Progressing Moloney sarcoma virus (M-MSV) induced tumors: effect of host's immunomanipulation

D. Collavo, P. Zanovello, G. Biasi, L. Chieco-Bianchi

Research output: Contribution to journalArticlepeer-review


We have observed that mice that were selectively 'deprived' of T lymphocytes by adult thymectomy, lethal-irradiation and bone-marrow reconstitution, are highly susceptible to M-MSV oncogenesis throughout all their life time, and develop progressively growing tumors in all instances. However, transfer of even low doses (0.25 x 106) of non-immune syngeneic lymphoid cells brings about tumor prevention or regression in 50% of M-MSV-injected deprived mice. The protective effect is long-lasting since comparable results are obtained when deprived mice are injected with graded numbers of cells 60 days or 1 day before M-MSV inoculation. M-MSV tumor prevention is exclusively due to the T-cell population since T-cell-depleted spleen cells from tumor regressor donor mice have no protective effect when transferred into M-MSV-injected deprived mice. We have also observed that M-MSV immune T cells can cause regression even in deprived mice bearing large tumors at the moment of cell transfer.

Original languageEnglish
Pages (from-to)155-158
Number of pages4
JournalCellular and Molecular Biology
Issue number2
Publication statusPublished - 1980

ASJC Scopus subject areas

  • Cell Biology
  • Clinical Biochemistry
  • Molecular Biology


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