Cited by 103Neuroinflammation and Neurodegeneration MechanismsTraumatic Brain Injury and Neurovascular DisturbancesTryptophan and brain disorders

Tauroursodeoxycholic acid reduces glial cell activation in an animal model of acute neuroinflammation

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Yanguas-Casás, Natalia, Barreda-Manso, M Asunción, Nieto-Sampedro, Manuel, Romero-Ramírez, Lorenzo·2014·Journal of Neuroinflammation

Abstract

BACKGROUND: Bile acids are steroid acids found predominantly in the bile of mammals. The bile acid conjugate tauroursodeoxycholic acid (TUDCA) is a neuroprotective agent in different animal models of stroke and neurological diseases. However, the anti-inflammatory properties of TUDCA in the central nervous system (CNS) remain unknown. METHODS: The acute neuroinflammation model of intracerebroventricular (icv) injection with bacterial lipopolysaccharide (LPS) in C57BL/6 adult mice was used herein. Immunoreactivity against Iba-1, GFAP, and VCAM-1 was measured in coronal sections in the mice hippocampus. Primary cultures of microglial cells and astrocytes were obtained from neonatal Wistar rats. Glial cells were treated with proinflammatory stimuli to determine the effect of TUDCA on nitrite production and activation of inducible enzyme nitric oxide synthase (iNOS) and NFκB luciferase reporters. We studied the effect of TUDCA on transcriptional induction of iNOS and monocyte chemotactic protein-1 (MCP-1) mRNA as well as induction of protein expression and phosphorylation of different proteins from the NFκB pathway. RESULTS: TUDCA specifically reduces microglial reactivity in the hippocampus of mice treated by icv injection of LPS. TUDCA treatment reduced the production of nitrites by microglial cells and astrocytes induced by proinflammatory stimuli that led to transcriptional and translational diminution of the iNOS. This effect might be due to inhibition of the NFκB pathway, activated by proinflammatory stimuli. TUDCA decreased in vitro microglial migration induced by both IFN-γ and astrocytes treated with LPS plus IFN-γ. TUDCA inhibition of MCP-1 expression induced by proinflammatory stimuli could be in part responsible for this effect. VCAM-1 inmunoreactivity in the hippocampus of animals treated by icv LPS was reduced by TUDCA treatment, compared to animals treated with LPS alone. CONCLUSIONS: We show a triple anti-inflammatory effect of TUDCA on glial cells: i) reduced glial cell activation, ii) reduced microglial cell migratory capacity, and iii) reduced expression of chemoattractants (e.g., MCP-1) and vascular adhesion proteins (e.g., VCAM-1) required for microglial migration and blood monocyte invasion to the CNS inflammation site. Our results present a novel TUDCA anti-inflammatory mechanism, with therapeutic implications for inflammatory CNS diseases.

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Authors
Yanguas-Casás, N., Barreda-Manso, M. A., Nieto-Sampedro, M., & Romero-Ramírez, L.
Affiliations
Instituto Cajal (ES)
Venue
Journal of Neuroinflammation
Published
2014-03-19
Volume
11
Issue
1
Pages
50-50
ISSN
1742-2094 (ISSN-L)
OpenAlex
W2119521536
Cited by
103
References
33
Citations by year
2026: 7 · 2025: 7 · 2024: 12 · 2023: 6 · 2022: 13 · 2021: 13 · 2020: 3 · 2019: 7 · 2018: 6 · 2017: 8 · 2016: 7 · 2015: 8 · 2014: 5
FWCI
4.86
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by)
Funders
Ministerio de Ciencia e Innovación (SAF2009-11257, SAF2012-40126)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
tauroursodeoxycholic acid, bile acids, neuroinflammation, glial activation, microglial activation, astrocytes, lipopolysaccharide, NF-κB signaling, nitric oxide synthase, MCP-1, VCAM-1, microglial migration, hippocampus, anti-inflammatory activity, neuroprotection, blood-brain barrier
MeSH terms
Animals, Animals, Newborn, Calcium-Binding Proteins, Cell Movement, Cells, Cultured, Cholagogues and Choleretics, Disease Models, Animal, Encephalitis, Gene Expression Regulation, Glial Fibrillary Acidic Protein, Hippocampus, Injections, Intraventricular, Lipopolysaccharides, Mice, Inbred C57BL, Microfilament Proteins, Neuroglia, Nitrites, Taurochenodeoxycholic Acid, Rats, Wistar, Vascular Cell Adhesion Molecule-1, Cell Proliferation

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