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Assessment of erythrocyte phospholipid fatty acid composition as a biomarker for dietary MUFA, PUFA or saturated fatty acid intake in a controlled cross-over intervention trial.
Lipids Health Dis. 2005 Dec 05; 4:30.LH

Abstract

BACKGROUND

Dietary intervention trials rely on self-reported measures of intake for assessment of energy and macronutrient composition. Dietary fat intake is of particular interest due to strong associations with pathophysiology. In epidemiological trials phospholipid fatty acid composition may reflect composition of habitual diet, although strong correlations have been identified only for essential polyunsaturated fatty acids (PUFAs). Preliminary evidence shows that saturated fatty acids (SFA) C15:0 and C17:0 may be acceptable biomarkers. This study measured changes in erythrocyte membrane fatty acids during a period of strictly controlled fat feeding to investigate their use as a short-term marker of compliance, particularly for intake of SFAs.

RESULTS

This was a randomised cross-over trial in which diet was provided and strictly controlled. 20 healthy, male subjects were given a 40 energy % (en%) fat diet, high in saturated (high-SFA, 20 en%) or unsaturated (high-USFA, 24 en%) fatty acids for 2 periods of 3 weeks. Subjects were residential during intervention with all food and beverages provided. Dietary composition was verified by direct chemical analysis. Blood samples were collected on days 1,7,14, 21 and analysed for red blood cell (RBC) membrane fatty acid composition. Pearson correlation showed RBC fatty acid composition to mimic dietary composition by 3 weeks, but the relationships were weak. Of the SFAs only RBC C16:0 decreased in response to decreased dietary content on high-USFA treatment (ANOVA, diet, P < 0.05). Of the USFAs, higher levels of C18:1 MUFA, C20:4 and C22:6 long chain PUFA on high-USFA diet lead to higher C18:1, C20:4 and C22:6 within RBCs (ANOVA, time*diet, P < 0.05). Pearson's correlation was significant between dietary and RBC fatty acids during the 21d dietary manipulation for C18:1, and C20:5, C22:6 only (P < 0.05).

CONCLUSION

RBC membrane fatty acids cannot reliably be used as an independent measure of compliance for dietary SFA intake in short-term studies. The MUFA oleic acid and PUFAs EPA and DHA may be more useful as markers of compliance during short term intervention trials.

Authors+Show Affiliations

Human Nutrition Unit, University of Auckland, Auckland, New Zealand. s.poppitt@auckland.ac.nzNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

16329761

Citation

Poppitt, Sally D., et al. "Assessment of Erythrocyte Phospholipid Fatty Acid Composition as a Biomarker for Dietary MUFA, PUFA or Saturated Fatty Acid Intake in a Controlled Cross-over Intervention Trial." Lipids in Health and Disease, vol. 4, 2005, p. 30.
Poppitt SD, Kilmartin P, Butler P, et al. Assessment of erythrocyte phospholipid fatty acid composition as a biomarker for dietary MUFA, PUFA or saturated fatty acid intake in a controlled cross-over intervention trial. Lipids Health Dis. 2005;4:30.
Poppitt, S. D., Kilmartin, P., Butler, P., & Keogh, G. F. (2005). Assessment of erythrocyte phospholipid fatty acid composition as a biomarker for dietary MUFA, PUFA or saturated fatty acid intake in a controlled cross-over intervention trial. Lipids in Health and Disease, 4, 30.
Poppitt SD, et al. Assessment of Erythrocyte Phospholipid Fatty Acid Composition as a Biomarker for Dietary MUFA, PUFA or Saturated Fatty Acid Intake in a Controlled Cross-over Intervention Trial. Lipids Health Dis. 2005 Dec 5;4:30. PubMed PMID: 16329761.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of erythrocyte phospholipid fatty acid composition as a biomarker for dietary MUFA, PUFA or saturated fatty acid intake in a controlled cross-over intervention trial. AU - Poppitt,Sally D, AU - Kilmartin,Paul, AU - Butler,Paul, AU - Keogh,Geraldine F, Y1 - 2005/12/05/ PY - 2005/11/08/received PY - 2005/12/05/accepted PY - 2005/12/7/pubmed PY - 2006/5/26/medline PY - 2005/12/7/entrez SP - 30 EP - 30 JF - Lipids in health and disease JO - Lipids Health Dis VL - 4 N2 - BACKGROUND: Dietary intervention trials rely on self-reported measures of intake for assessment of energy and macronutrient composition. Dietary fat intake is of particular interest due to strong associations with pathophysiology. In epidemiological trials phospholipid fatty acid composition may reflect composition of habitual diet, although strong correlations have been identified only for essential polyunsaturated fatty acids (PUFAs). Preliminary evidence shows that saturated fatty acids (SFA) C15:0 and C17:0 may be acceptable biomarkers. This study measured changes in erythrocyte membrane fatty acids during a period of strictly controlled fat feeding to investigate their use as a short-term marker of compliance, particularly for intake of SFAs. RESULTS: This was a randomised cross-over trial in which diet was provided and strictly controlled. 20 healthy, male subjects were given a 40 energy % (en%) fat diet, high in saturated (high-SFA, 20 en%) or unsaturated (high-USFA, 24 en%) fatty acids for 2 periods of 3 weeks. Subjects were residential during intervention with all food and beverages provided. Dietary composition was verified by direct chemical analysis. Blood samples were collected on days 1,7,14, 21 and analysed for red blood cell (RBC) membrane fatty acid composition. Pearson correlation showed RBC fatty acid composition to mimic dietary composition by 3 weeks, but the relationships were weak. Of the SFAs only RBC C16:0 decreased in response to decreased dietary content on high-USFA treatment (ANOVA, diet, P < 0.05). Of the USFAs, higher levels of C18:1 MUFA, C20:4 and C22:6 long chain PUFA on high-USFA diet lead to higher C18:1, C20:4 and C22:6 within RBCs (ANOVA, time*diet, P < 0.05). Pearson's correlation was significant between dietary and RBC fatty acids during the 21d dietary manipulation for C18:1, and C20:5, C22:6 only (P < 0.05). CONCLUSION: RBC membrane fatty acids cannot reliably be used as an independent measure of compliance for dietary SFA intake in short-term studies. The MUFA oleic acid and PUFAs EPA and DHA may be more useful as markers of compliance during short term intervention trials. SN - 1476-511X UR - https://www.unboundmedicine.com/medline/citation/16329761/Assessment_of_erythrocyte_phospholipid_fatty_acid_composition_as_a_biomarker_for_dietary_MUFA_PUFA_or_saturated_fatty_acid_intake_in_a_controlled_cross_over_intervention_trial_ L2 - https://lipidworld.biomedcentral.com/articles/10.1186/1476-511X-4-30 DB - PRIME DP - Unbound Medicine ER -