Identification of novel electroconvulsive shock-induced and activity-dependent genes in the rat brain.
Electroconvulsive shock (ECS) has been used as an effective treatment for patients suffering from major depression disorders and schizophrenia. However, the exact mechanisms underlying the action of ECS are poorly understood. Using high-density oligonucleotide microarrays, we identified 60 ECS-induced genes whose gene products are involved in the neuronal signaling, neuritogenesis and tissue remodeling. In situ hybridization and depolarization-dependent expression assay were performed to characterize 4 genes (lysyl oxidase, Ab1-046, SOX11, and T-type calcium channel 1G subunit) which have not yet been reported to be induced by ECS. Interestingly, the induction of these genes was observed mainly in the dentate gyrus of hippocampal formation and piriform cortex, where ECS-induced neural activation is highlighted, and depolarization of cultured cortical neurons also induced the expression of these genes. Taken together, our results suggest that therapeutic actions of ECS may be manifested by the activity-dependent induction of genes related to the plastic changes of the brain such as neuronal signaling neuritogenesis, and tissue remodeling.
Sun
Woong
W
Department of Anatomy, Korea 21 Biomedical Science, Korea University College of Medicine, 126-1, 5-Ka, Anam-Dong, Seongbuk-Gu, Seoul 136-705, Republic of Korea.
Park
Kun Woo
KW
Choe
Jeehyung
J
Rhyu
Im Joo
IJ
Kim
Il Hwan
IH
Park
Soon Kwon
SK
Choi
Byungil
B
Choi
Sang-Hyun
SH
Park
Sun Hwa
SH
Kim
Hyun
H
D000818:Animals; D001921:Brain / Q000378:metabolism / Q000528:radiation effects*; D001923:Brain Chemistry / Q000502:physiology*; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics / Q000378:metabolism; D015220:Calcium Channels / Q000235:genetics / Q000378:metabolism; D004195:Disease Models, Animal; D004597:Electroshock; D005786:Gene Expression Regulation / Q000528:radiation effects*; D005796:Genes / Q000502:physiology / Q000528:radiation effects*; D009416:Nerve Regeneration / Q000235:genetics / Q000502:physiology; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors
D019208:Brain-Derived Neurotrophic Factor; D015220:Calcium Channels