TNF and soft tissue sarcoma: As TP53 status might modulate TNF-α-induced cell death efficiency, we analysed TNF-α-induced apoptosis on our panel of nine soft tissue sarcoma cell lines by 3.3-dihexyloxacarbocyanine iodide (DiOC6) and propidium iodide (PI) labeling after 72 h of TNF-α treatment.