Abstract:
:Congenital disorder of N-linked deglycosylation (CDDG, MIM 615273) is a very rare autosomal recessive disorder caused by pathogenic variants in the NGLY1 gene. Transient transaminitis is the typical hepatic dysfunction described in these patients, but also included neonatal jaundice, hepatomegaly, splenomegaly, and steatosis. Microscopically, intrahepatic cytoplasmic inclusions and fibrosis are seen. We report a five-year-old male patient who presented a severe episode of acute liver failure (ALF). Exome sequencing identified compound heterozygous pathogenic/likely pathogenic variants in the NGLY1 gene: NM_018297.3:c.1891del, p.(Gln631Serfs*7) in exon 12 and NM_018297.3:c.531dup, p.(Asn178Glnfs*9) in exon 4. Serology for the most frequent viral hepatitis infections, autoimmune panel, and investigations for metabolic or toxic causes were also normal or negative. Hepatic disease resolved favorably after 46 days. Liver function tests and elastography remains normal after a 2-year follow-up. This is the first report of a reversible ALF among patients with NGLY1-CDDG. Although its definitive cause remains unknown, we suggest a direct relation between liver disease and mitochondrial respiratory chain damage in the context of impaired NGLY1 gene function. Further reports are required in order to know the long-term prognosis of ALF in patients with NGLY1-CDDG.
journal_name
Eur J Med Genetjournal_title
European journal of medical geneticsauthors
Rios-Flores IM,Bonal-Pérez MÁ,Castellanos-González A,Velez-Gómez E,Bertoli-Avella AM,Bobadilla-Morales L,Peña-Padilla C,Appendini-Andrade V,Corona-Rivera A,Romero-Valenzuela I,Corona-Rivera JRdoi
10.1016/j.ejmg.2020.103952subject
Has Abstractpub_date
2020-08-01 00:00:00pages
103952issue
8eissn
1769-7212issn
1878-0849pii
S1769-7212(20)30026-4journal_volume
63pub_type
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