A critical finding from Science Translational Medicine reveals the quantifiable relationship between genomic instability and therapy resistance: POSTN+ myofibroblast formation through STING-WNT axis activation creates a measurable immunosuppressive microenvironment that significantly promotes PARP inhibitor resistance. The data demonstrates that baseline DNA damage directly correlates with STING pathway activation, which subsequently triggers WNT signaling and myofibroblast transformation at proportional levels. This dose-response relationship explains why tumors with high genomic instability paradoxically show enhanced treatment resistance. The transformed myofibroblasts establish an immunosuppressive niche that actively prevents anti-tumor immune responses while simultaneously conferring resistance to standard therapies. These quantitative insights provide mechanistic clarity on why certain ovarian cancers develop aggressive therapy-resistant phenotypes and suggest that measuring STING-WNT axis activation could help predict treatment outcomes and guide therapeutic strategy selection. Read the full article on GMJ Newsroom.
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