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Comparison of photodynamic treatment produced cell damage between human breast cancer cell MCF-7 and its multidrug resistance cell.

Abstract：

BACKGROUND:Multidrug resistance (MDR) of breast cancer is a major obstacle in chemotherapy of cancer treatments. Recently the anti-tumor effects of Chlorin e6 (Ce6) mediated photodynamic therapy (Ce6-PDT) were reported in skin cancer and hepatoma in vitro. However, its therapeutic potential in killing human breast cancer especially those with MDR and the differences between MCF-7 and MCF-7/ADR after PDT treatment has not been fully investigated. METHODS:MTT assay was used to measure cell survival rate of MCF-7 cells and MCF-7/ADR cells. Intracellular reactive oxygen species (ROS) generation was measured by monitoring the fluorescence intensity of dichlorofluorescein (DCF) by flow cytometry. Nuclear morphology changes and DNA damage in both MCF-7 and MCF-7/ADR after Ce6-PDT were analyzed by hochest33342 staining and comet assay. Western blot and monodansylcadaverine (MDC) staining were used to monitor autophagic response in MCF-7/ADR. RESULTS:Ce6-PDT induced cell viability decrease, intracellular ROS generation, and DNA damage in concentration-dependent and cell-specific manner, and MCF-7 was more sensitive to Ce6-PDT than MCF-7/ADR cells at the same PDT condition. PDT treatment could trigger cell death via apoptosis in MCF-7 cells but autophagic cell death in MCF-7/ADR cells. CONCLUSION:These results suggested that MCF-7 was more sensitive to Ce6-PDT than MCF-7/ADR, and PDT treatment could trigger apoptotic response in MCF-7 cells, but stimulate autophagic response in MCF-7/ADR cells.

journal_name

Photodiagnosis Photodyn Ther

journal_title

Photodiagnosis and photodynamic therapy

authors

Wang H,Li L,Wang P,Wang X,Zhang K,Liu Q

doi

10.1016/j.pdpdt.2016.07.004

subject

Has Abstract

pub_date

2016-12-01 00:00:00

pages

1-8

eissn

1572-1000

issn

1873-1597

pii

S1572-1000(16)30129-6

journal_volume

16

pub_type

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