Disabled-2 small interfering RNA modulates cellular adhesive function and MAPK activity during megakaryocytic differentiation of K562 cells

Ching Ping Tseng, Chien-Ling Huang, Ching Hui Huang, Ju Chien Cheng, Arnold Stern, Chin Hsiao Tseng, Daniel Tsun Yee Chiu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

61 Citations (Scopus)


Previous studies have shown that Disabled-2 (DAB2) is up-regulated during megakaryocytic differentiation of human K562 cells. To delineate the consequences of DAB2 induction, a DNA vector-based small interfering RNA (siRNA) was designed to intervene in DAB2 expression. We found that DAB2 siRNA specifically inhibited DAB2 induction, resulting in the modulation of cell-cell adhesion and mitogen-activated protein kinase (MAPK) phosphorylation. The morphological changes and β3 integrin expression associated with megakaryocytic differentiation were not affected. Since the MAPK pathway has been shown to involve DAB2 induction [Tseng et al., Biochem. Biophys. Res. Commun. 285 (2001) 129-135], our results suggest a reciprocal regulation between DAB2 and MAPK in the differentiation of K562 cells. In addition, we have demonstrated for the first time that DAB2 siRNA is a valuable tool for unveiling the biological consequences of DAB2 expression.
Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalFEBS Letters
Issue number1-3
Publication statusPublished - 24 Apr 2003
Externally publishedYes


  • Disabled-2
  • K562 cell
  • Megakaryocytic differentiation
  • Mitogen-activated protein kinase
  • Small interfering RNA

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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