How does lurbinectedin boost immune response?

How does lurbinectedin improve T-cell activity?

Lurbinectedin binds directly to DNA minor grooves in tumor cells and prevents transcription elongation, killing both dividing and non-dividing cells. This DNA damage also triggers the release of DNA fragments that activate innate immune sensors such as cGAS-STING, which in turn spawns interferons and attracts T-cells into the tumor.

Why do patients see fewer myeloid-derived suppressor cells after treatment?

Lurbinectedin reduces the number of myeloid-derived suppressor cells that normally block T-cell function. Fewer MDSCs mean less immunosuppression, so T-cells remain active against the tumor.

What happens when lurbinectedin is combined with atezolizumab?

Combining lurbinectedin with atezolizumab turns off the additional inhibitory signal sent by PD-L1. The doppler radar-like combination of DNA-damage-induced interferon production and PD-L1 blockade keeps T-cells freed from two separate inhibition routes.

How long does the immune-boosting effect persist?

The DNA-binding effect itself lasts hours, but the induced interferons and recruited T-cells keep working for days to weeks after a single dose.