The first report of the NIMH collaborative study of the treatment of depression, STAR*D (Sequenced Treatment Alternatives to Relieve Depression) (Trivedi et al., p.
28), is accompanied by an editorial from Thomas Insel, Director of NIMH (p.
5). This real-world outcome study finds that only 30% of chronically depressed patients achieve remission during initial treatment with the selective serotonin reuptake inhibitor (SSRI) citalopram. The serotonin transporter, which mediates the clinical effects of SSRIs, is explored in two PET imaging studies that examine its brain expression in relationship to genetic background and disease state (Parsey et al., p.
48 and p.
52). An editorial by Sibille and Lewis (p.
8) reviews the biology of the transporter, which is also featured in Images in Neuroscience (p.
12).