Kefir-derived soy-adapted lactic acid bacteria
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB52922 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR9784840_1.fastq.gz | Fastqsanger.gz | |||
| ERR9784840_2.fastq.gz | Fastqsanger.gz | |||
| ERR9784841_1.fastq.gz | Fastqsanger.gz | |||
| ERR9784841_2.fastq.gz | Fastqsanger.gz | |||
| ERR9784842_1.fastq.gz | Fastqsanger.gz |
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Project description:Use of kefir-derived soy-adapted lactic acid bacteria for the preparation of a fermented soy drink with increased estrogenic activity
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Project description:We got insights into the B. bifidum PRL2010 genes whose expression resulted to be affected when bacterial cells were cultivated on kefir and kefiran as the unique carbon source.
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Project description:We got insights into the B. bifidum PRL2010 genes whose expression resulted to be affected when bacterial cells were cultivated on kefir and kefiran as the unique carbon source. In order to exploit the transcriptome of PRL2010 grown on kefir and hefiran we performed global transcription profiling using PRL2010 microarrays hybridized with cDNA from the RNA samples of B. bifidum PRL2010 cultivated on these substrates. We isolated mRNA from B. bifidum PRL2010 cells collected from a culture of kefir grains and from PRL2010 cultivated on MRS plus kefiran at upon 12 hours following inoculation. Microarray analysis was performed with an oligonucleotide array based on the B. bifidum PRL2010 genome: a total of 8,130 oligonucleotide probes of 60bp in length were designed on 1707 ORFs using eArray5.0 (Agilent Technologies). 5 Oligos were designed for each gene on a 4x44k Agilent Microarrays(Agilent Technologies, Santa Clara, CA, USA). Replicates were distributed on the chip at random, non-adjacent positions.
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Project description:To understand the complex mechanism of estrogen action, multiple assays based on different biological principles is important. Here, multiple assays based on cell, protein and transcription assays were used to evaluate estrogenic activity of soymilk extracts before and after fermentation, and four soy compounds, genistein and daidzein, and their glycosides, genistin and daidzin, respectively. The data obtained by a transcription assay, RNA-sequencing (RNA-seq), was further examined by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) database analysis to understand cell functions, i.e. biological processes and metabolic pathways. Among the cell functions identified, the sets of genes for cell division/cell cycle and DNA replication/DNA repair are significantly up-regulated, whereas those for autophagy are significantly down-regulated, which explains well the enhanced activity of cell proliferation by these materials. The applications of estrogenic activity of soymilk extracts and soy flavonoids, and the contribution of fermentation, include pharmacological benefits, such as bone protection/bone regeneration, cancer chemoprevention, neuroprotection and the treatment of menopausal syndromes.
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Project description:Estrogenic activity of fermented soymilk extracts and soy compounds
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Project description:The majority of babies in the US are formula-fed instead of breast fed. There are major differences in the composition of formulas and breast milk and yet little is known about metabolic differences in babies as the result of feeding these very different diets and how that might affect development or disease risk in later life. One concern is that soy-based formulas might have adverse health effects in babies as a result of the presence of low levels of estrogenic phytochemicals genistein and daidzein which are normally present in soy beans. In the current study, we used a piglet model to look at this question. Piglets were either fed breast milk from the sow or were fed two different infant formulas (cow's milk-based or soy-based) from age 2 days to 21 days when pigs are normally weaned onto solid food. Blood glucose and lipids were measured. Formula-fed pigs were found to have lower cholesterol than breast fed piglets and in addition had larger stores of iron in their liver.Microarray analysis was carried out to see if changes in liver gene expression could explain these effects of formula feeding. It was found that overall gene expression profiles were influenced by formula feeding compared to breast fed neonates. Gender-independent and unique effects of formula influenced cholesterol and iron metabolism. Further, soy formula feeding in comparison to milk-based formula failed to reveal any estrogenic actions on hepatic gene expression in either male or female pigs. Piglets (female, male) were either fed breast milk from the sow or were fed two different infant formulas (cow's milk-based or soy-based) from age 2 days to 21 days when pigs are normally weaned onto solid food.
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