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Retro-inversion enhances the adjuvant and CpG co-adjuvant activity of host defence peptide Bac2A.

Abstract：

:Host defence peptides (HDPs) have a variety of potential therapeutic applications, including as vaccine adjuvants, energizing efforts for modification strategies to address their toxicity and instability. Here we compare l, d and RI-Bac2A as vaccine adjuvants. d and RI-Bac2A are equally resistant to proteolytic degradation with no increases in toxicity, however, only RI-Bac2A maintains adjuvant activity of the natural peptide through conserved induction of a Th2 immune response. As HDPs potentiate the adjuvant activity of CpG ODNs, the isomers were also evaluated as co-adjuvants. l-Bac2A has no significant co-adjuvant activity while CpG/RI-Bac2A induces antibody titres significantly higher than CpG (P<0.01), CpG/l-Bac2A (P<0.01) or CpG/d-Bac2A (P<0.01). None of the isomers influence ODN duration or distribution but l and RI-Bac2A promote ODN uptake into B cells and antigen presenting cells. The enhanced adjuvant and co-adjuvant of RI-Bac2A is hypothesized to result from an undefined combination of increased stability and retained biological activity supporting application of retro-inversion to this, and potentially other HDPs.

journal_name

Vaccine

journal_title

Vaccine

authors

Scruten E,Kovacs-Nolan J,Griebel PJ,Latimer L,Kindrachuk J,Potter A,Babiuk LA,Littel-van den Hurk Sv,Napper S

doi

10.1016/j.vaccine.2010.02.015

subject

Has Abstract

pub_date

2010-04-09 00:00:00

pages

2945-56

issue

17

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(10)00183-0

journal_volume

28

pub_type

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