RNA splicing regulated by RBFOX1 is essential for cardiac function in zebrafish

Area of Science:

• Molecular Biology
• Genetics
• Cardiovascular Biology

Background:

• Alternative splicing generates proteomic diversity in eukaryotes.
• The splicing machinery and its regulators are complex and not fully understood.
• The functional impact of alternatively spliced transcripts on cellular function requires further investigation.

Purpose of the Study:

• To investigate the in vivo functional role of the splicing regulator rbfox1.
• To determine the consequences of rbfox1 loss on cardiac function.
• To identify target genes affected by rbfox1 depletion in zebrafish.

Main Methods:

• Zebrafish model system for in vivo studies.
• Cardiac function assessment.
• Deep-transcriptome sequencing (RNA-Seq).
• Quantitative real-time PCR (qRT-PCR).

Main Results:

• Loss of rbfox1 resulted in progressive cardiac contractile dysfunction and heart failure.
• rbfox1 depletion altered the expression of crucial target genes, including actn3a and hug.
• Specific isoform changes were identified in affected genes.

Conclusions:

• Tightly regulated alternative splicing is essential for normal cardiac function.
• The splicing regulator rbfox1 plays a critical role in maintaining heart health.
• rbfox1 is a potential therapeutic target for human heart failure and cardiomyopathy.