Controlled release and targeting of polypeptide-deposited liposomes by enzymatic degradation

Yuuka Fukui, Hikari Otsuka, Keiji Fujimoto

研究成果: Article

抜粋

We prepared biobased nanocapsules with enzymatic degradability, which were generated by the layer-by-layer deposition of enzymes and polypeptide over the liposomal surface. Here, we demonstrate two different systems based on the enzymatic degradation of polymer layers. First, the deposition of trypsin and polyarginine (PArg), which is cleavable by trypsin, was carried out over a negatively charged liposome. The enzymatic cleavage of PArg resulted in exposure of the lipid membrane, which facilitated release of the cargo. Next, we attempted to degrade the outer polymer layer of the multilayered capsule wall to display the inner polymer layer by enzymatic degradation. This approach enabled the accumulation and targeting of the nanocapsules through the affinity between the displayed polymer layer and the target hydroxyapatite (HAp). The polymer wall was constructed with an inner layer consisting of poly-L-glutamic acid (PGlu) and an outer layer consisting of trypsin and PArg onto the liposome. The degradation of the outer PArg by trypsin allowed the surface to display the inner PGlu, which has bone-targeting ability. In addition, the polymer wall was constructed from an inner layer of PArg and an outer layer of pepsin and PGlu. The degradation of the outer PGlu by pepsin led to inner PArg on the surface to achieve cell-penetrating activity.

元の言語English
ページ(範囲)1223-1230
ページ数8
ジャーナルPolymer Journal
51
発行部数11
DOI
出版物ステータスPublished - 2019 11 1

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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