Corynebacterium accolens Releases Antipneumococcal Free Fatty Acids from Human Nostril and Skin Surface Triacylglycerols

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Corynebacterium accolens Releases Antipneumococcal Free Fatty Acids from Human Nostril and Skin Surface Triacylglycerols

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Title: Corynebacterium accolens Releases Antipneumococcal Free Fatty Acids from Human Nostril and Skin Surface Triacylglycerols
Author: Bomar, Lindsey; Brugger, Silvio D.; Yost, Brian H.; Davies, Sean S.; Lemon, Katherine P.

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Citation: Bomar, Lindsey, Silvio D. Brugger, Brian H. Yost, Sean S. Davies, and Katherine P. Lemon. 2016. “Corynebacterium accolens Releases Antipneumococcal Free Fatty Acids from Human Nostril and Skin Surface Triacylglycerols.” mBio 7 (1): e01725-15. doi:10.1128/mBio.01725-15. http://dx.doi.org/10.1128/mBio.01725-15.
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Abstract: ABSTRACT Bacterial interspecies interactions play clinically important roles in shaping microbial community composition. We observed that Corynebacterium spp. are overrepresented in children free of Streptococcus pneumoniae (pneumococcus), a common pediatric nasal colonizer and an important infectious agent. Corynebacterium accolens, a benign lipid-requiring species, inhibits pneumococcal growth during in vitro cocultivation on medium supplemented with human skin surface triacylglycerols (TAGs) that are likely present in the nostrils. This inhibition depends on LipS1, a TAG lipase necessary for C. accolens growth on TAGs such as triolein. We determined that C. accolens hydrolysis of triolein releases oleic acid, which inhibits pneumococcus, as do other free fatty acids (FFAs) that might be released by LipS1 from human skin surface TAGs. Our results support a model in which C. accolens hydrolyzes skin surface TAGS in vivo releasing antipneumococcal FFAs. These data indicate that C. accolens may play a beneficial role in sculpting the human microbiome.
Published Version: doi:10.1128/mBio.01725-15
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4725001/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:24983937
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