RPS11 (ribosomal protein S11) is a structural component of the cytosolic small ribosomal subunit (40S) that plays essential roles in protein synthesis and ribosome biogenesis 1. The gene is located on chromosome 19.2 in a cluster with other genes and contains intronic small nucleolar RNA (snoRNA) sequences 12. Beyond its canonical ribosomal function, RPS11 serves as a critical biomarker in multiple disease contexts. In glioblastoma, RPS11 overexpression consistently predicts poor patient survival (HR = 11.5, p<0.001) and is associated with treatment-resistant glioblastoma stem cells 3. The protein influences cancer cell susceptibility to topoisomerase II poisons like etoposide, with RPS11 loss conferring drug resistance and impairing pro-apoptotic gene induction 4. RPS11 also demonstrates diagnostic potential in acute myocardial infarction with an AUC of 0.794 and shows correlations with immune cell populations 5. Importantly, RPS11 can function as a trained immunity agonist, acting through TLR4-TET2 signaling to enhance antigen presentation and boost vaccine efficacy when delivered via nanoparticles 6. These findings establish RPS11 as both a fundamental ribosomal component and a multifunctional protein with significant clinical implications across cancer, cardiovascular disease, and immunotherapy applications.