20 research outputs found
Neutralization assays on JR-FL glycan mutants indicate binding of inferred intermediate antibodies to both N301 and N332 on HIV-1 Env.
<p>(<b>A</b>) Neutralization curves of inferred intermediate antibodies on wild-type JR-FL virus (<b>B</b>) JR-FL N301A mutant virus, and (<b>C</b>) JR-FL N332A mutant virus. (<b>D</b>) Neutralization curves of 3H+3L and (<b>E</b>) PGT121 on wild-type JR-FL virus compared to single and double glycan mutant viruses. (<b>F</b>) Neutralization curves of PGT121 on wild-type 92BR020 virus compared to single and double glycan mutant viruses.</p
Selected heavy and light chain clones were paired and tested for neutralization breadth and potency on a cross-clade 6-virus panel.
<p>(<b>A</b>) Heavy and light chain nodes leading to mAb PGT121 and (<b>B</b>) PGT124 were paired and tested on a 74-virus panel of PGT121- or PGT124-sensitive viruses. Boxes are colored by IC<sub>50</sub> values (µg/ml) of each isolate neutralized.</p
Putative germline of PGT121 does not bind monomeric gp120 or cell surface Env.
<p>(<b>A</b>) PGT121germline does not bind recombinant gp120 (92BR020). Recombinant gp120s were produced in 293F cells and purified by lectin column before use in ELISA binding assays. ELISA values are reported in optical density at 405 nm (OD405). (<b>B</b>) PGT121germline does not cell surface Env (92BR020). Cell surface Env was produced by transfecting pseudovirus in 293T cells and binding was measured by flow cytometry (reported in mean fluorescence intensity or MFI).</p
Higher levels of somatic hypermutation correlates with greater neutralization breadth and potency.
<p>(<b>A</b>) Summary of neutralization data in <a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1003754#ppat-1003754-g004" target="_blank">Figure 4A–B</a> by each clade neutralized. Listed in colored boxes are percentage values. (<b>B</b>) Overall mutation frequencies of mAb combinations, which were calculated by overall number of nucleotide mutations in both heavy and light chains divided by combined heavy and light chain lengths. The mutation frequency of each heavy and light chain was calculated over both V- and J-genes.</p