GagCM9-specific CD8 + T cells expressing limited public TCR clonotypes do not suppress SIV replication in vivo

Lara Vojnov, Mauricio A. Martins, Jorge R. Almeida, Zachary Ende, Eva G. Rakasz, Matthew R. Reynolds, Enrique J. Leon, Kim L. Weisgrau, Benjamin Burwitz, Joy M. Folkvord, Marlon G Veloso de Santana, Patrícia C Costa Neves, Elizabeth Connick, Pamela J. Skinner, Emma Gostick, David H. O'Connor, Nancy A. Wilson, Myrna C. Bonaldo, Ricardo Galler, David A. Price & 2 others Danny C. Douek, David I. Watkins

Research output: Contribution to journalArticle

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Abstract

Several lines of evidence suggest that HIV/SIV-specific CD8 + T cells play a critical role in the control of viral replication. Recently we observed high levels of viremia in Indian rhesus macaques vaccinated with a segment of SIVmac239 Gag (Gag 45-269) that were subsequently infected with SIVsmE660. These seven Mamu-A*01 + animals developed CD8 + T cell responses against an immunodominant epitope in Gag, GagCM9, yet failed to control virus replication. We carried out a series of immunological and virological assays to understand why these Gag-specific CD8 + T cells could not control virus replication in vivo. GagCM9-specific CD8 + T cells from all of the animals were multifunctional and were found in the colonic mucosa. Additionally, GagCM9-specific CD8 + T cells accessed B cell follicles, the primary residence of SIV-infected cells in lymph nodes, with effector to target ratios between 20-250 GagCM9-specific CD8 + T cells per SIV-producing cell. Interestingly, vaccinated animals had few public TCR clonotypes within the GagCM9-specific CD8 + T cell population pre- and post-infection. The number of public TCR clonotypes expressed by GagCM9-specific CD8 + T cells post-infection significantly inversely correlated with chronic phase viral load. It is possible that these seven animals failed to control viral replication because of the narrow TCR repertoire expressed by the GagCM9-specific CD8 + T cell population elicited by vaccination and infection.

Original languageEnglish (US)
Article numbere23515
JournalPLoS One
Volume6
Issue number8
DOIs
StatePublished - Aug 26 2011
Externally publishedYes

Fingerprint

T-cells
T-lymphocytes
T-Lymphocytes
virus replication
Animals
Virus Replication
Infection
Viruses
infection
animals
Immunodominant Epitopes
Viremia
viremia
viral load
Macaca mulatta
Viral Load
Population
B-lymphocytes
mucosa
lymph nodes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Vojnov, L., Martins, M. A., Almeida, J. R., Ende, Z., Rakasz, E. G., Reynolds, M. R., ... Watkins, D. I. (2011). GagCM9-specific CD8 + T cells expressing limited public TCR clonotypes do not suppress SIV replication in vivo. PLoS One, 6(8), [e23515]. https://doi.org/10.1371/journal.pone.0023515

GagCM9-specific CD8 + T cells expressing limited public TCR clonotypes do not suppress SIV replication in vivo. / Vojnov, Lara; Martins, Mauricio A.; Almeida, Jorge R.; Ende, Zachary; Rakasz, Eva G.; Reynolds, Matthew R.; Leon, Enrique J.; Weisgrau, Kim L.; Burwitz, Benjamin; Folkvord, Joy M.; de Santana, Marlon G Veloso; Neves, Patrícia C Costa; Connick, Elizabeth; Skinner, Pamela J.; Gostick, Emma; O'Connor, David H.; Wilson, Nancy A.; Bonaldo, Myrna C.; Galler, Ricardo; Price, David A.; Douek, Danny C.; Watkins, David I.

In: PLoS One, Vol. 6, No. 8, e23515, 26.08.2011.

Research output: Contribution to journalArticle

Vojnov, L, Martins, MA, Almeida, JR, Ende, Z, Rakasz, EG, Reynolds, MR, Leon, EJ, Weisgrau, KL, Burwitz, B, Folkvord, JM, de Santana, MGV, Neves, PCC, Connick, E, Skinner, PJ, Gostick, E, O'Connor, DH, Wilson, NA, Bonaldo, MC, Galler, R, Price, DA, Douek, DC & Watkins, DI 2011, 'GagCM9-specific CD8 + T cells expressing limited public TCR clonotypes do not suppress SIV replication in vivo', PLoS One, vol. 6, no. 8, e23515. https://doi.org/10.1371/journal.pone.0023515
Vojnov, Lara ; Martins, Mauricio A. ; Almeida, Jorge R. ; Ende, Zachary ; Rakasz, Eva G. ; Reynolds, Matthew R. ; Leon, Enrique J. ; Weisgrau, Kim L. ; Burwitz, Benjamin ; Folkvord, Joy M. ; de Santana, Marlon G Veloso ; Neves, Patrícia C Costa ; Connick, Elizabeth ; Skinner, Pamela J. ; Gostick, Emma ; O'Connor, David H. ; Wilson, Nancy A. ; Bonaldo, Myrna C. ; Galler, Ricardo ; Price, David A. ; Douek, Danny C. ; Watkins, David I. / GagCM9-specific CD8 + T cells expressing limited public TCR clonotypes do not suppress SIV replication in vivo. In: PLoS One. 2011 ; Vol. 6, No. 8.
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AU - Leon, Enrique J.

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AU - Wilson, Nancy A.

AU - Bonaldo, Myrna C.

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