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Secondary lymphoid organ fibroblastic reticular cells mediate trans-infection of HIV-1 via CD44-hyaluronan interactions

Author

Listed:
  • Tomoyuki Murakami

    (University of Michigan Medical School)

  • Jiwon Kim

    (University of Michigan)

  • Yi Li

    (University of Michigan
    University of Michigan)

  • Glenn Edward Green

    (University of Michigan Medical School)

  • Ariella Shikanov

    (University of Michigan
    University of Michigan)

  • Akira Ono

    (University of Michigan Medical School)

Abstract

Fibroblastic reticular cells (FRCs) are stromal cells in secondary lymphoid organs, the major sites for HIV-1 infection of CD4+ T cells. Although FRCs regulate T cell survival, proliferation, and migration, whether they play any role in HIV-1 spread has not been studied. Here, we show that FRCs enhance HIV-1 spread via trans-infection in which FRCs capture HIV-1 and facilitate infection of T cells that come into contact with FRCs. FRCs mediate trans-infection in both two- and three-dimensional culture systems and in a manner dependent on the virus producer cells. This producer cell dependence, which was also observed for virus spread in secondary lymphoid tissues ex vivo, is accounted for by CD44 incorporated into virus particles and hyaluronan bound to such CD44 molecules. This virus-associated hyaluronan interacts with CD44 expressed on FRCs, thereby promoting virus capture by FRCs. Overall, our results reveal a novel role for FRCs in promoting HIV-1 spread.

Suggested Citation

  • Tomoyuki Murakami & Jiwon Kim & Yi Li & Glenn Edward Green & Ariella Shikanov & Akira Ono, 2018. "Secondary lymphoid organ fibroblastic reticular cells mediate trans-infection of HIV-1 via CD44-hyaluronan interactions," Nature Communications, Nature, vol. 9(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04846-w
    DOI: 10.1038/s41467-018-04846-w
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