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. 1986 Sep;53(3):641–645. doi: 10.1128/iai.53.3.641-645.1986

Biliary lipids support serum-free growth of Giardia lamblia.

F D Gillin, M J Gault, A F Hofmann, D Gurantz, J F Sauch
PMCID: PMC260841  PMID: 3744557

Abstract

Giardia lamblia has been grown in vitro only in media containing serum or serum fractions. How this pathogen can grow in the human small intestinal lumen without serum is not known. We found that samples of human hepatic or gall bladder bile maintained G. lamblia survival for 24 to 48 h in medium without serum but did not support growth. By contrast, an artificial biliary lipid dispersion containing six bile salts, phosphatidylcholine (PC), and cholesterol, in the ratios characteristic of human bile, supported parasite growth in medium without serum or serum fractions. To define the requirements, we showed that 1-palmitoyl-2-linoleoyl-PC or 1-palmitoyl-2-oleoyl-PC (which predominate in human bile) satisfied the requirement for PC. Moreover, either glycocholate or glycodeoxycholate could be substituted for the bile salt mixture. The finding that biliary lipids can support serum-free growth of G. lamblia may help explain why this parasite colonizes the upper small intestine.

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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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