Microglial Hmox1 is thought to reduce inflammation after lipopolysaccharide (LPS) exposure and to improve neurorecovery after intraventricular hemorrhage, but the role of microglial Hmox1 in normal brain development is unknown (Parada et al., 2015; LeBlanc et al., 2016). The gene discussed is HMOX1; the disease is Intraventricular hemorrhage.