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Leukemia research v.20 no.4, 1996년, pp.333 - 341  

Detection of in vivo differentiation of murine WEHI-3B D+ leukemia cells transfected with the lac-Z marker gene using two-color flow cytometry

Hayashi, Moriaki ; Tomida, Mikio ; Hozumi, Motoo ; King, Ivan C. ; Sartorelli, Alan C. ;
  • 초록  

    Abstract The in vivo induction of the differentiation of murine WEHI-3B D + myelomonocytic leukemia cells was measured by flow cytometry, simultaneously staining leukemia cells for the marker exogenous β-galactosidase and for differentiation by the antigen Mac-1 (CD11b/CD18). The WEHI-3B D + leukemia cells were transfected with the E. coli lac-Z gene by electroporation and subclones that constitutively expressed high levels of the lac-Z gene product β-galactosidase were established. Flow cytometric analyses of cells in the peritoneal cavities of mice bearing leukemia cells showed that cells continued to express β-galactosidase for at least 14 days, and they were distinguishable from host-derived cells in vivo by their expression of the transfected gene. Simultaneous determination of the β-galactosidase activity and Mac-1 content of cells in the peritoneal cavities of mice revealed that administration of recombinant human granulocyte colony-stimulating factor (rhG-CSF) to the mice enhanced the expression of Mac-1 antigen by β-galactosidase-positive cells. The results demonstrate that G-CSF may have clinical potential as a therapeutic differentiating agent, and that flow cytometric analysis provides a useful in vivo system to evaluate the therapeutic potential of agents capable of inducing terminal differentiation.


  • 주제어

    Leukemia cell differentiation .   β-galactosidase .   Mac-1 antigen .   rG-CSF .   myelomonocytic leukemia.  

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