BACKGROUND: Pax6 is a transcription factor that is required for induction, growth, and maintenance of the lens; however, few direct target genes of Pax6 are known. RESULTS: In this report, we describe the results of a cDNA microarray analysis of lens transcripts from transgenic mice over-expressing Pax6 in lens fibre cells in order to narrow the field of potential direct Pax6 target genes. This study revealed that the transcript levels were significantly altered for 508 of the 9700 genes analysed, including five genes encoding the cell adhesion molecules beta1-integrin, JAM1, L1 CAM, NCAM-140 and neogenin. Notably, comparisons between the genes differentially expressed in Pax6 heterozygous and Pax6 over-expressing lenses identified 13 common genes, including paralemmin, GDIbeta, ATF1, Hrp12 and Brg1. Immunohistochemistry and Western blotting demonstrated that Brg1 is expressed in the embryonic and neonatal (2-week-old) but not in 14-week adult lenses, and confirmed altered expression in transgenic lenses over-expressing Pax6. Furthermore, EMSA demonstrated that the BRG1 promoter contains Pax6 binding sites, further supporting the proposition that it is directly regulated by Pax6. CONCLUSIONS: These results provide a list of genes with possible roles in lens biology and cataracts that are directly or indirectly regulated by Pax6.
BACKGROUND:Pax6 is a transcription factor that is required for induction, growth, and maintenance of the lens; however, few direct target genes of Pax6 are known. RESULTS: In this report, we describe the results of a cDNA microarray analysis of lens transcripts from transgenic mice over-expressing Pax6 in lens fibre cells in order to narrow the field of potential direct Pax6 target genes. This study revealed that the transcript levels were significantly altered for 508 of the 9700 genes analysed, including five genes encoding the cell adhesion molecules beta1-integrin, JAM1, L1 CAM, NCAM-140 and neogenin. Notably, comparisons between the genes differentially expressed in Pax6 heterozygous and Pax6 over-expressing lenses identified 13 common genes, including paralemmin, GDIbeta, ATF1, Hrp12 and Brg1. Immunohistochemistry and Western blotting demonstrated that Brg1 is expressed in the embryonic and neonatal (2-week-old) but not in 14-week adult lenses, and confirmed altered expression in transgenic lenses over-expressing Pax6. Furthermore, EMSA demonstrated that the BRG1 promoter contains Pax6 binding sites, further supporting the proposition that it is directly regulated by Pax6. CONCLUSIONS: These results provide a list of genes with possible roles in lens biology and cataracts that are directly or indirectly regulated by Pax6.
Authors: Y Okano; M Asada; A Fujimoto; A Ohtake; K Murayama; K J Hsiao; K Choeh; Y Yang; Q Cao; J K Reichardt; S Niihira; T Imamura; T Yamano Journal: Am J Hum Genet Date: 2001-02-23 Impact factor: 11.025
Authors: Ying Yang; Tomás Stopka; Nady Golestaneh; Yan Wang; Kongming Wu; Anping Li; Bharesh K Chauhan; Chun Y Gao; Kveta Cveklová; Melinda K Duncan; Richard G Pestell; Ana B Chepelinsky; Arthur I Skoultchi; Ales Cvekl Journal: EMBO J Date: 2006-05-04 Impact factor: 11.598
Authors: Jih-Guang Yao; Bonnie M Weasner; Lan-Hsin Wang; Chuen-Chuen Jang; Brandon Weasner; Chiou-Yang Tang; Claire L Salzer; Chun-Hong Chen; Bruce Hay; Y Henry Sun; Justin P Kumar Journal: Dev Biol Date: 2008-01-04 Impact factor: 3.582
Authors: Yu Jin Jung; Yu Shin Park; Ki-Jun Yoon; Young-Yun Kong; Joon Won Park; Hong Gil Nam Journal: Nucleic Acids Res Date: 2008-11-29 Impact factor: 16.971