Zagaglia, Sara, Steel, Dora, Krithika, S., Hernandez-Hernandez, Laura, Custodio, Helena Martins, Gorman, Kathleen M., Vezyroglou, Aikaterini, Moller, Rikke S. ORCID: 0000-0002-9664-1448, King, Mary D., Hammer, Trine Bjorg, Spaull, Robert ORCID: 0000-0003-4096-6945, Fazeli, Walid, Bartolomaeus, Tobias, Doummar, Diane, Keren, Boris, Mignot, Cyril, Bednarek, Nathalie, Cross, J. Helen, Mallick, Andrew A., Sanchis-Juan, Alba, Basu, Anna, Raymond, F. Lucy, Lynch, Bryan J., Majumdar, Anirban, Stamberger, Hannah, Weckhuysen, Sarah ORCID: 0000-0003-2878-1147, Sisodiya, Sanjay M. and Kurian, Manju A. (2021). RHOBTB2 Mutations Expand the Phenotypic Spectrum of Alternating Hemiplegia of Childhood. Neurology, 96 (11). S. E1539 - 12. PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1526-632X

Full text not available from this repository.

Abstract

Objective To explore the phenotypic spectrum of RHOBTB2-related disorders and specifically to determine whether patients fulfill criteria for alternating hemiplegia of childhood (AHC), we report the clinical features of 11 affected individuals. Methods Individuals with RHOBTB2-related disorders were identified through a movement disorder clinic at a specialist pediatric center, with additional cases identified through collaboration with other centers internationally. Clinical data were acquired through retrospective case-note review. Results Eleven affected patients were identified. All had heterozygous missense variants involving exon 9 of RHOBTB2, confirmed as de novo in 9 cases. All had a complexmotor phenotype, including at least 2 different kinds of movement disorder, e.g., ataxia and dystonia. Many patients demonstrated several features fulfilling the criteria for AHC: 10 patients had a movement disorder including paroxysmal elements, and 8 experienced hemiplegic episodes. In contrast to classic AHC, commonly caused by mutations in ATP1A3, these events were reported later only in RHOBTB2 mutation-positive patients from 20 months of age. Seven patients had epilepsy, but of these, 4 patients achieved seizure freedom. All patients had intellectual disability, usually moderate to severe. Other features include episodes of marked skin color change and gastrointestinal symptoms, each in 4 patients. Conclusion Although heterozygous RHOBTB2 mutations were originally described in early infantile epileptic encephalopathy type 64, our study confirms that they account for a more expansive clinical phenotype, including a complex polymorphic movement disorder with paroxysmal elements resembling AHC. RHOBTB2 testing should therefore be considered in patients with an AHC-like phenotype, particularly those negative for ATPA1A3 mutations.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Zagaglia, SaraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Steel, DoraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krithika, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hernandez-Hernandez, LauraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Custodio, Helena MartinsUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gorman, Kathleen M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vezyroglou, AikateriniUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moller, Rikke S.UNSPECIFIEDorcid.org/0000-0002-9664-1448UNSPECIFIED
King, Mary D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hammer, Trine BjorgUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spaull, RobertUNSPECIFIEDorcid.org/0000-0003-4096-6945UNSPECIFIED
Fazeli, WalidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bartolomaeus, TobiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doummar, DianeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Keren, BorisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mignot, CyrilUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bednarek, NathalieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cross, J. HelenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mallick, Andrew A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sanchis-Juan, AlbaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Basu, AnnaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Raymond, F. LucyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lynch, Bryan J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Majumdar, AnirbanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stamberger, HannahUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weckhuysen, SarahUNSPECIFIEDorcid.org/0000-0003-2878-1147UNSPECIFIED
Sisodiya, Sanjay M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kurian, Manju A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-605792
DOI: 10.1212/WNL.0000000000011543
Journal or Publication Title: Neurology
Volume: 96
Number: 11
Page Range: S. E1539 - 12
Date: 2021
Publisher: LIPPINCOTT WILLIAMS & WILKINS
Place of Publication: PHILADELPHIA
ISSN: 1526-632X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
VARIANTSMultiple languages
Clinical NeurologyMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60579

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item