T-cell surface glycoprotein CD3 zeta chain mRNA (CD3ζ mRNA)

CD3ζ mRNA, encoded by the CD247 gene, is the messenger RNA transcript for the zeta chain of the T-cell receptor (TCR) complex (UniProt, GeneCards). This subunit is a critical component of the TCR-CD3 complex, responsible for coupling antigen recognition to intracellular signaling pathways via its multiple immunoreceptor tyrosine-based activation motifs (ITAMs) (NIH, UniProt). In various pathological conditions, such as cancer and autoimmune diseases like systemic lupus erythematosus (SLE), CD3ζ mRNA expression is frequently downregulated, leading to T-cell dysfunction and impaired immune responses (PubMed, NIH). Consequently, CD3ζ mRNA levels serve as a significant biomarker for monitoring T-cell exhaustion and predicting patient prognosis in oncology and chronic infections (PubMed, NIH). In the field of cell therapy, CD3ζ mRNA is a direct target for therapeutic intervention; for instance, allogeneic CAR-T products like CYAD-211 utilize shRNA to knock down CD3ζ mRNA, thereby eliminating endogenous TCR expression to prevent graft-versus-host disease (Frontiers in Immunology, MDPI). Furthermore, the CD247 locus is a primary site for gene editing technologies like CRISPR-Cas9 to enable the physiological regulation of chimeric antigen receptors (ASH Publications). mRNA-based therapies and vaccines are also being developed to restore CD3ζ expression or use it as a tumor antigen in immunocompromised states (NIH). The stability and translation of CD3ζ mRNA are further modulated by metabolic factors such as L-arginine and signaling pathways like mTOR (PubMed).

Other names

CD247 mRNACD3Z mRNAT3Z mRNAT-cell receptor zeta mRNACD3-zeta mRNATCR zeta mRNA

RNA interference (shRNA-mediated knockdown), Gene editing (CRISPR-Cas9), mRNA translation (mRNA-based therapy), Transcriptional and translational modulation