Regulation of Drosophila hematopoietic sites by Activin-β from active sensory neurons

Hematopoietic sites in theDrosophilalarva require the local peripheral nervous system for blood cells (hemocytes) to survive and proliferate, but how this is mediated is unclear. Here, the authors identify Activin-β from sensory neurons as signalling to hemocytes, affecting proliferation and adhesion.