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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Contrasting effects of Mycoplasma fermentans and M. felis on the viability and chemiluminescence response of human polymorphonuclear leukocytes.

Trypan blue exclusion was used to estimate the viability of human polymorphonuclear leukocytes (PMNL) in the presence of Mycoplasma felis and two strains of M. fermentans (PG18 and incognitus). The competence of PMNL to mount a respiratory burst when challenged with the mycoplasmas was also monitored by luminol-dependent chemiluminescence (CL). Both un-opsonised and non-immune human serum opsonised M. felis cells had little effect on PMNL viability. In contrast, PMNL viability was reduced markedly by un-opsonised cells of M. fermentans strain incognitus and, to a lesser extent, strain PG18, and opsonisation of these mycoplasmas further enhanced killing. Death of PMNL in the presence of M. fermentans was not associated with the autonomous production of active oxygen species during the respiratory burst as M. felis induced a high CL response from PMNL, whereas that induced by M. fermentans strain incognitus was significantly lower. M. fermentans may invade mammalian cells and it is suggested that the mechanism of PMNL death could be related to the ability of M. fermentans to penetrate host cell membranes.[1]


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