NRG1 and depressive symptom measurement: In contrast, vNRG1-injected mice spent less time in social interaction and consumed less sucrose after subSD, compared with the vNRG1-injected naive mice and vGFP-injected subSD mice (Fig. 3w, x, Supplementary Fig. S4c), suggesting that NRG1 overexpression in LDTg promotes the development of depression-like behaviors.