Mapping axillary microbiota responsible for body odours using a culture-independent approach

被引:88
作者
Troccaz, Myriam [1 ,2 ]
Gaia, Nadia [3 ]
Beccucci, Sabine [2 ]
Schrenzel, Jacques [1 ,3 ]
Cayeux, Isabelle [2 ]
Starkenmann, Christian [2 ]
Lazarevic, Vladimir
机构
[1] Univ Hosp Geneva, Lab Bacteriol, CH-1211 Geneva 14, Switzerland
[2] Firmenich Co, Corp R&D, CH-1211 Geneva 8, Switzerland
[3] Univ Hosp Geneva, Genom Res Lab, CH-1211 Geneva 14, Switzerland
关键词
Skin; Bacterial communities; 16S rRNA gene sequencing; HUMAN SKIN; PRECURSORS; DIVERSITY; BACTERIA; SWEAT; IDENTIFICATION; PREFERENCES; SECRETIONS; SEQUENCES; TAXONOMY;
D O I
10.1186/s40168-014-0064-3
中图分类号
Q93 [微生物学];
学科分类号
071005 [微生物学];
摘要
Background: Human axillary odour is commonly attributed to the bacterial degradation of precursors in sweat secretions. To assess the role of bacterial communities in the formation of body odours, we used a culture-independent approach to study axillary skin microbiota and correlated these data with olfactory analysis. Results: Twenty-four Caucasian male and female volunteers and four assessors showed that the underarms of non-antiperspirant (non-AP) users have significantly higher global sweat odour intensities and harboured on average about 50 times more bacteria than those of AP users. Global sweat odour and odour descriptors sulfury-cat urine and acid-spicy generally increased from the morning to the afternoon sessions. Among non-AP users, male underarm odours were judged higher in intensity with higher fatty and acid-spicy odours and higher bacterial loads. Although the content of odour precursors in underarm secretions varied widely among individuals, males had a higher acid: sulfur precursor ratio than females did. No direct correlations were found between measured precursor concentration and sweat odours. High-throughput sequencing targeting the 16S rRNA genes of underarm bacteria collected from 11 non-AP users (six females and five males) confirmed the strong dominance of the phyla Firmicutes and Actinobacteria, with 96% of sequences assigned to the genera Staphylococcus, Corynebacterium and Propionibacterium. The proportion of several bacterial taxa showed significant variation between males and females. The genera Anaerococcus and Peptoniphilus and the operational taxonomic units (OTUs) from Staphylococcus haemolyticus and the genus Corynebacterium were more represented in males than in females. The genera Corynebacterium and Propionibacterium were correlated and anti-correlated, respectively, with body odours. Within the genus Staphylococcus, different OTUs were either positively or negatively correlated with axillary odour. The relative abundance of five OTUs (three assigned to S. hominis and one each to Corynebacterium tuberculostearicum and Anaerococcus) were positively correlated with at least one underarm olfactory descriptor. Conclusions: Positive and negative correlations between bacterial taxa found at the phylum, genus and OTU levels suggest the existence of mutualism and competition among skin bacteria. Such interactions, and the types and quantities of underarm bacteria, affect the formation of body odours. These findings open the possibility of developing new solutions for odour control.
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页数:15
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