Molecules and Cells

  • 제39권5호
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  • Pages.395-402
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  • 2016
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  • 1016-8478(pISSN)
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  • 0219-1032(eISSN)
한국분자세포생물학회 (Korean Society for Molecular and Cellular Biology)
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Genes Frequently Coexpressed with Hoxc8 Provide Insight into the Discovery of Target Genes

  • Kalyani, Ruthala (Department of Anatomy, Embryology Lab., Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine) ;
  • Lee, Ji-Yeon (Department of Anatomy, Embryology Lab., Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine) ;
  • Min, Hyehyun (Department of Anatomy, Embryology Lab., Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine) ;
  • Yoon, Heejei (Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine) ;
  • Kim, Myoung Hee (Department of Anatomy, Embryology Lab., Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine)
  • 투고 : 2015.11.12
  • 심사 : 2016.02.15
  • 발행 : 2016.05.31
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초록

Identifying Hoxc8 target genes is at the crux of understanding the Hoxc8-mediated regulatory networks underlying its roles during development. However, identification of these genes remains difficult due to intrinsic factors of Hoxc8, such as low DNA binding specificity, context-dependent regulation, and unknown cofactors. Therefore, as an alternative, the present study attempted to test whether the roles of Hoxc8 could be inferred by simply analyzing genes frequently coexpressed with Hoxc8, and whether these genes include putative target genes. Using archived gene expression datasets in which Hoxc8 was differentially expressed, we identified a total of 567 genes that were positively coexpressed with Hoxc8 in at least four out of eight datasets. Among these, 23 genes were coexpressed in six datasets. Gene sets associated with extracellular matrix and cell adhesion were most significantly enriched, followed by gene sets for skeletal system development, morphogenesis, cell motility, and transcriptional regulation. In particular, transcriptional regulators, including paralogs of Hoxc8, known Hox co-factors, and transcriptional remodeling factors were enriched. We randomly selected Adam19, Ptpn13, Prkd1, Tgfbi, and Aldh1a3, and validated their coexpression in mouse embryonic tissues and cell lines following $TGF-{\beta}2$ treatment or ectopic Hoxc8 expression. Except for Aldh1a3, all genes showed concordant expression with that of Hoxc8, suggesting that the coexpressed genes might include direct or indirect target genes. Collectively, we suggest that the coexpressed genes provide a resource for constructing Hoxc8-mediated regulatory networks.

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참고문헌

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