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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Acta+Psychiatr+Scand 2015 ; 132 (5): 379-88 Nephropedia Template TP
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Light therapy and serotonin transporter binding in the anterior cingulate and prefrontal cortex #MMPMID25891484
Harrison SJ; Tyrer AE; Levitan RD; Xu X; Houle S; Wilson AA; Nobrega JN; Rusjan PM; Meyer JH
Acta Psychiatr Scand 2015[Nov]; 132 (5): 379-88 PMID25891484show ga
OBJECTIVE: To investigate the effects of light therapy on serotonin transporter binding (5-HTT BPND ), an index of 5-HTT levels, in the anterior cingulate and prefrontal cortices (ACC and PFC) of healthy individuals during the fall and winter. Twenty-five per cent of healthy individuals experience seasonal mood changes that affect functioning. 5-HTT BPND has been found to be higher across multiple brain regions in the fall and winter relative to spring and summer, and elevated 5-HTT BPND may lead to extracellular serotonin loss and low mood. We hypothesized that, during the fall and winter, light therapy would reduce 5-HTT BPND in the ACC and PFC, which sample brain regions involved in mood regulation. METHOD: In a single-blind, placebo-controlled, counterbalanced, crossover design, [(11) C]DASB positron emission tomography was used measure 5-HTT BPND following light therapy and placebo conditions during fall and winter. RESULTS: In winter, light therapy significantly decreased 5-HTT BPND by 12% in the ACC relative to placebo (F1,9 = 18.04, P = 0.002). In the fall, no significant change in 5-HTT BPND was found in any region across conditions. CONCLUSION: These results identify, for the first time, a central biomarker associated with the intervention of light therapy in humans which may be applied to further develop this treatment for prevention of seasonal depression.
|*Seasons[MESH]
|Adult[MESH]
|Biomarkers/metabolism[MESH]
|Cross-Over Studies[MESH]
|Female[MESH]
|Gyrus Cinguli/*metabolism[MESH]
|Humans[MESH]
|Male[MESH]
|Phototherapy/instrumentation/*methods[MESH]
|Positron-Emission Tomography/*methods[MESH]
|Prefrontal Cortex/*metabolism[MESH]
|Protein Binding[MESH]
|Serotonin Plasma Membrane Transport Proteins/*metabolism[MESH]