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Potentiating antilymphoma efficacy of chemotherapy using a liposome for integration of CD20 targeting, ultra-violet irradiation polymerizing, and controlled drug delivery.

Wu C, Li H, Zhao H, Zhang W, Chen Y, Yue Z, Lu Q, Wan Y, Tian X, Deng A - Nanoscale Res Lett (2014)

Bottom Line: Our experimental results demonstrated that after the UV irradiation, the liposomes exhibit better serum stability and slower drug release with a decreased mean diameter of approximately 285 nm.The cellular uptake of adriamycin (ADR) by this Fab-navigated liposome was about four times of free drugs.With the high serum stability, finely regulated structure, active targeting strategy via antigen-antibody reaction and passive targeting strategy via enhanced permeability and retention (EPR) effect, our liposome exhibits durable and potent antitumor activities both in the disseminated and localized human NHL xeno-transplant models.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Laboratory Diagnosis, Changhai Hospital affiliated to the Second Military Medical University, 168 Changhai Road, Shanghai 200433, China.

ABSTRACT
Unlike most malignancies, chemotherapy but not surgery plays the most important role in treating non-Hodgkin lymphoma (NHL). Currently, liposomes have been widely used to encapsulate chemotherapeutic drugs in treating solid tumors. However, higher in vivo stability owns a much more important position for excellent antitumor efficacy in treating hematological malignancies. In this study, we finely fabricated a rituximab Fab fragment-decorated liposome based on 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DC8,9PC), which can form intermolecular cross-linking through the diacetylenic group by ultra-violet (UV) irradiation. Our experimental results demonstrated that after the UV irradiation, the liposomes exhibit better serum stability and slower drug release with a decreased mean diameter of approximately 285 nm. The cellular uptake of adriamycin (ADR) by this Fab-navigated liposome was about four times of free drugs. Cytotoxicity assays against CD20(+) lymphoma cells showed that the half maximal (50%) inhibitory concentration (IC50) of ADR-loaded immunoliposome was only one fourth of free ADR at the same condition. In vivo studies were evaluated in lymphoma-bearing SCID mice. With the high serum stability, finely regulated structure, active targeting strategy via antigen-antibody reaction and passive targeting strategy via enhanced permeability and retention (EPR) effect, our liposome exhibits durable and potent antitumor activities both in the disseminated and localized human NHL xeno-transplant models.

No MeSH data available.


Related in: MedlinePlus

In vitro antitumor activity of ADR loaded liposomes. Concentration-dependent cytotoxicity evaluation of free ADR, rituximab Fab, PC-ADR-BSA, and PC-ADR-Fab in Raji cells (A) and Daudi cells (B). (C) The IC50 to Raji and Daudi cells of free ADR, PC-ADR-BSA, and PC-ADR-Fab.
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Figure 5: In vitro antitumor activity of ADR loaded liposomes. Concentration-dependent cytotoxicity evaluation of free ADR, rituximab Fab, PC-ADR-BSA, and PC-ADR-Fab in Raji cells (A) and Daudi cells (B). (C) The IC50 to Raji and Daudi cells of free ADR, PC-ADR-BSA, and PC-ADR-Fab.

Mentions: The in vitro antitumor activities of our liposomes were subsequently evaluated. After the incubation of Raji and Daudi cells with different concentrations of free ADR, rituximab Fab fragments, PC-ADR-BSA, and PC-ADR-Fab for 48 h, a CCK-8 assay was employed to determine the cell viability. As illustrated in Figure 5A,B, both Raji and Daudi cells showed a significantly lower cell viability after the treatment of drug-loaded liposomes compared with free ADR, while PC-ADR-Fab exhibited more potent antitumor activity compared with PC-ADR-BSA in all the tested ADR concentrations. Because the therapeutic effects of rituximab is largely dependent on the Fc-related antibody-dependent cell-mediated cytotoxicity (ADCC) and complement dependent cytotoxicity (CDC) [36], the Fab fragments demonstrated low cytotoxicity in both Raji and Daudi cells in all the tested concentrations (0.005 to 1.3 μg/mL), which corresponded to the ADR concentrations in the liposomal system. Furthermore, the half maximal (50%) inhibitory concentration (IC50) of ADR was calculated to evaluate the cytotoxicity of the liposomal drug delivery systems according to the ADR concentration dependence of the cell viability profile. It was shown in Figure 5C that PC-ADR-Fab demonstrated the lowest IC50 to Raji (0.103 μg/mL) and Daudi (0.094 μg/mL) cells compared with PC-ADR-BSA (IC50Raji 0.208 μg/mL, IC50Daudi 0.229 μg/mL) and free ADR agents (IC50Raji 0.436 μg/mL, IC50Daudi 0.441 μg/mL).


Potentiating antilymphoma efficacy of chemotherapy using a liposome for integration of CD20 targeting, ultra-violet irradiation polymerizing, and controlled drug delivery.

Wu C, Li H, Zhao H, Zhang W, Chen Y, Yue Z, Lu Q, Wan Y, Tian X, Deng A - Nanoscale Res Lett (2014)

In vitro antitumor activity of ADR loaded liposomes. Concentration-dependent cytotoxicity evaluation of free ADR, rituximab Fab, PC-ADR-BSA, and PC-ADR-Fab in Raji cells (A) and Daudi cells (B). (C) The IC50 to Raji and Daudi cells of free ADR, PC-ADR-BSA, and PC-ADR-Fab.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4151082&req=5

Figure 5: In vitro antitumor activity of ADR loaded liposomes. Concentration-dependent cytotoxicity evaluation of free ADR, rituximab Fab, PC-ADR-BSA, and PC-ADR-Fab in Raji cells (A) and Daudi cells (B). (C) The IC50 to Raji and Daudi cells of free ADR, PC-ADR-BSA, and PC-ADR-Fab.
Mentions: The in vitro antitumor activities of our liposomes were subsequently evaluated. After the incubation of Raji and Daudi cells with different concentrations of free ADR, rituximab Fab fragments, PC-ADR-BSA, and PC-ADR-Fab for 48 h, a CCK-8 assay was employed to determine the cell viability. As illustrated in Figure 5A,B, both Raji and Daudi cells showed a significantly lower cell viability after the treatment of drug-loaded liposomes compared with free ADR, while PC-ADR-Fab exhibited more potent antitumor activity compared with PC-ADR-BSA in all the tested ADR concentrations. Because the therapeutic effects of rituximab is largely dependent on the Fc-related antibody-dependent cell-mediated cytotoxicity (ADCC) and complement dependent cytotoxicity (CDC) [36], the Fab fragments demonstrated low cytotoxicity in both Raji and Daudi cells in all the tested concentrations (0.005 to 1.3 μg/mL), which corresponded to the ADR concentrations in the liposomal system. Furthermore, the half maximal (50%) inhibitory concentration (IC50) of ADR was calculated to evaluate the cytotoxicity of the liposomal drug delivery systems according to the ADR concentration dependence of the cell viability profile. It was shown in Figure 5C that PC-ADR-Fab demonstrated the lowest IC50 to Raji (0.103 μg/mL) and Daudi (0.094 μg/mL) cells compared with PC-ADR-BSA (IC50Raji 0.208 μg/mL, IC50Daudi 0.229 μg/mL) and free ADR agents (IC50Raji 0.436 μg/mL, IC50Daudi 0.441 μg/mL).

Bottom Line: Our experimental results demonstrated that after the UV irradiation, the liposomes exhibit better serum stability and slower drug release with a decreased mean diameter of approximately 285 nm.The cellular uptake of adriamycin (ADR) by this Fab-navigated liposome was about four times of free drugs.With the high serum stability, finely regulated structure, active targeting strategy via antigen-antibody reaction and passive targeting strategy via enhanced permeability and retention (EPR) effect, our liposome exhibits durable and potent antitumor activities both in the disseminated and localized human NHL xeno-transplant models.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Laboratory Diagnosis, Changhai Hospital affiliated to the Second Military Medical University, 168 Changhai Road, Shanghai 200433, China.

ABSTRACT
Unlike most malignancies, chemotherapy but not surgery plays the most important role in treating non-Hodgkin lymphoma (NHL). Currently, liposomes have been widely used to encapsulate chemotherapeutic drugs in treating solid tumors. However, higher in vivo stability owns a much more important position for excellent antitumor efficacy in treating hematological malignancies. In this study, we finely fabricated a rituximab Fab fragment-decorated liposome based on 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DC8,9PC), which can form intermolecular cross-linking through the diacetylenic group by ultra-violet (UV) irradiation. Our experimental results demonstrated that after the UV irradiation, the liposomes exhibit better serum stability and slower drug release with a decreased mean diameter of approximately 285 nm. The cellular uptake of adriamycin (ADR) by this Fab-navigated liposome was about four times of free drugs. Cytotoxicity assays against CD20(+) lymphoma cells showed that the half maximal (50%) inhibitory concentration (IC50) of ADR-loaded immunoliposome was only one fourth of free ADR at the same condition. In vivo studies were evaluated in lymphoma-bearing SCID mice. With the high serum stability, finely regulated structure, active targeting strategy via antigen-antibody reaction and passive targeting strategy via enhanced permeability and retention (EPR) effect, our liposome exhibits durable and potent antitumor activities both in the disseminated and localized human NHL xeno-transplant models.

No MeSH data available.


Related in: MedlinePlus