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2016 ; 113
(45
): E7039-E7048
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Optimal immunization cocktails can promote induction of broadly neutralizing Abs
against highly mutable pathogens
#MMPMID27791170
Shaffer JS
; Moore PL
; Kardar M
; Chakraborty AK
Proc Natl Acad Sci U S A
2016[Nov]; 113
(45
): E7039-E7048
PMID27791170
show ga
Strategies to elicit Abs that can neutralize diverse strains of a highly mutable
pathogen are likely to result in a potent vaccine. Broadly neutralizing Abs
(bnAbs) against HIV have been isolated from patients, proving that the human
immune system can evolve them. Using computer simulations and theory, we study
immunization with diverse mixtures of variant antigens (Ags). Our results show
that particular choices for the number of variant Ags and the mutational
distances separating them maximize the probability of inducing bnAbs. The variant
Ags represent potentially conflicting selection forces that can frustrate the
Darwinian evolutionary process of affinity maturation. An intermediate level of
frustration maximizes the chance of evolving bnAbs. A simple model makes vivid
the origin of this principle of optimal frustration. Our results, combined with
past studies, suggest that an appropriately chosen permutation of immunization
with an optimally designed mixture (using the principles that we describe) and
sequential immunization with variant Ags that are separated by relatively large
mutational distances may best promote the evolution of bnAbs.