X-linked inhibitor of apoptosis protein (XIAP) messenger RNA (XIAP mRNA)

X-linked inhibitor of apoptosis protein (XIAP) messenger RNA is the transcript responsible for the production of XIAP, the most potent member of the inhibitor of apoptosis protein (IAP) family (UniProt: P98170). The resulting protein is unique among IAPs for its ability to directly bind and inhibit both initiator and effector caspases, including caspase-3, -7, and -9 (NCBI Gene: 331). High levels of XIAP mRNA and protein are frequently observed in various cancers, where they contribute to tumor cell survival and resistance to apoptosis-inducing therapies (PMID: 19435821). Consequently, XIAP mRNA has emerged as a strategic therapeutic target for antisense oligonucleotides and RNA interference technologies. By promoting the degradation of XIAP mRNA, these drugs reduce the intracellular concentration of XIAP protein, thereby sensitizing cancer cells to chemotherapy. Clinical investigations, such as those involving the antisense oligonucleotide AEG35156, have explored this mechanism in patients with solid tumors and leukemia (PMID: 17545531). While promising, targeting mRNA requires efficient delivery systems to ensure the stability and uptake of the therapeutic molecules into target tissues. Monitoring XIAP levels and caspase activation serves as a vital component in assessing the pharmacodynamic effect of these mRNA-targeting agents.

Other names

BIRC4 mRNAIAP3 mRNAAPI3 mRNAX-linked IAP mRNABaculoviral IAP repeat-containing protein 4 mRNA

Antisense-mediated degradation of mRNA via RNase H or RNA interference (RNAi) leading to the inhibition of protein translation.