Unusual phenotype in patients with a hypomorphic mutation in the DCLRE1C gene: IgG hypergammaglobulinemia with IgA and IgE deficiency.
Clin Immunol
; 213: 108366, 2020 04.
Article
em En
| MEDLINE
| ID: mdl-32092471
ABSTRACT
The nuclease Artemis is a enzyme for V(D)J recombination allowing for the creation of T and B lymphocytes as well as for the repair of radiation-induced DNA double strand breaks encoded by the DCLRE1C gene. Artemis-null mutations are a known cause of severe combined immunodeficiencies (SCIDs) with radiosensitivity. Hypomorphic mutations in Artemis have been reported to cause a "leaky SCID"" phenotype, typically with hypogammaglobulinemia. We present four patients, all harboring the same unique hypomorphic mutation in the DCLRE1C gene, an 8-base pair insertion (c.1299_1306dup, p.Cys436*) presenting with a relatively mild phenotype including pulmonary infectious EBV-related lymphoproliferative diseases, an autoimmune phenomenon. Non-typical findings of IgG hypergammaglobulinemia accompanied by IgA and IgE deficiency were recorded in all patients. The typical viral, fungal, and opportunistic infections were absent, and patients reached a relatively old age.
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MEDLINE
Assunto principal:
Imunoglobulina G
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Imunodeficiência Combinada Severa
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Proteínas de Ligação a DNA
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Endonucleases
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Hipergamaglobulinemia
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Bélgica