Revista medica de Chile · 2004
[Hyper-IgM syndrome in members of two unrelated Chilean families: molecular and mutation analysis].
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Luttges Pamela D, Retamal David F, Spencer Michael Y, Carrión Flavio A, Valenzuela Viviana M, Navarro Sara V, De Cornejo Mónica L
Аннотация
BACKGROUND: Hyper-IgM syndronie (HIGM) is a rare primary immunodeficiency used to describe a heterogeneous group of disorders characterized by recurrey bacterial infrctions, normal or elevated serum IgM levels and low or absent serum IgG, IgA and IgE.
AIM: To make definitive diagnosis, detect mutations in carriers and perform genetic counseling in patients with HIGM.
PATIENTS AND METHODS: We studied the expression of CD40L, CD40 and made a mutation analysis of the CD40L gene in 3 males of 2 unrelated Chilean families diagnosed as a possible syndrome of hyper-IgM and 3 relatives.
RESULTS: We identified a deletion frameshift in the exon 2 (delA225) of the extracellular domain of GD40L gene in one patient and verified the carrier stains of his mother and sister. The other patients showed a low expression of GD40L in activated T cells (65.3% ammd 65.5%) and a normal expressiomi of CD40. No alterations were found in the single strand conformation polymorphism analysis of the CD40L.
CONCLUSIONS: These result allowed us to make a definite diagnosis of HIGM1 of a patient, detect female carriers and suggest a HIGM of recessive inheritance with normal CD40 expression in the patients of the second family.
AIM: To make definitive diagnosis, detect mutations in carriers and perform genetic counseling in patients with HIGM.
PATIENTS AND METHODS: We studied the expression of CD40L, CD40 and made a mutation analysis of the CD40L gene in 3 males of 2 unrelated Chilean families diagnosed as a possible syndrome of hyper-IgM and 3 relatives.
RESULTS: We identified a deletion frameshift in the exon 2 (delA225) of the extracellular domain of GD40L gene in one patient and verified the carrier stains of his mother and sister. The other patients showed a low expression of GD40L in activated T cells (65.3% ammd 65.5%) and a normal expressiomi of CD40. No alterations were found in the single strand conformation polymorphism analysis of the CD40L.
CONCLUSIONS: These result allowed us to make a definite diagnosis of HIGM1 of a patient, detect female carriers and suggest a HIGM of recessive inheritance with normal CD40 expression in the patients of the second family.