Mutation in LBX1/Lbx1 precludes transcription factor cooperativity and causes congenital hypoventilation in humans and mice.

ABSTRACT: The respiratory rhythm is generated by the preBötzinger complex in the medulla oblongata, and is modulated by neurons in the retrotrapezoid nucleus (RTN), which are essential for accelerating respiration in response to high CO₂ Here we identify a LBX1 frameshift (LBX1^FS ) mutation in patients with congenital central hypoventilation. The mutation alters the C-terminal but not the DNA-binding domain of LBX1 Mice with the analogous mutation recapitulate the breathing deficits found in humans. Furthermore, the mutation only interferes with a small subset of Lbx1 functions, and in particular with development of RTN neurons that coexpress Lbx1 and Phox2b. Genome-wide analyses in a cell culture model show that Lbx1^FS and wild-type Lbx1

SUBMITTER: Hernandez-Miranda LR 

PROVIDER: S-EPMC6304989 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature