Signal transducer and activator of transcription 3 (STAT3) messenger RNA (STAT3 mRNA)

Signal transducer and activator of transcription 3 (STAT3) messenger RNA is the nucleic acid template required for the translation of the STAT3 protein, a key mediator of the JAK/STAT signaling pathway (NCBI Gene ID: 6774). This mRNA is a significant therapeutic target because the resulting STAT3 protein acts as a central hub for numerous oncogenic signaling pathways, promoting cell proliferation, survival, and immune suppression in the tumor microenvironment (PubMed: 25934008). While the STAT3 protein itself is often considered "undruggable" by traditional small molecules due to its structural properties, targeting its mRNA transcript using antisense oligonucleotides (ASOs) provides a precise method to silence its expression (Ionis Pharmaceuticals). For instance, Danvatirsen (AZD9150) is a next-generation ASO designed to bind to STAT3 mRNA, triggering its degradation via RNase H and effectively reducing the levels of the oncogenic protein (PubMed: 30530455). This approach is currently being investigated in clinical trials for the treatment of advanced solid tumors and lymphomas, where STAT3 overactivity is a known driver of disease progression and resistance to therapy (ClinicalTrials.gov). By reducing the pool of available mRNA, these therapies can inhibit the downstream transcription of genes involved in tumor growth and potentially enhance the efficacy of immunotherapy.

Other names

STAT3 transcriptSignal transducer and activator of transcription 3 mRNAAcute-phase response factor mRNAAPRF mRNA

Antisense oligonucleotides (ASOs) bind to the STAT3 mRNA sequence via complementary base pairing, which triggers RNase H-mediated cleavage of the mRNA, thereby preventing the translation of the STAT3 protein (PubMed: 25934008, Ionis Pharmaceuticals).