A new improved method for the concentration of HIV-1 infective particles

J Virol Methods. 2002 Dec;106(2):167-73. doi: 10.1016/s0166-0934(02)00162-3.


Improvement of the sensitivity of detection systems for human immunodeficiency virus-1 (HIV-1) has been carried out. One approach to improve the sensitivity is purification and/or concentration of the virus from a specimen. In this study, a method for concentrating HIV-1 using polyethylene glycol (PEG) has been re-evaluated and the optimal protocol for concentrating the virus from low-titer specimens was determined. That is, to obtain a virus pellet, a mixture of equal volumes of a specimen and 20% PEG 20,000 solution in saline is incubated at 4 degrees C for 16 h and then centrifuged at 17860 x g in a microcentrifuge for 20 min. HIV-1 in the pellet could be detectable by HIV-1 p24 antigen capture assay for viral protein, reverse transcriptase (RT) assay for viral enzyme, reverse transcriptase polymerase chain reaction (RT-PCR) assay for viral RNA and a virus infectivity assay.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line
  • Centrifugation
  • HIV-1 / isolation & purification*
  • Humans
  • Microbiological Techniques*
  • Polyethylene Glycols
  • Reverse Transcriptase Polymerase Chain Reaction


  • Polyethylene Glycols