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Wang D, Wang T, Yang H, Yang J, Shi Z. Spectroscopy and visible-light driven photocatalytic properties of a microcrystalline Cu-complex derived from a novel Gabapentin Schiff base. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123138. [PMID: 37453380 DOI: 10.1016/j.saa.2023.123138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/13/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
A novel Gabapentin derivative Schiff base Gasa was synthesized by condensing Gabapentin with salicylaldehyde, which was further coordinated with Cu2+ in methanol to give a microcrystalline Cu(II) complex Cu(Gasa)2. The synthesized Gasa and Cu(Gasa)2 were further characterized by single-crystal X-ray diffraction, scanning electron microscopy (SEM), as well as the FT-IR, Raman, electronic and fluorescence spectra. Cu(Gasa)2 exhibited excellent visible-light driven photocatalytic activities in removal of Congo red (CR) and Methylene blue (MB) dyes from aqueous solution in the presence of H2O2 as oxidant. It was revealed that ∙OH radicals played the most important role in the photodegradation processes of organic dyes, and the photodegradation of CR and MB fitted well with the pseudo-first-order kinetic model. In addition, solid state luminescent properties of Gasa and Cu(Gasa)2 were also studied in detail.
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Affiliation(s)
- Dawei Wang
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, PR China.
| | - Tao Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, PR China
| | - Haiyan Yang
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, PR China
| | - Jing Yang
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, PR China
| | - Zhengjun Shi
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, PR China.
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Wang XY, Liu WG, Hou AS, Song YX, Ma YL, Wu XD, Cao JB, Mi WD. Dysfunction of EAAT3 Aggravates LPS-Induced Post-Operative Cognitive Dysfunction. MEMBRANES 2022; 12:membranes12030317. [PMID: 35323793 PMCID: PMC8951453 DOI: 10.3390/membranes12030317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 11/23/2022]
Abstract
Numerous results have revealed an association between inhibited function of excitatory amino acid transporter 3 (EAAT3) and several neurodegenerative diseases. This was also corroborated by our previous studies which showed that the EAAT3 function was intimately linked to learning and memory. With this premise, we examined the role of EAAT3 in post-operative cognitive dysfunction (POCD) and explored the potential benefit of riluzole in countering POCD in the present study. We first established a recombinant adeno-associated-viral (rAAV)-mediated shRNA to knockdown SLC1A1/EAAT3 expression in the hippocampus of adult male mice. The mice then received an intracerebroventricular microinjection of 2 μg lipopolysaccharide (LPS) to construct the POCD model. In addition, for old male mice, 4 mg/kg of riluzole was intraperitoneally injected for three consecutive days, with the last injection administered 2 h before the LPS microinjection. Cognitive function was assessed using the Morris water maze 24 h following the LPS microinjection. Animal behavioral tests, as well as pathological and biochemical assays, were performed to clarify the role of EAAT3 function in POCD and evaluate the effect of activating the EAAT3 function by riluzole. In the present study, we established a mouse model with hippocampal SLC1A1/EAAT3 knockdown and found that hippocampal SLC1A1/EAAT3 knockdown aggravated LPS-induced learning and memory deficits in adult male mice. Meanwhile, LPS significantly inhibited the expression of EAAT3 membrane protein and the phosphorylation level of GluA1 protein in the hippocampus of adult male mice. Moreover, riluzole pretreatment significantly increased the expression of hippocampal EAAT3 membrane protein and also ameliorated LPS-induced cognitive impairment in elderly male mice. Taken together, our results demonstrated that the dysfunction of EAAT3 is an important risk factor for POCD susceptibility and therefore, it may become a promising target for POCD treatment.
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Affiliation(s)
- Xiao-Yan Wang
- Chinese PLA Medical School, Beijing 100853, China; (X.-Y.W.); (W.-G.L.)
- Department of Anesthesiology, The Fourth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
| | - Wen-Gang Liu
- Chinese PLA Medical School, Beijing 100853, China; (X.-Y.W.); (W.-G.L.)
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
| | - Ai-Sheng Hou
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
| | - Yu-Xiang Song
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
| | - Yu-Long Ma
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
| | - Xiao-Dong Wu
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
| | - Jiang-Bei Cao
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
- Correspondence: (J.-B.C.); (W.-D.M.)
| | - Wei-Dong Mi
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; (A.-S.H.); (Y.-X.S.); (Y.-L.M.); (X.-D.W.)
- Correspondence: (J.-B.C.); (W.-D.M.)
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Türk S, Tok F, Erdoğan Ö, Çevik Ö, Tok TT, Koçyiğit-Kaymakçıoğlu B, Karakuş S. Synthesis, anticancer evaluation and in silico ADMET studies on urea/thiourea derivatives from gabapentin. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2020.1845678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Sevda Türk
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Fatih Tok
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Istanbul, Turkey
| | - Ömer Erdoğan
- Department of Biochemistry, School of Medicine, Aydın Adnan Menderes University, Aydın, Turkey
| | - Özge Çevik
- Department of Biochemistry, School of Medicine, Aydın Adnan Menderes University, Aydın, Turkey
| | - Tuğba Taşkın Tok
- Department of Chemistry, Faculty of Sciences and Arts, Gaziantep University, Gaziantep, Turkey
| | | | - Sevgi Karakuş
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marmara University, Istanbul, Turkey
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Kroth A, Santos MDCQ, da Silva TCB, Silveira EMS, Trapp M, Bezzerra RMN, Simabuco F, Niero R, Partata WA. Aqueous extract from Luehea divaricata Mart. Leaves reduces nociception in rats with neuropathic pain. JOURNAL OF ETHNOPHARMACOLOGY 2020; 256:112761. [PMID: 32171894 DOI: 10.1016/j.jep.2020.112761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/04/2020] [Accepted: 03/08/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Luehea divaricata, popularly known in Brazil as "açoita-cavalo", has been widely explored by different ethnic groups native to Brazil to treat different pathologic conditions, including inflammatory pain. However, no report could be found on the effect that extract of L. divaricata has on neuropathic pain. This is an important topic because convergent and divergent mechanisms underlie inflammatory vs. neuropathic pain indicate that there may not always be a clear mechanistic delineation between these two conditions. AIM OF THE STUDY The study aimed to determine antioxidant activity and macronutrient composition of aqueous extract from leaves of L. divaricata, and the effect of oral administration on nociception in rats with chronic constriction injury (CCI) of sciatic nerve-induced neuropathic pain, one of the most commonly employed animal models of neuropathic pain. MATERIALS AND METHODS The antioxidant activity of the extract was evaluated by total phenolic content and DPPH, ABTS●+ and ORAC methods. Vitexin was determined by HPLC to show that the composition of the extract of the present study is similar to that used in previous studies with this genus. Total sugar and sucrose concentrations were assessed by the anthrone method, while glucose and triacilglycerides were determined using commercially available kits. Fructose concentration was calculated from values for total sugars, glucose and sucrose. Total protein was determined by Bradford assay. The effect on DNA strand breaking was investigated by inhibition of strand breaking of supercoiled DNA by hydroxyl radical. The antinociceptive effects of aqueous extract (100, 300, 500, and 1000 mg/kg, i.g.) were evaluated on thermal and mechanical thresholds for neuropathic pain induced by chronic constriction injury (CCI) of the sciatic nerve in rats. We also compared the antinociceptive effect of the extract (500 mg/kg, i.g.) with that induced by gabapentin (50 mg/kg, i.g.), a first-line clinical treatment for neuropathic pain. The effect of co-administration of extract (500 mg/kg, i.g.) and low-dose gabapentin (30 mg/kg, i.g.) was also assessed. In addition, the effect of the extract on body weight, and blood and hepatic parameters were investigated to reveal possible side effects of treatment. RESULTS The extract showed high content of total phenol; good reducing capacity for DPPH, ABTS●+ and ORAC assays; presence of vitexin; and a high capacity to inhibit strand breaking of supercoiled DNA. The predominant sugar was sucrose, followed by glucose and fructose. Total protein was greater than triacylglycerides, with the latter being present in a trace amount in the extract. The extract increased the thermal and mechanical thresholds, which was reduced by CCI. The antinociceptive effect was comparable to gabapentin and was also found after co-administration of extract and low-dose gabapentin. No significant change was found in body weight and blood and hepatic indicators after extract treatment. CONCLUSIONS Aqueous extract from L. divaricata leaves was as effective as gabapentin at attenuating CCI-induced neuropathic pain, indicating for first time the therapeutic potential of this species for this type of pain.
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Affiliation(s)
- Adarly Kroth
- Área Ciências da Vida e Saúde, Universidade do Oeste de Santa Catarina, Rua Getúlio Vargas, 2125, Bairro Flor da Serra, CEP 89600-000, Joaçaba, SC, Brazil
| | - Maria do Carmo Quevedo Santos
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, Bairro Farroupilha, CEP 90050-170, Porto Alegre, RS, Brazil
| | - Thaisla Cristiane Borella da Silva
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, Bairro Farroupilha, CEP 90050-170, Porto Alegre, RS, Brazil
| | - Elza Maria Santos Silveira
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, Bairro Farroupilha, CEP 90050-170, Porto Alegre, RS, Brazil
| | - Márcia Trapp
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, Bairro Farroupilha, CEP 90050-170, Porto Alegre, RS, Brazil
| | | | - Fernando Simabuco
- Faculdade de Ciências Aplicadas, Unicamp Campus 2, Rua Pedro Zaccaria, 1300, CEP 13484-350, Limeira, SP, Brazil
| | - Rivaldo Niero
- Escola de Ciências da Saúde, Programa de Pós-graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí, Campus Itajaí, Rua Uruguai, 458, Centro, CEP 88302-901, Itajaí, SC, Brazil
| | - Wania Aparecida Partata
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, Bairro Farroupilha, CEP 90050-170, Porto Alegre, RS, Brazil.
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Aminophylline and Ephedrine, but Not Flumazenil, Inhibit the Activity of the Excitatory Amino Acid Transporter 3 Expressed in Xenopus Oocytes and Reverse the Increased Activity by Propofol. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6817932. [PMID: 29888272 PMCID: PMC5985076 DOI: 10.1155/2018/6817932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 04/04/2018] [Accepted: 04/11/2018] [Indexed: 11/18/2022]
Abstract
We investigated the effects of flumazenil, aminophylline, and ephedrine on the excitatory amino acid transporter type 3 (EAAT3) activity and the interaction with propofol. EAAT3 was expressed in the Xenopus oocytes. L-Glutamate-induced membrane currents were measured using the two-electrode voltage clamp at various drug concentrations. Oocytes were preincubated with protein kinase C- (PKC-) activator, or inhibitor, and phosphatidylinositol 3-kinase (PI3K) inhibitor. To study the interaction with propofol, oocytes were exposed to propofol, propofol + aminophylline, or ephedrine. Aminophylline and ephedrine significantly decreased EAAT3 activity. Aminophylline (95 μM) and ephedrine (1.19 μM) significantly decreased Vmax, but not Km of EAAT3, for glutamate. The phorbol 12-myristate-13-acetate-induced increase in EAAT3 activity was abolished by aminophylline or ephedrine. The decreased EAAT3 activities by PKC inhibitors (staurosporine, chelerythrine) and PI3K inhibitor (wortmannin) were not significantly different from those by aminophylline or ephedrine, as well as those by PKC inhibitors or PI3K inhibitor + aminophylline or ephedrine. The enhanced EAAT3 activities induced by propofol were significantly abolished by aminophylline or ephedrine. Aminophylline and ephedrine inhibit EAAT3 activity via PKC and PI3K pathways and abolish the increased EAAT3 activity by propofol. Our results indicate a novel site of action for aminophylline and ephedrine.
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Chincholkar M. Analgesic mechanisms of gabapentinoids and effects in experimental pain models: a narrative review. Br J Anaesth 2018; 120:1315-1334. [DOI: 10.1016/j.bja.2018.02.066] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 02/07/2018] [Accepted: 03/14/2018] [Indexed: 12/17/2022] Open
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Drugs to Alter Extracellular Concentration of Glutamate: Modulators of Glutamate Uptake Systems. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/978-1-4939-7228-9_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Riffel APK, de Souza JA, Santos MDCQ, Horst A, Scheid T, Kolberg C, Belló-Klein A, Partata WA. Systemic administration of vitamins C and E attenuates nociception induced by chronic constriction injury of the sciatic nerve in rats. Brain Res Bull 2016; 121:169-77. [PMID: 26855326 DOI: 10.1016/j.brainresbull.2016.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/18/2016] [Accepted: 02/03/2016] [Indexed: 01/09/2023]
Abstract
Antioxidants have been tested to treat neuropathic pain, and α-Tocopherol (vitamin E--vit. E) and ascorbic acid (vitamin C--vit. C) are potent antioxidants. We assessed the effect of intraperitoneal administration of vit. C (30 mg/kg/day) and vit. E (15 mg/kg/day), given alone or in combination, on the mechanical and thermal thresholds and the sciatic functional index (SFI) in rats with chronic constriction injury (CCI) of the sciatic nerve. We also determined the lipid hydroperoxides and total antioxidant capacity (TAC) in the injured sciatic nerve. Further, we assessed the effects of oral administration of vit. C+vit. E (vit. C+E) and of a combination of vit. C+E and gabapentin (100mg/kg/day, i.p.) on the mechanical and thermal thresholds of CCI rats. The vitamins, whether administered orally or i.p., attenuated the reductions in the mechanical and thermal thresholds induced by CCI. The antinociceptive effect was greater with a combination of vit. C+E than with each vitamin given alone. The SFI was also improved in vitamin-treated CCI rats. Co-administration of vit. C+E and gabapentin induced a greater antinociceptive effect than gabapentin alone. No significant change occurred in TAC and lipid hydroperoxide levels, but TAC increased (45%) while lipid hydroperoxides decreased (38%) in the sciatic nerve from vit. C+E-treated CCI rats. Thus, treatment with a combination of vit. C+E was more effective to treat CCI-induced neuropathic pain than vitamins alone, and the antinociceptive effect was greater with co-administration of vit. C+E and gabapentin than with gabapentin alone.
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Affiliation(s)
- Ana Paula K Riffel
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - Jéssica A de Souza
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Maria do Carmo Q Santos
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Andréa Horst
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Taína Scheid
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Carolina Kolberg
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Adriane Belló-Klein
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Wania A Partata
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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