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Moura MVN, Mesquita da Conceição Bahia G, Gonçalves Correa M, Araujo Sarges MA, Lobão TA, Sanches EM, Oliveira KRHM, Herculano AM, Bahia CP. Neuroprotective effects of crude extracts, compounds, and isolated molecules obtained from plants in the central nervous system injuries: a systematic review. Front Neurosci 2023; 17:1249685. [PMID: 37766783 PMCID: PMC10520969 DOI: 10.3389/fnins.2023.1249685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
The number of people with central nervous system (CNS) injuries increases worldwide and only a few therapies are used to mitigate neurological damage. Crude extracts, compounds, and isolated molecules obtained from plants have neuroprotective effects; however, their actions on the central nervous system are still not fully understood. This systematic review investigated the neuroprotective effects of crude extracts, compound, and isolated molecules obtained from plants in different CNS lesions. This PICO (Population/Problem, Intervention, Control, Outcome) systematic review included in vivo and in vitro studies that used small rodents as experimental models of CNS injuries (P) treated with crude extracts, compounds, and/or isolated molecules obtained from plants (I), compared to non-intervention conditions (C), and that showed a neuroprotective effect (O). Fourteen out of 5,521 studies were selected for qualitative analysis. Several neuroprotective effects (improvement of antioxidant activity, modulation of the inflammatory response, tissue preservation, motor and cognitive recovery) in the brain and spinal cord were reported after treatment with different doses of crude extracts (10 studies), compounds (2 studies), and isolated molecules (2 studies). Crude extracts, compounds, or isolated molecules obtained from plants showed promising neuroprotective effects against several CNS injuries in both the brain and spinal cord, regardless of gender and age, through the modulation of inflammatory activity and oxidative biochemistry, tissue preservation, and recovery of motor and cognitive activity.
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Affiliation(s)
- Maria Vitoria Nava Moura
- Laboratory of Neuroplasticity, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | | | - Marcio Gonçalves Correa
- Laboratory of Neuroplasticity, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | | | - Thaís Alves Lobão
- Laboratory of Neuroplasticity, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | - Erica Miranda Sanches
- Laboratory of Neuroplasticity, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | - Karen R. H. Matos Oliveira
- Laboratory of Experimental Neuropharmacology, Institute of Biological Sciences, Federal University of Pará, Belém, Brazil
| | - Anderson Manoel Herculano
- Laboratory of Experimental Neuropharmacology, Institute of Biological Sciences, Federal University of Pará, Belém, Brazil
| | - Carlomagno Pacheco Bahia
- Laboratory of Neuroplasticity, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
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Pak ME, Park YJ, Yang HJ, Hwang YH, Li W, Go Y. Samhwangsasim-tang attenuates neuronal apoptosis and cognitive decline through BDNF-mediated activation of tyrosin kinase B and p75-neurotrophin receptors. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 99:153997. [PMID: 35279612 DOI: 10.1016/j.phymed.2022.153997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 02/04/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Samhwangsasim-tang (SST) is a traditional medicine used to treat hypertension and arteriosclerosis. Additionally, due to the effects of its constituent herbs, SST is considered effective for memory-related disorders. PURPOSE We investigated the effects of SST on neuronal survival and memory in glutamate-induced hippocampal cells and in a mouse model of scopolamine-induced memory impairment. METHODS SST components were identified using 3D-ultra performance liquid chromatography (3D-UPLC). In vitro, we induced glutamate-induced excitotoxicity in HT22 cells after SST pretreatment. We used a cell counting kit-8 and cell cytotoxicity assay, flow cytometry, and western blotting to test the protective effects of SST on neuronal death. In vivo, C57BL/6J mice were administered with 150 and 300 mg/kg SST once daily for 7 days and then intraperitoneally injected with 1 mg/kg scopolamine for 7 days to induce cognitive impairment. We then measured cognitive behavior using a novel object recognition test (NORT) and passive avoidance test (PAT) and analyzed the histological and protein changes. RESULTS Our results showed that treatment with 50 and 100 μg/ml SST provided significant protection against glutamate-induced cell death. Flow cytometry and western blotting results suggested that 100 μg/ml SST treatment reduced oxidative stress and mitochondrial dysfunction. SST treatment also increased brain-derived neurotrophic factor (BDNF), its receptor, TrkB receptor, and cAMP-response element binding protein (CREB) activation while reducing the P75NTR and JNK signaling activation. Our in vivo results showed that SST administration improved cognitive impairment, similar to donepezil treatment (as a positive control), in NORT and PAT. SST and donepezil decreased neuronal cell death and apoptosis, and acetylcholine levels were increased in the scopolamine-treated hippocampus. Additionally, SST promoted CREB phosphorylation and BDNF maturation while reducing JNK and P75NTR activation; in contrast, donepezil did not alter levels of these proteins in the scopolamine-treated mouse hippocampus. CONCLUSION Our results suggest that SST has neuroprotective effects to attenuate neuronal cell death and oxidative stress through CREB/JNK signaling via BDNF activation. SST may regulate endogenous survival factors in the hippocampus, which may be a safe and potential clinical treatment for cognitive impairment in AD.
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Affiliation(s)
- Malk Eun Pak
- Korean medicine (KM)-Application Center, Korea Institute of Oriental Medicine, Daegu 41062, Republic of Korea
| | - Yeo Jin Park
- Korean medicine (KM)-Application Center, Korea Institute of Oriental Medicine, Daegu 41062, Republic of Korea; Korean Convergence Medicine, University of Science and Technology, Daejeon 34054, Republic of Korea
| | - Hye Jin Yang
- Korean medicine (KM)-Application Center, Korea Institute of Oriental Medicine, Daegu 41062, Republic of Korea
| | - Youn-Hwan Hwang
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Wei Li
- Korean medicine (KM)-Application Center, Korea Institute of Oriental Medicine, Daegu 41062, Republic of Korea
| | - Younghoon Go
- Korean medicine (KM)-Application Center, Korea Institute of Oriental Medicine, Daegu 41062, Republic of Korea.
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Neuroprotective Effect of Chrysophanol as a PI3K/AKT/mTOR Signaling Inhibitor in an Experimental Model of Autologous Blood-induced Intracerebral Hemorrhage. Curr Med Sci 2022; 42:249-266. [PMID: 35079960 DOI: 10.1007/s11596-022-2496-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 06/29/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Intracerebral hemorrhage (ICH) refers to predominant, sporadic, and non-traumatic bleeding in the brain parenchyma. The PI3K/AKT/mTOR signaling pathway is an important signal transduction pathway regulated by enzyme-linked receptors and has many biological functions in mammals. It plays a key role in neuronal metabolism, gene expression regulation, and tissue homeostasis in the healthy and diseased brain. METHODS In the present study, the role of the PI3K/AKT/mTOR pathway inhibitor chrysophanol (CPH) (10 mg/kg and 20 mg/kg, orally) in the improvement of ICH-associated neurological defects in rats was investigated. Autologous blood (20 µL/5 min/unilateral/intracerebroventricular) mimics ICH-like defects involving cellular and molecular dysfunction and neurotransmitter imbalance. The current study also included various behavioral assessments to examine cognition, memory, and motor and neuromuscular coordination. The protein expression levels of PI3K, AKT, and mTOR as well as myelin basic protein and apoptotic markers, such as Bax, Bcl-2, and caspase-3, were examined using ELISA kits. Furthermore, the levels of various neuroinflammatory cytokines and oxidative stress markers were assessed. Additionally, the neurological severity score, brain water content, gross brain pathology, and hematoma size were used to indicate neurological function and brain edema. RESULTS CPH was found to be neuroprotective by restoring neurobehavioral alterations and significantly reducing the elevated PI3K, AKT, and mTOR protein levels, and modulating the apoptotic markers such as Bax, Bcl-2, and caspase-3 in rat brain homogenate. CPH substantially reduced the inflammatory cytokines like interleukin (IL)-1β, IL-6, and tumor necrosis factor-α. CPH administration restored the neurotransmitters GABA, glutamate, acetylcholine, dopamine, and various oxidative stress markers. CONCLUSION Our results show that CPH may be a promising therapeutic approach for overcoming neuronal damage caused by the overexpression of the PI3K/AKT/mTOR signaling pathway in ICH-induced neurological dysfunctions in rats.
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Jadaun KS, Mehan S, Sharma A, Siddiqui EM, Kumar S, Alsuhaymi N. Neuroprotective Effect of Chrysophanol as a PI3K/AKT/mTOR Signaling Inhibitor in an Experimental Model of Autologous Blood-induced Intracerebral Hemorrhage. Curr Med Sci 2022:10.1007/s11596-022-2522-7. [PMID: 35099677 DOI: 10.1007/s11596-022-2522-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 06/29/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Intracerebral hemorrhage (ICH) refers to predominant, sporadic, and non-traumatic bleeding in the brain parenchyma. The PI3K/AKT/mTOR signaling pathway is an important signal transduction pathway regulated by enzyme-linked receptors and has many biological functions in mammals. It plays a key role in neuronal metabolism, gene expression regulation, and tissue homeostasis in the healthy and diseased brain. METHODS In the present study, the role of the PI3K/AKT/mTOR pathway inhibitor chrysophanol (CPH) (10 mg/kg and 20 mg/kg, orally) in the improvement of ICH-associated neurological defects in rats was investigated. Autologous blood (20 µL/5 min/unilateral/intracerebroventricular) mimics ICH-like defects involving cellular and molecular dysfunction and neurotransmitter imbalance. The current study also included various behavioral assessments to examine cognition, memory, and motor and neuromuscular coordination. The protein expression levels of PI3K, AKT, and mTOR as well as myelin basic protein and apoptotic markers, such as Bax, Bcl-2, and caspase-3, were examined using ELISA kits. Furthermore, the levels of various neuroinflammatory cytokines and oxidative stress markers were assessed. Additionally, the neurological severity score, brain water content, gross brain pathology, and hematoma size were used to indicate neurological function and brain edema. RESULTS CPH was found to be neuroprotective by restoring neurobehavioral alterations and significantly reducing the elevated PI3K, AKT, and mTOR protein levels, and modulating the apoptotic markers such as Bax, Bcl-2, and caspase-3 in rat brain homogenate. CPH substantially reduced the inflammatory cytokines like interleukin (IL)-1β, IL-6, and tumor necrosis factor-α. CPH administration restored the neurotransmitters GABA, glutamate, acetylcholine, dopamine, and various oxidative stress markers. CONCLUSION Our results show that CPH may be a promising therapeutic approach for overcoming neuronal damage caused by the overexpression of the PI3K/AKT/mTOR signaling pathway in ICH-induced neurological dysfunctions in rats.
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Affiliation(s)
- Kuldeep Singh Jadaun
- Neuropharmacology Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Sidharth Mehan
- Neuropharmacology Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India.
| | - Aarti Sharma
- Neuropharmacology Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Ehraz Mehmood Siddiqui
- Neuropharmacology Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Sumit Kumar
- Neuropharmacology Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Naif Alsuhaymi
- Department of Emergency Medical Services, Faculty of Health Sciences - AlQunfudah, Umm Al-Qura University, Mekkah, Saudi Arabia
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Zhao P, Chen X, Han X, Wang Y, Shi Y, Ji J, Lei Y, Liu Y, Kong Q, Mu L, Wang J, Zhao W, Wang G, Liu X, Zhang T, Zhang Y, Sun B, Liu Y, Li H. Involvement of microRNA-155 in the mechanism of electroacupuncture treatment effects on experimental autoimmune encephalomyelitis. Int Immunopharmacol 2021; 97:107811. [PMID: 34091117 DOI: 10.1016/j.intimp.2021.107811] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 05/17/2021] [Accepted: 05/21/2021] [Indexed: 11/18/2022]
Abstract
Multiple sclerosis (MS) is a neurodegenerative and demyelinating autoimmune disease mediated by autoreactive T cells that affects the central nervous system (CNS). Electroacupuncture (EA) has emerged as an alternative or supplemental treatment for MS, but the mechanism by which EA may alleviate MS symptoms is unresolved. Here, we examined the effects of EA at the Zusanli (ST36) acupoint on mice with experimental autoimmune encephalomyelitis (EAE), the predominant animal model of MS. The effects of EA on EAE emergence, inflammatory cell levels, proinflammatory cytokines, and spinal cord pathology were examined. EA treatment attenuated the EAE clinical score and associated spinal cord demyelination, while reducing the presence of proinflammatory cytokines in mononuclear cells (MNCs), downregulating microRNA (miR)-155, and upregulating the opioid peptide precursor proopiomelanocortin (POMC) in the CNS. Experiments in which cultured neurons were transfected with a miR-155 mimic or a miR-155 inhibitor further showed that the direct modulation of miR-155 levels could regulate POMC levels in neurons. In conclusion, the alleviation of EAE by EA is characterized by reduced proportions of Th1/Th17 cells and increased proportions of Th2 cells, POMC upregulation, and miR-155 downregulation, while miR-155 itself can suppress POMC expression. These results, support the hypothesis that the effects of EA on EAE may involve the downregulation of miR-155.
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Affiliation(s)
- Ping Zhao
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Xin Chen
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Xudong Han
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Yanping Wang
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Yu Shi
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Jiayu Ji
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Yanting Lei
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Ying Liu
- Institute of Transfusion Medicine, Harbin Blood Center, Harbin, Heilongjiang 150081, China
| | - Qingfei Kong
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Lili Mu
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Jinghua Wang
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Wei Zhao
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Guangyou Wang
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Xijun Liu
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Tongshuai Zhang
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Yao Zhang
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Bo Sun
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China
| | - Yumei Liu
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China.
| | - Hulun Li
- Department of Neurobiology, Harbin Medical University, No. 194 Xuefu Road, Harbin, Heilongjiang 150081, China; The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry of Education, Harbin, Heilongjiang 150081, China.
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Urolithin A ameliorates experimental autoimmune encephalomyelitis by targeting aryl hydrocarbon receptor. EBioMedicine 2021; 64:103227. [PMID: 33530002 PMCID: PMC7851346 DOI: 10.1016/j.ebiom.2021.103227] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/07/2020] [Accepted: 01/14/2021] [Indexed: 01/05/2023] Open
Abstract
Background Urolithin A (URA) is an intestinal microbiota metabolic product from ellagitannin-containing foods with multiple biological activities. However, its role in autoimmune diseases is largely unknown. Here, for first time, we demonstrate the therapeutic effect of URA in an experimental autoimmune encephalomyelitis (EAE) animal model. Methods Therapeutic effect was evaluated via an active and passive EAE animal model in vivo. The function of URA on bone marrow-derived dendritic cells (BM-DCs), T cells, and microglia were tested in vitro. Findings Oral URA (25 mg/kg/d) suppressed disease progression at prevention, induction, and effector phases of preclinical EAE. Histological evaluation showed that significantly fewer inflammatory cells, decreased demyelination, lower numbers of M1-type microglia and activated DCs, as well as reduced infiltrating Th1/Th17 cells were present in the central nervous system (CNS) of the URA-treated group. URA treatment at 25 μM inhibited the activation of BM-DCs in vitro, restrained Th17 cell differentiation in T cell polarization conditions, and in a DC-CD4+ T cell co-culture system. Moreover, we confirmed URA inhibited pathogenicity of Th17 cells in adoptive EAE. Mechanism of URA action was directly targeting Aryl Hydrocarbon Receptor (AhR) and modulating the signaling pathways. Interpretation Collectively, our study offers new evidence that URA, as a human microbial metabolite, is valuable to use as a prospective therapeutic candidate for autoimmune diseases.
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Paricalcitol improves experimental autoimmune encephalomyelitis (EAE) by suppressing inflammation via NF-κB signaling. Biomed Pharmacother 2020; 125:109528. [PMID: 32106388 DOI: 10.1016/j.biopha.2019.109528] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/01/2019] [Accepted: 10/01/2019] [Indexed: 12/25/2022] Open
Abstract
Multiple sclerosis (MS) is known as an autoimmune disease in the central nervous system (CNS) characterized by motor deficits, pain, fatigue, cognitive impairment, and sensory and visual dysfunction. MS is considered to be resulted from significant inflammatory response. Paricalcitol (Pari) is a vitamin D2 analogue, which has been indicated to show anti-inflammatory activities in kidney and heart diseases. In the present study, if Pari could ameliorate the experimental autoimmune encephalomyelitis (EAE) was investigated. Here, the C57BL/6 mice were immunized using myelin oligodendrocyte glycoprotein 35-55 (MOG35-55). Subsequently, Pari was intraperitoneally injected into the mice. As for in vitro analysis, RAW264.7 and Jurkat cells were incubated with Pari together with corresponding stimulus. The results indicated that Pari administration reduced the paralytic severity, neuropathology and apoptosis in MOG-treated mice compared to the MOG single group. Pari also exhibited a significantly inhibitory effect on immune cell infiltration, glial cell activation, expression of pro-inflammatory factors and the activation of nuclear factor κB (NF-κB). The expression of pro-inflammatory regulators and the translocation of NF-κB from cytoplasm into nuclear in RAW264.7 and Jurkat cells under specific stimulation was clearly down-regulated by Pari incubation. Furthermore, we found that suppressing NF-κB with its inhibitor combined with Pari could further reduce the expression of pro-inflammatory factors and associated proteins. These data illustrated that Pari could diminish MOG-triggered EAE, as well as macrophages and T cells activation through blocking NF-κB activation. Collectively, Pari might have therapeutic effects in mouse models with MS.
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Silymarin Restores Regulatory T Cells (Tregs) Function in Multiple Sclerosis (MS) Patients In Vitro. Inflammation 2019; 42:1203-1214. [DOI: 10.1007/s10753-019-00980-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Rengasamy KR, Khan H, Gowrishankar S, Lagoa RJ, Mahomoodally FM, Khan Z, Suroowan S, Tewari D, Zengin G, Hassan ST, Pandian SK. The role of flavonoids in autoimmune diseases: Therapeutic updates. Pharmacol Ther 2019; 194:107-131. [DOI: 10.1016/j.pharmthera.2018.09.009] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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