Angiogenesis, the growth of new blood vessels from pre-existing ones, is required for wound healing, menstruation, embryogenesis and various pathological conditions including tumour growth.  Macrophages, key cells of the innate immune system, are known to support angiogenesis but are not believed to directly form vessel walls.  Now, a study from researchers at The Scripps Research Institute shows that macrophages can drill through tumours to create … Continue reading Immune cells shown to facilitate tumour growth by forming primitive vascular channels.