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Sequential delivery of an anticancer drug and combined immunomodulatory nanoparticles for efficient chemoimmunotherapy.

Heo MB, Kim SY, Yun WS, Lim YT - Int J Nanomedicine (2015)

Bottom Line: However, CpG ODNs also induced the secretion of interleukin-10 (IL-10) that reduces the Th1 response and enhances the T helper 2 (Th2) response.Treatment of BMDCs with both types of PLGA NPs increased the Th1/Th2 cytokine (IL-12/IL-10) expression ratio, which is important for the effective induction of an antitumor immune response.After primary injection with the HA/PTX complex, the tumor-associated antigen was generated and taken up by tumor-recruited BMDCs.

View Article: PubMed Central - PubMed

Affiliation: SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea ; Center for Nanosafety Metrology, Division of Convergence Technology, Korea Research Institute of Standards and Science, Daejeon, Republic of Korea.

ABSTRACT
Chemoimmunotherapy combines chemotherapy based on anticancer drugs with immunotherapy based on immune activators to eliminate or inhibit the growth of cancer cells. In this study, water-insoluble paclitaxel (PTX) was dispersed in water using hyaluronic acid (HA) to generate a tumor-associated antigen in the tumor microenvironment. Cytosine-phosphate-guanosine oligodeoxynucleotides (CpG ODNs) were used to enhance the T helper (Th) 1 immune response. However, CpG ODNs also induced the secretion of interleukin-10 (IL-10) that reduces the Th1 response and enhances the T helper 2 (Th2) response. Therefore, RNA interference was used to downregulate IL-10 secretion from bone marrow-derived den-dritic cells (BMDCs). For the combined immunomodulation of BMDCs, we fabricated two types of poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) containing CpG ODNs to activate BMDCs via Toll-like receptor 9 (CpG ODN-encapsulated PLGA NPs, PCNs) or a small interfering RNA to silence IL-10 (IL-10 small interfering RNA-encapsulated PLGA NPs, PINs). Treatment of BMDCs with both types of PLGA NPs increased the Th1/Th2 cytokine (IL-12/IL-10) expression ratio, which is important for the effective induction of an antitumor immune response. After primary injection with the HA/PTX complex, the tumor-associated antigen was generated and taken up by tumor-recruited BMDCs. After a secondary injection with immunomodulating PCNs and PINs, the BMDCs became activated and migrated to the tumor-draining lymph nodes. As a result, the combination of chemotherapy using the HA/PTX complex and immunotherapy using PCNs and PINs not only efficiently inhibited tumor growth but also increased the animal survival rate. Taken together, our results suggest that the sequential treatment of cancer cells with a chemotherapeutic agent and immunomodulatory nanomaterials represents a promising strategy for efficient cancer therapy.

No MeSH data available.


Related in: MedlinePlus

Digital images of PTX dispersed in distilled water (DW) and in aqueous HA solution.Abbreviations: PTX, paclitaxel; HA, hyaluronic acid.
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f2-ijn-10-5981: Digital images of PTX dispersed in distilled water (DW) and in aqueous HA solution.Abbreviations: PTX, paclitaxel; HA, hyaluronic acid.

Mentions: In this study, a low dose of the anticancer drug PTX was dispersed in water with the aid of HA. We examined whether treatment with this complex combined with immunostimulatory NPs exerted a synergistic effect against solid tumors. PTX was dispersed in aqueous solutions for an extended period using the HA matrix. However, PTX that was dispersed in DW alone aggregated and sedimented due to its hydrophobicity (Figure 2). Based on our previous results,36 we prepared the HA/PTX complex for the injection of 200 µg of PTX per mouse, resulting in weak anticancer activity.


Sequential delivery of an anticancer drug and combined immunomodulatory nanoparticles for efficient chemoimmunotherapy.

Heo MB, Kim SY, Yun WS, Lim YT - Int J Nanomedicine (2015)

Digital images of PTX dispersed in distilled water (DW) and in aqueous HA solution.Abbreviations: PTX, paclitaxel; HA, hyaluronic acid.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4590313&req=5

f2-ijn-10-5981: Digital images of PTX dispersed in distilled water (DW) and in aqueous HA solution.Abbreviations: PTX, paclitaxel; HA, hyaluronic acid.
Mentions: In this study, a low dose of the anticancer drug PTX was dispersed in water with the aid of HA. We examined whether treatment with this complex combined with immunostimulatory NPs exerted a synergistic effect against solid tumors. PTX was dispersed in aqueous solutions for an extended period using the HA matrix. However, PTX that was dispersed in DW alone aggregated and sedimented due to its hydrophobicity (Figure 2). Based on our previous results,36 we prepared the HA/PTX complex for the injection of 200 µg of PTX per mouse, resulting in weak anticancer activity.

Bottom Line: However, CpG ODNs also induced the secretion of interleukin-10 (IL-10) that reduces the Th1 response and enhances the T helper 2 (Th2) response.Treatment of BMDCs with both types of PLGA NPs increased the Th1/Th2 cytokine (IL-12/IL-10) expression ratio, which is important for the effective induction of an antitumor immune response.After primary injection with the HA/PTX complex, the tumor-associated antigen was generated and taken up by tumor-recruited BMDCs.

View Article: PubMed Central - PubMed

Affiliation: SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea ; Center for Nanosafety Metrology, Division of Convergence Technology, Korea Research Institute of Standards and Science, Daejeon, Republic of Korea.

ABSTRACT
Chemoimmunotherapy combines chemotherapy based on anticancer drugs with immunotherapy based on immune activators to eliminate or inhibit the growth of cancer cells. In this study, water-insoluble paclitaxel (PTX) was dispersed in water using hyaluronic acid (HA) to generate a tumor-associated antigen in the tumor microenvironment. Cytosine-phosphate-guanosine oligodeoxynucleotides (CpG ODNs) were used to enhance the T helper (Th) 1 immune response. However, CpG ODNs also induced the secretion of interleukin-10 (IL-10) that reduces the Th1 response and enhances the T helper 2 (Th2) response. Therefore, RNA interference was used to downregulate IL-10 secretion from bone marrow-derived den-dritic cells (BMDCs). For the combined immunomodulation of BMDCs, we fabricated two types of poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) containing CpG ODNs to activate BMDCs via Toll-like receptor 9 (CpG ODN-encapsulated PLGA NPs, PCNs) or a small interfering RNA to silence IL-10 (IL-10 small interfering RNA-encapsulated PLGA NPs, PINs). Treatment of BMDCs with both types of PLGA NPs increased the Th1/Th2 cytokine (IL-12/IL-10) expression ratio, which is important for the effective induction of an antitumor immune response. After primary injection with the HA/PTX complex, the tumor-associated antigen was generated and taken up by tumor-recruited BMDCs. After a secondary injection with immunomodulating PCNs and PINs, the BMDCs became activated and migrated to the tumor-draining lymph nodes. As a result, the combination of chemotherapy using the HA/PTX complex and immunotherapy using PCNs and PINs not only efficiently inhibited tumor growth but also increased the animal survival rate. Taken together, our results suggest that the sequential treatment of cancer cells with a chemotherapeutic agent and immunomodulatory nanomaterials represents a promising strategy for efficient cancer therapy.

No MeSH data available.


Related in: MedlinePlus