New insights into transcriptome variation during cattle adipocyte adipogenesis by direct RNA sequencing

Area of Science:

• Molecular Biology
• Genomics
• Animal Science

Background:

• Adipogenesis regulation in cattle is complex.
• Understanding gene expression dynamics is crucial for livestock improvement.

Purpose of the Study:

• To comprehensively analyze cattle adipocyte transcriptomes using direct RNA sequencing (DRS).
• To investigate the roles of alternative splicing, poly(A) tail length, and mRNA modifications in adipogenesis.

Main Methods:

• Direct RNA sequencing (DRS) and PCR-amplified cDNA sequencing.
• Analysis of alternative splicing, poly(A) tail length, and mRNA modifications.
• Differential gene expression analysis.

Main Results:

• 68,124 transcripts were identified, revealing extensive alternative splicing.
• Poly(A) tails were globally shorter in differentiated adipocytes.
• Significant discrepancies were observed between gene and transcript expression levels for differentially expressed genes (DEGs).
• Potential roles for mRNA modifications in gene expression and splicing were implied.

Conclusions:

• Alternative splicing significantly expands transcript diversity during cattle adipogenesis.
• Poly(A) tail length and mRNA modifications are key regulatory factors in adipocyte differentiation.
• DRS offers advantages over traditional methods for transcriptomic analysis, avoiding artificial transcripts.