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Nirmal D, Abdul S, Jaiswal P, Naunihal Singh S, Avaragollapuravarga Mathada A, Nagaraj P. Effect of duration of sodium valproate therapy on bone mineral density and vitamin D levels. Epilepsy Behav 2024; 153:109733. [PMID: 38447300 DOI: 10.1016/j.yebeh.2024.109733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/08/2024]
Abstract
OBJECTIVE This study aimed to evaluate the impact of prolonged sodium valproate use on bone mineral density (BMD) and Vitamin D levels in pediatric epilepsy patients. METHODS In a cross-sectional study conducted at the Epilepsy Clinic of Niloufer Hospital, Hyderabad, India, 50 pediatric patients (aged 4-10 years) were recruited. The cohort comprised 30 epilepsy patients on sodium valproate treatment (cases) and 20 healthy siblings without epilepsy or valproate use (controls). BMD was assessed using dual-energy X-ray absorptiometry to measure height-adjusted total body less head Z-scores (TBLH Z-scores), and serum 25-hydroxyvitamin D levels were measured. Statistical analysis included independent samples t-tests, Mann-Whitney U tests, and Pearson correlation, with a preliminary power analysis ensuring adequate sample size. RESULTS Cases exhibited significantly lower BMD TBLH Z-scores (Mean = -1.543) compared to controls (Mean = 0.515, p <.001) and reduced Vitamin D levels (Mean = 9.17 for cases vs. 27.80 for controls, p <.001). A negative correlation was observed between the duration of sodium valproate use and both BMD Z-scores (r = -0.626, p <.001) and Vitamin D levels (r = -0.707, p <.001). CONCLUSIONS The findings suggest a significant negative impact of prolonged sodium valproate use on both bone density and Vitamin D levels in pediatric patients. These results underscore the importance of monitoring and managing bone health in children receiving long-term sodium valproate therapy.
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Affiliation(s)
- Dinesh Nirmal
- Niloufer Hospital for Women and Children, Hyderabad, India.
| | - Samee Abdul
- Niloufer Hospital for Women and Children, Hyderabad, India
| | | | | | | | - Preeti Nagaraj
- Niloufer Hospital for Women and Children, Hyderabad, India
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Biondo-Simões MDELP, Dall'antonia MO, Goehr MP, Biondo-Simões R, Ioshii SO, Robes RR. Valproic acid and bladder healing: an experimental study in rats. Rev Col Bras Cir 2022; 49:e20223399. [PMID: 36449944 PMCID: PMC10578821 DOI: 10.1590/0100-6991e-20223399-en] [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: 06/20/2022] [Accepted: 08/10/2022] [Indexed: 12/23/2022] Open
Abstract
PURPOSE to recognize the effects of valproic acid (VPA), an epigenetic drug, on the bladder healing process, in rats. METHOD twenty male Wistar rats were divided in two groups: experimental (A), treated with VPA (150mg/Kg/day), and control (B) with 0.9% sodium chloridrate. Healing was analyzed on the third and seventh days, evaluating the inflammatory reaction, collagen synthesis and angiogenesis. RESULTS inflammatory reaction on the third day was minimal and acute in both groups. On the seventh day, it was subacute in both groups, moderate intensity in group A and minimal in group B (p=0.0476). Collagen III intensity, marked by immunohistochemistry, was similar in both groups. Collagen I intensity on the third day was similar in both groups, but on the seventh day it was higher in experimental than control (p=0.0476). Collagen evaluation by picrosiriusred allowed to verify that the presence of collagen III was similar in both groups (p=0.3312) on the third day, and it was higher in control on the seventh day (p=0.0015). Collagen I showed similarity on the third day (p=0.3100), and it was higher in control on the seventh day (p=0.0015). Vessel marked with anti-SMA counting showed fewer vessels on the third (p=0.0034) and seventh day (p=0.0087) in experimental group. The lower intensity of angiogenesis was confirmed with anti-CD34, on the third day (p=0,0006) and on the seventh day (p=0,0072). CONCLUSION VPA determined alterations in the bladder healing process, in rats, with lower collagen density and less angiogenic activity, but without compromising the integrity of the organ.
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Affiliation(s)
| | | | - Matheus Prince Goehr
- - Universidade Federal do Paraná, Técnica Cirúrgica e Cirurgia Experimental - Curitiba - PR - Brasil
| | - Rachel Biondo-Simões
- - Universidade Federal do Paraná, Programa de Pós-graduação em Clínica Cirúrgica - Departamento de Cirurgia - Curitiba - PR - Brasil
| | - Sérgio Ossamu Ioshii
- - Universidade Federal do Paraná, Departamento de Patologia da UFPR - Curitiba - PR - Brasil
| | - Rogério Ribeiro Robes
- - Universidade Federal do Paraná, Técnica Cirúrgica e Cirurgia Experimental - Curitiba - PR - Brasil
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BIONDO-SIMÕES MARIADELOURDESPESSOLE, DALL’ANTONIA MOACIROLIVEIRA, GOEHR MATHEUSPRINCE, BIONDO-SIMÕES RACHEL, IOSHII SÉRGIOOSSAMU, ROBES ROGÉRIORIBEIRO. Ácido valpróico e cicatrização em bexiga: estudo experimental em ratos. Rev Col Bras Cir 2022. [DOI: 10.1590/0100-6991e-20223399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
RESUMO Objetivo: reconhecer os efeitos do ácido valpróico (VPA), uma droga epigenética, no processo de cicatrização da bexiga, em ratos. Método: vinte ratos Wistar machos foram divididos em dois grupos: experimental (A), utilizando VPA (150mg/Kg/dia), e controle (B), tratados com cloreto de sódio 0,9% por gavagem. A cicatrização da bexiga foi analisada no terceiro e sétimo dia, estudando-se a reação inflamatória, síntese de colágeno, reepitelização e angiogênese. Resultados: a reação inflamatória no terceiro dia foi mínima e aguda em ambos os grupos. No sétimo dia, foi subaguda em ambos os grupos com intensidade moderada no grupo A e mínima no grupo B (p=0,0476). A intensidade do colágeno III, marcada pela imuno-histoquímica, foi semelhante nos dois grupos, nos dois tempos estudados. A intensidade de colágeno I no terceiro dia foi semelhante nos dois grupos, e maior no sétimo dia no grupo experimental (p=0,0476). A avaliação do colágeno pelo picrosiriusred mostrou que a presença de colágeno III foi semelhante em ambos os grupos (p=0,3312) no terceiro dia, e maior no controle no sétimo dia (p=0,0015). O colágeno I foi semelhante no terceiro dia (p=0,3100), e maior no controle no sétimo dia (p=0,0015). A contagem de vasos marcados pelo anti-SMA mostrou menos vasos no terceiro (p=0,0034) e sétimo dia (p=0,0087) no grupo experimental, confirmado pelo anti-CD34, no terceiro (p=00006) e no sétimo dia (p=0,0072). Conclusão: o VPA determinou alterações no processo de cicatrização da bexiga, em ratos, com menor densidade de colágeno e menor atividade angiogênica, mas sem comprometer a integridade do órgão.
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Gebuijs IGE, Metz JR, Zethof J, Carels CEL, Wagener FADTG, Von den Hoff JW. The anti-epileptic drug valproic acid causes malformations in the developing craniofacial skeleton of zebrafish larvae. Mech Dev 2020; 163:103632. [PMID: 32668265 DOI: 10.1016/j.mod.2020.103632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/22/2020] [Accepted: 07/07/2020] [Indexed: 12/17/2022]
Abstract
Valproic acid (VPA) is an anti-epileptic drug known to cause congenital craniofacial abnormalities, including orofacial clefts (OFC). The exact mechanisms by which VPA leads to craniofacial skeletal malformations are poorly understood. In this study, we investigated the effects of VPA on cartilage and bone formation in the zebrafish larval head during 1-13 hpf (early) and 25-37 hpf (late) development in which cranial neural crest cells (CNCCs) arise and then proliferate and differentiate, respectively. Double-staining for cartilage and bone at 5 dpf revealed that VPA reduced cartilage and bone formation in a dose-dependent manner after both early or late exposure. Several different CNCC-derived cartilage and bone elements were affected in both groups. In the early group (100 μM VPA), the posterior head length and the ethmoid plate were reduced in length (both p < 0.01), while mineralization of 4 out of 9 bone elements was often lacking (all p < 0.01). In the late group (100 μM VPA), also the posterior head length was reduced as well as the length of the ceratohyals (both p < 0.01). Similar to early exposure, mineralization of 3 out of 9 bone elements was often lacking (all p < 0.01). These results indicate that both CNCC formation (early) and differentiation (late) are hampered by VPA treatment, of which the consequences for bone and cartilage formation are persistent at 5 dpf. Indeed, we also found that the expression of several genes related to cartilage and bone was upregulated at 5 dpf. These data indicate a compensatory reaction to the lack of cartilage and bone. Altogether, VPA seems to induce craniofacial malformations via disturbed CNCC function leading to defects in cartilage and bone formation.
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Affiliation(s)
- I G E Gebuijs
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands; Department of Animal Ecology and Physiology, Radboud University, Nijmegen, the Netherlands
| | - J R Metz
- Department of Animal Ecology and Physiology, Radboud University, Nijmegen, the Netherlands
| | - J Zethof
- Department of Animal Ecology and Physiology, Radboud University, Nijmegen, the Netherlands
| | - C E L Carels
- Department of Oral Health Sciences, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - F A D T G Wagener
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands
| | - J W Von den Hoff
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands.
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Secreted Protein Acidic and Rich in Cysteine: Metabolic and Homeostatic Properties beyond the Extracellular Matrix Structure. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10072388] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An extracellular matrix (ECM) is a network of numerous macromolecules that represents the cellular structural support involved in key biofunctions such as signal transduction and cellular adhesion. In addition, ECM-associated proteins interact with ECM and with other endogenous structures and molecules to control cellular growth, structural modifications, cellular migration, etc. Among the ECM-associated proteins, secreted protein acidic and rich in cysteine (SPARC) is a protein that is known to be expressed when tissues change. Herein, we put a spotlight on selected, metabolic and homeostatic properties beyond the known properties of ECM and SPARC. Importantly, the synchronization of the metabolic and structural implications of SPARC and the ECM would indicate an adaptation of the metabolism to meet the needs of the changes that the tissues undergo. Highlighting such properties would have important applications in diverse fields that include therapeutics, metabolics, and pathogenesis.
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Effects of carbamazepine, eslicarbazepine, valproic acid and levetiracetam on bone microarchitecture in rats. Pharmacol Rep 2020; 72:1323-1333. [DOI: 10.1007/s43440-020-00087-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/24/2020] [Accepted: 03/09/2020] [Indexed: 12/28/2022]
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Zhong R, Chen Q, Zhang X, Li M, Liang J, Lin W. Bone Mineral Density Loss in People With Epilepsy Taking Valproate as a Monotherapy: A Systematic Review and Meta-Analysis. Front Neurol 2019; 10:1171. [PMID: 31787923 PMCID: PMC6856144 DOI: 10.3389/fneur.2019.01171] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/21/2019] [Indexed: 01/11/2023] Open
Abstract
Objective: Data on changes in bone mineral density (BMD) from valproate (VPA) therapy are ambiguous and conflicting. Thus, the aim of this study was to systematically review the existing data and carry out a meta-analysis to investigate the effect of VPA as a monotherapy on BMD in people with epilepsy (PWE). Methods: We systematically searched PubMed, EMBASE, and MEDLINE for eligible studies. We calculated the standardized mean difference (SMD) with 95% confidence interval (CI) to investigate the statistical power of the association between VPA treatment and BMD. Results: Nineteen studies were included in this systematic review and meta-analysis. We found that BMD was lower in the VPA group than in the control group (SMD: −0.44; 95% CI: −0.65 to −0.22). A significant association was found in adult patients (SMD: −0.57; 95% CI: −0.88 to −0.26; I2 = 69.8%) and pediatric patients (SMD: −0.32; 95% CI: −0.60 to −0.03; I2 = 67.8%) by subgroup analysis. This study indicated that BMD was significantly lower in patients treated for more than 36 months than in controls (SMD: −0.52; 95% CI: −0.76 to −0.27; I2 = 61.8%). However, a significant difference was not found between patients who were treated for less than 36 months and controls (SMD: −0.36; 95% CI: −0.72 to 0.01; I2 = 74.8%). Conclusion and significance: The present study provided evidence that VPA treatment was significantly associated with BMD loss in PWE. Thus, for patients at a high risk of osteoporosis and fracture, especially for patients who need long-term treatment, VPA may not be a good choice.
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Affiliation(s)
- Rui Zhong
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Qingling Chen
- Department of Hepatology, The First Hospital of Jilin University, Changchun, China
| | - Xinyue Zhang
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Mengmeng Li
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Jianmin Liang
- Department of Pediatric Neurology, The First Hospital of Jilin University, Changchun, China
| | - Weihong Lin
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
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Rocha S, Ferraz R, Prudêncio C, Fernandes MH, Costa-Rodrigues J. Differential effects of antiepileptic drugs on human bone cells. J Cell Physiol 2019; 234:19691-19701. [PMID: 30941778 DOI: 10.1002/jcp.28569] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 01/10/2023]
Abstract
Antiepileptic drugs (AED) have been associated to in vivo deleterious consequences in bone tissue. The present work aimed to characterize the cellular and molecular effects of five different AED on human osteoclastogenesis and osteblastogenesis. It was observed that the different drugs had the ability to differentially modulate both processes, in a way dependent on the identity and dose of the AED. Shortly, valproic acid stimulated either osteoclastogenesis and osteoblastogenesis, whereas carbamazepine, gabapentin, and lamotrigine revealed an opposite behavior; topiramate elicited a decrease of osteoclast development and an increase in osteoblast differentiation. This is the first report describing the direct effects of different AED on human primary bone cells, which is a very important issue, because these drugs are usually consumed in long-term therapeutics, with acknowledged in vivo effects in bone tissue.
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Affiliation(s)
- Sara Rocha
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, U. Porto, Portugal.,Ciências Químicas e das Biomoléculas (CQB) e Centro de Investigação em Saúde e Ambiente (CISA), Escola Superior de Saúde do Instituto Politécnico do Porto, Portugal
| | - Ricardo Ferraz
- Ciências Químicas e das Biomoléculas (CQB) e Centro de Investigação em Saúde e Ambiente (CISA), Escola Superior de Saúde do Instituto Politécnico do Porto, Portugal.,REQUIMTE/LAQV, U. Porto, Portugal
| | - Cristina Prudêncio
- Ciências Químicas e das Biomoléculas (CQB) e Centro de Investigação em Saúde e Ambiente (CISA), Escola Superior de Saúde do Instituto Politécnico do Porto, Portugal.,i3S, Instituto de Inovação e Investigação em Saúde, Universidade do Porto, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, U. Porto, Portugal.,REQUIMTE/LAQV, U. Porto, Portugal
| | - João Costa-Rodrigues
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, U. Porto, Portugal.,ESS - Escola Superior de Saúde, P. Porto, Portugal.,Instituto Politécnico de Viana do Castelo, Escola Superior de Saúde, Portugal.,i3S, Instituto de Inovação e Investigação em Saúde, Universidade do Porto, Portugal
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Wu CF. [Effect of sodium valproate therapy on bone metabolism]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2017; 19:965-967. [PMID: 28899464 PMCID: PMC7403060 DOI: 10.7499/j.issn.1008-8830.2017.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 08/01/2017] [Indexed: 06/07/2023]
Affiliation(s)
- Chun-Feng Wu
- Department of Pediatric Neurology, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
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Pitetzis DA, Spilioti MG, Yovos JG, Yavropoulou MP. The effect of VPA on bone: From clinical studies to cell cultures—The molecular mechanisms revisited. Seizure 2017; 48:36-43. [DOI: 10.1016/j.seizure.2017.03.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 03/19/2017] [Accepted: 03/21/2017] [Indexed: 01/10/2023] Open
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Sittner D, Huhse B, Steinfath M, Luch A, Seiler AE. Osteogenic Differentiation of Human Embryonic Stem Cell-Derived Mesenchymal Progenitor Cells as a Model for Assessing Developmental Bone ToxicityIn Vitro. ACTA ACUST UNITED AC 2016. [DOI: 10.1089/aivt.2016.0013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Dana Sittner
- Department of Experimental Toxicology and ZEBET, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Bettina Huhse
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Matthias Steinfath
- Department of Experimental Toxicology and ZEBET, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Andreas Luch
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Andrea E.M. Seiler
- Department of Experimental Toxicology and ZEBET, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
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Anti-epileptic drugs and bone loss: Phenytoin reduces pro-collagen I and alters the electrophoretic mobility of osteonectin in cultured bone cells. Epilepsy Res 2016; 122:97-101. [DOI: 10.1016/j.eplepsyres.2016.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 02/09/2016] [Accepted: 03/10/2016] [Indexed: 11/23/2022]
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Villegas-Martínez I, de-Miguel-Elízaga I, Carrasco-Torres R, Marras C, Canteras-Jordana M, Yedra-Guzmán MJ, Martínez-Villanueva M, Tortosa-Conesa D, Martín-Fernández J. The COL1A1 SP1 polymorphism is associated with lower bone mineral density in patients treated with valproic acid. Pharmacogenet Genomics 2016; 26:126-32. [DOI: 10.1097/fpc.0000000000000199] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hamed SA. Markers of bone turnover in patients with epilepsy and their relationship to management of bone diseases induced by antiepileptic drugs. Expert Rev Clin Pharmacol 2015; 9:267-86. [DOI: 10.1586/17512433.2016.1123617] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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15
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Markers of bone turnover in patients with epilepsy and their relationship to management of bone diseases induced by antiepileptic drugs. Expert Rev Clin Pharmacol 2015. [PMID: 26589104 DOI: org/10.1586/17512433.2016.1123617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Data from cross-sectional and prospective studies revealed that patients with epilepsy and on long-term treatment with antiepileptic drugs (AEDs) are at increased risk for metabolic bone diseases. Bone diseases were reported in about 50% of patients on AEDs. Low bone mineral density, osteopenia/osteoporosis, osteomalacia, rickets, altered concentration of bone turnover markers and fractures were reported with phenobarbital, phenytoin, carbamazepine, valproate, oxcarbazepine and lamotrigine. The mechanisms for AEDs-induced bone diseases are heterogeneous and include hypovitaminosis D, hypocalcemia and direct acceleration of bone loss and/or reduction of bone formation. This article reviews the evidence, predictors and mechanisms of AEDs-induced bone abnormalities and its clinical implications. For patients on AEDs, regular monitoring of bone health is recommended. Prophylactic administration of calcium and vitamin D is recommended for all patients. Treatment doses of calcium and vitamin D and even anti-resorptive drug therapy are reserved for patients at high risk of pathological fracture.
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Bradley EW, Carpio LR, van Wijnen AJ, McGee-Lawrence ME, Westendorf JJ. Histone Deacetylases in Bone Development and Skeletal Disorders. Physiol Rev 2015; 95:1359-81. [PMID: 26378079 PMCID: PMC4600951 DOI: 10.1152/physrev.00004.2015] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Histone deacetylases (Hdacs) are conserved enzymes that remove acetyl groups from lysine side chains in histones and other proteins. Eleven of the 18 Hdacs encoded by the human and mouse genomes depend on Zn(2+) for enzymatic activity, while the other 7, the sirtuins (Sirts), require NAD2(+). Collectively, Hdacs and Sirts regulate numerous cellular and mitochondrial processes including gene transcription, DNA repair, protein stability, cytoskeletal dynamics, and signaling pathways to affect both development and aging. Of clinical relevance, Hdacs inhibitors are United States Food and Drug Administration-approved cancer therapeutics and are candidate therapies for other common diseases including arthritis, diabetes, epilepsy, heart disease, HIV infection, neurodegeneration, and numerous aging-related disorders. Hdacs and Sirts influence skeletal development, maintenance of mineral density and bone strength by affecting intramembranous and endochondral ossification, as well as bone resorption. With few exceptions, inhibition of Hdac or Sirt activity though either loss-of-function mutations or prolonged chemical inhibition has negative and/or toxic effects on skeletal development and bone mineral density. Specifically, Hdac/Sirt suppression causes abnormalities in physiological development such as craniofacial dimorphisms, short stature, and bone fragility that are associated with several human syndromes or diseases. In contrast, activation of Sirts may protect the skeleton from aging and immobilization-related bone loss. This knowledge may prolong healthspan and prevent adverse events caused by epigenetic therapies that are entering the clinical realm at an unprecedented rate. In this review, we summarize the general properties of Hdacs/Sirts and the research that has revealed their essential functions in bone forming cells (e.g., osteoblasts and chondrocytes) and bone resorbing osteoclasts. Finally, we offer predictions on future research in this area and the utility of this knowledge for orthopedic applications and bone tissue engineering.
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Affiliation(s)
- Elizabeth W Bradley
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Lomeli R Carpio
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Andre J van Wijnen
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Meghan E McGee-Lawrence
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Jennifer J Westendorf
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
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Miziak B, Błaszczyk B, Chrościńska-Krawczyk M, Danilkiewicz G, Jagiełło-Wójtowicz E, Czuczwar SJ. The problem of osteoporosis in epileptic patients taking antiepileptic drugs. Expert Opin Drug Saf 2014; 13:935-46. [PMID: 24821596 DOI: 10.1517/14740338.2014.919255] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Epilepsy is a common neurological disorder associated with recurrent seizures. Therapy with antiepileptic drugs (AEDs) helps achieve seizure remission in approximately 70% of epileptic patients. Treatment with AEDs is frequently lifelong and there are reports suggesting its negative influence on bone health. This is especially important in terms of general occurrence of osteoporosis, affecting over 50 million people worldwide. AREAS COVERED This study refers to two main groups of AEDs: hepatic enzyme inducers (carbamazepine, oxcarbazepine, phenobarbital, phenytoin, primidone and topiramate) and non-inducers (clobazam, clonazepam, ethosuximide, gabapentin, lacosamide, lamotrigine, levetiracetam, pregabalin, tiagabine, valproate, vigabatrin and zonisamide). Some reports indicate that enzyme inducers may exert a more negative influence on bone mineral density (BMD) compared to non-inducers. Bone problems may appear in both sexes during AED therapy, although women are additionally burdened with postmenopausal osteoporosis. Supplementation of vitamin D and calcium in patients on AEDs is recommended. EXPERT OPINION Apart from enzyme inducers, valproate (an even enzyme inhibitor) may also negatively affect BMD. However, the untoward effects of AEDs may depend upon their doses and duration of treatment. Although the problem of supplementation of vitamin D and calcium in epileptic patients on AEDs is controversial, there are recommendations to do so.
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Affiliation(s)
- Barbara Miziak
- Medical University, Department of Pathophysiology , Jaczewskiego 8, PL 20-090 Lublin , Poland
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