Volume 49, Issue 7 pp. 719-726
Basic Science

The sensitivity of glioma cells to pyropheophorbide-αmethyl ester-mediated photodynamic therapy is enhanced by inhibiting ABCG2

Li Pan MSc

Li Pan MSc

Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 P.R. China

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Haidan Lin MSc

Haidan Lin MSc

Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 P.R. China

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Si Tian MSc

Si Tian MSc

Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 P.R. China

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Dingqun Bai PhD

Corresponding Author

Dingqun Bai PhD

Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 P.R. China

Correspondence to: Dingqun Bai, PhD and Yuhan Kong, PhD, Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China. E-mail: [email protected] (DB); [email protected] (YK)

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Yuhan Kong PhD

Corresponding Author

Yuhan Kong PhD

Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 P.R. China

Correspondence to: Dingqun Bai, PhD and Yuhan Kong, PhD, Department of Rehabilitation Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China. E-mail: [email protected] (DB); [email protected] (YK)

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Lehua Yu PhD

Lehua Yu PhD

Department of Rehabilitation Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010 P.R. China

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First published: 29 March 2017
Citations: 13
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and and none were reported.
Where the work was done: Laboratory of Lipid and Glucose Metabolism, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P.R. China

Abstract

Background and Objective

To study the mechanisms of human glioblastoma cell resistance to methyl ester pyropheophorbide-a-mediated photodynamic therapy (MPPa-PDT) and the relationship between the cells and adenosine triphosphate-binding cassette superfamily G member 2 (ABCG2).

Study Design/Materials and Methods

The sensitivity of four human glioma cell lines (U87, A172, SHG-44, and U251) to MPPa-PDT was detected with a CCK-8 assay. Cell apoptosis, intracellular MPPa, and singlet oxygen were tested with flow cytometry. The mRNA and protein expression of ATP-binding cassette transporters (ABCG2, MRP1, and MDR1) were detected by PCR and Western blot, respectively.

Results

Both the sensitivity to MPPa-PDT and intracellular MPPa in A172 were the lowest among the four cell lines, while expression of ABCG2 mRNA and protein in A172 were the highest. The intracellular MPPa and ROS in A172 receiving MPPa-PDT significantly increased after using the ABCG2 inhibitor fumitremorgin C (FTC). Both cell viability and apoptosis in A172 cells undergoing MPPa-PDT were significantly improved with FTC.

Conclusions

ABCG2 plays a significant role in the resistance of A172 to MPPa-PDT. Lasers Surg. Med. 49:719–726, 2017. © 2017 Wiley Periodicals, Inc.

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