In silico identification and experimental validation of cellular uptake by a new cell penetrating peptide P1 derived from MARCKS.

Abstract:

:Viral vectors for vaccine delivery are challenged by recently reported safety issues like immunogenicity and risk for cancer development, and thus there is a growing need for the development of non-viral vectors. Cell penetrating peptides (CPPs) are non-viral vectors that can enter plasma membranes efficiently and deliver a broad range of cargoes. Our bioinformatic prediction and wet-lab validation data suggested that peptide P1 derived from MARCKS protein phosphorylation site domain is a new potential CPP candidate. We found that peptide P1 can efficiently internalize into various cell lines in a concentration-dependent manner. Receptor-mediated endocytosis pathway is the major mechanism of P1 penetration, although P1 also directly penetrates the plasma membrane. We also found that peptide P1 has low cytotoxicity in cultured cell lines as well as mouse red blood cells. Furthermore, peptide P1 not only can enter into cultured cells itself, but it also can interact with plasmid DNA and mediate the functional delivery of plasmid DNA into cultured cells, even in hard-to-transfect cells. Combined, these findings indicate that P1 may be a promising vector for efficient intracellular delivery of bioactive cargos.

journal_name

Drug Deliv

journal_title

Drug delivery

authors

Chen L,Guo X,Wang L,Geng J,Wu J,Hu B,Wang T,Li J,Liu C,Wang H

doi

10.1080/10717544.2021.1960922

keywords:

["Cell-permeable peptides (CPPs)","bioinformatics","plasmid DNA delivery"]

subject

Has Abstract

pub_date

2021-12-01 00:00:00

pages

1637-1648

issue

1

eissn

1071-7544

issn

1521-0464

journal_volume

28

pub_type

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