Johanson-Blizzard syndrome is a rare, sometimes fatal disorder that is inherited in autosomal recessive pattern. Exocrine pancreatic insufficiency including decreased secretion of lipases and trypsinogen is the most consistent feature. Nasal wing hypoplasia, scalp defects, and sensorineural hearing loss are additional clinical features of the disease. The causative gene, ubiquitin-protein ligase E3 component N-recognin 1 (UBR1), is involved in protein destabilization.
Category
Congenital malformation
Brite
Human diseases in ICD-11 classification [BR:br08403]
20 Developmental anomalies
Multiple developmental anomalies or syndromes
LD27 Syndromes with skin or mucosal anomalies as a major feature
H00571 Johanson-Blizzard syndrome
Zenker M, Mayerle J, Lerch MM, Tagariello A, Zerres K, Durie PR, Beier M, Hulskamp G, Guzman C, Rehder H, Beemer FA, Hamel B, Vanlieferinghen P, Gershoni-Baruch R, Vieira MW, Dumic M, Auslender R, Gil-da-Silva-Lopes VL, Steinlicht S, Rauh M, Shalev SA, Thiel C, Ekici AB, Winterpacht A, Kwon YT, Varshavsky A, Reis A
Title
Deficiency of UBR1, a ubiquitin ligase of the N-end rule pathway, causes pancreatic dysfunction, malformations and mental retardation (Johanson-Blizzard syndrome).
