Cited by 45Memory and Neural MechanismsNerve injury and regenerationNeurogenesis and neuroplasticity mechanisms

Perforant path damage results in progressive neuronal death and somal atrophy in layer II of entorhinal cortex and functional impairment with increasing postdamage age

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Peterson, DA, Lucidi-Phillipi, CA, Eagle, KL, Gage, FH·1994·The Journal of Neuroscience

Abstract

In vivo model systems that can evaluate neuronal death, survival, and regeneration are critical to revealing basic mechanisms of neuronal response and developing strategies for CNS repair. We propose a distinct experimental model of CNS degeneration following lesions to the perforant path connecting the hippocampus and the entorhinal cortex. Within 2 weeks of a unilateral aspirative perforant path lesion, 30% of the ipsilateral entorhinal cortex layer II (ECL II) projection neurons had died with no change in the contralateral ECL II population. Although there was no loss of ECL II neurons with normal aging, animals that survived for 15 months postlesion experienced an almost 50% loss of ipsilateral neurons compared to unlesioned controls. This progressive neuronal death was bilateral, with the contralateral ECL II experiencing a 30% decline in neuronal number relative to unlesioned controls. The use of unbiased stereology ensured that estimates of total number were not distorted by changes in the reference volume. The documented progressive neuronal death resulted in delayed behavioral impairment in spatial learning and performance (latency nearly 200% of controls). We propose, therefore, that the perforant path model is suitable for experimental investigation of neuronal survival and regeneration following CNS trauma.

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Crossref · 10.1523/jneurosci.14-11-06872.1994

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  1. Cotman CW, Nadler JV (198 1) Glutamate and aspartate as hippo- campal transmitters: biochemical and pharmacological evidence. In: Glutamate: transmitter in the central nervous system (Roberts P, Storm-Mathisen J, Johnston G, eds), pp 117-l 54. New York: Wiley.

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Authors
Peterson, D., Lucidi-Phillipi, C., Eagle, K., & Gage, F.
Affiliations
University of California San Diego (US)
Venue
The Journal of Neuroscience
Published
1994-11-01
Volume
14
Issue
11
Pages
6872-6885
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1525773819
Cited by
45
References
58
Citations by year
2026: 1 · 2020: 1 · 2019: 1 · 2014: 1
FWCI
2.58
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (P01AG010435, R01-AG-06088, R01AG006088, P01 AG 10435)
  • National Institute of Neurological Disorders and Stroke (P01NS028121, P01 NS-28121)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
neuronal cell death, hippocampus, spatial learning impairment, aging, neuronal survival, neuronal regeneration, stereology
MeSH terms
Aging, Animals, Disease Models, Animal, Female, Hippocampus, Nerve Degeneration, Nerve Regeneration, Neural Pathways, Neurons, Rats, Inbred F344, Reproducibility of Results, Cell Death, Entorhinal Cortex, Maze Learning, Rats

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