APOE Genotype Disclosure and Lifestyle Advice in a Randomized Intervention Study with Finnish Participants

Heidi M Leskinen, Maaria Tringham, Heli Karjalainen, Terhi K Iso-Touru, Hanna-Leena Hietaranta-Luoma, Pertti J Marnila, Juha-Matti Pihlava, Timo Hurme, Santeri J Kankaanpää, Hannu Puolijoki, Kari Åkerman, Laura Tanner, Mari Sandell, Kirsi Vähäkangas, Anu Hopia, Raija Tahvonen, L Susanna Rokka

Research output: Contribution to journalArticleScientificpeer-review

Abstract

BACKGROUND: The APOE ε4 allele is associated with higher risks of cardiovascular diseases and Alzheimer disease than ε3 and ε2.

OBJECTIVES: We studied the effectiveness of dietary and lifestyle guidance and personal genetic risk information [ε4 carrier (ε4+); ε4 noncarrier (ε4-)] as motivators for a healthier lifestyle.

METHODS: A total of 188 healthy Finnish volunteers (82.4% women; mean ± SD age: 51.0 ± 5.6 y; BMI: 26.0 ± 3.6 kg/m2; total cholesterol: 5.2 ± 0.9 mmol/L) participated in our randomized intervention study. The participants were genotyped for APOE and divided into intervention (INT; INTε4+, n = 33; INTε4-, n = 57) and control groups (CTRL; CTRLε4+, n = 36; CTRLε4-, n = 62). Blood samples, measured observations, and questionnaire data were obtained at baseline and at 1 and 1.5 y. INT participants received their ε4 carrier status at baseline. Monthly Internet-based guidance based on the Finnish Dietary guidelines was provided for all.

RESULTS: The proportion of SFAs in plasma over time fluctuated less in INTε4+ than in the other groups (P-interaction < 0.05; primary outcome). The lifestyle guidance increased vegetable consumption from 3.5 to 3.6 portions/d, improved the dietary fat quality score by 5.3%, increased the plasma n-3 (ω-3) FA proportion by 7.3%, and decreased the consumption of high-fat/high-sugar foods from 7.3 to 6.5 portions/wk and total- and LDL-cholesterol concentrations by 4.3% and 6.1%, respectively, in the entire participant population (P < 0.05; secondary outcome). Compared with the ε4- participants, ε4+ participants had 2.4% higher plasma n-6 (ω-6) FA, lower C-peptide (3.9 compared with 4.2 nmol/L × h) and sensitive C-reactive protein values, and decreased plasma malondialdehyde concentrations over time (P < 0.05; secondary outcome).

CONCLUSIONS: Lifestyle guidance given to healthy Finnish participants yielded small but beneficial changes. The INTε4+ group did not seem markedly more responsive to the guidance than the other groups.This trial was registered at clinicaltrials.gov as NCT03794141.

Original languageEnglish
Pages (from-to)85-97
JournalJournal of Nutrition
Volume151
Issue number1
Early online date13 Nov 2020
DOIs
Publication statusPublished - Jan 2021
Publication typeA1 Journal article-refereed

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