TITLE

甾醇类药NSC67657 诱导急性早幼粒细胞白血病HL⁃60 细胞单核系分化中Wnt 信号通路相关蛋白的表达

AUTHOR(S)
王晋蜀; 王伟佳; 王婷 张彦
PUB. DATE
April 2016
SOURCE
Chinese Journal of Oncology / Zhonghua Zhongliu Zazhi;4/23/2016, Vol. 38 Issue 4, p246
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Objective To investigate the expression of mRNA and proteins of β-catenin, TCF-4 (ICAT) and Wnt signaling pathway-related genes in the monocytic differentiation of acute myeloid leukemia HL-60 cells induced by a new steroidal drug NSC67657. Methods Wright's staining and α-NBE staining were used to observe the differentiation of HL-60 cells after 5 days of 10 μmol/L NSC67657 treatment. Flow cytometry (FCM) was used to detect the differentiation and cell cycles. The expressions of mRNA and proteins of ICAT and Wnt signaling pathway-related factors, including β-catenin, TCF-4, c-myc, cyclin D1 and TCF-1 before and after differentiation, were detected by RT-PCR and Western blot. Results Morphological observation showed that NSC67657 induced monocytic differentiation of HL-60 cells. At 5 days after 10 μmol/L NSC67657 treatment, the number of CD14+ HL-60 cells was (94.37±2.84)%, significantly higher than the (1.31±0.09)% in control group (P<0.01). The flow cytometry assay revealed that NSC67657 induced (76.46±2.83)% of G1/G0 phase arrest, significantly higher than that of (59.40±5.42)% in the control group (P<0.05), while the S phase cells were of (18.76±0.98)%, significantly lower than that of (34.38±2.61) % in the control group (P<0.05). The NSC67657 treatment also up-regulated the expression of ICAT mRNA and protein, and down-regulated the expression of β-catenin mRNA and protin (P<0.01 for all). However, the nuclear expression of β-catenin was down-regulated (P<0.01). The NSC67657 treatment induced nonsignificant alterations of TCF-4 mRNA, total protein and nuclear protein in the HL-60 cells (P>0.05 for all). The target genes of Wnt signaling pathway, including c-myc, cyclinD1 and TCF-1 mRNA and proteins in the HL-60 cells were significantly down-regulated after NSC67657 treatment (P<0.05). Conclusions The new steroidal drug NSC67657 induces monocytic differentiation of HL-60 cells, and down-regulates the expression of β-catenin and target genes of Wnt signaling pathway. These results indicate that Wnt signaling pathway may be directly or indirectly involved in the monocytic differentiation process of HL-60 cells.
ACCESSION #
115106938

 

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