Comparing the levels of CTLA-4-dependent biological defects in patients with LRBA deficiency and CTLA-4 insufficiency

Background Lipopolysaccharide-responsive beige-like anchor protein (LRBA) deficiency and cytotoxic T-lymphocyte protein-4 (CTLA-4) insufficiency are recently described disorders that present with susceptibility to infections, autoimmunity, and lymphoproliferation. Clinical and immunological comparisons of the diseases with long-term follow-up have not been previously reported. We sought to compare the clinical and laboratory manifestations of both diseases and investigate the role of flow cytometry in predicting the genetic defect in patients with LRBA deficiency and CTLA-4 insufficiency. Methods Patients were evaluated clinically with laboratory assessments for lymphocyte subsets, T follicular helper cells (T-FH), LRBA expression, and expression of CD25, FOXP3, and CTLA4 in regulatory T cells (Tregs) at baseline and 16 h post-stimulation. Results LRBA-deficient patients (n = 29) showed significantly early age of symptom onset, higher rates of pneumonia, autoimmunity, chronic diarrhea, and failure to thrive compared to CTLA-4 insufficiency (n = 12). In total, 29 patients received abatacept with favorable responses and the overall survival probability was not different between transplanted versus non-transplanted patients in LRBA deficiency. Meanwhile, higher probability of survival was observed in CTLA-4-insufficient patients (p = 0.04). The T-cell subsets showed more deviation to memory cells in CTLA-4-insufficiency, accompanied by low percentages of Treg and dysregulated cT(FH) cells response in both diseases. Cumulative numbers of autoimmunities positively correlated with cT(FH) frequencies. Baseline CTLA-4 expression was significantly diminished in LRBA deficiency and CTLA-4 insufficiency, but significant induction in CTLA-4 was observed after short-term T-cell stimulation in LRBA deficiency and controls, while this elevation was less in CTLA-4 insufficiency, allowing to differentiate this disease from LRBA deficiency with high sensitivity (87.5%) and specificity (90%). Conclusion This cohort provided detailed clinical and laboratory comparisons for LRBA deficiency and CTLA-4 insufficiency. The flow cytometric approach is useful in predicting the defective gene; thus, targeted sequencing can be conducted to provide rapid diagnosis and treatment for these diseases impacting the CTLA-4 pathway

Initial presenting manifestations in 16,486 patients with inborn errors of immunity include infections and noninfectious manifestations

none313siBackground: Inborn errors of immunity (IEI) are rare diseases, which makes diagnosis a challenge. A better description of the initial presenting manifestations should improve awareness and avoid diagnostic delay. Although increased infection susceptibility is a well-known initial IEI manifestation, less is known about the frequency of other presenting manifestations. Objective: We sought to analyze age-related initial presenting manifestations of IEI including different IEI disease cohorts. Methods: We analyzed data on 16,486 patients of the European Society for Immunodeficiencies Registry. Patients with autoinflammatory diseases were excluded because of the limited number registered. Results: Overall, 68% of patients initially presented with infections only, 9% with immune dysregulation only, and 9% with a combination of both. Syndromic features were the presenting feature in 12%, 4% had laboratory abnormalities only, 1.5% were diagnosed because of family history only, and 0.8% presented with malignancy. Two-third of patients with IEI presented before the age of 6 years, but a quarter of patients developed initial symptoms only as adults. Immune dysregulation was most frequently recognized as an initial IEI manifestation between age 6 and 25 years, with male predominance until age 10 years, shifting to female predominance after age 40 years. Infections were most prevalent as a first manifestation in patients presenting after age 30 years. Conclusions: An exclusive focus on infection-centered warning signs would have missed around 25% of patients with IEI who initially present with other manifestations.noneThalhammer J.; Kindle G.; Nieters A.; Rusch S.; Seppanen M.R.J.; Fischer A.; Grimbacher B.; Edgar D.; Buckland M.; Mahlaoui N.; Ehl S.; Boztug K.; Brunner J.; Demel U.F.; Forster-Waldl E.; Gasteiger L.M.; Goschl L.; Kojic M.; Schroll A.; Seidel M.G.; Wintergerst U.; Wisgrill L.; Sharapova S.O.; Goffard J.-C.; Kerre T.; Meyts I.; Roosens F.; Smet J.; Haerynck F.; Eric Z.P.; Milenova V.; Gagro A.; Richter D.; Chovancova Z.; Hlavackova E.; Litzman J.; Milota T.; Sediva A.; Elaziz D.A.; Alkady R.S.; El Sayed El Hawary R.; Eldash A.S.; Galal N.; Lotfy S.; Meshaal S.S.; Reda S.M.; Sobh A.; Elmarsafy A.; Brosselin P.; Courteille V.; De Vergnes N.; Kracker S.; Pergent M.; Randrianomenjanahary P.; Ahrenstorf G.; Albert M.H.; Ankermann T.; Atschekzei F.; Baumann U.; Becker B.C.; Behrends U.; Belohradsky B.H.; Biegner A.-K.; Binder N.; Bode S.F.N.; Boesecke C.; Boetticher B.; Borte M.; Borte S.; Classen C.F.; Dirks J.; Duckers G.; El-Helou S.; Ernst D.; Fasshauer M.; Fecker G.; Felgentreff K.; Foell D.; Ghosh S.; Girschick H.J.; Goldacker S.; Graf N.; Graf D.; Greil J.; Hanitsch L.G.; Hauck F.; Heeg M.; Heine S.I.; Henes J.C.; Hoenig M.; Holzer U.; Holzinger D.; Horneff G.; Hundsdoerfer P.; Jablonka A.; Jakoby D.; Joean O.; Kaiser-Labusch P.; Klemann C.; Kobbe R.; Korholz J.; Kramm C.M.; Kruger R.; Landwehr-Kenzel S.; Lehmberg K.; Liese J.G.; Lippert C.F.; Maccari M.E.; Masjosthusmann K.; Meinhardt A.; Metzler M.; Morbach H.; Muller I.; Naumann-Bartsch N.; Neubert J.; Niehues T.; Peter H.-H.; Rieber N.; Ritterbusch H.; Rockstroh J.K.; Roesler J.; Schauer U.; Scheible R.; Schmalzing M.; Schmidt R.E.; Schneider D.T.; Schreiber S.; Schuetz C.; Schulz A.; Schulze-Koops H.; Schulze-Sturm U.; Schuster V.; Schwaneck E.C.; Schwarz K.; Schwarze-Zander C.; Sirin M.; Skapenko A.; Sogkas G.; Sparber-Sauer M.; Speckmann C.; Steinmann S.; Stiehler S.; Tenbrock K.; von Bernuth H.; Warnatz K.; Wasmuth J.-C.; Weiss M.; Witte T.; Wittke K.; Wittkowski H.; Zeuner R.A.; Farmaki E.; Hatzistilianou M.N.; Kakkas I.; Kanariou M.G.; Kapousouzi A.; Liatsis E.; Maggina P.; Papadopoulou-Alataki E.; Raptaki M.; Speletas M.; Tantou S.; Goda V.; Krivan G.; Marodi L.; Abolhassani H.; Aghamohammadi A.; Rezaei N.; Feighery C.; Leahy T.R.; Ryan P.; Batzir N.A.; Garty B.Z.; Tamary H.; Aiuti A.; Amodio D.; Azzari C.; Barzaghi F.; Baselli L.A.; Cancrini C.; Carrabba M.; Cazzaniga M.; Cesaro S.; Chinello M.; Danieli M.G.; Dellepiane R.M.; Fabio G.; Gambineri E.; Lodi L.; Lougaris V.; Marasco C.; Martire B.; Marzollo A.; Milito C.; Moschese V.; Pignata C.; Plebani A.; Porta F.; Quinti I.; Ricci S.; Soresina A.; Tommasini A.; Vacca A.; Vanessa C.; Blaziene A.; Sitkauskiene B.; Gowin E.; Heropolitanska-Pliszka E.; Pietrucha B.; Szaflarska A.; Wiesik-Szewczyk E.; Wolska-Kusnierz B.; Esteves I.; Faria E.; Marques L.H.; Neves J.F.; Silva S.L.; Teixeira C.; Pereira da Silva S.; Capilna B.R.; Guseva M.N.; Shcherbina A.; Bobcakova A.; Ciznar P.; Gabzdilova J.; Jesenak M.; Kapustova L.; Orosova J.; Petrovicova O.; Raffac S.; Kopac P.; Allende L.M.; Antoli A.; Blanch G.R.; Carbone J.; Dieli-Crimi R.; Garcia-Prat M.; Gil-Herrera J.; Gonzalez-Granado L.I.; Agullo P.L.; Olbrich P.; Parra-Martinez A.; Paz-Artal E.; Pleguezuelo D.E.; Rodriguez N.S.; Sanchez-Ramon S.; Santos-Perez J.L.; Solanich X.; Soler-Palacin P.; Gonzalez-Amores M.; Ekwall O.; Fasth A.; Bitzenhofer-Gruber M.; Candotti F.; Dimitriou F.; Heininger U.; Holbro A.; Jandus P.; Kolios A.G.A.; Marschall K.; Schmid J.P.; Posfay-Barbe K.M.; Prader S.; Reichenbach J.; Steiner U.C.; Truck J.; Bredius R.G.; de Kruijf- Bazen S.; de Vries E.; Henriet S.S.V.; Kuijpers T.W.; Potjewijd J.; Rutgers A.; Stol K.; van Aerde K.J.; Van den Berg J.M.; van de Ven A.A.J.M.; Montfrans J.; Aydemir S.; Baris S.; Dogu F.; Ikinciogullari A.; Karakoc-Aydiner E.; Kilic S.S.; Kiykim A.; Kokcu Karadag S.I.; Kutukculer N.; Ocak S.; UNAL E.; Boyarchuk O.; Hilfanova A.; Kostyuchenko L.V.; Alachkar H.; Arkwright P.D.; Baxendale H.E.; Bernatoniene J.; Coulter T.I.; Garcez T.; Goddard S.; Gompels M.M.; Grigoriadou S.; Herriot R.; Herwadkar A.; Huissoon A.; Ibberson L.; Nademi Z.; Noorani S.; Parvin S.; Steele C.L.; Thomas M.; Waruiru C.; Yong P.F.K.; Bourne H.Thalhammer, J.; Kindle, G.; Nieters, A.; Rusch, S.; Seppanen, M. R. J.; Fischer, A.; Grimbacher, B.; Edgar, D.; Buckland, M.; Mahlaoui, N.; Ehl, S.; Boztug, K.; Brunner, J.; Demel, U. F.; Forster-Waldl, E.; Gasteiger, L. M.; Goschl, L.; Kojic, M.; Schroll, A.; Seidel, M. G.; Wintergerst, U.; Wisgrill, L.; Sharapova, S. O.; Goffard, J. -C.; Kerre, T.; Meyts, I.; Roosens, F.; Smet, J.; Haerynck, F.; Eric, Z. P.; Milenova, V.; Gagro, A.; Richter, D.; Chovancova, Z.; Hlavackova, E.; Litzman, J.; Milota, T.; Sediva, A.; Elaziz, D. A.; Alkady, R. S.; El Sayed El Hawary, R.; Eldash, A. S.; Galal, N.; Lotfy, S.; Meshaal, S. S.; Reda, S. M.; Sobh, A.; Elmarsafy, A.; Brosselin, P.; Courteille, V.; De Vergnes, N.; Kracker, S.; Pergent, M.; Randrianomenjanahary, P.; Ahrenstorf, G.; Albert, M. H.; Ankermann, T.; Atschekzei, F.; Baumann, U.; Becker, B. C.; Behrends, U.; Belohradsky, B. H.; Biegner, A. -K.; Binder, N.; Bode, S. F. N.; Boesecke, C.; Boetticher, B.; Borte, M.; Borte, S.; Classen, C. F.; Dirks, J.; Duckers, G.; El-Helou, S.; Ernst, D.; Fasshauer, M.; Fecker, G.; Felgentreff, K.; Foell, D.; Ghosh, S.; Girschick, H. J.; Goldacker, S.; Graf, N.; Graf, D.; Greil, J.; Hanitsch, L. G.; Hauck, F.; Heeg, M.; Heine, S. I.; Henes, J. C.; Hoenig, M.; Holzer, U.; Holzinger, D.; Horneff, G.; Hundsdoerfer, P.; Jablonka, A.; Jakoby, D.; Joean, O.; Kaiser-Labusch, P.; Klemann, C.; Kobbe, R.; Korholz, J.; Kramm, C. M.; Kruger, R.; Landwehr-Kenzel, S.; Lehmberg, K.; Liese, J. G.; Lippert, C. F.; Maccari, M. E.; Masjosthusmann, K.; Meinhardt, A.; Metzler, M.; Morbach, H.; Muller, I.; Naumann-Bartsch, N.; Neubert, J.; Niehues, T.; Peter, H. -H.; Rieber, N.; Ritterbusch, H.; Rockstroh, J. K.; Roesler, J.; Schauer, U.; Scheible, R.; Schmalzing, M.; Schmidt, R. E.; Schneider, D. T.; Schreiber, S.; Schuetz, C.; Schulz, A.; Schulze-Koops, H.; Schulze-Sturm, U.; Schuster, V.; Schwaneck, E. C.; Schwarz, K.; Schwarze-Zander, C.; Sirin, M.; Skapenko, A.; Sogkas, G.; Sparber-Sauer, M.; Speckmann, C.; Steinmann, S.; Stiehler, S.; Tenbrock, K.; von Bernuth, H.; Warnatz, K.; Wasmuth, J. -C.; Weiss, M.; Witte, T.; Wittke, K.; Wittkowski, H.; Zeuner, R. A.; Farmaki, E.; Hatzistilianou, M. N.; Kakkas, I.; Kanariou, M. G.; Kapousouzi, A.; Liatsis, E.; Maggina, P.; Papadopoulou-Alataki, E.; Raptaki, M.; Speletas, M.; Tantou, S.; Goda, V.; Krivan, G.; Marodi, L.; Abolhassani, H.; Aghamohammadi, A.; Rezaei, N.; Feighery, C.; Leahy, T. R.; Ryan, P.; Batzir, N. A.; Garty, B. Z.; Tamary, H.; Aiuti, A.; Amodio, D.; Azzari, C.; Barzaghi, F.; Baselli, L. A.; Cancrini, C.; Carrabba, M.; Cazzaniga, M.; Cesaro, S.; Chinello, M.; Danieli, M. G.; Dellepiane, R. M.; Fabio, G.; Gambineri, E.; Lodi, L.; Lougaris, V.; Marasco, C.; Martire, B.; Marzollo, A.; Milito, C.; Moschese, V.; Pignata, C.; Plebani, A.; Porta, F.; Quinti, I.; Ricci, S.; Soresina, A.; Tommasini, A.; Vacca, A.; Vanessa, C.; Blaziene, A.; Sitkauskiene, B.; Gowin, E.; Heropolitanska-Pliszka, E.; Pietrucha, B.; Szaflarska, A.; Wiesik-Szewczyk, E.; Wolska-Kusnierz, B.; Esteves, I.; Faria, E.; Marques, L. H.; Neves, J. F.; Silva, S. L.; Teixeira, C.; Pereira da Silva, S.; Capilna, B. R.; Guseva, M. N.; Shcherbina, A.; Bobcakova, A.; Ciznar, P.; Gabzdilova, J.; Jesenak, M.; Kapustova, L.; Orosova, J.; Petrovicova, O.; Raffac, S.; Kopac, P.; Allende, L. M.; Antoli, A.; Blanch, G. R.; Carbone, J.; Dieli-Crimi, R.; Garcia-Prat, M.; Gil-Herrera, J.; Gonzalez-Granado, L. I.; Agullo, P. L.; Olbrich, P.; Parra-Martinez, A.; Paz-Artal, E.; Pleguezuelo, D. E.; Rodriguez, N. S.; Sanchez-Ramon, S.; Santos-Perez, J. L.; Solanich, X.; Soler-Palacin, P.; Gonzalez-Amores, M.; Ekwall, O.; Fasth, A.; Bitzenhofer-Gruber, M.; Candotti, F.; Dimitriou, F.; Heininger, U.; Holbro, A.; Jandus, P.; Kolios, A. G. A.; Marschall, K.; Schmid, J. P.; Posfay-Barbe, K. M.; Prader, S.; Reichenbach, J.; Steiner, U. C.; Truck, J.; Bredius, R. G.; de Kruijf- Bazen, S.; de Vries, E.; Henriet, S. S. V.; Kuijpers, T. W.; Potjewijd, J.; Rutgers, A.; Stol, K.; van Aerde, K. J.; Van den Berg, J. M.; van de Ven, A. A. J. M.; Montfrans, J.; Aydemir, S.; Baris, S.; Dogu, F.; Ikinciogullari, A.; Karakoc-Aydiner, E.; Kilic, S. S.; Kiykim, A.; Kokcu Karadag, S. I.; Kutukculer, N.; Ocak, S.; Unal, E.; Boyarchuk, O.; Hilfanova, A.; Kostyuchenko, L. V.; Alachkar, H.; Arkwright, P. D.; Baxendale, H. E.; Bernatoniene, J.; Coulter, T. I.; Garcez, T.; Goddard, S.; Gompels, M. M.; Grigoriadou, S.; Herriot, R.; Herwadkar, A.; Huissoon, A.; Ibberson, L.; Nademi, Z.; Noorani, S.; Parvin, S.; Steele, C. L.; Thomas, M.; Waruiru, C.; Yong, P. F. K.; Bourne, H