Storing experiment
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB76042 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR13166200_1.fastq.gz | Fastqsanger.gz | |||
| ERR13166200_2.fastq.gz | Fastqsanger.gz | |||
| ERR13166300_1.fastq.gz | Fastqsanger.gz | |||
| ERR13166300_2.fastq.gz | Fastqsanger.gz | |||
| ERR13166201_1.fastq.gz | Fastqsanger.gz |
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Project description:Human breast milk (HBM) is the ideal source of nutrients for infants and is rich in microRNA (miRNA). In recent years, expressed breast milk feeding rather than direct breastfeeding is becoming increasingly prevalent for various reasons. HBM requires storage and processing, which can cause various changes in the ingredients. We investigated how the miRNAs in HBM change due to processes often used in real life. HBM samples collected from 10 participants were each divided into 7 groups according to the storage temperature, thawing method, and storage period. And we analyzed the miRNA changes in each group. Significant changes in expression of several miRNAs were confirmed when HBM were heated by microwave immediately after collection, stored at room temperature for 1 week, or frozen for 1 week. Changes in expression were also dependent on the frozen period or thawing method. However, there was no change in the miRNA expression in all samples refrigerated for 1 week. The expression of miRNA can change depending on the diverse processing, storage, and thawing methods of breast milk, and refrigerated storage may be an ideal method to maintain a state of miRNA.
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Project description:A transcriptome analysis was applied on two peach (Prunus persica L.) cultivars with different sensitivity to low temperature regimes to identify cold-responsive genes that might be involved in tolerance to long low temperature storage. Peach fruit from ‘Morettini No2’ and ‘Royal Glory’, a sensitive and a tolerant, to chilling injury cultivars, respectively, were harvested at commercial maturity stage and allowed to ripen at room temperature (25°C) or subjected to 4 and 6-weeks of cold storage (0°C, 95% R.H.) followed by ripening at room temperature. Microarray experiments, employing the peach microarray platform (μ PEACH 1.0), were carried out by comparing harvested fruit against 4- and 6-week cold-stored fruit. The analysis identified 173 and 313 genes that were differentially expressed in ‘Morettini No2’ and ‘Royal Glory’ fruit after 4 weeks, respectively. However, the 6 weeks cold storage provoked a decrease in the total number of genes differentially expressed in both cultivars. RNA blot analysis validated the differential expression of certain genes showed in microarray data. Among these genes, two heat shock proteins (hsps), a putative β-D-xylosidase, an expansin, a dehydrin and a pathogenesis-related protein PR-4B precursor were induced during cold storage in both cultivars. The induction of hsps and the putative β-D-xylosidase appeared to be independent on the duration of postharvest treatment. On the other hand, transcript levels of lipoxygenase were quite constant during postharvest ripening, while a strong reduction or disappearance was observed after cold storage. A dehydration-induced RD22-like protein showed a reduction in the accumulation of transcripts during postharvest ripening independently on the temperature conditions. Overall, the current study shed some light on the molecular aspects of cold stress in peach fruit quality and identified some ripening and/or cold-induced genes which function need further elucidation.
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