Tags

Type your tag names separated by a space and hit enter

Homocysteine, B vitamin status, and cognitive function in the elderly.
Am J Clin Nutr 2002; 75(5):908-13AJ

Abstract

BACKGROUND

Old age is associated with reduced cognitive performance. Nutritional factors may contribute to this association.

OBJECTIVE

We tested associations between cognitive performance and plasma vitamin B-12, folate, and homocysteine concentrations in the elderly.

DESIGN

We studied survivors of the Scottish Mental Surveys of 1932 (Aberdeen 1921 Birth Cohort, or ABC21) and 1947 (Aberdeen 1936 Birth Cohort, or ABC36), which surveyed childhood intelligence quotient. We measured folate, vitamin B-12, and homocysteine concentrations in fasting blood samples and cognitive performance by the Mini Mental State Examination (MMSE), National Adult Reading Test (NART), Raven's Progressive Matrices (RPM), Auditory Verbal Learning Test (AVLT), digit symbol (DS) subtest, and block design (BD) subtest.

RESULTS

Homocysteine was higher in the ABC21 than in the ABC36 (P < 0.0001). There were positive correlations between folate and vitamin B-12 and negative correlations between homocysteine and both folate and vitamin B-12. MMSE, RPM, AVLT, DS, and BD scores were higher in the ABC36. In the ABC21, folate, vitamin B-12, and MMSE score were positively correlated and homocysteine was negatively correlated with RPM, DS, and BD scores. Folic acid was positively correlated with AVLT and DS scores. In the ABC36, folate was positively correlated with BD score. After adjustment for childhood intelligence quotient, partial correlations were strengthened between vitamin B-12 and NART score and between homocysteine and RPM score but weakened between red blood cell folate and DS score.

CONCLUSIONS

B vitamins and homocysteine are associated with cognitive variation in old age. In the ABC21 but not the ABC36, homocysteine accounted for approximately 7-8% of the variance in cognitive performance. This may prove relevant to the design of neuroprotective studies in late life.

Authors+Show Affiliations

Rowett Research Institute, Aberdeen, United Kingdom. sd@rri.sari.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

11976166

Citation

Duthie, Susan J., et al. "Homocysteine, B Vitamin Status, and Cognitive Function in the Elderly." The American Journal of Clinical Nutrition, vol. 75, no. 5, 2002, pp. 908-13.
Duthie SJ, Whalley LJ, Collins AR, et al. Homocysteine, B vitamin status, and cognitive function in the elderly. Am J Clin Nutr. 2002;75(5):908-13.
Duthie, S. J., Whalley, L. J., Collins, A. R., Leaper, S., Berger, K., & Deary, I. J. (2002). Homocysteine, B vitamin status, and cognitive function in the elderly. The American Journal of Clinical Nutrition, 75(5), pp. 908-13.
Duthie SJ, et al. Homocysteine, B Vitamin Status, and Cognitive Function in the Elderly. Am J Clin Nutr. 2002;75(5):908-13. PubMed PMID: 11976166.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Homocysteine, B vitamin status, and cognitive function in the elderly. AU - Duthie,Susan J, AU - Whalley,Lawrence J, AU - Collins,Andrew R, AU - Leaper,Steve, AU - Berger,Kerstin, AU - Deary,Ian J, PY - 2002/4/27/pubmed PY - 2002/5/29/medline PY - 2002/4/27/entrez SP - 908 EP - 13 JF - The American journal of clinical nutrition JO - Am. J. Clin. Nutr. VL - 75 IS - 5 N2 - BACKGROUND: Old age is associated with reduced cognitive performance. Nutritional factors may contribute to this association. OBJECTIVE: We tested associations between cognitive performance and plasma vitamin B-12, folate, and homocysteine concentrations in the elderly. DESIGN: We studied survivors of the Scottish Mental Surveys of 1932 (Aberdeen 1921 Birth Cohort, or ABC21) and 1947 (Aberdeen 1936 Birth Cohort, or ABC36), which surveyed childhood intelligence quotient. We measured folate, vitamin B-12, and homocysteine concentrations in fasting blood samples and cognitive performance by the Mini Mental State Examination (MMSE), National Adult Reading Test (NART), Raven's Progressive Matrices (RPM), Auditory Verbal Learning Test (AVLT), digit symbol (DS) subtest, and block design (BD) subtest. RESULTS: Homocysteine was higher in the ABC21 than in the ABC36 (P < 0.0001). There were positive correlations between folate and vitamin B-12 and negative correlations between homocysteine and both folate and vitamin B-12. MMSE, RPM, AVLT, DS, and BD scores were higher in the ABC36. In the ABC21, folate, vitamin B-12, and MMSE score were positively correlated and homocysteine was negatively correlated with RPM, DS, and BD scores. Folic acid was positively correlated with AVLT and DS scores. In the ABC36, folate was positively correlated with BD score. After adjustment for childhood intelligence quotient, partial correlations were strengthened between vitamin B-12 and NART score and between homocysteine and RPM score but weakened between red blood cell folate and DS score. CONCLUSIONS: B vitamins and homocysteine are associated with cognitive variation in old age. In the ABC21 but not the ABC36, homocysteine accounted for approximately 7-8% of the variance in cognitive performance. This may prove relevant to the design of neuroprotective studies in late life. SN - 0002-9165 UR - https://www.unboundmedicine.com/medline/citation/11976166/Homocysteine_B_vitamin_status_and_cognitive_function_in_the_elderly_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/75.5.908 DB - PRIME DP - Unbound Medicine ER -