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Empfehlungen zu Endokrinologischen Aspekten bei Jugendlichen mit Epilepsie

Recommendations for endocrinological aspects in adolescents with epilepsy

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Zusammenfassung

Während der Phase von Wachstum und Pubertät begleiten profunde Veränderungen metabolischer/endokrinologischer Kompartimente die Reifung verschiedenster Hormonsysteme (Geschlechts-, Schilddrüsenhormone, Knochengesundheit, Fett- und Glukosestoffwechsel). Einerseits kann die Erkrankung Epilepsie per se Auswirkungen auf diverse endokrine Systeme haben, andererseits ist bekannt, dass antikonvulsive Medikamente neuro-endokrine Veränderungen vor allem im Bereich der Geschlechtshormone, des Glukose- und Fettstoffwechsels aber auch im Bereich der Knochengesundheit hervorrufen können. Veränderungen von Schilddrüsenhormonen sind derzeit in ihrer klinischen Relevanz noch strittig, regelmäßige Laborkontrollen insbesondere bei Therapie mit Valproinsäure, Carbamazepin und Oxcarbazepin sind empfehlenswert. Zum Ausschluss von Veränderungen der Knochendichte erscheint eine genaue Risikostratifizierung und regelhafte Bestimmung der Vitamin-D-Spiegel sinnvoll. Die Kontrazeption bei Jugendlichen mit Epilepsie sollte entweder durch ein Pillenpräparat mit ausreichend hohem Östrogengehalt und dem Verzicht auf ein pillenfreies Intervall in Kombination mit zusätzlichem Schutz (Kondom) oder alternativ durch eine Hormonspirale erfolgen. Die Empfehlungen bei Eintritt einer Schwangerschaft beinhalten die genaue Instruktion in Bezug auf Anfallshygiene sowie engmaschige Spiegelkontrollen. Bei Einnahme von Lamotrigin (LTG) in Kombination mit oralen Kontrazeptiva (OCs) sind engmaschige Spiegelkontrollen mit gegebenenfalls Dosisanpassungen notwendig, midzyklische Blutungen können auf ein Versagen der kontrazeptiven Sicherheit hinweisend sein. Die Auswirkungen von Sport und Fitness auf die Epilepsie sind insgesamt, eine stabile Anfallssituation vorausgesetzt, als durchwegs positiv zu bewerten und gehen gerade im Kindes- und Jugendalter weit über ein reines Lifestyle-Thema hinaus. Insgesamt erscheint gerade deshalb bei jungen Frauen mit Epilepsie ein interdisziplinärer Ansatz (Gynäkologie, Endokrinologie, Neuropädiatrie) wünschenswert und notwendig.

Abstract

During growth and puberty profound changes in metabolic/endocrine compartments are paralleled by the maturation of various hormone systems (e. g. sex-steroid axis, bone health, lipid and glucose homeostasis). On the one hand, things often change with epilepsy and the disease per se might influence enzyme systems. On the other hand, antiepileptic drugs (AED) are well known to elicit diverse neuroendocrine changes. Data concerning the thyroid axis are far from conclusive but regular measurement of serum hormones is recommended. Monitoring of bone health in children and adolescents with epilepsy comprises a thorough evaluation of the risk profile and periodic determination of vitamin D concentrations. To achieve maximum safety, the use of an oral contraceptive containing a progestin dose above that needed to inhibit ovulation without a pill-free interval (a so-called “long cycle”) is suggested. Furthermore, the use of additional barrier methods or – alternatively – classic or levonorgestrel-releasing intrauterine devices should be taken into consideration. In the case of pregnancy, extensive instruction concerning sleep and compliance, as well as frequent determination of AED serum levels are necessary. When lamotrigine is combined with an oral contraceptive, physicians should be aware of decreasing lamotrigine concentrations, whereas mid-cycle bleedings might point towards loss of contraceptive safety. To sum up, a multidisciplinary approach is necessary to monitor possible neuro-endocrine alterations that warrant further examination and treatment, especially in adolescent girls and boys.

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Literatur

  1. Baumgartner C (2001) Handbuch der Epilepsien. Klinik, Diagnostik, Therapie und psychosoziale Aspekte. Springer Verlag, Wien

    Google Scholar 

  2. Luef G, Rauchenzauner M (2008) Epilepsies in girls and women. Oxford: MEDICINAE

    Google Scholar 

  3. Cansu A, Serdaroglu A, Camurdan O, Hirfanoglu T, Bideci A, Gucuyener K (2006) The evaluation of thyroid functions, thyroid antibodies, and thyroid volumes in children with epilepsy during short-term administration of oxcarbazepine and valproate. Epilepsia 47:1855–1859

    Article  CAS  PubMed  Google Scholar 

  4. Mikati MA, Tarabay H, Khalil A, Rahi AC, El Banna D, Najjar S (2007) Risk factors for development of subclinical hypothyroidism during valproic acid therapy. J Pediatr 151:178–181

    Article  CAS  PubMed  Google Scholar 

  5. Vainionpaa LK, Mikkonen K, Rattya J, Knip M, Pakarinen AJ, Myllyla VV, Isojarvi JI (2004) Thyroid function in girls with epilepsy with carbamazepine, oxcarbazepine, or valproate monotherapy and after withdrawal of medication. Epilepsia 45:197–203

    Article  CAS  PubMed  Google Scholar 

  6. Verrotti A, Laus M, Scardapane A, Franzoni E, Chiarelli F (2009) Thyroid hormones in children with epilepsy during long-term administration of carbamazepine and valproate. Eur J Endocrinol 160:81–86

    Article  CAS  PubMed  Google Scholar 

  7. Souverein PC, Webb DJ, Petri H, Weil J, Van Staa TP, Egberts T (2005) Incidence of fractures among epilepsy patients: a population-based retrospective cohort study in the General Practice Research Database. Epilepsia 46:304–310

    Article  PubMed  Google Scholar 

  8. Rauchenzauner M, Griesmacher A, Tatarczyk T, Haberlandt E, Falkensammer G, Luef G, Zimmerhackl LB, Högler W (2010) Chronic antiepileptic monotherapy, bone metabolism and body composition in non-institutionalized children. Dev Med Child Neurol 52:283–288

  9. Farhat G, Yamout B, Mikati MA, Demirjian S, Sawaya R, El-Hajj Fuleihan G (2002) Effect of antiepileptic drugs on bone density in ambulatory patients. Neurology 58:1348–1353

    Article  CAS  PubMed  Google Scholar 

  10. Pack A (2008) Bone health in people with epilepsy: is it impaired and what are the risk factors? Seizure 17:181–186

    Article  PubMed  Google Scholar 

  11. Pack AM, Morrell MJ, Randall A, McMahon DJ, Shane E (2008) Bone health in young women with epilepsy after one year of antiepileptic drug monotherapy. Neurology 70:1586–1593

    Article  PubMed Central  CAS  PubMed  Google Scholar 

  12. Pack AM, Walczak TS (2008) Bone health in women with epilepsy: clinical features and potential mechanisms. Int Rev Neurobiol 83:305–328

    Article  PubMed  Google Scholar 

  13. Verrotti A, Greco R, Morgese G, Chiarelli F (2000) Increased bone turnover in epileptic patients treated with carbamazepine. Ann Neurol 47:385–388

    Article  CAS  PubMed  Google Scholar 

  14. Rauchenzauner M, Schmid A, Heinz-Erian P, Kapelari K, Falkensammer G, Griesmacher A, Finkenstedt G, Hogler W (2007) Sex- and age-specific reference curves for serum markers of bone turnover in healthy children from 2 months to 18 years. J Clin Endocrinol Metab 92:443–449

    Article  CAS  PubMed  Google Scholar 

  15. Luef G, Rauchenzauner M (2009) Epilepsy and hormones: a critical review. Epilepsy Behav 15:73–77

    Article  PubMed  Google Scholar 

  16. Verrotti A, D’Egidio C, Mohn A, Coppola G, Chiarelli F (2011) Weight gain following treatment with valproic acid: pathogenetic mechanisms and clinical implications. Obes Rev 12:e32–43

    Article  CAS  PubMed  Google Scholar 

  17. Luef GJ, Waldmann M, Sturm W, Naser A, Trinka E, Unterberger I, Bauer G, Lechleitner M (2004) Valproate therapy and nonalcoholic fatty liver disease. Ann Neurol 55:729–732

    Article  CAS  PubMed  Google Scholar 

  18. Ioannides-Demos LL, Proietto J, McNeil JJ (2005) Pharmacotherapy for obesity. Drugs 65:1391–1418

    Article  CAS  PubMed  Google Scholar 

  19. Picard F, Deshaies Y, Lalonde J, Samson P, Richard D (2000) Topiramate reduces energy and fat gains in lean (Fa/?) and obese (fa/fa) Zucker rats. Obes Res 8:656–663

    Article  CAS  PubMed  Google Scholar 

  20. Rauchenzauner M, Laimer M, Luef G, Kaser S, Engl J, Tatarczyk T, Ciardi C, Tschoner A, Lechleitner M, Patsch J, Ebenbichler CF (2008) Adiponectin receptor R1 is upregulated by valproic acid but not by topiramate in human hepatoma cell line, HepG2. Seizure 17:723–726

  21. Arida RM, Cavalheiro EA, da Silva AC, Scorza FA (2008) Physical activity and epilepsy: proven and predicted benefits. Sports Med 38:607–615

    Article  PubMed  Google Scholar 

  22. Denio LS, Drake ME Jr, Pakalnis A (1989) The effect of exercise on seizure frequency. J Med 20:171–176

  23. Steinhoff BJ, Neususs K, Thegeder H, Reimers CD (1996) Leisure time activity and physical fitness in patients with epilepsy. Epilepsia 37:1221–1227

    Article  CAS  PubMed  Google Scholar 

  24. Arida RM, Sanabria ER, da Silva AC, Faria LC, Scorza FA, Cavalheiro EA (2004) Physical training reverts hippocampal electrophysiological changes in rats submitted to the pilocarpine model of epilepsy. Physiol Behav 83:165–171

    Article  CAS  PubMed  Google Scholar 

  25. Arida RM, Scorza FA, dos Santos NF, Peres CA, Cavalheiro EA (1999) Effect of physical exercise on seizure occurrence in a model of temporal lobe epilepsy in rats. Epilepsy Res 37:45–52

    Article  CAS  PubMed  Google Scholar 

  26. Hagn C, Walch R, Baumann M, Haberlandt E, Frühwirth M, Rostasy K, Rauchenzauner M (2014) Quality of life and physical fitness in children and adolescents with epilepsy results from the EpiFit study (in preparation)

  27. Rauchenzauner M, Klepper J, Leiendecker B, Luef G, Rostasy K, Ebenbichler C (2008) The ketogenic diet in children with Glut1 deficiency syndrome and epilepsy. J Pediatr 153:716–718

    Article  PubMed  Google Scholar 

  28. Logsdon-Pokorny VK (2000) Epilepsy in adolescents: hormonal considerations. J Pediatr Adolesc Gynecol 13:9–13

    Article  CAS  PubMed  Google Scholar 

  29. Logothetis J, Harner R (1960) Electrocortical activation by estrogens. Arch Neurol 3:290–297

    Article  CAS  PubMed  Google Scholar 

  30. Nicoletti F, Speciale C, Sortino MA, Summa G, Caruso G, Patti F, Canonico PL (1985) Comparative effects of estradiol benzoate, the antiestrogen clomiphene citrate, and the progestin medroxyprogesterone acetate on kainic acid-induced seizures in male and female rats. Epilepsia 26:252–257

    Article  CAS  PubMed  Google Scholar 

  31. Herzog AG, Seibel MM, Schomer DL, Vaitukaitis JL, Geschwind N (1986) Reproductive endocrine disorders in women with partial seizures of temporal lobe origin. Arch Neurol 43:341–346

    Article  CAS  PubMed  Google Scholar 

  32. Isojarvi JI, Laatikainen TJ, Pakarinen AJ, Juntunen KT, Myllyla VV (1995) Menstrual disorders in women with epilepsy receiving carbamazepine. Epilepsia 36:676–681

    Article  CAS  PubMed  Google Scholar 

  33. Isojarvi JI, Pakarinen AJ, Rautio A, Pelkonen O, Myllyla VV (1995) Serum sex hormone levels after replacing carbamazepine with oxcarbazepine. Eur J Clin Pharmacol 47:461–464

    Article  CAS  PubMed  Google Scholar 

  34. Lossius MI, Tauboll E, Mowinckel P, Morkrid L, Gjerstad L (2007) Reversible effects of antiepileptic drugs on reproductive endocrine function in men and women with epilepsy--a prospective randomized double-blind withdrawal study. Epilepsia 48:1875–1882

    Article  PubMed  Google Scholar 

  35. Hogler W, Wudy SA, Luef G, Hartmann MF, Rauchenzauner M (2010) Oxcarbazepine accelerates cortisol elimination via cytochrome P450 3A4 induction. Arch Dis Child 95:1065

    Article  CAS  PubMed  Google Scholar 

  36. Isojarvi JI, Laatikainen TJ, Pakarinen AJ, Juntunen KT, Myllyla VV (1993) Polycystic ovaries and hyperandrogenism in women taking valproate for epilepsy. N Engl J Med 329:1383–1388

    Article  CAS  PubMed  Google Scholar 

  37. Luef G, Abraham I, Trinka E, Alge A, Windisch J, Daxenbichler G, Unterberger I, Seppi K, Lechleitner M, Kramer G, Bauer G (2002) Hyperandrogenism, postprandial hyperinsulinism and the risk of PCOS in a cross sectional study of women with epilepsy treated with valproate. Epilepsy Res 48:91–102

    Article  CAS  PubMed  Google Scholar 

  38. Svalheim S, Tauboll E, Luef G, Lossius A, Rauchenzauner M, Sandvand F, Bertelsen M, Morkrid L, Gjerstad L (2009) Differential effects of levetiracetam, carbamazepine, and lamotrigine on reproductive endocrine function in adults. Epilepsy Behav 16:281–287

    Article  PubMed  Google Scholar 

  39. Svalheim S, Tauboll E, Surdova K, Ormel L, Dahl E, Aleksandersen M, McNeilly A, Gjerstad L, Ropstad E (2008) Long-term levetiracetam treatment affects reproductive endocrine function in female Wistar rats. Seizure 17:203–209

    Article  PubMed  Google Scholar 

  40. Bauer J, Jarre A, Klingmuller D, Elger CE (2000) Polycystic ovary syndrome in patients with focal epilepsy: a study in 93 women. Epilepsy Res 41:163–7

    Article  CAS  PubMed  Google Scholar 

  41. Betts T, Dutton N, Yarrow H (2001) Epilepsy and the ovary (cutting out the hysteria). Seizure 10:220–228

    Article  CAS  PubMed  Google Scholar 

  42. Bilo L, Meo R, Nappi C, Annunziato L, Striano S, Colao AM, Merola B, Buscaino GA (1988) Reproductive endocrine disorders in women with primary generalized epilepsy. Epilepsia 29:612–619

    Article  CAS  PubMed  Google Scholar 

  43. Bilo L, Meo R, Valentino R, Di Carlo C, Striano S, Nappi C (2001) Characterization of reproductive endocrine disorders in women with epilepsy. J Clin Endocrinol Metab 86:2950–2956

    Article  CAS  PubMed  Google Scholar 

  44. de Vries L, Karasik A, Landau Z, Phillip M, Kiviti S, Goldberg-Stern H (2007) Endocrine effects of valproate in adolescent girls with epilepsy. Epilepsia 48:470–477

    Article  PubMed  Google Scholar 

  45. El-Khayat HA, Abd El-Basset FZ, Tomoum HY, Tohamy SM, Zaky AA, Mohamed MS, Hakky SM, El Barbary NS, Nassef NM (2004) Physical growth and endocrinal disorders during pubertal maturation in girls with epilepsy. Epilepsia 45:1106–1115

    Article  PubMed  Google Scholar 

  46. Herzog AG, Seibel MM, Schomer D, Vaitukaitis J, Geschwind N (1984) Temporal lobe epilepsy: an extrahypothalamic pathogenesis for polycystic ovarian syndrome? Neurology 34:1389–1393

    Article  CAS  PubMed  Google Scholar 

  47. Isojarvi JI, Tauboll E, Pakarinen AJ, van Parys J, Rattya J, Harbo HF, Dale PO, Fauser BC, Gjerstad L, Koivunen R, Knip M, Tapanainen JS (2001) Altered ovarian function and cardiovascular risk factors in valproate-treated women. Am J Med 111:290–296

    Article  CAS  PubMed  Google Scholar 

  48. Khatami R, Henrich W, Bauer M (2000) The significance of polycystic ovaries in women with epilepsy under treatment with antiepileptic drugs: preliminary results of a prospective observational study (abstract). Epilepsia 2000:41–143.

  49. Lofgren E, Tapanainen JS, Koivunen R, Pakarinen A, Isojarvi JI (2006) Effects of carbamazepine and oxcarbazepine on the reproductive endocrine function in women with epilepsy. Epilepsia 47:1441–1446

    Article  CAS  PubMed  Google Scholar 

  50. Luef G, Abraham I, Haslinger M, Trinka E, Seppi K, Unterberger I, Alge A, Windisch J, Lechleitner M, Bauer G (2002) Polycystic ovaries, obesity and insulin resistance in women with epilepsy. A comparative study of carbamazepine and valproic acid in 105 women. J Neurol 249:835–841

    Article  CAS  PubMed  Google Scholar 

  51. Mikkonen K, Vainionpaa LK, Pakarinen AJ, Knip M, Jarvela IY, Tapanainen JS, Isojarvi JI (2004) Long-term reproductive endocrine health in young women with epilepsy during puberty. Neurology 62:445–450

    Article  CAS  PubMed  Google Scholar 

  52. Murialdo G, Galimberti CA, Magri F, Sampaolo P, Copello F, Gianelli MV, Gazzerro E, Rollero A, Deagatone C, Manni R, Ferrari E, Polleri A, Tartara A (1997) Menstrual cycle and ovary alterations in women with epilepsy on antiepileptic therapy. J Endocrinol Invest 20:519–526

    Article  CAS  PubMed  Google Scholar 

  53. Murialdo G, Galimberti CA, Gianelli MV, Rollero A, Polleri A, Copello F, Magri F, Ferrari E, Sampaolo P, Manni R, Tartara A (1998) Effects of valproate, phenobarbital, and carbamazepine on sex steroid setup in women with epilepsy. Clin Neuropharmacol 21:52–58

    CAS  PubMed  Google Scholar 

  54. Rauchenzauner M, Roscia S, Prieschl M, Wildt L, Haberlandt E, Baumann M, Rostasy K, Agostinelli S, Pizzolorusso A, Luef G, Verrotti A (2014) Reproductive endocrine health in pubertal females with epilepsy on antiepileptic drugs: time to screen? Neuropediatrics 45:226–233

    Article  CAS  PubMed  Google Scholar 

  55. Duncan S, Read CL, Brodie MJ (1993) How common is catamenial epilepsy? Epilepsia 34:827–831

    Article  CAS  PubMed  Google Scholar 

  56. Foldvary-Schaefer N, Falcone T (2003) Catamenial epilepsy: pathophysiology, diagnosis, and management. Neurology 61:S2–15

    Article  CAS  PubMed  Google Scholar 

  57. Herzog AG, Klein P, Ransil BJ (1997) Three patterns of catamenial epilepsy. Epilepsia 38:1082–1088

    Article  CAS  PubMed  Google Scholar 

  58. Harden CL, Leppik I (2006) Optimizing therapy of seizures in women who use oral contraceptives. Neurology 67:S56–8

    Article  CAS  PubMed  Google Scholar 

  59. Sabers A, Ohman I, Christensen J, Tomson T (2003) Oral contraceptives reduce lamotrigine plasma levels. Neurology 61:570–571

    Article  CAS  PubMed  Google Scholar 

  60. Tomson T, Battino D, Bonizzoni E, Craig J, Lindhout D, Sabers A, Perucca E, Vajda F (2011) Dose-dependent risk of malformations with antiepileptic drugs: an analysis of data from the EURAP epilepsy and pregnancy registry. Lancet Neurol 10:609–617

    Article  CAS  PubMed  Google Scholar 

  61. Borthen I, Eide MG, Daltveit AK, Gilhus NE (2011) Obstetric outcome in women with epilepsy: a hospital-based, retrospective study. Bjog 118:956–965

    Article  CAS  PubMed  Google Scholar 

  62. Chen YH, Chiou HY, Lin HC, Lin HL (2009) Affect of seizures during gestation on pregnancy outcomes in women with epilepsy. Arch Neurol 66:979–984

    Article  PubMed  Google Scholar 

  63. Borthen I, Eide MG, Veiby G, Daltveit AK, Gilhus NE (2009) Complications during pregnancy in women with epilepsy: population-based cohort study. Bjog 116:1736–1742

    Article  CAS  PubMed  Google Scholar 

  64. Veiby G, Daltveit AK, Engelsen BA, Gilhus NE (2009) Pregnancy, delivery, and outcome for the child in maternal epilepsy. Epilepsia 50:2130–2139

    Article  PubMed  Google Scholar 

  65. Viinikainen K, Heinonen S, Eriksson K, Kalviainen R (2006) Community-based, prospective, controlled study of obstetric and neonatal outcome of 179 pregnancies in women with epilepsy. Epilepsia 47:186–192

    Article  PubMed  Google Scholar 

  66. Battino D, Kaneko S, Andermann E, Avanzini G, Canevini MP, Canger R, Croci D, Fumarola C, Guidolin L, Mamoli D, Molteni F, Pardi G, Vignoli A, Fukushima Y, Kan R, Takeda A, Nakane Y, Ogawa Y, Dansky L, Oguni M, Lopez-Ciendas I, Sherwin A, Andermann F, Seni MH, Goto M et al (1999) Intrauterine growth in the offspring of epileptic women: a prospective multicenter study. Epilepsy Res 36:53–60

    Article  CAS  PubMed  Google Scholar 

  67. Gaily EK, Granstrom ML, Hiilesmaa VK, Bardy AH (1990) Head circumference in children of epileptic mothers: contributions of drug exposure and genetic background. Epilepsy Res 5:217–222

    Article  CAS  PubMed  Google Scholar 

  68. Rauchenzauner M, Ehrensberger M, Prieschl M, Kapelari K, Bergmann M, Walser G, Neururer S, Unterberger I, Luef G (2013) Generalized tonic-clonic seizures and antiepileptic drugs during pregnancy--a matter of importance for the baby? J Neurol 260:484–488

    Article  CAS  PubMed  Google Scholar 

  69. Nashef L (1999) From mystery to prevention: sudden unexpected death in epilepsy, time to move on. J Neurol Neurosurg Psychiatry 67:427

    Article  PubMed Central  CAS  PubMed  Google Scholar 

  70. Nashef L, Hindocha N, Makoff A (2007) Risk factors in sudden death in epilepsy (SUDEP): the quest for mechanisms. Epilepsia 48:859–871

    Article  PubMed  Google Scholar 

  71. Brigo F, Igwe SC, Erro R, Bongiovanni LG, Marangi A, Nardone R, Tinazzi M, Trinka E (2015) Postictal serum creatine kinase for the differential diagnosis of epileptic seizures and psychogenic non-epileptic seizures: a systematic review. J Neurol 262:251–257

    Article  CAS  PubMed  Google Scholar 

  72. Rauchenzauner M, Haberlandt E, Foerster S, Ulmer H, Laimer M, Ebenbichler CF, Joannidis M, Zimmerhackl LB, Stein J, Luef G (2007) Brain-type Natriuretic Peptide Secretion Following Febrile and Afebrile Seizures-A New Marker in Childhood Epilepsy? Epilepsia 48:101–106

    CAS  PubMed  Google Scholar 

  73. Baxter GF (2004) The natriuretic peptides. Basic Res Cardiol 99:71–75

    Article  CAS  PubMed  Google Scholar 

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Rauchenzauner, M. Empfehlungen zu Endokrinologischen Aspekten bei Jugendlichen mit Epilepsie. Z. Epileptol. 28, 279–288 (2015). https://doi.org/10.1007/s10309-015-0002-9

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