The Key Role of the RPS14 Gene in Neoplasms and Solid Tumors.

Objectives: The ribosomal protein S14 (RPS14) gene located at 5q33 codes for a protein involved in ribosomal biogenesis. The RPS14 gene has a length of 5.9 kb of DNA comprising 5 exons and 4 introns. It is possible that RPS14 is involved in the formation of pre-RNA 18s, an intermediate RNA that serves for the formation of the 40S small subunit of the ribosome. RPS14 haploinsufficiency (HI) produces alterations in intermediate RNA levels (pre-RNA 30S/18SE/18S), which are found in del(5q) MDS. In addition, RPS14 haploinsufficiency results in the formation of the MDM2 (double minute mouse E3 ubiquitin ligase)-RP (ribosomal protein) complex that prevents the MDM2-p53 interaction, generating an accumulation of p53 levels. This accumulation produces cell cycle arrest, impaired DNA repair, senescence, and apoptosis. RPS14 haploinsufficiency has been seen in MDS. Altered expression levels of RPS14 have also been reported in glioma, colorectal cancer, hepatocellular carcinoma, breast cancer, renal cell carcinoma, and primary myelofibrosis.