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Case Reports
. 2019 Jun;143(6):2296-2299.
doi: 10.1016/j.jaci.2019.02.003. Epub 2019 Feb 13.

A combined immunodeficiency with severe infections, inflammation, and allergy caused by ARPC1B deficiency

Affiliations
Case Reports

A combined immunodeficiency with severe infections, inflammation, and allergy caused by ARPC1B deficiency

Stefano Volpi et al. J Allergy Clin Immunol. 2019 Jun.
No abstract available

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Conflict of interest statement

Disclosure of potential conflict of interest: The authors declare that they have no relevant conflicts of interests.

Figures

FIG 1.
FIG 1.
Clinical features, imaging, and histology of relevant tissues in affected patients. A, Frequencies of clinical manifestations in ARPC1B-deficient patients (detailed in Table E8). B-D, Diffuse warts, eczema, and skin vasculitis in P7. E, Sialadenitis and lymph node enlargement in P3. CMV, cytomegalovirus; GH, growth hormone.
FIG 2.
FIG 2.
Immune cell abnormalities. A, Representative plots of the altered B-lymphocyte staining (left panel), B-lymphocyte percentage (middle panel), and CD19 expression (geometric mean fluorescence intensity, right panel) in ARPC1B-deficient patients. For CD4+ and CD8+ T-cell subsets (naive, memory, and effector-memory populations), see Fig E1. B, Treg-cell subset analysis with a representative dot plot showing percentage of Treg cells (CD4+CD25RAposCD127neg), and Treg FOXP3 and Helios expression. C, FOXP3 and Helios expression of In vitro expanded Treg cells from patient and control (lines connect each patient with their own healthy relative used as control). D, FACS plots showing the proliferation of allogeneic T-responder cells (Tresp) measured by cell-trace violet (CTV) dilution. The stimulated and unstimulated Tresp without Treg cells are shown in blue. Treg cells from controls (in gray) and patients (in red) were cultured at different ratios with Tresp cells while stimulated with anti-CD3/CD28. E, Quantification of CD4 and CD8 Tresp-cell suppression by Treg cells. F, NK cells of patients were functionally evaluated against the K562 cell line by CD107A expression experiments. Resting NK cells (left panel) and IL-2–stimulated cells (right panel) were evaluated and compared with 10 healthy controls. All controls are represented by healthy adults. Bars indicate means ± SD, and a star indicates statistical significance as assessed by Mann-Whitney test (P < .05). Stim, Stimulated; unstim, unstimulated.

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References

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