Unknown

Dataset Information

0

Inhibition of Autophagy with Chloroquine Enhanced Sinoporphyrin Sodium Mediated Photodynamic Therapy-induced Apoptosis in Human Colorectal Cancer Cells.


ABSTRACT: To evaluate the antitumor effect of sinoporphyrin sodium mediated photodynamic therapy (DVDMS-PDT) against human colorectal cancer (CRC) and to investigate the role of autophagy in its effect. Shrunken cells, condensed nuclei and increased levels of cleaved caspase-3 and Bax were observed in DVDMS-PDT treated HCT116 cells, reminiscent of apoptosis. DVDMS-PDT showed better antitumor efficiency in HCT116 cells than Photofrin mediated photodynamic therapy (PF-PDT) both in vitro and in vivo. And DVDMS-PDT caused autophagic characteristics: double membrane autophagosome structures and changes in autophagy-related protein expression (ATG7, P62, Bcl-2 and LC3-Ⅱ). In addition, inhibition of autophagy by chloroquine (CQ) promoted apoptosis, suggesting a possible protective role of autophagy in DVDMS-PDT-treated HCT116 cells, which was proved by flow cytometry and western blotting. The results of xenograft mouse model showed markedly increased apoptosis and significantly reduced tumor size in DVDMS-PDT treated group than Control, and DVDMS-PDT exhibited better antitumor efficiency than PF-PDT. Further, no visible tumor was observed in the CQ+DVDMS-PDT group at the end of the xenograft mouse experiment, which confirmed the hypothesis that autophagy was protective to DVDMS-PDT treated HCT116 cells. Our findings suggest that DVDMS is a promising photosensitizer and the combined use of autophagy inhibitor can remarkably enhance the DVDMS-PDT mediated anti-cancer efficiency in HCT116 cells both in vitro and in vivo.

SUBMITTER: Zhu B 

PROVIDER: S-EPMC6329935 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4280503 | biostudies-literature
| S-EPMC7448408 | biostudies-literature
| S-EPMC4203546 | biostudies-literature
| S-EPMC4402500 | biostudies-literature
| S-EPMC7565722 | biostudies-literature
| S-EPMC9733382 | biostudies-literature
| S-EPMC4718706 | biostudies-literature
| S-EPMC4944202 | biostudies-literature
| S-EPMC5260901 | biostudies-literature
| S-EPMC6203262 | biostudies-literature