Tissue, cellular and sub-cellular localization of the Vangl2 protein during embryonic development: effect of the Lp mutation.
Loop-tail (Lp) mice show a very severe neural tube defect, craniorachischisis, which is caused by mis-sense mutations in the Vangl2 gene. The membrane protein Vangl2 belongs to a highly conserved group of proteins that regulate planar polarity in certain epithelia, and that are also important for convergent extension movements during gastrulation and neurulation. A specific anti-Vangl2 antiserum was produced and used to examine the tissue, cell type, and sub-cellular localization of Vangl2 during embryogenesis. Vangl2 protein is expressed at high levels in the neural tube and shows a dynamic expression profile during neurulation. After neural tube closure, robust Vangl2 staining is detected in several neural and neurosensory tissues, including cerebral cortex, dorsal root ganglia, olfactory epithelium, retina, mechanosensory hair cells of the cochlea, and optic nerve. Vangl2 is also expressed during organogenesis in a number of tubular epithelia, including the bronchial tree, intestinal crypt/villus axis, and renal tubular segments derived from ureteric bud and from metanephric mesenchyme. Examination of Vangl2 localization in the neural tubes and cochleas of the normal and Lp/Lp embryos shows disruption of normal membrane localization of Vangl2 in independent alleles at Lp (Lp, Lp(m1Jus)) as well as overall decrease in the expression level.
Torban
Elena
E
Department of Biochemistry, McGill University, 3655 Drummond, Room 907, Montreal, QC, Canada H3G-1Y6.
Wang
Hui-Jun
HJ
Patenaude
Anne-Marie
AM
Riccomagno
Martin
M
Daniels
Eugene
E
Epstein
Douglas
D
Gros
P
P
D000818:Animals; D002460:Cell Line; D002490:Central Nervous System / Q000196:embryology* / Q000378:metabolism; D047108:Embryonic Development / Q000235:genetics*; D018507:Gene Expression Regulation, Developmental; D006801:Humans; D015151:Immunoblotting; D051379:Mice; D008815:Mice, Inbred Strains; D008818:Mice, Neurologic Mutants / Q000235:genetics; D020125:Mutation, Missense; D009419:Nerve Tissue Proteins / Q000032:analysis / Q000235:genetics*; D009436:Neural Tube Defects / Q000196:embryology / Q000235:genetics; D038081:Organogenesis / Q000235:genetics; D010641:Phenotype; D014162:Transfection
C431577:Ltap protein, mouse; D009419:Nerve Tissue Proteins