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Objective To investigate the effects of quercetin on cell morphology, expression of promye-locytic leukemia (PML) mRNA and PML protein localization of NB4, HL-60 cells. Methods Cells mor-phology assayed by Wright’ s stain, fluorescence stain, and PML mRNA expression by RT-PCR, PML protein localization by immuno-fluorescence. Results The typical apoptosis was found in NB4 and HL-60 cells after treatment with quercetin. Immuno-fluorescence analysis showed after treatment with quercetin, the fusion pro-tein disappeared in NB4 cells, PML protein relocated, then degraded, and that also seen in HL-60 cells. The expression of PML mRNA is not changed in quercetin-treated cells. Conclusion PML play the role of apop-tosis inducer in leukemia cells at the translational level, quercetin can inhibit the proliferation of leukemia cells, and induce NB4, HL-60 cells apoptosis.
Objective To investigate the effects of quercetin on cell morphology, expression of promye-locy leukemia (PML) mRNA and PML protein localization of NB4, HL-60 cells. Methods Cells mor-phology assayed by Wright’s stain, fluorescence stain, and PML The mRNA expression by RT-PCR, PML protein localization by immuno-fluorescence. Results The typical apoptosis was found in NB4 and HL-60 cells after treatment with quercetin. Immuno-fluorescence analysis showed after treatment with quercetin, the fusion pro-tein disappeared in NB4 cells, PML protein relocated, then degraded, and that also seen in HL-60 cells. The expression of PML mRNA is not changed in quercetin-treated cells. Conclusion PML play the role of apop-tosis inducer in leukemia cells at the translational Level, quercetin can inhibit the proliferation of leukemia cells, and induce NB4, HL-60 cells apoptosis.