Cutaneous leishmaniasis, a parasitic disease caused by Leishmania major, is a widely frequent form in humans. To explore the importance of the host gut microbiota and to investigate its changes during L. major infection, two different groups of mouse models were assessed. The microbiome of two parts of the host gut-ileum and colon-from infected and non-infected mice were characterised by sequencing of 16S rDNA using an Ion Torrent PGM platform. Microbiome analysis was performed to reveal changes related to the susceptibility and the genetics of mice strains in two different gut compartments and to compare the results between infected and non-infected mice. The results showed that Leishmania infection affects mainly the ileum microbiota, whereas the colon bacterial community was more stable. Different biomarkers were determined in the gut microbiota of infected resistant mice and infected susceptible mice using LEfSe analysis. Lactobacillaceae was associated with resistance in the colon microbiota of all resistant mice strains infected with L. major. Genes related to xenobiotic biodegradation and metabolism and amino acid metabolism were primarily enriched in the small intestine microbiome of resistant strains, while genes associated with carbohydrate metabolism and glycan biosynthesis and metabolism were most abundant in the gut microbiome of the infected susceptible mice. These results should improve our understanding of host-parasite interaction and provide important insights into the effect of leishmaniasis on the gut microbiota. Also, this study highlights the role of host genetic variation in shaping the diversity and composition of the gut microbiome. KEY POINTS: • Leishmaniasis may affect mainly the ileum microbiota while colon microbiota was more stable. • Biomarkers related with resistance or susceptibility were determined in the gut microbiota of mice. • Several pathways were predicted to be upregulated in the gut microbiota of resistant or susceptible mice.
- MeSH
- biologické markery MeSH
- Leishmania major * MeSH
- leishmanióza kožní * MeSH
- lidé MeSH
- myši MeSH
- náchylnost k nemoci mikrobiologie MeSH
- střevní mikroflóra * MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Melanoma is the least common form of skin tumor, but it is potentially the most dangerous and responsible for the majority of skin cancer deaths. We suggest that the skin microbiome might be changed during the progression of melanoma. The aim of this study is to compare the composition of the skin microbiota between different locations (skin and melanoma) of a MeLiM (Melanoma-bearing Libechov Minipig) pig model (exophytic melanoma). Ninety samples were used for PCR-DGGE analysis with primers specifically targeting the V3 region of the 16S rRNA gene. The profiles were used for cluster analysis by UPGMA and principal coordinate analysis PCoA and also to calculate the diversity index (Simpson index of diversity). By comparing the obtained results, we found that both bacterial composition and diversity were significantly different between the skin and melanoma microbiomes. The abundances of Fusobacterium and Trueperella genera were significantly increased in melanoma samples, suggesting a strong relationship between melanoma development and skin microbiome changes.
- MeSH
- Bacteria klasifikace izolace a purifikace MeSH
- DNA bakterií genetika MeSH
- DNA primery MeSH
- Fusobacterium genetika izolace a purifikace MeSH
- genetická variace MeSH
- kůže mikrobiologie MeSH
- melanom mikrobiologie patologie MeSH
- mikrobiota * MeSH
- miniaturní prasata MeSH
- modely nemocí na zvířatech MeSH
- prasata MeSH
- RNA ribozomální 16S genetika MeSH
- sekvenční analýza DNA MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
A feeding study was performed to monitor the effect of chitosan intake on the fecal microbiota of ten healthy human subjects. Diversity of microflora was monitored during 8 weeks including 4 weeks of chitosan supplementations. Using denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA gene amplicons and quantitative PCR method we revealed possible changes originating in the overall bacterial composition and also in the subpopulation of Bifidobacterium group. DGGE profiles displayed high complexity and individuality for each subject. Considerable variations in the composition of band patterns were observed among different persons. A raised level of fecal Bacteroides in response to chitosan intake was found in all samples. Bifidobacterium levels following chitosan intake increased or remain unchanged. Non-significant increase was, surprisingly, found in the numbers of butyrate-producing bacteria.
- MeSH
- Bacteroides genetika izolace a purifikace MeSH
- Bifidobacterium genetika izolace a purifikace MeSH
- biodiverzita MeSH
- chitosan metabolismus MeSH
- denaturace nukleových kyselin MeSH
- DNA bakterií genetika MeSH
- dospělí MeSH
- elektroforéza v polyakrylamidovém gelu MeSH
- experimenty na lidech MeSH
- feces mikrobiologie MeSH
- financování organizované MeSH
- lidé středního věku MeSH
- lidé MeSH
- polymerázová řetězová reakce MeSH
- ribozomální DNA genetika MeSH
- RNA ribozomální 16S genetika MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
The influence of geographic location, season, age, and part of the digestive tract on bacterial diversity was evaluated on intestinal microflora of honeybees, wasps, and cockroaches using DGGE analysis. PCR-DGGE analyses with universal bacterial primers targeting 200-bp region of the 16S rDNA gene afforded the profile of complex bacterial DNA; specific primers were used to determine the profile of bifidobacteria whose concentration in digestive tract was determined by real-time PCR. Selected PCR products were identified by sequencing. The microflora of the bees exhibited little variations among the hives from distant locations. Their bifidobacterial population formed 2.8-8.4 % of total bacteria and was very homogeneous. The total gut microflora of wasps was also homogeneous, only two samples being affected by the season or the location; on the other hand, wasp bifidobacterial population was very heterogeneous. Cockroaches showed the highest variations in microflora composition, the age and diet being the ultimate factors; bifidobacteria counts also varied among tested individuals (0.1-34.1 % of total bacteria). Our results suggest that nutrition habits are the strongest factor affecting the insect microflora, giving higher variations to omnivorous species.
- MeSH
- Bacteria genetika izolace a purifikace klasifikace MeSH
- Bifidobacterium genetika izolace a purifikace MeSH
- DNA bakterií analýza izolace a purifikace MeSH
- genetická variace MeSH
- hmyz mikrobiologie MeSH
- polymerázová řetězová reakce metody MeSH
- ribozomální DNA analýza MeSH
- RNA ribozomální 16S genetika MeSH
- sršňovití mikrobiologie MeSH
- střeva mikrobiologie MeSH
- švábi mikrobiologie MeSH
- včely mikrobiologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- MeSH
- ankylózující spondylitida genetika MeSH
- autoimunitní nemoci genetika MeSH
- celiakie genetika MeSH
- diabetes mellitus 1. typu genetika MeSH
- genetická predispozice k nemoci genetika MeSH
- genetické techniky využití MeSH
- HLA antigeny genetika imunologie klasifikace MeSH
- hlavní histokompatibilní komplex imunologie účinky léků MeSH
- klinické laboratorní techniky trendy MeSH
- lidé MeSH
- revmatoidní artritida genetika MeSH
- Check Tag
- lidé MeSH
