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1.
Zhongguo Shi Yan Xue Ye Xue Za Zhi ; 25(3): 736-742, 2017 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-28641627

RESUMO

OBJECTIVE: To explore the mechanism of apoptosis for resvertrol-mediated reversing the drug-resistance of AML HL-60/ADR cells. METHODS: The HL-60/ADR cells were divided into 4 groups: control group, adriamycin (ADR)-treated group, resveratrol(Res)-treated group and ADR+Res-treated group. The inhibitory rate of cell proliferation was analyzed by CCK-8 method. The auto-fluorescence intensity of intracellular ADR and the apoptotic rate of HL-60/ADR cells were detected by flow cytometry. The mRNA expression levels of multidrug-resistance associated protein-1(MRP1), anti-apoptotic gene BCL-2 and pro-apoptotic gene BAX were analyzed by real-time fluorescence quantitative RT-PCR. The protein expression levels of MRP1, BCL-2 and BAX were detected by Western blot. RESULTS: The maximal inhibition rates of cell proliferation were 44%, 61%, 76% and 81%, respectively in different concentration of Res (25, 50, 100, 200 µmol/L) and with concentration-dependent manner(r=0.876, P<0.05). Compared with ADR group (IC50: 8.534±1.111 µmol/L), the half inhibitory concentration (IC50) of HL-60/ADR cells [(1.591±0.373) µmol/L] decreased significantly in ADR+Res group(P<0.05). The auto-fluorescence intensity of ADR in HL-60/ADR cells of ADR+Res group increased significantly (P<0.05). The apoptotic rate of HL-60/ADR cells in Res or ADR+Res group increased significantly (P<0.05). The mRNA expression levels of MRP1 and Bcl-2 in Res or ADR+Res groups decreased and BAX increased significantly (P<0.05). The protein expression levels of MRP1 and BCL-2 were decreased, BAX increased significantly in Res or ADR+Res group (P<0.05). CONCLUSION: Resveratrol shows the effect of reversing the drug resisitance of HL-60/ADR cells in acute myeloid leukemia, possibly via promoting the apoptosis of HL-60/ADR cells and inhibiting the expression of MRP1, which may be related with the inhibition of BCL-2 expression and the promotion of BAX expression.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Apoptose/efeitos dos fármacos , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Leucemia Promielocítica Aguda/tratamento farmacológico , Estilbenos/farmacologia , Doxorrubicina/farmacologia , Resistencia a Medicamentos Antineoplásicos/genética , Células HL-60 , Humanos , Resveratrol
2.
J Biochem Mol Toxicol ; 28(4): 181-9, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24488958

RESUMO

Cigarette smoking is known to have negative effects on tissue repair and healing. The aim of this study is to investigate the effects of nicotine in human umbilical cord mesenchymal stem cells (MSCs). After nicotine treatment, MSCs became pyknotic, vacuoles appeared in the cytoplasm and nucleus, and the nuclear boundary became fuzzy as observed using atomic force microscopy. Cell proliferation was inhibited in a dose-dependent manner (P < 0.05 for all concentrations). The proportion of apoptotic MSCs was significantly increased in a dose-dependent manner. The mitochondrial membrane potential was significantly decreased (P < 0.05). Nicotine-treated MSCs had a significantly higher G0/G1 ratio (P < 0.05). Peptide mass fingerprinting identified 27 proteins that were differentially expressed between MSCs with and without nicotine treatment. These nicotine exerted toxic effects on MSCs are likely related, at least in part, to the altered expression of multiple proteins that are essential to the health and proliferation of these cells.


Assuntos
Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Células-Tronco Mesenquimais/fisiologia , Nicotina/toxicidade , Apoptose/efeitos dos fármacos , Forma Celular/efeitos dos fármacos , Células Cultivadas , Regulação para Baixo/efeitos dos fármacos , Humanos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Células-Tronco Mesenquimais/efeitos dos fármacos , Proteoma/metabolismo , Cordão Umbilical/citologia
3.
BMC Cell Biol ; 12: 32, 2011 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-21827650

RESUMO

BACKGROUND: The therapeutic efficacy of human mesenchymal stem cells (hMSCs) for the treatment of hypoxic-ischemic diseases is closely related to level of hypoxia in the damaged tissues. To elucidate the potential therapeutic applications and limitations of hMSCs derived from human umbilical cords, the effects of hypoxia on the morphology and proliferation of hMSCs were analyzed. RESULTS: After treatment with DFO and CoCl2, hMSCs were elongated, and adjacent cells were no longer in close contact. In addition, vacuole-like structures were observed within the cytoplasm; the rough endoplasmic reticulum expanded, and expanded ridges were observed in mitochondria. In addition, DFO and CoCl2 treatments for 48 h significantly inhibited hMSCs proliferation in a concentration-dependent manner (P < 0.05). This treatment also increased the number of cells in G0/G1 phase and decreased those in G2/S/M phase. CONCLUSIONS: The hypoxia-mimetic agents, DFO and CoCl2, alter umbilical cord-derived hMSCs morphology and inhibit their proliferation through influencing the cell cycle.


Assuntos
Compostos Aza/farmacologia , Proliferação de Células , Cobalto/farmacologia , Células-Tronco Mesenquimais/efeitos dos fármacos , Cordão Umbilical/citologia , Diferenciação Celular , Hipóxia Celular , Células Cultivadas , Citometria de Fluxo , Humanos , Células-Tronco Mesenquimais/citologia , Células-Tronco Mesenquimais/metabolismo , Cordão Umbilical/metabolismo
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