For syngeneic studies, 7–8 week-old female or male, wildtype or Bcl-xPlt20/Plt20 mice41 on C57BL/6 background were used78. 1 × 106 B16F10 cells in 50% growth factor-reduced Matrigel were injected subcutaneously into the flank. Caliper measurements of the tumours were taken every 2–3 days and after the animals were euthanized, their primary tumour, lungs and liver were harvested for histology. Blood was collected pre- and post- experiment from the retro-orbital sinus into Microtainer tubes containing EDTA, and circulating platelet and white blood cells (WBC) counts were performed using an ADVIA 2120 haematological analyser (Seimens, Munich Germany). Mice were rested for 2 weeks following bleeding prior to tumour cell injection.
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