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  • Küçük Resim
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    ILC3 deficiency and generalized ILC abnormalities in DOCK8-deficient patients
    (Blackwell Publishing Ltd, 2019) Eken, Ahmet; Cansever, Murat; Okuş, Fatma Zehra; Erdem, Şerife; Nain, Ercan; Azizoğlu, Zehra Betül; Haliloğlu, Yeşim; Karakukçu, Musa; Özcan, Alper; Devecioğlu, Ömer; Aksu, Güzide; Ayyıldız, Zeynep Arıkan; Topal, Erdem; Aydıner, Elif Karakoç; Kıykım, Ayça; Metin, Ayşe; Çipe, Funda; Kaya, Ayşenur; Artaç, Hasibe; Reisli, İsmail; Güner, Şükrü; Uygun, Vedat; Karasu, Gülsün Tezcan; Altuntaş, Hamiyet Dönmez; Canatan, Halit; Oukka, Mohamed; Özen, Ahmet; Chatila, Talal A.; Keleş, Sevgi; Barış, Sefa; Ünal, Ekrem; Patıroğlu, Türkan
    Background: Dedicator of cytokinesis 8 (DOCK8) deficiency is the main cause of the autosomal recessive hyper-IgE syndrome (HIES). We previously reported the selective loss of group 3 innate lymphoid cell (ILC) number and function in a Dock8-deficient mouse model. In this study, we sought to test whether DOCK8 is required for the function and maintenance of ILC subsets in humans. Methods: Peripheral blood ILC1-3 subsets of 16 DOCK8-deficient patients recruited at the pretransplant stage, and seven patients with autosomal dominant (AD) HIES due to STAT3 mutations, were compared with those of healthy controls or post-transplant DOCK8-deficient patients (n = 12) by flow cytometry and real-time qPCR. Sorted total ILCs from DOCK8- or STAT3-mutant patients and healthy controls were assayed for survival, apoptosis, proliferation, and activation by IL-7, IL-23, and IL-12 by cell culture, flow cytometry, and phospho-flow assays. Results: DOCK8-deficient but not STAT3-mutant patients exhibited a profound depletion of ILC3s, and to a lesser extent ILC2s, in their peripheral blood. DOCK8-deficient ILC1-3 subsets had defective proliferation, expressed lower levels of IL-7R, responded less to IL-7, IL-12, or IL-23 cytokines, and were more prone to apoptosis compared with those of healthy controls. Conclusion: DOCK8 regulates human ILC3 expansion and survival, and more globally ILC cytokine signaling and proliferation. DOCK8 deficiency leads to loss of ILC3 from peripheral blood. ILC3 deficiency may contribute to the susceptibility of DOCK8-deficient patients to infections. © 2019 EAACI and John Wiley and Sons A/S. Published by John Wiley and Sons Ltd.
  • Küçük Resim Yok
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    Transient hypogammaglobulinemia and unclassified hypogammaglobulinemia: 'Similarities and differences'
    (WILEY, 2010) Keleş, Sevgi; Artaç, Hasibe; Kara, Reyhan; Göktürk, Bahar; Özen, Ahmet; Reisli, İsmail
    Transient hypogammaglobulinemia of infancy (THI) is characterized by recurrent infections and one or more reduced serum immunoglobulin (Ig) levels. Usually, this clinical picture resolves spontaneously by 3 yr of age. However, hypogammaglobulinemia persists until adolescence in some patients. In recent years, those patients have been classified as undefined/unclassified hypogammaglobulinemia (UCH). We aimed to evaluate the clinical and immunologic features of patients with THI and UCH considering age of recovery and to assess relationships between hypogammaglobulinemia, infections, and allergic manifestations. We reviewed the medical records of children followed with a diagnosis of hypogammaglobulinemia from 2001 to 2007. Patients with decreased levels (< 2 s.d.) of one or more major Ig isotypes (IgG, IgA, IgM) with normal antibody responses and lymphocyte subpopulations were included (n = 374). Those patients whose Igs normalized during the follow-up period were classified as THI and the others as UCH. The THI group consisted of 71 patients (27 females, 44 males) with a mean recovery age of 68.87 +/- 36.5 months. About 95% of patients with THI recovered before 10 yr of age. The UCH group consisted of 303 patients (105 females, 198 males) with a mean age at diagnosis of 52 +/- 42 months. The most common presenting manifestations in the THI and UCH groups were upper respiratory tract infections (URTIs), lower respiratory tract infections, and asthma (42%, 50%, and 52% in the THI group vs. 39%, 53%, and 55% in the UCH group, respectively). In the THI group, the prevalence of atopic disease was related to age and found to be increased markedly after 44 months. In all patients, the prevalence of asthma was independently and positively associated with family history of atopy and age, whereas it was negatively associated with recurrent URTIs. Patients with THI and UCH have similar clinical and immunologic features. The normalization of Igs may be delayed in a majority of the patients with hypogammaglobulinemia. This observation may be a contribution to the classical definition and diagnostic criteria for THI.