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Tat's seductive side

As the major activator of HIV transcription, Tat drives viral gene expression. Now, it seems that in dendritic cells Tat also regulates the expression of chemokines that promote lymphocyte and monocyte migration. By recruiting susceptible host cells to infected dendritic cells, Tat may facilitate HIV dissemination (pages 191–197).

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Figure 1: Tat enhances viral dissemination.

Courtesy of Beth Mellor

Figure 2: Branching out.

Karla J. Daniels, David R. Soll, University of Iowa

References

  1. Cullen, B.R. HIV-1 auxiliary proteins: making connections in a dying cell. Cell 93, 685–692 (1998).

    Article  CAS  Google Scholar 

  2. Izmailova, E. et al. HIV-1 Tat reprograms immature dendritic cells to express chemoattractants for activated T-cells and macrophages. Nat. Med. 9, 191–197 (2003).

    Article  CAS  Google Scholar 

  3. Perelson, A.S. Modeling viral and immune system dynamics. Nat. Rev. Immunol. 2, 28–36 (2002).

    Article  CAS  Google Scholar 

  4. Frank, I. & Pope, M. The enigma of dendritic cell-immunodeficiency virus interplay. Curr. Mol. Med. 2, 229–248 (2002).

    Article  CAS  Google Scholar 

  5. Wei, P., Garber, M.E., Fang, S.M., Fischer, W.H. & Jones, K.A. A novel CDK9-associated C-type cyclin interacts directly with HIV-1 Tat and mediates its high-affinity, loop-specific binding to TAR RNA. Cell 92, 451–462 (1998).

    Article  CAS  Google Scholar 

  6. Price, D.H. P-TEFb, a cyclin-dependent kinase controlling elongation by RNA polymerase II. Mol. Cell. Biol. 20, 2629–2634 (2000).

    Article  CAS  Google Scholar 

  7. Schmidtmayerova, H. et al. Human immunodeficiency virus type 1 infection alters chemokine β peptide expression in human monocytes: implications for recruitment of leukocytes into brain and lymph nodes. Proc. Natl. Acad. Sci. USA 93, 700–704 (1996).

    Article  CAS  Google Scholar 

  8. Canque, B. et al. Macrophage inflammatory protein-1α is induced by human immunodeficiency virus infection of monocyte-derived macrophages. Blood 87, 2011–2019 (1996).

    CAS  PubMed  Google Scholar 

  9. Swingler, S. et al. HIV-1 Nef mediates lymphocyte chemotaxis and activation by infected macrophages. Nat. Med. 5, 997–1003 (1999).

    Article  CAS  Google Scholar 

  10. Messmer, D. et al. Endogenously expressed Nef uncouples cytokine and chemokine production from membrane phenotypic maturation in dendritic cells. J. Immunol. 169, 4172–4182 (2002).

    Article  CAS  Google Scholar 

  11. Albini, A. et al. HIV-1 Tat protein mimicry of chemokines. Proc. Natl. Acad. Sci. USA 95, 13153–13158 (1998).

    Article  CAS  Google Scholar 

  12. de Paulis, A. et al. Tat protein is an HIV-1-encoded β-chemokine homolog that promotes migration and up-regulates CCR3 expression on human FcεRI+ cells. J. Immunol. 165, 7171–7179 (2000).

    Article  CAS  Google Scholar 

  13. Murphy, P.M. Viral exploitation and subversion of the immune system through chemokine mimicry. Nat. Immunol. 2, 116–122 (2001).

    Article  CAS  Google Scholar 

  14. Ramratnam, B. et al. Rapid production and clearance of HIV-1 and hepatitis C virus assessed by large volume plasma apheresis. Lancet 354, 1782–1785 (1999).

    Article  CAS  Google Scholar 

  15. Igarashi, T. et al. Human immunodeficiency virus type 1 neutralizing antibodies accelerate clearance of cell-free virions from blood plasma. Nat. Med. 5, 211–216 (1999).

    Article  CAS  Google Scholar 

Download references

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Stevenson, M. Tat's seductive side. Nat Med 9, 163–164 (2003). https://doi.org/10.1038/nm0203-163

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