The
purpose of this study is to develop a new type of nanodrug
delivery material by modifying milk polar lipid (MPL) liposomes with
the S-layer protein. LIP-RLSFNP (MPL liposomes encapsulating RLSFNP
(Arg–Leu–Ser–Phe–Asn–Pro)) and
SLP-LIP-RLSFNP (S-layer protein-modified LIP-RLSFNP) were prepared
and characterized by transmission electron microscopy, Fourier transform
infrared spectroscopy, confocal laser scanning microscopy, surface
plasmon resonance, and mastersizer dynamic light scattering measurements.
The results showed that the S-layer protein could modify the surface
of MPL liposomes, stabilize the shape of the vesicles, and improve
the resistance to external interference. Furthermore, SLP-LIP-RLSFNP
showed better performance in in vitro and in vivo experiments compared with LIP-RLSFNP in terms of
promoting absorption and delayed release. The findings suggested that
MPL liposomes modified with the S-layer protein have potential for
use as an effective delivery system for therapeutic proteins and peptides.