title: Profile of gene expression in the subventricular zone after traumatic brain injury.
abstract: Neural stem cells, which reside in the subventricular zone (SVZ) and dentate gyrus (DG) of adult mammals, give rise to new neurons throughout life. However, these neural stem cells do not appear to contribute to regeneration in the damaged central nervous system. Following traumatic brain injury (TBI) in adult rats, the number of proliferating cells labeled with bromodeoxyuridine (BrdU) is significantly increased in the bilateral SVZ and DG; however, these proliferating cells do not contribute to effective regeneration in the damaged area. To gain insight into the molecular mechanisms of these biological actions, changes in gene expression in the SVZ after brain trauma were examined by cDNA microarray. Of 9,596 genes screened, 97 were upregulated and 204 were downregulated. Classifying these genes according to their function suggests that TBI affects a broad range of cellular functions. The validity of the data was confirmed by RT-PCR. The expression of some genes localized in the SVZ was confirmed by in situ hybridization. This combined strategy is effective for comprehensive analysis of the pathophysiological changes in the SVZ after brain injury and should contribute to the understanding of the molecular events that occur after injury. In the future, this may enable regeneration of the damaged central nervous system.
authors.affiliation: Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan. yoshiya@hp-emerg.med.osaku-u.ac.jp
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Yoshiya
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tanaka
authors.forename: Kousuke
authors.initials: K
authors.lastname: Kasai
authors.forename: Taro
authors.initials: T
authors.lastname: Irisawa
authors.forename: Tadahiko
authors.initials: T
authors.lastname: Shiozaki
authors.forename: Hisashi
authors.initials: H
authors.lastname: Sugimoto
mesh_terms: D000818:Animals; D001930:Brain Injuries / Q000235:genetics* / Q000473:pathology; D017931:DNA Primers; D015870:Gene Expression; D020869:Gene Expression Profiling; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D008297:Male; D009474:Neurons / Q000502:physiology*; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D017208:Rats, Wistar; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000502:physiology*
chemical_list: D017931:DNA Primers