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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Allergy+Clin+Immunol
2008 ; 122
(1
): 181-7
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gab.com Text
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English Wikipedia
Novel signal transducer and activator of transcription 3 (STAT3) mutations,
reduced T(H)17 cell numbers, and variably defective STAT3 phosphorylation in
hyper-IgE syndrome
#MMPMID18602572
Renner ED
; Rylaarsdam S
; Anover-Sombke S
; Rack AL
; Reichenbach J
; Carey JC
; Zhu Q
; Jansson AF
; Barboza J
; Schimke LF
; Leppert MF
; Getz MM
; Seger RA
; Hill HR
; Belohradsky BH
; Torgerson TR
; Ochs HD
J Allergy Clin Immunol
2008[Jul]; 122
(1
): 181-7
PMID18602572
show ga
BACKGROUND: Hyper-IgE syndrome (HIES) is a rare, autosomal-dominant
immunodeficiency characterized by eczema, Staphylococcus aureus skin abscesses,
pneumonia with pneumatocele formation, Candida infections, and
skeletal/connective tissue abnormalities. Recently it was shown that heterozygous
signal transducer and activator of transcription 3 (STAT3) mutations cause
autosomal-dominant HIES. OBJECTIVE: To determine the spectrum and functional
consequences of heterozygous STAT3 mutations in a cohort of patients with HIES.
METHODS: We sequenced the STAT3 gene in 38 patients with HIES (National
Institutes of Health score >40 points) from 35 families, quantified T(H)17 cells
in peripheral blood, and evaluated tyrosine phosphorylation of STAT3. RESULTS:
Most STAT3 mutations in our cohort were in the DNA-binding domain (DBD; 22/35
families) or Src homology 2 (SH2) domain (10/35) and were missense mutations. We
identified 2 intronic mutations resulting in exon skipping and in-frame deletions
within the DBD. In addition, we identified 2 mutations located in the
transactivation domain downstream of the SH2 domain: a 10-amino acid deletion and
an amino acid substitution. In 1 patient, we were unable to identify a STAT3
mutation. T(H)17 cells were absent or low in the peripheral blood of all patients
who were evaluated (n = 17). IL-6-induced STAT3-phosphorylation was consistently
reduced in patients with SH2 domain mutations but comparable to normal controls
in patients with mutations in the DBD. CONCLUSION: Heterozygous STAT3 mutations
were identified in 34 of 35 unrelated HIES families. Patients had impaired T(H)17
cell development, and those with SH2 domain mutations had reduced STAT3
phosphorylation.