RPL8 is a component of the large ribosomal subunit that plays critical roles in protein synthesis and cellular metabolism beyond its structural function in ribosomes 1. The protein contributes to ribosome heterogeneity, where RPL8-containing ribosomes specifically promote lipid synthesis and accumulation in hepatocytes 1. In metabolic dysfunction-associated steatotic liver disease (MASLD), elevated RPL8 levels increase lipid synthesis and endoplasmic reticulum stress, while its depletion suppresses disease progression 1. RPL8 is upregulated in multiple cancer types, including hepatocellular carcinoma where it promotes cell proliferation, migration, invasion, and glycolysis through activation of the mTORC1 signaling pathway 2. In colorectal cancer, RPL8 expression correlates with poor prognosis and is associated with tumor stemness and immune evasion 3. The protein is also upregulated at the blood-brain barrier in Alzheimer's disease patients, suggesting involvement in neurodegeneration 4. Disease-causing variants in RPL8 have been identified in Diamond-Blackfan anemia patients, where functionally impaired RPL8 affects ribosome production and erythropoiesis 5. These findings indicate RPL8 functions beyond basic ribosome assembly to regulate specific metabolic and oncogenic pathways.