Non-coding RNAs in schistosome reproductive maturation.

Area of Science:

• Parasitology
• Molecular Biology
• Gene Regulation

Background:

• Schistosome pathology and transmission depend on female egg production, making reproductive competence a key biological issue.
• Female schistosome maturation requires prolonged male pairing, indicating a pairing-dependent developmental state rather than simple mating.
• While traditionally studied via protein-coding genes and signaling, non-coding RNAs (ncRNAs) are emerging as critical regulators.

Purpose of the Study:

• To review and re-examine schistosome non-coding RNAs (ncRNAs), including miRNAs, lncRNAs, and emerging classes.
• To integrate ncRNA findings within a framework of pairing-dependent female maturation in schistosomes.
• To highlight the underappreciated regulatory role of ncRNAs in schistosome reproductive biology.

Main Methods:

• Literature review and synthesis of existing studies on schistosome ncRNAs.
• Analysis of cataloguing, functional, and perturbation experiments for miRNAs and lncRNAs.
• Examination of life-cycle profiling, single-cell datasets, and chromatin analyses for ncRNA roles.

Main Results:

• MicroRNAs (miRNAs) show the strongest evidence, with specific molecules linked to ovarian development, egg production, and Wnt signaling.
• Long non-coding RNAs (lncRNAs) are mechanistically less understood but suggested to maintain adult homeostasis and fertility.
• Emerging ncRNA classes like circRNAs offer novel insights into schistosome maturation, with potential for inter-worm transfer.

Conclusions:

• ncRNAs represent a significant regulatory layer in schistosome female reproductive maturation.
• miRNAs and lncRNAs play distinct but crucial roles, complementing traditional regulatory models.
• Further investigation into ncRNA-mediated regulation, including potential transfer, is vital for understanding schistosome biology and control.