TY - JOUR
T1 - A novel form of cell type-specific partial IFN-γR1 deficiency caused by a germ line mutation of the IFNGR1 initiation codon
AU - Kong, Xiao Fei
AU - Vogt, Guillaume
AU - Chapgier, Ariane
AU - Lamaze, Christophe
AU - Bustamante, Jacinta
AU - Prando, Carolina
AU - Fortin, Anny
AU - Puel, Anne
AU - Feinberg, Jacqueline
AU - Zhang, Xin Xin
AU - Gonnord, Pauline
AU - Pihkala-Saarinen, Ulla M.
AU - Arola, Mikko
AU - Moilanen, Petra
AU - Abel, Laurent
AU - Korppi, Matti
AU - Boisson-Dupuis, Stéphanie
AU - Casanova, Jean Laurent
N1 - Funding Information:
The Laboratory of Human Genetics of Infectious Diseases is supported by grants from The Rockefeller University Center for Clinical and Translational Science grant number 5UL1RR024143-03 and The Rockefeller University, the Schlumberger Foundation, the BNP-Paribas Foundation, the ‘Institut Universitaire de France,’ and the EU-grant QLK2-CT-2002-00846. X.-F.K. is supported by a Choh-Hao Li Memorial Fund Scholar award and the Shanghai Educational Development Foundation.
PY - 2009/10/31
Y1 - 2009/10/31
N2 - IFN-γR1 deficiency is a genetic etiology of Mendelian susceptibility to mycobacterial diseases, and includes two forms of complete recessive deficiency, with or without cell surface expression, and two forms of partial deficiency, dominant or recessive. We report here a novel form of partial and recessive Interferon g receptor 1 (IFN-γR1) deficiency, which is almost as severe as complete deficiency. The patient is homozygous for a mutation of the initiation codon (M1K). No detectable expression and function of IFN-γR1 were found in the patient's fibroblasts. However, IFN-γR1 expression was found to be impaired, but not abolished, on the EBV-transformed B cells, which could respond weakly to IFN-γ. The mechanism underlying this weak expression involves leaky translation initiation at both non-AUG codons and the third AUG codon at position 19. It results in the residual expression of IFN-γR1 protein of normal molecular weight and function. The residual IFN-γ signaling documented in this novel form of partial IFN-γR1 deficiency was not ubiquitous and was milder than that seen in other forms of partial IFN-γR1 deficiency, accounting for the more severe clinical phenotype of the patient, which was almost as severe as that of patients with complete deficiency.
AB - IFN-γR1 deficiency is a genetic etiology of Mendelian susceptibility to mycobacterial diseases, and includes two forms of complete recessive deficiency, with or without cell surface expression, and two forms of partial deficiency, dominant or recessive. We report here a novel form of partial and recessive Interferon g receptor 1 (IFN-γR1) deficiency, which is almost as severe as complete deficiency. The patient is homozygous for a mutation of the initiation codon (M1K). No detectable expression and function of IFN-γR1 were found in the patient's fibroblasts. However, IFN-γR1 expression was found to be impaired, but not abolished, on the EBV-transformed B cells, which could respond weakly to IFN-γ. The mechanism underlying this weak expression involves leaky translation initiation at both non-AUG codons and the third AUG codon at position 19. It results in the residual expression of IFN-γR1 protein of normal molecular weight and function. The residual IFN-γ signaling documented in this novel form of partial IFN-γR1 deficiency was not ubiquitous and was milder than that seen in other forms of partial IFN-γR1 deficiency, accounting for the more severe clinical phenotype of the patient, which was almost as severe as that of patients with complete deficiency.
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U2 - 10.1093/hmg/ddp507
DO - 10.1093/hmg/ddp507
M3 - Article
C2 - 19880857
AN - SCOPUS:77949902855
SN - 0964-6906
VL - 19
SP - 434
EP - 444
JO - Human molecular genetics
JF - Human molecular genetics
IS - 3
M1 - ddp507
ER -