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Peixoto NC, Bernardi JS, Oliveira CS, Santos MSC, Marion SL, Silva RS, Rosa RM, Rodrigues OED, Pereira ME. Hippocampal acetylcholinesterase activation induced by streptozotocin in mice is protected by an organotellurium compound without evidence of toxicity. AN ACAD BRAS CIENC 2024; 96:e20221048. [PMID: 38597499 DOI: 10.1590/0001-3765202420221048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 12/19/2023] [Indexed: 04/11/2024] Open
Abstract
The cognitive deficit, which is like Alzheimer's disease and is associated with oxidative damage, may be induced by exposure to streptozotocin. This study aimed to evaluate if the tellurium-containing organocompound, 3j, 5'-arylchalcogeno-3-aminothymidine derivative, interferes with the effects of streptozotocin, as well as to investigate its toxicity in adult mice. Cognitive deficit was induced by two doses of streptozotocin (2.25 mg/kg/day, 48 h interval) intracerebroventricularly. After, the mice were subcutaneously treated with 3j (8.62 mg/kg/day) for 25 days. The effects were assessed by evaluating hippocampal and cortical acetylcholinesterase and behavioral tasks. 3j toxicity was investigated for 10 (0, 21.55, or 43.10 mg/kg/day) and 37 (0, 4.31, or 8.62 mg/kg/day) days by assessing biometric parameters and glucose and urea levels, and alanine aminotransferase activity in blood plasma. 3j exposure did not alter the behavioral alterations induced by streptozotocin exposure. On the other hand, 3j exposure normalized hippocampus acetylcholinesterase activity, which is enhanced by streptozotocin exposure. Toxicity evaluation showed that the administration of 3j for either 10 or 37 days did not cause harmful effects on the biometric and biochemical parameters analyzed. Therefore, 3j does not present any apparent toxicity and reverts acetylcholinesterase activity increase induced by streptozotocin in young adult mice.
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Affiliation(s)
- Nilce C Peixoto
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
- Departamento de Ciências da Saúde, Campus de Palmeira das Missões, Avenida Independência, 3751, Vista Alegre, 98300-000 Palmeira das Missões, RS, Brazil
| | - Jamile S Bernardi
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Cláudia S Oliveira
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Mariana Suelen C Santos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Sara L Marion
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Rafael S Silva
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Raquel M Rosa
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Oscar E D Rodrigues
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
- Departamento de Química, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Maria Ester Pereira
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Santa Maria, Centro de Ciências Naturais e Exatas, Campus Sede, Avenida Roraima, 1000, Cidade Universitária, Camobi, 97105-900 Santa Maria, RS, Brazil
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Leimann FV, de Souza LB, de Oliveira BPM, Rossi BF, da Silva PS, Shiraishi CSH, Kaplum V, Abreu RM, Pereira C, Barros L, Peron AP, Ineu RP, Oechsler BF, Sayer C, de Araújo PHH, Gonçalves OH. Evaluation of berberine nanoparticles as a strategy to modulate acetylcholinesterase activity. Food Res Int 2023; 173:113295. [PMID: 37803607 DOI: 10.1016/j.foodres.2023.113295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 10/08/2023]
Abstract
Researchers have concentrated efforts in the search for natural-based reversible inhibitors for cholinesterase enzymes as they may play a key role in the treatment of degenerative diseases. Diverse plant alkaloids can inhibit the action of acetylcholinesterase and, among them, berberine is a promising bioactive. However, berberine has poor water solubility and low bioavailability, which makes it difficult to use in treatment. The solid dispersion technique can improve the water affinity of hydrophobic substances, but berberine solid dispersions have not been extensively studied. Safety testing is also essential to ensure that the berberine-loaded solid dispersions are safe for use. This study investigated the effectiveness of berberine-loaded solid dispersions (SD) as inhibitors of acetylcholinesterase enzyme (AChE). Docking simulation was used to investigate the influence of berberine on AChE, and in vitro assays were conducted to confirm the enzymatic kinetics of AChE in the presence of berberine. Berberine SD also showed improved cytotoxic effects on tumoral cells when dispersed in aqueous media. In vivo assays using Allium cepa were implemented, and no cytotoxicity/genotoxicity was found for the berberine solid dispersion. These results suggest that berberine SD could be a significant step towards safe nanostructures for use in the treatment of neurodegenerative diseases.
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Affiliation(s)
- Fernanda Vitória Leimann
- Post-Graduation Program of Food Technology (PPGTA), Federal University of Technology - Paraná - UTFPR, Brazil; Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal.
| | - Luma Borges de Souza
- Post-Graduation Program of Food Technology (PPGTA), Federal University of Technology - Paraná - UTFPR, Brazil
| | | | - Bruna Franzon Rossi
- Food and Chemical Engineering Academic Department (DAAEQ), Federal University of Technology - Paraná - UTFPR, Brazil
| | | | - Carlos Seiti Hurtado Shiraishi
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal; Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Vanessa Kaplum
- Post-Graduation Program of Food Technology (PPGTA), Federal University of Technology - Paraná - UTFPR, Brazil
| | - Rui Miguel Abreu
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal; Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Carla Pereira
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal; Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Lillian Barros
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal; Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Ana Paula Peron
- Biodiversity and Nature Conservation Department, Federal University of Technology - Paraná - UTFPR, Brazil
| | - Rafael Porto Ineu
- Department of Technology and Food Science, Federal University of Santa Maria - UFSM, Brazil
| | - Bruno Francisco Oechsler
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Brazil
| | - Claudia Sayer
- Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Brazil
| | | | - Odinei Hess Gonçalves
- Post-Graduation Program of Food Technology (PPGTA), Federal University of Technology - Paraná - UTFPR, Brazil; Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal.
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Sher N, Ahmed M, Mushtaq N. Synthesis, optimization, and characterization of silver/gold allied bimetallic from
Hippeastrum hybridum
(L.) and their ex vivo anti‐acetylcholinesterase activity in rat brain. Appl Organomet Chem 2023. [DOI: 10.1002/aoc.7082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Silva SSL, Tureck LV, Souza LC, Mello-Hortega JV, Piumbini AL, Teixeira MD, Furtado-Alle L, Vital MABF, Souza RLR. Animal model of Alzheimer's disease induced by streptozotocin: New insights about cholinergic pathway. Brain Res 2023; 1799:148175. [PMID: 36436686 DOI: 10.1016/j.brainres.2022.148175] [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: 06/05/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
Alzheimer's disease (AD) is of multifactorial origin, and still presents several gaps regarding its development and progression. Disorders of the cholinergic system are well known to be involved in the pathogenesis of AD, characterized by increased acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) and decreased acetyltransferase (ChAT) enzymatic activities. Late onset AD (LOAD) animal model induced by intracerebroventricular injection of streptozotocin (icv-STZ) showed promising results in this context, due to the similarity with the pathophysiology of human LOAD. Thus, this study aimed to assess the long-term effects of icv-STZ on the cholinergic system, through the measuring of AChE and BChE enzymatic activities in hippocampus, prefrontal cortex and liver of animals euthanized 30 and 120-days after the icv-STZ. Regarding the cholinergic response to icv-STZ, the 30-days and 120-days STZ-induced rats exhibit decreased AChE and BChE activities only in the hippocampus. The cognitive deficit was more consistent in the 30-days post icv-STZ animals, as was the weight loss. This is the first study to investigate the long-term effects (more than 60 days) of the icv-STZ on AChE and BChE activities, and our results, as well as those of a recent study, suggest that the cholinergic system may not be compromised by icv-STZ, at least in the long term, which means that this model may not be the best model for studying the cholinergic system in AD or that it is informative only for a short period.
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Affiliation(s)
- Saritha S L Silva
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Luciane V Tureck
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Leonardo C Souza
- Department of Pharmacology, Federal University of Paraná, Curitiba, Brazil
| | | | | | - Mayza D Teixeira
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Lupe Furtado-Alle
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Maria A B F Vital
- Department of Pharmacology, Federal University of Paraná, Curitiba, Brazil
| | - Ricardo L R Souza
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil.
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5
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Grella Miranda C, dos Santos PDF, do Prado Silva JT, Vitória Leimann F, Ferreira Borges B, Miguel Abreu R, Porto Ineu R, Hess Gonçalves O. Influence of nanoencapsulated lutein on acetylcholinesterase activity: In vitro determination, kinetic parameters, and in silico docking simulations. Food Chem 2020; 307:125523. [DOI: 10.1016/j.foodchem.2019.125523] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 01/03/2023]
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de Souza MM, Andreolla MC, Ribeiro TC, Gonçalves AE, Medeiros AR, de Souza AS, Ferreira LLG, Andricopulo AD, Yunes RA, de Oliveira AS. Structure-activity relationships of sulfonamides derived from carvacrol and their potential for the treatment of Alzheimer's disease. RSC Med Chem 2020; 11:307-316. [PMID: 33479638 PMCID: PMC7429979 DOI: 10.1039/d0md00009d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 01/29/2020] [Indexed: 12/25/2022] Open
Abstract
Five synthetic sulfonamides derived from carvacrol, a natural product and a small molecule with druglike properties, were evaluated with respect to their effects on the cognitive deficits of animals with streptozotocin (STZ)-induced Alzheimer's disease (AD). Memory, ambulation, anxiety and oxidative stress were evaluated. In vitro assays were performed to assess the inhibition of acetylcholinesterase (AChE), and the data were combined with molecular docking for the establishment of structure-activity relationships. The memories of animals treated with the compounds derived from morpholine (1), hydrazine (3) and 2-phenol (5) were improved. Compound 3 was the most promising, yielding excellent results in the inhibitory avoidance test. Moreover, the compounds did not exhibit any deleterious effects on the animals' ambulation in the open field test. Molecular docking confirmed the results obtained in the AChE inhibition assay. In short, compounds 1, 3 and 5 can reduce STZ-induced deficits and show potential for the treatment of Alzheimer's. In addition, these agents produce significant anxiolytic and antioxidant effects.
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Affiliation(s)
- Márcia Maria de Souza
- School of Health Sciences/Graduate Program in Pharmaceutical Sciences , UNIVALI , Rua Uruguai, 458 F6 lab 206 Campus I, centro , Itajai , SC 88302-202 , Brazil
| | - Marina Corrêa Andreolla
- School of Health Sciences/Graduate Program in Pharmaceutical Sciences , UNIVALI , Rua Uruguai, 458 F6 lab 206 Campus I, centro , Itajai , SC 88302-202 , Brazil
| | - Thaís Cecília Ribeiro
- School of Health Sciences/Graduate Program in Pharmaceutical Sciences , UNIVALI , Rua Uruguai, 458 F6 lab 206 Campus I, centro , Itajai , SC 88302-202 , Brazil
| | - Ana Elisa Gonçalves
- School of Health Sciences/Graduate Program in Pharmaceutical Sciences , UNIVALI , Rua Uruguai, 458 F6 lab 206 Campus I, centro , Itajai , SC 88302-202 , Brazil
| | - Alex Rogério Medeiros
- Laboratory of Medicinal and Computational Chemistry , Center for Research and Innovation in Biodiversity and Drug Discovery , Institute of Physics of São Carlos , University of Sao Paulo , Av. João Dagnone, 1100 - Santa Angelina , São Carlos , SP 13563-120 , Brazil
| | - Anacleto Silva de Souza
- Laboratory of Medicinal and Computational Chemistry , Center for Research and Innovation in Biodiversity and Drug Discovery , Institute of Physics of São Carlos , University of Sao Paulo , Av. João Dagnone, 1100 - Santa Angelina , São Carlos , SP 13563-120 , Brazil
| | - Leonardo Luiz Gomes Ferreira
- Laboratory of Medicinal and Computational Chemistry , Center for Research and Innovation in Biodiversity and Drug Discovery , Institute of Physics of São Carlos , University of Sao Paulo , Av. João Dagnone, 1100 - Santa Angelina , São Carlos , SP 13563-120 , Brazil
| | - Adriano Defini Andricopulo
- Laboratory of Medicinal and Computational Chemistry , Center for Research and Innovation in Biodiversity and Drug Discovery , Institute of Physics of São Carlos , University of Sao Paulo , Av. João Dagnone, 1100 - Santa Angelina , São Carlos , SP 13563-120 , Brazil
| | - Rosendo Augusto Yunes
- Department of Chemistry , Federal University of Santa Catarina , R. Eng. Agronômico Andrei Cristian Ferreira, s/n - Trindade , Florianópolis , SC 88040-900 , Brazil
| | - Aldo Sena de Oliveira
- Laboratory of Medicinal and Computational Chemistry , Center for Research and Innovation in Biodiversity and Drug Discovery , Institute of Physics of São Carlos , University of Sao Paulo , Av. João Dagnone, 1100 - Santa Angelina , São Carlos , SP 13563-120 , Brazil
- Department of Exact Sciences and Education , Federal University of Santa Catarina- Campus of Blumenau , Rua João Pessoa, 2750 - Velha , Blumenau , SC 89036-256 , Brazil .
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Thomé GR, Oliveira VA, Chitolina Schetinger MR, Saraiva RA, Souza D, Dorneles Rodrigues OE, Teixeira Rocha JB, Ineu RP, Pereira ME. Selenothymidine protects against biochemical and behavioral alterations induced by ICV-STZ model of dementia in mice. Chem Biol Interact 2018; 294:135-143. [PMID: 30120923 DOI: 10.1016/j.cbi.2018.08.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 07/10/2018] [Accepted: 08/10/2018] [Indexed: 11/29/2022]
Abstract
The present study evaluated the neuroprotective effects of one selenium-containing AZT derivative compound (S1073) in memory and learning impairment caused by Intracerebroventricular-streptozotocin (ICV-STZ). ICV-STZ in mice causes impairment of energy metabolism with oxidative damage and cholinergic dysfunction, and provides a relevant model for sporadic dementia of Alzheimer's type (AD). Acetylcolinesterase (AChE), Catalase (CAT), dichlorofluorescein oxidation (DCFH), TBARS and thiol content were measured. Swiss adult mice were pre-treated with S1073 [1 mmol/kg] (i.p.) and after 30 min of the injection received a bilateral dose of STZ [11.3 μmol/l]. After 8 days' STZ injection, we performed the behavioral experiments (Beaker test, Open field and Morris water maze task). ICV-STZ caused significant learning and memory impairments, which were significantly improved by S1073 pre-treatment. A significant increase in cerebral DFCH, TBARS levels and AChE activity and a disturbance in the memory and learning were observed in ICV-STZ injected animals. S1073 significantly ameliorated all alterations induced by ICV-STZ in mice. All these findings support the neuroprotective role of S1073 in mice model of Alzheimer's dementia-type induced by ICV-STZ, which may be associated with its antioxidant activity and/or with its inhibitory effect in brain AChE. In fact, in silico analysis indicated that S1073 may be an inhibitor of AChE.
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Affiliation(s)
- Gustavo Roberto Thomé
- Federal Technology University of Paraná, Post-Graduation Program of Chemical and Biochemical Processes, Brazil.
| | | | - Maria Rosa Chitolina Schetinger
- Federal University of Santa Maria, Post-Graduation Program of Biological Sciences: Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Brazil
| | | | - Diego Souza
- Federal University of Santa Maria, Post-Graduation Program of Biological Sciences: Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Brazil
| | - Oscar Endrigo Dorneles Rodrigues
- Federal University of Santa Maria, Post-Graduation Program of Biological Sciences: Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Brazil
| | - João Batista Teixeira Rocha
- Federal University of Santa Maria, Post-Graduation Program of Biological Sciences: Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Brazil
| | - Rafael Porto Ineu
- Federal Technology University of Paraná, Post-Graduation Program of Food Technology, Brazil
| | - Maria Ester Pereira
- Federal University of Santa Maria, Post-Graduation Program of Biological Sciences: Toxicological Biochemistry, Department of Biochemistry and Molecular Biology, Brazil
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Berté TE, Dalmagro AP, Zimath PL, Gonçalves AE, Meyre-Silva C, Bürger C, Weber CJ, Dos Santos DA, Cechinel-Filho V, de Souza MM. Taraxerol as a possible therapeutic agent on memory impairments and Alzheimer's disease: Effects against scopolamine and streptozotocin-induced cognitive dysfunctions. Steroids 2018; 132:5-11. [PMID: 29355563 DOI: 10.1016/j.steroids.2018.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 12/19/2017] [Accepted: 01/11/2018] [Indexed: 01/23/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder associated with cognitive impairment and cholinergic neuronal death, characteristic of the effect of time on biochemical neuronal function. The use of medicinal plants as an alternative form of prevention, or even as a possible treatment of AD, is therefore interesting areas of research, since the standard drugs have many side effects. Taraxerol (TRX) is a triterpene that has been isolated from several plant species, and its various pharmacological properties have already been identified, such the acetylcholinesterase (AChE) inhibition activity in vitro. There is a lack of information in literature that confirms the effect of TRX in an animal AD-like model. Seeking to fill this gap in the literature, in the present work we assessed the effect of TRX on AChE activity in the animals' encephalon and hippocampus. We also investigated the effect of TRX (1.77 µM/side, 0.5 μL) isolated from leaves of Eugenia umbelliflora Berg. on aversive memory impairments induced by scopolamine (2 µg/side, 0.5 µL) infused into rat hippocampus, and the effect of TRX (0.89 and 1.77 µM/side, 0.5 μL) on aversive memory impairments induced by streptozotocin (STZ) (2.5 mg/mL, 2.0 µL) infused i.c.v. into mice, using the step-down inhibitory avoidance task. We found that TRX significantly inhibited AChE activity in the animal's hippocampus. Furthermore, TRX significantly improved scopolamine and STZ-induced memory impairment. Taking together, these results confirms its AChE activity inhibition in animals and indicate that TRX has anti-amnesic activity that may hold significant therapeutic value in alleviating certain memory impairments observed in AD.
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Affiliation(s)
- Talita Elisa Berté
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Ana Paula Dalmagro
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil.
| | - Priscila Laiz Zimath
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Ana Elisa Gonçalves
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Christiane Meyre-Silva
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Cristiani Bürger
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Carla J Weber
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Diogo Adolfo Dos Santos
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Valdir Cechinel-Filho
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
| | - Márcia M de Souza
- Centro de Ciências da Saúde, CCS - Núcleo de Investigações Químico Farmacêuticas NIQFAR/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas/UNIVALI, Rua Uruguai 458, Centro, CEP: 88302-202 Itajaí, SC, Brazil
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Pedroso TF, Oliveira CS, Fonseca MM, Oliveira VA, Pereira ME. Effects of Zinc and N-Acetylcysteine in Damage Caused by Lead Exposure in Young Rats. Biol Trace Elem Res 2017; 180:275-284. [PMID: 28389902 DOI: 10.1007/s12011-017-1009-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 03/31/2017] [Indexed: 12/22/2022]
Abstract
This study investigated the toxicity of rats exposed to lead acetate (AcPb) during the second phase of brain development (8-12 days postnatal) in hematological and cerebral parameters. Moreover, the preventive effect of zinc chloride (ZnCl2) and N-acetylcysteine (NAC) was investigated. Pups were injected subcutaneously with saline (0.9% NaCl solution), ZnCl2 (27 mg/kg/day), NAC (5 mg/kg/day) or ZnCl2 plus NAC for 5 days (3rd-7th postnatal days), and with saline (0.9% NaCl solution) or AcPb (7 mg/kg/day) in the five subsequent days (8th-12th postnatal days). Animals were sacrificed 21 days after the last AcPb exposure. Pups exposed to AcPb presented inhibition of blood porphobilinogen-synthase (PBG-synthase) activity without changes in hemoglobin content. ZnCl2 pre-exposure partially prevented PBG-synthase inhibition. Regarding neurotoxicity biomarkers, animals exposed to AcPb presented a decrease in cerebrum acetylcholinesterase (AChE) activity and an increase in Pb accumulation in blood and cerebrum. These changes were prevented by pre-treatment with ZnCl2, NAC, and ZnCl2 plus NAC. AcPb exposure caused no alteration in behavioral tasks. In short, results show that AcPb inhibited the activity of two important enzymatic biomarkers up to 21 days after the end of the exposure. Moreover, ZnCl2 and NAC prevented the alterations induced by AcPb.
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Affiliation(s)
- Taíse F Pedroso
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Cláudia S Oliveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Mariana M Fonseca
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Vitor A Oliveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Maria Ester Pereira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
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Anti-nociceptive effect of stigmasterol in mouse models of acute and chronic pain. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:1163-1172. [DOI: 10.1007/s00210-017-1416-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 08/04/2017] [Indexed: 10/24/2022]
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11
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Moraes-Silva L, Siqueira LF, Oliveira VA, Oliveira CS, Ineu RP, Pedroso TF, Fonseca MM, Pereira ME. Preventive Effect of CuCl2on Behavioral Alterations and Mercury Accumulation in Central Nervous System Induced by HgCl2in Newborn Rats. J Biochem Mol Toxicol 2014; 28:328-35. [DOI: 10.1002/jbt.21569] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/31/2014] [Accepted: 04/07/2014] [Indexed: 12/26/2022]
Affiliation(s)
- L. Moraes-Silva
- Programa de Pós-Graduação em Bioquímica Toxicológica, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - L. F. Siqueira
- Departamento de Bioquímica e Biologia Molecular, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - V. A. Oliveira
- Programa de Pós-Graduação em Bioquímica Toxicológica, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - C. S. Oliveira
- Programa de Pós-Graduação em Bioquímica Toxicológica, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - R. P. Ineu
- Programa de Pós-Graduação em Bioquímica Toxicológica, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - T. F. Pedroso
- Departamento de Bioquímica e Biologia Molecular, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - M. M. Fonseca
- Departamento de Bioquímica e Biologia Molecular, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
| | - M. E. Pereira
- Programa de Pós-Graduação em Bioquímica Toxicológica, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
- Departamento de Bioquímica e Biologia Molecular, CCNE; Universidade Federal de Santa Maria; Santa Maria 97105-900 RS Brazil
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12
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Liu YW, Shi DH, Chen AJ, Zhu Q, Xu JT, Zhang XX. Acetylcholinesterase inhibition effects of marine fungi. PHARMACEUTICAL BIOLOGY 2014; 52:539-543. [PMID: 24236532 DOI: 10.3109/13880209.2013.850516] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 09/24/2013] [Indexed: 06/02/2023]
Abstract
CONTEXT To this day, there are no reports that marine compounds isolated from microorganisms of the Lianyungang area of China have been used for the treatment of Alzheimer's disease. OBJECTIVE The present study was to isolate fungi from the sea sediment of the Lianyungang area and screen for acetylcholineseterase inhibition activities of ethyl acetate extracts. MATERIALS AND METHODS Fungi were isolated from the sea sediment and fermented. After centrifugation, the supernate was extracted with ethyl acetate. The ethyl acetate extract was then fractionated into five fractions. Acetylcholinesterase inhibition activities of the ethyl acetate extracts and five sub-fractions were tested at a concentration of 500 μg/mL with the Ellman's method. RESULTS Forty-three marine fungi were isolated; 15 extracts inhibited acetylcholinestrease >50% and 3 extracts inhibited the acetylcholinesterase >80% at the concentration of 500 μg/mL. The 3 extracts (L1705, S1101, SH0701) inhibited AChE dose-dependently with IC₅₀ values of 11.3 ± 1.2, 72.1 ± 2.3, and 7.8 ± 2.8 μg/mL, respectively. After the extract of SH0701 was fractionated into five fractions, the ethyl acetate fraction possessed the highest acetylcholinesterase inhibitory activity with an inhibition rate of 71.55% at the concentration of 10 μg/mL. The fungus SH0701 was identified as Aspergillus ochraceus SH0701 according to morphology and molecular identification. DISCUSSION AND CONCLUSION The present results indicates that some ethyl acetate extracts of marine fungi isolated from Lianyungang area of China could inhibit AChE potently. Therefore, some novel AChE inhibitors might exist in those extracts.
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Affiliation(s)
- Yu-Wei Liu
- School of Marine Science and Technology, Huaihai Institute of Technology , Lianyungang , P.R. China
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13
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Walker CIB, Trevisan G, Rossato MF, Silva CR, Pinheiro FV, Franciscato C, Tatsch E, Moretto MB, Silva MD, Manfron MP, Noal Moresco R, Santos ARS, Pereira ME, Ferreira J. Antinociceptive effect of Mirabilis jalapa on acute and chronic pain models in mice. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:685-693. [PMID: 23906783 DOI: 10.1016/j.jep.2013.07.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 07/11/2013] [Accepted: 07/22/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The infusion or decoction of Mirabilis jalapa leaves is used in traditional medicine in Brazil to treat inflammatory and painful diseases. Thus, the present study was designed to investigate whether the leaf ethyl acetate (Eta) fraction from Mirabilis jalapa exhibits antinociceptive effect in clinically relevant pain models in mice. Furthermore, we have investigated the role of cholinergic system in the antinociceptive action produced by Eta in mice. MATERIALS AND METHODS The effect of Eta administered orally (10mg/kg, p.o.) in mice was verified on the painful hypersensitivity (mechanical allodynia) in models of chronic inflammation (subcutaneous injection of complete Freund's Adjuvant-CFA in the plantar surface of the right hind paw), postoperative (paw surgical incision) and neuropathic (partial sciatic nerve ligation) pain. In the chronic inflammation model, we further verified the effect of Eta treatment on paw edema and interleukin-1β (IL-1β) levels. We also investigated the role of muscarinic and nicotinic receptors in the antiallodynic action produced by Eta as well as the possible action of Eta on in vitro and ex vivo acetylcholinesterase activity in CFA treated animals. Furthermore, we verified the effect of Eta treatment on the parameters of liver and kidney lesion (level of urea, and activity of aspartate aminotransferase and alanine aminotransferase). RESULTS Eta produced marked reduction in the allodynia caused by CFA, surgical incision and partial sciatic nerve ligation. However, Eta did not alter the paw edema or the increase of IL-1β levels produced by CFA. The antinociceptive effect of Eta was reversed by the pre-treatment of animals with the antagonists of muscarinic (atropine, 5mg/kg, s.c) or nicotinic (mecamylamine, 0.001mg/kg, s.c.) receptors. Eta did not alter in vitro acetylcholinesterase activity in blood or spinal cord samples, but it reversed the increase in the acetylcholinesterase activity observed in the spinal cord samples from mice injected with CFA. Moreover, Eta did not alter the indicators of liver or kidney lesion. CONCLUSIONS Based on its use in traditional medicine, the results of the present study confirmed the antinociceptive properties of Eta in clinically relevant pain models. Also its effect on the CFA-induced chronic inflammation seems to be related to acetylcholinesterase inhibition and cholinergic system.
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Affiliation(s)
- Cristiani I B Walker
- Departamento de Saúde, Curso de Farmácia, Universidade Federal de Sergipe, SE, Brazil; Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
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14
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Wolkmer P, Lopes STDA, Franciscato C, Silva ASD, Traesel CK, Siqueira LC, Pereira ME, Monteiro SG, Mazzanti CMDA. Trypanosoma evansi: Cholinesterase activity in acutely infected Wistar rats. Exp Parasitol 2010; 125:251-5. [DOI: 10.1016/j.exppara.2010.01.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Revised: 01/26/2010] [Accepted: 01/27/2010] [Indexed: 11/30/2022]
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15
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Franciscato C, Goulart F, Lovatto N, Duarte F, Flores E, Dressler V, Peixoto N, Pereira M. ZnCl
2
exposure protects against behavioral and acetylcholinesterase changes induced by HgCl
2. Int J Dev Neurosci 2009; 27:459-68. [DOI: 10.1016/j.ijdevneu.2009.05.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Revised: 04/09/2009] [Accepted: 05/05/2009] [Indexed: 10/20/2022] Open
Affiliation(s)
- C. Franciscato
- Programa de Pós‐Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - F.R. Goulart
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - N.M. Lovatto
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - F.A. Duarte
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - E.M.M. Flores
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - V.L. Dressler
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - N.C. Peixoto
- Programa de Pós‐Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
| | - M.E. Pereira
- Programa de Pós‐Graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
- Departamento de QuímicaCentro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria97.105‐900Santa MariaRSBrazil
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16
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Jósê AS, Franciscato C, Sônego F, Figueiró M, Thiesen FV, Garcia SC, Pereira ME. Sensitivity of young rats to nicotine exposure: Physiological and biochemical parameters. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2009; 72:242-247. [PMID: 18462794 DOI: 10.1016/j.ecoenv.2008.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 03/10/2008] [Accepted: 03/23/2008] [Indexed: 05/26/2023]
Abstract
This work has investigated the effects of prolonged exposure of young rats to nicotine on some physiological and biochemical parameters. Wistar male rats (30 days old) were treated (s.c.) with saline or nicotine 5mg/kg/day for 28 or 56 days. They received five injections (1mg/kg) per day (8, 10, 12:00 a.m., 2 and 4:00 p.m.) on the dark period of the cycle. Nicotine exposure for 56 days reduced body and liver weights. Moreover, nicotine exposure for 28 or 56 days decreased the hepatic glycogen but not blood glucose levels. The activities of blood and hepatic PBG-synthase, and blood and cerebral acetylcholinesterase were not affected by in vivo exposure. However, these activities were inhibited by nicotine in vitro. Results show that although high levels of plasma cotinine were found in both intervals of exposures, the parameters here analyzed were not affected by prolonged nicotine exposure except the storage of glucose, and body and liver weights.
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Affiliation(s)
- A S Jósê
- Programa de Pós-Graduação em Bioquímica Toxicológica, Brazil
| | - C Franciscato
- Programa de Pós-Graduação em Bioquímica Toxicológica, Brazil
| | - F Sônego
- Departamento de Química, CCNE, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - M Figueiró
- Programa de Pós-Graduação em Bioquímica Toxicológica, Brazil
| | - F V Thiesen
- Faculdade de Farmácia, Pontifícia Universidade Católica do Rio Grande do Sul, 90619-900 Porto Alegre, RS, Brazil
| | - S C Garcia
- Departamento de Análises Clínicas e Toxicológicas, CSS, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - M E Pereira
- Programa de Pós-Graduação em Bioquímica Toxicológica, Brazil; Departamento de Química, CCNE, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
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17
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Walker CIB, Trevisan G, Rossato MF, Franciscato C, Pereira ME, Ferreira J, Manfron MP. Antinociceptive activity of Mirabilis jalapa in mice. JOURNAL OF ETHNOPHARMACOLOGY 2008; 120:169-175. [PMID: 18761072 DOI: 10.1016/j.jep.2008.08.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Revised: 07/29/2008] [Accepted: 08/02/2008] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The infusion or decoction of Mirabilis jalapa leaves is used in traditional medicine in Brazil to treat inflammatory and painful diseases. AIM OF THE STUDY The present study examined the antinociceptive effect of Mirabilis jalapa extracts from leaves and stems in models of pain in mice. MATERIALS, METHODS AND RESULTS The crude hydroethanolic extract from leaves (CrdL) was more potent than the crude extract from stems (CrdS) to inhibit abdominal constrictions induced by acetic acid, with ID(50) values of 5.5 (2.3-13.1) and 18.0 (11.3-28.5) mg/kg, respectively. Among the fractions tested, the Eta fraction from leaves (Eta) was more effective (maximal inhibition of 83+/-8%) and potent (ID(50) of 1.1 (0.6-2.1) mg/kg) to induce antinociception. Eta and CrdL also possessed an antinociceptive effect in the tail-flick test. Pre-treatment with naloxone did not modify the antinociceptive effect of Eta, but co-administration with atropine completely prevented it. This suggests that the antinociceptive effect might depend on the cholinergic system. Instead, Eta was not able to alter the acetylcholinesterase activity in blood or spinal cord. Concerning side effects, Eta did not alter locomotor activity, body temperature, gastrointestinal transit and did not produce gastric lesions. CONCLUSION Our results demonstrate that Mirabilis jalapa presents antinociceptive activity in mice, which supports its folkloric use as an analgesic.
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Affiliation(s)
- Cristiani I B Walker
- Laboratório de Neurotoxicidade e Psicofarmacologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
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Stasiuk M, Bartosiewicz D, Kozubek A. Inhibitory effect of some natural and semisynthetic phenolic lipids upon acetylcholinesterase activity. Food Chem 2007; 108:996-1001. [PMID: 26065763 DOI: 10.1016/j.foodchem.2007.12.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 11/05/2007] [Accepted: 12/04/2007] [Indexed: 10/22/2022]
Abstract
The effect of phenolic lipids isolated from rye grains and cashew nut shell liquid (CNSL) from Anacardium occidentale and their semisynthetic derivatives on erythrocyte ghost's acetylcholinesterase activity was studied. It has been shown that all tested compounds decreased the enzymatic activity of acetylcholinesterase. This effect depends on the type of studied compounds. Three of them completely inhibit acetylcholinesterase activity at the micromolar concentration.
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Affiliation(s)
- Maria Stasiuk
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Dominika Bartosiewicz
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland
| | - Arkadiusz Kozubek
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland
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Bukowska B, Michałowicz J, Duda W. Alterations in human red blood cell properties induced by 3-(dimethylamino)phenol (in vitro). Toxicol In Vitro 2007; 21:1574-80. [PMID: 17629448 DOI: 10.1016/j.tiv.2007.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Revised: 05/09/2007] [Accepted: 05/29/2007] [Indexed: 11/27/2022]
Abstract
3-(Dimethylamino)phenol (3-DMAP) exists in the environment as a transformation product of ureic herbicides and may also be considered as a derivative of phenoxyherbicides. In this study, the activity of glutathione peroxidase, catalase and superoxide dismutase, as well as the level of free radicals and changes in cell morphology were measured in human erythrocytes exposed (in vitro) to 3-(dimethylamino)phenol. Human erythrocytes were incubated for 1 h in 3-DMAP at concentrations of 10-500 microg per 1 ml erythrocytes of 5% haematocrit. The results show that 3-(dimethylamino)phenol increased the level of free radicals and changed the activity of glutathione peroxidase, catalase, superoxide dismutase and acetylcholinesterase. It also changed cell morphology. All these results corroborated the thesis that 3-DMAP induces oxidative stress in cells. 3-DMAP changed the properties of the cell membrane, caused strong oxidation of haemoglobin, inhibited the levels of enzymatic and non-enzymatic antioxidants, which, in result, lead to generation of free radicals (ROS and semiquinones) that occurred in the exposed cells, predisposing them to oxidative damage.
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Affiliation(s)
- Bozena Bukowska
- Department of Biophysics of Environmental Pollution, University of Łódź, Banacha Str. 12/16, 90-237 Łódz, Poland.
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Obregon ADC, Schetinger MRC, Correa MM, Morsch VM, da Silva JEP, Martins MAP, Bonacorso HG, Zanatta N. Effects per se of Organic Solvents in the Cerebral Acetylcholinesterase of Rats. Neurochem Res 2005; 30:379-84. [PMID: 16018582 DOI: 10.1007/s11064-005-2612-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Acetylcholinesterase (AChE) was studied in different rat brain regions (cerebellum, hypothalamus, striatum, hippocampus and cortex) in the presence of different organic solvents normally used in the in vitro assay. The organic solvents used were acetone (C3H6O), acetonitrile (C2H3N), ethyl alcohol (C2H6O), isopropyl alcohol (C3H8O), methyl alcohol (CH4O), tert-butyl alcohol (C4H10O) and dimethyl sulfoxide (DMSO, C2H6OS) ranging from 0.6 to 10%. Ethyl and methyl alcohol presented no effect on AChE activity at any of the concentrations and brain structures tested. In the hippocampus, isopropyl alcohol did not demonstrate a significant inhibitory effect, even at high concentrations. Tert-butyl alcohol presented an interesting result, increased AChE activity (P < .05) in the hypothalamus (1.8%), cortex (1.8 and 2.5) and striatum (1.2, 1.8 and 2.5%) and decreased activity at a concentration of 10% in the cortex (P < .05) and striatum (P < .01). Acetone and acetonitrile presented similar results, both significantly inhibiting AChE in all structures (5%, P < .05 and 10%, P < .01). DMSO exhibited a highly inhibitory effect at practically all concentrations tested (P < .01). In conclusion, for testing new compounds on AChE activity in vitro, methyl and ethyl alcohol may be the best organic solvent choice.
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Affiliation(s)
- Adriana D C Obregon
- Depto de Quimica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
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