RT Journal Article T1 Systematic review of drug therapy for chorea in NXK2-1- related disorders: Efficacy and safety evidence from case studies and series A1 Nou Fontanet, Laia A1 Martín Gómez, Carmen A1 Isabel Gómez, Rebeca A1 Bachoud Lévi, Anne Catherine A1 Zorzi, Giovanna A1 Capuano, Alessandro A1 Blasco Amaro, Juan Antonio A1 Ortigoza Escobar, Juan Darío AB Background: The NKX2-1-related disorders (NKX2-1-RD) is a rare disorder characterized by choreiform movements along with respiratory and endocrine abnormalities. The European Reference Network of Rare Neurological Disorders funded by the European Commission conducted a systematic review to assess drug treatment of chorea in NKX2-1-RD, aiming to provide clinical recommendations for its management. Methods: A systematic pairwise review using various databases, including MEDLINE, Embase, Cochrane, CINAHL, and PsycInfo, was conducted. The review included patients diagnosed with chorea and NKX2-1-RD genetic diagnosis, drug therapy as intervention, no comparator, and outcomes of chorea improvement and adverse events. The methodological quality of the studies was assessed, and the study protocol was registered in PROSPERO.Results: Of the 1417 studies examined, 28 studies met the selection criteria, consistingof 68 patients. The studies reported 22 different treatments for chorea, including carbidopa/levodopa, tetrabenazine, clonazepam, methylphenidate, carbamazepine, topiramate,trihexyphenidyl, haloperidol, propranolol, risperidone, and valproate. No clinicalimprovements were observed with carbidopa/levodopa, tetrabenazine, or clonazepam,and various adverse effects were reported. However, most patients treated with methylphenidateexperienced improvements in chorea and reported only a few negative effects.The quality of evidence was determined to be low.Conclusions: The management of chorea in individuals with NKX2-1-RD presents significantheterogeneity and lack of clarity. While the available evidence suggests that methylphenidatemay be effective in improving chorea symptoms, the findings should be interpreted with cautiondue to the limitations of the studies reviewed. Nonetheless, more rigorous and comprehensivestudies are necessary to provide sufficient evidence for clinical recommendations PB Wiley SN 1351-5101 SN 1468-1331 (electrónico) YR 2023 FD 2023 LK https://hdl.handle.net/10272/23291 UL https://hdl.handle.net/10272/23291 LA eng NO Nou‐Fontanet, L., Martín‐Gómez, C., Isabel‐Gómez, R., Bachoud‐Lévi, A., Zorzi, G., Capuano, A., Blasco‐Amaro, J. A., & Ortigoza‐Escobar, J. D. (2023). Systematic review of drug therapy for chorea in NXK2‐1‐related disorders: Efficacy and safety evidence from case studies and series. In European Journal of Neurology (Vol. 30, Issue 12, pp. 3928–3948). Wiley. https://doi.org/10.1111/ene.16038 NO This study is supported by the European Commission within the contract SANTE/2018/B3/030-SI2.813822under which the European Reference Networks (ERNs) Guidelines programme is being developed. This work is produced within the framework of the European Reference Network for Rare Neurological Diseases, Project ID 739510. DS Repositorio Institucional de la Universidad de Huelva RD 1 jun 2026