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2017 ; 7
(ä): 46557
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Broad and potent cross clade neutralizing antibodies with multiple specificities
in the plasma of HIV-1 subtype C infected individuals
#MMPMID28436427
Cheedarla N
; Precilla KL
; Babu H
; Vijayan KKV
; Ashokkumar M
; Chandrasekaran P
; Kailasam N
; Sundaramurthi JC
; Swaminathan S
; Buddolla V
; Vaniambadi SK
; Ramanathan VD
; Hanna LE
Sci Rep
2017[Apr]; 7
(ä): 46557
PMID28436427
show ga
Broadly Cross clade Neutralizing (BCN) antibodies are recognized as potential
therapeutic tools and leads for the design of a vaccine that can protect human
beings against various clades of Human Immunodeficiency Virus (HIV). In the
present study, we screened plasma of 88 HIV-1 infected ART naïve individuals for
their neutralization potential using a standard panel of 18 pseudoviruses
belonging to different subtypes and different levels of neutralization. We
identified 12 samples with good breadth of neutralization (neutralized >90% of
the viruses). Four of these samples neutralized even the difficult-to-neutralize
tier-3 pseudoviruses with great potency (GMT?>?600). Analysis of neutralization
specificities indicated that four samples had antibodies with multiple epitope
binding specificities, viz. CD4-binding site (CD4BS), glycans in the V1/V2 and V3
regions and membrane proximal external region (MPER). Our findings indicate the
strong possibility of identifying highly potent bNAbs with known or novel
specificities from HIV-1 subtype C infected individuals from India that can be
exploited as therapeutic tools or lead molecules for the identification of
potential epitopes for design of a protective HIV-1 vaccine.