopamine. Increased MAO-B activity is responsible for decreased dopamine levels in the SNpc region of mid brain which is remarkably associated with the pathogenesis of PD-like manifestations. Inhibitors of MAO-B enhance striatal neuronal responses to dopamine, making them valuable in treating PD, which involves dopamine deficiency. Clinically approved MAO-B inhibitors such as selegiline, L-deprenyl, pargyline, and rasagiline are employed in the management of neurodegenerative conditions associated with PD. Current therapeutic interventions including MAO-B inhibitors for PD predominantly aim to alleviate these motor symptoms but often come with a host of side effects that can be particularly challenging for the patients. While effective, they have limitations, prompting a search for alternative treatments, there is a growing interest in exploring natural products notably flavonoids as potential sources of novel MAO-B inhibitors. In line with that, the present review focuses on natural flavonoids of plant origin that hold promise as potential candidates for the development of novel MAO-B inhibitors. The discussion encompasses both in vitro and in vivo studies, shedding light on their potential therapeutic applications. Furthermore, this review underscores the significance of exploring natural products as valuable reservoirs of MAO-B inhibitors, offering new avenues for drug development and addressing the pressing need for improved treatments in PD-like pathological conditions. The authors of this review majorly explore the neuroprotective potential of natural flavonoids exhibiting notable MAO-B inhibitory activity and additionally multi-targeted approaches in the treatment of PD with clinical evidence and challenges faced in current therapeutic approaches.
Collapse
Affiliation(s)
- Ashini Singh
- Division of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, India
| | - Suman Sinha
- Division of Pharmaceutical Chemistry, Institute of Pharmaceutical Research, GLA University, Mathura, India
| | - Niraj Kumar Singh
- Division of Pharmacology, Institute of Pharmaceutical Research, GLA University, Mathura, India
| |
Collapse
|
2
|
Upadhyay P, Tyagi A, Agrawal S, Kumar A, Gupta S. Bidirectional Effect of Triphala on Modulating Gut-Brain Axis to Improve Cognition in the Murine Model of Alzheimer's Disease. Mol Nutr Food Res 2024; 68:e2300104. [PMID: 37767948 DOI: 10.1002/mnfr.202300104] [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: 02/22/2023] [Revised: 06/23/2023] [Indexed: 09/29/2023]
Abstract
SCOPE The emerging role of gut microbiota and their metabolites in the modulation of the gut-brain axis has received much attention as a new hope for the treatment of hard-to-treat chronic neurodegenerative diseases like Alzheimer's disease. The naturally occurring polyphenols can restore the gut-brain axis by modulating gut microbiota and brain neurotransmitters. The Indian traditional medicine Triphala, a rich source of polyphenols, has been used on humans based on Prakriti or disease conditions for many years. METHODS AND RESULTS In this study, the dual mode (morning and evening) action of Triphala is used to provide scientific evidence of its superior preventive and therapeutic efficacy in C57BL/6 and 5xFAD, APP/PS1 transgenic mouse model of Alzheimer's disease. The study observes that Triphala treatment has significantly improved cognitive function, by modulating the APP pathway, reducing inflammation, and restoring the gut-brain axis by increasing the gut microbiota phyla of Bacteroides, Proteobacteria, Actinobacteria, etc., involved in maintaining the gut homeostasis. CONCLUSIONS The study paves a new path for using dual modes of Triphala alone or in combination to treat incurable AD.
Collapse
Affiliation(s)
- Prabhat Upadhyay
- Molecular Sciences Lab, National Institute of Immunology New Delhi, Aruna Asaf Ali Marg, New Delhi, New Delhi, 110067, India
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Anurag Tyagi
- Molecular Sciences Lab, National Institute of Immunology New Delhi, Aruna Asaf Ali Marg, New Delhi, New Delhi, 110067, India
| | - Sakshi Agrawal
- Molecular Sciences Lab, National Institute of Immunology New Delhi, Aruna Asaf Ali Marg, New Delhi, New Delhi, 110067, India
| | - Anil Kumar
- Molecular Sciences Lab, National Institute of Immunology New Delhi, Aruna Asaf Ali Marg, New Delhi, New Delhi, 110067, India
| | - Sarika Gupta
- Molecular Sciences Lab, National Institute of Immunology New Delhi, Aruna Asaf Ali Marg, New Delhi, New Delhi, 110067, India
| |
Collapse
|
3
|
Bu J, Mahan Y, Zhang S, Wu X, Zhang X, Zhou L, Zhang Y. Acacetin inhibits inflammation by blocking MAPK/NF-κB pathways and NLRP3 inflammasome activation. Front Pharmacol 2024; 15:1286546. [PMID: 38389927 PMCID: PMC10883387 DOI: 10.3389/fphar.2024.1286546] [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: 08/31/2023] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
Objective: Our preliminary research indicates that acacetin modulates the nucleotide-binding oligomerization domain (NOD)-like receptor pyrin domain containing 3 (NLRP3) inflammasome, providing protection against Alzheimer's Disease (AD) and cerebral ischemic reperfusion injury. The mechanisms of acacetin to inhibit the activation of the NLRP3 inflammasome remain fully elucidated. This study aims to investigate the effects and potential mechanisms of acacetin on various agonists induced NLRP3 inflammasome activation. Methods: A model for the NLRP3 inflammasome activation was established in mouse bone marrow-derived macrophages (BMDMs) using Monosodium Urate (MSU), Nigericin, Adenosine Triphosphate (ATP), and Pam3CSK4, separately. Western blot analysis (WB) was employed to detect Pro-caspase-1, Pro-Interleukin-1β (Pro-IL-1β) in cell lysates, and caspase-1, IL-1β in supernatants. Enzyme-Linked Immunosorbent Assay (ELISA) was used to measured the release of IL-1β, IL-18, and Tumor Necrosis Factor-alpha (TNF-α) in cell supernatants to assess the impact of acacetin on NLRP3 inflammasome activation. The lactate dehydrogenase (LDH) release was also assessed. The Nuclear Factor Kappa B (NF-κB) and Mitogen-Activated Protein Kinase (MAPK) signaling pathways related proteins were evaluated by WB, and NF-κB nuclear translocation was observed via laser scanning confocal microscopy (LSCM). Disuccinimidyl Suberate (DSS) cross-linking was employed to detect oligomerization of Apoptosis-associated Speck-like protein containing a Caspase Recruitment Domain (ASC), and LSCM was also used to observe Reactive Oxygen Species (ROS) production. Inductively Coupled Plasma (ICP) and N-(6-methoxyquinolyl) acetoethyl ester (MQAE) assays were utilized to determined the effects of acacetin on the efflux of potassium (K+) and chloride (Cl-) ions. Results: Acacetin inhibited NLRP3 inflammasome activation induced by various agonists, reducing the release of TNF-α, IL-1β, IL-18, and LDH. It suppressed the expression of Lipopolysaccharides (LPS)-activated Phosphorylated ERK (p-ERK), p-JNK, and p-p38, inhibited NF-κB p65 phosphorylation and nuclear translocation. Acacetin also reduced ROS production and inhibited ASC aggregation, thus suppressing NLRP3 inflammasome activation. Notably, acacetin did not affect K+ and Cl-ions efflux during the activation process. Conclusion: Acacetin shows inhibitory effects on both the priming and assembly processes of the NLRP3 inflammasome, positioning it as a promising new candidate for the treatment of NLRP3 inflammasome-related diseases.
Collapse
Affiliation(s)
- Juan Bu
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Yeledan Mahan
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Shengnan Zhang
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Xuanxia Wu
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Xiaoling Zhang
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Ling Zhou
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Yanmin Zhang
- Scientific Research and Education Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| |
Collapse
|
4
|
Pérez-Valero Á, Ye S, Magadán-Corpas P, Villar CJ, Lombó F. Metabolic engineering in Streptomyces albidoflavus for the biosynthesis of the methylated flavonoids sakuranetin, acacetin, and genkwanin. Microb Cell Fact 2023; 22:234. [PMID: 37964284 PMCID: PMC10648386 DOI: 10.1186/s12934-023-02247-3] [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: 07/24/2023] [Accepted: 11/09/2023] [Indexed: 11/16/2023] Open
Abstract
Flavonoids are important plant secondary metabolites showing antioxidant, antitumor, anti-inflammatory, and antiviral activities, among others. Methylated flavonoids are particularly interesting compared to non-methylated ones due to their greater stability and intestinal absorption, which improves their oral bioavailability. In this work we have stablished a metabolic engineered strain of Streptomyces albidoflavus with enhanced capabilities for flavonoid production, achieving a 1.6-fold increase in the biosynthesis of naringenin with respect to the parental strain. This improved strain, S. albidoflavus UO-FLAV-004, has been used for the heterologous biosynthesis of the methylated flavonoids sakuranetin, acacetin and genkwanin. The achieved titers of sakuranetin and acacetin were 8.2 mg/L and 5.8 mg/L, respectively. The genkwanin titers were 0.8 mg/L, with a bottleneck identified in this producing strain. After applying a co-culture strategy, genkwanin production titers reached 3.5 mg/L, which represents a 4.4-fold increase. To our knowledge, this study presents the first biosynthesis of methylated flavonoids in not only any Streptomyces species, but also in any Gram-positive bacteria.
Collapse
Affiliation(s)
- Álvaro Pérez-Valero
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Oviedo, Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Principality of Asturias, Spain
| | - Suhui Ye
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Oviedo, Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Principality of Asturias, Spain
| | - Patricia Magadán-Corpas
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Oviedo, Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Principality of Asturias, Spain
| | - Claudio J Villar
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Oviedo, Principality of Asturias, Spain
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Principality of Asturias, Spain
| | - Felipe Lombó
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, Oviedo, Principality of Asturias, Spain.
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Oviedo, Principality of Asturias, Spain.
- ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Principality of Asturias, Spain.
| |
Collapse
|
5
|
Yoo JH, Lee JS, Jang JH, Jung JI, Kim EJ, Choi SY. AGEs Blocker™ (Goji Berry, Fig, and Korean Mint Mixed Extract) Inhibits Skin Aging Caused by Streptozotocin-Induced Glycation in Hairless Mice. Prev Nutr Food Sci 2023; 28:134-140. [PMID: 37416794 PMCID: PMC10321449 DOI: 10.3746/pnf.2023.28.2.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/21/2023] [Accepted: 05/02/2023] [Indexed: 07/08/2023] Open
Abstract
Glycation is a cause of skin aging. This study investigated in a glycation-induced skin aging mouse model the effects on skin and mechanism of action of AGEs Blocker™ (AB), which contains goji berry, fig, and Korean mint mixed extract. This study sought to demonstrate the antiglycation effect of streptozotocin, thereby improving skin aging, by measuring advanced glycation end products (AGEs) and various skin parameters, including collagen; matrix metalloproteinases (MMPs); inflammatory cytokines; activities of oxidative enzymes; and skin wrinkles, elasticity, and hydration. This study found that skin wrinkles, elasticity, and hydration improved with AB. Particularly, the oral administration of AB suppressed AGEs, receptors of AGEs, and carboxymethyl lysine in blood and skin tissue. In addition, AB increased the activities of antioxidative enzymes, reduced inflammatory cytokines, suppressed MMP-9 expression, and increased the contents of collagen and hyaluronic acid, ultimately suppressing skin wrinkles and increasing skin elasticity and hydration. Therefore, AB can inhibit skin aging through its antiglycation effect and is thus considered a good ingredient for skin care products.
Collapse
Affiliation(s)
- Jin Hee Yoo
- Functional Ingredient Development Team, COSMAX NS, Inc., Gyeonggi 13486 Korea
| | - Je Sung Lee
- New Technology Business Team, COSMAX NS, Inc., Gyeonggi 13486 Korea
| | - Ji Hwan Jang
- New Technology Business Team, COSMAX NS, Inc., Gyeonggi 13486 Korea
| | - Jae In Jung
- Industry coupled Cooperation Center for Bio Healthcare Materials, Hallym University, Gangwon 24252, Korea
| | - Eun Ji Kim
- Industry coupled Cooperation Center for Bio Healthcare Materials, Hallym University, Gangwon 24252, Korea
| | - Su-Young Choi
- Functional Ingredient Development Team, COSMAX NBT, Inc., Gyeonggi 13487, Korea
| |
Collapse
|
6
|
Zhuang L, Li C, Peng F, Xue E, Li W, Sun X, Chen P, Zhou Q, Xue L. Depletion of ESCRT ameliorates APP-induced AD-like symptoms in Drosophila. J Cell Physiol 2023. [PMID: 37183375 DOI: 10.1002/jcp.31035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/30/2023] [Accepted: 04/24/2023] [Indexed: 05/16/2023]
Abstract
The amyloid-β (Aβ) peptide, produced from amyloid precursor protein (APP) by β and γ-secretases, has been implicated in the etiology of Alzheimer's disease (AD). However, the precise intracellular trafficking pathway of APP and its subcellular locations to produce Aβ have remained unclear. To address these issues, we established fly AD models that recapitulated multiple AD-like symptoms by expressing human APP in the Drosophila nerve system. The ESCRT (endosomal sorting complexes required for transport) machinery regulates the sorting and trafficking of endocytosed proteins, yet its role in AD pathogenesis has not been explored in vivo. We found that knockdown of distinct ESCRT components ameliorated APP-induced morphological and behavioral defects, including impaired wing expansion, eye degeneration, dopamine neuron loss, locomotor disability, lifespan shortening, and cognitive deficits. Mechanistically, we showed that impaired ESCRT impeded APP's intracellular transportation from early endosomes to late endosomes, resulting in reduced Aβ production and amyloid deposit load. These data suggest that APP undergoes ESCRT-mediated endocytic trafficking, and Aβ is generated mainly in late endosomes. Our data provide the first in vivo evidence to support a physiological role of ESCRT in AD pathogenesis, suggesting that interfering with ESCRT machinery might be an alternative therapeutic strategy for AD.
Collapse
Affiliation(s)
- Luming Zhuang
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Chenglin Li
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Fei Peng
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Elleen Xue
- Mathey College, Princeton University, Princeton, New Jersey, USA
| | - Wenzhe Li
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Xinyue Sun
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Ping Chen
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Qian Zhou
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
| | - Lei Xue
- Shanghai Key Laboratory of Signaling and Diseases Research, School of Life Science and Technology, The First Rehabilitation Hospital of Shanghai, Tongji University, Shanghai, China
- Zhuhai Precision Medical Center, Zhuhai People's Hospital, Guangdong, Zhuhai, China
| |
Collapse
|
7
|
An Acid-Sensitive Bone Targeting Delivery System Carrying Acacetin Prevents Osteoporosis in Ovariectomized Mice. Pharmaceuticals (Basel) 2022; 16:ph16010002. [PMID: 36678499 PMCID: PMC9867347 DOI: 10.3390/ph16010002] [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: 11/18/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
One effective treatment for postmenopausal osteoporosis is to inhibit osteoclasts and subsequent bone resorption. In our study, we demonstrated that acacetin, a flavone with potential therapeutic effects in infections, cancers, and several metabolic disorders, inhibited osteoclast differentiation and bone resorption in vitro. For improving the efficacy of acacetin in vivo, we developed an acid-sensitive bone-targeting delivery system composed of an acid-sensitive linker (N-ε-maleimidocaproic acid hydrazide, EMCH) for ensuring an effective release of acacetin at the site of action and a hydrophilic aspartic acid hexapeptide ((Asp)6, D6) as the effective bone targeting agent. Our results revealed that Acacetin-EMCH-D6 specifically bound to the bone surface once administrated in vivo, prolonged the retention time in bone and released acacetin at the osteoclastic bone resorption sites where the acidity is higher. We further demonstrated that, in ovariectomy-induced osteoporosis mice, treatment with Acacetin-EMCH-D6 inhibited osteoclast formation and increased trabecular bone mass. On the contrary, neither acacetin nor EMCH-D6 with the same dosage alone showed significant anti-osteoporosis effects in vivo. Mechanistically, targeted delivery of acacetin to the bone resorption sites by Acacetin-EMCH-D6 inhibited autophagy through activating PI3K/AKT/mTOR pathway in osteoclasts, while the activation of autophagy by rapamycin partially reversed the inhibitory effects of acacetin in vitro and in vivo. In summary, our study, for the first time, showed that the acid-sensitive bone-targeting delivery system carrying acacetin was effective for the treatment of postmenopausal osteoporosis. Thus, targeted delivery of acacetin using Acacetin-EMCH-D6 to bone resorption sites is a promising therapy for osteoporosis.
Collapse
|
8
|
Insights into the Explicit Protective Activity of Herbals in Management of Neurodegenerative and Cerebrovascular Disorders. Molecules 2022; 27:molecules27154970. [PMID: 35956919 PMCID: PMC9370592 DOI: 10.3390/molecules27154970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
The longstanding progressive neurodegenerative conditions of the central nervous system arise mainly due to deterioration, degradation and eventual neuronal cell loss. As an individual ages, the irreversible neurodegenerative disorders associated with aging also begin to develop, and these have become exceedingly prominent and pose a significant burden mentally, socially and economically on both the individual and their family. These disorders express several symptoms, such as tremors, dystonia, loss of cognitive functions, impairment of motor activity leading to immobility, loss of memory and many more which worsen with time. The treatment employed in management of these debilitating neurodegenerative disorders, such as Parkinson’s disease (which mainly involves the loss of dopaminergic neurons in the nigrostriatal region), Alzheimer’s disease (which arises due to accumulation of Tau proteins causing diffusive atrophy in the brain), Huntington’s disease (which involves damage of striatal and spinal neurons, etc.), have several adverse effects, leading to exploration of several lead targets and molecules existing in herbal drugs. The current review highlights the mechanistic role of natural products in the treatment of several neurodegenerative and cerebrovascular diseases such as Parkinson’s disease, Alzheimer’s disease, ischemic stroke and depression.
Collapse
|
9
|
Zhou T, Zheng A, Zhang W, Lu X, Chen H, Tan H. Concise total syntheses of two flavans and structure revision assisted by quantum NMR calculations. Org Biomol Chem 2022; 20:4096-4100. [PMID: 35522925 DOI: 10.1039/d2ob00634k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A two-step protecting-group-free protocol for the synthesis of 3'-hydroxy-5,7-dimethoxy-4-O-2'-cycloflavan (1) and concise total synthesis of 4'-hydroxy-5,7-dimethoxy-4-O-2'-cycloflavan (8) enabled by a PTSA triggered bioinspired olefin isomerization/hemiacetalization/dehydration/[3 + 3]-type cycloaddition cascade reaction are reported. The successful synthesis of cycloflavan 8 along with GIAO 13C NMR calculations of flavan-4-ol 9 and cycloflavan 8 indicated the misassignment of the flavonoid isolated previously and realized the revision of its actual structure.
Collapse
Affiliation(s)
- Tingting Zhou
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China. .,School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| | - Anquan Zheng
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China. .,School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| | - Wenge Zhang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Xiuxiang Lu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Huiyu Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China.,School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, People's Republic of China
| | - Haibo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China. .,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, 571158, People's Republic of China
| |
Collapse
|
10
|
Temviriyanukul P, Kittibunchakul S, Trisonthi P, Kunkeaw T, Inthachat W, Siriwan D, Suttisansanee U. Mangifera indica ‘Namdokmai’ Prevents Neuronal Cells from Amyloid Peptide Toxicity and Inhibits BACE-1 Activities in a Drosophila Model of Alzheimer’s Amyloidosis. Pharmaceuticals (Basel) 2022; 15:ph15050591. [PMID: 35631418 PMCID: PMC9146065 DOI: 10.3390/ph15050591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 02/04/2023] Open
Abstract
Alzheimer’s disease (AD) is a progressive neurological illness with few effective treatments. Thus, ameliorating the effects of AD using natural products has attracted global attention with promising efficacy and safety. In this study, ten tropical fruits including Ananas comosus ‘Phulae’, Ananas comosus ‘Pattavia’, Carica papaya ‘Khaekdum’, Carica papaya ‘Khaeknuan’, Durio zibethinus ‘Monthong’, Durio zibethinus ‘Chanee’, Psidium guajava ‘Kimju’, Psidium guajava ‘Keenok’, Mangifera indica ‘Kaew’ and Mangifera indica ‘Namdokmai’ were screened for their inhibitory activities against the key enzymes, cholinesterases and β-secretase (BACE-1), involved in AD pathogenesis. The top three fruit extracts with promising in vitro anti-AD activities were further investigated using rat pheochromocytoma PC-12 neuronal cell line and Drosophila AD model. Data showed that M. indica ‘Kaew’, M. indica ‘Namdokmai’ and P. guajava ‘Kimju’ reduced Aβ1–42-mediated neurotoxicity by promoting glutathione-dependent enzymes, while M. indica ‘Namdokmai’ limited Aβ1–42 peptide formation via BACE-1 inhibition and amended locomotory behavior of the Drosophila AD model. Results indicated the potential anti-AD properties of tropical fruits, particularly M. indica ‘Namdokmai’ in the prevention of Aβ1–42-mediated neurotoxicity and as a BACE-1 blocker.
Collapse
Affiliation(s)
- Piya Temviriyanukul
- Food and Nutrition Academic and Research Cluster, Institute of Nutrition, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom 73170, Thailand; (P.T.); (S.K.); (T.K.); (W.I.)
| | - Suwapat Kittibunchakul
- Food and Nutrition Academic and Research Cluster, Institute of Nutrition, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom 73170, Thailand; (P.T.); (S.K.); (T.K.); (W.I.)
| | - Piyapat Trisonthi
- Institute of Food Research and Product Development, Kasetsart University, Bangkok 10900, Thailand;
| | - Thanit Kunkeaw
- Food and Nutrition Academic and Research Cluster, Institute of Nutrition, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom 73170, Thailand; (P.T.); (S.K.); (T.K.); (W.I.)
| | - Woorawee Inthachat
- Food and Nutrition Academic and Research Cluster, Institute of Nutrition, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom 73170, Thailand; (P.T.); (S.K.); (T.K.); (W.I.)
| | - Dalad Siriwan
- Institute of Food Research and Product Development, Kasetsart University, Bangkok 10900, Thailand;
- Correspondence: (D.S.); (U.S.)
| | - Uthaiwan Suttisansanee
- Food and Nutrition Academic and Research Cluster, Institute of Nutrition, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom 73170, Thailand; (P.T.); (S.K.); (T.K.); (W.I.)
- Correspondence: (D.S.); (U.S.)
| |
Collapse
|
11
|
Zhao Y, Yang WQ, Yu L, Yang J, Zhu HR, Zhang L. Dl-3-n-butylphthalide alleviates cognitive impairment in amyloid precursor protein/presenilin 1 transgenic mice by regulating the striatal-enriched protein tyrosine phosphatase/ERK/cAMP-response element-binding protein signaling pathway. Exp Ther Med 2022; 23:319. [PMID: 35350668 PMCID: PMC8943801 DOI: 10.3892/etm.2022.11248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 01/04/2022] [Indexed: 12/27/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by cognitive impairment and the deposition of amyloid plaques in the brain. In a transgenic mouse model of AD, cognitive impairment and synaptic dysfunction were revealed to be associated with soluble amyloid oligomers and to occur prior to plaque formation. The results of our previous studies revealed that striatal-enriched protein tyrosine phosphatase (STEP)61 negatively regulated the β-amyloid protein-mediated ERK/cAMP-response element-binding protein (CREB) signaling pathway. Dl-3-n-butylphthalide (NBP) is a synthetic compound approved by the Food and Drug Administration of China for the treatment of ischemic stroke in 2002. Studies have shown that the neuroprotective effects of NBP involve multiple mechanisms. The present study further explored the mechanism of NBP therapy in amyloid precursor protein (APP)/presenilin 1 (PS1) transgenic mice, and the involvement of the STEP/ERK/CREB signaling pathway. The results suggested that NBP treatment effectively ameliorated the spatial learning and memory impairment of the APP/PS1 transgenic mice, which was assessed using a Morris water maze. In addition, NBP reduced amyloid-induced activation of STEP61 levels, while increasing phosphorylated (p)-ERK1/2 and p-CREB levels in the cerebral cortex and hippocampus of APP/PS1 transgenic mice by western blotting and immunostaining. In conclusion, the present study provided evidence to suggest that the new drug NBP improved amyloid-induced learning and memory deficits, likely through the regulation of the STEP/ERK/CREB pathway. The results revealed that NBP, as a multi-target drug, may exert a neuroprotective effect. Therefore, NBP may serve as an effective treatment for AD.
Collapse
Affiliation(s)
- Yan Zhao
- Life Science Institution, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Wen-Qiang Yang
- Life Science Institution, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Lu Yu
- Provincial Key Laboratory of Cardiovascular and Cerebrovascular Drug Basic Research, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Jing Yang
- Provincial Key Laboratory of Cardiovascular and Cerebrovascular Drug Basic Research, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Hai-Rong Zhu
- Department of Neurology, Affiliated Taizhou Hospital of Nanjing University of Chinese Medicine, Taizhou, Jiangsu 225300, P.R. China
| | - Lin Zhang
- Department of Neurology, Affiliated Wenling Hospital of Wenzhou Medical University, Wenling, Zhejiang 317500, P.R. China,Correspondence to: Dr Lin Zhang, Department of Neurology, Affiliated Wenling Hospital of Wenzhou Medical University, 333 Chuan'an South Road, Chengxi Street, Wenling, Zhejiang 317500, P.R. China
| |
Collapse
|
12
|
Pterostilbene Promotes Mean Lifespan in Both Male and Female Drosophila Melanogaster Modulating Different Proteins in the Two Sexes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:1744408. [PMID: 35222791 PMCID: PMC8865974 DOI: 10.1155/2022/1744408] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 11/17/2022]
Abstract
Aging is a multifactorial phenomenon characterized by degenerative processes closely connected to oxidative damage and chronic inflammation. Recently, many studies have shown that natural bioactive compounds are useful in delaying the aging process. In this work, we studied the effects of an in vivo supplementation of the stilbenoid pterostilbene on lifespan extension in Drosophila melanogaster. We found that the average lifespan of flies of both sexes was increased by pterostilbene supplementation with a higher effect in females. The expression of longevity related genes (Sir2, Foxo, and Notch) was increased in both sexes but with different patterns. Pterostilbene counteracted oxidative stress induced by ethanol and paraquat and up-regulated the antioxidant enzymes Ho e Trxr-1 in male but not in female flies. On the other hand, pterostilbene decreased the inflammatory mediators dome and egr only in female flies. Proteomic analysis revealed that pterostilbene modulates 113 proteins in male flies and only 9 in females. Only one of these proteins was modulated by pterostilbene in both sexes: vacuolar H[+] ATPase 68 kDa subunit 2 (Vha68-2) that was strongly down-regulated. These findings suggest a potential role of pterostilbene in increasing lifespan both in male and female flies by mechanisms that seem to be different in the two sexes, highlighting the need to conduct nutraceutical supplementation studies on males and females separately in order to give more reliable results.
Collapse
|
13
|
Bu J, Zhang Y, Mahan Y, Shi S, Wu X, Zhang X, Wang Z, Zhou L. Acacetin improves cognitive function of APP/PS1 Alzheimer's disease model mice via the NLRP3 inflammasome signaling pathway. Transl Neurosci 2022; 13:390-397. [PMID: 36382256 PMCID: PMC9623727 DOI: 10.1515/tnsci-2022-0254] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/28/2022] [Accepted: 10/07/2022] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Acacetin (5,7-dihydroxy-4'-methoxyflavone), one of the main extractions from Saussurea involucrata, has anti-inflammatory effects. Our previous study found that acacetin inhibited the Nod-like receptor pyrin domain containing 3 (NLRP3) signaling pathway after cerebral ischemia-reperfusion injury. NLRP3 inflammasome plays a role in Alzheimer's disease (AD) process. However, few studies have examined the effects of acacetin in AD. METHODS We randomly divided APP swe/PS1dE9 double transgenic mice into acacetin group (intraperitoneal injection of 25 mg/kg acacetin) and AD model group (intraperitoneal injection of same volume of saline). C57BL/6 mice were selected as control group (same treatment with AD model group). After treating for 30 days, a Morris water maze test was conducted to evaluate spatial learning and memory of the mice. Senile plaque (SP) formation was evaluated by immunohistochemistry. NLRP3 inflammasome-related inflammatory factors and amyloid-β-42 were detected by Western blot or enzyme-linked immunosorbent assay. RESULTS Acacetin improved spatial learning and memory of AD mice and reduced APP/β expression, thereby decreasing SP formation in the brain. Acacetin also reduced the expression of NLRP3, cysteinyl aspartate-specific proteinase 1 (caspase-1), and interleukin-1β (IL-1β) and the release of inflammatory factors, tumor necrosis factor-α (TNF-α) and IL-1β. CONCLUSIONS Acacetin improved the learning and memory abilities of AD mice and exerted a protective effect on AD by inhibiting the NLRP3 signaling pathway and reducing SP formation.
Collapse
Affiliation(s)
- Juan Bu
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| | - Yanmin Zhang
- Scientific Research and Education Center, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang 830001, PR China
| | - Yeledan Mahan
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| | - Shen Shi
- Disinfection and Infection Control Center, Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang 830002, PR China
| | - Xuanxia Wu
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| | - Xiaoling Zhang
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| | - Zhaoxia Wang
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| | - Ling Zhou
- Medical Research and Transformation Center, People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Rd., Urumqi, Xinjiang 830001, PR China
| |
Collapse
|
14
|
Xie S, Zhang Y, Xu L, Li S, Shen X, Li L, Deng X, Zhou Y. Acacetin attenuates Streptococcus suis virulence by simultaneously targeting suilysin and inflammation. Microb Pathog 2021; 162:105354. [PMID: 34896203 DOI: 10.1016/j.micpath.2021.105354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/06/2021] [Accepted: 12/06/2021] [Indexed: 11/24/2022]
Abstract
Streptococcus suis (S. suis), an important zoonotic pathogenic bacterium, can cause multiple diseases and fatal infections in both humans and animals. The emergence of highly virulent and extensively drug-resistant strains of S. suis has raised questions about the efficacy of available therapeutic agents, thereby necessitating novel therapeutic strategies. Suilysin (SLY) is one of the most essential determinants of virulence for the pathogenicity of S. suis capsular type 2 (SS2). In addition, inhibiting the excessive inflammatory response is a strategy to reduce the damage caused by SS2 infection. In this study, we identified acacetin as an effective inhibitor of SLY, which inhibited the oligomerisation of SLY without affecting bacterial growth. Furthermore, the addition of 4-16 μg/ml acacetin to the co-infection system of the cells reduced S. suis-induced inflammation by downregulating the activation of the MAPK signalling pathway, thereby alleviating the S. suis-mediated cell injury. Thus, in addition to the conventional antibiotic therapy, acacetin represent a potential drug candidate and strategy for the treatment of S. suis infections as it simultaneously inhibited the haemolytic activity of SLY and downregulated the inflammatory response.
Collapse
Affiliation(s)
- Shengnan Xie
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yan Zhang
- Hospital of Stomatology, Jilin University, Changchun, 130021, China
| | - Lei Xu
- Hospital of Stomatology, Jilin University, Changchun, 130021, China
| | - Shufang Li
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xue Shen
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Li Li
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xuming Deng
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, China; Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yonglin Zhou
- Department of Respiratory Medicine, The First Hospital of Jilin University, Changchun, China; Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China.
| |
Collapse
|
15
|
Wang Q, Dong X, Zhang R, Zhao C. Flavonoids with Potential Anti-Amyloidogenic Effects as Therapeutic Drugs for Treating Alzheimer's Disease. J Alzheimers Dis 2021; 84:505-533. [PMID: 34569961 DOI: 10.3233/jad-210735] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease (AD) is a central neurodegenerative disease generally among the elderly; it accounts for approximately 50-75%of total cases of dementia patients and poses a serious threat to physical and mental health. Currently available treatments for AD mainly relieves its symptoms, and effective therapy is urgently needed. Deposition of amyloid-β protein in the brain is an early and invariant neuropathological feature of AD. Currently the main efforts in developing anti-AD drugs focus on anti-amyloidogenic therapeutics that prevent amyloid-β production or aggregation and decrease the occurrence of neurotoxic events. The results of an increasing number of studies suggest that natural extracts and phytochemicals have a positive impact on brain aging. Flavonoids belong to the broad group of polyphenols and recent data indicate a favorable effect of flavonoids on brain aging. In this review, we collect relevant discoveries from 1999 to 2021, discuss 75 flavonoids that effectively influence AD pathogenesis, and summarize their functional mechanisms in detail. The data we have reviewed show that, these flavonoids belong to various subclasses, including flavone, flavanone, biflavone, etc. Our results provide a reference for further study of the effects of flavonoids on AD and the progress of anti-AD therapy.
Collapse
Affiliation(s)
- Qixin Wang
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Xiaofang Dong
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Ran Zhang
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| | - Changqi Zhao
- Gene Engineering and Biotechnology Beijing Key Laboratory, College of Life Science, Beijing Normal University, Beijing, China
| |
Collapse
|
16
|
Mishig D, Gruner M, Lübken T, Ganbaatar C, Regdel D, Knölker HJ. Isolation and structure elucidation of pyridine alkaloids from the aerial parts of the Mongolian medicinal plant Caryopteris mongolica Bunge. Sci Rep 2021; 11:13740. [PMID: 34215777 PMCID: PMC8253738 DOI: 10.1038/s41598-021-93010-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/18/2021] [Indexed: 01/02/2023] Open
Abstract
The seven pyridine alkaloids 1–7, the flavonoid acacetin (8), and L-proline anhydride (9) have been isolated from the aerial parts of the Mongolian medicinal plant Caryopteris mongolica Bunge. The structures of the natural products 1–9 have been assigned by MS, as well as IR, 1D NMR (1H, 13C, DEPT), and 2D NMR (COSY, HSQC, HMBC, NOESY) spectroscopic methods. The compounds 2 and 4–7 represent new chemical structures. Acacetin (8) and L-proline anhydride (9) have been obtained from C. mongolica for the first time.
Collapse
Affiliation(s)
- Dumaa Mishig
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany.,Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar, 210351, Mongolia.,New Medical University, Sonsgolon road - 5/2, Ulaanbaatar, Mongolia
| | - Margit Gruner
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Tilo Lübken
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Chunsriimyatav Ganbaatar
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany.,Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar, 210351, Mongolia
| | - Duger Regdel
- Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar, 210351, Mongolia
| | - Hans-Joachim Knölker
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany.
| |
Collapse
|
17
|
Tsakiri EN, Gumeni S, Manola MS, Trougakos IP. Amyloid toxicity in a Drosophila Alzheimer's model is ameliorated by autophagy activation. Neurobiol Aging 2021; 105:137-147. [PMID: 34062489 DOI: 10.1016/j.neurobiolaging.2021.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/11/2021] [Accepted: 04/20/2021] [Indexed: 10/21/2022]
Abstract
Alzheimer's disease (AD) is the prevailing form of dementia. Protein degradation and antioxidant pathways have a critical role in preventing the accumulation of protein aggregation; thus, failure of proteostasis in neurons along with redox imbalance mark AD. Herein, we exploited an AD Drosophila model expressing human amyloid precursor (hAPP) and beta-secretase 1 (hBACE1) proteins, to better understand the role of proteostatic or antioxidant pathways in AD. Ubiquitous expression of hAPP, hBACE1 in flies caused more severe degenerative phenotypes versus neuronal targeted expression; it also, suppressed proteasome activity, increased oxidative stress and significantly enhanced stress-sensitivity. Overexpression of Prosβ5 proteasomal subunit or Nrf2 transcription factor in AD Drosophila flies partially restored proteasomal activity but did not rescue hAPP, hBACE1 induced neurodegeneration. On the other hand, expression of autophagy-related Atg8a in AD flies decelerated neurodegeneration, increased stress-resistance, and improved flies' health-/lifespan. Overall, our data suggest that the noxious effects of amyloid-beta aggregates can be alleviated by enhanced autophagy, thus dietary or pharmacological interventions that target autophagy should be considered in AD therapeutic approaches.
Collapse
Affiliation(s)
- Eleni N Tsakiri
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Sentiljana Gumeni
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Maria S Manola
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Ioannis P Trougakos
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 15784, Greece.
| |
Collapse
|
18
|
Kim JK, Park SU. Flavonoids for treatment of Alzheimer's disease: An up to date review. EXCLI JOURNAL 2021; 20:495-502. [PMID: 33883978 PMCID: PMC8056054 DOI: 10.17179/excli2021-3492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 01/17/2023]
Affiliation(s)
- Jae Kwang Kim
- Division of Life Sciences and Bio-Resource and Environmental Center, Incheon National University, Incheon 22012, Korea
| | - Sang Un Park
- Department of Crop Science and Department of Smart Agriculture Systems, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| |
Collapse
|
19
|
Fujihara K, Shimoyama T, Kawazu R, Sasaki H, Koyama K, Takahashi K, Kinoshita K. Amyloid β aggregation inhibitory activity of triterpene saponins from the cactus Stenocereus pruinosus. J Nat Med 2021; 75:284-298. [PMID: 33231837 PMCID: PMC7684148 DOI: 10.1007/s11418-020-01463-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 10/22/2020] [Indexed: 12/12/2022]
Abstract
Six new triterpene saponins (1-5,7) and 3 known saponins (6,8,9) were isolated from MeOH extracts of the cactus Stenocereus pruinosus. The structures of the isolated saponins were elucidated using MS, IR, and comprehensive NMR measurements. To develop drugs for treating Alzheimer's disease (AD) on the basis of the amyloid cascade hypothesis, the isolated saponins were evaluated for inhibition of BACE1 activity and amyloid beta (Aβ) aggregation using thioflavin-T assay, and triterpenes as an aglycone moiety and an alkaline hydrolysate of the saponins were also evaluated. One saponin, stenoside A (7), exhibited inhibitory activity related to Aβ aggregation and its degree of Aβ aggregation was 40.6% at 100 μM.
Collapse
Affiliation(s)
- Koji Fujihara
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Takuya Shimoyama
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Ryo Kawazu
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Hiroaki Sasaki
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Kiyotaka Koyama
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Kunio Takahashi
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan
| | - Kaoru Kinoshita
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan.
| |
Collapse
|
20
|
Strilbytska OM, Zayachkivska A, Koliada A, Galeotti F, Volpi N, Storey KB, Vaiserman A, Lushchak O. Anise Hyssop Agastache foeniculum Increases Lifespan, Stress Resistance, and Metabolism by Affecting Free Radical Processes in Drosophila. Front Physiol 2020; 11:596729. [PMID: 33391017 PMCID: PMC7772399 DOI: 10.3389/fphys.2020.596729] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/26/2020] [Indexed: 01/21/2023] Open
Abstract
Anise hyssop, Agastache foeniculum, is a widely used medicinal herb with known antioxidant properties. We studied how dietary supplementation with dried A. foeniculum leaf powder affected physiological and metabolic traits as well as activities of antioxidant enzymes and markers of oxidative stress in Drosophila melanogaster. Dietary hyssop extended the lifespan in a sex and genotype independent manner over a broad range of concentrations up to 30 mg/ml. Dietary supplementation with the herb significantly increased fecundity, resistance to oxidative stress and starvation. Higher transcript levels of Drosophila insulin-like peptide (dilp2) and decreased dilp3 and dilp6 transcripts together with increased levels of glycogen and triacylglycerols support an alteration of insulin signaling by the plant extract. Increased enzymatic activities of superoxide dismutase and aconitase as well as elevated protein and low molecular mass thiols also supported an alteration of free radical process in flies treated with dietary A. foeniculum leaf powder. Thus, physiological and metabolic traits as well as free radical processed may be affected by active compounds detected in extracts of anise hyssop leaves and contribute to the increased lifespan and reproductive (egg-laying) activity observed.
Collapse
Affiliation(s)
- Olha M Strilbytska
- Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
| | - Alina Zayachkivska
- Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
| | - Alexander Koliada
- D.F. Chebotarev Institute of Gerontology, National Academy of Medical Sciences (NAMS), Kyiv, Ukraine
| | - Fabio Galeotti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Nicola Volpi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Alexander Vaiserman
- D.F. Chebotarev Institute of Gerontology, National Academy of Medical Sciences (NAMS), Kyiv, Ukraine
| | - Oleh Lushchak
- Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
| |
Collapse
|
21
|
Neuroprotective effect of Salvia splendens extract and its constituents against AlCl3-induced Alzheimer’s disease in rats. ADVANCES IN TRADITIONAL MEDICINE 2020. [DOI: 10.1007/s13596-019-00421-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
Acacetin, a flavone with diverse therapeutic potential in cancer, inflammation, infections and other metabolic disorders. Food Chem Toxicol 2020; 145:111708. [PMID: 32866514 DOI: 10.1016/j.fct.2020.111708] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/11/2020] [Accepted: 08/22/2020] [Indexed: 01/04/2023]
Abstract
BACKGROUND Acacetin is a di-hydroxy and mono-methoxy flavone present in various plants, including black locust, Damiana, Silver birch. Literature information revealed that acacetin exhibits an array of pharmacological potential including chemopreventive and cytotoxic properties in cancer cell lines, prevents ischemia/reperfusion/myocardial infarction-induced cardiac injury, lipopolysaccharide (LPS), 1-methyl-4-phenyl pyridinium ion (MPP+) and 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine hydrochloride (MPTP)-induced neuroinflammation, LPS and sepsis-induced lung injury, rheumatoid and collagen-induced arthritis, inhibit the microbial growth, obesity, viral-mediated infections as well as hepatic protection. PURPOSE This review highlights the therapeutic potential of acacetin, with updated and comprehensive information on the biological sources, chemistry, and pharmacological properties along with the possible mechanism of action, safety aspects, and future research opportunities. STUDY DESIGN The information was retrieved from various search engines, including Pubmed, SciFinder, Science direct, Inxight:drugs, Google scholar, and Meta cyc. RESULT The first section of this review focuses on the detailed biological source of acacetin, chromatographic techniques used for isolation, chemical characteristics, the method for the synthesis of acacetin, and the available natural and synthetic derivatives. Subsequently, the pharmacological activities, including anti-cancer, anti-inflammatory, anti-viral, anti-microbial, anti-obesity, have been discussed. The pharmacokinetics data and toxicity profile of acacetin are also discussed. CONCLUSION Acacetin is a potent molecule reported for its strong anti-inflammatory and anti-cancer activity, however further scientific evidence is essential to validate its potency in disease models associated with inflammation and cancer. There is limited information available for toxicity profiling of acacetin; therefore, further studies would aid in establishing this natural flavone as a potent candidate for research studies at clinical setup.
Collapse
|
23
|
Pharmacological Treatment of Alzheimer's Disease: Insights from Drosophila melanogaster. Int J Mol Sci 2020; 21:ijms21134621. [PMID: 32610577 PMCID: PMC7370071 DOI: 10.3390/ijms21134621] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 01/01/2023] Open
Abstract
Aging is an ineluctable law of life. During the process of aging, the occurrence of neurodegenerative disorders is prevalent in the elderly population and the predominant type of dementia is Alzheimer’s disease (AD). The clinical symptoms of AD include progressive memory loss and impairment of cognitive functions that interfere with daily life activities. The predominant neuropathological features in AD are extracellular β-amyloid (Aβ) plaque deposition and intracellular neurofibrillary tangles (NFTs) of hyperphosphorylated Tau. Because of its complex pathobiology, some tangible treatment can only ameliorate the symptoms, but not prevent the disease altogether. Numerous drugs during pre-clinical or clinical studies have shown no positive effect on the disease outcome. Therefore, understanding the basic pathophysiological mechanism of AD is imperative for the rational design of drugs that can be used to prevent this disease. Drosophilamelanogaster has emerged as a highly efficient model system to explore the pathogenesis and treatment of AD. In this review we have summarized recent advancements in the pharmacological research on AD using Drosophila as a model species, discussed feasible treatment strategies and provided further reference for the mechanistic study and treatment of age-related AD.
Collapse
|
24
|
Genetic Dissection of Alzheimer's Disease Using Drosophila Models. Int J Mol Sci 2020; 21:ijms21030884. [PMID: 32019113 PMCID: PMC7037931 DOI: 10.3390/ijms21030884] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 01/26/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
Alzheimer’s disease (AD), a main cause of dementia, is the most common neurodegenerative disease that is related to abnormal accumulation of the amyloid β (Aβ) protein. Despite decades of intensive research, the mechanisms underlying AD remain elusive, and the only available treatment remains symptomatic. Molecular understanding of the pathogenesis and progression of AD is necessary to develop disease-modifying treatment. Drosophila, as the most advanced genetic model, has been used to explore the molecular mechanisms of AD in the last few decades. Here, we introduce Drosophila AD models based on human Aβ and summarize the results of their genetic dissection. We also discuss the utility of functional genomics using the Drosophila system in the search for AD-associated molecular mechanisms in the post-genomic era.
Collapse
|
25
|
Sinanoglou VJ, Kavga A, Strati IF, Sotiroudis G, Lantzouraki D, Zoumpoulakis P. Effects of Infrared Radiation on Eggplant ( Solanum melongena L.) Greenhouse Cultivation and Fruits' Phenolic Profile. Foods 2019; 8:foods8120630. [PMID: 31810218 PMCID: PMC6963297 DOI: 10.3390/foods8120630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/25/2019] [Accepted: 11/26/2019] [Indexed: 12/31/2022] Open
Abstract
The implementation of Infrared (IR) radiation in heated greenhouses possesses the advantage of high directional control and focused compensation of energy losses, appropriate for creating local microclimate conditions in highly energy-consuming systems, such as greenhouses. Moreover, it can efficiently maintain favorable environmental conditions at the plant canopy. The present study studies the application of Infrared (IR) heating in an experimental greenhouse with eggplant (Solanum melongena L.) cultivation. The experimental results are presented from a full cultivation period inside two identical, small scale experimental greenhouses, with IR and forced air heating system, respectively. The effects of IR heating over plant growth parameters, including the yield of the fruits as well as the total phenolic content and the antioxidant profile of eggplants fruits’ extracts are measured and discussed. The results indicate a greater uniformity production in the IR heating greenhouse in terms of antioxidant and radical scavenging activities, as well as the total phenolic content. Moreover, the phenolic profile of eggplant fruits from both greenhouses revealed the existence of numerous bioactive compounds, some of which were only characteristic of the eggplant fruits from IR heated greenhouses.
Collapse
Affiliation(s)
- Vassilia J. Sinanoglou
- Laboratory of Chemistry, Analysis & Design of Food Processes, Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece;
- Correspondence: (V.J.S.); (P.Z.); Tel.: +30-21-0538-5553 (V.J.S.); +30-21-0727-3853 (P.Z.)
| | - Angeliki Kavga
- Department of Agricultural Science, University of Patras, University Campus, 26504 Rio Patra, Greece;
| | - Irini F. Strati
- Laboratory of Chemistry, Analysis & Design of Food Processes, Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece;
| | - Georgios Sotiroudis
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., 11635 Athens, Greece; (G.S.); (D.L.)
| | - Dimitra Lantzouraki
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., 11635 Athens, Greece; (G.S.); (D.L.)
| | - Panagiotis Zoumpoulakis
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., 11635 Athens, Greece; (G.S.); (D.L.)
- Correspondence: (V.J.S.); (P.Z.); Tel.: +30-21-0538-5553 (V.J.S.); +30-21-0727-3853 (P.Z.)
| |
Collapse
|
26
|
Dhakal S, Kushairi N, Phan CW, Adhikari B, Sabaratnam V, Macreadie I. Dietary Polyphenols: A Multifactorial Strategy to Target Alzheimer's Disease. Int J Mol Sci 2019; 20:E5090. [PMID: 31615073 PMCID: PMC6834216 DOI: 10.3390/ijms20205090] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/11/2019] [Accepted: 10/11/2019] [Indexed: 02/06/2023] Open
Abstract
Ageing is an inevitable fundamental process for people and is their greatest risk factor for neurodegenerative disease. The ageing processes bring changes in cells that can drive the organisms to experience loss of nutrient sensing, disrupted cellular functions, increased oxidative stress, loss of cellular homeostasis, genomic instability, accumulation of misfolded protein, impaired cellular defenses and telomere shortening. Perturbation of these vital cellular processes in neuronal cells can lead to life threatening neurological disorders like Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Lewy body dementia, etc. Alzheimer's Disease is the most frequent cause of deaths in the elderly population. Various therapeutic molecules have been designed to overcome the social, economic and health care burden caused by Alzheimer's Disease. Almost all the chemical compounds in clinical practice have been found to treat symptoms only limiting them to palliative care. The reason behind such imperfect drugs may result from the inefficiencies of the current drugs to target the cause of the disease. Here, we review the potential role of antioxidant polyphenolic compounds that could possibly be the most effective preventative strategy against Alzheimer's Disease.
Collapse
Affiliation(s)
- Sudip Dhakal
- School of Science, RMIT University, Bundoora, Victoria 3083, Australia.
| | - Naufal Kushairi
- Mushroom Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia.
- Department of Anatomy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Chia Wei Phan
- Mushroom Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia.
- Department of Pharmaceutical Life Sciences, Faculty of Pharmacy, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Benu Adhikari
- School of Science, RMIT University, Bundoora, Victoria 3083, Australia.
| | - Vikineswary Sabaratnam
- Mushroom Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia.
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Ian Macreadie
- School of Science, RMIT University, Bundoora, Victoria 3083, Australia.
| |
Collapse
|
27
|
Blanco-Redondo B, Nuwal N, Kneitz S, Nuwal T, Halder P, Liu Y, Ehmann N, Scholz N, Mayer A, Kleber J, Kähne T, Schmitt D, Sadanandappa MK, Funk N, Albertova V, Helfrich-Förster C, Ramaswami M, Hasan G, Kittel RJ, Langenhan T, Gerber B, Buchner E. Implications of the Sap47 null mutation for synapsin phosphorylation, longevity, climbing proficiency and behavioural plasticity in adult Drosophila. ACTA ACUST UNITED AC 2019; 222:jeb.203505. [PMID: 31488622 DOI: 10.1242/jeb.203505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 08/29/2019] [Indexed: 12/18/2022]
Abstract
The Sap47 gene of Drosophila melanogaster encodes a highly abundant 47 kDa synaptic vesicle-associated protein. Sap47 null mutants show defects in synaptic plasticity and larval olfactory associative learning but the molecular function of Sap47 at the synapse is unknown. We demonstrate that Sap47 modulates the phosphorylation of another highly abundant conserved presynaptic protein, synapsin. Site-specific phosphorylation of Drosophila synapsin has repeatedly been shown to be important for behavioural plasticity but it was not known where these phospho-synapsin isoforms are localized in the brain. Here, we report the distribution of serine-6-phosphorylated synapsin in the adult brain and show that it is highly enriched in rings of synapses in the ellipsoid body and in large synapses near the lateral triangle. The effects of knockout of Sap47 or synapsin on olfactory associative learning/memory support the hypothesis that both proteins operate in the same molecular pathway. We therefore asked if this might also be true for other aspects of their function. We show that knockout of Sap47 but not synapsin reduces lifespan, whereas knockout of Sap47 and synapsin, either individually or together, affects climbing proficiency, as well as plasticity in circadian rhythms and sleep. Furthermore, electrophysiological assessment of synaptic properties at the larval neuromuscular junction (NMJ) reveals increased spontaneous synaptic vesicle fusion and reduced paired pulse facilitation in Sap47 and synapsin single and double mutants. Our results imply that Sap47 and synapsin cooperate non-uniformly in the control of synaptic properties in different behaviourally relevant neuronal networks of the fruitfly.
Collapse
Affiliation(s)
- Beatriz Blanco-Redondo
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany .,Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany.,Rudolf Schönheimer Institute of Biochemistry, Division of General Biochemistry, Leipzig University, 04103 Leipzig, Germany
| | - Nidhi Nuwal
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Susanne Kneitz
- Department of Physiological Chemistry, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Tulip Nuwal
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Partho Halder
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Yiting Liu
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Nadine Ehmann
- Department of Neurophysiology, Institute of Physiology, University of Würzburg, 97070 Würzburg, Germany.,Department of Animal Physiology, Institute of Biology, Leipzig University, 04103 Leipzig, Germany.,Carl-Ludwig-Institute for Physiology, Leipzig University, 04103 Leipzig, Germany
| | - Nicole Scholz
- Rudolf Schönheimer Institute of Biochemistry, Division of General Biochemistry, Leipzig University, 04103 Leipzig, Germany.,Department of Neurophysiology, Institute of Physiology, University of Würzburg, 97070 Würzburg, Germany
| | - Annika Mayer
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany
| | - Jörg Kleber
- Leibniz Institute of Neurobiology, 39118 Magdeburg, Germany
| | - Thilo Kähne
- Institute of Experimental Internal Medicine, Otto von Guericke University, 39120 Magdeburg, Germany
| | - Dominique Schmitt
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany
| | - Madhumala K Sadanandappa
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany.,National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, Karnataka 560065, India
| | - Natalja Funk
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Viera Albertova
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany.,Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Charlotte Helfrich-Förster
- Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| | - Mani Ramaswami
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, Karnataka 560065, India
| | - Gaiti Hasan
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, Karnataka 560065, India
| | - Robert J Kittel
- Department of Neurophysiology, Institute of Physiology, University of Würzburg, 97070 Würzburg, Germany.,Department of Animal Physiology, Institute of Biology, Leipzig University, 04103 Leipzig, Germany.,Carl-Ludwig-Institute for Physiology, Leipzig University, 04103 Leipzig, Germany
| | - Tobias Langenhan
- Rudolf Schönheimer Institute of Biochemistry, Division of General Biochemistry, Leipzig University, 04103 Leipzig, Germany.,Department of Neurophysiology, Institute of Physiology, University of Würzburg, 97070 Würzburg, Germany
| | - Bertram Gerber
- Leibniz Institute of Neurobiology, 39118 Magdeburg, Germany.,Institute of Biology, University of Magdeburg, 39120 Magdeburg, Germany.,Center for Behavioral Brain Sciences, 39106 Magdeburg, Germany
| | - Erich Buchner
- Institute of Clinical Neurobiology, University of Würzburg, 97078 Würzburg, Germany .,Department of Neurobiology and Genetics, Biocenter of the University of Würzburg, 97074 Würzburg, Germany
| |
Collapse
|
28
|
Evangelakou Z, Manola M, Gumeni S, Trougakos IP. Nutrigenomics as a tool to study the impact of diet on aging and age-related diseases: the Drosophila approach. GENES & NUTRITION 2019; 14:12. [PMID: 31073342 PMCID: PMC6498619 DOI: 10.1186/s12263-019-0638-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 04/10/2019] [Indexed: 02/06/2023]
Abstract
Aging is a complex phenomenon caused by the time-dependent loss of cellular homeodynamics and consequently of physiological organismal functions. This process is affected by both genetic and environmental (e.g., diet) factors, as well as by their constant interaction. Consistently, deregulation of nutrient sensing and signaling pathways is considered a hallmark of aging. Nutrigenomics is an emerging scientific discipline that studies changes induced by diet on the genome and thus it considers the intersection of three topics, namely health, diet, and genomics. Model organisms, such as the fruit fly Drosophila melanogaster, have been successfully used for in vivo modeling of higher metazoans aging and for nutrigenomic studies. Drosophila is a well-studied organism with sophisticated genetics and a fully annotated sequenced genome, in which ~ 75% of human disease-related genes have functional orthologs. Also, flies have organs/tissues that perform the equivalent functions of most mammalian organs, while discrete clusters of cells maintain insect carbohydrate homeostasis in a way similar to pancreatic cells. Herein, we discuss the mechanistic connections between nutrition and aging in Drosophila, and how this model organism can be used to study the effect of different diets (including natural products and/or their derivatives) on higher metazoans longevity.
Collapse
Affiliation(s)
- Zoi Evangelakou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Maria Manola
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Sentiljana Gumeni
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Ioannis P. Trougakos
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| |
Collapse
|
29
|
Bu J, Shi S, Wang HQ, Niu XS, Zhao ZF, Wu WD, Zhang XL, Ma Z, Zhang YJ, Zhang H, Zhu Y. Acacetin protects against cerebral ischemia-reperfusion injury via the NLRP3 signaling pathway. Neural Regen Res 2019; 14:605-612. [PMID: 30632500 PMCID: PMC6352603 DOI: 10.4103/1673-5374.247465] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Acacetin (5,7-dihydroxy-4'-methoxyflavone), a potential neuroprotective agent, has an inhibitory effect on lipopolysaccharide-induced neuroinflammatory reactions. However, whether acacetin has an effect on inflammatory corpuscle 3 (NLRP3) after cerebral ischemia-reperfusion injury has not been fully determined. This study used an improved suture method to establish a cerebral ischemia-reperfusion injury model in C57BL/6 mice. After ischemia with middle cerebral artery occlusion for 1 hour, reperfusion with intraperitoneal injection of 25 mg/kg of acacetin (acacetin group) or an equal volume of saline (0.1 mL/10 g, middle cerebral artery occlusion group) was used to investigate the effect of acacetin on cerebral ischemia-reperfusion injury. Infarct volume and neurological function scores were determined by 2,3,5-triphenyltetrazolium chloride staining and the Zea-Longa scoring method. Compared with the middle cerebral artery occlusion group, neurological function scores and cerebral infarction volumes were significantly reduced in the acacetin group. To understand the effect of acacetin on microglia-mediated inflammatory response after cerebral ischemia-reperfusion injury, immunohistochemistry for the microglia marker calcium adapter protein ionized calcium-binding adaptor molecule 1 (Iba1) was examined in the hippocampus of ischemic brain tissue. In addition, tumor necrosis factor-α, interleukin-1β, and interleukin-6 expression in ischemic brain tissue of mice was quantified by enzyme-linked immunosorbent assay. Expression of Iba1, tumor necrosis factor-α, interleukin-1β and interleukin-6 was significantly lower in the acacetin group compared with the middle cerebral artery occlusion group. Western blot assay results showed that expression of Toll-like receptor 4, nuclear factor kappa B, NLRP3, procaspase-1, caspase-1, pro-interleukin-1β, and interleukin-1β were significantly lower in the acacetin group compared with the middle cerebral artery occlusion group. Our findings indicate that acacetin has a protective effect on cerebral ischemia-reperfusion injury, and its mechanism of action is associated with inhibition of microglia-mediated inflammation and the NLRP3 signaling pathway.
Collapse
Affiliation(s)
- Juan Bu
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Shen Shi
- Laboratory Animal Research Center, Center for Disease Control and Prevention, Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Hui-Qin Wang
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Xiao-Shan Niu
- Department of Neurology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Zong-Feng Zhao
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Wei-Dong Wu
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Xiao-Ling Zhang
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Zhi Ma
- Department of Neurology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Yan-Jun Zhang
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Hui Zhang
- Clinical Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| | - Yi Zhu
- Department of Neurology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang Uygur Autonomous Region, China
| |
Collapse
|
30
|
Bakoyiannis I, Daskalopoulou A, Pergialiotis V, Perrea D. Phytochemicals and cognitive health: Are flavonoids doing the trick? Biomed Pharmacother 2018; 109:1488-1497. [PMID: 30551400 DOI: 10.1016/j.biopha.2018.10.086] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 10/13/2018] [Accepted: 10/14/2018] [Indexed: 12/27/2022] Open
Abstract
Flavonoids constitute a large group of polyphenolic compounds with numerous effects on behaviour and cognition. These effects vary from learning and memory enhancement to an improvement of general cognition. Furthermore, flavonoids have been implicated in a) neuronal proliferation and survival, by acting on a variety of cellular signalling cascades, including the ERK/CREB/BDNF and PI3K/Akt pathway, b) oxidative stress reduction and c) relief from Alzheimer's disease-type symptoms. From an electrophysiological aspect, they promote long term potentiation in the hippocampus, supporting the hypothesis of synaptic plasticity mediation. Together, these actions reveal a neuroprotective effect of flavonoid compounds in the brain. Therefore, flavonoid intake could be a potential clinical direction for prevention and/or attenuation of cognitive decline deterioration which accompanies various brain disorders. The purpose of the current review paper was to summarise all these effects on cognition, describe the possible pathways via which they may act on a cellular level and provide a better picture for future research towards this direction.
Collapse
Affiliation(s)
- Ioannis Bakoyiannis
- Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, National and Kapodistrian University of Athens, Medical School, Greece.
| | - Afrodite Daskalopoulou
- Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, National and Kapodistrian University of Athens, Medical School, Greece
| | - Vasilios Pergialiotis
- Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, National and Kapodistrian University of Athens, Medical School, Greece
| | - Despina Perrea
- Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, National and Kapodistrian University of Athens, Medical School, Greece
| |
Collapse
|
31
|
Abstract
The human β-site amyloid cleaving enzyme (BACE1) has been considered as an effective drug target for treatment of Alzheimer’s disease (AD). In this study, Urechis unicinctus (U. unicinctus), which is a Far East specialty food known as innkeeper worm, ethanol extract was studied by bioassay-directed fractionation and isolation to examine its potential β-site amyloid cleaving enzyme inhibitory and antimicrobial activity. The following compounds were characterized: hecogenin, cholest-4-en-3-one, cholesta-4,6-dien-3-ol, and hurgadacin. These compounds were identified by their mass spectrometry, 1H, and 13C NMR spectral data, comparing those data with NIST/EPA/NIH Mass spectral database (NIST11) and published values. Hecogenin and cholest-4-en-3-one showed significant inhibitory activity against BACE1 with EC50 values of 116.3 and 390.6 µM, respectively. Cholesta-4,6-dien-3-ol and hurgadacin showed broad spectrum antimicrobial activity, particularly strongly against Escherichia coli (E. coli), Salmonella enterica (S. enterica), Pasteurella multocida (P. multocida), and Physalospora piricola (P. piricola), with minimal inhibitory concentration (MIC) ranging from 0.46 to 0.94 mg/mL. This is the first report regarding those four known compounds that were isolated from U. unicinctus and their anti-BACE1 and antimicrobial activity, highlighting the fact that known natural compounds may be a critical source of new medicine leads. These findings provide scientific evidence for potential application of those bioactive compounds for the development of AD drugs and antimicrobial agents.
Collapse
|
32
|
Liu QF, Jeon Y, Sung YW, Lee JH, Jeong H, Kim YM, Yun HS, Chin YW, Jeon S, Cho KS, Koo BS. Nardostachys jatamansi Ethanol Extract Ameliorates Aβ42 Cytotoxicity. Biol Pharm Bull 2018; 41:470-477. [DOI: 10.1248/bpb.b17-00750] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Quan Feng Liu
- Department of Oriental Medicine, Dongguk University
- Department of Oriental Neuropsychiatry, Graduate School of Oriental Medicine, Dongguk University
| | - Youngjae Jeon
- Department of Biological Sciences, Konkuk University
| | - Yung-wei Sung
- Department of Oriental Medicine, Dongguk University
- Department of Oriental Neuropsychiatry, Graduate School of Oriental Medicine, Dongguk University
| | - Jang Ho Lee
- Department of Biological Sciences, Konkuk University
| | - Haemin Jeong
- Department of Biological Sciences, Konkuk University
| | - Young-Mi Kim
- College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul
| | - Hye Sup Yun
- Department of Biological Sciences, Konkuk University
| | - Young-Won Chin
- College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul
| | - Songhee Jeon
- Dongguk University Research Institute of Biotechnology, Dongguk University
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists at Chonnam National University
| | | | - Byung-Soo Koo
- Department of Oriental Medicine, Dongguk University
- Department of Oriental Neuropsychiatry, Graduate School of Oriental Medicine, Dongguk University
| |
Collapse
|
33
|
Acacetin inhibits neuronal cell death induced by 6-hydroxydopamine in cellular Parkinson's disease model. Bioorg Med Chem Lett 2017; 27:5207-5212. [PMID: 29089232 DOI: 10.1016/j.bmcl.2017.10.048] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 11/21/2022]
Abstract
Acacetin (5,7-dihydroxy-4'-methoxyflavone), a flavonoid compound isolated from Flos Chrysanthemi Indici, chrysanthemum, safflower, and Calamintha and Linaria species has been shown to have anti-cancer activity, indicating its potential clinical value in cancer treatment. In this study, we sought to study the potentials of acacetin in preventing human dopaminergic neuronal death via inhibition of 6-hydroxydopamine (6-OHDA)-induced neuronal cell death in the SH-SY5Y cells. Our results suggest that acacetin was effective in preventing 6-OHDA-induced neuronal cell death through regulation of mitochondrial-mediated cascade apoptotic cell death. Pretreatment with acacetin significantly inhibited neurotoxicity and neuronal cell death through reactive oxygen species (ROS) production and mitochondrial membrane potential (MMP) dysfunction. Acacetin also markedly acted on key molecules in apoptotic cell death pathways and reduced phosphorylation of c-Jun N-terminal kinase (JNK), p38 mitogen-activated protein kinase (MAPK), phosphatidylinositol 3-kinases (PI3K)/Akt, and glycogen synthase kinase-3beta (GSK-3β). These results suggested that acacetin could inhibit 6-OHDA-induced neuronal cell death originating from ROS-mediated cascade apoptosis pathway. Thus, the results of our study suggest that acacetin is a potent therapeutic agent for PD progression.
Collapse
|
34
|
Ding AJ, Zheng SQ, Huang XB, Xing TK, Wu GS, Sun HY, Qi SH, Luo HR. Current Perspective in the Discovery of Anti-aging Agents from Natural Products. NATURAL PRODUCTS AND BIOPROSPECTING 2017; 7:335-404. [PMID: 28567542 PMCID: PMC5655361 DOI: 10.1007/s13659-017-0135-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 05/16/2017] [Indexed: 05/18/2023]
Abstract
Aging is a process characterized by accumulating degenerative damages, resulting in the death of an organism ultimately. The main goal of aging research is to develop therapies that delay age-related diseases in human. Since signaling pathways in aging of Caenorhabditis elegans (C. elegans), fruit flies and mice are evolutionarily conserved, compounds extending lifespan of them by intervening pathways of aging may be useful in treating age-related diseases in human. Natural products have special resource advantage and with few side effect. Recently, many compounds or extracts from natural products slowing aging and extending lifespan have been reported. Here we summarized these compounds or extracts and their mechanisms in increasing longevity of C. elegans or other species, and the prospect in developing anti-aging medicine from natural products.
Collapse
Affiliation(s)
- Ai-Jun Ding
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Shan-Qing Zheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Xiao-Bing Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Ti-Kun Xing
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Gui-Sheng Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- Key Laboratory for Aging and Regenerative Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Hua-Ying Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Shu-Hua Qi
- Guangdong Key Laboratory of Marine Material Medical, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, Guangdong, China
| | - Huai-Rong Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
- Key Laboratory for Aging and Regenerative Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China.
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, 134 Lanhei Road, Kunming, 650201, Yunnan, China.
| |
Collapse
|
35
|
Quantification of Antioxidant Phenolic Compounds in a New Chrysanthemum Cultivar by High-Performance Liquid Chromatography with Diode Array Detection and Electrospray Ionization Mass Spectrometry. Int J Anal Chem 2017. [PMID: 28630625 PMCID: PMC5463162 DOI: 10.1155/2017/1254721] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The flowers of Chrysanthemum morifolium Ramat. have been used as an herbal tea and in traditional medicine, and the plant has been developed to produce horticultural cultivars of various colors and shapes. In this study, a new chrysanthemum cultivar with dark purple petals (C. morifolium cv. ARTI-Dark Chocolate; ADC) was developed by radiation-induced mutation breeding of its original cultivar with purple striped white petals (C. morifolium cv. Noble Wine, NW). The phenolic profile and antioxidant property of ADC were investigated and compared with NW and the commercially available medicinal herb, C. morifolium with yellow petals (CM), in order to find a scientific support to produce a new source of natural antioxidant. Flavonoid and phenolic acid profiles of the ethanol extracts of the three flowers were analyzed by high-performance liquid chromatography-diode array detector-electrospray ionization mass spectrometry (HPLC-DAD-ESIMS), while antioxidant properties were evaluated using the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assay. Among the tested flowers, ADC possessed the strongest antioxidant capacity and the highest phenolic contents. Flavonoids (acacetin, apigenin, luteolin, acacetin-7-O-β-glucoside, apigenin-7-O-β-glucoside, luteolin-7-O-β-glucoside, and linarin) and phenolic acids (chlorogenic acid and mixture of 1,4-, 1,5-, and 3,5-dicaffeoylquinic acids) were identified and quantified.
Collapse
|
36
|
Chaurasiya ND, Gogineni V, Elokely KM, León F, Núñez MJ, Klein ML, Walker LA, Cutler SJ, Tekwani BL. Isolation of Acacetin from Calea urticifolia with Inhibitory Properties against Human Monoamine Oxidase-A and -B. JOURNAL OF NATURAL PRODUCTS 2016; 79:2538-2544. [PMID: 27754693 DOI: 10.1021/acs.jnatprod.6b00440] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Calea urticifolia (Asteraceae: Asteroideae) has long been used as a traditional medicine in El Salvador to treat arthritis and fever, among other illnesses. The chloroform extract of the leaves of C. urticifolia showed potent inhibition of recombinant human monoamine oxidases (MAO-A and -B). Further bioassay-guided fractionation led to the isolation of a flavonoid, acacetin, as the most prominent MAO inhibitory constituent, with IC50 values of 121 and 49 nM for MAO-A and -B, respectively. The potency of MAO inhibition by acacetin was >5-fold higher for MAO-A (0.121 μM vs 0.640 μM) and >22-fold higher for MAO-B (0.049 μM vs 1.12 μM) as compared to apigenin, the closest flavone structural analogue. Interaction and binding characteristics of acacetin with MAO-A and -B were determined by enzyme-kinetic assays, enzyme-inhibitor complex binding, equilibrium-dialysis dissociation analyses, and computation analysis. Follow-up studies showed reversible binding of acacetin with human MAO-A and -B, resulting in competitive inhibition. Acacetin showed more preference toward MAO-B than to MAO-A, suggesting its potential for eliciting selective pharmacological effects that might be useful in the treatment of neurological and psychiatric disorders. In addition, the binding modes of acacetin at the enzymatic site of MAO-A and -B were predicted through molecular modeling algorithms, illustrating the high importance of ligand interaction with negative and positive free energy regions of the enzyme active site.
Collapse
Affiliation(s)
| | | | - Khaled M Elokely
- Institute for Computational Molecular Science and Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
- Department of Pharmaceutical Chemistry, Tanta University , Tanta 31527, Egypt
| | | | - Marvin J Núñez
- Laboratorio de Investigación en Productos Naturales, Facultad de Química y Farmacia, University of El Salvador , San Salvador, El Salvador
| | - Michael L Klein
- Institute for Computational Molecular Science and Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
| | | | | | | |
Collapse
|