Host cell translation machinery

The host cell translation machinery is a complex assembly of ribosomes, eukaryotic initiation factors (eIFs), and elongation factors (eEFs) that orchestrates the synthesis of proteins from mRNA templates (Pelletier et al., 2015, Nature Reviews Drug Discovery). This machinery is a critical node for cellular regulation, often hijacked by viral pathogens to prioritize the production of viral proteins over host proteins (Gordon et al., 2020, Nature). In oncology, components of the translation machinery, such as the eIF4F complex, are frequently overexpressed or hyperactivated, driving the translation of oncogenic mRNAs that promote cell survival and proliferation (Bhat et al., 2015, Nature Reviews Drug Discovery). Therapeutic intervention strategies involve small molecules that inhibit specific factors like eIF4A (e.g., zotatifin) or eEF1A (e.g., plitidepsin) to disrupt these pathological processes (White et al., 2021, Science). These inhibitors can selectively target mRNAs with complex 5'-untranslated regions, which are common in oncogenes and viral genomes (Wolfe et al., 2014, Nature). Clinical applications include the treatment of various cancers and broad-spectrum antiviral therapy for RNA viruses like SARS-CoV-2 (White et al., 2021, Science). However, because these components are essential for normal cellular function, drugs targeting the host translation machinery must be carefully dosed to achieve a therapeutic window that spares healthy tissues (Ruggero, 2013, Science Signaling). Safety concerns often involve systemic toxicity and potential immunosuppression due to the global role of protein synthesis (Bhat et al., 2015, Nature Reviews Drug Discovery).

Other names

Protein synthesis machineryTranslational apparatusEukaryotic translation machineryRibosomal machineryHost translational machineryEukaryotic translation apparatus

Inhibition of the eIF4F complex assembly, inhibition of eIF4A helicase activity, or stabilization of the eEF1A-tRNA complex to prevent elongation (Pelletier et al., 2015, Nature Reviews Drug Discovery; White et al., 2021, Science).