Host translational machinery

The host translational machinery is the integrated system of ribosomes, transfer RNAs (tRNAs), and translation factors (initiation, elongation, and termination) that decodes messenger RNA (mRNA) into functional proteins (Pelletier et al., 2015, Nature Reviews Drug Discovery). This machinery is a critical therapeutic target because viruses are entirely dependent on the host's protein synthesis apparatus to replicate, often employing specialized mechanisms to prioritize viral mRNA translation over host mRNA (Stern-Ginossar et al., 2019, Annual Review of Virology). In oncology, the machinery is frequently dysregulated, with overactive initiation factors like eIF4E and eIF4A driving the translation of oncogenic proteins that promote cell survival and proliferation (Bhat et al., 2015, Nature Reviews Cancer). Pharmacological intervention typically involves small-molecule inhibitors that target specific components, such as the RNA helicase eIF4A or the elongation factor eEF1A, to disrupt the production of pathological proteins (White et al., 2021, Science). While targeting such a fundamental cellular process offers broad-spectrum potential against various viruses and cancers, it also presents significant challenges regarding the therapeutic window and potential systemic toxicity (Pelletier et al., 2015, Nature Reviews Drug Discovery).

Other names

Eukaryotic translation machineryProtein synthesis machineryTranslational apparatusHost cell translation system

Inhibition of translation initiation factors (e.g., eIF4A), elongation factors (e.g., eEF1A), or regulatory kinases (e.g., mTOR) to suppress the synthesis of viral or pro-tumorigenic proteins.