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  • Title: A novel compound heterozygous TACI mutation in an autosomal recessive common variable immunodeficiency (CVID) family.
    Author: Lougaris V, Gallizzi R, Vitali M, Baronio M, Salpietro A, Bergbreiter A, Salzer U, Badolato R, Plebani A.
    Journal: Hum Immunol; 2012 Aug; 73(8):836-9. PubMed ID: 22627058.
    Abstract:
    Common variable immunodeficiency (CVID) is a primary immune disorder characterized by low immunoglobulin serum levels and increased susceptibility to infections. Underlying genetic causes are only known in less than 15% of patients and encompass mutations in the genes encoding for ICOS, TACI, BAFF-R, CD19, CD20, CD81 and MSH5. TACI is the most frequently mutated gene among CVID patients. We report on two pediatric Italian male siblings with hypogammaglobulinemia and recurrent respiratory and gastrointestinal infections in association with a novel compound heterozygous TACI mutation. Both patients carry the I87N/C104R mutation that has not been reported yet. This results in aberrant TACI expression and abrogates APRIL binding on EBV B cells. This study identifies a novel combined mutation in TNFRSF13B increasing the spectrum of TACI mutations associated with CVID.
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