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© Research
Publication : Nature

Defects in cardiac outflow tract formation and pro-B-lymphocyte expansion in mice lacking Sox-4

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature - 25 Apr 1996

Schilham MW, Oosterwegel MA, Moerer P, Ya J, de Boer PA, van de Wetering M, Verbeek S, Lamers WH, Kruisbeek AM, Cumano A, Clevers H

Link to Pubmed [PMID] – 8614465

Nature 1996 Apr;380(6576):711-4

A striking example of the relationship between regulation of transcription and phenotype is the central role of the Y-chromosomal gene Sry in mammalian sex determination. Sry is the founding member of a large family of so-called Sox genes. During murine embryogenesis, the transcriptional activator Sox-4 is expressed at several sites, but in adult mice expression is restricted to immature B and T lymphocytes. Using targeted gene distruption, we have found that SOX-4(-/-) embryos succumb to circulatory failure at day E14. This was a result of impaired development of the endocardial ridges (a specific site of Sox-4 expression) into the semilunar valves and the outlet portion of the muscular ventricular septum. The observed range of septation defects is known as ‘common arterial trunk’ in man. We studied haemopoiesis in lethally irradiated mice reconstituted with SOX-4(-/-) fetal liver cells and found that a specific block occurred in B-cell development at the pro-B cell stage. In line with this, the frequency and proliferative capacity of IL-7-responsive B cell progenitors in fetal liver were severely decreased in vitro.

http://www.ncbi.nlm.nih.gov/pubmed/8614465