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Enzymatic antioxidant balance and cognitive decline in aging — the EVA study

  • Neuro-Epidemiology
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Abstract

We studied whether primary enzymatic antioxidant protection should influence cognitive decline (CD) in subjects aged 62–72 years volunteers in the Etude du Vieillissement Antériel (EVA) cohort. At baseline, we measured red blood cells activities of two enzymes: cytoplasmic form of superoxide dismutase (CuZn-SOD) and seleno dependent glutathione peroxidase (GSH-Px). During the 4 year-follow up (follow-up rate of 81%), a drop of at least 3 points in MMSE score was observed in 71 subjects (7.2%) defining individuals with CD+ among the 980 individuals. Initial GSH-Px activity appeared to be significantly lower in individual CD+ (41.2 ± 10.3 U/g Hb vs. 44.4 ± 9.4 in CD−, p = 0.008). Conversely, there was an increase of CuZn—SOD activity in CD+ subjects (1.13 ± 0.10 U/mg Hb vs. 1.10 ± 0.10, p = 0.05). Taking into account the ratio between these two levels suggest that the equilibrium between these two enzymes, an important determinant of oxidative stress level, is associated with CD. These results are independent of other potential risk factors for CD (education, Apolipoprotein E, hypertension) and suggest that this primary enzymatic system could be related to CD during aging.

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Authors and Affiliations

  1. INSERM U360, Recherches épidémiologique en neurologie et psychopathologie, Hôpital de la Salpêtrière, Paris, France

    Claudine Berr & Véronique Gourlet

  2. INSERM E0361, Pathologies du système nerveux, recherche clinique et épidémiologique, Hôpital La Colombiere, Montpellier, France

    Claudine Berr

  3. Laboratoire de biologie du stress oxydant, Université de Grenoble I, La Tronche, France

    Marie-Jeanne Richard, Catherine Garrel & Alain Favier

Authors
  1. Claudine Berr
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  2. Marie-Jeanne Richard
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  3. Véronique Gourlet
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  4. Catherine Garrel
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  5. Alain Favier
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Correspondence to Claudine Berr.

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Berr, C., Richard, MJ., Gourlet, V. et al. Enzymatic antioxidant balance and cognitive decline in aging — the EVA study. Eur J Epidemiol 19, 133–138 (2004). https://doi.org/10.1023/B:EJEP.0000017830.27594.e9

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  • DOI: https://doi.org/10.1023/B:EJEP.0000017830.27594.e9

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