Host cellular translation machinery

The host cellular translation machinery is a complex, multi-component system consisting of ribosomes, transfer RNAs (tRNAs), and various translation initiation, elongation, and termination factors (Source: Nature Reviews Molecular Cell Biology, 2017). Its primary biological function is the synthesis of proteins from messenger RNA (mRNA) templates, a process essential for cellular growth, maintenance, and response to stimuli. This machinery is frequently hijacked by viruses, which lack their own translational apparatus and must rely on the host's system to produce viral proteins necessary for replication (Source: Science, 2021). In oncology, many cancer cells exhibit dysregulated translation, often upregulating initiation factors like eIF4E or eIF4A to selectively translate mRNAs that promote tumor progression and survival (Source: Cancer Discovery, 2019). Consequently, components of this machinery have emerged as viable therapeutic targets for both antiviral and anticancer drug development. Drugs such as Zotatifin and Plitidepsin target specific factors within this system, such as eIF4A and eEF1A, respectively, to disrupt the production of disease-associated proteins (Source: Journal of Clinical Investigation, 2020). However, because the translation machinery is fundamental to all cells, a major challenge in targeting it is achieving sufficient selectivity to avoid significant systemic toxicity (Source: Cell, 2020).

Other names

Protein synthesis machineryTranslational apparatusHost translation systemRibosomal machineryEukaryotic translation machinery

Inhibition of protein synthesis by targeting key components of the translation initiation complex (e.g., eIF4A, eIF4E) or elongation factors (e.g., eEF1A), thereby preventing the production of viral or oncogenic proteins (Source: Nature Reviews Drug Discovery, 2018).