Cited by 61Tryptophan and brain disordersStress Responses and CortisolNeuroinflammation and Neurodegeneration Mechanisms

Neonatal lipopolysaccharide induces pathological changes in parvalbumin immunoreactivity in the hippocampus of the rat

Jenkins, Trisha A., Harte, Michael K., Stenson, Gillian, Reynolds, Gavin P.·2009·Behavioural Brain Research

Abstract

Early exposure to infection is known to affect brain development and has been linked to an increased risk for schizophrenia. The present study aimed to determine whether neonatal infection produced long-term disruptions in behaviour and pathology that might provide a parallel with that observed in schizophrenia. Rats were administered lipopolysaccharide (LPS; 500 microg/kg i.p.) on postnatal day 7 and 9. Locomotor activity and object recognition memory were tested at day 35 and day 70. LPS animals were observed to be less active at adulthood as measured by locomotor activity. With regards to object recognition memory, LPS administration produced no early impairment in task performance, however, at day 70 LPS animals spent significantly less time exploring the novel object than control animals. Analysis of brains showed a reduction in expression of parvalbumin immunoreactive neurons in the hippocampus of LPS animals with significant reductions selectively localised to the CA1-CA3 region, and not the dentate gyrus. No changes were observed in prefrontal cortex. These results show that neonatal LPS results in pathophysiological brain changes in hippocampal CA1-CA3 subregions.

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Crossref · 10.1016/j.bbr.2009.07.014

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  • Early-life pro-inflammatory conditions, such as maternal and neonatal immune challenges, cause a persistent decrease in the number of prefrontal and/or hippocampal parvalbumin-immunoreactive interneurons.

    “Early-life pro-inflammatory conditions, such as maternal and neonatal immune challenges, cause a persistent decrease in number of prefrontal and/or hippocampal parvalbumin-immunoreactive interneurons (Jenkins et al., 2009; Meyer et al., 2008).”

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Authors
Jenkins, T. A., Harte, M. K., Stenson, G., & Reynolds, G. P.
Affiliations
Queen's University Belfast (GB)
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2009-12-28
Volume
205
Issue
2
Pages
355-359
ISSN
0166-4328 (ISSN-L)
OpenAlex
W2027266077
Cited by
61
References
47
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 4 · 2017: 4 · 2016: 6 · 2015: 4 · 2014: 9 · 2013: 7 · 2012: 5
FWCI
1.63
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (publishedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
neonatal infection, parvalbumin, hippocampus, CA1-CA3, object recognition memory, locomotor activity, schizophrenia, brain development, prefrontal cortex
MeSH terms
Aging, Animals, Animals, Newborn, Female, Lipopolysaccharides, Locomotion, Male, Neurons, Neuropsychological Tests, Parvalbumins, Rats, Inbred Strains, Prefrontal Cortex, Dentate Gyrus, Recognition, Psychology, Rats, CA1 Region, Hippocampal, CA3 Region, Hippocampal

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