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. 1992 Mar;60(3):742–748. doi: 10.1128/iai.60.3.742-748.1992

Role of mycoplasma infection in the cytopathic effect induced by human immunodeficiency virus type 1 in infected cell lines.

M Lemaître 1, Y Henin 1, F Destouesse 1, C Ferrieux 1, L Montagnier 1, A Blanchard 1
PMCID: PMC257548  PMID: 1371767

Abstract

In addition to previously reported tetracycline analogs, other antibiotics known for antimycoplasmal activities inhibited the cytopathic effect in CEM cl13 cells infected with human immunodeficiency virus type 1 (HIV-1) or HIV-2 but were unable to block virus replication. A contaminating mycoplasma was isolated from our CEM cl13 cells and identified as a strain of Mycoplasma fermentans. Following infection of lymphoblastoid (CEM) or promonocytic (U937 and THP1) cell lines with HIV-1, cytopathic effect was observed only in association with mycoplasmal contamination. Moreover, HIV-1 infection of U937 cells after experimental inoculation with a human isolate of M. fermentans led to pronounced cell killing. We have verified that this effect is not merely an artifact caused by arginine and/or glucose depletion in the cell culture medium. These results confirm that mollicutes, in particular M. fermentans, are able to act synergistically with HIV-1 to kill infected cells in some in vitro systems.

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