Electroconvulsive seizures increase hippocampal neurogenesis after chronic corticosterone treatment

Hellsten, JohanLund University,Lunds universitet,Enheten för psykiatrisk neuromodulering (PNU),Forskargrupper vid Lunds universitet,Psychiatric Neuromodulation Unit (PNU),Lund University Research Groups (författare)

Major depression is often associated with elevated glucocorticoid levels. High levels of glucocorticoids reduce neurogenesis in the adult rat hippocampus. Electroconvulsive seizures (ECS) can enhance neurogenesis, and we investigated the effects of ECS in rats where glucocorticoid levels were elevated in order to mimic conditions seen in depression. Rats given injections of corticosterone or vehicle for 21 days were at the end of this period treated with either a single or five daily ECSs. Proliferating cells were labelled with bromodeoxyuridine (BrdU). After 3 weeks, BrdU-positive cells in the dentate gyrus were quantified and analyzed for co-labelling with the neuronal marker neuron-specific nuclear protein (NeuN). In corticosterone-treated rats, neurogenesis was decreased by 75%. This was counteracted by a single ECS. Multiple ECS further increased neurogenesis and no significant differences in BrdU/NeuN positive cells were detected between corticosterone- and vehicle-treated rats given five ECS. Approximately 80% of the cells within the granule cell layer and 10% of the hilar cells were double-labelled with BrdU and NeuN. We therefore conclude that electroconvulsive seizures can increase hippocampal neurogenesis even in the presence of elevated levels of glucocorticoids. This further supports the hypothesis that induction of neurogenesis is an important event in the action of antidepressant treatment.

MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Neurovetenskaper hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Neurosciences hsv//eng
Animals
Cell Count
Cell Death/drug effects
Cell Division/drug effects
Corticosterone/metabolism
Depressive Disorder/physiopathology
Drug Administration Schedule
Electroconvulsive Therapy
Hippocampus/drug effects
Immunohistochemistry
Male
Nerve Degeneration/chemically induced
Neurons/drug effects
Nuclear Proteins/metabolism
Rats
Rats, Wistar
Stem Cells/drug effects
Up-Regulation/drug effects

Wennström, MalinLund University,Lunds universitet,Enheten för psykiatrisk neuromodulering (PNU),Forskargrupper vid Lunds universitet,Psychiatric Neuromodulation Unit (PNU),Lund University Research Groups(Swepub:lu)mpu-mwe (författare)
Mohapel, PaulLund University,Lunds universitet,Wallenberg Neurocentrum, Lund,Medicinska fakulteten,Wallenberg Neuroscience Centre, Lund,Faculty of Medicine(Swepub:lu)neur-pmo (författare)
Ekdahl, Christine T.Lund University,Lunds universitet,Wallenberg Neurocentrum, Lund,Medicinska fakulteten,Wallenberg Neuroscience Centre, Lund,Faculty of Medicine(Swepub:lu)neur-cek (författare)
Bengzon, JohanLund University,Lunds universitet,Neurokirurgi,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Neurosurgery,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)neur-jbe (författare)
Tingström, AndersLund University,Lunds universitet,Enheten för psykiatrisk neuromodulering (PNU),Forskargrupper vid Lunds universitet,Psychiatric Neuromodulation Unit (PNU),Lund University Research Groups(Swepub:lu)mpu-ati (författare)
Enheten för psykiatrisk neuromodulering (PNU)Forskargrupper vid Lunds universitet (creator_code:org_t)

Ingår i:European Journal of Neuroscience: Wiley16:2, s. 283-2901460-95680953-816X

Av författaren/redakt...: Hellsten, Johan; Wennström, Malin; Mohapel, Paul; Ekdahl, Christin ...; Bengzon, Johan; Tingström, Ander ...

Om ämnet

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Medicinska och f ...; och Neurovetenskaper

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