RPS14 is a structural component of the small ribosomal subunit (40S) essential for protein synthesis and ribosome biogenesis. As part of the small-subunit processome, RPS14 participates in pre-rRNA processing, modification, and assembly during nucleolus-based ribosome biogenesis 1. RPS14 expression is tightly regulated through an intronic antisense RNA-mediated mechanism, where antisense transcripts promote RPS14 mRNA synthesis while the RPS14 protein itself provides negative feedback inhibition 2. RPS14 has critical roles in erythroid differentiation, where its haploinsufficiency impairs mitochondrial ribosomal protein translation and reduces eIF5A hypusination, disrupting mitochondrial metabolism essential for erythropoiesis 3. RPS14 haploinsufficiency—a gene dosage effect from chromosome 5 deletion—is the primary cause of the 5q- myelodysplastic syndrome (MDS), triggering p53-dependent ribosomal stress, cell cycle arrest, and apoptosis in erythroid progenitors 4, 5, 6. Beyond MDS, RPS14 overexpression promotes glioma progression via p53 pathway activation 7, and elevated RPS14 correlates with colorectal cancer development when induced by Fusobacterium nucleatum infection through the LY6A receptor 8. RPS14 upregulation also occurs in Alzheimer's disease brain capillaries, suggesting roles in cerebrovascular pathology 9. These findings position RPS14 as both a dosage-sensitive regulator of hematopoietic cell differentiation and a potential oncogenic driver in multiple cancer contexts.