Figure 8. A model for the role of STARS as a cytoskeletal intermediary between MEF2 and SRF.
MEF2 regulates STARS expression and STARS stimulates SRF activity by sequestering actin monomers, thereby freeing MRTFs to translocate to the nucleus and promote SRF-dependent gene expression. Sustained increase in STARS expression results in the alteration of the cardiac gene program, which may facilitate the transition to cardiac dysfunction.