Lee, D.M. et al. (2010) Endogenous hormones, androgen receptor CAG repeat length and fluid cognition in middle-aged and older men: results from the European Male Ageing Study. European Journal of Endocrinology, 162(6), pp. 1155-1164. (doi: 10.1530/EJE-09-0970)
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Abstract
Objective: Data remain divergent regarding the activational effects of endogenous hormones on adult cognitive function. We examined the association between cognition, hormones and androgen receptor (AR) CAG repeat length in a large cohort of men. Design: Community-based, cross-sectional study of 3369 men aged 40–79 years. Methods: Cognition tests were the Rey-Osterrieth Complex Figure, Camden Topographical Recognition Memory and Digit-Symbol Substitution. A fluid cognition (FC) z-score was computed from the individual tests. Testosterone, oestradiol (OE2) and 5{alpha}-dihydrotestosterone were measured by gas chromatography–mass spectrometry; DHEAS, LH, FSH and sex hormone-binding globulin (SHBG) by electrochemiluminescence. Free testosterone and OE2 were calculated from total hormone, SHBG and albumin. CAG repeat lengths were assayed by PCR genotyping. Results: Total testosterone and free testosterone were associated with higher FC z-scores, LH and FSH with lower FC z-scores in age-adjusted linear regressions. After adjusting for health, lifestyle and centre, a modest association was only observed between DHEAS and a lower FC z-score (β=–0.011, P=0.02), although this was driven by subjects with DHEAS levels >10 µmol/l. Locally weighted plots revealed no threshold effects between hormones and FC. There was no association between CAG repeat length and FC z-score after adjustment for age and centre (β=–0.007, P=0.06), nor any interaction effect between CAG repeat length and hormones. Conclusion: Our results suggest that endogenous hormones are not associated with a vision-based measure of FC among healthy, community-dwelling men. Further studies are warranted to determine whether ‘high’ DHEAS levels are associated with poorer performance on a broader range of neuropsychological tests.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lean, Professor Michael |
| Authors: | Lee, D.M., Ulubaev, A., Tajar, A., Pye, S.R., Pendleton, N., Purandar, N., O'Neill, T.W., O'Connor, D.B., Labrie, F., Platt, H., Payne, D., Bartfai, G., Boonen, S., Casanueva, F.F., Finn, J.D., Forti, G., Giwercman, A., Han, T.S., Huhtaniemi, I.T., Kula, K., Lean, M., Punab, M., Silman, A.J., Vanderschueren, D., and Wu, F.C.W. |
| Subjects: | R Medicine > R Medicine (General) |
| College/School: | College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Clinical Specialities |
| Journal Name: | European Journal of Endocrinology |
| ISSN: | 0804-4643 |
| ISSN (Online): | 1479-683X |
| Published Online: | 15 March 2010 |
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