chlorophyll-a has been researched along with Bile-Duct-Neoplasms* in 3 studies
1 review(s) available for chlorophyll-a and Bile-Duct-Neoplasms
1 trial(s) available for chlorophyll-a and Bile-Duct-Neoplasms
2 other study(ies) available for chlorophyll-a and Bile-Duct-Neoplasms
Article | Year |
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Gemcitabine-loaded DSPE-PEG-PheoA liposome as a photomediated immune modulator for cholangiocarcinoma treatment.
To improve the therapeutic efficacy of gemcitabine (GEM) as an anticancer drug for bile duct cancer, GEM-loaded liposomes (GDPPL) prepared from a photosensitizer-conjugated lipid were investigated regarding the drug release kinetics, photodynamic therapy (PDT) efficacy, and immunomodulatory effects. The release rate of GEM from the liposomes was improved approximately 2-fold compared to non-laser irradiation groups due to lipid disruption by reactive oxygen species produced from the activated photosensitizer upon laser irradiation. Through in vitro testing using a human liver bile duct carcinoma cell line (HuCCT-1), the cytotoxicity of GDPPL with laser irradiation was enhanced due to rapid GEM release and PDT effects. Furthermore, the results of in vivo tests using a HuCCT-1 tumor-bearing xenograft mice model showed that GDPPL exhibited approximately 3-fold antitumoral effects compared to control group. Additionally, immunohistochemical analysis demonstrated the recruitment of immunostimulatory cells in tumor tissues. IHC tests in BALB/c mice indicated that GDPPL under laser irradiation dramatically enhanced the quantities of various immune cells for effective antitumoral immunotherapy against biliary tract cancer. From these results, it was concluded that GDPPL with rapid drug release behavior, PDT efficacy, and immunomodulatory effects upon laser irradiation has potential as an antitumor therapeutic agent for biliary tract cancer. Topics: Animals; Antineoplastic Agents; Bile Duct Neoplasms; Cell Line, Tumor; Cell Survival; Chlorophyll; Cholangiocarcinoma; Combined Modality Therapy; Deoxycytidine; Gemcitabine; Heterografts; Humans; Immunomodulation; Lasers; Liposomes; Mice, Inbred BALB C; Mice, Nude; Phosphatidylethanolamines; Photochemotherapy; Photosensitizing Agents; Polyethylene Glycols | 2018 |
Preparation of a chlorophyll derivative and investigation of its photodynamic activities against cholangiocarcinoma.
Photodynamic therapy (PDT) is emerging as a promising method for the treatment of various cancer diseases. However, the clinical application of PDT is limited due to the lack of effective photosensitizers. In this study, a novel chlorophyll derivative, N,N-bis(2-carboxyethyl)pyropheophorbide a (BPPA), had been synthesized and characterized. BPPA had a characteristic long wavelength absorption peak at 669nm and a singlet oxygen quantum yield of 0.54. To investigate the photodynamic ability of BPPA against cholangiocarcinoma (CCA), cellular uptake, subcellular location and bio-distribution, in vitro and in vivo PDT efficacy of BPPA were studied. The results showed that BPPA could rapidly accumulate in QBC-939 cells and localize in the cytoplasm. BPPA- PDT was effective in reducing the cell viability in a drug dose- and light dose-dependent manner in vitro. In CCA xenograft nude mouse model, the concentration of BPPA in the plasma lowered rapidly, and the fluorescence signal peaked at 0.5h and 2h after injection in the skin and tumor, respectively. Significant quantities could be observed in the tumor. BPPA followed by irradiation could significantly inhibit growth of tumors, and histological examination revealed necrotic damage in PDT-treated tumors. These results suggested that BPPA could be a promising drug candidate for photodynamic therapy in cholangiocarcinoma. Topics: Animals; Bile Duct Neoplasms; Cell Line, Tumor; Cell Survival; Chlorophyll; Cholangiocarcinoma; Dose-Response Relationship, Drug; Female; Humans; Mice; Mice, Inbred BALB C; Mice, Nude; Photochemotherapy; Photosensitizing Agents; Random Allocation; Xenograft Model Antitumor Assays | 2017 |