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  • Title: Suppression of Friend leukemia cell-induced tumours by cellular preparations of Candida albicans.
    Author: Cassone A, Scaringi L, Pesce CD, Titti F, Bistoni F, Marconi P, Rossi GB.
    Journal: Microbiologica; 1983 Jul; 6(3):207-20. PubMed ID: 6355774.
    Abstract:
    Inactivated cellular preparations and cell wall materials of Candida albicans (CA) were tested for their capacity to suppress the growth of Friend Leukemia Cell (FLC)-induced tumours and the infection by Friend Leukemia Virus (FLV) in histocompatible mice. Factors affecting the inhibition of tumor growth by CA cellular preparations were: i) the schedule of agent administration; ii) the method of cell inactivation; iii) the FLC load. In particular, mice given 10(7) yeast cells, inactivated by cold alkali, on days -14 and +1 with respect to 10(4) FLC challenge on day 0 did not develop tumors. A crude cell wall fraction derived from cells extracted with hot alkali was still effective in reducing (but not suppressing) tumour growth whereas a purified, particulate glucan fraction (glucan "ghosts", essentially consisting of beta 1,3-1,6 glucan) was ineffective. No cellular preparation or cell wall fraction exerted anti-FLV effects (as shown by splenomegaly measurements) nor did any CA material induce interferon-like activity in the serum of animals injected with either FLC or FLV. Therefore, the observed antitumor activity by CA was not mediated by antiviral effects but possibly due to an "adjuvant-type", nonspecific, immunopotentiation of host antitumor response, as documented in other animal tumor models.
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