LyP-1-conjugated nanoparticles for targeting drug delivery to lymphatic metastatic tumors

作者：Luo, Guopei; Yu, Xianjun^*; Jin, Chen; Yang, Feng; Fu, Deliang; Long, Jiang; Xu, Jin; Zhan, Changyou; Lu, Weiyue

来源：International Journal of Pharmaceutics, 2010, 385(1-2): 150-156.

DOI：10.1016/j.ijpharm.2009.10.014

• PLGA
• PEG
• Nanoparticle
• Targeting
• Drug delivery
• Tumor
• Lymph metastasis

Active tumor targeting by biodegradable nanoparticles has been widely studied for cancer diagnosis and therapy. However, target-specific nanoparticles for drug delivery to lymphatic metastases have not been reported yet due to the lack of specific markers in the tumor lymphatics. Recently, peptide LyP-1 has been recognized for its specific home to tumors and their lymphatics. In this study, we tested the possibility of LyP-1 serving as a target-specific peptide of PEG-PLGA nanoparticles to tumor lymph metastases LyP-1 was synthesized by using Boc-protected amino acids The copolymers of maleimide-PEG-PLGA were formed by the conjugation of maleimide-PEG-NH2 to PLGA-COOH, which were applied to prepare pegylated nanoparticles with mPEG-PLGA by means of double emulsion/solvent evaporation technique. LyP-1 with sulfhydryl group was conjugated to the maleimide function located at the distal end of PEG surrounding the nanoparticle surface. LyP-1-conjugated PEG-PLGA nanoparticle (LyP-1-NPs) had a round and regular shape with a diameter around 90 nm. In vitro. cellular uptake of LyP-1-NPs was about four times of that of PEG-PLGA nanoparticles without LyP-1 (NPs). In vivo the uptake of LyP-1-NPs in metastasis, lymph nodes was about eight times of that of NPs. This study indicates that LyP-1-NP is a promising carrier for target-specific drug delivery to lymphatic metastatic tumors.

• 出版日期2010-1-29
• 单位复旦大学