Abstract
Background
Vilazodone is a novel antidepressant agent that combines selective serotonin (5-HT)
reuptake inhibitor (SSRI) activity and 5-HT(1A) receptor partial agonist activity.
Objective
A pilot study was conducted to compare vilazodone (novel compound) and paroxetine
(gold standard) on antidepressant effects, tolerability, and inflammation and immune
modulation.
Methods
A 12-week, double-blind, randomized clinical trial was conducted with 56 nondemented
older adults diagnosed with major depressive disorder (MDD). Between-group differences
in mood, tolerability, and safety, as well as genomic markers of inflammation and
immune modulation, were examined.
Results
Both treatment groups demonstrated similar improvement in depressed mood. Leukocyte
gene expression profiles demonstrated reduction of specific proinflammatory gene transcripts
and bioinformatic indications of reduced nuclear factor kappa B (NF-κB), activator
protein (AP)-1, and cAMP response element binding (CREB) activity in the vilazodone
group compared to the paroxetine group. Transcript origin analyses implicated monocytes
and dendritic cells as the primary cellular origins of transcript reductions in the
vilazodone-treated group.
Conclusions
Vilazodone’s antidepressant effects may be associated with reduction of proinflammatory
gene expression and immune modulation. Further research is required.
Key words
geriatric depression - gene - antidepressant - immune - inflammation