Abstract:
:PAX3 encodes a transcription factor, which with Zic1 is necessary for induction of the neural crest during early embryonic development. There are 7 human PAX3 isoforms (a-h). PAX3e is the full length isoform comprising 10 exons. PAX3c comprises 8 exons plus 5 codons of intron 8, while PAX3g has a truncated transactivation domain. Previous studies by us indicated that these isoforms have different activities in melanocytes in vitro. In this study, a mouse gene oligo array ( approximately 7.5 k oligos), from the Human Genome Mapping Project (HGMP) Resource Centre, was used to screen for alterations in downstream gene expression in PAX3c, PAX3e and PAX3g melanocyte transfectants, compared with empty vector controls. The data analyses identified 109 genes up or downregulated, at least 2-fold, and involved in cell differentiation, proliferation, migration, adhesion, apoptosis and angiogenesis. Semi-quantitative RT-PCR and Western blotting confirmed the changes identified by microarrays for several putative targets of PAX3, including Met, MyoD and Muc18, and previously undescribed targets, including Dhh, Fgf17, Kitl and Rac1. Thus, our data reveal that PAX3 isoforms regulate distinct but overlapping sets of genes in melanocytes in vitro.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Wang Q,Kumar S,Mitsios N,Slevin M,Kumar Pdoi
10.1002/ijc.22316subject
Has Abstractpub_date
2007-03-15 00:00:00pages
1223-31issue
6eissn
0020-7136issn
1097-0215journal_volume
120pub_type
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