Category Archives: Hum Pathol

Loss of ADAM17 is associated with severe multiorgan dysfunction.

Hum Pathol. 2015 Mar 5;

Authors: Bandsma RH, van Goor H, Yourshaw M, Horlings RK, Jonkman MF, Schölvinck EH, Karrenbeld A, Scheenstra R, Kömhoff M, Rump P, Koopman-Keemink Y, Nelson SF, Escher JC, Cutz E, Martín MG

Abstract
ADAM metallopeptidase domain 17 (ADAM17) is responsible for processing large numbers of proteins. Recently, 1 family involving 2 patients with a homozygous mutation in ADAM17 were described, presenting with skin lesions and diarrhea. In this report, we describe a second family confirming the existence of this syndrome. The proband presented with severe diarrhea, skin rash, and recurrent sepsis, eventually leading to her death at the age of 10 months. We performed exome sequencing and detailed pathological and immunological investigations. We identified a novel homozygous frameshift mutation in ADAM17 (NM_003183.4:c.308dupA) leading to a premature stop codon. CD4(+) and CD8(+) T-cell stimulation assays showed severely diminished tumor necrosis factor-α and interleukin-2 production. Skin biopsies indicated a focal neutrophilic infiltrate and spongiotic dermatitis. Interestingly, the patient developed unexplained systolic hypertension and nonspecific hepatitis with apoptosis. This report provides evidence for an important role of ADAM17 in human immunological response and underscores its multiorgan involvement.

PMID: 25804906 [PubMed – as supplied by publisher]

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