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Review article| Volume 22, ISSUE 3, P593-610, September 2002

HIV-1 RNA and viral load

  • Karen Relucio
    Affiliations
    Division of Infectious Diseases and Geographic Medicine, Stanford University Medical Center, 300 Pasteur Drive S-156, Stanford, CA 94304, USA
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  • Mark Holodniy
    Correspondence
    AIDS Research Center, VA Palo Alto Health Care System, 3801 Miranda Avenue (132), Palo Alto, CA 94304
    Affiliations
    Division of Infectious Diseases and Geographic Medicine, Stanford University Medical Center, 300 Pasteur Drive S-156, Stanford, CA 94304, USA

    AIDS Research Center, VA Palo Alto Health Care System, 3801 Miranda Avenue (132), Palo Alto, CA 94304, USA
    Search for articles by this author
      The use of reverse transcription (RT) followed by polymerase chain reaction (PCR) to detect HIV-1 RNA in serum was first described in 1988 [
      • Byrne B.C.
      • Li J.J.
      • Sninsky J.
      • et al.
      Detection of HIV-1 RNA sequences by in vitro DNA amplification.
      ]. Using plasma-associated HIV-1 RNA (viral load) as a surrogate marker in clinical practice was first introduced in the mid-1990s, with multiple reports describing plasma viral load quantification and the relationship of copy number to stage of HIV disease and response to antiretroviral therapy. Concurrently, three different methods to quantify viral load were being developed, resulting in the first United States Food and Drug Administration (FDA)–approved RT-PCR–based assay for determining prognosis and monitoring antiretroviral therapy in 1997, and the approval of an ultrasensitive version in 1999. More recently, in November 2001, the United States FDA approved a nucleic acid sequence-based amplification (NASBA) test for quantifying HIV-1 in human plasma.
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