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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+Clin+Immunol
2015 ; 35
(2
): 119-24
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Identification of patients with RAG mutations previously diagnosed with common
variable immunodeficiency disorders
#MMPMID25516070
Buchbinder D
; Baker R
; Lee YN
; Ravell J
; Zhang Y
; McElwee J
; Nugent D
; Coonrod EM
; Durtschi JD
; Augustine NH
; Voelkerding KV
; Csomos K
; Rosen L
; Browne S
; Walter JE
; Notarangelo LD
; Hill HR
; Kumánovics A
J Clin Immunol
2015[Feb]; 35
(2
): 119-24
PMID25516070
show ga
PURPOSE: Combined immunodeficiency (CID) presents a unique challenge to
clinicians. Two patients presented with the prior clinical diagnosis of common
variable immunodeficiency (CVID) disorder marked by an early age of presentation,
opportunistic infections, and persistent lymphopenia. Due to the presence of
atypical clinical features, next generation sequencing was applied documenting
RAG deficiency in both patients. METHODS: Two different genetic analysis
techniques were applied in these patients including whole exome sequencing in one
patient and the use of a gene panel designed to target genes known to cause
primary immunodeficiency disorders (PIDD) in a second patient. Sanger dideoxy
sequencing was used to confirm RAG1 mutations in both patients. RESULTS: Two
young adults with a history of recurrent bacterial sinopulmonary infections,
viral infections, and autoimmune disease as well as progressive
hypogammaglobulinemia, abnormal antibody responses, lymphopenia and a prior
diagnosis of CVID disorder were evaluated. Compound heterozygous mutations in
RAG1 (1) c256_257delAA, p86VfsX32 and (2) c1835A>G, pH612R were documented in one
patient. Compound heterozygous mutations in RAG1 (1) c.1566G>T, p.W522C and (2)
c.2689C>T, p. R897X) were documented in a second patient post-mortem following a
fatal opportunistic infection. CONCLUSION: Astute clinical judgment in the
evaluation of patients with PIDD is necessary. Atypical clinical findings such as
early onset, granulomatous disease, or opportunistic infections should support
the consideration of atypical forms of late onset CID secondary to RAG
deficiency. Next generation sequencing approaches provide powerful tools in the
investigation of these patients and may expedite definitive treatments.