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Bakun P, Mlynarczyk DT, Koczorowski T, Cerbin-Koczorowska M, Piwowarczyk L, Kolasiński E, Stawny M, Kuźmińska J, Jelińska A, Goslinski T. Tea-break with epigallocatechin gallate derivatives - Powerful polyphenols of great potential for medicine. Eur J Med Chem 2023; 261:115820. [PMID: 37776575 DOI: 10.1016/j.ejmech.2023.115820] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 10/02/2023]
Abstract
Epigallocatechin gallate (EGCG) is a polyphenol present in green tea (Camellia sinensis), which has revealed anti-cancer effects toward a variety of cancer cells in vitro and protective potential against neurodegenerative diseases such as Alzheimer's and Parkinson's. Unfortunately, EGCG presents disappointing bioavailability after oral administration, primarily due to its chemical instability and poor absorption. Due to these limitations, EGCG is currently not used in medication, but only as a dietary supplement in the form of green tea extract. Therefore, it needs further modifications before being considered suitable for extensive medical applications. In this article, we review the scientific literature about EGCG derivatives focusing on their biological properties and potential medical applications. The most common chemical modifications of epigallocatechin gallate rely on introducing fatty acid chains or sugar molecules to its chemical structure to modify solubility. Another frequently employed procedure is based on blocking EGCG's hydroxyl groups with various substituents. Novel derivatives reveal interesting properties, of which, antioxidant, anti-inflammatory, antitumor and antimicrobial, are especially important. It is worth noting that the most promising EGCG derivatives present higher stability and activity than base EGCG.
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Affiliation(s)
- Paweł Bakun
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland.
| | - Dariusz T Mlynarczyk
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Tomasz Koczorowski
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Magdalena Cerbin-Koczorowska
- Chair and Department of Medical Education, Poznan University of Medical Sciences, Rokietnicka 7, Poznań, 60-806, Poland; Edinburgh Medical School: Medical Education, University of Edinburgh, Chancellor's Building, EH16 4SB, Edinburgh, Scotland, United Kingdom
| | - Ludwika Piwowarczyk
- Chair and Department of Pharmaceutical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Emil Kolasiński
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Maciej Stawny
- Chair and Department of Pharmaceutical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Joanna Kuźmińska
- Chair and Department of Pharmaceutical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Anna Jelińska
- Chair and Department of Pharmaceutical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland
| | - Tomasz Goslinski
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, Poznań, 60-780, Poland.
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Huang Y, Cuan X, Zhu W, Yang X, Zhao Y, Sheng J, Zi C, Wang X. An EGCG Derivative in Combination with Nimotuzumab for the Treatment of Wild-Type EGFR NSCLC. Int J Mol Sci 2023; 24:14012. [PMID: 37762316 PMCID: PMC10531337 DOI: 10.3390/ijms241814012] [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: 08/18/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Inhibiting the tyrosine kinase activity of epidermal growth factor receptor (EGFR) using small-molecule tyrosine kinase inhibitors (TKIs) or monoclonal antibodies is often ineffective in treating cancers harboring wild-type EGFR. Given the fact that EGFR possesses a kinase-independent pro-survival function, more effective inhibition of EGFR-mediated signals is therefore necessary. In this study, we investigated the effects of using a combination of low-dose nimotuzumab and theasinensin A to evaluate whether the inhibitory effect of nimotuzumab on NCI-H441 cancer cells was enhanced. Here, theasinensin A, a novel epigallocatechin-3-gallate (EGCG) derivative, was identified and its potent anticancer activity against wild-type EGFR NSCLC was demonstrated in vitro; the anticancer activity was induced through degradation of EGFR. Mechanistic studies further revealed that theasinensin A bound directly to the EGFR extracellular domain, which decreased interaction with its ligand EGF in combination with nimotuzumab. Theasinensin A significantly promoted EGFR degradation and repressed downstream survival pathways in combination with nimotuzumab. Meanwhile, treatment with theasinensin A and nimotuzumab prevented xenograft growth, whereas the single agents had limited effect. Thus, the combination therapy of theasinensin A with nimotuzumab is a powerful candidate for treatment of wild-type EGFR cancers.
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Affiliation(s)
- Yanping Huang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Science, Yunnan Agricultural University, Kunming 650201, China
| | - Xiangdan Cuan
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Weiwei Zhu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Xingying Yang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Yunli Zhao
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
| | - Jun Sheng
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming 650201, China
| | - Chengting Zi
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Science, Yunnan Agricultural University, Kunming 650201, China
| | - Xuanjun Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; (Y.H.); (X.C.); (W.Z.); (X.Y.); (Y.Z.); (J.S.)
- College of Science, Yunnan Agricultural University, Kunming 650201, China
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The Role of Green Tea Catechin Epigallocatechin Gallate (EGCG) and Mammalian Target of Rapamycin (mTOR) Inhibitor PP242 (Torkinib) in the Treatment of Spinal Cord Injury. Antioxidants (Basel) 2023; 12:antiox12020363. [PMID: 36829922 PMCID: PMC9952296 DOI: 10.3390/antiox12020363] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/25/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating condition that has physical and psychological consequences for patients. SCI is accompanied by scar formation and systemic inflammatory response leading to an intense degree of functional loss. The catechin, epigallocatechin gallate (EGCG), an active compound found in green tea, holds neuroprotective features and is known for its anti-inflammatory potential. The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that exists in two functionally distinct complexes termed mTOR complex 1 and 2 (mTORC1; mTORC2). Inhibition of mTORC1 by rapamycin causes neuroprotection, leading to partial recovery from SCI. In this study the effects of EGCG, PP242 (an inhibitor of both complexes of mTOR), and a combination of EGCG and PP242 in SCI have been examined. It has been found that both EGCG and PP242 significantly improved sensory/motor functions following SCI. However, EGCG appeared to be more effective (BBB motor test, from 2 to 8 weeks after SCI, p = 0.019, p = 0.007, p = 0.006, p = 0.006, p = 0.05, p = 0.006, and p = 0.003, respectively). The only exception was the Von Frey test, where EGCG was ineffective, while mTOR inhibition by PP242, as well as PP242 in combination with EGCG, significantly reduced withdrawal latency starting from week three (combinatorial therapy (EGCG + PP242) vs. control at 3, 5, and 7 weeks, p = 0.011, p = 0.007, and p = 0.05, respectively). It has been found that EGCG was as effective as PP242 in suppressing mTOR signaling pathways, as evidenced by a reduction in phosphorylated S6 expression (PP242 (t-test, p < 0.0001) or EGCG (t-test, p = 0.0002)). These results demonstrate that EGCG and PP242 effectively suppress mTOR pathways, resulting in recovery from SCI in rats, and that EGCG acts via suppressing mTOR pathways.
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A Systematic Review and Meta-Analysis on the Role of Nutraceuticals in the Management of Neuropathic Pain in In Vivo Studies. Antioxidants (Basel) 2022; 11:antiox11122361. [PMID: 36552569 PMCID: PMC9774415 DOI: 10.3390/antiox11122361] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/19/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022] Open
Abstract
The control of neuropathic pain is a leading challenge in modern medicine. Traditional medicine has, for a long time, used natural compounds such as nutraceuticals for this purpose, and extensive evidence has supported their role in controlling oxidative stress and persistent pain-related inflammation. Nutraceuticals are natural products belonging to the food sector whose consumption could be related to physiological benefits. Indeed, they are used to improve health, prevent chronic diseases, and delay the aging process. Here, we report a systematic review and meta-analysis to provide a more comprehensive report on the use of nutraceuticals in neuropathic pain, including evaluating confounding factors. A search of the literature has been conducted on principal databases (PubMed, MEDLINE, EMBASE, and Web of Science) following the PRISMA statement, and we retrieved 484 articles, 12 of which were selected for the meta-analysis. The results showed that administration of natural drugs in animals with neuropathic pain led to a significant reduction in thermal hyperalgesia, measured in both the injured paw (SMD: 1.79; 95% CI: 1.41 to 2.17; p < 0.0001) and in the two paws (SMD: −1.74; 95% CI: −3.36 to −0.11; p = 0.036), as well as a reduction in mechanical allodynia and hyperalgesia (SMD: 1.95, 95% CI: 1.08 to 2.82; p < 0.001) when compared to controls. The results of the review indicate that nutraceutical compounds could be clinically relevant for managing persistent neuropathic pain.
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Oxidized tea polyphenol (OTP-3) targets EGFR synergistic nimotuzumab at inhibition of non-small cell lung tumor growth. Bioorg Chem 2022; 128:106084. [DOI: 10.1016/j.bioorg.2022.106084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/30/2022] [Accepted: 08/03/2022] [Indexed: 11/21/2022]
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Shen CL, Castro L, Fang CY, Castro M, Sherali S, White S, Wang R, Neugebauer V. Bioactive compounds for neuropathic pain: An update on preclinical studies and future perspectives. J Nutr Biochem 2022; 104:108979. [PMID: 35245654 DOI: 10.1016/j.jnutbio.2022.108979] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/21/2022] [Accepted: 02/21/2022] [Indexed: 12/19/2022]
Abstract
Among different types of chronic pain, neuropathic pain (NP), arising from damage to the nervous system, including peripheral fibers and central neurons, is notoriously difficult to treat and affects 7-10% of the general population. Currently available treatment options for NP are limited and opioid analgesics have severe side effects and can result in opioid use disorder. Recent studies have exhibited the role of dietary bioactive compounds in the mitigation of NP. Here, we assessed the effects of commonly consumed bioactive compounds (ginger, curcumin, omega-3 polyunsaturated fatty acids, epigallocatechin gallate, resveratrol, soy isoflavones, lycopene, and naringin) on NP and NP-related neuroinflammation. Cellular studies demonstrated that these bioactive compounds reduce inflammation via suppression of NF-κB and MAPK signaling pathways that regulate apoptosis/cell survival, antioxidant, and anti-inflammatory responses. Animal studies strongly suggest that these regularly consumed bioactive compounds have a pronounced anti-NP effect as shown by decreased mechanical allodynia, mechanical hyperalgesia, thermal hyperalgesia, and cold hyperalgesia. The proposed molecular mechanisms include (1) the enhancement of neuron survival, (2) the reduction of neuronal hyperexcitability by activation of antinociceptive cannabinoid 1 receptors and opioid receptors, (3) the suppression of sodium channel current, and (4) enhancing a potassium outward current in NP-affected animals, triggering a cascade of chemical changes within, and between neurons for pain relief. Human studies administered in this area have been limited. Future randomized controlled trials are warranted to confirm the findings of preclinical efficacies using bioactive compounds in patients with NP.
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Affiliation(s)
- Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, Texas, USA; Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, Texas, USA; Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
| | - Luis Castro
- School of Medicine, Texas Tech University Health Sciences, Lubbock, Texas, USA
| | - Chih-Yu Fang
- School of Medicine, Texas Tech University Health Sciences, Lubbock, Texas, USA
| | - Maribel Castro
- School of Medicine, Texas Tech University Health Sciences, Lubbock, Texas, USA
| | - Samir Sherali
- School of Medicine, Texas Tech University Health Sciences, Lubbock, Texas, USA
| | - Steely White
- Department of Microbiology, Texas Tech University, Lubbock, Texas, USA
| | - Rui Wang
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Volker Neugebauer
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, Texas, USA; Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, Texas, USA; Department of Pharmacology & Neuroscience, Texas Tech University Health Sciences Center, Lubbock, Texas, USA; Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
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Rao PN, Mainkar O, Bansal N, Rakesh N, Haffey P, Urits I, Orhurhu V, Kaye AD, Urman RD, Gulati A, Jones M. Flavonoids in the Treatment of Neuropathic Pain. Curr Pain Headache Rep 2021; 25:43. [PMID: 33961144 DOI: 10.1007/s11916-021-00959-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2021] [Indexed: 01/25/2023]
Abstract
PURPOSE OF REVIEW Chronic pain continues to present a large burden to the US healthcare system. Neuropathic pain, a common class of chronic pain, remains particularly difficult to treat despite extensive research efforts. Current pharmacologic regimens exert limited efficacy and wide, potentially dangerous side effect profiles. This review provides a comprehensive, preclinical evaluation of the literature regarding the role of flavonoids in the treatment of neuropathic pain. RECENT FINDINGS Flavonoids are naturally occurring compounds, found in plants and various dietary sources, which may have potential benefit in neuropathic pain. Numerous animal-model studies have demonstrated this benefit, including reversal of hyperalgesia and allodynia. Flavonoids have also exhibited an anti-inflammatory effect relevant to neuropathic pain, as evidenced by the reduction in multiple pro-inflammatory mediators, such as TNF-α, NF-κB, IL-1β, and IL-6. Flavonoids represent a potentially new treatment modality for neuropathic pain in preclinical models, though human clinical evidence is yet to be explored at this time.
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Affiliation(s)
- Prashant N Rao
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA
| | - Ojas Mainkar
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA
| | - Nitin Bansal
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA
| | - Neal Rakesh
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA
| | - Paul Haffey
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA
| | - Ivan Urits
- Southcoast Health, Southcoast Health Physicians Group, New Bedford, MA, USA
- Department of Anesthesiology, Louisiana State University Health Shreveport, Shreveport, LA, USA
| | - Vwaire Orhurhu
- Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Alan D Kaye
- Department of Anesthesiology, Louisiana State University Health Shreveport, Shreveport, LA, USA
| | - Richard D Urman
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Amitabh Gulati
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Mark Jones
- Department of Anesthesiology, New York-Presbyterian, Weill Cornell Medical College, 525 East 68th Street, Box 124, New York, NY, 10065, USA.
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Uddin MS, Mamun AA, Rahman MA, Kabir MT, Alkahtani S, Alanazi IS, Perveen A, Ashraf GM, Bin-Jumah MN, Abdel-Daim MM. Exploring the Promise of Flavonoids to Combat Neuropathic Pain: From Molecular Mechanisms to Therapeutic Implications. Front Neurosci 2020; 14:478. [PMID: 32587501 PMCID: PMC7299068 DOI: 10.3389/fnins.2020.00478] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/17/2020] [Indexed: 01/10/2023] Open
Abstract
Neuropathic pain (NP) is the result of irregular processing in the central or peripheral nervous system, which is generally caused by neuronal injury. The management of NP represents a great challenge owing to its heterogeneous profile and the significant undesirable side effects of the frequently prescribed psychoactive agents, including benzodiazepines (BDZ). Currently, several established drugs including antidepressants, anticonvulsants, topical lidocaine, and opioids are used to treat NP, but they exert a wide range of adverse effects. To reduce the burden of adverse effects, we need to investigate alternative therapeutics for the management of NP. Flavonoids are the most common secondary metabolites of plants used in folkloric medicine as tranquilizers, and have been claimed to have a selective affinity to the BDZ binding site. Several studies in animal models have reported that flavonoids can reduce NP. In this paper, we emphasize the potentiality of flavonoids for the management of NP.
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Affiliation(s)
- Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh.,Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Abdullah Al Mamun
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh.,Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Md Ataur Rahman
- Center for Neuroscience, Brain Science Institute, Korea Institute of Science and Technology, Seoul, South Korea
| | | | - Saad Alkahtani
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ibtesam S Alanazi
- Department of Biology, Faculty of Sciences, Univesity of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
| | - Asma Perveen
- Glocal School of Life Sciences, Glocal University, Saharanpur, India
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - May N Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Mohamed M Abdel-Daim
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia.,Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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Kytidou K, Artola M, Overkleeft HS, Aerts JMFG. Plant Glycosides and Glycosidases: A Treasure-Trove for Therapeutics. FRONTIERS IN PLANT SCIENCE 2020; 11:357. [PMID: 32318081 PMCID: PMC7154165 DOI: 10.3389/fpls.2020.00357] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/11/2020] [Indexed: 05/10/2023]
Abstract
Plants contain numerous glycoconjugates that are metabolized by specific glucosyltransferases and hydrolyzed by specific glycosidases, some also catalyzing synthetic transglycosylation reactions. The documented value of plant-derived glycoconjugates to beneficially modulate metabolism is first addressed. Next, focus is given to glycosidases, the central theme of the review. The therapeutic value of plant glycosidases is discussed as well as the present production in plant platforms of therapeutic human glycosidases used in enzyme replacement therapies. The increasing knowledge on glycosidases, including structure and catalytic mechanism, is described. The novel insights have allowed the design of functionalized highly specific suicide inhibitors of glycosidases. These so-called activity-based probes allow unprecedented visualization of glycosidases cross-species. Here, special attention is paid on the use of such probes in plant science that promote the discovery of novel enzymes and the identification of potential therapeutic inhibitors and chaperones.
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Affiliation(s)
- Kassiani Kytidou
- Department of Medical Biochemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Marta Artola
- Department of Medical Biochemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
- Department of Bio-organic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Herman S. Overkleeft
- Department of Bio-organic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Johannes M. F. G. Aerts
- Department of Medical Biochemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
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Basu P, Basu A. In Vitro and In Vivo Effects of Flavonoids on Peripheral Neuropathic Pain. Molecules 2020; 25:molecules25051171. [PMID: 32150953 PMCID: PMC7179245 DOI: 10.3390/molecules25051171] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/02/2020] [Indexed: 01/04/2023] Open
Abstract
Neuropathic pain is a common symptom and is associated with an impaired quality of life. It is caused by the lesion or disease of the somatosensory system. Neuropathic pain syndromes can be subdivided into two categories: central and peripheral neuropathic pain. The present review highlights the peripheral neuropathic models, including spared nerve injury, spinal nerve ligation, partial sciatic nerve injury, diabetes-induced neuropathy, chemotherapy-induced neuropathy, chronic constriction injury, and related conditions. The drugs which are currently used to attenuate peripheral neuropathy, such as antidepressants, anticonvulsants, baclofen, and clonidine, are associated with adverse side effects. These negative side effects necessitate the investigation of alternative therapeutics for treating neuropathic pain conditions. Flavonoids have been reported to alleviate neuropathic pain in murine models. The present review elucidates that several flavonoids attenuate different peripheral neuropathic pain conditions at behavioral, electrophysiological, biochemical and molecular biological levels in different murine models. Therefore, the flavonoids hold future promise and can be effectively used in treating or mitigating peripheral neuropathic conditions. Thus, future studies should focus on the structure-activity relationships among different categories of flavonoids and develop therapeutic products that enhance their antineuropathic effects.
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Affiliation(s)
- Paramita Basu
- Department of Anesthesiology, Pittsburgh Center for Pain Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA;
| | - Arpita Basu
- Department of Kinesiology and Nutrition Sciences, School of Integrated Health Sciences, University of Nevada, Las Vegas, NV 89154, USA
- Correspondence: ; Tel.: +702-895-4576; Fax: +702-895-1500
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The Importance of Natural Antioxidants in the Treatment of Spinal Cord Injury in Animal Models: An Overview. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:3642491. [PMID: 32676138 PMCID: PMC7336207 DOI: 10.1155/2019/3642491] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 10/04/2019] [Indexed: 02/06/2023]
Abstract
Patients with spinal cord injury (SCI) face devastating health, social, and financial consequences, as well as their families and caregivers. Reducing the levels of reactive oxygen species (ROS) and oxidative stress are essential strategies for SCI treatment. Some compounds from traditional medicine could be useful to decrease ROS generated after SCI. This review is aimed at highlighting the importance of some natural compounds with antioxidant capacity used in traditional medicine to treat traumatic SCI. An electronic search of published articles describing animal models of SCI treated with natural compounds from traditional medicine was conducted using the following terms: Spinal Cord Injuries (MeSH terms) AND Models, Animal (MeSH terms) AND [Reactive Oxygen Species (MeSH terms) AND/OR Oxidative Stress (MeSH term)] AND Medicine, Traditional (MeSH terms). Articles reported from 2010 to 2018 were included. The results were further screened by title and abstract for studies performed in rats, mice, and nonhuman primates. The effects of these natural compounds are discussed, including their antioxidant, anti-inflammatory, and antiapoptotic properties. Moreover, the antioxidant properties of natural compounds were emphasized since oxidative stress has a fundamental role in the generation and progression of several pathologies of the nervous system. The use of these compounds diminishes toxic effects due to their high antioxidant capacity. These compounds have been tested in animal models with promising results; however, no clinical studies have been conducted in humans. Further research of these natural compounds is crucial to a better understanding of their effects in patients with SCI.
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Kim E, Han SY, Hwang K, Kim D, Kim EM, Hossain MA, Kim JH, Cho JY. Antioxidant and Cytoprotective Effects of (-)-Epigallocatechin-3-(3″- O-methyl) Gallate. Int J Mol Sci 2019; 20:ijms20163993. [PMID: 31426336 PMCID: PMC6719974 DOI: 10.3390/ijms20163993] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/12/2019] [Accepted: 08/14/2019] [Indexed: 01/23/2023] Open
Abstract
Reactive oxygen species (ROS) are generated from diverse cellular processes or external sources such as chemicals, pollutants, or ultraviolet (UV) irradiation. Accumulation of radicals causes cell damage that can result in degenerative diseases. Antioxidants remove radicals by eliminating unpaired electrons from other molecules. In skin health, antioxidants are essential to protect cells from the environment and prevent skin aging. (-)-Epigallocatechin-3-(3″-O-methyl) gallate (3″Me-EGCG) has been found in limited oolong teas or green teas with distinctive methylated form, but its precise activities have not been fully elucidated. In this study, we examined the antioxidant roles of 3″Me-EGCG in keratinocytes (HaCaT cells). 3″Me-EGCG showed scavenging effects in cell and cell-free systems. Under H2O2 exposure, 3″Me-EGCG recovered cell viability and increased the expression of heme oxygenase 1 (HO-1). Under ultraviolet B (UVB) and sodium nitroprusside (SNP) exposure, 3″Me-EGCG protected keratinocytes and regulated the survival protein AKT1. By regulating the AKT1/NF-κB pathway, 3″Me-EGCG augmented cell survival and proliferation in HaCaT cells. These results indicate that 3″Me-EGCG exhibits antioxidant properties, resulting in cytoprotection against various external stimuli. In conclusion, our findings suggest that 3″Me-EGCG can be used as an ingredient of cosmetic products or health supplements.
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Affiliation(s)
- Eunji Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea
| | - Sang Yun Han
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea
- Daewoong Pharmaceutical Co., Yongin 17028, Korea
| | - Kyeonghwan Hwang
- Basic Research & Innovation vision, R&D Center, AmorePacific Corporation, Yongin 17074, Korea
| | - Donghyun Kim
- Basic Research & Innovation vision, R&D Center, AmorePacific Corporation, Yongin 17074, Korea
| | - Eun-Mi Kim
- Basic Research & Innovation vision, R&D Center, AmorePacific Corporation, Yongin 17074, Korea
| | | | - Jong-Hoon Kim
- College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Korea.
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea.
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Kühne BA, Puig T, Ruiz-Martínez S, Crous-Masó J, Planas M, Feliu L, Cano A, García ML, Fritsche E, Llobet JM, Gómez-Catalán J, Barenys M. Comparison of migration disturbance potency of epigallocatechin gallate (EGCG) synthetic analogs and EGCG PEGylated PLGA nanoparticles in rat neurospheres. Food Chem Toxicol 2019; 123:195-204. [DOI: 10.1016/j.fct.2018.10.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 01/01/2023]
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Yildiran H, Macit MS, Özata Uyar G. New approach to peripheral nerve injury: nutritional therapy. Nutr Neurosci 2018; 23:744-755. [PMID: 30526417 DOI: 10.1080/1028415x.2018.1554322] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Purpose of review: There is no review in the literature on the effect of nutrition-related factors on peripheral nerve injuries. Therefore, it is aimed to evaluate the effect of nutritional factors on nerve injuries in this compilation. Recent findings: Although there are several fundamental mechanisms by which nutrients and nutritional factors influence individuals, their exact impacts on neurogenesis have not been clearly identified. Recently, some studies showed that some nutrients have an important role in nerve injuries due to their neuroprotective properties. In addition to surgical treatment, in peripheral nerve injuries, these nutrients also may play a role in preserving nerve function and health, as well as in the recovery of an injured nerve tissue. Omega 3 and omega 6 fatty acids, group B vitamins, antioxidants, several minerals, phenolic compounds, and alpha lipoic acid are thought to have impacts on the nervous system. In addition to all of these, gut microbiota has effects on the nervous system, and some nutrient-related factors can also affect neurogenesis via gut microbiota. Summary: Peripheral nerve injury is a condition in which the nerves in the peripheral nervous system become damaged. After the trauma, the peripheral nerve is hardly repaired due to the following reasons; the disability of the regeneration of motor neurons, the lack of a survival environment for Schwann cells, and the poor ability of the nerves to regenerate. Nutrition-related factors, the effects of which were described in recent years, should be more taken into account more.
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Affiliation(s)
- Hilal Yildiran
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Melahat Sedanur Macit
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Ondokuz Mayıs University, Samsun, Turkey
| | - Gizem Özata Uyar
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Gazi University, Ankara, Turkey
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15
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Sayeli V, Nadipelly J, Kadhirvelu P, Cheriyan BV, Shanmugasundaram J, Subramanian V. Effect of flavonol and its dimethoxy derivatives on paclitaxel-induced peripheral neuropathy in mice. J Basic Clin Physiol Pharmacol 2018; 29:525-535. [PMID: 29652665 DOI: 10.1515/jbcpp-2016-0127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 02/27/2018] [Indexed: 06/08/2023]
Abstract
Abstract
Background:
Peripheral neuropathy is the dose limiting side effect of many anticancer drugs. Flavonoids exhibit good antinociceptive effect in animal models. Their efficacy against different types of nociception has been documented. The present study investigated the effect of flavonol (3-hydroxy flavone), 3′,4′-dimethoxy flavonol, 6,3′-dimethoxy flavonol, 7,2′-dimethoxy flavonol and 7,3′-dimethoxy flavonol against paclitaxel-induced peripheral neuropathy in mice.
Methods:
A single dose of paclitaxel (10 mg/kg, i.p.) was administered to induce peripheral neuropathy in mice and the manifestations of peripheral neuropathy such as tactile allodynia, cold allodynia and thermal hyperalgesia were assessed 24 h later by employing Von Frey hair aesthesiometer test, acetone bubble test and hot water tail immersion test, respectively. The test compounds were prepared as a suspension in 0.5% carboxymethyl cellulose and were administered s.c. in various doses (25, 50, 100 and 200 mg/kg). The above behavioral responses were assessed prior to and 30 min after drug treatment. In addition, the effect of test compounds on proinflammatory cytokines like tumor necrosis factor-alpha (TNF-α), interleukin-1-beta (IL-1β) and free radicals was investigated by using suitable in vitro assays.
Results:
A dose-dependent attenuation of tactile allodynia, cold allodynia and thermal hyperalgesia was evidenced in mice treated with flavonol derivatives. The test compounds inhibited TNF-α, IL-1β and free radicals in a concentration-dependent manner.
Conclusions:
These results revealed that flavonol and its dimethoxy derivatives ameliorated the manifestations of paclitaxel-induced peripheral neuropathy in mice. The inhibition of proinflammatory cytokines and free radicals could contribute to this beneficial effect.
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Affiliation(s)
- Vijaykumar Sayeli
- Department of Pharmacology, Mamata Medical College, Khammam, Telangana, India, Phone: 7845362994
| | - Jagan Nadipelly
- Department of Pharmacology, Faculty of Medicine-Pharmacology, Texila American University, Georgetown, Guyana
| | - Parimala Kadhirvelu
- Department of Pharmacology, Meenakshi Medical College and Research Institute, Meenakshi Academy of Higher Education and Research, Enathur, Kanchipuram, Tamil Nadu, India
| | - Binoy Varghese Cheriyan
- Department of Pharmaceutical Chemistry, VISTAS, Vels School of Pharmaceutical Sciences, Chennai, Tamil Nadu, India
| | - Jaikumar Shanmugasundaram
- Department of Pharmacology, Meenakshi Medical College and Research Institute, Meenakshi Academy of Higher Education and Research, Enathur, Kanchipuram, Tamil Nadu, India
| | - Viswanathan Subramanian
- Department of Pharmacology, Meenakshi Medical College and Research Institute, Meenakshi Academy of Higher Education and Research, Enathur, Kanchipuram, Tamil Nadu, India
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Lai YH, Sun CP, Huang HC, Chen JC, Liu HK, Huang C. Epigallocatechin gallate inhibits hepatitis B virus infection in human liver chimeric mice. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 18:248. [PMID: 30189898 PMCID: PMC6127945 DOI: 10.1186/s12906-018-2316-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 08/28/2018] [Indexed: 12/12/2022]
Abstract
Background Persistent hepatitis B virus (HBV) infection causes liver cirrhosis and hepatocellular carcinoma and constitutes a major worldwide health problem. Currently, anti-HBV drugs are limited to peginterferon and nucleos(t)ide analogs, which are costly and have considerable side effects; the development of novel, effective anti-HBV agents is crucial. Methods Catechins are a major group of compounds found in green tea extract and epigallocatechin gallate (EGCG) has been shown to have antiviral properties, including inhibition of cellular entry by HBV. FRG (Fah−/−/ Rag2−/−/ IL-2Rγ/−) mice were used in this study to generate chimeras carrying human primary hepatocytes, to facilitate investigation of the inhibitory effect of EGCG on HBV infection. Results Here, we show the inhibitory effect of EGCG on HBV infection and replication in HuS-E/2 cells. The inhibitory effect of EGCG on HBV infection in vivo was confirmed by monitoring HBV DNA and HBsAg in serum and immunostaining the liver tissues of the human liver chimeric mice. Conclusions The effects of EGCG suggest a robust strategy for the treatment of HBV infection and EGCG may have therapeutic potential for the treatment of HBV-associated liver diseases.
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Khalatbary AR, Khademi E. The green tea polyphenolic catechin epigallocatechin gallate and neuroprotection. Nutr Neurosci 2018; 23:281-294. [DOI: 10.1080/1028415x.2018.1500124] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ali Reza Khalatbary
- Department of Anatomy, Faculty of Medicine, Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Emad Khademi
- Department of Anatomy, Faculty of Medicine, Molecular and Cell Biology Research Center, Mazandaran University of Medical Sciences, Sari, Iran
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18
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Epigallocatechin-3-Gallate Reduces Neuronal Apoptosis in Rats after Middle Cerebral Artery Occlusion Injury via PI3K/AKT/eNOS Signaling Pathway. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6473580. [PMID: 29770336 PMCID: PMC5889863 DOI: 10.1155/2018/6473580] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/07/2018] [Accepted: 02/06/2018] [Indexed: 12/22/2022]
Abstract
Background/Aims Epigallocatechin-3-gallate (EGCG) has neuroprotective effects and the ability to resist amyloidosis. This study observed the protective effect of EGCG against neuronal injury in rat models of middle cerebral artery occlusion (MCAO) and investigated the mechanism of action of PI3K/AKT/eNOS signaling pathway. Methods Rat models of permanent MCAO were established using the suture method. Rat behavior was measured using neurological deficit score. Pathology and apoptosis were measured using HE staining and TUNEL. Oxidative stress and brain injury markers were examined using ELISA. Apoptosis-related proteins and PI3K/AKT/eNOS signaling pathway were determined using western blot assay and immunohistochemistry. Results EGCG decreased neurological function score, protected nerve cells, inhibited neuronal apoptosis, and inhibited oxidative stress injury and brain injury markers level after MCAO. EGCG reduced the apoptotic rate of neurons, increased the expression of Bcl-2, and decreased the expression of Caspase-3 and Bax. After LY294002 suppressed the PI3K pathway, the protective effect of EGCG decreased after administration of PI3K inhibitors. Conclusion EGCG has a protective effect on rat brain injury induced by MCAO, possibly by modulating the PI3K/AKT/eNOS signaling pathway.
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19
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Kian K, Khalatbary AR, Ahmadvand H, Karimpour Malekshah A, Shams Z. Neuroprotective effects of (−)-epigallocatechin-3-gallate (EGCG) against peripheral nerve transection-induced apoptosis. Nutr Neurosci 2018; 22:578-586. [DOI: 10.1080/1028415x.2017.1419542] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kosar Kian
- Molecular and Cell Biology Research Center, Department of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Ali Reza Khalatbary
- Molecular and Cell Biology Research Center, Department of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hassan Ahmadvand
- Department of Biochemistry, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
- Razi Herbal Researches Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Abbasali Karimpour Malekshah
- Molecular and Cell Biology Research Center, Department of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Zahra Shams
- Molecular and Cell Biology Research Center, Department of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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20
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Ruzicka J, Urdzikova LM, Svobodova B, Amin AG, Karova K, Dubisova J, Zaviskova K, Kubinova S, Schmidt M, Jhanwar-Uniyal M, Jendelova P. Does combined therapy of curcumin and epigallocatechin gallate have a synergistic neuroprotective effect against spinal cord injury? Neural Regen Res 2018; 13:119-127. [PMID: 29451216 PMCID: PMC5840977 DOI: 10.4103/1673-5374.224379] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Systematic inflammatory response after spinal cord injury (SCI) is one of the factors leading to lesion development and a profound degree of functional loss. Anti-inflammatory compounds, such as curcumin and epigallocatechin gallate (EGCG) are known for their neuroprotective effects. In this study, we investigated the effect of combined therapy of curcumin and EGCG in a rat model of acute SCI induced by balloon compression. Immediately after SCI, rats received curcumin, EGCG, curcumin + EGCG or saline [daily intraperitoneal doses (curcumin, 6 mg/kg; EGCG 17 mg/kg)] and weekly intramuscular doses (curcumin, 60 mg/kg; EGCG 17 mg/kg)] for 28 days. Rats were evaluated using behavioral tests (the Basso, Beattie, and Bresnahan (BBB) open-field locomotor test, flat beam test). Spinal cord tissue was analyzed using histological methods (Luxol Blue-cresyl violet staining) and immunohistochemistry (anti-glial fibrillary acidic protein, anti-growth associated protein 43). Cytokine levels (interleukin-1β, interleukin-4, interleukin-2, interleukin-6, macrophage inflammatory protein 1-alpha, and RANTES) were measured using Luminex assay. Quantitative polymerase chain reaction was performed to determine the relative expression of genes (Sort1, Fgf2, Irf5, Mrc1, Olig2, Casp3, Gap43, Gfap, Vegf, NfκB, Cntf) related to regenerative processes in injured spinal cord. We found that all treatments displayed significant behavioral recovery, with no obvious synergistic effect after combined therapy of curcumin and ECGC. Curcumin and EGCG alone or in combination increased axonal sprouting, decreased glial scar formation, and altered the levels of macrophage inflammatory protein 1-alpha, interleukin-1β, interleukin-4 and interleukin-6 cytokines. These results imply that although the expected synergistic response of this combined therapy was less obvious, aspects of tissue regeneration and immune responses in severe SCI were evident.
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Affiliation(s)
- Jiri Ruzicka
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídenská, Prague, Czech Republic
| | - Lucia Machova Urdzikova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídenská, Prague, Czech Republic
| | - Barbora Svobodova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic
| | | | - Kristyna Karova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic
| | - Jana Dubisova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic
| | - Kristyna Zaviskova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic
| | - Sarka Kubinova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídenská, Prague, Czech Republic
| | | | | | - Pavla Jendelova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic
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Bimonte S, Cascella M, Schiavone V, Mehrabi-Kermani F, Cuomo A. The roles of epigallocatechin-3-gallate in the treatment of neuropathic pain: an update on preclinical in vivo studies and future perspectives. DRUG DESIGN DEVELOPMENT AND THERAPY 2017; 11:2737-2742. [PMID: 29066865 PMCID: PMC5604557 DOI: 10.2147/dddt.s142475] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Neuropathic pain (NP) is a complex and chronic disease caused by lesions or defects of the somatosensory nervous system. The treatments normally used for managing NP usually lack efficacy. Several animal models of NP have been engineered in order to understand the molecular mechanisms underlying NP and to find alternative molecules to use as new therapeutic agents. Preclinical in vivo studies identified the epigallocatechin-3-gallate (EGCG), a main active component of green tea (Camellia sinensis), as a possible therapeutic molecule for NP treatment due to its anti-inflammatory and antioxidant properties. Interestingly, it has been shown that EGCG reduced bone cancer pain. The purpose of this article is to discuss the potential use of EGCG for control and treatment of NP, by reviewing the preclinical studies reported in the literature and by shedding light on the potential schemes based on EGCG’s application in clinical practices.
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Affiliation(s)
- Sabrina Bimonte
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori - IRCCS - "Fondazione G. Pascale", Naples, Italy
| | - Marco Cascella
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori - IRCCS - "Fondazione G. Pascale", Naples, Italy
| | - Vincenzo Schiavone
- Division of Anesthesia and Intensive Care, Hospital "Pineta Grande", Castel Volturno, Caserta, Italy
| | | | - Arturo Cuomo
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori - IRCCS - "Fondazione G. Pascale", Naples, Italy
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22
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Machova Urdzikova L, Ruzicka J, Karova K, Kloudova A, Svobodova B, Amin A, Dubisova J, Schmidt M, Kubinova S, Jhanwar-Uniyal M, Jendelova P. A green tea polyphenol epigallocatechin-3-gallate enhances neuroregeneration after spinal cord injury by altering levels of inflammatory cytokines. Neuropharmacology 2017; 126:213-223. [PMID: 28899730 DOI: 10.1016/j.neuropharm.2017.09.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 08/30/2017] [Accepted: 09/04/2017] [Indexed: 01/03/2023]
Abstract
Spinal cord injury (SCI) is a debilitating condition which is characterized by an extended secondary injury due to the presence of inflammatory local milieu. Epigallocatechin gallate (EGCG) appears to possess strong neuroprotective properties. Here, we evaluated the beneficial effect of EGCG on recovery from SCI. Male Wistar rats were given either EGCG or saline directly to the injured spinal cord and thereafter a daily IP injection. Behavior recovery was monitored by BBB, plantar, rotarod and flat-beam tests. The levels of inflammatory cytokines were determined on days 1, 3, 7, 10 and 14 after SCI. Additionally, NF-κB pathway activity was evaluated. The results demonstrated that EGCG-treated rats displayed a superior behavioral performance in a flat beam test, higher axonal sprouting and positive remodelation of glial scar. Cytokine analysis revealed a reduction in IL-6, IL2, MIP1α and RANTES levels on days 1 and 3, and an upregulation of IL-4, IL-12p70 and TNFα 1 day following SCI in EGCG-treated rats. Treatment with EGCG was effective in decreasing the nuclear translocation of subunit p65 (RelA) of the NF-κB dimer, and therefore canonical NF-κB pathway attenuation. A significant increase in the gene expression of growth factors (FGF2 and VEGF), was noted in the spinal cord of EGCG-treated rats. Further, EGCG influenced expression of M1 and M2 macrophage markers. Our results have demonstrated a therapeutic value of EGCG in SCI, as observed by better behavioral performance measured by flat beam test, modulation of inflammatory cytokines and induction of higher axonal sprouting.
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Affiliation(s)
- Lucia Machova Urdzikova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic.
| | - Jiri Ruzicka
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic.
| | - Kristyna Karova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic.
| | - Anna Kloudova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic.
| | - Barbora Svobodova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic.
| | | | - Jana Dubisova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic.
| | | | - Sarka Kubinova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic.
| | | | - Pavla Jendelova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague, Czech Republic; Department of Neuroscience, Charles University, Second Faculty of Medicine, Prague, Czech Republic.
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Evaluation of Epigallocatechin-3-gallate Modified Collagen Membrane and Concerns on Schwann Cells. BIOMED RESEARCH INTERNATIONAL 2017; 2017:9641801. [PMID: 28894753 PMCID: PMC5574217 DOI: 10.1155/2017/9641801] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/05/2017] [Accepted: 07/05/2017] [Indexed: 02/05/2023]
Abstract
Collagen is an essential component of the extracellular matrix (ECM) and is a suitable material for nerve repair during tissue remodeling for fracture repair. Epigallocatechin-3-gallate (EGCG), an extract of green tea, shows various biological activities that are beneficial to nerve repair. Here, we developed modified collagen containing different concentrations of EGCG (0.0064%, 0.064%, and 0.64%, resp.) to induce Schwann cell proliferation and differentiation. Cell Counting Kit-8 test, live/dead assay, and SEM showed that collagen cross-linked by EGCG induced Schwann cell proliferation. Real-time polymerase chain reaction, enzyme-linked immunosorbent assay, and Western blotting revealed that EGCG-modified collagen induced Schwann cell differentiation and downregulated reactive oxygen species (ROS) levels by downregulating the MAPK P38 signaling pathway. Our results indicate that collagen cross-linked with an appropriate concentration of EGCG induces the proliferation and differentiation of Schwann cells. The EGCG-modified collagen membrane may be applicable for nerve repair and guided tissue regeneration applications.
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Qi S, Wang C, Song D, Song Y, Dunaief JL. Intraperitoneal injection of (-)-Epigallocatechin-3-gallate protects against light-induced photoreceptor degeneration in the mouse retina. Mol Vis 2017; 23:171-178. [PMID: 28458506 PMCID: PMC5367892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 03/22/2017] [Indexed: 11/25/2022] Open
Abstract
PURPOSE (-)-epigallocatechin-3-gallate (EGCG), a major catechin component of green tea, is reported to delay or prevent certain forms of cancer, arthritis, cardiovascular disease, and neurodegenerative disorders. In this study, we determined if systemically administered EGCG could protect the retina against light damage (LD) in mice. METHODS BALB/cJ mice were treated with either EGCG or saline via intraperitoneal (IP) injection, and then placed under constant cool white light-emitting diode (LED) light (10,000 lux) for 5 h. Retinal structure and function were evaluated using optical coherence tomography (OCT), histology, and electroretinography (ERG) 7 days after LD. In addition, the mRNAs of several oxidative stress genes were quantified by qPCR before LD and 24 h after LD. RESULTS OCT and photomicrographs of mouse retinas showed morphologic protection of photoreceptors. Mice in the EGCG group had significantly higher ERG amplitudes for all three wave types compared with mice in the saline control group, which indicated that EGCG protected retinal function. Furthermore, qPCR results showed that EGCG administration can increase the mRNA level of the antioxidant gene Sod2 before LD and 24 h after LD. CONCLUSIONS The IP injection of EGCG attenuated the detrimental effects of bright light on the retinas of BALB/cJ mice by protecting the structure and function of the retina.
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Affiliation(s)
- Shounan Qi
- Department of Ophthalmology, The Second Hospital of Jilin University, Jilin, China,F. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Chenguang Wang
- Department of Ophthalmology, The Second Hospital of Jilin University, Jilin, China,F. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Delu Song
- F. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ying Song
- F. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Joshua L. Dunaief
- F. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania
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25
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Bosch-Mola M, Homs J, Álvarez-Pérez B, Puig T, Reina F, Verdú E, Boadas-Vaello P. (-)-Epigallocatechin-3-Gallate Antihyperalgesic Effect Associates With Reduced CX3CL1 Chemokine Expression in Spinal Cord. Phytother Res 2016; 31:340-344. [DOI: 10.1002/ptr.5753] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/01/2016] [Accepted: 11/07/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Marc Bosch-Mola
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
| | - Judit Homs
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
- Department of Physical Therapy; EUSES - Universitat de Girona; Girona Spain
| | - Beltrán Álvarez-Pérez
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
| | - Teresa Puig
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
| | - Francisco Reina
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
| | - Enrique Verdú
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
| | - Pere Boadas-Vaello
- Research Group of Clinical Anatomy, Embryology and Neuroscience (NEOMA), Department of Medical Sciences; Universitat de Girona; Girona Spain
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Tao L, Ding Q, Gao C, Sun X. Resveratrol attenuates neuropathic pain through balancing pro-inflammatory and anti-inflammatory cytokines release in mice. Int Immunopharmacol 2016; 34:165-172. [PMID: 26953646 DOI: 10.1016/j.intimp.2016.02.033] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 02/24/2016] [Accepted: 02/29/2016] [Indexed: 01/07/2023]
Abstract
Anti-inflammatory activity of resveratrol has been widely studied, while its beneficial effect on the management of neuropathic pain, a refractory chronic syndrome with pro-inflammation implicated in, is very little investigated. In the present study, the effects of different doses and various time window of administration of resveratrol were explored in a neuropathic mouse model of chronic constriction injury (CCI) of the sciatic nerve. It was demonstrated that pretreatment of resveratrol (5, 10, 20 and 40 mg/kg) for 7 consecutive days before CCI did not alleviate neuropathic pain, while it clearly relieved the pain when administrated after CCI and such pain relief effect was more pronounced when administrated right after the peak of pain symptom at day 7 after CCI, as evidenced by the alleviation of thermal hyperalgesia and mechanical allodynia. Such a beneficial effect of resveratrol was in a dose-dependent manner. Mechanistic study showed that resveratrol repressed the expression of pro-inflammatory cytokines, including TNF-α, IL-1β and IL-6, and promoted the expression of anti-inflammatory cytokine IL-10 at the same time, which was further confirmed in a cell model of microglia. It was also shown that neuropathic pain inversely correlated with pro-inflammatory cytokines, such as TNF-α, IL-1β and IL-6, but not with anti-inflammatory cytokine IL-10 in all experimental mice from Spearman correlation coefficient. Our study reveals that resveratrol displays a significant neuropathic pain relief effect and paved a way for novel treatment of chronic pain.
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Affiliation(s)
- Lei Tao
- Department of Anesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Qian Ding
- Department of Anesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Changjun Gao
- Department of Anesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
| | - Xude Sun
- Department of Anesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
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Boadas-Vaello P, Verdú E. Epigallocatechin-3-gallate treatment to promote neuroprotection and functional recovery after nervous system injury. Neural Regen Res 2015; 10:1390-2. [PMID: 26604890 PMCID: PMC4625495 DOI: 10.4103/1673-5374.165502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Pere Boadas-Vaello
- Research Group of Clinical Anatomy, Embryology, and Neuroscience (NEOMA), Universitat de Girona, Faculty of Medicine, Department of Medical Sciences, Girona, Spain
| | - Enrique Verdú
- Research Group of Clinical Anatomy, Embryology, and Neuroscience (NEOMA), Universitat de Girona, Faculty of Medicine, Department of Medical Sciences, Girona, Spain
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28
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Li Q, Zhang X. Epigallocatechin-3-gallate attenuates bone cancer pain involving decreasing spinal Tumor Necrosis Factor-α expression in a mouse model. Int Immunopharmacol 2015; 29:818-823. [PMID: 26363974 DOI: 10.1016/j.intimp.2015.08.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/19/2015] [Accepted: 08/27/2015] [Indexed: 11/30/2022]
Abstract
Tumor metastasis to bone often elicits a wide array of symptoms, in which pain is a significant factor in catastrophic complications of bone cancer. The complete understanding of bone cancer-related pain is still unknown, while several pathophysiological components have been suggested, from tumor-stimulated osteolysis, nerve compression, stimulations of ion channels, and locally generated inflammatory cytokines. In particular, it has been shown that pro-inflammatory cytokine TNFα-mediated actions are necessary for the development of bone cancer pain. As a member of catechin family in green tea extracts, EGCG (Epigallocatechin-3-gallate) can reduce excess free radicals and attenuate overactive inflammatory signaling including TNFα. In addition, EGCG or its related molecules have been used to control neuropathic pain in various preclinical settings. However, its potential use in bone cancer-caused pain has not yet been reported. Here we show that treating a mouse model of bone cancer by EGCG, results in a dramatic reduction in pain behavior and a significant decrease of TNFα expression within the spinal cord of tumor-bearing mice. Thus, this study reveals an anti-nociceptive role for EGCG in the progression of pain caused by tumor bone metastasis, and highlights a potential scheme by using anti-TNFα as a therapeutic option for osteolytic pain.
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Affiliation(s)
- Qingsong Li
- Department of Anesthesiology, The Second Hospital of Shandong University, No. 247 Beiyuan Road, Jinan 250033, China.
| | - Xi Zhang
- Department of Anesthesiology, The Second Hospital of Shandong University, No. 247 Beiyuan Road, Jinan 250033, China
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