IL7R and rag1/2 Genes mutations/polymorphisms in patients SCID

SCID disorder is major failure of the immune system, usually genetic. The aim of this study was on mutations detection of RAG1, RAG2, and IL7RG genes in SCID cases. Mutation detection was performed by PCR sequencing. Our results indicated that 13 mutations were found through cases which include 4 mutations in IL7R gene [T661I, I138V, T56A, C57W], 7 mutations in RAG1 [W896X, W204R, M324V, T731I, Ml006V, K820R, and R249H], and 2 mutations in RAG2 gene [R229W, deltaT251]

[Mutations in RAG1 and ADA genes in patients with severe combined immunodeficiency [SCID]: report of new mutations]

Severe combined immunodeficiency [SCID] is a rare and mortal disorder with X-linked and autosomal recessive inheritance. Many genes is related to the disease including ADA, RAG1, RAG2, Artemis, CD45, JAK3, IL7R which have different clinical presentation and T and B lymphocytes profile. In this study, we investigated gene mutations in suspected patients referred to the Children Medical Center Hospital, Department of Allergy and Clinical Immunology. Blood tests for patients showed T-B-profile, so we selected the genes that were responsible in T and B cell maturation [ADA, RAG1 and RAG2]. According to our possibilities, we studied ADA and RAG1 genes in patients. We did the test by PCR and Sequencing method. Also total ADA activity [tADA] and its isoenzymes [ADA1 and ADA2] were estimated in patients. Our investigation showed two mutations in ADA gene and three in RAG1 gene. In this study, we offer a new protocol for investigation of RAG1 gene. This is the first study on diagnosis of SCID patients through genetic investigation in Iranian patients