Normal B cell development and Pax5 expression in Thy28/ThyN1-deficient mice.

Thy28, also known as ThyN1, is a highly conserved nuclear protein. We previously showed that in a chicken mature B cell line, Thy28 binds to the promoter of the gene encoding Pax5, a transcription factor essential for B cell development, and positively regulates its expression. Here, we generated a Thy28-deficient mouse line to analyze its potential role in B cell development in mice. Thy28-deficient mice showed normal development of B cells, and the expression of Pax5 was comparable between wild-type and Thy28-deficient primary B cells. Thus, species-specific mechanisms regulate Pax5 expression and B cell development.

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