Psychopharmacology

, Volume 231, Issue 9, pp 1949–1962

No evidence for enhanced extinction memory consolidation through noradrenergic reuptake inhibition—delayed memory test and reinstatement in human fMRI

Authors

    • Institute for Systems NeuroscienceUniversity Medical Center Hamburg–Eppendorf (UKE)
  • Jan Haaker
    • Institute for Systems NeuroscienceUniversity Medical Center Hamburg–Eppendorf (UKE)
  • Tahmine Fadai
    • Institute for Systems NeuroscienceUniversity Medical Center Hamburg–Eppendorf (UKE)
  • Raffael Kalisch
    • Institute for Systems NeuroscienceUniversity Medical Center Hamburg–Eppendorf (UKE)
    • Neuroimaging Center Mainz (NIC), Focus Program Translational NeuroscienceJohannes Gutenberg University Medical Center
Original Investigation

DOI: 10.1007/s00213-013-3338-8

Cite this article as:
Lonsdorf, T.B., Haaker, J., Fadai, T. et al. Psychopharmacology (2014) 231: 1949. doi:10.1007/s00213-013-3338-8

Abstract

Rationale

One promising approach in the current ambition to maximise treatment benefit for anxiety disorders is the pharmacological enhancement of cognitive–behavioural treatment efficacy, which can be experimentally modelled by pharmacological enhancement of extinction learning/consolidation. Noradrenaline (NA) is involved in memory consolidation, and NAergic innervations are found in brain areas implicated in fear conditioning and extinction.

Objectives

Thus, to enhance extinction memory consolidation through boosted NAergic signalling, we administered 4 mg reboxetine (RBX) immediately after extinction learning (day 2, 24 h after conditioning on day 1) in a randomised, placebo (PLC)-controlled design. At a delayed memory test (day 8), we probed cued and contextual fear and extinction memories before and after a reinstatement manipulation.

Results

After reinstatement, we find significantly enhanced amygdala and posterior hippocampus activation in the RBX group, areas implicated in fear memory expression, while the PLC group exhibited enhanced activation in areas associated with extinction memory expression (vmPFC, anterior hippocampus). No group differences were found in skin conductance responses.

Conclusions

Thus, our data do not support our hypothesis that enhancement of NA signalling may facilitate extinction memory consolidation and provide preliminary evidence that this might rather enhance fear memories on a neural but not physiological (skin conductance responses) level.

Keywords

Cue conditioningContext conditioningAmygdalaReinstatementvmPFC

Supplementary material

213_2013_3338_MOESM1_ESM.doc (95 kb)
ESM 1(DOC 95 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2013