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Kenger İH, Yıldız H, Hüsunet MT, DÖNbak L, Kayraldız A. Elucidation of the cytogenotoxic potential of vigabatrin and its in silico computer-assisted DNA interaction. Drug Chem Toxicol 2024; 47:314-321. [PMID: 36752088 DOI: 10.1080/01480545.2023.2174988] [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: 11/15/2022] [Revised: 01/17/2023] [Accepted: 01/24/2023] [Indexed: 02/09/2023]
Abstract
Vigabatrin (VGB) is a gammaaminobutyric acid-ergic (GABA-ergic) antiepileptic drug (AED) and is one of 2 approved drugs available to treat infantile spasms (IS). The aim of this study is to elucidate conflicting data on the toxic effects of VGB and to obtain detailed information about its possible cytogenotoxic effects in human lymphocytes. For this purpose, in vitro Chromosomal Aberration (CA), Sister Chromatid Exchange (SCE), Micronucleus (MN) tests, and Comet Assay were performed to determine possible genotoxic and cytotoxic effects of VGB. In addition, the binding energy level of VGB to DNA was determined in silico by molecular docking. The highest concentration (80 μg/ml) of VGB increased the SCE, CA, MN and micronucleated binuclear cell (BNMN) frequency significantly compared to the control after 24 and 48 hours of treatment. In the tail density and tail length parameters, the dose-dependent increase was found to be statistically significant compared to the control. At the 40 and 80 μg/ml concentrations of VGB for 48 hours caused a statistically significant increase in both CA/Cell and AC percentages, while MI and NDI decreased only significantly at the highest concentration (80 µg/ml) causing. In the Comet Assay head density, tail density and tail length parameters, the dose-dependent increase was found to be statistically significant compared to the control. Also, the in silico molecular docking analysis showed that VGB interacts with B-DNA close to the threshold binding energy. The lowest negative free binding energy (ΔG binding) was found as -5.13 kcal/mol. In conclusion, all results are evaluated together, it has been determined that VGB has cytogenotoxic effects in vitro and binds to DNA in silico with significant free binding energy.
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Affiliation(s)
- İbrahim Halil Kenger
- Faculty of Medicine, Department of Medical Genetics, Gaziantep Islam, Science, and Technology University, Gaziantep, Turkey
| | - Hamit Yıldız
- Faculty of Medicine, Department of Internal Medicine, Gaziantep University, Gaziantep, Turkey
| | - Mehmet Tahir Hüsunet
- Faculty of Medicine, Department of Medical Genetics, Gaziantep Islam, Science, and Technology University, Gaziantep, Turkey
| | - Lale DÖNbak
- Faculty of Science, Department of Biology, Kahramanmaras Sutcu Imam University, Onikişubat, Türkiye
| | - Ahmet Kayraldız
- Faculty of Science, Department of Biology, Kahramanmaras Sutcu Imam University, Onikişubat, Türkiye
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Zheng Q, He S, Xu SL, Ma MD, Fan M, Ge JF. Pharmacokinetics and tissue distribution of vigabatrin enantiomers in rats. Saudi Pharm J 2024; 32:101934. [PMID: 38223203 PMCID: PMC10787297 DOI: 10.1016/j.jsps.2023.101934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 12/21/2023] [Indexed: 01/16/2024] Open
Abstract
Purpose To investigate the pharmacokinetics and tissue distribution of VGB racemate and its single enantiomers, and explore the potential of clinic development for single enantiomer S-VGB. Methods In the pharmacokinetics study, male Sprague-Dawley rats were gavaged with VGB racemate or its single enantiomers dosing 50, 100 or 200 mg/kg, and the blood samples were collected during 12 h at regular intervals. In the experiment of tissue distribution, VGB and its single enantiomers were administered intravenously dosing 200 mg/kg, and the tissues including heart, liver, spleen, lung and kidney, eyes, hippocampus, and prefrontal cortex were separated at different times. The concentrations of R-VGB and S-VGB in the plasma and tissues were measured using HPLC. Results Both S-VGB and R-VGB could be detected in the plasma of rats administered with VGB racemate, reaching Cmax at approximately 0.5 h with t1/2 2-3 h. There was no significant pharmacokinetic difference between the two enantiomers when VGB racemate was given 200 mg/kg and 100 mg/kg. However, when given at the dose of 50 mg/kg, S-VGB presented a shorter t1/2 and a higher Cl/F than R-VGB, indicating a faster metabolism of S-VGB. Furthermore, when single enantiomer was administered respectively, S-VGB presented a slower metabolism than R-VGB, as indicated by a longer t1/2 and MRT but a lower Cmax. Moreover, compared with the VGB racemate, the single enantiomers S-VGB and R-VGB had shorter t1/2 and MRT, higher Cmax and AUC/D, and lower Vz/F and Cl/F, indicating the stronger oral absorption and faster metabolism of single enantiomer. In addition, regardless of VGB racemate administration or single enantiomer administration, S-VGB and R-VGB had similar characteristics in tissue distribution, and the content of S-VGB in hippocampus, prefrontal cortex and liver was much higher than that of R-VGB. Conclusions Although there is no transformation between S-VGB and R-VGB in vivo, those two enantiomers display certain disparities in the pharmacokinetics and tissue distribution, and interact with each other. These findings might be a possible interpretation for the pharmacological and toxic effects of VGB and a potential direction for the development and optimization of the single enantiomer S-VGB.
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Affiliation(s)
- Qiang Zheng
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
| | - Shuai He
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
| | - Song-Lin Xu
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
| | - Meng-Die Ma
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
| | - Min Fan
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
| | - Jin-Fang Ge
- School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, PR China
- Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, Anhui 230032, PR China
- The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, PR China
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The Discordance between Network Excitability and Cognitive Performance Following Vigabatrin Treatment during Epileptogenesis. Life (Basel) 2021; 11:life11111213. [PMID: 34833089 PMCID: PMC8618433 DOI: 10.3390/life11111213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 10/29/2021] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
Vigabatrin (VGB), a potent selective γ-aminobutyric acid transaminase (GABA-T) inhibitor, is an approved non-traditional anti-seizure drug for patients with intractable epilepsy. Nevertheless, its effect on epileptogenesis, and whether this effect is correlated with post-epileptogenic cognitive function remain unclear. Based on lithium-pilocarpine-induced seizure modeling, we evaluated the effect of VGB on epileptogenesis and neuronal damage following status epilepticus in Sprague-Dawley rats. Cognitive evaluations were performed with the aid of inhibitory avoidance testing. We found that VGB could interrupt epileptogenesis by reducing spontaneous recurrent seizures, hippocampal neuronal damage, and chronic mossy fiber sprouting. Nevertheless, VGB did not help with the retention of cognitive performance. Our findings suggest that further research into the role of VGB in epileptogenesis and the treatment of epilepsy in clinical practice is warranted.
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Mazeto TK, Picada JN, Correa ÁP, Rebelo IN, Ribeiro MT, Gomez MV, de Souza AH. Antinociceptive and genotoxic assessments of the antagonist TRPV1 receptor SB-366791 on morphine-induced tolerance in mice. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2020; 393:481-490. [PMID: 31655852 DOI: 10.1007/s00210-019-01748-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 10/09/2019] [Indexed: 12/17/2022]
Abstract
Chronic pain is mainly treated with opioid analgesics such as morphine. However, the use of these substances can cause adverse effects, including dependence and tolerance, necessitating the discovery of a new approach to analgesic therapies. The transient receptor potential vanilloid 1 (TRPV1) is linked to thermal sensibility and has been considered as a new therapeutic option for pain treatment. This study aims to investigate the antinociceptive effect and toxicity of SB-366791, a TRPV1 antagonist. Morphine-tolerant and morphine non-tolerant Swiss mice were submitted to the hot plate and thermal tail flick tests. Toxicological evaluations of the genotoxic and mutagenic activities of SB-366791 were assessed using a comet assay and micronucleus test, and the Salmonella/microsome mutagenicity assay. In the hot plate test, intrathecal injection of SB-366791 or morphine resulted in significantly increased antinociception in non-tolerant mice. SB-366791 also led to an analgesic effect in the tail flick test. Tolerant mice that received SB-366791 demonstrated a central antinociceptive effect in both thermal tests. No genotoxic effects were observed in the comet assay and no mutagenic effects were detected in the micronucleus test or in the Salmonella/microsome assay. Behavioral results of the thermal nociception tests show that SB-366791 has antinociceptive potential in both morphine-tolerant and non-tolerant mice and does not cause genotoxic or mutagenic effects. Nevertheless, new studies should be performed to clarify the activity and participation of vanilloid channels in the antinociception of SB-366791.
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Affiliation(s)
- Thiago Kastell Mazeto
- Graduate Program in Cellular and Molecular Biology Applied to Health Sciences, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
| | - Jaqueline Nascimento Picada
- Graduate Program in Cellular and Molecular Biology Applied to Health Sciences, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil.
- Graduate Program in Genetics and Applied Toxicology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil.
| | - Áurea Pandolfo Correa
- Department of Pharmacology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
| | - Isadora Nunes Rebelo
- Department of Pharmacology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
| | - Magali Terra Ribeiro
- Graduate Program in Genetics and Applied Toxicology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
| | - Marcus Vinícius Gomez
- Department of Neurotransmitters, Institute for Education and Research, Hospital Santa Casa, Domingos Vieira Street, 590, Belo Horizonte, MG, CEP 30150-240, Brazil
| | - Alessandra Hubner de Souza
- Graduate Program in Cellular and Molecular Biology Applied to Health Sciences, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
- Graduate Program in Genetics and Applied Toxicology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
- Department of Pharmacology, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, CEP 92425-900, Brazil
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da Costa E Silva LD, Pereira P, Regner GG, Boaretto FBM, Hoffmann C, Pflüger P, da Silva LL, Steffens LR, Morás AM, Moura DJ, Picada JN. DNA damage and oxidative stress induced by seizures are decreased by anticonvulsant and neuroprotective effects of lobeline, a candidate to treat alcoholism. Metab Brain Dis 2018; 33:53-61. [PMID: 29032429 DOI: 10.1007/s11011-017-0130-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 10/09/2017] [Indexed: 12/28/2022]
Abstract
The alkaloid lobeline (Lob) has been studied due to its potential use in treatment of drug abuse. This study evaluates the possible anticonvulsant and neuroprotective activities of Lob to obtain new information on its properties that could confirm it as a candidate in the treatment of alcohol addiction. The anticonvulsant effect of Lob was evaluated using a pilocarpine-induced seizure model. In addition, possible neuroprotective effects were investigated measuring DNA damage using the comet assay, assessing free radical levels by dichlorofluorescein diacetate (DCF) oxidation, and measuring the antioxidant potential using the α, α-diphenyl-β-picrylhydrazyl (DPPH) scavenging assay, besides measuring superoxide dismutase (SOD) and catalase (CAT) enzyme activities in brain tissues. Lobeline increased the latency to the first seizure and decreased the percentage of seizures in a similar way as diazepam, used as control. DNA damage induced by Pil and hydrogen peroxide were decreased in hippocampus and cerebral cortex from mice treated with Lob. The levels of free radicals and CAT activity increased in cortex and hippocampus, respectively, in mice treated with Pil. Lobeline decreased CAT in hippocampus, leading to similar values as in the saline negative control. In conclusion, Lob has anticonvulsant and neuroprotective actions that may be mediated by antioxidant-like mechanisms, indicating its potential as candidate drug in alcoholism therapy.
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Affiliation(s)
- Liana Dantas da Costa E Silva
- Laboratory of Toxicological Genetics, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, 2425-900, Brazil
| | - Patrícia Pereira
- Laboratory of Neuropharmacology and Preclinical Toxicology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Gabriela Gregory Regner
- Laboratory of Neuropharmacology and Preclinical Toxicology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Fernanda Brião Menezes Boaretto
- Laboratory of Toxicological Genetics, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, 2425-900, Brazil
| | - Cleonice Hoffmann
- Laboratory of Toxicological Genetics, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, 2425-900, Brazil
| | - Pricila Pflüger
- Laboratory of Neuropharmacology and Preclinical Toxicology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Lucas Lima da Silva
- Laboratory of Neuropharmacology and Preclinical Toxicology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Luiza Reinhardt Steffens
- Laboratory of Genetic Toxicology, Federal University of Health Science of Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Ana Moira Morás
- Laboratory of Genetic Toxicology, Federal University of Health Science of Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Dinara Jaqueline Moura
- Laboratory of Genetic Toxicology, Federal University of Health Science of Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Jaqueline Nascimento Picada
- Laboratory of Toxicological Genetics, Lutheran University of Brazil (ULBRA), Farroupilha Avenue, 8001, Canoas, RS, 2425-900, Brazil.
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de Sousa JA, Pereira P, Allgayer MDC, Marroni NP, de Barros Falcão Ferraz A, Picada JN. Evaluation of DNA damage in Wistar rat tissues with hyperlipidemia induced by tyloxapol. Exp Mol Pathol 2017; 103:51-55. [DOI: 10.1016/j.yexmp.2017.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 06/26/2017] [Accepted: 06/30/2017] [Indexed: 12/19/2022]
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