Adjuvant therapy with stattic enriches the anti-proliferative effect of doxorubicin in human ZR-75-1 breast cancer cells via arresting cell cycle and inducing apoptosis - 09/12/18
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Highlights |
• | Adjuvant therapy has been emerged to overcome drug toxicity through diminishing of the drugs side effects. |
• | Stattic is one of the first small molecules recognized to limit STAT3 activity through dimerization process. |
• | The implement of stattic triggered anti-proliferative and apoptotic behavior of doxorubicin on ZR-75-1 breast cancer cells. |
• | The interactive effects of stattic and doxorubicin in ZR-75-1 breast cancer cell line have strong synergism. |
Abstract |
Adjuvant therapy with novel and effective component has been presented as a contrivance in breast cancer treatment versus the conventional methods. The current research was done to evaluate the implement of stattic, specific STAT3 inhibitor on the anti-proliferative and apoptotic behavior of doxorubicin on ZR-75-1 breast cancer cells. Cell viability was investigated by MTT assay, the percentage of apoptosis by DAPI staining, and Annexin V. Real Time-PCR was applied to find out the correlation between mechanistic roles of the STAT3 pathway and apoptotic signal in the modulation of Bcl-2 and Bax gene expressions axis. The IC50 values for doxorubicin and stattic were 2.5 ± 0.18 μM and 3.5 ± 0.28 μM, respectively. Combination index (CI) value for ZR-75-1 breast cancer was 0.72, which indicated a strong synergistic effect. Incubation of the cells with a combination of stattic and doxorubicin revealed a significant increase in growth inhibitory effect of doxorubicin with more than 50% decrease in proliferation rate and a two-fold increase in the percentage of apoptotic cells. Assessment of gene expression levels demonstrated a visible decrease in antiapoptotic Bcl-2 and Bcl-xl accompanied by an increase in pro-apoptotic Bax mRNA levels (p < 0.05). Taken together, our results show that combination of a STAT3 inhibitor and doxorubicin can be figured out as a promising approach for dealing of patients with breast cancers.
Le texte complet de cet article est disponible en PDF.Keywords : Apoptosis, Adjuvant therapy, Combination index, Doxorubicin, Stattic
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Vol 109
P. 1240-1248 - janvier 2019 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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