PMID- 24409198 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20140110 LR - 20211021 IS - 1756-2856 (Print) IS - 1756-2864 (Electronic) IS - 1756-2856 (Linking) VI - 7 IP - 1 DP - 2014 Jan TI - Prophylactic antiepileptic treatment reduces seizure frequency in natalizumab-associated progressive multifocal leukoencephalopathy. PG - 3-6 LID - 10.1177/1756285613503515 [doi] AB - OBJECTIVE: Little is known about seizures in natalizumab-associated progressive multifocal leukoencephalopathy (NAT-PML). METHODS: A review of clinical records of 15 NAT-PML patients with multiple sclerosis (MS) treated at a German university hospital. RESULTS: Some 53% (8/15) of our patients developed seizures with often multiple semiologies (seven grand mal, three simple partial motor and two psychomotor seizures). Series of seizures or status epilepticus occurred in seven of these eight. Seizure onset was on average 61 days after onset of NAT-PML and was associated with immune reconstitution inflammatory syndrome (IRIS) in five of eight patients. After having observed severe seizures during NAT-PML in seven of our first nine patients, we started preventive antiepileptic treatment (PAT) with levetiracetam (1000-1750 mg/day). Patient subgroups analyzed for seizures and PAT did not differ in baseline characteristics. Only one of six patients, who received PAT, had a seizure compared with seven of nine patients without PAT (2-tailed Fisher's exact test, p = 0.04). CONCLUSIONS: Although the small sample size and retrospective nature of the study are limitations, we propose to treat NAT-PML patients with PAT early after diagnosis, as seizures seem to be common and severe in NAT-PML. FAU - Hoepner, Robert AU - Hoepner R AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Gudrunstr. 56; 44719 Bochum; Germany. FAU - Dahlhaus, Stefanie AU - Dahlhaus S AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Kollar, Susanne AU - Kollar S AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Zurawski, Barbara AU - Zurawski B AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Chan, Andrew AU - Chan A AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Kleiter, Ingo AU - Kleiter I AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Gold, Ralf AU - Gold R AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. FAU - Hellwig, Kerstin AU - Hellwig K AD - Department of Neurology, Ruhr University Bochum, St Josef-Hospital, Germany. LA - eng PT - Journal Article PL - England TA - Ther Adv Neurol Disord JT - Therapeutic advances in neurological disorders JID - 101480242 PMC - PMC3886383 OTO - NOTNLM OT - natalizumab OT - preventive antiepileptic treatment OT - progressive multifocal leukoence-phalopathy OT - seizures COIS- Conflict of interest statement: A.C. receives financial gratification from Bayer, Biogen-Idec, MerckSerono, Sanofi-Aventis and Teva, and research support from the German Ministry for Education and Research, Bayer, Biogen Idec, MerckSerono and Novartis. I.K. receives financial support from Bayer, Biogen Idec, MerckSerono and Novartis, and research support from Bayer, Novartis Pharma and Biogen Idec. R.G. receives financial support from Biogen Idec, Baxter, Bayer, Chugai Pharmaceuticals, MerckSerono, Novartis, Roche, Sanofi-Aventis, Talecris and TEVA, and research support from Biogen-Idec, Genzyme, MerckSerono and TEVA. K.H. receives financial support from Bayer, Biogen Idec, MerckSerono, Teva, Sanofi-Aventis and Novartis and research support from the German Research Council. EDAT- 2014/01/11 06:00 MHDA- 2014/01/11 06:01 PMCR- 2014/01/01 CRDT- 2014/01/11 06:00 PHST- 2014/01/11 06:00 [entrez] PHST- 2014/01/11 06:00 [pubmed] PHST- 2014/01/11 06:01 [medline] PHST- 2014/01/01 00:00 [pmc-release] AID - 10.1177_1756285613503515 [pii] AID - 10.1177/1756285613503515 [doi] PST - ppublish SO - Ther Adv Neurol Disord. 2014 Jan;7(1):3-6. doi: 10.1177/1756285613503515.