HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression

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dc.contributor.authorLumngwena, Evelyn N
dc.contributor.authorShuping, Liliwe
dc.contributor.authorBernitz, Netanya
dc.contributor.authorWoodman, Zenda
dc.date.accessioned2019-08-20T12:34:04Z
dc.date.available2019-08-20T12:34:04Z
dc.date.issued2019-06-17
dc.date.updated2019-06-23T03:40:03Z
dc.description.abstractObjective As part of a larger study to understand how Envelope N-glycosylation influences HIV-1 pathogenesis, we selected a participant infected with a single Subtype C variant and determined whether deletion of specific potential N-glycan sites (PNGs) impacted Envelope function longitudinally. Results We deleted five PNGs previously linked to HIV-1 transmission of two matched Envelope clones representing variants at 5 and 173 weeks post-infection. The transmitted founder (TF) had significantly better pseudovirus entry efficiency than the chronic infection (CI) variant. Deletion of all PNGs significantly reduced TF entry efficiency, binding to dendritic cell-specific intracellular adhesion molecule 3 grabbing non-integrin (DC-SIGN) receptor and trans-infection. However, mutational analysis did not affect the phenotype of the CI Envelope to the same extent. Notably, deletion of the PNGs at N241 and N448 had no effect on CI Envelope function, suggesting that some PNGs might only be important during acute infection. Therefore, vaccines that elicit antibodies against N-glycans important for TF Envelope function could drive the loss of PNGs during immune escape, abrogating viral replication. Conversely, changes in N-glycosylation might have no effect on some variants, reducing vaccine efficacy. This finding highlights the need for further investigation into the role of Envelope N-glycosylation in HIV-1 pathogenesis.
dc.identifier.apacitationLumngwena, E. N., Shuping, L., Bernitz, N., & Woodman, Z. (2019). HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression. <i>BMC Research Notes</i>, http://hdl.handle.net/11427/30491en_ZA
dc.identifier.chicagocitationLumngwena, Evelyn N, Liliwe Shuping, Netanya Bernitz, and Zenda Woodman "HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression." <i>BMC Research Notes</i> (2019) http://hdl.handle.net/11427/30491en_ZA
dc.identifier.citationLumngwena, E. N., Shuping, L., Bernitz, N., & Woodman, Z. 2019. HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression. BMC research notes, 12(1): 340.
dc.identifier.ris TY - AU - Lumngwena, Evelyn N AU - Shuping, Liliwe AU - Bernitz, Netanya AU - Woodman, Zenda AB - Objective As part of a larger study to understand how Envelope N-glycosylation influences HIV-1 pathogenesis, we selected a participant infected with a single Subtype C variant and determined whether deletion of specific potential N-glycan sites (PNGs) impacted Envelope function longitudinally. Results We deleted five PNGs previously linked to HIV-1 transmission of two matched Envelope clones representing variants at 5 and 173 weeks post-infection. The transmitted founder (TF) had significantly better pseudovirus entry efficiency than the chronic infection (CI) variant. Deletion of all PNGs significantly reduced TF entry efficiency, binding to dendritic cell-specific intracellular adhesion molecule 3 grabbing non-integrin (DC-SIGN) receptor and trans-infection. However, mutational analysis did not affect the phenotype of the CI Envelope to the same extent. Notably, deletion of the PNGs at N241 and N448 had no effect on CI Envelope function, suggesting that some PNGs might only be important during acute infection. Therefore, vaccines that elicit antibodies against N-glycans important for TF Envelope function could drive the loss of PNGs during immune escape, abrogating viral replication. Conversely, changes in N-glycosylation might have no effect on some variants, reducing vaccine efficacy. This finding highlights the need for further investigation into the role of Envelope N-glycosylation in HIV-1 pathogenesis. DA - 2019-06-17 DB - OpenUCT DP - University of Cape Town J1 - BMC Research Notes KW - HIV-1 KW - Envelope N-glycosylation KW - Envelope function KW - Transmitted founder LK - https://open.uct.ac.za PY - 2019 T1 - HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression TI - HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression UR - http://hdl.handle.net/11427/30491 ER - en_ZA
dc.identifier.urihttps://doi.org/10.1186/s13104-019-4375-0
dc.identifier.urihttp://hdl.handle.net/11427/30491
dc.identifier.vancouvercitationLumngwena EN, Shuping L, Bernitz N, Woodman Z. HIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression. BMC Research Notes. 2019; http://hdl.handle.net/11427/30491.en_ZA
dc.language.rfc3066en
dc.rights.holderThe Author(s)
dc.sourceBMC Research Notes
dc.source.urihttps://bmcresnotes.biomedcentral.com/
dc.subjectHIV-1
dc.subjectEnvelope N-glycosylation
dc.subjectEnvelope function
dc.subjectTransmitted founder
dc.titleHIV-1 subtype C Envelope function becomes less sensitive to N-glycosylation deletion during disease progression
dc.typeJournal Article
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