Effect of Alzheimer disease genetic risk disclosure on dietary supplement use  

Oleh:

Vernarelli, Jacqueline A ; Roberts, J Scott ; Hiraki, Susan ; Chen, Clara A ; Cupples, L Adrienne

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 91 no. 05 (May 2010), page 1402-1407 .
Topik: Alzheimer disease; dietary supplement

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2010.01 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Background: Genetic susceptibility testing for Alzheimer disease (AD) with APOE genotype disclosure is not recommended for clinical use but is available through direct-to-consumer (DTC) genetic testing companies. Little is known about whether APOE genotype disclosure would actually prompt changes in nutrition behaviors among at-risk individuals. Objective: We studied the effect of APOE genotype disclosure for AD risk assessment on dietary supplement use in adults with a family history of AD. Design: As part of a secondary analysis of data from the second Risk Evaluation and Education for Alzheimer's Disease Study, we examined the effect of genotype disclosure on health-behavior changes among 272 unaffected first-degree relatives of persons with AD. Results: Overall, 16% of all participants reported a change in dietary supplement use after AD risk assessment. Participants who learned that they had at least one copy of the risk-increasing ?4 allele (?4+) had 4.75 times the odds of reporting a change in dietary supplement use than did their counterparts who had an absence of the risk-increasing ?4 allele (?4-) (95% CI: 2.23, 10.10; P < 0.0001) after adjustment for age, sex, race, baseline supplement use, randomization arm, and educational level. There were no significant differences between APOE ?4+ and ?4- participants in changes in overall diet, exercise, or medications. Conclusions: In this sample of first-degree relatives receiving genetic susceptibility testing for AD, an APOE ?4+ genotype status was positively associated with dietary supplement use after risk disclosure. Such changes occurred despite the absence of evidence that supplement use reduces the risk of AD. Given the expansion of DTC genetic tests, this study highlights the need for future studies in disease risk communication.

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