Osr1 functions downstream of Hedgehog pathway to regulate foregut development.

ABSTRACT: During early fetal development, paracrine Hedgehog (HH) ligands secreted from the foregut epithelium activate Gli transcription factors in the surrounding mesenchyme to coordinate formation of the respiratory system, digestive track and the cardiovascular network. Although disruptions to this process can lead to devastating congenital defects, the underlying mechanisms and downstream targets, are poorly understood. We show that the zinc finger transcription factor Osr1 is a novel HH target as Osr1 expression in the foregut mesenchyme depends on HH signaling and the effector of HH pathway Gli3 binds to a conserved genomic loci near Osr1 promoter region. Molecular analysis of mouse germline Osr1 mutants reveals multiple functions of Osr1 during foregut development. Osr1 mutants exhibit fewer

SUBMITTER: Han L 

PROVIDER: S-EPMC5519324 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature