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. 1993 Jan;61(1):303–306. doi: 10.1128/iai.61.1.303-306.1993

Apathogenic, intestinal, segmented, filamentous bacteria stimulate the mucosal immune system of mice.

H L Klaasen 1, P J Van der Heijden 1, W Stok 1, F G Poelma 1, J P Koopman 1, M E Van den Brink 1, M H Bakker 1, W M Eling 1, A C Beynen 1
PMCID: PMC302719  PMID: 8418051

Abstract

Segmented filamentous bacteria (SFBs) are apathogenic autochthonous bacteria in the murine small intestine that preferentially attach to Peyer's patch epithelium. SFBs have never been cultured in vitro. We have studied the effects of SFBs on the immune system of the host. Mice monoassociated with SFBs were compared with germ-free mice and with mice without SFBs but with a specific-pathogen-free (SPF) gut flora. SFBs versus no microbial flora raised the number of lymphoid cells in the lamina propria of the ileal and cecal mucosa, raised the number of immunoglobulin A (IgA)-secreting cells in the intestinal mucosa, produced elevated IgA titers in serum and intestinal secretions, and enhanced the concanavalin A-induced proliferative responses of mesenteric lymph node cells. The SPF flora had effects similar to but less pronounced than those mediated by SFBs. The results indicate that SFBs stimulate the mucosal immune system to a greater extent than do other autochthonous gut bacteria.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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