Cited by 240Neurogenesis and neuroplasticity mechanismsNeuroinflammation and Neurodegeneration MechanismsNeonatal and fetal brain pathology

Stroke-induced neurogenesis in aged brain

Darsalia, Vladimer, Heldmann, Ursula, Lindvall, Olle, Kokaia, Zaal·2005·Stroke

Abstract

Background and Purpose— Stroke induced by middle cerebral artery occlusion (MCAO) triggers increased neurogenesis in the damaged striatum and nondamaged hippocampus of young adult rodents. We explored whether stroke influences neurogenesis similarly in the aged brain. Methods— Young adult (3 months) and old (15 months) rats were subjected to 1 hour of MCAO, and new cells were labeled by intraperitoneal injection of 5-bromo-2′-deoxyuridine 5′-monophosphate (BrdU), a marker for dividing cells, for 2 weeks thereafter. Animals were euthanized at 7 weeks after the insult, and neurogenesis was assessed immunocytochemically with antibodies against BrdU and neuronal markers with epifluorescence or confocal microscopy. Results— Young and old rats exhibited the same increased numbers of new striatal neurons after stroke, despite basal cell proliferation in the subventricular zone being reduced in the aged brain. In contrast, both the number of stroke-generated granule cells and basal neurogenesis in the dentate subgranular zone were lower in old compared with young animals. Also, the ability of newly formed cells to differentiate into neurons was impaired in the aged dentate gyrus. Conclusions— Basal neurogenesis is impaired in the subgranular and subventricular zones of aged animals, but both regions react to stroke with increased formation of new neurons. The magnitude of striatal neurogenesis after stroke is similar in young and old animals, indicating that this potential mechanism for self-repair also operates in the aged brain.

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Crossref · 10.1161/01.str.0000173151.36031.be

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Authors
Darsalia, V., Heldmann, U., Lindvall, O., & Kokaia, Z.
Affiliations
Skåne University Hospital (SE)
Venue
Stroke
Published
2005-08
Volume
36
Issue
8
Pages
1790-1795
ISSN
  • 0039-2499 (ISSN-L)
  • 1524-4628
OpenAlex
W2167181354
Cited by
240
References
35
Citations by year
2026: 3 · 2025: 3 · 2024: 5 · 2023: 3 · 2022: 2 · 2021: 5 · 2020: 10 · 2019: 10 · 2018: 11 · 2017: 13 · 2016: 18 · 2015: 15 · 2014: 13 · 2013: 13 · 2012: 19
FWCI
3.94
Type
journal article
Language
en
Open access
closed
Locations
  • Stroke (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
Vetenskapsrådet
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal and fetal brain pathology
Keywords
brain aging, middle cerebral artery occlusion, striatum, dentate gyrus, subventricular zone, subgranular zone, basal cell proliferation, neuronal differentiation, hippocampus, BrdU labeling
MeSH terms
Aging, Animals, Brain, Bromodeoxyuridine, Cell Count, Cell Differentiation, Cerebral Arteries, Female, Hippocampus, Immunohistochemistry, Injections, Intraperitoneal, Ischemia, Microscopy, Fluorescence, Neurons, Stem Cells, Time Factors, Rats, Wistar, Microscopy, Confocal, Dentate Gyrus, Ki-67 Antigen, Infarction, Middle Cerebral Artery, Stroke, Cell Proliferation, Rats

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