NOS1 and depressive symptom measurement: The NO system has been implicated in the treatment,22, 46, 47, 48, 49, 50, 51, 52, 53, 54 as well as the pathobiology of depression.49, 50, 55, 56, 57 We, therefore, further investigated PSD-95, nNOS, CAPON and sGC-β1.