P2RY2 and infection: To evaluate the role of different members of the P2Y receptor family in the host response during infection by T. gondii, peritoneal macrophages infected with tachyzoites at a 5:1 ratio of tachyzoites to host cells were treated for 30 minutes with 100 μM of ATP (P2Y2 activator), UTP (P2Y2 and P2Y4 activator) or UDP (P2Y6 activator).