Journal of Neuro-Oncology

, Volume 19, Issue 2, pp 137–147

Mutant herpes simplex virus induced regression of tumors growing in immunocompetent rats

  • Michael G. Kaplitt
  • Juri G. Tjuvajev
  • David A. Leib
  • Jeffrey Berk
  • Karen D. Pettigrew
  • Jerome B. Posner
  • Donald W. Pfaff
  • Samuel D. Rabkin
  • Ronald G. Blasberg
Laboratory Investigation

DOI: 10.1007/BF01306455

Cite this article as:
Kaplitt, M.G., Tjuvajev, J.G., Leib, D.A. et al. J Neuro-Oncol (1994) 19: 137. doi:10.1007/BF01306455

Summary

Herpes simplex virus (HSV) mutants kill dividing tumor cells but spare non-proliferating, healthy brain tissue and may be useful in developing new treatment strategies for malignant brain tumors. Two HSV mutants, a thymidine kinase deficient virus (TK-) and a ribonucleotide reductase mutant (RR-), killed 7/7 human tumor cell lines in tissue culture. The TK-HSV killed Rat RG2 glioma and W256 carcinoma lines but not the rat C6 glioma in culture. TK-HSV replication (12 pfu/cell) was similar to wild-type HSV (10 pfu/cell) in rapidly dividing W256 cells in tissue culture, but was minimal (<1 pfu/cell) in serum-starved cells, suggesting that the proliferative activity of tumor cells at the site and time of TK-HSV injection may influence efficacyin vivo. Subcutaneous W256 tumors in male Sprague-Dawley rats were injected with TK-HSV or virus free inoculum. A significant effect of TK-HSV therapy on W256 tumor growth was demonstrated compared to controls (p=0.002). Complete regression was observed in 4/9 experimental tumors, with no recurrence over 6 months. Tumor growth in the remaining 5/9 animals was attenuated during the first 3 to 5 days after treatment, but not beyond 5 days compared to 9 matched control animals; no tumor regression was observed in any of the control animals. These results suggest that HSV mutants are potentially useful as novel therapeutic agents in the treatment of tumors in immunocompetent subjects.

Key words

HSVthymidine kinaseribonucleotide reductaseviral vectoranti-tumor effect

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Michael G. Kaplitt
    • 1
  • Juri G. Tjuvajev
    • 2
  • David A. Leib
    • 4
  • Jeffrey Berk
    • 2
  • Karen D. Pettigrew
    • 5
  • Jerome B. Posner
    • 2
  • Donald W. Pfaff
    • 1
  • Samuel D. Rabkin
    • 3
  • Ronald G. Blasberg
    • 2
  1. 1.Laboratory of Neurobiology and BehaviorRockefeller UniversityNew York
  2. 2.Department of NeurologyMemorial Sloan Kettering Cancer CenterNew York
  3. 3.Program in Molecular BiologyMemorial Sloan Kettering Cancer CenterNew York
  4. 4.Department of Ophthalmology and Visual SciencesWashington University School of MedicineSt. Louis
  5. 5.Division of Applied and Services ResearchNational Institute of Mental HealthBethesda