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Anti-Tumor Effect of a Novel DOX/GA-CdTe QD was Mediated by Apoptotic and Autophagic Cell Death
Huaqin Zuo,Fan Wang,Di Zhou,Yi Zhou,Bing Chen,Jian Ouyang,Peipei Xu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.1
Burkitt's lymphoma is a highly proliferative B-cell malignancy characterized by MYC oncogene translocation. Intensive short-cycle chemotherapy could effectively improve the outcome of this disease. However, drug resistance limits the treatment of refractory/relapsed disease. Thus, we constructed and investigated a novel cadmium–tellurium quantum dot conjugated with doxorubicin and gambogic acid (DOX/GA-CdTe QDs) for cancer cell combined treatment in Raji, a Burkitt's lymphoma cell line. Results showed that DOX/GA-CdTe QDs could significantly improve anti-tumor effects compared with drugs alone in the Raji cell line. Flow cytometry, transmission electron micrographs and overexpression of Beclin1 and LC3 II/I showed that apoptosis and autophagy were involved in the process. However, DOX/GA-CdTe QDs did not cause cell cycle arrest, whereas DOX alone or combined with GA could cause apparent G2/M phase arrest. Hence, the novel DOX/GA-CdTe QDs offer a promising approach of drug delivery into cancer cells.
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Ying Jiang,Chaoyang Guan,Xu Liu,Yushan Wang,Huaqin Zuo,Tian Xia,Peipei Xu,Jian Ouyang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.1
Doxorubicin (DOX) plays an important part in lymphoma treatment. However, various side effects on normal tissues restrict its clinical use. Nanocarriers connected by Gly–Phe–Leu–Gly (GFLG) can be equipped with the advantages of nanoparticles (NPs), their enhanced permeability and retention (EPR) effect, and surface modifiability. Nanocarriers can also be specifically enzymatically hydrolyzed by cathepsin (Cath) B, a kind of enzyme highly expressed in tumor cells. In this work, we proposed a novel drug delivery system comprising GFLG conjugated with copper sulfide (CuS) NPs loaded with DOX. The system, designated as CuS-GFLG-DOX, could be used for NP-based targeted combination chemotherapy. Results showed that the drug delivery system had an appropriate diameter, good dispersibility, high encapsulation efficiency and high drug loading. The system also exhibited an excellent targeting of lymphoma cells and an enhanced antitumor activity. The possible pathway to induce cytotoxic effects was Bcl-2/caspase-mediated apoptosis pathway. In conclusion, CuS-GFLG-DOX could precisely deliver drugs to lymphoma cells and could be a novel and promising therapeutic option for lymphoma.
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