Janssen E, Tsitsikov E, Al-Herz W, Lefranc G, Megarbane A, Dasouki M, Bonilla FA, Chatila T, Schneider L, Geha RS. Flow cytometry biomarkers distinguish DOCK8 deficiency from severe atopic dermatitis.
Clin Immunol 2013;
150:220-4. [PMID:
24440647 DOI:
10.1016/j.clim.2013.12.006]
[Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 12/18/2013] [Indexed: 11/17/2022]
Abstract
DOCK8 deficiency is a primary immunodeficiency characterized by recurrent sinopulmonary infections, dermatitis with cutaneous infections, elevated serum IgE levels, eosinophilia, and a high incidence of food allergy. Given the seriousness of DOCK8 deficiency, it is important to recognize it early and initiate appropriate therapy. Diagnosis relies on examining DOCK8 protein expression and sequencing of the 48 exons in the DOCK8 gene, but these assays are not always readily available. A major problem facing clinicians is that DOCK8 deficiency shares many clinical and laboratory features with severe atopic dermatitis. Here, we have identified biomarkers routinely measured by flow cytometry on whole blood in clinical immunology laboratories that may be used in distinguishing DOCK8 deficiency from severe atopic dermatitis. The use of these biomarkers may help the clinician identify those patients who are most likely to have DOCK8 mutations and would benefit from further specialized diagnostic testing.
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