gms | German Medical Science

59. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC)
3. Joint Meeting mit der Italienischen Gesellschaft für Neurochirurgie (SINch)

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

01. - 04.06.2008, Würzburg

Intraventricular infusion of PEDF causes proliferation of neural stem cells in the subventricular zone following experimental brain injury

Intraventrikuläre PEDF-Infusion verursacht Proliferation von neuralen Stammzellen in der Subventrikularzone nach experimentellem Hirntrauma

Meeting Abstract

  • corresponding author E.M. Bründl - Neurochirurgische Universitätsklinik, Klinikum der Universität Regensburg, Regensburg
  • A.-L. Pina - Neurochirurgische Universitätsklinik, Klinikum der Universität Regensburg, Regensburg
  • E.-M. Störr - Neurochirurgische Universitätsklinik, Klinikum der Universität Regensburg, Regensburg
  • M. A. Proescholdt - Neurochirurgische Universitätsklinik, Klinikum der Universität Regensburg, Regensburg
  • A. Brawanski - Neurochirurgische Universitätsklinik, Klinikum der Universität Regensburg, Regensburg

Deutsche Gesellschaft für Neurochirurgie. Società Italiana di Neurochirurgia. 59. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 3. Joint Meeting mit der Italienischen Gesellschaft für Neurochirurgie (SINch). Würzburg, 01.-04.06.2008. Düsseldorf: German Medical Science GMS Publishing House; 2008. DocP 112

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2008/08dgnc380.shtml

Veröffentlicht: 30. Mai 2008

© 2008 Bründl et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Objective: Head injury is a major cause of morbidity and mortality worldwide. Unfavourable outcome i.e. death or vegetative state amounts to 34.5% of all patients with severe head injury. The brain has the capacity for self repair through proliferation of endogenous progenitor cells, provided the molecular micomileu is adequate. Pigment Epithelium-Derived Factor (PEDF) is a potent antiangiogenic and tumor-differentiating factor that can also protect and differentiate neurons. In this study we wanted to investigate the effects of PEDF on neural stem cells (NSCs) of the subventricular zone (SVZ) and the dentate gyrus (DG) in animals subjected to an experimental brain injury.

Methods: 30 rats received a controlled cortical impact injury, 5 animals were sacrificed and analyzed without trauma or treatment as sham control. The treatment control group (n=9) received the impact injury but no treatment. The remaining animals were infused intraventricularly either with PEDF 5 µg/ml (n=7) or PEDF 10 µg/ml (n=8) over a time period of 7 days using a miniosmotic pump. Control animals (n=6) received carrier infusion only. To analyze DNA synthesis, animals were injected with BrdU (50 mg/Kg bogyweight). After 8 days, the animals were sacrificed, and the brains were harvested for histologic analysis. The extent of lesion was investigated by cresyl violet staining, the analysis of stem cell proliferation was performed using immunohistochemical staining for double cortin (Dcx) and GFAP; inflammatory reactions and cell division were investigated by staining for ED-1and anti-BrdU respectively.

Results: The extent of lesion was almost identical in all treatment groups. The inflammatory reponse was not significantly different in the treatment groups. BrdU labeling was significantly enhanced in the SVZ upon treatment with PEDF in a dose dependent fashion (p=0.002). GFAP/BrdU double labeling revealed a marked increase of GFAP positive, actively deviding cells.

Conclusions: Our data suggest that PEDF infusion causes proliferation of NSCs in the SVZ. This may ultimately contribute to enhanced neurogenesis after brain injury.