RC3H1 (Ring Finger and CCCH-Type Domains 1): RC3H1, also known as Roquin, is a post-transcriptional regulator that controls the stability and translation of mRNA transcripts related to immune response and inflammation. It plays a key role in maintaining immune balance by regulating cytokine expression and other immune-related genes. Dysregulation of RC3H1 has been linked to autoimmune diseases, highlighting its potential as a target for immunotherapy.