RNAa: Mechanisms, therapeutic potential, and clinical progress

Area of Science:

• Molecular Biology
• Gene Regulation
• Therapeutics

Background:

• RNA activation (RNAa) is a gene regulatory mechanism involving small activating RNAs (saRNAs) and microRNAs (miRNAs).
• Unlike RNA interference (RNAi) that silences genes, RNAa upregulates gene expression transcriptionally via the RNA-induced transcriptional activation (RITA) complex.
• Endogenous microRNAs exhibit dual functionality, participating in RNAa (mi-RNAa) and influencing cellular processes and disease.

Purpose of the Study:

• To review the mechanisms of RNA activation.
• To highlight recent advancements in microRNA-mediated RNAa (mi-RNAa).
• To discuss the therapeutic development of saRNAs.

Main Methods:

• Literature review of RNA activation mechanisms.
• Analysis of studies on saRNA and miRNA functions in gene regulation.
• Examination of clinical advancements in RNAa-based therapeutics.

Main Results:

• saRNAs can stably upregulate target gene expression at the transcriptional level.
• Emerging evidence supports saRNAs as a therapeutic strategy for metabolic disorders, hearing loss, tumors, and Alzheimer's disease.
• Clinical development includes saRNA drug candidates like MTL-CEBPA for hepatocellular carcinoma and RAG-01 for bladder cancer.

Conclusions:

• RNAa represents a promising gene activation strategy with significant therapeutic implications.
• Further research into mi-RNAa and saRNA development is crucial for advancing RNAa-based therapies.
• The clinical success of saRNA candidates underscores the therapeutic potential of RNA activation.