Toll-like receptor 4 messenger RNA (TLR4 mRNA) (TLR4 mRNA)

Toll-like receptor 4 (TLR4) messenger RNA (mRNA) is the nucleic acid transcript that encodes the TLR4 protein, a vital pattern recognition receptor of the innate immune system (NCBI Gene ID: 7099). The resulting TLR4 protein is responsible for detecting lipopolysaccharide (LPS) from Gram-negative bacteria and various endogenous danger signals, which triggers the production of pro-inflammatory cytokines (UniProt: P33765). Targeting the TLR4 mRNA using RNA-based therapeutics, such as small interfering RNA (siRNA) or antisense oligonucleotides (ASOs), allows for the specific downregulation of TLR4 expression at the pre-translational level. This therapeutic approach is being explored for treating inflammatory conditions like sepsis, chronic pain, and autoimmune disorders where TLR4 signaling is pathologically elevated (PubMed: 31434158). By silencing the mRNA, the total pool of functional TLR4 receptors is reduced, potentially offering a more durable anti-inflammatory effect than traditional protein-level inhibitors. However, challenges remain regarding the efficient delivery of these nucleic acids to target tissues and the potential for off-target effects or unintended immune activation.

Other names

CD284 mRNAToll-like receptor 4 transcriptTLR4 mRNA

The primary mechanism involves the degradation of the TLR4 mRNA transcript through the RNA-induced silencing complex (RISC) for siRNA or RNase H-mediated cleavage for antisense oligonucleotides (ASOs), thereby preventing the translation of the TLR4 protein and inhibiting downstream inflammatory signaling (PubMed: 30253155).