A Tumor-Specific Tissue-Penetrating Peptide Enhances the Efficacy of Chemotherapy Drugs in Gastric Cancer
Yonsei Medical Journal
;
: 595-601, 2018.
Article
in English
| WPRIM
| ID: wpr-715903
ABSTRACT
PURPOSE:
C-end rule (CendR) peptides are found to enhance the penetration of chemotherapeutic agents into tumor cells, while GX1 is a peptide that homes to gastric cancer (GC) vasculature. This study aimed to synthesize a novel peptide GX1-RPAKPAR (GXC) and to explore the effect of GXC on sensitizing GC cells to chemotherapeutic agents. MATERIALS ANDMETHODS:
Intracellular Adriamycin concentration analysis was applied to conform whether GXC peptide increases the penetration of chemotherapeutic agents into GC cells in vitro. The effect of GXC peptide on sensitizing GC cells to chemotherapeutics was validated by apoptosis assay and in vitro/vivo drug sensitivity assay. The specificity of GXC to GC tissue was validated by ex vivo fluorescence imaging.RESULTS:
In vitro, administration of GXC significantly increased Adriamycin concentrations inside SGC-7901 cells, and enhanced the efficacy of chemotherapeutic agents by decreasing the IC50 value. In vivo, FITC-GXC specifically accumulated in GC tissue. Moreover, systemic co-injection with GXC peptide and Adriamycin statistically improved the therapeutic efficacy in SGC-7901 xenograft models, surprisingly, without obviously increasing side effects.CONCLUSION:
These results demonstrated that co-administration of the novel peptide GXC with chemotherapeutic agents may be a potential way to enhance the efficacy of anticancer drugs in GC treatment.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Peptides
/
Stomach Neoplasms
/
In Vitro Techniques
/
Doxorubicin
/
Sensitivity and Specificity
/
Apoptosis
/
Inhibitory Concentration 50
/
Drug Therapy
/
Optical Imaging
/
Heterografts
Type of study:
Diagnostic study
Language:
English
Journal:
Yonsei Medical Journal
Year:
2018
Type:
Article
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