[Show abstract][Hide abstract] ABSTRACT: Autosomal recessive IRAK-4 and MyD88 deficiencies predispose affected patients to recurrent invasive pyogenic bacterial infection. Both defects result in the selective impairment of cellular responses to Toll-like receptors (TLRs) other than TLR3 and of cellular responses to most interleukin-1 receptors (IL-1Rs), including IL-1R, IL-18R, and IL-33R. Hypomorphic mutations in the X-linked NEMO gene and hypermorphic mutations in the autosomal IKBA gene cause X-linked recessive and autosomal dominant anhidrotic ectodermal dysplasia with immunodeficiency (EDA-ID) syndromes. Both of these defects impair NF-κB-mediated cellular responses to multiple receptors, including TLRs, IL-1Rs, and tumor necrosis factor receptors (TNF-Rs). They therefore confer a much broader predisposition to infections than that for IRAK-4 and MyD88 deficiencies. These disorders were initially thought to be rare but have now been diagnosed in over 170 patients worldwide. We review here the infectious diseases affecting patients with inborn errors of NF-κB-dependent TLR and IL-1R immunity.
[Show abstract][Hide abstract] ABSTRACT: Mannose-binding lectin (MBL) is a serum protein of the innate immune system. MBL enhances opsonophagocytosis by binding to carbohydrates expressed by multiple pathogens. MBL deficiency is due to polymorphisms in the structural and promoter sequences of the MBL2 gene and is associated with variety of recurrent infections, including respiratory tract infections. We present a case of anhidrotic ectodermal dysplasia associated with severe mannose-binding lectin deficiency, never described in patients with anhidrotic ectodermal dysplasia.
Anales de Pediatría 07/2012; 77(1):43–46. DOI:10.1016/j.anpedi.2012.02.010 · 0.72 Impact Factor
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