An in-vivo infectivity assay for cloned retroviruses lacking a susceptible cell culture

Eva Gak, Abraham Yaniv, Marius Ianconescu, Steven R. Tronick, Arnona Gazit

Research output: Contribution to journalArticlepeer-review

Abstract

The lymphoproliferative disease virus (LPDV) of turkeys is the retroviral agent of etiology of a rapidly developing, naturally occurring, lymphoproliferative process. Recently we have molecularly cloned the viral genome. The lack of a susceptible cell culture which can sustain LPDV replication hampered the analysis of the infectious capability of the cloned genome. Based on the efficient in-vivo replication of LPDV we have developed a sensitive in-vivo approach aimed at establishing the infectious capability of the cloned provirus. According to this approach, peripheral leukocytes withdrawn from 3-week-old turkeys were transfected with the cloned DNA and the transfected leukocytes were re-injected into the turkey from which they had been obtained. The injected leukocytes enabled the efficient expression of the viral genome and the release into the blood stream of LPDV virions, which thereafter could travel to their appropriate in-vivo target lymphoid cells and start multiple replication cycles, resulting in the development of a detectable viremia. The applicability of this in-vivo assay for other cloned viral genomes is discussed.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalJournal of Virological Methods
Volume28
Issue number2
DOIs
StatePublished - May 1990

Keywords

  • Infectivity assay
  • LPDV
  • Lymphoproliferative disease virus of turkeys
  • Retrovirus

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