The Long Non-Coding RNAs: A New (P)layer in the "Dark Matter"

Area of Science:

• Molecular Biology
• Genomics
• Epigenetics

Background:

• The cell's transcriptome comprises diverse RNA molecules, including non-coding RNAs (ncRNAs).
• Advances in sequencing reveal the genome's extensive transcription into various ncRNAs, whose significance was underestimated.
• Long non-coding RNAs (lncRNAs) are a numerous and functionally diverse class of ncRNAs.

Purpose of the Study:

• To review current catalogs of annotated long non-coding RNAs (lncRNAs).
• To summarize recent advancements in understanding the function and regulation by lncRNAs.
• To highlight the role of lncRNAs in epigenetic gene regulation and human diseases.

Main Methods:

• Review of existing literature and databases on annotated long non-coding RNAs (lncRNAs).
• Analysis of recent experimental studies investigating lncRNA functions.
• Synthesis of findings related to lncRNA involvement in epigenetic mechanisms.

Main Results:

• The vast majority of the genome is transcribed, producing a complex population of ncRNAs.
• A growing number of experimentally studied lncRNAs are identified as key regulators of epigenetic gene expression.
• lncRNAs are implicated in significant human diseases, including cancer and neurodegeneration.

Conclusions:

• Long non-coding RNAs (lncRNAs) represent a critical and functionally diverse class of regulatory molecules.
• Emerging evidence establishes lncRNAs as crucial players in epigenetic gene regulation in mammalian cells.
• The study of lncRNAs is vital for understanding and potentially treating human diseases.