Fig. 4: Cell survival data for chemotherapy and phototherapy.

Dose response curves for tumour cells and T cells for chemotherapy (a), photodynamic therapy (b) and photoimmunotherapy (b) from n = 3 biological replicates for each treatment and cell type combination. Fits represent least-squares best fit to Eq. 1. Yellow background indicates regions where survival fraction (SF) < 1, tumour cell or T cell death; blue background where SF > 1, immune stimulation. All error bars indicate s.e.m. Note that the measurements in (b) and (c) were published previously [39]. Here, the data were re-analysed and normalised to the response to 1 J/cm2 to identify dose regimes of immune stimulation and cytotoxicity.