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Fukuyama Y, Kubo M, Harada K. Neurotrophic Natural Products. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2024; 123:1-473. [PMID: 38340248 DOI: 10.1007/978-3-031-42422-9_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
Neurotrophins (NGF, BDNF, NT3, NT4) can decrease cell death, induce differentiation, as well as sustain the structure and function of neurons, which make them promising therapeutic agents for the treatment of neurodegenerative disorders. However, neurotrophins have not been very effective in clinical trials mostly because they cannot pass through the blood-brain barrier owing to being high-molecular-weight proteins. Thus, neurotrophin-mimic small molecules, which stimulate the synthesis of endogenous neurotrophins or enhance neurotrophic actions, may serve as promising alternatives to neurotrophins. Small-molecular-weight natural products, which have been used in dietary functional foods or in traditional medicines over the course of human history, have a great potential for the development of new therapeutic agents against neurodegenerative diseases such as Alzheimer's disease. In this contribution, a variety of natural products possessing neurotrophic properties such as neurogenesis, neurite outgrowth promotion (neuritogenesis), and neuroprotection are described, and a focus is made on the chemistry and biology of several neurotrophic natural products.
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Affiliation(s)
- Yoshiyasu Fukuyama
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, 770-8514, Japan.
| | - Miwa Kubo
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, 770-8514, Japan
| | - Kenichi Harada
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, 770-8514, Japan
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Hang S, Wu W, Wang Y, Sheng R, Fang Y, Guo R. Daphnetin, a Coumarin in Genus Stellera Chamaejasme Linn: Chemistry, Bioactivity and Therapeutic Potential. Chem Biodivers 2022; 19:e202200261. [PMID: 35880614 DOI: 10.1002/cbdv.202200261] [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: 03/25/2022] [Accepted: 07/26/2022] [Indexed: 11/05/2022]
Abstract
Coumarins is a huge family of phenolic compounds containing a common structure of 2 H -1-benzopyran-2-one. Nowadays, more than 1,300 natural-based coumarins have been identified in a variety of plants, bacteria and fungi, many of them exhibited promising biomedical performance. Daphnetin (7,8-dihydroxycoumarin) is a typical coumarin associated with a couple of bioactivities such as anti-cancer, antibacterial, anti-inflammatory and anti-arthritis. In the treatment of diseases, it has been verified that daphnetin has outstanding therapeutic effects on diabetes, arthritis, transplant rejection, cancer and even on central nervous system diseases. Herein, we summarized the chemical synthetic methodologies, bioactivities, therapeutic potentials and structure-activity relationships of daphnetin and its derivatives. Hopefully, this review would be beneficial for the discovery of new coumarin-based biomedicine in the near future.
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Affiliation(s)
- Sijin Hang
- Shanghai Ocean University, College of food science and technology, Shanghai Ocean University,No.999,Huchenghuan Road,Shanghai,P.R.China, Shanghai, CHINA
| | - Wenhui Wu
- Shanghai Ocean University, College of food science and technology, Shanghai Ocean University,No.999,Huchenghuan Road,Shanghai,P.R.China, Shanghai, CHINA
| | - Yinan Wang
- Shanghai Ocean University, College of food science and technology, Shanghai Ocean University,No.999,Huchenghuan Road,Shanghai,P.R.China, Shanghai, CHINA
| | - Ruilong Sheng
- Shanghai Ocean University, College of food science and technology, Shanghai Ocean University,No.999,Huchenghuan Road,Shanghai,P.R.China, Shanghai, CHINA
| | - Yiwen Fang
- Shantou University, Chemistry, College of Science, Department of Chemistry, College of Science, Shantou University, Shantou 515063,, Shanghai, CHINA
| | - Ruihua Guo
- Shanghai Ocean University, College of fisheries and life science, Shanghai Ocean University,No.999,Huchenghuan Road,Shanghai,P.R.China, 201306, Shanghai, CHINA
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Yan L, Jin Y, Pan J, He X, Zhong S, Zhang R, Choi L, Su W, Chen J. 7,8-Dihydroxycoumarin Alleviates Synaptic Loss by Activated PI3K-Akt-CREB-BDNF Signaling in Alzheimer's Disease Model Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:7130-7138. [PMID: 35657168 PMCID: PMC9204815 DOI: 10.1021/acs.jafc.2c02140] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/15/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder and is clinically characterized by the impairment of memory and cognition. Accumulation of β-amyloid (Aβ) in the brain is considered as a key process in the development of AD because it impairs the synapses' function to impair memory formation. Recent research studies have indicated that a group of edible plant-derived Thymelaeaceae compounds known as coumarin may exert particularly powerful actions on alleviating learning and memory impairment. 7,8-Dithydroxycoumarin (7,8-DHC), a bioactive component of coumarin derived from Thymelaeaceae, showed its function in neuroprotection before. In this study, we found that 7,8-DHC was able to mitigate Aβ accumulation via reducing the level of BACE1 and increasing the level of ADAM17 and ADAM10. More importantly, we found that 7,8-DHC could mitigate memory impairment, promote the dendrite branch density, and increase synaptic protein expression via activating PI3K-Akt-CREB-BDNF signaling. Hence, these results suggested that 7,8-DHC represented a novel bioactive therapeutic agent in mitigating Aβ deposition and synaptic loss in the process of treating AD.
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Affiliation(s)
- Li Yan
- Formula-Pattern
Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
| | - Yufan Jin
- Guangdong
Engineering & Technology Research Center for Quality and Efficacy
Reevaluation of Post-Market Traditional Chinese Medicine, Guangdong
Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, No. 135, Xingang Xi Road, Guangzhou 510275, China
| | - Junping Pan
- Department
of Pharmacology, School of Basic Medicine, Jinan University, Guangzhou 510632, China
| | - Xiang He
- Guangdong
Engineering & Technology Research Center for Quality and Efficacy
Reevaluation of Post-Market Traditional Chinese Medicine, Guangdong
Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, No. 135, Xingang Xi Road, Guangzhou 510275, China
| | - Shiqian Zhong
- International
School, Jinan University, No. 601, West Huangpu Avenue, Guangzhou 510632, China
| | - Rongcai Zhang
- International
School, Jinan University, No. 601, West Huangpu Avenue, Guangzhou 510632, China
| | - LokLam Choi
- International
School, Jinan University, No. 601, West Huangpu Avenue, Guangzhou 510632, China
| | - Weiwei Su
- Guangdong
Engineering & Technology Research Center for Quality and Efficacy
Reevaluation of Post-Market Traditional Chinese Medicine, Guangdong
Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, No. 135, Xingang Xi Road, Guangzhou 510275, China
| | - Jiaxu Chen
- Formula-Pattern
Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China
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Sun H, Li Q, Zhang L, Su Z, Li J, Cao J. Effects of 7,8-dihydroxycoumarin on the myelin morphological changes and PSD-95 protein expression in Balb/c mice after sciatic nerve injury. Neuroreport 2021; 32:1198-1205. [PMID: 34406992 DOI: 10.1097/wnr.0000000000001712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To investigate the effects of 7,8-dihydroxycoumarin on the myelin morphological changes and PSD-95 protein expression in mice with sciatic nerve injury, and to explore the relationship between PSD-95 protein and myelin regeneration after nerve myelin injury. METHODS One hundred twenty-seven male adult Balb/c mice were selected and randomly divided into high, medium and low 7,8-dihydroxycoumarin dose groups and blank control group. Anastomosis was then carried out for the amputated right sciatic nerve, and intraperitoneal injection of 7,8-dihydroxycoumarin was applied postoperatively. At weeks 1, 2, 4 and 8 after surgery, nervous tissues from the injury side were taken for immunohistochemical Luxol Fast Blue staining, so as to observe the morphological changes of the locally injured nerve myelin. Meanwhile, PSD-95 mRNA and protein expression were determined using real-time PCR and western blotting. RESULTS The nerve myelin recovery in injury side of mice at all time points showed a definite dose-effect relationship with the dose of 7,8-dihydroxycoumarin. Moreover, 7,8-dihydroxycoumarin could inhibit the PSD-95 mRNA level and protein expression. At the same time, there was a dose-effect of the inhibition. CONCLUSIONS 7,8-Dihydroxycoumarin can affect nerve recovery in mice with sciatic nerve injury, which shows a definite dose-effect relationship with its dose. Besides, PSD-95 protein expression can suppress the regeneration of the injured nerve myelin.
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Affiliation(s)
- Huiyan Sun
- Forensic Clinical Medince, Shanghai Key Lab of Forensic Medicine, Key Lab of Forensic Science, Ministry of Justice (Academy of Forensic Science)
- Department of Neurology, Affiliated Hospital of Chifeng University
| | - Qiang Li
- Department of Neurology, Affiliated Hospital of Chifeng University
| | | | | | - Jinlong Li
- Institute of Orthopedic Diseases, Affiliated Hospital of Chifeng University, Chifeng, China
| | - Jian Cao
- Institute of Orthopedic Diseases, Affiliated Hospital of Chifeng University, Chifeng, China
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Mechanistic interplay of various mediators involved in mediating the neuroprotective effect of daphnetin. Pharmacol Rep 2021; 73:1220-1229. [PMID: 33860917 DOI: 10.1007/s43440-021-00261-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 03/11/2021] [Accepted: 04/02/2021] [Indexed: 12/20/2022]
Abstract
Daphnetin is a 7, 8 dihydroxy coumarin isolated from different medicinal plants of the Thymelaeaceae family and exhibits copious pharmacological activities including neuroprotection, anti-cancer, anti-malarial, anti-inflammatory, anti-parasitic and anti-arthritic activity. It has been proved to be an effective neuroprotective agent in several preclinical animal studies and cell line examinations. It is found to interact with different cellular mediators and signaling pathways to confer protection against neurodegeneration. The reactive oxygen species and inflammatory mediators are the major culprits of different neurodegenerative diseases. Oxidative stress activates the pro-apoptotic proteins and inhibits anti-apoptotic proteins, leading to neuronal cell death. Daphnetin restores cellular redox balance by upregulating the antioxidants level (GSH and SOD), anti-apoptotic protein (Bcl-2), as well as by reducing the levels of proinflammatory cytokines, executioner caspase-3, pro-apoptotic-Bax, and oxidative stress markers. Furthermore, activation of Nrf-2/HO-1 signaling and upregulation of HSP-70 governs the protection elicited by daphnetin against oxidative stress-induced neuronal apoptosis. Daphnetin modulated inhibition of JNK-MAPK, JAK-STAT, and TLR-4/NF-κB signaling pathways also contributed to its neuroprotective effect. The positive effects of daphnetin have been also related to its AChE, BChE, and BACE-1 inhibitory potential. The present review has been designed to explore the mechanistic interplay of various mediators in mediating the neuroprotective effects of daphnetin.
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Zhi J, Duan B, Pei J, Wu S, Wei J. Daphnetin protects hippocampal neurons from oxygen-glucose deprivation-induced injury. J Cell Biochem 2018; 120:4132-4139. [PMID: 30260007 DOI: 10.1002/jcb.27698] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/27/2018] [Indexed: 12/26/2022]
Abstract
Daphnetin, a coumarin derivative extracted from Daphne odora var., was reported to possess a neuroprotective effect. Recently, it has been demonstrated that daphnetin attenuates ischemia/reperfusion (I/R) injury. However, the role of daphnetin in cerebral I/R injury and the potential mechanism have not been fully understood. The present study aimed to explore the regulatory roles of daphnetin on oxygen-glucose deprivation/reoxygenation (OGD/R)-induced cell injury in a model of hippocampal neurons. Our results demonstrated that daphnetin improved cell viability and reduced the lactate dehydrogenase leakage in OGD/R-stimulated hippocampal neurons. In addition, daphnetin inhibited oxidative stress and cell apoptosis in hippocampal neurons after OGD/R stimulation. Furthermore, daphnetin significantly enhanced the nuclear translocation of the nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) expression in hippocampal neurons exposed to OGD/R. Knockdown of Nrf2 blocked the protective effect of daphnetin on OGD/R-induced hippocampal neurons. In conclusion, these findings demonstrated that daphnetin attenuated oxidative stress and neuronal apoptosis after OGD/R injury through the activation of the Nrf2/HO-1 signaling pathway in hippocampal neurons. Thus, daphnetin may be a novel therapeutic agent for cerebral I/R injury.
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Affiliation(s)
- Jin Zhi
- Department of Neurology, Xi'an NO.1 Hospital, Xi'an, China
| | - Bin Duan
- Hemodialysis Centre of Nephrosis, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Jiwen Pei
- Department of Traditional Chinese Medicine, Xi'an City Hospital of TCM, Xi'an, China
| | - Songdi Wu
- Department of Neurology, Xi'an NO.1 Hospital, Xi'an, China
| | - Junli Wei
- Department of Neurology, The Fourth Hospital of Xi'an City, Xi'an, China
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Jameel E, Umar T, Kumar J, Hoda N. Coumarin: A Privileged Scaffold for the Design and Development of Antineurodegenerative Agents. Chem Biol Drug Des 2015; 87:21-38. [PMID: 26242562 DOI: 10.1111/cbdd.12629] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/25/2015] [Accepted: 07/21/2015] [Indexed: 12/23/2022]
Abstract
Drug development for neurodegenerative diseases (NDs) is foremost task for the medicinal chemists in the 21st century. Coumarins are exemplary of an assorted and aptitudinally useful set of drugs. Coumarins play a momentous role in several pharmacological and medicinal aspects. Its analogues are anticipated to play a significant role in the development of new therapeutic leads for NDs. Their promising applications in the field of ND medication are exemplified by clinical candidates such as nodakenin that have been potent for demoting memory impairment. Apart from ND, clinically used anticoagulant warfarin, anticoagulant dicoumarol, and antibiotic coumermycin, novobiocin and chartesium grab the interest of researchers in coumarins. It would be worthwhile to look at the different biological processes that could cause neurodegeneration, thereby establishing a link with distinct coumarin derivatives to serve the purpose of medication. This review undertakes estimation of the wide spectrum of studies focusing coumarin to the domain of drug research for ND. Herein, we search for multitarget coumarin-based inhibitors and their scope for NDs. Future challenges in coumarin-based drug development have been discussed, and emphases have been laid on the future perspectives of coumarins as possible drugs in the future for the treatment of NDs.
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Affiliation(s)
- Ehtesham Jameel
- Department of Chemistry, B. R. Ambedkar Bihar University, Muzaffarpur 842001, Bihar, India
| | - Tarana Umar
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, 110025, India
| | - Jitendra Kumar
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, 110025, India
| | - Nasimul Hoda
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, 110025, India
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Wen M, Yan Y, Yan N, Chen XS, Liu SY, Feng ZH. Upregulation of RBFOX1 in the malformed cortex of patients with intractable epilepsy and in cultured rat neurons. Int J Mol Med 2015; 35:597-606. [PMID: 25571999 PMCID: PMC4314424 DOI: 10.3892/ijmm.2015.2061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Accepted: 12/22/2014] [Indexed: 02/07/2023] Open
Abstract
Mutations in RNA-binding Fox 1 (RBFOX1) are known to be associated with neurodevelopmental disorders including epilepsy, mental retardation and autism spectrum disorder. The deletion of the Rbfox1 gene in mice has been shown to result in heightened susceptibility to seizures. However, other studies have revealed mutations or the downregulation of RBFOX1 in specimens obtained from patients with epilepsy or malformations of cortical development (MCD). Generally, the expression of RBFOX1 varies according to tissue type. In this study, we demonstrated the upregulation of RBFOX1 protein in the cortex of patients with MCD and intractable epilepsy. Electrophysiological recordings of cultured rat cortical neurons with increased Rbfox1 expression also revealed a significantly increased amplitude of action potential (AP) and Na+ current density. Some of these neurons (26.32%) even displayed spontaneous, recurrent, epileptiform discharges (SREDs). Additionally, certain Rbfox1 target transcripts associated with epilepsy, including glutamate receptor, ionotropic, N-methyl D-aspartate 1 [Grin1, also known as N-methyl-D-aspartate receptor subunit NR1 (NMDAR1)], synaptosomal-associated protein, 25 kDa (SNAP-25 or Snap25) and sodium channel, voltage gated, type VIII, alpha subunit (Scn8a, also known as Nav1.6) were identified to be upregulated in these cultured cortical neurons with an upregulated Rbfox1 expression. These data suggest that the upregulation of RBFOX1 contributes to neuronal hyperexcitation and seizures. The upregulation of NMDAR1 (Grin1), SNAP-25 (Snap25) and Scn8a may thus be involved in Rbfox1-related neuronal hyperexcitation.
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Affiliation(s)
- Ming Wen
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, P.R. China
| | - Yong Yan
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, P.R. China
| | - Ning Yan
- Department of Neurology, University‑Town Hospital of Chongqing Medical University, Chongqing 401331, P.R. China
| | - Xiao Shan Chen
- Department of Neurology, Xi'an Central Hospital, Xi'an 710003, P.R. China
| | - Shi Yong Liu
- Department of Neurosurgery, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Zhan Hui Feng
- Department of Neurology, Affiliated Hospital of Guiyang Medical University, Guiyang 550004, P.R. China
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Yang L, Yang Q, Zhang K, Li YJ, Wu YM, Liu SB, Zheng LH, Zhao MG. Neuroprotective effects of daphnetin against NMDA receptor-mediated excitotoxicity. Molecules 2014; 19:14542-55. [PMID: 25225718 PMCID: PMC6271359 DOI: 10.3390/molecules190914542] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 08/04/2014] [Accepted: 08/06/2014] [Indexed: 01/27/2023] Open
Abstract
The accumulation of glutamate can excessively activate the N-methyl-d-aspartate (NMDA) receptors and cause excitotoxicity. Daphnetin (Dap), a coumarin derivative, is a protein kinase inhibitor that exhibits antioxidant and neuroprotective properties. However, little is known about the neuroprotective effects of Dap on glutamate-induced excitotoxicity. We evaluated the neuroprotective activities in the primary cultured cortical neurons against NMDA-induced excitotoxicity. Pretreatment with Dap significantly prevented NMDA-induced neuronal cell loss. Dap significantly inhibited the neuronal apoptosis by regulating balance of Bcl-2 and Bax expression. Furthermore, pretreatment of Dap reversed the up-regulation of NR2B-containing NMDA receptors and inhibited the intracellular Ca2+ overload induced by NMDA exposure. In addition, Dap prevented cerebral ischemic injury in mice induced via a 2 h middle cerebral artery occlusion and a 24 h reperfusion in vivo. The findings suggest that Dap prevents the excitotoxicity through inhibiting the NR2B-containing NMDA receptors and the subsequent calcium overload in cultured cortical neurons.
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Affiliation(s)
- Le Yang
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Qi Yang
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Kun Zhang
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Yu-Jiao Li
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Yu-Mei Wu
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Shui-Bing Liu
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
| | - Lian-He Zheng
- Department Department of Orthopaedics, Tangdu Hospital, Fourth Military Medical University, Xi’an 710032, China
- Authors to whom correspondence should be addressed; E-Mails: (L.-H.Z.); (M.-G.Z.); Tel.: +86-29-84774553 (M.-G.Z.); Fax: +86-29-84774552 (M.-G.Z.)
| | - Ming-Gao Zhao
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi’an 710032, China; E-Mails: (L.Y.); (Q.Y.); (K.Z.); (Y.-J.L.); (Y.-M.W.); (S.-B.L.)
- Authors to whom correspondence should be addressed; E-Mails: (L.-H.Z.); (M.-G.Z.); Tel.: +86-29-84774553 (M.-G.Z.); Fax: +86-29-84774552 (M.-G.Z.)
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Köktürk S, Ceylan S, Etus V, Yasa N, Ceylan S. Morinda citrifolia L. (noni) and memantine attenuate periventricular tissue injury of the fourth ventricle in hydrocephalic rabbits. Neural Regen Res 2014; 8:773-82. [PMID: 25206724 PMCID: PMC4146082 DOI: 10.3969/j.issn.1673-5374.2013.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 02/24/2013] [Indexed: 11/22/2022] Open
Abstract
This study was designed to evaluate the neuroprotective effects of Morinda citrifolia L. (Rubiaceae), commonly known as noni, and memantine (a N-methy-D-aspartate receptor inhibitor) on hydrocephalus-induced neurodegenerative disorders. Kaolin was injected into the cistern magna of male adult New Zealand rabbits to establish a hydrocephalus animal model. Memantine (20 mg/kg, intraperitoneally; memantine-treated group) or noni (5 mL/kg, intragastrically; noni-treated group) was administered daily for 2 weeks. Microtubule-associated protein-2 and caspase-3 immunohistochemistry were performed to detect neuronal degeneration and apoptosis in the periventricular tissue of the fourth ventricle of rabbits. Microtubule-associated protein-2 staining density was significantly decreased in the hydrocephalic group, while the staining density was significantly increased in the memantine- and noni-treated groups, especially in the noni-treated group. Noni treatment decreased the number of caspase-3-positive cells in rabbits with hydrocephalus, while memantine had no effect. These findings suggest that noni exhibits more obvious inhibitory effects on hydrocephalus-induced neurodegenerative disorders than memantine in periventricular tissue of the fourth ventricle.
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Affiliation(s)
- Sibel Köktürk
- Department of Histology and Embriyology, Faculty of Medicine, Ordu University, Ordu, Turkey
| | - Süreyya Ceylan
- Department of Histology and Embriyology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Volkan Etus
- Department of Neurosurgery, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Nezih Yasa
- Department of Neurosurgery, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Savaş Ceylan
- Department of Neurosurgery, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
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Du JS, Zhao Q, Zhang YL, Wang Y, Ma M. 7,8-dihydroxycoumarin may promote sciatic nerve regeneration by suppressing NF-κB expression in mice. Mol Med Rep 2013; 8:1525-30. [PMID: 24043116 DOI: 10.3892/mmr.2013.1682] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Accepted: 09/04/2013] [Indexed: 11/06/2022] Open
Abstract
Nuclear factor (NF)-κB expression occurs during sciatic injury. In addition, 7,8-dihydroxycoumarin exhibits a neurotrophic effect on peripheral nerve regeneration. To investigate the effects of 7,8-dihydroxycoumarin on the expression levels of NF-κB in L4-6 spinal cord segments of the injured sciatic nerve in mice and on the functional recovery and regeneration following nerve injury, a total of 160 healthy adult male BALB/c mice underwent unilateral sciatic nerve interruption and anastomosis. The mice were separated into groups and subsequently treated with physiological saline (control) or high, medium or low doses of 7,8-dihydroxycoumarin. NF-κB levels were detected by western blot analysis and quantitative polymerase chain reaction (qPCR), and the sciatic functional index (SFI) was measured. Neuronal apoptosis was detected by terminal-deoxynucleotidyl transferase dUTP-mediated nick-end labeling (TUNEL) staining. The results revealed that NF-κB was activated in the L4-6 spinal cord connected to the injured sciatic nerve. qPCR and western-blot analysis results showed that the expression levels of NF-κB in the high- and medium-dose groups were significantly lower compared with the low-dose and control groups at 12 h, one day, three days, five days and one week (P<0.05 for each). SFI and TUNEL results demonstrated that the high- and medium-dose groups exhibited improved functional nerve regeneration and reduced apoptosis compared with the low-dose and control groups. In conclusion, 7,8-dihydroxycoumarin is capable of suppressing the immune activation of NF-κB in the neurons of the L4-6 spinal cord connected with the injured sciatic nerve, thereby reducing the focal filtration of inflammatory cells, producing the optimum environment for nerve regeneration.
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Affiliation(s)
- Jian-Shi Du
- Department of Neurology, China-Japan Union Hospital, Jilin University, Changchun, Jilin 130033, P.R. China
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