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1.
Exp Eye Res ; : 110104, 2024 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-39303844

RESUMO

Dysfunction of the extraorbital lacrimal gland (ELG) can lead to loss of vision due to damage to the epithelium of cornea. The broad-spectrum anti-epileptic drug sodium valproate (SV) has numerous side effects. Moringa oleifera (M.oleifera) is widely used as a food and in folk medicine. The effects of orally administered SV and M. oleifera hydroalcoholic leaf extract on rat ELG were investigated in this study by analysing both antioxidant and oxidant parameters. Additionally, boron level and tissue factor (TF) activity were determined. Protein changes were detected by sodium dodecyl sulfate gel electrophoresis (SDS-PAGE). Significantly lower values of glutathione (GSH), superoxide dismutase (SOD), catalase (CAT) and total antioxidant status (TAS) were observed in the SV group compared to the control group. Treatment with Moringa extract significantly increased SOD, CAT and TAS values in the Moringa given SV group (SVM). While no significant differences were observed between the sialic acid values of the groups, lipid peroxidation (LPO), nitric oxide (NO) and total oxidant status (TOS) values were significantly elevated in the SV group compared to the control group. Due to the effect of Moringa extract, LPO, NO and TOS levels were significantly decreased in the SVM group compared to the SV group. TF activity was not meaningfully altered between groups. Compared to control rats, oxidative stress index (OSI) level significantly increased, whereas the boron level decreased in the SV group. Moringa extract treatment noticeably reduced OSI in the SVM group. According to SDS-PAGE, decreases in the density of protein bands with molecular weights of 51, 83, and 90 kDa were observed in SV given rats compared to the other groups. These decreases were reversed by the administration of Moringa extract. Moringa extract has shown protective properties arising from antioxidant potential, especially with its very low OSI value. Individuals undergoing SV treatment and having ELG complications might consider using Moringa extract to mitigate valproate induced damage.

2.
Toxicol Mech Methods ; 34(8): 920-925, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39319528

RESUMO

Valproic acid (VA) is a broad-spectrum anticonvulsant agent that acts through several molecular mechanisms to control different types of seizures. The main concern of the drug is its liver toxicity. Considering the regulatory roles of the Farnesoid nuclear receptors and the nuclear transcription factor Nrf2 in modifying and neutralizing the harmful effects of oxidative damage, the present study was designed to evaluate the role of FXR-Nrf2 and some downstream target gene alterations in hepatotoxicity induced by VA. Thirty-five eight-week-old male albino mice were randomly divided into five groups, including a control group, and four groups were assigned to receive VA (300 mg/kg/day; oral) for 3, 7, 10, and 14 days. Serum levels of ALT, AST, ALP, and total and direct bilirubin (TB, DB) were measured. Liver histology and the expression of FXR, Nrf2, α-GST, SOD, and TNF-α were assessed using H&E staining and real-time RT-PCR techniques. Maximum extent of biochemical and histopathological damage was observed on the 14th day, but changes in the expression of FXR, Nrf2, α-GST, and SOD were seen at three points: a significant upregulation on the 3rd day, a remarkable downregulation on the 10th day, and a second-time upregulation on the 14th day. In conclusion, considering the observed dysregulation in FXR-Nrf2 cascade expression during VA administration, it seems that downregulation in this pathway and consequently its downstream detoxification and antioxidant genes may play a role in liver toxicity.


Assuntos
Anticonvulsivantes , Doença Hepática Induzida por Substâncias e Drogas , Fígado , Fator 2 Relacionado a NF-E2 , Receptores Citoplasmáticos e Nucleares , Ácido Valproico , Animais , Ácido Valproico/toxicidade , Masculino , Receptores Citoplasmáticos e Nucleares/metabolismo , Receptores Citoplasmáticos e Nucleares/genética , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Camundongos , Fator 2 Relacionado a NF-E2/metabolismo , Fator 2 Relacionado a NF-E2/genética , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/genética , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Doença Hepática Induzida por Substâncias e Drogas/patologia , Anticonvulsivantes/toxicidade , Estresse Oxidativo/efeitos dos fármacos , Fatores de Tempo
3.
Epilepsy Behav ; 159: 110024, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39217754

RESUMO

PURPOSE: Prenatal exposure to antiseizure medications (ASMs) has been associated with an increased risk of major malformations and neurodevelopmental disorders, with the latter being mainly associated with valproate (VPA). Our aim was to compare neurocognitive outcome at age 6-7 years in children exposed prenatally to lamotrigine (LTG), carbamazepine (CBZ), valproate (VPA) or levetiracetam (LEV) monotherapy. METHODS: Eligible mother-child pairs were identified from the observational prospective multinational EURAP cohort study. Assessor-blinded testing was conducted at age 6-7 years using WISC-III and NEPSY-II. Verbal IQ (VIQ), performance IQ (PIQ), full scale IQ (FSIQ) and performance in neuropsychological tasks were compared across ASM groups by ANOVA. Scores were adjusted for maternal IQ, paternal education, maternal epilepsy type and child sex. RESULTS: Of 169 children enrolled in the study, 162 (LTG n = 80, CBZ n = 37, VPA n = 27, LEV n = 18) had sufficient data from WISC-III, NEPSY-II or both, and were included in the analyses. Observed (unadjusted) PIQ and FSIQ did not differ across exposure groups, but a difference was identified for VIQ (P<0.05), with children exposed to VPA having lower scores than children exposed to LEV (P<0.05) and children from all groups combined (P<0.01). Adjusted VIQ, PIQ and FSIQ scores did not differ significantly across groups, but VPA-exposed children had borderline significantly lower adjusted VIQ scores than children from all groups combined (P=0.051). VPA-exposed children had lower scores in comprehension of instructions before and after adjustment for confounding variables than children exposed to LTG (P<0.001), LEV (P<0.01) or children from all groups combined (p < 0.001). The VPA-exposed group also had lower scores in immediate and delayed memory for faces compared to children exposed to CBZ (P<0.05 and P<0.001, respectively) and LTG (P<0.05 and P<0.02, respectively), and children from all groups combined (P<0.02 and P<0.001, respectively). LEV-exposed children had lower scores in delayed memory for names than children exposed to LTG (P<0.001), CBZ (P<0.001), VPA (P<0.05) and children from all groups combined (P<0.001). CONCLUSIONS: Consistent with previous reports, our results provide evidence for an adverse effect of prenatal exposure to valproate on verbal development. Our finding of relatively weaker performance of VPA-exposed children compared to other ASM exposures in both comprehension of instructions and face memory also suggest that children of mothers treated with VPA are at increased risk for compromised memory functions or altered processing of socially relevant information.


Assuntos
Anticonvulsivantes , Carbamazepina , Epilepsia , Lamotrigina , Levetiracetam , Efeitos Tardios da Exposição Pré-Natal , Ácido Valproico , Humanos , Feminino , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Anticonvulsivantes/efeitos adversos , Criança , Gravidez , Masculino , Levetiracetam/efeitos adversos , Ácido Valproico/efeitos adversos , Lamotrigina/efeitos adversos , Lamotrigina/uso terapêutico , Carbamazepina/efeitos adversos , Epilepsia/tratamento farmacológico , Testes Neuropsicológicos , Triazinas/efeitos adversos , Estudos de Coortes , Piracetam/análogos & derivados , Piracetam/efeitos adversos , Adulto , Cognição/efeitos dos fármacos , Estudos Prospectivos , Inteligência/efeitos dos fármacos
4.
Psychopharmacol Bull ; 54(4): 131-133, 2024 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-39263199

RESUMO

Valproate and Autism complexity is manifold. From an established environmental risk factor for autism, to a translational animal model, valproate's composite mode of action might unfold to address core autistic domains transcending mere aggressive behavioural control.


Assuntos
Transtorno Autístico , Ácido Valproico , Ácido Valproico/efeitos adversos , Ácido Valproico/administração & dosagem , Humanos , Animais , Transtorno Autístico/induzido quimicamente , Transtorno Autístico/tratamento farmacológico , Anticonvulsivantes/efeitos adversos , Anticonvulsivantes/administração & dosagem , Agressão/efeitos dos fármacos , Modelos Animais de Doenças
5.
Artigo em Inglês | MEDLINE | ID: mdl-39270067

RESUMO

Valproic acid or sodium valproate is a widely used drug in the treatment of epilepsy, although it also appears to have anxiolytic and sedative properties derived from its agonistic action on the GABAergic system. To analyze these potential effects of the drug, we conducted three experiments with rats using procedures designed to assess anxiety in rodents. In the first experiment, with a fear conditioning procedure, three groups of male rats were included that received either 100 mg/kg or 300 mg/kg of valproate or an equivalent volume of saline solution. In Experiment 2, recording spontaneous activity in an open field, we compared the effects of valproic acid (300 mg/kg) on male and female rats. In the third experiment, we analyzed the effect of valproic acid using a novelty-induced hypophagia test and tested again for potential differences as a function of the sex of the animals. The results showed an anxiolytic effect restricted to the 300 mg/kg dose of the drug in Experiment 1. Such an effect was restricted to the female sample in Experiment 2, but in the third experiment affected both sexes. As for the sedative effect, it was observed in all experiments irrespective of the sex of the rats. These findings hold significant implications for the treatment of anxiety disorders since valproate may offer a novel therapeutic approach for anxiety-related conditions with distinct benefits and fewer side effects. However, clinical studies are needed to validate the translation of these findings from animal models to human patients.

7.
Cureus ; 16(7): e65390, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39184772

RESUMO

BACKGROUND: Sodium valproate (VPA) is an extensively used anti-convulsant, which is an effective drug for treatment of epilepsy in adults and children, as well as for conditions like migraine, bipolar disorder, mania, and trigeminal neuralgia. Sedation, vertigo, ataxia, dose-dependent tremors, headaches, and gastrointestinal side effects are the most often reported adverse effects associated with VPA. A potential life-threatening event reported with VPA is hyperammonemia (HA), which is defined as an increase in serum level of ammonia. Only 587 reported cases of HA were found in the VigiAccess database, representing a mere 0.6% of the 95,000 reported adverse events linked to VPA. Hence, this case series was conducted with emphasis on monitoring of increased serum ammonia levels with or without hepatic enzymes increase for patients who are on VPA. AIMS AND OBJECTIVES: To assess elevated serum ammonia levels following VPA administration, and to ascertain the percentage of individuals with hepatic enzymes increased who took VPA and subsequently had elevated serum ammonia levels. METHODS: This study was conducted at the adverse drug reaction (ADR) monitoring centre (AMC) of the Pharmacovigilance Programme of India (PvPI) and Department of Psychiatry, Christian Medical College and Hospital (CMC&H), Ludhiana. The study comprised of 12 patients who were exclusively on VPA and exhibited symptoms related to elevated serum ammonia. An informed consent form (ICF) was provided to the patient prior to taking their personal details. Laboratory investigations were done to establish the diagnosis and liver function tests (LFTs), chiefly ALT (alanine transferase) and AST (aspartate aminotransferase) were also performed. It is a descriptive study which was for a time period of six months.  Results: This study includes 12 patients who had HA confirmed by laboratory investigation. Out of these 12 patients, two patients (17%) had a corresponding increase in LFT. The average as of the patients was 53.08 years and average serum ammonia levels were 219.15. None of the patients who presented with HA progressed to hyperammonemic encephalopathy (HAE). CONCLUSION:  This case series on valproate-induced HA should be of interest to psychiatrists, physicians, internists, family medicine physicians, hospitalists, and surgeons who will have patients on VPA. Delay in recognition of HA can result in the development of potentially life-threatening complications. Rapid diagnosis and management will help in reducing the number of cases which progress to encephalopathy which is highly fatal.

8.
Neuroscience ; 558: 92-104, 2024 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-39168175

RESUMO

This study aimed to evaluate the potential benefits of acetyl-L-carnitine (ALCAR) in the context of valproate-induced autism. After prenatal exposure to valproate (VPA; 600 mg/kg, i.p.) on embryonic day 12.5, followed by ALCAR treatment (300 mg/kg on postnatal days 21-49, p.o.), assessment of oxidative stress, mitochondrial membrane potential (MMP), mitochondrial biogenesis, parvalbumin interneurons, and hippocampal volume was conducted. These assessments were carried out subsequent to the evaluation of autism-like behaviors. Hippocampal analysis of oxidative factors (reactive oxygen species and malondialdehyde) and antioxidants (superoxide dismutase, catalase, and glutathione) revealed a burden of oxidative stress in VPA rats. Additionally, mitochondrial biogenesis and MMP were elevated, while the number of parvalbumin interneurons decreased. These changes were accompanied by autism-like behaviors observed in the three-chamber maze, marble burring test, and Y-maze, as well as a learning deficit in the Barnes maze. In contrast, administrating ALCAR attenuated behavioral deficits, reduced oxidative stress, improved parvalbumin-positive neuronal population, and properly modified MMP and mitochondrial biogenesis. Collectively, our results indicate that oral administration of ALCAR ameliorates autism-like behaviors, partly through its targeting oxidative stress and mitochondrial biogenesis. This suggests that ALCAR may have potential benefits ASD managing.


Assuntos
Acetilcarnitina , Transtorno Autístico , Hipocampo , Mitocôndrias , Estresse Oxidativo , Ácido Valproico , Animais , Ácido Valproico/farmacologia , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Acetilcarnitina/farmacologia , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Transtorno Autístico/induzido quimicamente , Transtorno Autístico/tratamento farmacológico , Transtorno Autístico/metabolismo , Feminino , Masculino , Gravidez , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Ratos , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Efeitos Tardios da Exposição Pré-Natal/metabolismo , Ratos Sprague-Dawley , Modelos Animais de Doenças , Comportamento Animal/efeitos dos fármacos
9.
Genet Med ; 26(10): 101226, 2024 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-39097820

RESUMO

PURPOSE: Valproic acid or valproate is an effective antiepileptic drug; however, embryonic exposure to valproate can result in a teratogenic disorder referred to as fetal valproate syndrome (OMIM #609442). Currently there are no diagnostic biomarkers for the condition. This study aims to define an episignature biomarker for teratogenic antenatal exposure to valproate. METHODS: DNA extracted from peripheral blood of individuals with teratogenic antenatal exposure to valproate was processed using DNA methylation microarrays. Subsequently, methylation profiling and construction of support vector machine classifiers were performed in R. RESULTS: Genomic DNA methylation analysis was applied, and a distinct DNA methylation profile was identified in the majority of affected individuals. This profile was used to develop a diagnostic episignature classifier. The valproate exposure episignature exhibited high sensitivity and specificity relative to a large reference data set of unaffected controls and individuals with a wide spectrum of syndromic disorders with episignatures. Gene set enrichment analysis demonstrated an enrichment for terms associated with cell adhesion, including significant overrepresentation of the cadherin superfamily. CONCLUSION: This study provides evidence of a robust peripheral blood-based diagnostic epigenetic biomarker for a prenatal teratogenic disorder.

10.
Seizure ; 121: 123-132, 2024 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-39146708

RESUMO

PURPOSE: To evaluate the incidence of insulin resistance and its association with change in serum anti-seizure medication (ASM) level and their pharmacokinetic, body composition and metabolic hormones after six months of levetiracetam (LEV) exposure in persons with epilepsy (PWE) in comparison to valproate (VPA). METHODS: This prospective-longitudinal study included clinically diagnosed PWE on VPA or LEV monotherapy (for<3 months). At enrolment, body weight/composition, BMI were measured and blood samples were collected for assessing metabolic dysfunctions by estimation of serum insulin, insulin resistance [in terms of Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)], leptin, adiponectin, lipid profile along with ASMs level. Subjects were followed up for six months and all the above parameters were reassessed. RESULTS: A total of 150 PWE were screened based on inclusion and exclusion criteria, and 105 number of subjects were enrolled (n = 35 in VPA and n = 70 in LEV group). Out of them, 92 subjects (n = 32 in VPA; n = 60 in LEV) completed six months follow-up. After six months, serum insulin level increased significantly in VPA group compared to baseline p < 0.001). Insulin resistance (HOMA-IR>2.5) was observed in 14.28 % of PWE in VPA group. Significantly higher percentage-change in body-weight (p = 0.003), leptin and decreased adiponectin were found in VPA-group compared to baseline ((p = 0.003, 0.02, 0.001, <0.001, respectively). These changes were independent of serum level or pharmacokinetic of VPA. On the other hand, no such changes were observed in LEV-group despite increased serum LEV level and altered pharmacokinetic parameters after six months. CONCLUSION: Six months treatment with VPA resulted in insulin resistance and metabolic dysfunctions in PWE. These alterations were not correlated with change in VPA serum level. These changes were not observed in LEV therapy suggesting its better safety profile. This may be considered while prescribing the ASM like VPA and LEV in adult patients with obesity or insulin resistance and diabetes.

11.
Eur J Clin Pharmacol ; 2024 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-39150536

RESUMO

BACKGROUND: Monitoring free valproate concentrations, as with other highly protein-bound anticonvulsants, is essential in clinical situations where protein binding may be disrupted. Conversion of measured total concentrations to approximate free concentrations offers a cost-effective alternative. This study evaluated the relationship between total and free valproate concentrations for discordance and the impact of key determinants. A novel formula was devised that incorporates significant variables. METHODS: A multicentre, cross-sectional observational analytical study included 101 subjects 18 years and older using valproate for 6 months or longer. Participants were recruited from private and public sector healthcare settings from primary to tertiary level in, South Africa, during 2017-2019. RESULTS: Free valproate concentrations could be measured for 84 subjects. Discordance for concomitant total and free valproate concentrations was 79.1%. Among 19 participants with elevated free concentrations, 15 (78.9%) had total valproate concentrations within the recommended reference range. Calculations based on the study-derived formula were more accurate in predicting free valproate concentration than previously proposed methods. CONCLUSION: This study proposes that the novel formula for calculating free valproate enables more accurate prediction.

12.
Cells ; 13(16)2024 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-39195239

RESUMO

Autism spectrum disorder (ASD) is a multifactorial neurodevelopmental condition with several identified risk factors, both genetic and non-genetic. Among these, prenatal exposure to valproic acid (VPA) has been extensively associated with the development of the disorder. The zebrafish, a cost- and time-effective model, is useful for studying ASD features. Using validated VPA-induced ASD zebrafish models, we aimed to provide new insights into VPA exposure effects during embryonic development and to identify new potential biomarkers associated with ASD-like features. Dose-response analyses were performed in vivo to study larval phenotypes and mechanisms underlying neuroinflammation, mitochondrial dysfunction, oxidative stress, microglial cell status, and motor behaviour. Wild-type and transgenic Tg(mpeg1:EGFP) zebrafish were water-exposed to VPA doses (5 to 500 µM) from 6 to 120 h post-fertilisation (hpf). Embryos and larvae were monitored daily to assess survival and hatching rates, and numerous analyses and tests were conducted from 24 to 120 hpf. VPA doses higher than 50 µM worsened survival and hatching rates, while doses of 25 µM or more altered morphology, microglial status, and larval behaviours. VPA 50 µM also affected mRNA expression of inflammatory cytokines and neurogenesis-related genes, mitochondrial respiration, and reactive oxygen species accumulation. The study confirmed that VPA alters brain homeostasis, synaptic interconnections, and neurogenesis-related signalling pathways, contributing to ASD aetiopathogenesis. Further studies are essential to identify novel ASD biomarkers for developing new drug targets and tailored therapeutic interventions for ASD.


Assuntos
Transtorno do Espectro Autista , Modelos Animais de Doenças , Ácido Valproico , Peixe-Zebra , Animais , Ácido Valproico/farmacologia , Ácido Valproico/efeitos adversos , Transtorno do Espectro Autista/induzido quimicamente , Transtorno do Espectro Autista/genética , Transtorno do Espectro Autista/patologia , Larva/efeitos dos fármacos , Animais Geneticamente Modificados , Estresse Oxidativo/efeitos dos fármacos , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Microglia/efeitos dos fármacos , Microglia/patologia , Microglia/metabolismo , Encéfalo/efeitos dos fármacos , Encéfalo/patologia , Encéfalo/metabolismo , Embrião não Mamífero/efeitos dos fármacos , Embrião não Mamífero/metabolismo , Neurogênese/efeitos dos fármacos
13.
QJM ; 2024 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-39171837

RESUMO

A neonate born to nonconsanguineous parents was evaluated for dysmorphic features. The neonate was born at term by normal vaginal delivery. The mother has had epilepsy for 12 years and has been on sodium valproate (700 mg/day) since conception and throughout pregnancy. Examination revealed facial dysmorphism, including triangular forehead, sparse arched eyebrows, telecanthus, flat nasal bridge, long thin upper vermilion border, smooth philtrum, and low-set ears. The limb anomalies observed were arachnodactyly, wrist and elbow contractures, clinodactyly, hypoplastic toenails, and overlapping toes. The other dysmorphisms noted were widely spaced nipples and hypospadias. Ultrasonogram (USG) cranium showed bilateral choroid plexus cysts, and USG abdomen revealed bilateral mild hydronephrosis. 2D-Echocardiography revealed a small patent ductus arteriosus (PDA). A diagnosis of fetal valproate syndrome (FVS) was considered, and other differentials, including fetal alcohol syndrome and genetic conditions, were ruled out by a clinical geneticist review. The index neonate is currently on multidisciplinary follow-up. The index neonate had common features of FVS as described in the literature, in addition to wrist and elbow contractures. Apart from the anomalies, there is a significant risk for neurocognitive delay and neurodevelopmental disorders. Postnatally, these babies need multidisciplinary care and neurodevelopmental follow-up. Valproate use for treating epilepsy in pregnant women and women of childbearing age may be restricted, and alternative choices of ASMs with better safety profiles should be preferred. Facial dysmorphism and limb anomalies in fetal valproate syndrome may occur irrespective of the dose of sodium valproate. Fetal valproate syndrome may present with wrist and elbow contractures.

14.
Birth Defects Res ; 116(8): e2392, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39189597

RESUMO

On January 12, 2024 the safety committee of the European Medicines Agency (EMA) recommended precautionary measures over a potential risk of neurodevelopmental disorders in children born to men treated with valproate. These new measures recommend patient supervision by a specialist in the management of epilepsy, bipolar disorder, or migraine. In the United Kingdom, the Medicines and Healthcare products Regulatory Agency (MHRA) issued a far more stringent precaution, warning against prescribing valproate to anyone under 55 years of age. We, members of the European Network of Teratology Information Services (ENTIS) and the Organization of Teratology Information Specialists (OTIS), believe that the EMA and MHRA warnings were premature. We are of the opinion that the underlying scientific data do not convincingly substantiate the inference of a paternally mediated risk from valproate to children, much less to an extent that justifies these far-reaching recommendations.


Assuntos
Transtornos do Neurodesenvolvimento , Ácido Valproico , Humanos , Ácido Valproico/efeitos adversos , Transtornos do Neurodesenvolvimento/prevenção & controle , Transtornos do Neurodesenvolvimento/induzido quimicamente , Masculino , Criança , Epilepsia/tratamento farmacológico , Reino Unido , Anticonvulsivantes/efeitos adversos , Anticonvulsivantes/uso terapêutico , Feminino
15.
Food Chem Toxicol ; 192: 114926, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39147356

RESUMO

Valproic acid (VPA), a common antiepileptic drug, can cause liver steatosis after long-term therapy. However, an impact of ferroptosis on VPA-induced liver steatosis has not been investigated. In the study, treatment with VPA promoted ferroptosis in the livers of mice by elevating ferrous iron (Fe2+) levels derived from the increased absorption by transferrin receptor 1 (TFR1) and the decreased storage by ferritin (FTH1 and FTL), disrupting the redox balance via reduced levels of solute carrier family 7 member 11 (SLC7A11), glutathione (GSH), and glutathione peroxidase 4 (GPX4), and augmenting acyl-CoA synthetase long-chain family member 4 (ACSL4) -mediated lipid peroxide generation, accompanied by enhanced liver steatosis. All the changes were significantly reversed by co-treatment with an iron-chelating agent, deferoxamine mesylate (DFO) and a ferroptosis inhibitor, ferrostatin-1 (Fer-1). Similarly, the increases in Fe2+, TFR1, and ACSL4 levels, as well as the decreases in GSH, GPX4, and ferroportin (FPN) levels, were detected in VPA-treated HepG2 cells. These changes were also attenuated after co-treatment with Fer-1. It demonstrates that ferroptosis promotes VPA-induced liver steatosis through iron overload, inhibition of the GSH-GPX4 axis, and upregulation of ACSL4. It offers a potential therapy targeting ferroptosis for patients with liver steatosis following VPA treatment.


Assuntos
Coenzima A Ligases , Fígado Gorduroso , Ferroptose , Fosfolipídeo Hidroperóxido Glutationa Peroxidase , Receptores da Transferrina , Ácido Valproico , Ferroptose/efeitos dos fármacos , Animais , Ácido Valproico/toxicidade , Camundongos , Fosfolipídeo Hidroperóxido Glutationa Peroxidase/metabolismo , Coenzima A Ligases/metabolismo , Coenzima A Ligases/genética , Humanos , Fígado Gorduroso/induzido quimicamente , Fígado Gorduroso/metabolismo , Masculino , Receptores da Transferrina/metabolismo , Receptores da Transferrina/genética , Ferro/metabolismo , Camundongos Endogâmicos C57BL , Ferritinas/metabolismo , Glutationa/metabolismo , Células Hep G2 , Sistema y+ de Transporte de Aminoácidos/metabolismo , Sistema y+ de Transporte de Aminoácidos/genética , Fígado/efeitos dos fármacos , Fígado/metabolismo
16.
Clin Ther ; 46(7): e26-e30, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38972763

RESUMO

PURPOSE: Although prescription of direct oral anticoagulants (DOACs) for epileptic patients on anti-seizure medications (ASMs) is on the increase, international guidelines pose strict restrictions because this may lead to pharmacologic interactions. However, current evidence on their clinical relevance remains scanty. This retrospective, case-control study assessed the frequency of ischemic/hemorrhagic events and epileptic seizures involving DOAC-ASM cotherapy in the real world, compared with DOAC and ASM monotherapy, in age- and gender-matched controls. METHODS: Data on patients who had been prescribed a concomitant DOAC and ASM therapy for at least 6 months were extracted from the database of the Pharmaceutical Service of the Alessandria Province (Italy). After exclusions, the case group included 124 patients, 44 on valproic acid (VPA) and 80 on levetiracetam (LEV) concomitant with a DOAC, and it was compared with the DOAC-control and ASM-control groups. The clinical and laboratory data were extracted from the electronic archives of the hospitals in the same province. FINDINGS: Two (1.6%) ischemic and 2 (1.6%) major hemorrhagic events were observed in the case group. Four (3.2%) ischemic and no hemorrhagic events occurred in the DOAC-control group. There were no statistically significant differences in the ischemic and hemorrhagic events between the case group (patients on concomitant LEV or VPA who were prescribed a DOAC) and the DOAC-control group, and there was no difference in the recurrence rate of epileptic seizures between the case group and the ASM-control group. IMPLICATIONS: Although this study has some limits, mainly the small sample size, our findings indicate that neither LEV nor VPA concomitant treatment significantly affects the effects of DOACs in a real-world setting.


Assuntos
Anticoagulantes , Anticonvulsivantes , Humanos , Estudos Retrospectivos , Feminino , Anticonvulsivantes/administração & dosagem , Anticonvulsivantes/efeitos adversos , Anticonvulsivantes/uso terapêutico , Masculino , Estudos de Casos e Controles , Idoso , Pessoa de Meia-Idade , Administração Oral , Anticoagulantes/administração & dosagem , Anticoagulantes/efeitos adversos , Anticoagulantes/uso terapêutico , Epilepsia/tratamento farmacológico , Itália , Interações Medicamentosas , Ácido Valproico/administração & dosagem , Ácido Valproico/uso terapêutico , Ácido Valproico/efeitos adversos , Levetiracetam/administração & dosagem , Levetiracetam/uso terapêutico , Levetiracetam/efeitos adversos , Quimioterapia Combinada , Hemorragia/induzido quimicamente , Hemorragia/epidemiologia , Idoso de 80 Anos ou mais , Convulsões/tratamento farmacológico , Adulto
17.
Oncol Lett ; 28(3): 432, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39049983

RESUMO

p16INK4a and p21WAF1/Cip1 are cyclin-dependent kinase inhibitors involved in cell cycle control, which can function as oncogenes or tumor suppressors, depending on the context of various extracellular and intracellular signals, and cell type. In human papillomavirus-induced cervical cancer, p16 INK4a shows oncogenic activity and functions as a diagnostic marker of cervical neoplasia, whereas p21 WAF1/Cip1 acts as a tumor suppressor and its downregulation is associated with the progression of malignant transformation. Several histone deacetylase (HDAC) inhibitors promote the positive and negative regulation of a number of genes, including p16 INK4a and p21 WAF1/Cip1; however, the effects of sodium valproate (VPA) on these genes and on the proteins they encode remain uncertain in HeLa cervical cancer cells. In the present study, these effects were investigated in HeLa cells treated with 0.5 or 2 mM VPA for 24 h, using reverse transcription-quantitative PCR, confocal microscopy and western blotting. The results revealed a decrease in the mRNA expression levels of p16 INK4a and a tendency for p16INK4a protein abundance to decrease in the presence of 2 mM VPA. By contrast, an increase in the protein expression levels of p21WAF1/Cip1 was detected in the presence of 0.5 and 2 mM VPA. Furthermore, VPA was confirmed to inhibit HDAC activity and induce global hyperacetylation of histone H3. Notably, VPA was shown to suppress p16 INK4a, a biomarker gene of cervical carcinoma, and to increase the abundance of the tumor suppressor protein p21WAF1/Cip1, thus contributing to the basic knowledge regarding the antitumorigenic potential of VPA. Exploration of epigenetic changes associated with the promoters of p16 INK4a and p21 WAF1/Cip1, such as histone H3 methylation, may provide further information and improve the understanding of these findings.

18.
Cureus ; 16(6): e63093, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-39055475

RESUMO

Valproic acid (VPA), or sodium valproate, is a frequently prescribed medication for many psychiatric conditions, notably for the management of bipolar affective disorder. While its common side effects are well known and thoroughly documented in medical literature, the occurrence of cataracts as a side effect is exceedingly rare. There is evidence of cataract formation with long-term use of VPA in a few studies. Recognizing this potential adverse effect is crucial. It is important to recommend that patients undergo regular eye examinations if they experience any visual disturbances or as a preventative measure to ensure effective management. This case report examines the unusual occurrence of cataract development associated with valproate use.

19.
IBRO Neurosci Rep ; 17: 83-86, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-39026897

RESUMO

Status epilepticus (SE) is a life-threatening neurological condition with significant mortality. Rapid management is essential to minimize the mortality and disability of SE. Two recent trials provided evidence to guide SE management in early and established stages. The Rapid Anticonvulsant Medication Prior To Arrival Trial (RAMPART, 2011) showed that intramuscular midazolam is a better alternative for early convulsive SE in prehospital settings. The Established Status Epilepticus Treatment Trial (ESETT, 2020) supported the use of sodium valproate and levetiracetam as second-line treatment for its efficacy and shorter administration time. However, there are challenges to revising the status epilepticus management in resource-limited settings, in pre-hospital, first- and second-line treatment, as well as management of refractory and super-refractory SE. These challenges included restrictions or lack of training in the administration of benzodiazepine in the prehospital setting, limited availability and accessibility of newer antiseizure medications (ASMs) in emergency departments and smaller hospitals, and low clinicians' awareness of the latest evidence. A collaborative effort to educate, improve awareness, and make certain ASMs more readily available is recommended to achieve a better clinical outcome in SE.

20.
Drug Chem Toxicol ; : 1-10, 2024 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-38984369

RESUMO

Valproic acid is an antiepileptic drug associated with skin-related issues like excessive hair growth, hair loss, and skin rashes. In contrast, Moringa oleifera, rich in nutrients and antioxidants, is gaining popularity worldwide for its medicinal properties. The protective properties of M. oleifera extract against skin-related side effects caused by valproic acid were investigated. Female rats were divided into control groups and experimental groups such as moringa, sodium valproate, and sodium valproate + moringa groups. A 70% ethanolic extract of moringa (0.3 g/kg/day) was given to moringa groups, and a single dose of sodium valproate (0.5 g/kg/day) was given to valproate groups for 15 days. In the skin samples, antioxidant parameters (such as glutathione, glutathione-S-transferase, superoxide dismutase, catalase, and total antioxidant capacity), as well as oxidant parameters representing oxidative stress (i.e. lipid peroxidation, sialic acid, nitric oxide, reactive oxygen species, and total oxidant capacity), were examined. Additionally, boron, hydroxyproline, sodium-potassium ATPase, and tissue factor values were determined. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis was also carried out for protein analysis in the skin samples. The results showed that moringa could increase glutathione, total antioxidant capacity, sodium-potassium ATPase, and boron levels, while decreasing lipid peroxidation, sialic acid, nitric oxide, total oxidant capacity, reactive oxygen species, hydroxyproline, and tissue factor levels. These findings imply that moringa possesses the potential to mitigate dermatological side effects.

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