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Niu C, Dong M, Niu Y. Natural polyphenol: Their pathogenesis-targeting therapeutic potential in Alzheimer's disease. Eur J Med Chem 2024; 269:116359. [PMID: 38537514 DOI: 10.1016/j.ejmech.2024.116359] [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: 04/09/2023] [Revised: 03/17/2024] [Accepted: 03/24/2024] [Indexed: 04/07/2024]
Abstract
Alzheimer's disease (AD) is a detrimental neurodegenerative disease affecting the elderly. Clinically, it is characterized by progressive memory decline and subsequent loss of broader cognitive functions. Current drugs provide only symptomatic relief but do not have profound disease-modifying effects. There is an unmet need to identify novel pharmacological agents for AD therapy. Neuropathologically, the characteristic hallmarks of the disease are extracellular senile plaques containing amyloid β-peptides and intracellular neurofibrillary tangles containing hyperphosphorylated microtubule-associated protein tau. Simultaneously, oxidative stress, neuroinflammation and mitochondrial dysfunction in specific brain regions are early events during the process of AD pathologic changes and are associated with Aβ/tau toxicity. Here, we first summarized probable pathogenic mechanisms leading to neurodegeneration and hopefully identify pathways that serve as specific targets to improve therapy for AD. We then reviewed the mechanisms that underlie disease-modifying effects of natural polyphenols, with a focus on nuclear factor erythroid 2-related factor 2 activators for AD treatment. Lastly, we discussed challenges in the preclinical to clinical translation of natural polyphenols. In conclusion, there is evidence that natural polyphenols can be therapeutically useful in AD through their multifaceted mechanism of action. However, more clinical studies are needed to confirm these effects.
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Affiliation(s)
- Chengu Niu
- Internal Medicine Residency Program, Rochester General Hospital, Rochester, NY, 14621, USA
| | - Miaoxian Dong
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, 161006, China
| | - Yingcai Niu
- The Institute of Medicine, Qiqihar Medical University, Qiqihar, 161006, China.
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Li X, Sun T, Liu J, Wei S, Yang Y, Liu J, Zhang B, Li W. Phloretin alleviates doxorubicin-induced cardiotoxicity through regulating Hif3a transcription via targeting transcription factor Fos. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 120:155046. [PMID: 37659297 DOI: 10.1016/j.phymed.2023.155046] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 08/15/2023] [Accepted: 08/24/2023] [Indexed: 09/04/2023]
Abstract
BACKGROUND Doxorubicin (Dox), a chemotherapeutic agent known for its efficacy, has been associated with the development of severe cardiotoxicity, commonly referred to as doxorubicin-induced cardiotoxicity (DIC). The role and mechanism of action of phloretin (Phl) in cardiovascular diseases are well-established; however, its specific function and underlying mechanism in the context of DIC have yet to be fully elucidated. OBJECTIVE This research aimed to uncover the protective effect of Phl against DIC in vivo and in vitro, while also providing a comprehensive understanding of the underlying mechanisms involved. METHODS DIC cell and murine models were established. The action targets and mechanism of Phl against DIC were comprehensively examined by systematic network pharmacology, molecular docking, transcriptomics technologies, transcription factor (TF) prediction, and experimental validation. RESULTS Phl relieved Dox-induced cell apoptosis in vitro and in vivo. Through network pharmacology analysis, a total of 554 co-targeted genes of Phl and Dox were identified. Enrichment analysis revealed several key pathways including the PI3K-Akt signaling pathway, Apoptosis, and the IL-17 signaling pathway. Protein-protein interaction (PPI) analysis identified 24 core co-targeted genes, such as Fos, Jun, Hif1a, which were predicted to bind well to Phl based on molecular docking. Transcriptomics analysis was performed to identify the top 20 differentially expressed genes (DEGs), and 202 transcription factors (TFs) were predicted for these DEGs. Among these TFs, 10 TFs (Fos, Jun, Hif1a, etc.) are also the co-targeted genes, and 3 TFs (Fos, Jun, Hif1a) are also the core co-targeted genes. Further experiments validated the finding that Phl reduced the elevated levels of Hif3a (one of the top 20 DEGs) and Fos (one of Hif3a's predicted TFs) induced by Dox. Moreover, the interaction between Fos protein and the Hif3a promoter was confirmed through luciferase reporter assays. CONCLUSION Phl actively targeted and down-regulated the Fos protein to inhibit its binding to the promoter region of Hif3a, thereby providing protection against DIC.
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Affiliation(s)
- Xiangyun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China; School of Pharmacy, Central South University, Changsha, Hunan 410078, China
| | - Taoli Sun
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China
| | - Jiaqin Liu
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China
| | - Shanshan Wei
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China
| | - Yuanying Yang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China
| | - Jian Liu
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China
| | - Bikui Zhang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China; School of Pharmacy, Central South University, Changsha, Hunan 410078, China.
| | - Wenqun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha, Hunan 410011, China.
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Deshpande RD, Shah DS, Gurram S, Jha DK, Batabyal P, Amin PD, Sathaye S. Formulation, characterization, pharmacokinetics and antioxidant activity of phloretin oral granules. Int J Pharm 2023; 645:123386. [PMID: 37678475 DOI: 10.1016/j.ijpharm.2023.123386] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/10/2023] [Accepted: 09/05/2023] [Indexed: 09/09/2023]
Abstract
Phloretin (PHL), a flavonoid of the dihydrogen chalcone class, is reported to have low oral bioavailability due to its poor solubility and absorption. A common approach to enhance the solubility of such flavonoids is solubilization in a polymeric or lipidic matrix which would help in enhance dissolution rate and solubility. Accordingly, in the current study PHL was dissolved in Gelucire® 44/14 by melt-fusion technique and the viscous semisolid melt was adsorbed on a solid carrier to obtain free flowing granules. SeDeM-SLA (Solid-Liquid Adsorption) expert system was employed to select the most suitable carrier. This study achieved positive outcomes through the successful development of formulated oral PHL granules. The granules exhibited good stability, and favourable pharmacokinetic properties. In addition, the selected carrier effectively retained the antioxidant properties of PHL.
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Affiliation(s)
- Radni D Deshpande
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Devanshi S Shah
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Sharda Gurram
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Durgesh K Jha
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Paramita Batabyal
- DBT-ICT Centre for Energy Biosciences, Institute of Chemical Technology, Mumbai, India
| | - Purnima D Amin
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India
| | - Sadhana Sathaye
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai, India.
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Coria-Lucero C, Castro A, Ledezma C, Leporatti J, Ramirez D, Ghersi M, Delgado SM, Anzulovich AC, Navigatore-Fonzo L. An intracerebroventricular injection of AΒ (1-42) modifies temporal profiles of spatial memory performance and oxidative status in the temporal cortex rat. Brain Res 2023; 1804:148242. [PMID: 36646367 DOI: 10.1016/j.brainres.2023.148242] [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: 10/16/2022] [Revised: 12/26/2022] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
Alzheimer's dementia (AD) is a neurodegenerative disorder that causes memory loss and dementia in older adults. Intracellular accumulation of Aβ causes an imbalance in the oxidative status and cognitive dysfunctions. Besides oxidative stress and loss of memory, Alzheimer's patients show dysfunction of the circadian rhythms. The objective of this work was to evaluate the consequences of an intracerebroventricular injection of Aβ (1-42) on temporal patterns of cognitive performance, as well as on lipid peroxidation, protein oxidation and total antioxidant capacity levels, in the rat temporal cortex. Holtzman male rats from control and Aβ-injected groups were used in this study. We found that MDA, protein carbonyls and total antioxidant capacity levels displayed day-night oscillations in the rat temporal cortex and spatial memory performance also varied rhythmically. An intracerebroventricular injection of Aβ (1-42) modified temporal patterns of cognitive performance as well as daily profiles of parameters of oxidative stress. Thus, elevated levels of Aβ aggregates induces alterations in daily rhythmicity of parameters of oxidative stress and, consequently, would affect cellular clock activity, affecting the spatial memory performance in the AD.
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Affiliation(s)
- Cinthia Coria-Lucero
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina
| | - Andrea Castro
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina
| | - Carina Ledezma
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina
| | - Jorge Leporatti
- Faculty of Economic, Legal and Social Sciences, National University of San Luis, Campus Universitario, Ruta Prov. N° 55 (Ex. 148) Extremo Norte, D5700HHW San Luis, Argentina
| | - Darío Ramirez
- Laboratory of Experimental & Translational Medicine (LME&T), Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina
| | - Marisa Ghersi
- Institute of Experimental Pharmacology of Córdoba, Faculty of Chemical Sciences, National University of Córdoba (IFEC), CONICET, Haya De La Torre y Medina Allende S/N, CP D5000HHW Córdoba, Argentina
| | - Silvia Marcela Delgado
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina.
| | - Ana Cecilia Anzulovich
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina.
| | - Lorena Navigatore-Fonzo
- Chronobiology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis. Multidisciplinary Institute of Biological Research of San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW San Luis, Argentina.
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The Molecular Pharmacology of Phloretin: Anti-Inflammatory Mechanisms of Action. Biomedicines 2023; 11:biomedicines11010143. [PMID: 36672652 PMCID: PMC9855955 DOI: 10.3390/biomedicines11010143] [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: 12/01/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023] Open
Abstract
The isolation of phlorizin from the bark of an apple tree in 1835 led to a flurry of research on its inhibitory effect on glucose transporters in the intestine and kidney. Using phlorizin as a prototype drug, antidiabetic agents with more selective inhibitory activity towards glucose transport at the kidney have subsequently been developed. In contrast, its hydrolysis product in the body, phloretin, which is also found in the apple plant, has weak antidiabetic properties. Phloretin, however, displays a range of pharmacological effects including antibacterial, anticancer, and cellular and organ protective properties both in vitro and in vivo. In this communication, the molecular basis of its anti-inflammatory mechanisms that attribute to its pharmacological effects is scrutinised. These include inhibiting the signalling pathways of inflammatory mediators' expression that support its suppressive effect in immune cells overactivation, obesity-induced inflammation, arthritis, endothelial, myocardial, hepatic, renal and lung injury, and inflammation in the gut, skin, and nervous system, among others.
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Dihydrochalcones in Sweet Tea: Biosynthesis, Distribution and Neuroprotection Function. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248794. [PMID: 36557927 PMCID: PMC9782792 DOI: 10.3390/molecules27248794] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Sweet tea is a popular herbal drink in southwest China, and it is usually made from the shoots and tender leaves of Lithocarpus litseifolius. The sweet taste is mainly attributed to its high concentration of dihydrochalcones. The distribution and biosynthesis of dihydrochaldones in sweet tea, as well as neuroprotective effects in vitro and in vivo tests, are reviewed in this paper. Dihydrochalones are mainly composed of phloretin and its glycosides, namely, trilobatin and phloridzin, and enriched in tender leaves with significant geographical specificity. Biosynthesis of the dihydrochalones follows part of the phenylpropanoid and a branch of flavonoid metabolic pathways and is regulated by expression of the genes, including phenylalanine ammonia-lyase, 4-coumarate: coenzyme A ligase, trans-cinnamic acid-4-hydroxylase and hydroxycinnamoyl-CoA double bond reductase. The dihydrochalones have been proven to exert a significant neuroprotective effect through their regulation against Aβ deposition, tau protein hyperphosphorylation, oxidative stress, inflammation and apoptosis.
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7
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Chen Y, Peng F, Xing Z, Chen J, Peng C, Li D. Beneficial effects of natural flavonoids on neuroinflammation. Front Immunol 2022; 13:1006434. [PMID: 36353622 PMCID: PMC9638012 DOI: 10.3389/fimmu.2022.1006434] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/03/2022] [Indexed: 12/05/2022] Open
Abstract
Neuroinflammation is the fundamental immune response against multiple factors in the central nervous system and is characterized by the production of inflammatory mediators, activated microglia and astrocytes, and the recruitment of innate and adaptive immune cells to inflammatory sites, that contributes to the pathological process of related brain diseases, such as Alzheimer’s disease, Parkinson’s disease, depression, and stroke. Flavonoids, as a species of important natural compounds, have been widely revealed to alleviate neuroinflammation by inhibiting the production of pro-inflammatory mediators, elevating the secretion of anti-inflammatory factors, and modulating the polarization of microglia and astrocyte, mainly via suppressing the activation of NLRP3 inflammasome, as well as NF-κB, MAPK, and JAK/STAT pathways, promoting Nrf2, AMPK, BDNF/CREB, Wnt/β-Catenin, PI3k/Akt signals and SIRT1-mediated HMGB1 deacetylation. This review will provide the latest and comprehensive knowledge on the therapeutic benefits and mechanisms of natural flavonoids in neuroinflammation, and the natural flavonoids might be developed into food supplements or lead compounds for neuroinflammation-associated brain disorders.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fu Peng
- Department of Pharmacology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Ziwei Xing
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Junren Chen
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Cheng Peng, ; Dan Li,
| | - Dan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Cheng Peng, ; Dan Li,
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Nakhate KT, Badwaik H, Choudhary R, Sakure K, Agrawal YO, Sharma C, Ojha S, Goyal SN. Therapeutic Potential and Pharmaceutical Development of a Multitargeted Flavonoid Phloretin. Nutrients 2022; 14:nu14173638. [PMID: 36079895 PMCID: PMC9460114 DOI: 10.3390/nu14173638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Phloretin is a flavonoid of the dihydrogen chalcone class, present abundantly in apples and strawberries. The beneficial effects of phloretin are mainly associated with its potent antioxidant properties. Phloretin modulates several signaling pathways and molecular mechanisms to exhibit therapeutic benefits against various diseases including cancers, diabetes, liver injury, kidney injury, encephalomyelitis, ulcerative colitis, asthma, arthritis, and cognitive impairment. It ameliorates the complications associated with diabetes such as cardiomyopathy, hypertension, depression, memory impairment, delayed wound healing, and peripheral neuropathy. It is effective against various microbial infections including Salmonella typhimurium, Listeria monocytogenes, Mycobacterium tuberculosis, Escherichia coli, Candida albicans and methicillin-resistant Staphylococcus aureus. Considering the therapeutic benefits, it generated interest for the pharmaceutical development. However, poor oral bioavailability is the major drawback. Therefore, efforts have been undertaken to enhance its bioavailability by modifying physicochemical properties and molecular structure, and developing nanoformulations. In the present review, we discussed the pharmacological actions, underlying mechanisms and molecular targets of phloretin. Moreover, the review provides insights into physicochemical and pharmacokinetic characteristics, and approaches to promote the pharmaceutical development of phloretin for its therapeutic applications in the future. Although convincing experimental data are reported, human studies are not available. In order to ascertain its safety, further preclinical studies are needed to encourage its pharmaceutical and clinical development.
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Affiliation(s)
- Kartik T. Nakhate
- Department of Pharmacology, Shri Vile Parle Kelavani Mandal’s Institute of Pharmacy, Dhule 424001, Maharashtra, India
| | - Hemant Badwaik
- Department of Pharmaceutical Chemistry, Shri Shankaracharya Institute of Pharmaceutical Sciences and Research, Bhilai 490020, Chhattisgarh, India
| | - Rajesh Choudhary
- Department of Pharmacology, Shri Shankaracharya College of Pharmaceutical Sciences, Bhilai 490020, Chhattisgarh, India
| | - Kalyani Sakure
- Department of Pharmaceutics, Rungta College of Pharmaceutical Sciences and Research, Bhilai 490024, Chhattisgarh, India
| | - Yogeeta O. Agrawal
- Department of Pharmaceutics, Shri Vile Parle Kelavani Mandal’s Institute of Pharmacy, Dhule 424001, Maharashtra, India
| | - Charu Sharma
- Department of Internal Medicine, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Shreesh Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
- Correspondence: (S.O.); (S.N.G.)
| | - Sameer N. Goyal
- Department of Pharmacology, Shri Vile Parle Kelavani Mandal’s Institute of Pharmacy, Dhule 424001, Maharashtra, India
- Correspondence: (S.O.); (S.N.G.)
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Therapeutic Effects of High-Intensity Interval Training Exercise Alone and Its Combination with Ecdysterone Against Amyloid Beta-Induced Rat Model of Alzheimer's Disease: A Behavioral, Biochemical, and Histological Study. Neurochem Res 2022; 47:2090-2108. [PMID: 35484426 DOI: 10.1007/s11064-022-03603-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 03/18/2022] [Accepted: 04/08/2022] [Indexed: 12/15/2022]
Abstract
Hippocampal oxidative stress has a vital role in the pathophysiology of Alzheimer's disease (AD)-associated behavioral deficits. Ecdysterone (Ecdy), a natural product and primary steroid hormone, exhibits anti-oxidative and neuroprotective effects. High-intensity interval training (HIIT) has emerged as an effective method for improving physiological brain functions. The present study was designed to investigate the comparative effects of separate and combined HIIT and Ecdy treatment on behavioral functions, hippocampal oxidative status, histological changes in an amyloid-beta (Aβ)-induced rat model of AD. Adult male rats were treated simultaneously with HIIT exercise and Ecdy (10 mg/kg/day; P.O.), starting ten days after Aβ-injection, and they continued for eight consecutive weeks. At the end of the treatment course, the behavioral functions of the rats were assessed by commonly-used behavioral paradigms. Subsequently, brain samples were collected for histological analysis and hippocampus samples were collected for biochemical analysis. Results illustrated that Aβ injection impaired learning and memory performances in both novel object recognition and Barnes maze tests, reduced exploratory/locomotor activities in open field test, enhanced anxiety-like behavior in elevated plus-maze (P < 0.05). These behavioral deficits accompanied hippocampal oxidative stress (decreased total antioxidant capacity content and glutathione peroxidase enzyme activity, increased total oxidant status and malondialdehyde level) and neuronal loss in the cerebral cortex and hippocampus in H&E staining (P < 0.05). HIIT and Ecdy improved anxiety-like behavior, attenuated total oxidant status and malondialdehyde, and prevented the neuronal loss (P < 0.05). However, their combination resulted in a more complete and powerful improvement in all the above-mentioned Aβ-related deficits (P < 0.05). Overall, these data provide evidence that a combination of HIIT and Ecdy treatment improves Aβ-induced behavioral deficits, possibly through ameliorating hippocampal oxidative status and preventing neuronal loss.
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Phloretin suppresses neuroinflammation by autophagy-mediated Nrf2 activation in macrophages. J Neuroinflammation 2021; 18:148. [PMID: 34218792 PMCID: PMC8254976 DOI: 10.1186/s12974-021-02194-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 06/16/2021] [Indexed: 12/31/2022] Open
Abstract
Background Macrophages play a dual role in neuroinflammatory disorders such as multiple sclerosis (MS). They are involved in lesion onset and progression but can also promote the resolution of inflammation and repair of damaged tissue. In this study, we investigate if and how phloretin, a flavonoid abundantly present in apples and strawberries, lowers the inflammatory phenotype of macrophages and suppresses neuroinflammation. Methods Transcriptional changes in mouse bone marrow-derived macrophages upon phloretin exposure were assessed by bulk RNA sequencing. Underlying pathways related to inflammation, oxidative stress response and autophagy were validated by quantitative PCR, fluorescent and absorbance assays, nuclear factor erythroid 2–related factor 2 (Nrf2) knockout mice, western blot, and immunofluorescence. The experimental autoimmune encephalomyelitis (EAE) model was used to study the impact of phloretin on neuroinflammation in vivo and confirm underlying mechanisms. Results We show that phloretin reduces the inflammatory phenotype of macrophages and markedly suppresses neuroinflammation in EAE. Phloretin mediates its effect by activating the Nrf2 signaling pathway. Nrf2 activation was attributed to 5′ AMP-activated protein kinase (AMPK)-dependent activation of autophagy and subsequent kelch-like ECH-associated protein 1 (Keap1) degradation. Conclusions This study opens future perspectives for phloretin as a therapeutic strategy for neuroinflammatory disorders such as MS. Trial registration Not applicable. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02194-z.
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Guo Y, Wang L, Lu J, Jiao J, Yang Y, Zhao H, Liang Z, Zheng H. Ginsenoside Rg1 improves cognitive capability and affects the microbiota of large intestine of tree shrew model for Alzheimer's disease. Mol Med Rep 2021; 23:291. [PMID: 33649817 PMCID: PMC7930927 DOI: 10.3892/mmr.2021.11931] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 12/10/2020] [Indexed: 12/21/2022] Open
Abstract
Ginsenoside Rg1 (Rg1) is traditional Chinese medicine with neuroprotective activity. Previous studies have demonstrated that Rg1 improves Alzheimer's disease (AD) and alters gut microbiology, but its mechanism remains to be elucidated, and thus far, its use in the treatment of AD has not been satisfactory. The present study investigated the improvement effects of Rg1 and its association with the microbiota of the large intestine. Following treatment with Rg1 in AD tree shrews, the treatment group demonstrated significantly shorter escape latency and crossed a platform more frequently in a water maze test. Western blotting demonstrated that Rg1 inhibited the expression of β-secretase 1, while increasing microtubule-associated protein 2 and Fox-3 in the hippocampus. Immunohistochemical analysis revealed that Rg1 decreased the expression of amyloid β, tau phosphorylated at serine 404 and pro-apoptotic factor Bax, while increasing the expression of Bcl-2 in the hippocampus and cortex. High throughput sequencing of 16S rRNA demonstrated that Rg1 altered the microbiota abundance of the large intestine. In conclusion, Rg1 affected the expression of apoptosis proteins, possessed a neuroprotective effect and may have a close association with the microbiota of large intestine by significantly reducing the abundance of Bacteroidetes and increasing the energy requirement of tree shrews.
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Affiliation(s)
- Yuqian Guo
- Department of Laboratory Animal Science, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Limei Wang
- Department of Laboratory Animal Science, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Jiangli Lu
- Department of Laboratory Animal Science, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Jianlin Jiao
- Technology Transfer Center, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Yi Yang
- Department of Laboratory Animal Science, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Hongbin Zhao
- Department of Emergency Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650031, P.R. China
| | - Zhang Liang
- Research Management Office for Science and Technology, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Hong Zheng
- Department of Laboratory Animal Science, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
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Wang L, Long M, Wang M, Peng S, Chen G, Zhou J, Ou C. Trigeminal neuralgia causes neurodegeneration in rats associated with upregulation of the CD95/CD95L pathway. Mol Pain 2021; 16:1744806920908092. [PMID: 32013712 PMCID: PMC7054737 DOI: 10.1177/1744806920908092] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Objectives To explore the effects of trigeminal neuralgia on neurodegeneration
in rats and the underlining mechanism. Methods Sixty adult male Sprague Dawley rats were divided randomly into
Chronic Constriction Injury of the Rat’s Infraorbital Nerve
(ION-CCI) group and sham group (n = 30). Right
suborbital nerve was ligated in ION-CCI group to establish a
trigeminal neuralgia model. In sham group, suborbital nerve was
exposed without ligation. Pain thresholds were measured before
surgery and 1, 7, 15, and 30 days after surgery
(n = 10). Morris water maze tests
(n = 10) were conducted at 1, 15, and
30 days after surgery to evaluate the changes in learning and
memory ability of rats. At 5, 19, and 34 days after surgery,
serum S100β protein concentration and hippocampal Aβ1-42 protein
expression were detected by enzyme-linked immunosorbent assay;
total tau protein expression was detected by Western blotting;
changes of neurons in hippocampus were observed by Nissl
staining; and the expression of ser404p-tau, cluster
of differentiation (CD)95, CD95L, and cleaved caspase-3 proteins
was detected by immunofluorescence and Western blotting. Results Hyperalgesia occurred in ION-CCI group, and mechanical pain
threshold decreased significantly
(P < 0.05). On the 15th and 30th days after
surgery, ION-CCI group showed lower learning and memory ability
than sham group (P < 0.05). Serum S100β
protein concentration, hippocampal A β1-42, and
ser404p-tau protein expression increased in the
ION-CCI group 19 and 34 days after surgery
(P < 0.05), hippocampal CD95 expression
increased in the ION-CCI group after surgery
(P < 0.05), hippocampal CD95L expression
increased at 19 and 34 days after surgery
(P < 0.05), and cleaved caspase-3 expression
increased at 5 and 19 days after surgery
(P < 0.05). Nissl bodies in ION-CCI group
decreased significantly at 15 days after surgery. The expression
of cleaved caspase-3 protein in ION-CCI group was positively
correlated with the expression of CD95 and CD95L
(P < 0.05). Conclusions Trigeminal neuralgia may lead to neuronal inflammation and neuronal
apoptosis associated with upregulation of CD95/CD95L expression,
thus causing neurodegeneration.
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Affiliation(s)
- Lu Wang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China.,Laboratory of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Menghong Long
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China.,Laboratory of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Maohua Wang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Shuangchun Peng
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China.,Laboratory of Anesthesiology, Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Guangxiang Chen
- Department of Radiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Jun Zhou
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
| | - Cehua Ou
- Pain Department, The Affiliated Hospital of Southwest Medical University, Luzhou, P.R. China
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13
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Ishikawa T. Saccharomyces cerevisiae in neuroscience: how unicellular organism helps to better understand prion protein? Neural Regen Res 2021; 16:489-495. [PMID: 32985470 PMCID: PMC7996030 DOI: 10.4103/1673-5374.293137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The baker’s yeast Saccharomyces (S.) cerevisiae is a single-celled eukaryotic model organism widely used in research on life sciences. Being a unicellular organism, S. cerevisiae has some evident limitations in application to neuroscience. However, yeast prions are extensively studied and they are known to share some hallmarks with mammalian prion protein or other amyloidogenic proteins found in the pathogenesis of Alzheimer’s, Parkinson’s, or Huntington’s diseases. Therefore, the yeast S. cerevisiae has been widely used for basic research on aggregation properties of proteins in cellulo and on their propagation. Recently, a yeast-based study revealed that some regions of mammalian prion protein and amyloid β1–42 are capable of induction and propagation of yeast prions. It is one of the examples showing that evolutionarily distant organisms share common mechanisms underlying the structural conversion of prion proteins making yeast cells a useful system for studying mammalian prion protein. S. cerevisiae has also been used to design novel screening systems for anti-prion compounds from chemical libraries. Yeast-based assays are cheap in maintenance and safe for the researcher, making them a very good choice to perform preliminary screening before further characterization in systems engaging mammalian cells infected with prions. In this review, not only classical red/white colony assay but also yeast-based screening assays developed during last year are discussed. Computational analysis and research carried out using yeast prions force us to expect that prions are widely present in nature. Indeed, the last few years brought us several examples indicating that the mammalian prion protein is no more peculiar protein – it seems that a better understanding of prion proteins nature-wide may aid us with the treatment of prion diseases and other amyloid-related medical conditions.
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Affiliation(s)
- Takao Ishikawa
- Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Warsaw, Poland
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14
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Luteolin Protects Pheochromocytoma (PC-12) Cells against A β 25-35-Induced Cell Apoptosis through the ER/ERK/MAPK Signalling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:2861978. [PMID: 33335556 PMCID: PMC7723489 DOI: 10.1155/2020/2861978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 12/20/2022]
Abstract
The regulatory effect of luteolin on the progression of Alzheimer's disease (AD) remains unclear from the perspective of apoptosis. The present study aimed to investigate the protective effects of luteolin against Aβ 25-35-induced cell apoptosis in pheochromocytoma (PC-12) cells. Aβ 25-35 was used to induce an in vitro model of AD. Estradiol was used as a positive control. The PC-12 cells were incubated with luteolin alone or in combination with fulvestrant or U0126. The results showed that luteolin treatment significantly prevents Aβ 25-35-induced decrease in cell viability and inhibits Aβ 25-35-induced cell apoptosis. After the addition of fulvestrant and U0126, the apoptosis rate of PC-12 cells increased significantly. In addition, luteolin treatment significantly upregulated the expression of Bcl-2 and downregulated the expression of Bax and caspase-3, whereas fulvestrant and U0126 partially reversed the effects of luteolin. Moreover, luteolin treatment upregulated the expression of ERβ and p-ERK1/2, whereas fulvestrant blocked the expression of p-ERK1/2. The study showed that luteolin could activate the ER/ERK/MAPK signalling pathway to protect PC-12 cells against Aβ 25-35-induced cell apoptosis via selectively acting on ERβ. Thus, luteolin may be considered as a potential novel therapeutic strategy for AD.
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15
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Berberine ameliorates rats model of combined Alzheimer's disease and type 2 diabetes mellitus via the suppression of endoplasmic reticulum stress. 3 Biotech 2020; 10:359. [PMID: 32832321 DOI: 10.1007/s13205-020-02354-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 07/22/2020] [Indexed: 12/30/2022] Open
Abstract
This study is aimed to investigate the protective effect against type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD) of Berberine (BBR), and the underlying mechanism of action is explored. We established a rat model of combined AD and T2DM and used it to investigate the effect of BBR (150 mg/kg) on the course of these pathologies. The Morris water maze, biochemical analysis, hematoxylin-eosin staining, immunohistochemical study, immunofluorescent staining, TUNEL assay, RT-qPCR and western blot were used to reveal the effect of BBR on blood glucose, lipid changes, hippocampal injuries and cognitive impairment. The results showed that BBR could alleviate memory deficits, restore the disordered arrangement of nerve cells, the damage of neurons, improve TUNEL-positive cells and decrease the elevated levels of fasting blood glucose, triglyceride, total cholesterol and glycosylated serum protein levels in Alzheimer diabetic rats. Moreover, BBR treatment reduces the transcription of mRNAs and expression of proteins related to endoplasmic reticulum (ER) stress. These findings conclude that BBR can protect neurons by inhibiting the pathway of ER stress and thereby play an essential role in the preventive and therapeutic of AD and T2DM.
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16
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Fukuda T, Sato Y, Takiguchi M, Yamamoto T, Murasawa H, Pawlak A, Kobayashi H, Tamano H, Takeda A. Dehydroeffusol Rescues Amyloid β 25-35-Induced Spatial Working Memory Deficit. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2020; 75:279-282. [PMID: 32333241 DOI: 10.1007/s11130-020-00816-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Amyloid β (Aβ) peptides produced from the amyloid precursor protein, a transmembrane protein, are neurotoxic and blocking the neurotoxicity may lead to prevention of Alzheimer's disease (AD). Here we tested whether Aβ25-35-induced cognitive decline is rescued by treatment with dehydroeffusol, a phenanthrene isolated from Chinese medicine Juncus effusus. Dehydroeffusol (5 ~ 15 mg/kg body weight) was orally administered to mice for 6 days and Aβ25-35 (2 mM) was injected at the rate of 1 μl/min for 3 min into the lateral ventricle. Y-maze test was performed after dehydroeffusol administration for 12 days. Aβ25-35 impaired learning and memory in the test, while the impairment was dose-dependently rescued by dehydroeffusol administration. The present study indicates that treatment with dehydroeffusol is effective for rescuing Aβ25-35-induced cognitive decline.
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Affiliation(s)
- Toshiyuki Fukuda
- Satoen CO., LTD., 1057 Ohhara, Aoi-ku, Shizuoka, 421-1392, Japan
| | - Yuichi Sato
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Mako Takiguchi
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Takahiro Yamamoto
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Hiroyasu Murasawa
- Hashima Laboratory, Nihon Bioresearch Inc, 6-104, Majima, Fukuju-cho, Hashima, Gifu, 501-6251, Japan
| | - Akiko Pawlak
- Hashima Laboratory, Nihon Bioresearch Inc, 6-104, Majima, Fukuju-cho, Hashima, Gifu, 501-6251, Japan
| | - Hiroyuki Kobayashi
- Hashima Laboratory, Nihon Bioresearch Inc, 6-104, Majima, Fukuju-cho, Hashima, Gifu, 501-6251, Japan
| | - Haruna Tamano
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Atsushi Takeda
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.
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17
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Du Z, Valtierra S, Cardona LR, Dunne SF, Luan CH, Li L. Identifying Anti-prion Chemical Compounds Using a Newly Established Yeast High-Throughput Screening System. Cell Chem Biol 2019; 26:1664-1680.e4. [PMID: 31668517 DOI: 10.1016/j.chembiol.2019.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/31/2019] [Accepted: 10/02/2019] [Indexed: 12/12/2022]
Abstract
Prion-like protein aggregation underlies the pathology of a group of fatal neurodegenerative diseases in humans, including Alzheimer's disease (AD), Parkinson's disease, amyotrophic lateral sclerosis, and transmissible spongiform encephalopathy. At present, few high-throughput screening (HTS) systems are available for anti-prion small-molecule identification. Here we describe an innovative phenotypic HTS system in yeast that allows for efficient identification of chemical compounds that eliminate the yeast prion [SWI+]. We show that some identified anti-[SWI+] compounds can destabilize other non-[SWI+] prions, and their antagonizing effects can be prion- and/or variant specific. Intriguingly, among the identified hits are several previously identified anti-PrPSc compounds and a couple of US Food and Drug Administration-approved drugs for AD treatment, validating the efficacy of this HTS system. Moreover, a few hits can reduce proteotoxicity induced by expression of several pathogenic mammalian proteins. Thus, we have established a useful HTS system for identifying compounds that can potentially antagonize prionization and human proteinopathies.
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Affiliation(s)
- Zhiqiang Du
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Stephanie Valtierra
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Luzivette Robles Cardona
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Sara Fernandez Dunne
- High Throughput Analysis Laboratory and Department of Molecular Biosciences, Northwestern University, Chicago, IL 60628, USA
| | - Chi-Hao Luan
- High Throughput Analysis Laboratory and Department of Molecular Biosciences, Northwestern University, Chicago, IL 60628, USA
| | - Liming Li
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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18
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Zhang G, Yang G, Liu J. Phloretin attenuates behavior deficits and neuroinflammatory response in MPTP induced Parkinson's disease in mice. Life Sci 2019; 232:116600. [PMID: 31251998 DOI: 10.1016/j.lfs.2019.116600] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/22/2019] [Accepted: 06/24/2019] [Indexed: 12/31/2022]
Abstract
Neuroinflammation is one of the significant neuropathological conditions in Parkinson's disease (PD) which is due to microglial and astrocytes activation leads to progressive dopaminergic neuronal loss. To date, Current PD drugs offers only symptomatic relief with adverse effects and lack of ability to prevent the progression of neurodegeneration. Therefore, a better approach to develop a multi potent drug of natural origin would be beneficial in managing the disease. Therefore, the present study aimed to investigate the neuroprotective and anti-inflammatory effects of PHL by exploring its neuroprotective mechanism in 1-methyl-4-phenyl-1,2,3,6-tetrahydro pyridine (MPTP) induced PD in mice. MPTP intoxication in mice cause motor abnormalities, decreased dopamine (DA) levels, reduced tyrosine hydroxylase (TH) enzyme protein expression and inflammation which were effectively restored by PHL. Moreover gliotic specific inflammatory markers like glial fibrillary acidic protein (GFAP), ionized calcium-binding adaptor protein-1 (Iba-1), iNOS and COX-2 were found to be expressed more in MPTP intoxicated mice, Further the levels of proinflammatory cytokines like IL-β, IL-6, and TNF-α were significantly upregulated in MPTP intoxicated mice, these deleterious responses were diminished to extend neuroprotection by PHL treatment. Our findings strongly suggest PHL as a potent therapeutic agent in treating PD.
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Affiliation(s)
- Gejuan Zhang
- Department of Neurology, Xi'an Jiaotong University Affiliated Xi'an Central Hospital, No.161, Xiwu Road, Xincheng District, Xi'an, Shaanxi Province 710003, China
| | - Geqiang Yang
- Department of Ophthalmology, Xi'an Jiaotong University Affiliated Xi'an Central Hospital, No.161, Xiwu Road, Xincheng District, Xi'an, Shaanxi Province 710003, China
| | - Jian Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, No.76 Yanta West Road, Yanta District, Xi'an, Shaanxi Province 710061, China.
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