Data on transcriptome profiling of circulating microRNAs in dairy cattle

Area of Science:

• Veterinary Science
• Molecular Biology
• Biochemistry

Background:

• MicroRNAs (miRNAs) are small non-coding RNAs found in biofluids, emerging as critical biomarkers.
• Circulating miRNAs in blood offer a non-invasive window into physiological states.
• Pregnancy diagnosis in dairy cattle can benefit from novel molecular markers.

Purpose of the Study:

• To profile and identify pregnancy-associated circulating microRNAs in dairy cattle.
• To compare miRNA expression patterns between normal and pregnant states at different gestational stages.
• To discover potential miRNA biomarkers for early pregnancy detection in dairy cows.

Main Methods:

• Circulating miRNAs were isolated from blood samples of healthy dairy cows.
• Next-generation sequencing (Illumina RNA-Seq) was employed for miRNA profiling.
• Differential gene expression (DEG) analysis was performed to identify significant miRNA changes.

Main Results:

• Analysis of 30 days of pregnancy (DOP) revealed perturbations in miRNA expression compared to normal states.
• Comparison between normal and 60 DOP libraries identified 147 known miRNAs with differential expression.
• Stage-specific miRNAs associated with pregnancy were predicted.

Conclusions:

• Circulating miRNA profiles change significantly during dairy cattle pregnancy.
• Specific miRNAs identified at 60 DOP hold potential as biomarkers for pregnancy.
• Further validation of these miRNAs could lead to improved pregnancy diagnostics in cattle.