During development, cells become determined or fixed in particular developmental pathways. However, each primordium contains a few cells that can be stimulated to change their fate. For example, in Drosophila,ectopic Wingless expression induces specific leg imaginal disc cells to transdetermine into wing cells. Klebes and co-workers investigate how this example of cellular plasticity is regulated by examining gene expression patterns in transdetermining cells and non-transdetermining cells from the same disc (see p. 3753). Genes implicated in transdetermination by this analysis include lamina ancestor (lama) and the Polycomb and trithorax group of chromatin regulators; functional assays provide additional evidence for the involvement of these genes in transdetermination. The researchers conclude that transdetermination depends on resetting the chromatin structure, which is only possible in a few cells. These insights into developmental plasticity may advance the development of human stem cells for medical applications.
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15 August 2005
Transdetermination: resetting chromatin
Online ISSN: 1477-9129
Print ISSN: 0950-1991
©2005.
2005
Development (2005) 132 (16): e1605.
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Transdetermination: resetting chromatin. Development 15 August 2005; 132 (16): e1605. doi:
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