2003
DOI: 10.1016/s0014-5793(03)00281-3
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Disabled‐2 small interfering RNA modulates cellular adhesive function and MAPK activity during megakaryocytic differentiation of K562 cells

Abstract: Previous studies have shown that Disabled-2 (DAB2) is up-regulated during megakaryocytic di¡erentiation 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 speci¢cally inhibited DAB2 induction, resulting in the modulation of cell^cell adhesion and mitogen-activated protein kinase (MAPK) phosphorylation. The morphological changes and L L3 integrin expression associated with m… Show more

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Cited by 61 publications
(57 citation statements)
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“…In TF1-KDR, the acquisition of an MK phenotype/morphology consistently follows a cell cycle arrest in G0/G1 and a transient phase of cell adhesion to the culture plate, indicating that the three processes are strictly related. This is in line with reports indicating that: (i) G1-S transition blockade is coupled with MK terminal differentiation and polyploidization; 37,38 (ii) adhesion can occur concomitantly with MK differentiation upon appropriate stimulation in both MK cell lines [39][40][41] and primary MK progenitors. 42 Furthermore, adhesion of MK progenitors/precursors to bone marrow endothelial cells supports terminal MK differentiation and thrombopoiesis in the vascular niche.…”
Section: Discussionsupporting
confidence: 92%
“…In TF1-KDR, the acquisition of an MK phenotype/morphology consistently follows a cell cycle arrest in G0/G1 and a transient phase of cell adhesion to the culture plate, indicating that the three processes are strictly related. This is in line with reports indicating that: (i) G1-S transition blockade is coupled with MK terminal differentiation and polyploidization; 37,38 (ii) adhesion can occur concomitantly with MK differentiation upon appropriate stimulation in both MK cell lines [39][40][41] and primary MK progenitors. 42 Furthermore, adhesion of MK progenitors/precursors to bone marrow endothelial cells supports terminal MK differentiation and thrombopoiesis in the vascular niche.…”
Section: Discussionsupporting
confidence: 92%
“…Plasmid Construction-The vector pTOPO-U6 II was constructed by inserting the short hairpin RNA expression cassette containing the mouse U6 promoter and the termination signal of RNA polymerase III into the pCRII-TOPO vector (Invitrogen), the procedure of which was similar to that of the pTOPO-U6 construction (26). Minor modifications were made to build the AvrII and BbsI sites outside of the inserted, designed 22-oligomer short hairpin RNA sequences (Fig.…”
Section: Methodsmentioning
confidence: 99%
“…3A). For the plasmid PDGFR-␣_778, and PDGFR-␤_2572, the complementary oligonucleotides PDGFR-␣_778 sense (5Ј-CTAG-ACGTTCAAGACCAGCGAGTTTACAAGCTTCTAAACT-CGCTGGTCTTGAACGT-3) and PDGFR-␣_778 antisense (5Ј-AAAAACGTTCAAGACCAGCGAGTTTAGAAGCTT-GTAAACTCGCTGGTCTTGAACGT-3Ј), and PDGFR-␤_2572 sense (5Ј-CTAGGGCATGGACTTCTTAGCCTCT-ACAAGCTTCTAGAGGCTAAGAAGTCCATGCC-3Ј) and PDGFR-␤_2572 antisense (5Ј-AAAAGGCATGGACTTCTT-AGCCTCTAGAAGCTTGTAGAGGCTAAGAAGTCCAT-GCC-3Ј) were annealed, respectively, as described by Tseng et al (26). For small interfering RNA of firefly luciferase, the complementary oligonucleotides FflS and FflAS were constructed and reported previously (27).…”
Section: Methodsmentioning
confidence: 99%
“…Cells labeled with PE markers are found scattered in the middle of the ICM (Yang et al, 2002). Dab2 is a PTB domain containing adaptor protein that modulates cellular adhesiveness during megakaryocytic differentiation of the human chronic myeloid leukemic cell line K562 (Tseng et al, 2003) and transiently interacts with Integrin ␤1 to regulate its activation during induced epithelial to mesenchymal transition in normal murine mammary gland cells (Prunier and Howe, 2005). Moreover, mutation of LamC1 and Integrin␤1, genes known to modulate cell adhesiveness, causes similar phenotypes (Stephens et al, 1995;Smyth et al, 1999).…”
Section: Molecular Regulation Of Epi/ Pe Lineage Formationmentioning
confidence: 99%