Cathepsin S messenger RNA (CTSS mRNA) (CTSS mRNA)

Cathepsin S (CTSS) mRNA is the messenger RNA transcript that encodes the Cathepsin S enzyme, a lysosomal cysteine protease essential for the immune system's function [UniProt P25774]. Its primary biological role is the degradation of the invariant chain (Ii/CD74) within the endolysosomal compartment, which is a critical step for the loading of antigenic peptides onto MHC class II molecules for presentation to CD4+ T cells [NCBI Gene ID 1520]. Dysregulation of CTSS mRNA expression is associated with several pathological states, including autoimmune diseases like Sjögren's syndrome and rheumatoid arthritis, where overproduction of the enzyme leads to aberrant immune activation [PubMed: 25650001]. Additionally, CTSS is implicated in cancer progression, where it facilitates angiogenesis and tumor invasion by remodeling the extracellular matrix [PubMed: 30241014]. Therapeutic strategies targeting CTSS mRNA, such as siRNA or antisense oligonucleotides, aim to silence the expression of the protease at the genetic level, potentially offering higher specificity and reduced toxicity compared to traditional small molecule inhibitors. These RNA-based approaches are currently being explored in preclinical models to modulate immune responses and inhibit tumor growth.

Other names

Cathepsin S mRNACTSS transcriptCTSS messenger RNA

RNA interference (RNAi) and RNase H-mediated degradation of the target transcript to prevent translation of the Cathepsin S protein.