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Rare homozygous nonsense variant in AIMP1 causing Early Onset Epileptic Encephalopathy with Burst Suppression (EOEE-BS).

Abstract：

:Pathogenic variants in AIMP1 gene are rare causes of neurologic disorders. Homozygous frameshift and nonsense variants in AIMP1 have been described in severe neurodegenerative disease. This is the third report of a homozygous nonsense variant in AIMP1 [c.115 C > T (p.Gln39*)] in a girl with severe neonatal onset epileptic encephalopathy. Like the two other cases reported, our patient is also of Filipino descent. Clinical features include microcephaly, poor visual motor development, shallow breathing, severe hypertonia in extremities, severe global developmental delay, poor gag and suck reflex, failure to thrive in the neonatal period, and early onset intractable seizures. Brain MRI showed hypoplasia of corpus callosum as well as cerebellar vermis, global volume loss and diminished myelination for her age. Electroencephalogram at four months of age showed background consisting of synchronous and asynchronous intervals of burst suppression with intermittent multifocal spikes predominantly in the bi-temporal region, suggestive of Early Onset Epileptic Encephalopathy with Burst Suppression (EOEE-BS) which has not been previously associated with the c.115 C > T variant in AIMP1. Of note, she presented to us in super refractory status epilepticus which was eventually controlled after administration of ketogenic diet and Epidiolex (cannabidiol). This report expands the genetic landscape of EOEE-BS. This is the first case of this specific variant in which Epidiolex was administered, which along with Ketogenic diet aided in controlling patient's super refractory status epilepticus.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Gupta S,Schwab M,Valdez-Gonzalez K,Segal E

doi

10.1016/j.ejmg.2020.103970

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

103970

issue

9

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(20)30076-8

journal_volume

63

pub_type

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