Chunhong Gu

Publications (2)2.92 Total impact

• Article: Synergistic effects of troglitazone in combination with cytotoxic agents in acute myelogenous leukaemia cells.

  Chunhong Gu, Teng Ye, Richard A Wells
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  ABSTRACT: We have previously shown that troglitazone (TG) induces apoptosis in acute myelogenous leukaemia (AML) cell lines. Here we show that normal bone marrow and mobilized peripheral blood progenitors are highly resistant to TG at concentrations up to 100 microM, while primary cultures of AML bone marrow show significant decline in viability at >7.5 microM TG. The combination of standard cytotoxic agents (daunorubicin, etoposide, and cytarabine) with TG is synergistic in six AML cell lines, with the strongest synergy being exhibited when cells are pretreated with TG for 24h prior to addition of the cytotoxic agent. Significant declines in IC(50) for the cytotoxic agents are seen at nanomolar concentrations of TG. The in vitro synergy between TG and the cytotoxic drugs used in AML therapy provides a basis for in vivo evaluation of these combinations.
  Leukemia Research 12/2006; 30(11):1447-51. · 2.92 Impact Factor
• Article: [Study on gene expression changes of arsenic sulfide treated NB4 cells].

  Chunhong Gu, Fangyuan Chen, Jieying Han, Ye Teng, Nianxian Shao, Renrong Ouyang
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  ABSTRACT: To compare the gene expression status of NB4 cells before and after arsenic sulfide treatment by cDNA microarray. Two cDNA probes were made from mRNA of untreated or arsenic sulfide treated NB4 cells. The cells were labelled with Cy3 or Cy5 fluorescence dyes individually, hybridized with cDNA microarray, and scanned for fluorescent intensity. The altered gene expression was screened through the analysis of difference in gene expression profile. Thirty four genes related to apoptosis, cell cycle and others expressed different after the treatment of arsenic sulfide, 28/34 were up-regulated, 6/34 down-regulated. ABC50, PNAS-2 and cyclin G(2) might take part in the process of NB4 cell apoptosis induced by arsenic sulfide.
  Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi 02/2002; 23(1):16-8.