Noncoding RNAs in DNA repair and genome integrity

Area of Science:

• Genomics
• Molecular Biology
• RNA Biology

Background:

• Noncoding RNAs (ncRNAs) are increasingly recognized for their critical roles in gene expression regulation.
• These roles span normal development, stress responses, and the pathogenesis of human diseases.

Purpose of the Study:

• To highlight the significance of noncoding RNAs (ncRNAs) beyond the 1-2% of the human genome that codes for proteins.
• To emphasize the importance of deciphering the functions of the vast majority of the genome transcribed into ncRNAs.

Main Methods:

• High-throughput transcriptome sequencing technologies have revealed extensive transcription across the genome.
• Classification of regulatory ncRNAs includes microRNAs (miRNAs), Piwi-interacting RNAs (piRNAs), small interfering RNAs (siRNAs), small nucleolar RNAs (snoRNAs), and long noncoding RNAs (lncRNAs).

Main Results:

• Approximately 90% of the human genome is transcribed, primarily into ncRNAs.
• While some ncRNAs' roles in DNA repair and genome instability are emerging, their functions remain largely unknown.

Conclusions:

• Identifying and characterizing the complete profile of ncRNAs is a major goal in modern biology.
• Understanding ncRNA functions is essential for elucidating normal physiology and human disorders.
• Clinically relevant ncRNAs hold potential for therapeutic applications.