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© Research
Publication : Cell

Disruption of Krox-20 results in alteration of rhombomeres 3 and 5 in the developing hindbrain

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Cell - 17 Dec 1993

Schneider-Maunoury S, Topilko P, Seitandou T, Levi G, Cohen-Tannoudji M, Pournin S, Babinet C, Charnay P

Link to Pubmed [PMID] – 7903221

Cell 1993 Dec;75(6):1199-214

The zinc finger gene Krox-20 is transcribed in two alternate segments (rhombomeres) of the developing hindbrain. To investigate its function, we have used homologous recombination to generate mice carrying an in-frame insertion of the E. coli lacZ gene within Krox-20. Analysis of the beta-galactosidase pattern in heterozygous embryos confirmed the known profile with expression restricted to rhombomeres (r) 3 and 5. Mice homozygous for the mutation die during the first two weeks after birth. Anatomical analysis of the hindbrain and of the cranial nerves during embryogenesis, combined with the determination of the expression patterns of rhombomere-specific genes, demonstrated that Krox-20 inactivation results in a marked reduction or elimination of r3 and r5. We conclude that Krox-20, although not required for the initial delimitation of r3 and r5, plays an important role in the process of segmentation governing hindbrain development.

http://www.ncbi.nlm.nih.gov/pubmed/7903221