A novel ATM mutation associated with elevated atypical lymphocyte populations, hyper-IgM, and cutaneous granulomas

Copyright © 2019 Elsevier Inc. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Clinical immunology (Orlando, Fla.). - 1999. - 200(2019) vom: 14. März, Seite 55-63
1. Verfasser: Minto, Heather (VerfasserIn)
Weitere Verfasser: Mensah, Kofi A, Reynolds, Paul R, Meffre, Eric, Rubtsova, Kira, Gelfand, Erwin W
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Clinical immunology (Orlando, Fla.)
Schlagworte:Case Reports Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Ataxia-telangiectasia CD38(lo)CD21(−/low) B cells Fas Hyper-IgM T-bet Tfh mehr... Tregs γδ T cells Codon, Nonsense ATM protein, human EC 2.7.11.1 Ataxia Telangiectasia Mutated Proteins
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520 |a Ataxia-Telangiectasia (AT) is an immunodeficiency most often associated with T cell abnormalities. We describe a patient with a hyper-IgM phenotype and immune cell abnormalities that suggest a distinct clinical phenotype. Significant B cell abnormalities with increased unswitched memory B cells, decreased naive transitional B cells, and an elevated frequency of CD19+CD38loCD27-CD10-CD21-/low B cells expressing high levels of T-bet and Fas were demonstrated. The B cells were hyporesponsive to in vitro stimulation through the B cell receptor, Toll like receptors (TLR) 7 and 9, and CD40. T cell homeostasis was also disturbed with a significant increase in γδ T cells, circulating T follicular helper cells (Tfh), and decreased numbers of T regulatory cells. The ATM mutations in this patient are posited to have resulted in the perturbations in the frequencies and distributions of B and T cell subsets, resulting in the phenotype in this patient. KEY MESSAGES: A novel mutation creating a premature stop codon and a nonsense mutation in the ATM gene are postulated to have resulted in the unique clinical picture characterized by abnormal B and T cell populations, lymphocyte subset dysfunction, granuloma formation, and a hyper-IgM phenotype. CAPSULE SUMMARY: A patient presented with ataxia-telangiectasia, cutaneous granulomas, and a hyper-IgM phenotype; a novel combination of mutations in the ATM gene was associated with abnormal distributions, frequencies, and function of T and B lymphocyte subsets 
650 4 |a Case Reports 
650 4 |a Journal Article 
650 4 |a Research Support, N.I.H., Extramural 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Ataxia-telangiectasia 
650 4 |a CD38(lo)CD21(−/low) B cells 
650 4 |a Fas 
650 4 |a Hyper-IgM 
650 4 |a T-bet 
650 4 |a Tfh 
650 4 |a Tregs 
650 4 |a γδ T cells 
650 7 |a Codon, Nonsense  |2 NLM 
650 7 |a ATM protein, human  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
650 7 |a Ataxia Telangiectasia Mutated Proteins  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
700 1 |a Mensah, Kofi A  |e verfasserin  |4 aut 
700 1 |a Reynolds, Paul R  |e verfasserin  |4 aut 
700 1 |a Meffre, Eric  |e verfasserin  |4 aut 
700 1 |a Rubtsova, Kira  |e verfasserin  |4 aut 
700 1 |a Gelfand, Erwin W  |e verfasserin  |4 aut 
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773 1 8 |g volume:200  |g year:2019  |g day:14  |g month:03  |g pages:55-63 
856 4 0 |u http://dx.doi.org/10.1016/j.clim.2019.01.002  |3 Volltext 
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