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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
Age-related changes in serum immunoglobulins in patients with familial IgA deficiency and common variable immunodeficiency (CVID).
Clinical and Experimental Immunology 1997 June
The concentration of serum immunoglobulins in individuals with IgA deficiency (IgAD) and CVID can vary with age to have practical implications for evaluation, therapy, and genetic analysis. Most IgAD and CVID patients in our clinic population in the Southeastern United States have inherited part or all of two extended MHC haplotypes, referred to as haplotype 1 (HLA-DQB1 0201, HLA-DR3, C4B-Sf, C4A-0, G1-15, Bf-0.4, C2-a, HSP-7.5, TNF alpha-5, HLA-B8, HLA-A1) and haplotype 2 (HLA-DQB1 0201, HLA-DR-7, C4B-S, C4A-L, G11-4.5, Bf-0.6, C2-b, HSP-9, TNF alpha-9, HLA-B44, HLA-A29). In the present study, the clinic records of 68 CVID patients and 73 IgAD patients were reviewed to determine whether patients with familial or MHC-associated IgAD or CVID experience changes in serum immunoglobulin concentrations. An increase in serum immunoglobulin to the normal range was associated with clinical improvement in one patient with CVID and haplotype 2, two patients with IgAD and haplotype 2, and one IgAD patient whose haplotype was not determined. Two patients with haplotype 1 and one with haplotype 2 had a significant decline in serum immunoglobulin: one progressed from normal to IgAD associated with IgG subclass deficiencies, and two progressed from IgAD to CVID. Five of the seven patients with notable changing serum immunoglobulin levels have a family member with either IgAD or CVID. The findings suggest that familial, MHC-associated IgAD and CVID may be either progressive or reversible disorders, and emphasize the value of monitoring immunoglobulin levels in affected individuals and their family members.
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