Host ribosome and translational machinery

The host ribosome and associated translational machinery comprise the complex assembly of ribosomal RNAs (rRNAs), ribosomal proteins, and auxiliary translation factors responsible for protein synthesis in eukaryotic cells [1]. This machinery is a critical focal point for various diseases; for instance, viruses like SARS-CoV-2 and HIV-1 hijack the host's translational apparatus to prioritize the production of viral proteins over host proteins [2]. In oncology, dysregulation of translation initiation factors, such as eIF4E, often leads to the selective translation of oncogenic mRNAs, promoting tumor growth and metastasis [3]. Therapeutic strategies targeting this machinery include small molecule inhibitors of translation initiation, such as eIF4A inhibitors, and protein synthesis inhibitors like omacetaxine mepesuccinate, which is used in the treatment of chronic myeloid leukemia [4]. Because these components are essential for normal cellular homeostasis, drugs targeting the host ribosome must achieve high selectivity for diseased or infected cells to minimize systemic toxicity [5]. The development of such agents often focuses on specific subunits or factors that are differentially utilized in pathological states [3, 5].

Other names

Eukaryotic ribosome80S ribosomeTranslational apparatusProtein synthesis machineryHost translation system

Inhibition of the 80S ribosome complex by binding to the aminoacyl-tRNA site (A-site), blockade of translation initiation factors such as eIF4A and eIF4E, and indirect modulation of translation rates via the mTOR signaling pathway [3, 4, 5].