Cited by 183Neuroinflammation and Neurodegeneration MechanismsTryptophan and brain disordersNeuroscience and Neuropharmacology Research

Inhibition of glial inflammatory activation and neurotoxicity by tricyclic antidepressants

Hwang, Jaegyu, Zheng, Long Tai, Ock, Jiyeon, Lee, Maan Gee, Kim, Sang-Hyun, Lee, Ho-Won, Lee, Won-Ha, Park, Hae-Chul +1 more·2008·Neuropharmacology

Abstract

Glial activation and neuroinflammatory processes play an important role in the pathogenesis of neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and HIV dementia. Activated glial cells can secrete various proinflammatory cytokines and neurotoxic mediators, which may contribute to neuronal cell death. Inhibition of glial activation may alleviate neurodegeneration under these conditions. In the present study, the antiinflammatory and neuroprotective effects of tricyclic antidepressants were investigated using cultured brain cells as a model. The results showed that clomipramine and imipramine significantly decreased the production of nitric oxide or tumor necrosis factor-alpha (TNF-alpha) in microglia and astrocyte cultures. Clomipramine and imipramine also attenuated the expression of inducible nitric oxide synthase and proinflammatory cytokines such as interleukin-1beta and TNF-alpha at mRNA levels. In addition, clomipramine and imipramine inhibited IkappaB degradation, nuclear translocation of the p65 subunit of NF-kappaB, and phosphorylation of p38 mitogen-activated protein kinase in the lipopolysaccharide-stimulated microglia cells. Moreover, clomipramine and imipramine were neuroprotective as the drugs reduced microglia-mediated neuroblastoma cell death in a microglia/neuron co-culture. Therefore, these results imply that clomipramine and imipramine have antiinflammatory and neuroprotective effects in the central nervous system by modulating glial activation.

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Crossref · 10.1016/j.neuropharm.2008.06.045

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Authors
Hwang, J., Zheng, L. T., Ock, J., Lee, M. G., Kim, S.-H., Lee, H.-W., Lee, W.-H., Park, H.-C., & Suk, K.
Affiliations
  • Kyungpook National University (KR)
  • Korea University Ansan Hospital (KR)
Corresponding author
Suk, Kyoungho
Venue
Neuropharmacology
Publisher
Elsevier BV
Published
2008-10
Volume
55
Issue
5
Pages
826-834
ISSN
0028-3908 (ISSN-L)
OpenAlex
W2045253296
Cited by
181
References
56
Citations by year
2026: 4 · 2025: 4 · 2024: 11 · 2023: 8 · 2022: 7 · 2021: 12 · 2020: 10 · 2019: 15 · 2018: 6 · 2017: 10 · 2016: 16 · 2015: 13 · 2014: 12 · 2013: 5 · 2012: 13
FWCI
7.66
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
tricyclic antidepressants, clomipramine, imipramine, glial activation, neuroinflammation, neuroprotection, microglia, astrocytes, nitric oxide, inducible nitric oxide synthase, TNF-α, IL-1β, NF-κB, p38 MAPK, lipopolysaccharide, neurodegenerative diseases
MeSH terms
NF-kappaB-Inducing Kinase, Analysis of Variance, Animals, Animals, Newborn, Antidepressive Agents, Tricyclic, Brain, Cell Survival, Cells, Cultured, Clomipramine, Dose-Response Relationship, Drug, Drug Interactions, Enzyme-Linked Immunosorbent Assay, Gene Expression Regulation, Imipramine, Neuroglia, Nitrites, Polysaccharides, Time Factors, Cytokines, Protein Serine-Threonine Kinases, I-kappa B Proteins, p38 Mitogen-Activated Protein Kinases, Mice

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