Splicing factor modulator

A **splicing factor modulator** is a compound that influences the activity or function of proteins known as *splicing factors*, which are essential for removing introns from pre-messenger RNA during gene expression. These modulators act by altering the assembly or dynamics of the spliceosome—a large ribonucleoprotein complex responsible for catalyzing mRNA splicing—or by targeting regulatory enzymes such as serine/arginine-rich protein-specific kinases. Therapeutically, small molecule modulators have been developed to exploit vulnerabilities created by mutations in core spliceosomal proteins found in various cancers. Such agents can induce synthetic lethality in tumor cells harboring these mutations while sparing normal cells. Clinical development is ongoing for several classes including SF3b complex inhibitors like H3B‑8800, PRMT inhibitors, and SRPK kinase inhibitors. Patient selection based on specific genetic alterations within key splicing factors is an emerging strategy to maximize efficacy while minimizing off-target effects; however, safety concerns remain due to potential widespread disruption of normal cellular RNA processing.

Other names

Spliceosome modulatorPre-mRNA splicing modulatorSplicing machinery modulator

Alteration of spliceosome assembly or function to change pre-mRNA splicing patterns; Inhibition or modulation of specific kinases that regulate splicing factors (e.g., SRPK, CLK kinases)