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Molecular Neurobiology

, Volume 55, Issue 3, pp 1966–1976 | Cite as

Homocysteine Induces Glial Reactivity in Adult Rat Astrocyte Cultures

  • Aline Longoni
  • Bruna Bellaver
  • Larissa Daniele Bobermin
  • Camila Leite Santos
  • Yasmine Nonose
  • Janaina Kolling
  • Tiago M. dos Santos
  • Adriano M. de Assis
  • André Quincozes-Santos
  • Angela T. S. Wyse
Article

Abstract

Astrocytes are dynamic glial cells associated to neurotransmitter systems, metabolic functions, antioxidant defense, and inflammatory response, maintaining the brain homeostasis. Elevated concentrations of homocysteine (Hcy) are involved in the pathogenesis of age-related neurodegenerative disorders, such as Parkinson and Alzheimer diseases. In line with this, our hypothesis was that Hcy could promote glial reactivity in a model of cortical primary astrocyte cultures from adult Wistar rats. Thus, cortical astrocytes were incubated with different concentrations of Hcy (10, 30, and 100 μM) during 24 h. After the treatment, we analyzed cell viability, morphological parameters, antioxidant defenses, and inflammatory response. Hcy did not induce any alteration in cell viability; however, it was able to induce cytoskeleton rearrangement. The treatment with Hcy also promoted a significant decrease in the activities of Na+, K+ ATPase, superoxide dismutase (SOD), and glutathione peroxidase (GPx), as well as in the glutathione (GSH) content. Additionally, Hcy induced an increase in the pro-inflammatory cytokine release. In an attempt to elucidate the putative mechanisms involved in the Hcy-induced glial reactivity, we measured the nuclear factor kappa B (NFκB) transcriptional activity and heme oxygenase 1 (HO-1) expression, which were activated and inhibited by Hcy, respectively. In summary, our findings provide important evidences that Hcy modulates critical astrocyte parameters from adult rats, which might be associated to the aging process.

Keywords

Homocysteine Cortical adult astrocytes Oxidative stress Inflammatory response NFκB Heme oxygenase 1 

Notes

Acknowledgements

This work was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS), Financiadora de Estudos e Projetos (FINEP)—Instituto Brasileiro de Neurociências (IBN Net) 01.06.0842-00, Federal University of Rio Grande do Sul (UFRGS), and Instituto Nacional de Ciência e Tecnologia para Excitotoxicidade e Neuroproteçãao (INCTEN/CNPq).

Compliance with Ethical Standards

Our work has followed the National Institute of Health Guide for the Care and Use of Laboratory Animals “Guide for the Care and Use of Laboratory Animals” (NIH publication No. 80-23, revised 1996), and experiments were approved by the local Ethics Commission (CEUA/UFRGS), under the project number 26073.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Aline Longoni
    • 1
  • Bruna Bellaver
    • 1
  • Larissa Daniele Bobermin
    • 1
  • Camila Leite Santos
    • 1
  • Yasmine Nonose
    • 1
  • Janaina Kolling
    • 1
  • Tiago M. dos Santos
    • 1
  • Adriano M. de Assis
    • 1
  • André Quincozes-Santos
    • 1
    • 2
  • Angela T. S. Wyse
    • 1
    • 2
  1. 1.Programa de Pós-graduação em Ciências Biológicas: Bioquímica, ICBS, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  2. 2.Departamento de Bioquímica, ICBSUniversidade Federal do Rio Grande do SulPorto AlegreBrazil

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