Abstract:
:Repetitive transcranial magnetic stimulation (rTMS) is a novel physiological therapy that has been adopted to clinically treat psychiatric disorders. Our previous study indicated the potential therapeutic effect of rTMS on posttraumatic stress disorder (PTSD). However, the exact molecular mechanism is elusive. Currently, using the single prolonged stress (SPS) rat model for PTSD, we investigated the glutamatergic transmission and neural plasticity changes in the anterior cingulate cortex (ACC) after SPS induction and explored the protective effects and mechanism of rTMS treatment. We found that high-frequency rTMS (HrTMS, 15 Hz) treatment significantly relieved the impaired glutamatergic receptors in the ACC after SPS treatment by significantly increasing NMDAR and AMPAR expression. Simultaneously, HrTMS blocked inhibited neuronal phosphatase and tensin homologue on chromosome 10 (PTEN)/Akt signalling in the ACC after SPS treatment by decreasing PTEN expression and increasing Akt phosphorylation, which is critically involved in the regulation of memory and synaptic plasticity. The PTEN inhibitors bpV and small interfering RNA and the Akt inhibitor wortmannin were stereotaxically administered to the ACC after SPS treatment to advance the mechanistic study. Analysis by Western blot, double immunofluorescence, Golgi staining and behavioural tests demonstrated that the effects of rTMS on PTEN/Akt activation, glutamatergic receptor expression, neuronal synaptic plasticity and PTSD-related behaviours induced by SPS treatment were enhanced by PTEN inhibition and blocked by Akt inhibition in the ACC. Our study provides convincing evidence for the effectiveness of rTMS treatment on PTSD and suggests that its potential mechanism involves remodelling neuronal synaptic plasticity via the PTEN/Akt signalling pathway.
journal_name
Mol Neurobioljournal_title
Molecular neurobiologyauthors
Liu G,Feng D,Wang J,Zhang H,Peng Z,Cai M,Yang J,Zhang R,Wang H,Wu S,Tan Qdoi
10.1007/s12035-017-0602-7subject
Has Abstractpub_date
2018-05-01 00:00:00pages
3946-3958issue
5eissn
0893-7648issn
1559-1182pii
10.1007/s12035-017-0602-7journal_volume
55pub_type
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