TY - JOUR
T1 - Variability OF HIV-1 V2 env domain for integrin binding
T2 - Clinical correlates
AU - Fabrizio, Claudia
AU - Bavaro, Davide F.
AU - Scudeller, Luigia
AU - Lepore, Luciana
AU - Balena, Flavia
AU - Lagioia, Antonella
AU - Angarano, Gioacchino
AU - Monno, L.
AU - Saracino, Annalisa
PY - 2019/9/1
Y1 - 2019/9/1
N2 - The HIV V2179−181 (HXB2 numbering) tripeptide mediates binding to α4β7 integrin, which is responsible for GALT homing. Our study aimed to assess V2 variability in naive HIV-1 infected patients and its association with clinical and viro-immunological features. Gp120 sequences were obtained from 322 subjects; length, potential N-linked glycosylation sites (PNGs), net-charge (NC) and 179− 181tripeptide α4β7-binding-motif of V2 were evaluated. At multivariate analysis, lower V2 length and higher NC correlated with low CD4 cells; no association was found with PNGs. A greater variability pertained positions 162–163, 164–167, 169, 175–179, 187, 194 and 195 in B sequences, and 163 and 177 in X4 tropic viruses. LDV was the most common tripeptide. Asp180 was highly conserved; Leu179 was more frequently observed in non-B and in recent infections compared to others, while Val181 was found in recent infections and in MSM. Further studies to deeply explore the clinical significance of these associations are warranted.
AB - The HIV V2179−181 (HXB2 numbering) tripeptide mediates binding to α4β7 integrin, which is responsible for GALT homing. Our study aimed to assess V2 variability in naive HIV-1 infected patients and its association with clinical and viro-immunological features. Gp120 sequences were obtained from 322 subjects; length, potential N-linked glycosylation sites (PNGs), net-charge (NC) and 179− 181tripeptide α4β7-binding-motif of V2 were evaluated. At multivariate analysis, lower V2 length and higher NC correlated with low CD4 cells; no association was found with PNGs. A greater variability pertained positions 162–163, 164–167, 169, 175–179, 187, 194 and 195 in B sequences, and 163 and 177 in X4 tropic viruses. LDV was the most common tripeptide. Asp180 was highly conserved; Leu179 was more frequently observed in non-B and in recent infections compared to others, while Val181 was found in recent infections and in MSM. Further studies to deeply explore the clinical significance of these associations are warranted.
KW - Gp-120
KW - HIV-1
KW - Integrins
KW - V2 tripeptide
KW - α4β7
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UR - http://www.scopus.com/inward/citedby.url?scp=85069659920&partnerID=8YFLogxK
U2 - 10.1016/j.virol.2019.07.019
DO - 10.1016/j.virol.2019.07.019
M3 - Article
AN - SCOPUS:85069659920
VL - 535
SP - 266
EP - 271
JO - Virology
JF - Virology
SN - 0042-6822
ER -