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APOE genotype modulates the effect of serum calcium levels on cognitive function in old age.
Neurology. 2009 Mar 03; 72(9):821-8.Neur

Abstract

OBJECTIVE

The APOE genotype and serum calcium levels have both been associated with cognitive impairment. Animal studies have shown variation in apoE isoforms to play a critical role in intraneuronal calcium homeostasis, but the contribution of this interaction to cognitive function in man is unknown. Here, we studied whether the APOE genotype modulates the association between serum calcium levels and cognition.

METHODS

Within the Leiden 85-plus Study, a prospective population-based study of 599 subjects aged 85 years, we measured serum calcium levels and APOE genotype at baseline. During a 5-year follow-up period, cognitive function was annually assessed using the Mini-Mental State Examination (MMSE) and a standardized neuropsychological test battery.

RESULTS

Both at baseline and during follow-up, high serum calcium levels were associated with worse cognitive function in epsilon3epsilon4 carriers and to a lesser extent in epsilon3epsilon3 carriers, but not in epsilon2epsilon3 carriers. The MMSE score during the entire follow-up period differed between those with high and low serum calcium levels, with 5.5 points in epsilon3epsilon4 carriers (p < 0.001), 1.6 points in epsilon3epsilon3 carriers (p = 0.010), and 0.1 point in epsilon2epsilon3 carriers (p = 0.935). Formal testing showed an interaction between APOE genotype and serum calcium levels in relation to global cognitive function (p = 0.003).

CONCLUSIONS

In old age, APOE genotype modulates the association between serum calcium levels and cognitive function. High serum calcium levels associate with worse cognitive function, especially in APOE epsilon4 allele carriers, but not in carriers of the epsilon2 allele.

Authors+Show Affiliations

Leiden University Medical Center, Department of Gerontology and Geriatrics (C2-R), Leiden, The Netherlands. p.van_vliet@lumc.nlNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19255409

Citation

van Vliet, P, et al. "APOE Genotype Modulates the Effect of Serum Calcium Levels On Cognitive Function in Old Age." Neurology, vol. 72, no. 9, 2009, pp. 821-8.
van Vliet P, Oleksik AM, Mooijaart SP, et al. APOE genotype modulates the effect of serum calcium levels on cognitive function in old age. Neurology. 2009;72(9):821-8.
van Vliet, P., Oleksik, A. M., Mooijaart, S. P., de Craen, A. J., & Westendorp, R. G. (2009). APOE genotype modulates the effect of serum calcium levels on cognitive function in old age. Neurology, 72(9), 821-8. https://doi.org/10.1212/01.wnl.0000343852.10018.24
van Vliet P, et al. APOE Genotype Modulates the Effect of Serum Calcium Levels On Cognitive Function in Old Age. Neurology. 2009 Mar 3;72(9):821-8. PubMed PMID: 19255409.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - APOE genotype modulates the effect of serum calcium levels on cognitive function in old age. AU - van Vliet,P, AU - Oleksik,A M, AU - Mooijaart,S P, AU - de Craen,A J M, AU - Westendorp,R G J, PY - 2009/3/4/entrez PY - 2009/3/4/pubmed PY - 2009/3/26/medline SP - 821 EP - 8 JF - Neurology JO - Neurology VL - 72 IS - 9 N2 - OBJECTIVE: The APOE genotype and serum calcium levels have both been associated with cognitive impairment. Animal studies have shown variation in apoE isoforms to play a critical role in intraneuronal calcium homeostasis, but the contribution of this interaction to cognitive function in man is unknown. Here, we studied whether the APOE genotype modulates the association between serum calcium levels and cognition. METHODS: Within the Leiden 85-plus Study, a prospective population-based study of 599 subjects aged 85 years, we measured serum calcium levels and APOE genotype at baseline. During a 5-year follow-up period, cognitive function was annually assessed using the Mini-Mental State Examination (MMSE) and a standardized neuropsychological test battery. RESULTS: Both at baseline and during follow-up, high serum calcium levels were associated with worse cognitive function in epsilon3epsilon4 carriers and to a lesser extent in epsilon3epsilon3 carriers, but not in epsilon2epsilon3 carriers. The MMSE score during the entire follow-up period differed between those with high and low serum calcium levels, with 5.5 points in epsilon3epsilon4 carriers (p < 0.001), 1.6 points in epsilon3epsilon3 carriers (p = 0.010), and 0.1 point in epsilon2epsilon3 carriers (p = 0.935). Formal testing showed an interaction between APOE genotype and serum calcium levels in relation to global cognitive function (p = 0.003). CONCLUSIONS: In old age, APOE genotype modulates the association between serum calcium levels and cognitive function. High serum calcium levels associate with worse cognitive function, especially in APOE epsilon4 allele carriers, but not in carriers of the epsilon2 allele. SN - 1526-632X UR - https://www.unboundmedicine.com/medline/citation/19255409/APOE_genotype_modulates_the_effect_of_serum_calcium_levels_on_cognitive_function_in_old_age_ L2 - http://www.neurology.org/cgi/pmidlookup?view=long&amp;pmid=19255409 DB - PRIME DP - Unbound Medicine ER -