Application of small interfering RNA technology in cytochrome P450 gene modulation.

Cytochrome P450 plays key roles in the biotransformation of endogenous and exogenous chemicals including drugs and environmental pollutants. The inhibition and downregulation of P450s can have therapeutic effects, and/or modulate drug metabolism. P450s are largely inhibited by small molecules; however, this strategy is often hampered by intrinsic toxicity and drug-drug interactions. Furthermore, it is challenging for small molecules to exhibit high selectivity and inhibitory efficiencies. Recently, small interfering RNA (siRNA) technology has demonstrated the potential for P450 modulation. Examples of recent applications of siRNAs in P450 gene modulation, in vitro and in vivo, are highlighted in this review. The necessity of siRNA techniques and their advantages as P450 modulators are discussed, along with a review of current obstacles and a perspective on future advancements. SIGNIFICANCE STATEMENT: This article reviews studies on the application of small interfering RNA technology to cytochrome P450 gene modulation. The necessity of siRNA methods and the benefits of their use as P450 modulators have been suggested by comparison with small-molecule drugs. Additionally, the challenges that presently limit the broader implementation of this topic are examined, and a perspective for future developments is proposed.