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A commensal strain of Staphylococcus epidermidis protects against skin neoplasia.


ABSTRACT: We report the discovery that strains of Staphylococcus epidermidis produce 6-N-hydroxyaminopurine (6-HAP), a molecule that inhibits DNA polymerase activity. In culture, 6-HAP selectively inhibited proliferation of tumor lines but did not inhibit primary keratinocytes. Resistance to 6-HAP was associated with the expression of mitochondrial amidoxime reducing components, enzymes that were not observed in cells sensitive to this compound. Intravenous injection of 6-HAP in mice suppressed the growth of B16F10 melanoma without evidence of systemic toxicity. Colonization of mice with an S. epidermidis strain producing 6-HAP reduced the incidence of ultraviolet-induced tumors compared to mice colonized by a control strain that did not produce 6-HAP. S. epidermidis strains producing 6-HAP were found in the metagenome from multiple healthy human subjects, suggesting that the microbiome of some individuals may confer protection against skin cancer. These findings show a new role for skin commensal bacteria in host defense.

SUBMITTER: Nakatsuji T 

PROVIDER: S-EPMC5834004 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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A commensal strain of <i>Staphylococcus epidermidis</i> protects against skin neoplasia.

Nakatsuji Teruaki T   Chen Tiffany H TH   Butcher Anna M AM   Trzoss Lynnie L LL   Nam Sang-Jip SJ   Shirakawa Karina T KT   Zhou Wei W   Oh Julia J   Otto Michael M   Fenical William W   Gallo Richard L RL  

Science advances 20180228 2


We report the discovery that strains of <i>Staphylococcus epidermidis</i> produce 6-<i>N</i>-hydroxyaminopurine (6-HAP), a molecule that inhibits DNA polymerase activity. In culture, 6-HAP selectively inhibited proliferation of tumor lines but did not inhibit primary keratinocytes. Resistance to 6-HAP was associated with the expression of mitochondrial amidoxime reducing components, enzymes that were not observed in cells sensitive to this compound. Intravenous injection of 6-HAP in mice suppres  ...[more]

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