PTGDS and mature T-cell and NK-cell non-Hodgkin lymphoma: Moreover, apoptosis inhibitor, Z-VAD, was found to partly rescue the anti-proliferation effects of AT56 treatment in PTCL cells, but the difference was not statistically significant (Supplementary Fig. S3B), suggesting that cell apoptosis might be the important but not the major mode of cell death after targeting PTGDS.