Transcriptome analysis of miRNAs during myoblasts adipogenic differentiation

Area of Science:

• Animal Science
• Molecular Biology
• Genetics

Background:

• Intramuscular fat (IMF) content significantly impacts meat quality and is highly heritable.
• MicroRNAs (miRNAs) are small non-coding RNAs crucial for regulating adipogenesis (fat development).
• miRNAs can serve as valuable molecular markers for meat quality traits.

Purpose of the Study:

• To screen for differentially expressed miRNAs during myoblast adipogenic differentiation.
• To identify potential miRNA biomarkers for intramuscular fat deposition.
• To explore the role of miRNAs in regulating adipogenesis.

Main Methods:

• Utilized an in vitro model of myoblast adipogenic differentiation.
• Employed RNA sequencing (RNA-seq) to screen for differential miRNAs.
• Validated selected miRNAs using RT-qPCR (reverse transcription quantitative polymerase chain reaction).
• Performed functional enrichment analysis on miRNA target genes.

Main Results:

• Identified 71 differentially expressed miRNAs (31 up-regulated, 40 down-regulated).
• Validated key adipogenesis-related miRNAs, including miR-146a-5p, miR-210-3p, miR-199a, miR-224, and miR-214-3p.
• Found miRNA target genes enriched in insulin and MAPK signaling pathways, critical for adipogenesis.

Conclusions:

• The identified differentially expressed miRNAs are involved in intramuscular fat deposition.
• These miRNAs hold promise as biomarkers for enhancing meat quality through animal breeding.
• Further research into miRNA functions can advance our understanding of fat deposition.