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Ibrahim IH, Aboregela AM, Gouda RHE, Eid KA. Chronic valproate treatment influences folliculogenesis and reproductive hormones with possible ameliorating role for folic acid in adult albino rats. Acta Histochem 2019; 121:776-783. [PMID: 31307787 DOI: 10.1016/j.acthis.2019.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 07/07/2019] [Accepted: 07/08/2019] [Indexed: 10/26/2022]
Abstract
Sodium Valproate (VPA) is known to have deleterious consequences on ovarian function and folliculogenesis. Folic acid (FA) is associated with the quality of many parameters in folliculogenesis. Therefore, we aimed to investigate the effects of chronic Valproate administration on ovarian morphology, folliculogenesis, reproductive hormones, and the possible protective effect of Folic acid supplementation. Forty adult female albino rats were divided into four groups and treated orally for 90 days as follows: Control group received distilled water; FA group received (folic acid 400 μg/day); VPA group received (Na Valproate 200 mg/kg/day) and VPA + FA group received (Na Valproate 200 mg/kg/day + folic acid 400 μg/day). In addition, ovaries were processed for routine histology and immunohistochemistry (TGFβ1 and PCNA) and reproductive hormones levels were measured. Results showed a significant decrease in number of follicles in VPA group, while atretic follicles increased compared with control group (P < 0.001). Interestingly, the number of follicles significantly increased in VPA + FA group compared with VPA group (P < 0.001). Also, number of atretic follicles significantly decreased in the VPA + FA group compared to the VPA group. Histochemistry score decreased for TGFβ1 and PCNA staining in VPA group compared with control group (P < 0.01). Moreover, Valproate demonstrated a significant increase in testosterone levels in VPA group than control group (P < 0.001). However, VPA group demonstrated a significant decrease in levels of estradiol, progesterone, FSH and LH levels compared with control group. These changes were partially improved in VPA + FA group. In conclusion, FA co-treatment can modulate ovarian follicular and hormonal disturbances induced by valproate, which needs further investigations to identify the precise mechanisms.
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Paixão L, Ramos RB, Lavarda A, Morsh DM, Spritzer PM. Animal models of hyperandrogenism and ovarian morphology changes as features of polycystic ovary syndrome: a systematic review. Reprod Biol Endocrinol 2017; 15:12. [PMID: 28183310 PMCID: PMC5301391 DOI: 10.1186/s12958-017-0231-z] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 02/08/2017] [Indexed: 12/26/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder, affecting 9-18% of women in reproductive age that causes hyperandrogenism and infertility due to dysfunctional follicular maturation and anovulation. The etiology of PCOS is still poorly known, and information from experimental animal models may help improve current understanding of the mechanisms of PCOS initiation and development. Therefore, we conducted a systematic review of currently available methods for simulation of PCOS in experimental models, focusing on two main endocrine traits: ovarian morphology changes and circulating levels of sex hormones and gonadotropins.We searched the MEDLINE database for articles in English or Spanish published until October 2016. Of 933 studies identified, 39 were included in the systematic review. One study compared interventions with androgens versus estrogens, 18 used androgen-induced stimulation, 9 used estrogens or drugs with estrogen action, including endocrine disruptors, to induce PCOS-like models, and 12 used miscellaneous interventions. Broad differences were found among the studies concerning hormonal interventions, animal species, and developmental stage at the time of the experiments, and most models resulted in ovarian morphology changes, mainly increases in the number of cystic and antral follicles and decreases in the corpus luteum. Hyperandrogenism was produced by using androgens and other drugs as the stimulatory agent. However, studies using drugs with estrogenic effect did not observe changes in circulating androgens.In conclusion, medium- or long-term testosterone administration in the pre- and postnatal periods performed best for induction of a PCOS-like phenotype, in rhesus macaque and rat models respectively. In rats, postnatal exposure to androgens results in reprogramming of the hypothalamic-pituitary-ovarian-axis. Thus, comparisons between different intervention models may be useful to define the timing of reproductive PCOS phenotypes in experimental animal models.
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Affiliation(s)
- Larissa Paixão
- 0000 0001 0125 3761grid.414449.8Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035 003 Porto Alegre, RS Brazil
- 0000 0001 2200 7498grid.8532.cDepartment of Physiology, Laboratory of Molecular Endocrinology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Ramon B. Ramos
- 0000 0001 0125 3761grid.414449.8Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035 003 Porto Alegre, RS Brazil
| | - Anita Lavarda
- 0000 0001 0125 3761grid.414449.8Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035 003 Porto Alegre, RS Brazil
| | - Debora M. Morsh
- 0000 0001 0125 3761grid.414449.8Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035 003 Porto Alegre, RS Brazil
| | - Poli Mara Spritzer
- 0000 0001 0125 3761grid.414449.8Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, 90035 003 Porto Alegre, RS Brazil
- 0000 0001 2200 7498grid.8532.cDepartment of Physiology, Laboratory of Molecular Endocrinology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Pasquali R, Diamanti-Kandarakis E, Gambineri A. MANAGEMENT OF ENDOCRINE DISEASE: Secondary polycystic ovary syndrome: theoretical and practical aspects. Eur J Endocrinol 2016; 175:R157-69. [PMID: 27170519 DOI: 10.1530/eje-16-0374] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/11/2016] [Indexed: 12/26/2022]
Abstract
PCOS is a clinical heterogeneous entity of female androgen excess diagnosed by exclusion of other disorders responsible for androgen excess. The concept of secondary PCOS implies that there is a primary well-defined cause leading to the PCOS phenotype with underlying androgen overproduction, regardless of the origin. In these cases, we presume the term of 'secondary PCOS' could be used. In all these conditions, the potential complete recovery of the hyperandrogenemic state as well as the remission of the PCOS phenotype should follow the removal of the cause. If accepted, these concepts could help clinicians to perform in-depth investigations of the potential factors or disorders responsible for the development of these specific forms of secondary PCOS. Additionally, this could contribute to develop further research on factors and mechanisms involved in the development of the classic and the nonclassic PCOS phenotypes.
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Affiliation(s)
- Renato Pasquali
- Division of EndocrinologyDepartment of Medical & Surgical Sciences, University Alma Mater Studiorum, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Evanthia Diamanti-Kandarakis
- Department of Endocrinology and Diabetes Center of ExcellenceEUROCLINIC, Medical School University of Athens, Athens, Greece
| | - Alessandra Gambineri
- Division of EndocrinologyDepartment of Medical & Surgical Sciences, University Alma Mater Studiorum, S. Orsola-Malpighi Hospital, Bologna, Italy
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MacDonald JK, Pyle WG, Reitz CJ, Howlett SE. Cardiac contraction, calcium transients, and myofilament calcium sensitivity fluctuate with the estrous cycle in young adult female mice. Am J Physiol Heart Circ Physiol 2014; 306:H938-53. [DOI: 10.1152/ajpheart.00730.2013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
This study established conditions to induce regular estrous cycles in female C57BL/6J mice and investigated the impact of the estrous cycle on contractions, Ca2+ transients, and underlying cardiac excitation-contraction (EC)-coupling mechanisms. Daily vaginal smears from group-housed virgin female mice were stained to distinguish estrous stage (proestrus, estrus, metestrus, diestrus). Ventricular myocytes were isolated from anesthetized mice. Contractions and Ca2+ transients were measured simultaneously (4 Hz, 37°C). Interestingly, mice did not exhibit regular cycles unless they were exposed to male pheromones in bedding added to their cages. Field-stimulated myocytes from mice in estrus had larger contractions (∼2-fold increase), larger Ca2+ transients (∼1.11-fold increase), and longer action potentials (>2-fold increase) compared with other stages. Larger contractions and Ca2+ transients were not observed in estrus myocytes voltage-clamped with shorter action potentials. Voltage-clamp experiments also demonstrated that estrous stage had no effect on Ca2+ current, EC-coupling gain, diastolic Ca2+, sarcoplasmic reticulum (SR) Ca2+ content, or fractional release. Although contractions were largest in estrus, myofilament Ca2+ sensitivity was lowest (EC50 values ∼1.15-fold higher) in conjunction with increased phosphorylation of myosin binding protein C in estrus. Contractions were enhanced in ventricular myocytes from mice in estrus because action potential prolongation increased SR Ca2+ release. These findings demonstrate that cyclical changes in reproductive hormones associated with the estrous cycle can influence myocardial electrical and contractile function and modify Ca2+ homeostasis. However, such changes are unlikely to occur in female mice housed in groups under conventional conditions, since these mice do not exhibit regular estrous cycles.
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Affiliation(s)
| | - W. Glen Pyle
- Cardiovascular Research Group, Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Cristine J. Reitz
- Cardiovascular Research Group, Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Susan E. Howlett
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Medicine (Geriatric Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
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Hu X, Wang J, Dong W, Fang Q, Hu L, Liu C. A meta-analysis of polycystic ovary syndrome in women taking valproate for epilepsy. Epilepsy Res 2011; 97:73-82. [DOI: 10.1016/j.eplepsyres.2011.07.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Revised: 06/14/2011] [Accepted: 07/15/2011] [Indexed: 10/17/2022]
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Fisseha S, Towns R, Harada M, Peegel H, Menon KMJ. Inhibitory effect of valproic acid on ovarian androgen biosynthesis in rat theca-interstitial cells. Endocrine 2010; 37:187-93. [PMID: 20963569 PMCID: PMC2963034 DOI: 10.1007/s12020-009-9287-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Accepted: 11/16/2009] [Indexed: 10/20/2022]
Abstract
The objective of the study was to evaluate the effect of valproic acid (VPA) on ovarian androgen biosynthesis in primary cultures of theca-interstitial (T-I) cells isolated from rat ovaries. Ovarian T-I cells were cultured with VPA in the presence or absence of hCG. VPA did not increase basal or hCG-stimulated androgen synthesis when added to primary cultures of T-I cells. However, the addition of VPA caused a marked concentration-dependent inhibitory effect on hCG-stimulated androstendione synthesis. Treatment of T-I cells with 8-Bromo-cAMP resulted in a marked increase in the production of androstenedione, and VPA inhibited this stimulatory effect, suggesting that the mechanism of VPA's inhibitory effect on androstenedione production occurs at a step after second messenger activation. Treatment of T-I cells with hCG resulted in a significant increase in the mRNA expression of steroidogenic enzymes CYP17A1 and 17β-hydroxysteroid dehydrogenase. Addition of VPA sharply blunted the stimulatory effect of hCG, reducing the mRNA expression of the steroidogenic enzymes to basal levels. In conclusion, VPA exerts an inhibitory effect on hCG-stimulated androgen synthesis in rat T-I cells.
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Affiliation(s)
- Senait Fisseha
- Department of Obstetrics/Gynecology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Roberto Towns
- Department of Obstetrics/Gynecology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Miyuki Harada
- Department of Obstetrics/Gynecology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Helle Peegel
- Department of Obstetrics/Gynecology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - K. M. J. Menon
- Department of Obstetrics/Gynecology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- University of Michigan Medical School, 6428, Medical Science I, 1150 W. Medical Center Drive, Ann Arbor, MI 48109, USA
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Sridhar GR, Nagamani G. Association of Polycystic Ovary Syndrome with Anticonvulsant Use: ACase Report. Metab Syndr Relat Disord 2008; 4:215-7. [PMID: 18370740 DOI: 10.1089/met.2006.4.215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A 20-year-old woman with epilepsy had resolution of features of polycystic ovary syndrome on discontinuing valproic acid; they reappeared with the newer antiepileptic divalproex sodium.
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Affiliation(s)
- G R Sridhar
- Endocrine and Diabetes Centre, Visakhapatnam, India
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Taubøll E, Røste LS, Svalheim S, Gjerstad L. Disorders of reproduction in epilepsy—What can we learn from animal studies? Seizure 2008; 17:120-6. [DOI: 10.1016/j.seizure.2007.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Qiao L, Schaack J, Shao J. Suppression of adiponectin gene expression by histone deacetylase inhibitor valproic acid. Endocrinology 2006; 147:865-74. [PMID: 16282359 DOI: 10.1210/en.2005-1030] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Valproic acid (VPA) has been used for the treatment of epilepsy and bipolar disorders for more than 30 yr. Obesity and insulin resistance are common side effects of VPA treatment. Adiponectin is an adipocyte-derived protein that plays an important role in controlling insulin sensitivity and glucose homeostasis. In this report, we examined the effects of VPA on adiponectin gene expression in C57BL/6J mice and in differentiated 3T3-L1 adipocytes. VPA treatment significantly decreased adiponectin protein and mRNA levels in both mice and 3T3-L1 adipocytes. The adipocyte study showed that VPA inhibited adiponectin gene expression in a dose- and time-dependent manner. Repression of adiponectin expression by VPA occurred at the transcription level and correlated with inhibition of histone deacetylase activity. Therapeutic concentrations of VPA increased overall histone acetylation and increased adiponectin promoter-driven luciferase expression in fibroblasts, but decreased adiponectin promoter activity in differentiated 3T3-L1 adipocytes. VPA treatment decreased adipogenic transcription factor CCAAT/enhancer binding protein-alpha (C/EBPalpha) levels and binding of C/EBPalpha to the adiponectin promoter without altering the levels of peroxisome proliferator-activated receptor-gamma and steroid regulatory element binding protein-1. Furthermore, VPA did not suppress adiponectin gene expression in C/EBPalpha gene-deficient adipocytes that stably expressed exogenous peroxisome proliferator-activated receptor-gamma2. Together, these results demonstrate that histone deacetylase inhibitor VPA suppresses adiponectin gene expression in mature adipocytes. The study also provides evidence that diminished C/EBPalpha protein level and decreased binding at the adiponectin promoter mediate the inhibitory effects of VPA on adiponectin gene transcription.
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Affiliation(s)
- Liping Qiao
- Graduate Center for Nutritional Sciences, University of Kentucky, Lexington, 40536-0200, USA
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Lagace DC, McLeod RS, Nachtigal MW. Valproic acid inhibits leptin secretion and reduces leptin messenger ribonucleic acid levels in adipocytes. Endocrinology 2004; 145:5493-503. [PMID: 15331576 DOI: 10.1210/en.2004-0877] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Treatment of epilepsy or bipolar disorder with valproic acid (VPA) induces weight gain and increased serum levels for the satiety hormone, leptin, through an unidentified mechanism. In this study we tested the effects of VPA, a short-chain branched fatty acid (C8:0), on leptin biology and fatty acid metabolism in 3T3-L1 adipocytes. VPA significantly reduced leptin secretion in a dose-dependent manner. Because fatty acid accumulation has been hypothesized to block leptin secretion, we tested the effect of VPA on fatty acid metabolism. Using 14C-radiolabeled VPA, we found that the 14C was mainly incorporated into triacylglycerol. VPA did not alter lipogenesis from acetate, nor did it change the amount of intracellular free fatty acids available for triacylglycerol synthesis. Decreased leptin secretion was accompanied by a reduction in leptin mRNA, even though VPA treatment did not alter the protein levels for known transcription factors affecting leptin transcription including: CCAAT/enhancer binding protein-alpha, peroxisome proliferator-activated receptor-gamma, or steroid regulatory element binding protein 1a. VPA altered levels of leptin mRNA independent of de novo protein synthesis without affecting leptin mRNA degradation. This report demonstrates that VPA decreases leptin secretion and mRNA levels in adipocytes in vitro, suggesting that VPA therapy may be associated with altered leptin homeostasis contributing to weight gain in vivo.
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Affiliation(s)
- Diane C Lagace
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
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Lagace DC, Nachtigal MW. Inhibition of histone deacetylase activity by valproic acid blocks adipogenesis. J Biol Chem 2004; 279:18851-60. [PMID: 14985358 DOI: 10.1074/jbc.m312795200] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Adipogenesis is dependent on the sequential activation of transcription factors including the CCAAT/enhancer-binding proteins (C/EBP), peroxisome proliferator-activated receptor gamma (PPARgamma), and steroid regulatory element-binding protein (SREBP). We show that the mood stabilizing drug valproic acid (VPA; 0.5-2 mm) inhibits mouse 3T3 L1 and human preadipocyte differentiation, likely through its histone deacetylase (HDAC) inhibitory properties. The HDAC inhibitor trichostatin A (TSA) also inhibited adipogenesis, whereas the VPA analog valpromide, which does not possess HDAC inhibitory effects, did not prevent adipogenesis. Acute or chronic VPA treatment inhibited differentiation yet did not affect mitotic clonal expansion. VPA (1 mm) inhibited PPARgamma induced differentiation but does not activate a PPARgamma reporter gene, suggesting that it is not a PPARgamma ligand. VPA or TSA treatment reduced mRNA and protein levels of PPARgamma and SREBP1a. TSA reduced C/EBPalpha mRNA and protein levels, whereas VPA only produced a decrease in C/EBPalpha protein expression. Overall our results highlight a role for HDAC activity in adipogenesis that can be blocked by treatment with VPA.
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Affiliation(s)
- Diane C Lagace
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 1X5, Canada
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