Effect of marine sponge-derived smenospongine on apoptosis in breast cancer MCF7 cells

TANG Jie; LIN Houwen; SUN Fan

doi:10.3969/j.issn.1006-0111.2018.05.004

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Objective To investigate the potential effect of marine sponge-derived smenospongine (Sme) on apoptosis in breast cancer MCF7 cells. Methods The CCK-8 method was used to detect growth-inhibitory effect of Sme against MCF7 cells. Flow cytometry was used to evaluate the mitochondrial membrane potential and apoptosis. Changes in nuclear morphology of apoptotic cells were assessed by DAPI staining. Western blotting was used to detect the expression of Bax, Bcl2, cytochorome C, p38 and p-p38. Results Sme exhibited suppressive effect on the proliferation of MCF7 cells, with IC₅₀ value of (16.46±0.88) μmol/L. DAPI staining and Annexin V-FITC/PI double staining revealed that Sme significantly induced apoptosis. The apoptosis rate was increased rapidly from 4.18% to 21.49% with the raise of Sme concentration. Further study showed that mitochondrial membrane potential decreased after Sme incubation. Western blotting analysis displayed that the expression of Bax was increased and the expression of Bcl2 was decreased, which resulted in the release of cytochorome C. Meanwhile, the phosphorylated level of p38 was significantly elevated. Conclusion Sme inhibited the proliferation of MCF7 cells and might activate intrinsic apoptosis through p38 MAPK pathway.

Effect of marine sponge-derived smenospongine on apoptosis in breast cancer MCF7 cells

Department of Pharmacy, Renji Hospital Affiliated to School of Medicine, Shanghai Jiao tong University, Shanghai 200127, China

Received Date: 2018-03-28

Rev Recd Date: 2018-05-11

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Abstract: Objective To investigate the potential effect of marine sponge-derived smenospongine (Sme) on apoptosis in breast cancer MCF7 cells. Methods The CCK-8 method was used to detect growth-inhibitory effect of Sme against MCF7 cells. Flow cytometry was used to evaluate the mitochondrial membrane potential and apoptosis. Changes in nuclear morphology of apoptotic cells were assessed by DAPI staining. Western blotting was used to detect the expression of Bax, Bcl2, cytochorome C, p38 and p-p38. Results Sme exhibited suppressive effect on the proliferation of MCF7 cells, with IC₅₀ value of (16.46±0.88) μmol/L. DAPI staining and Annexin V-FITC/PI double staining revealed that Sme significantly induced apoptosis. The apoptosis rate was increased rapidly from 4.18% to 21.49% with the raise of Sme concentration. Further study showed that mitochondrial membrane potential decreased after Sme incubation. Western blotting analysis displayed that the expression of Bax was increased and the expression of Bcl2 was decreased, which resulted in the release of cytochorome C. Meanwhile, the phosphorylated level of p38 was significantly elevated. Conclusion Sme inhibited the proliferation of MCF7 cells and might activate intrinsic apoptosis through p38 MAPK pathway.

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Reference (16)

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Effect of marine sponge-derived smenospongine on apoptosis in breast cancer MCF7 cells

doi: 10.3969/j.issn.1006-0111.2018.05.004

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