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A hard way to the nucleus.

Michael Bukrinsky1

  • 1The George Washington University Medical Center, 2300 Eye Street NW, Ross Hall Room 734, Washington, DC 20037, USA. mtmmib@gwumc.edu

Molecular Medicine (Cambridge, Mass.)
|October 27, 2004
PubMed
Summary

Human immunodeficiency virus (HIV) can infect cells by entering the nucleus during interphase, unlike most retroviruses. This review discusses the ongoing research into the mechanisms controlling HIV nuclear import.

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Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Human immunodeficiency virus (HIV) causes AIDS by integrating its genome into host DNA.
  • Unlike most retroviruses, HIV can enter the host cell nucleus during interphase, not just during mitosis.
  • This nuclear entry allows HIV to infect non-dividing cells like macrophages, crucial for disease progression.

Purpose of the Study:

  • To review recent advances in understanding HIV nuclear import mechanisms.
  • To discuss proposed viral and cellular factors involved in HIV nuclear entry.
  • To suggest potential solutions for the unresolved controversy surrounding HIV nuclear import.

Main Methods:

  • Literature review of studies on HIV pre-integration complex.
  • Analysis of proposed viral factors (matrix protein, integrase, Vpr, DNA flap).
  • Discussion of cellular proteins potentially involved in nuclear import.

Main Results:

  • Several viral factors previously thought to regulate HIV nuclear import have been shown to be nonessential.
  • Despite extensive research since the early 1990s, there is no scientific consensus on the mechanisms of HIV nuclear import.
  • The ability of HIV to infect macrophages is linked to its nuclear import capability.

Conclusions:

  • The precise mechanisms governing HIV nuclear import remain elusive.
  • Further research is needed to identify the specific viral and cellular factors that control this critical step.
  • Understanding HIV nuclear import is vital for developing effective antiviral strategies against HIV-1 and other lentiviruses.

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