Resistance to infection and activation of the monocyto-macrophage system caused by Bacillus firmus and its fractions.

Abstract:

:Crude lipids isolated from Bacillus firmus, but not from other bacilli, were previously found to induce significant resistance against Listeria monocytogenes infection in mice. In this study, formaldehyde- and heat-killed bacterins of eight Bacillus species and some cellular fractions of B. firmus were prepared and tested for further immunomodulatory activities. Crude lipids, their aqueous extract, LTA, Protodyne and Pex-residue preparations exhibited a strong anti-infection activity, whereas Pextract, P40 and all bacterins tested had no effect. Formaldehyde-killed bacterins, live bacteria and the P40 preparation of both B. firmus strains, as well as bacterins of both B. subtilis strains, induced pronounced splenomegaly in mice. Peptidoglycan and Pex-residue induced significant depression of cytochrome P-450 in mouse liver microsomes after application of 0.1 mg per mouse. Optimal conditions for obtaining a bacterial suspension exhibiting these immunomodulatory properties were elaborated.

journal_title

Folia microbiologica

authors

Mára M,Ocenásková J,Nováková M,Julák J,Mencíková E

doi

10.1007/BF02906811

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

147-51

issue

2

eissn

0015-5632

issn

1874-9356

journal_volume

39

pub_type

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