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Transcriptional profiling of milk epithelial cells of Kashmiri and Jersey cattle

ABSTRACT: Transcriptional profiling of milk epithelial cells of Kashmiri and Jersey cattle

PROVIDER: PRJNA419906 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6324370_1.fastq.gz	Fastqsanger.gz
	SRR6324370_2.fastq.gz	Fastqsanger.gz
	SRR6324380_1.fastq.gz	Fastqsanger.gz
	SRR6324380_2.fastq.gz	Fastqsanger.gz
	SRR6324371_1.fastq.gz	Fastqsanger.gz

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Transcriptional profiling of milk epithelial cells of Kashmiri and Jersey cattle

Project description:The purpose of the present study was to provide a comprehensive transcriptome profiling of mammary gland and to find the key differences in the milk production and related traits between Jersey and Kashmiri cattle. Casein and whey protein genes were found to be highly expressed throughout the lactation cycle. Largest differences in DEGs was reported between D15 and D90 with 1805 genes in Kashmiri cattle and between D15 and D250 with 3392 genes in Jersey cattle.

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Comparison of Holstein and Jersey day 6 embryos

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Comparative Study of the Expression Profiles of miRNAs of Milk-Derived Exosomes of Yak and Jeryak

Project description:The Jeryak is the hybrid offspring of yaks and Jersey cattle and exhibit improved milk and meat yields. Biomolecules carried within milk exosomes are important for cell growth, development, immune regulation, and various pathophysiological processes. Previous studies showed that miRNAs regulate mammary gland development, lactation, and milk quality. This study explored the relationship between milk exosomes miRNAs and lactation performance. A comparison of the milk content showed that yak milk was of a better quality compared to Jeryak milk (casein, fat, TS, SNF, lactose). Milk collected in December was superior to that collected in June for both yak and Jeryak, except for lactose concentrations. Exosomes were extracted by density gradient centrifugation and miRNA expression profiles in milk exosomes from three yaks and three Jeryaks collected in June and December were detected by small RNA sequencing. In all, 22, 120, 78, and 62 differentially expressed miRNAs (DEMs) were identified in Jun_ JY vs. Jun_ Y (P1: Jeryak in June vs. Yak in June), Jun_ JY vs. Dec_ JY (P2: Jeryak in June vs. Jeryak in December), Dec_ JY vs. Dec_ Y (P3: Jeryak in December vs. Yak in December), and Jun_ Y vs. Dec_ Y (P4: Yak in June vs. Yak in December) groups. These DEMs were enriched in functions and signaling pathways related to lactation performance. In conclusion, these findings are a reference tool to study the molecular basis of lactation performance.

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Project description:In this study, we use mRNA-Seq to characterize and compare the leukocyte transcriptomes of Holstein, Jersey, and Cholistani with respect to variations in sequence, expression, and splicing. Poly A+ RNA are extracted from leukocytes of pools of blood drawn from cows of three different breeds, Holstein, Jersey, and Cholistani. The objective of the study is to compare sequence variation and gene expression of the three cattle breeds.

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Project description:The objectives of the study were to use RNA-Seq to examine the effect of (i) breed and (ii) gradual weaning, on the whole blood mRNA transcriptome of artificially reared Holstein-Friesian and Jersey calves. The calves were gradually weaned over 14 days (day (d) -13 to d 0) and mRNA transcription was examined one day before gradual weaning was initiated (d -14), one day after weaning (d 1) and 8 days after weaning (d 8). RNA-seq analysis was carried out on RNA extracted from whole blood. Gradual weaning had no effect on gene expression (P>0.05).There were 550 differentially expressed genes at a false discovery rate of 10% and with a â¥1.5-fold change, between Holstein-Friesian and Jersey calves on d -14, 490 on d 1, and 411 on d 8. GOseq/KEGG pathway analysis showed that the cytokine-cytokine receptor interaction pathway and the neuroactive ligand-receptor interaction pathway were over-represented between breeds on all days (P<0.01; Qâ¤0.1). These results demonstrate that the gradual weaning practiced here does not compromise the welfare of artificially-reared dairy calves, evidenced by the lack of expression changes in any genes in response to gradual weaning. These data also suggest differences in cell signalling and immune responses between breeds. Eight Holstein-Friesian and eight Jersey bull calves were group housed indoors and individually fed milk replacer and concentrate using an automatic feeder. Calves were gradually weaned by reducing milk-replacer from 6 litres to 0 litres over 14 days (d) (d -13 to d 0). Calves were blood sampled on d -14, 1, and 8, relative to weaning (d 0). RNA-seq analysis was carried out on RNA extracted from whole blood.

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