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Raised homocysteine and low folate and vitamin B-12 concentrations predict cognitive decline in community-dwelling older Japanese adults.
Clin Nutr 2008; 27(6):865-71CN

Abstract

BACKGROUND & AIMS

Recently, poor cognition and dementia have been associated with elevated homocysteine and low B vitamin concentrations. The aim of this study is to examine the association in community-dwelling older Japanese adults.

METHODS

Ninety-nine subjects (71 women and 28 men; mean age 75 years) were eligible for analysis after exclusion of subjects with high serum creatinine concentrations (1.3mg/dl and over) and those taking vitamin supplements. Fasting blood samples were analyzed for plasma total homocysteine, serum folate, and serum vitamin B-12. Global cognitive function was assessed using the Mini-Mental State Examination (MMSE).

RESULTS

Multiple regression analysis revealed that homocysteine concentrations were predicted by concentrations of vitamin B-12 (p<0.001), folate (p<0.005), and creatinine (p<0.001) and age (p<0.005). Scores on the MMSE were associated with concentrations of homocysteine, vitamin B-12, and folate. The association between folate or vitamin B-12 concentrations and MMSE scores remained significant after adjusting for homocysteine concentrations. Folate concentrations, but neither homocysteine nor vitamin B-12 concentrations, were significantly associated with serum albumin concentrations.

CONCLUSIONS

Reduced folate and vitamin B-12 concentrations were independently associated with cognitive decline. The correlation between folate and albumin concentrations may imply that the reduction of folate in the Japanese older population is due to nutritional deficiency.

Authors+Show Affiliations

Department of Geriatricas, Nagoya University Graduate School of Medicine, Japan. tekoike@aol.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18835069

Citation

Koike, Teruhiko, et al. "Raised Homocysteine and Low Folate and Vitamin B-12 Concentrations Predict Cognitive Decline in Community-dwelling Older Japanese Adults." Clinical Nutrition (Edinburgh, Scotland), vol. 27, no. 6, 2008, pp. 865-71.
Koike T, Kuzuya M, Kanda S, et al. Raised homocysteine and low folate and vitamin B-12 concentrations predict cognitive decline in community-dwelling older Japanese adults. Clin Nutr. 2008;27(6):865-71.
Koike, T., Kuzuya, M., Kanda, S., Okada, K., Izawa, S., Enoki, H., & Iguchi, A. (2008). Raised homocysteine and low folate and vitamin B-12 concentrations predict cognitive decline in community-dwelling older Japanese adults. Clinical Nutrition (Edinburgh, Scotland), 27(6), pp. 865-71. doi:10.1016/j.clnu.2008.08.006.
Koike T, et al. Raised Homocysteine and Low Folate and Vitamin B-12 Concentrations Predict Cognitive Decline in Community-dwelling Older Japanese Adults. Clin Nutr. 2008;27(6):865-71. PubMed PMID: 18835069.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Raised homocysteine and low folate and vitamin B-12 concentrations predict cognitive decline in community-dwelling older Japanese adults. AU - Koike,Teruhiko, AU - Kuzuya,Masafumi, AU - Kanda,Shigeru, AU - Okada,Kiwako, AU - Izawa,Sachiko, AU - Enoki,Hiromi, AU - Iguchi,Akihisa, Y1 - 2008/10/02/ PY - 2007/06/28/received PY - 2008/07/28/revised PY - 2008/08/25/accepted PY - 2008/10/7/pubmed PY - 2009/2/25/medline PY - 2008/10/7/entrez SP - 865 EP - 71 JF - Clinical nutrition (Edinburgh, Scotland) JO - Clin Nutr VL - 27 IS - 6 N2 - BACKGROUND & AIMS: Recently, poor cognition and dementia have been associated with elevated homocysteine and low B vitamin concentrations. The aim of this study is to examine the association in community-dwelling older Japanese adults. METHODS: Ninety-nine subjects (71 women and 28 men; mean age 75 years) were eligible for analysis after exclusion of subjects with high serum creatinine concentrations (1.3mg/dl and over) and those taking vitamin supplements. Fasting blood samples were analyzed for plasma total homocysteine, serum folate, and serum vitamin B-12. Global cognitive function was assessed using the Mini-Mental State Examination (MMSE). RESULTS: Multiple regression analysis revealed that homocysteine concentrations were predicted by concentrations of vitamin B-12 (p<0.001), folate (p<0.005), and creatinine (p<0.001) and age (p<0.005). Scores on the MMSE were associated with concentrations of homocysteine, vitamin B-12, and folate. The association between folate or vitamin B-12 concentrations and MMSE scores remained significant after adjusting for homocysteine concentrations. Folate concentrations, but neither homocysteine nor vitamin B-12 concentrations, were significantly associated with serum albumin concentrations. CONCLUSIONS: Reduced folate and vitamin B-12 concentrations were independently associated with cognitive decline. The correlation between folate and albumin concentrations may imply that the reduction of folate in the Japanese older population is due to nutritional deficiency. SN - 1532-1983 UR - https://www.unboundmedicine.com/medline/citation/18835069/Raised_homocysteine_and_low_folate_and_vitamin_B_12_concentrations_predict_cognitive_decline_in_community_dwelling_older_Japanese_adults_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0261-5614(08)00157-X DB - PRIME DP - Unbound Medicine ER -