Circular RNAs in Pregnancy and the Placenta

Area of Science:

• Molecular Biology
• Genetics
• Reproductive Biology

Background:

• Circular RNAs (circRNAs) are increasingly recognized for their roles in cancer development and function.
• While circRNA research is advancing, a comprehensive understanding of their biological roles, including in healthy and pathological states, remains limited.
• Emerging evidence highlights novel functions of circRNAs during pregnancy, particularly within the placenta.

Purpose of the Study:

• To review the known roles of circRNAs in pregnancy and placental biology.
• To explore the parallels between circRNA production in cancer and the placenta.
• To investigate differential placental expression of circRNAs in complicated versus uncomplicated pregnancies.

Main Methods:

• Literature review of existing studies on circRNAs in cancer, pregnancy, and placental development.
• Comparative analysis of gene expression patterns related to circRNA biogenesis in cancer and placenta.
• Examination of studies reporting differential circRNA expression in pregnancy complications.

Main Results:

• Genes involved in circRNA production in cancer are often highly expressed in the placenta, suggesting shared biogenesis mechanisms.
• Placental development shares characteristics with 'controlled cancer,' indicating potential overlapping roles for circRNAs.
• Differential expression patterns of placental circRNAs exist between complicated and uncomplicated pregnancies.

Conclusions:

• CircRNAs play significant roles in placental development and pregnancy success.
• Studying circRNAs in the placenta offers a unique model with implications for both reproductive health and cancer research.
• Understanding placental circRNA expression can help identify biomarkers for pregnancy complications.