Evidence map›Paper›PMID 19748484›Full record

ArticleBiochemical and biophysical research communications2009

Germline-like predecessors of broadly neutralizing antibodies lack measurable binding to HIV-1 envelope glycoproteins: implications for evasion of immune responses and design of vaccine immunogens.

Xiaodong Xiao, Weizao Chen, Yang Feng, Zhongyu Zhu, Ponraj Prabakaran, Yanping Wang, Mei-Yun Zhang, Nancy S Longo, Dimiter S Dimitrov

Open access · greenAbstract read
In one paragraph

Article in Biochemical and biophysical research communications, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 207 papers.

0numbers the graph read from it
0cells of the map it votes in
207citing papers in PubMed
5.8field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

207 citing papers in PubMed, 267 citations in OpenAlex.

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  12. Antibody feedback establishes an affinity brake in the germinal center.bioRxiv : the preprint server for biology · 2025
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  17. Structural insights into VRC01-class bnAb precursors with diverse light chains elicited in the IAVI G001 human vaccine trial.Proceedings of the National Academy of Sciences of the United States of America · 2025
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147 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 1 country.

Xiaodong XiaoProtein Interactions Group, CCRNP, NCI-Frederick, NIH, Frederick, MD 21702, USA.
Weizao Chen
Yang Feng
Zhongyu Zhu
Ponraj Prabakaran
Yanping Wang
Mei-Yun Zhang
Nancy S Longo
Dimiter S Dimitrov
Science Applications International Corporation (United States) · USNational Institutes of Health · US

Funding

Human Monoclonal Antibodies Against CancerZIABC010701 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI DIMITROV, DIMITER S · 2009 to 2017
$6.9M
Antibody-based therapeutics and vaccines against AIDSZIABC011155 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI DIMITROV, DIMITER S · 2009 to 2017
$2.6M
Human Monoclonal Antibodies and Antibody-Guided NanoparticlesZ01BC010701 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI DIMITROV, DIMITER S · 2006 to 2008
$2.6M
Intramural NIH HHS Z01 BC010701NCI NIH HHS N01 CO012400NCI NIH HHS N01-CO-12400
6 · The paper itself

Abstract

Several human monoclonal antibodies (hmAbs) including b12, 2G12, and 2F5 exhibit relatively potent and broad HIV-1-neutralizing activity. However, their elicitation in vivo by vaccine immunogens based on the HIV-1 envelope glycoprotein (Env) has not been successful. We have hypothesized that HIV-1 has evolved a strategy to reduce or eliminate the immunogenicity of the highly conserved epitopes of such antibodies by using "holes" (absence or very weak binding to these epitopes of germline antibodies that is not sufficient to initiate and/or maintain an efficient immune response) in the human germline B cell receptor (BCR) repertoire. To begin to test this hypothesis we have designed germline-like antibodies corresponding most closely to b12, 2G12, and 2F5 as well as to X5, m44, and m46 which are cross-reactive but with relatively modest neutralizing activity as natively occurring antibodies due to size and/or other effects. The germline-like X5, m44, and m46 bound with relatively high affinity to all tested Envs. In contrast, germline-like b12, 2G12, and 2F5 lacked measurable binding to Envs in an ELISA assay although the corresponding mature antibodies did. These results provide initial evidence that Env structures containing conserved vulnerable epitopes may not initiate humoral responses by binding to germline antibodies. Even if such responses are initiated by very weak binding undetectable in our assay it is likely that they will be outcompeted by responses to structures containing the epitopes of X5, m44, m46, and other antibodies that bind germline BCRs with much higher affinity/avidity. This hypothesis, if further supported by data, could contribute to our understanding of how HIV-1 evades immune responses and offer new concepts for design of effective vaccine immunogens.

Indexed as

AIDS VaccinesAntibodies, MonoclonalAntibodies, NeutralizingAntibody Affinityenv Gene Products, Human Immunodeficiency VirusHIV-1HumansImmune EvasionAIDS VaccinesAntibodies, MonoclonalAntibodies, Neutralizingenv Gene Products, Human Immunodeficiency Virus

Identifiers

PMID19748484
PMCPMC2787893
OpenAlexW2051364248

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.