Circular RNA rno_circ_0004002 regulates cell proliferation, apoptosis, and epithelial-mesenchymal transition through...

Area of Science:

• Developmental Biology
• Molecular Biology
• Genetics

Background:

• Circular RNAs (circRNAs) are novel noncoding RNAs with regulatory roles in various diseases.
• Anorectal malformations (ARM) are congenital conditions requiring investigation into their underlying molecular mechanisms.

Purpose of the Study:

• To investigate the role of circRNAs in the development of anorectal malformations (ARM).
• To identify specific circRNAs involved in ARM pathogenesis and elucidate their regulatory mechanisms.

Main Methods:

• High-throughput sequencing to identify differentially expressed circRNAs in ARM tissues.
• Quantitative reverse transcription polymerase chain reaction (qRT-PCR) for expression analysis.
• Bioinformatic prediction and luciferase reporter assays to determine molecular interactions.
• In vitro functional assays (cell proliferation, apoptosis, EMT) and rescue experiments.

Main Results:

• 78 differentially expressed circRNAs were identified in ARM tissues, with rno_circ_0004002 being a key downregulated candidate.
• Silencing rno_circ_0004002 affected cell proliferation, apoptosis, and epithelial-mesenchymal transition (EMT) during anorectal development.
• rno_circ_0004002 acts as a sponge for miR-342-5p, which targets Wnt3a, thus regulating Wnt3a expression.
• miR-342-5p expression was upregulated, and Wnt3a expression was downregulated in ARM tissues during critical developmental periods (GD19 and GD21).

Conclusions:

• The circRNA rno_circ_0004002 plays a crucial role in anorectal development by regulating cell proliferation, apoptosis, and EMT through the miR-342-5p/Wnt3a axis.
• The identified rno_circ_0004002/miR-342-5p/Wnt3a pathway represents a potential therapeutic target for anorectal malformations.
• Gestational days 19 and 21 are critical time points in the progression of ARM, highlighting the importance of early detection and intervention.