Defining clinical subgroups and genotype-phenotype correlations in NBAS-associated disease across 110 patients.

Staufner, Christian; Peters, Bianca; Wagner, Matias; Alameer, Seham; Barić, Ivo; Broué, Pierre; Bulut, Derya; Church, Joseph A; Crushell, Ellen; Dalgıç, Buket; Das, Anibh M; Dick, Anke; Dikow, Nicola; Dionisi-Vici, Carlo; Distelmaier, Felix; Bozbulut, Neslihan Ekşi; Feillet, François; Gonzales, Emmanuel; Hadzic, Nedim; Hauck, Fabian; Hegarty, Robert; Hempel, Maja; Herget, Theresia; Klein, Christoph; Konstantopoulou, Vassiliki; Kopajtich, Robert; Kuster, Alice; Laass, Martin W; Lainka, Elke; Larson-Nath, Catherine; Leibner, Alexander; Lurz, Eberhard; Mayr, Johannes A; McKiernan, Patrick; Mention, Karine; Moog, Ute; Mungan, Neslihan Onenli; Riedhammer, Korbinian M; Santer, René; Palafoll, Irene Valenzuela; Vockley, Jerry; Westphal, Dominik S; Wiedemann, Arnaud; Wortmann, Saskia B; Diwan, Gaurav D; Russell, Robert B; Prokisch, Holger; Garbade, Sven F; Kölker, Stefan; Hoffmann, Georg F; Lenz, Dominic     «

Staufner, Christian; Peters, Bianca; Wagner, Matias; Alameer, Seham; Barić, Ivo; Broué, Pierre; Bulut, Derya; Church, Joseph A; Crushell, Ellen; Dalgıç, Buket; Das, Anibh M; Dick, Anke; Dikow, Nicola; Dionisi-Vici, Carlo; Distelmaier, Felix; Bozbulut, Neslihan Ekşi; Feillet, François; Gonzales, Emmanuel; Hadzic, Nedim; Hauck, Fabian; Hegarty, Robert; Hempel, Maja; Herget, Theresia; Klein, Christoph; Konstantopoulou, Vassiliki; Kopajtich, Robert; Kuster, Alice; Laass, Martin W; Lainka, Elke; Lars...     »

PURPOSE: Pathogenic variants in neuroblastoma-amplified sequence (NBAS) cause an autosomal recessive disorder with a wide range of symptoms affecting liver, skeletal system, and brain, among others. There is a continuously growing number of patients but a lack of systematic and quantitative analysis. METHODS: Individuals with biallelic variants in NBAS were recruited within an international, multicenter study, including novel and previously published patients. Clinical variables were analyzed with log-linear models and visualized by mosaic plots; facial profiles were investigated via DeepGestalt. The structure of the NBAS protein was predicted using computational methods. RESULTS: One hundred ten individuals from 97 families with biallelic pathogenic NBAS variants were identified, including 26 novel patients with 19 previously unreported variants, giving a total number of 86 variants. Protein modeling redefined the β-propeller domain of NBAS. Based on the localization of missense variants and in-frame deletions, three clinical subgroups arise that differ significantly regarding main clinical features and are directly related to the affected region of the NBAS protein: β-propeller (combined phenotype), Sec39 (infantile liver failure syndrome type 2/ILFS2), and C-terminal (short stature, optic atrophy, and Pelger-Huët anomaly/SOPH). CONCLUSION: We define clinical subgroups of NBAS-associated disease that can guide patient management and point to domain-specific functions of NBAS.      «

PURPOSE: Pathogenic variants in neuroblastoma-amplified sequence (NBAS) cause an autosomal recessive disorder with a wide range of symptoms affecting liver, skeletal system, and brain, among others. There is a continuously growing number of patients but a lack of systematic and quantitative analysis. METHODS: Individuals with biallelic variants in NBAS were recruited within an international, multicenter study, including novel and previously published patients. Clinical variables were analyzed wi...     »