IL-15 regulates susceptibility of CD4+ T cells to HIV infection

Lara Manganaro, Patrick Hong, Matthew M. Hernandez, Dionne Argyle, Lubbertus C.F. Mulder, Uma Potla, Felipe Diaz-Griffero, Benhur Lee, Ana Fernandez-Sesma, Viviana Simon

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

HIV integrates into the host genome to create a persistent viral reservoir. Stimulation of CD4+ memory T lymphocytes with common γc-chain cytokines renders these cells more susceptible to HIV infection, making them a key component of the reservoir itself. IL-15 is up-regulated during primary HIV infection, a time when the HIV reservoir established. Therefore, we investigated the molecular and cellular impact of IL-15 on CD4+ T-cell infection. We found that IL-15 stimulation induces SAM domain and HD domaincontaining protein 1 (SAMHD1) phosphorylation due to cell cycle entry, relieving an early block to infection. Perturbation of the pathways downstream of IL-15 receptor (IL-15R) indicated that SAMHD1 phosphorylation after IL-15 stimulation is JAK dependent. Treating CD4+ T cells with Ruxolitinib, an inhibitor of JAK1 and JAK2, effectively blocked IL-15-induced SAMHD1 phosphorylation and protected CD4+ T cells from HIV infection. Using high-resolution single-cell immune profiling using mass cytometry by TOF (CyTOF), we found that IL-15 stimulation altered the composition of CD4+ T-cell memory populations by increasing proliferation of memory CD4+ T cells, including CD4+ T memory stem cells (TSCM). IL-15-stimulated CD4+ TSCM, harboring phosphorylated SAMHD1, were preferentially infected. We propose that IL-15 plays a pivotal role in creating a self-renewing, persistent HIV reservoir by facilitating infection of CD4+ T cells with stem cell-like properties. Time-limited interventions with JAK1 inhibitors, such as Ruxolitinib, should prevent the inactivation of the endogenous restriction factor SAMHD1 and protect this long-lived CD4+ T-memory cell population from HIV infection.

Original languageEnglish (US)
Pages (from-to)E9659-E9667
JournalProceedings of the National Academy of Sciences of the United States of America
Volume115
Issue number41
DOIs
StatePublished - Oct 9 2018

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Interleukin-15
HIV Infections
T-Lymphocytes
Phosphorylation
HIV
Proteins
Interleukin-15 Receptors
Stem Cells
Infection
Population
Cell Cycle
Sterile Alpha Motif
Genome
Cytokines

ASJC Scopus subject areas

  • General

Cite this

Manganaro, L., Hong, P., Hernandez, M. M., Argyle, D., Mulder, L. C. F., Potla, U., ... Simon, V. (2018). IL-15 regulates susceptibility of CD4+ T cells to HIV infection. Proceedings of the National Academy of Sciences of the United States of America, 115(41), E9659-E9667. https://doi.org/10.1073/pnas.1806695115

IL-15 regulates susceptibility of CD4+ T cells to HIV infection. / Manganaro, Lara; Hong, Patrick; Hernandez, Matthew M.; Argyle, Dionne; Mulder, Lubbertus C.F.; Potla, Uma; Diaz-Griffero, Felipe; Lee, Benhur; Fernandez-Sesma, Ana; Simon, Viviana.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 115, No. 41, 09.10.2018, p. E9659-E9667.

Research output: Contribution to journalArticle

Manganaro, L, Hong, P, Hernandez, MM, Argyle, D, Mulder, LCF, Potla, U, Diaz-Griffero, F, Lee, B, Fernandez-Sesma, A & Simon, V 2018, 'IL-15 regulates susceptibility of CD4+ T cells to HIV infection', Proceedings of the National Academy of Sciences of the United States of America, vol. 115, no. 41, pp. E9659-E9667. https://doi.org/10.1073/pnas.1806695115
Manganaro, Lara ; Hong, Patrick ; Hernandez, Matthew M. ; Argyle, Dionne ; Mulder, Lubbertus C.F. ; Potla, Uma ; Diaz-Griffero, Felipe ; Lee, Benhur ; Fernandez-Sesma, Ana ; Simon, Viviana. / IL-15 regulates susceptibility of CD4+ T cells to HIV infection. In: Proceedings of the National Academy of Sciences of the United States of America. 2018 ; Vol. 115, No. 41. pp. E9659-E9667.
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