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Chaudron Y, Boyer C, Marmonier C, Plourde M, Vachon A, Delplanque B, Taouis M, Pifferi F. A vegetable fat-based diet delays psychomotor and cognitive development compared with maternal dairy fat intake in infant gray mouse lemurs. Commun Biol 2024; 7:609. [PMID: 38769408 PMCID: PMC11106064 DOI: 10.1038/s42003-024-06255-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 04/26/2024] [Indexed: 05/22/2024] Open
Abstract
Dairy fat has a unique lipid profile; it is rich in short- and medium-chain saturated fatty acids that induce ketone production and has a balanced ω6/ω3 ratio that promotes cognitive development in early life. Moreover, the high consumption of vegetable oils in pregnant and lactating women raises concerns regarding the quality of lipids provided to offspring. Here, we investigate maternal dairy fat intake during gestation and lactation in a highly valuable primate model for infant nutritional studies, the gray mouse lemur (Microcebus murinus). Two experimental diets are provided to gestant mouse lemurs: a dairy fat-based (DF) or vegetable fat-based diet (VF). The psychomotor performance of neonates is tested during their first 30 days. Across all tasks, we observe more successful neonates born to mothers fed a DF diet. A greater rate of falls is observed in 8-day-old VF neonates, which is associated with delayed psychomotor development. Our findings suggest the potential benefits of lipids originating from a lactovegetarian diet compared with those originating from a vegan diet for the psychomotor development of neonates.
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Affiliation(s)
- Yohann Chaudron
- UMR CNRS MNHN 7179, 1 avenue du Petit Château, 91800, Brunoy, France.
| | - Constance Boyer
- Centre national interprofessionnel de l'économie laitière, 42 rue de Châteaudun, 75314, Paris cedex 09, France
| | - Corinne Marmonier
- Centre national interprofessionnel de l'économie laitière, 42 rue de Châteaudun, 75314, Paris cedex 09, France
| | - Mélanie Plourde
- Centre de Recherche sur le Vieillissement, CIUSSS de l'Estrie - CHUS, 1036 Belvédère sud, Sherbrooke, J1H 4C4, Canada
- Département de Médecine, Université de Sherbrooke, Sherbrooke, Canada
| | - Annick Vachon
- Centre de Recherche sur le Vieillissement, CIUSSS de l'Estrie - CHUS, 1036 Belvédère sud, Sherbrooke, J1H 4C4, Canada
| | - Bernadette Delplanque
- UMR 9197, Paris-Saclay Institute of Neurosciences (NeuroPSI), University of Paris-Saclay, CNRS, 151 route de la Rotonde, F-91400, Saclay, France
| | - Mohammed Taouis
- UMR 9197, Paris-Saclay Institute of Neurosciences (NeuroPSI), University of Paris-Saclay, CNRS, 151 route de la Rotonde, F-91400, Saclay, France
| | - Fabien Pifferi
- UMR CNRS MNHN 7179, 1 avenue du Petit Château, 91800, Brunoy, France.
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2
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Pausova Z, Sliz E. Large-Scale Population-Based Studies of Blood Metabolome and Brain Health. Curr Top Behav Neurosci 2024. [PMID: 38509405 DOI: 10.1007/7854_2024_463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Metabolomics technologies enable the quantification of multiple metabolomic measures simultaneously, which provides novel insights into molecular aspects of human health and disease. In large-scale, population-based studies, blood is often the preferred biospecimen. Circulating metabolome may relate to brain health either by affecting or reflecting brain metabolism. Peripheral metabolites may act at or cross the blood-brain barrier and, subsequently, influence brain metabolism, or they may reflect brain metabolism if similar pathways are engaged. Peripheral metabolites may also include those penetrating the circulation from the brain, indicating, for example, brain damage. Most brain health-related metabolomics studies have been conducted in the context of neurodegenerative disorders and cognition, but some studies have also focused on neuroimaging markers of these disorders. Moreover, several metabolomics studies of neurodevelopmental disorders have been performed. Here, we provide a brief background on the types of blood metabolites commonly assessed, and we review the literature describing the relationships between human blood metabolome (n > 50 metabolites) and brain health reported in large-scale studies (n > 500 individuals).
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Affiliation(s)
- Zdenka Pausova
- The Hospital for Sick Children, Toronto, ON, Canada
- Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Eeva Sliz
- Research Unit of Population Health, Faculty of Medicine, University of Oulu, Oulu, Finland.
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3
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Mercola J, D'Adamo CR. Linoleic Acid: A Narrative Review of the Effects of Increased Intake in the Standard American Diet and Associations with Chronic Disease. Nutrients 2023; 15:3129. [PMID: 37513547 PMCID: PMC10386285 DOI: 10.3390/nu15143129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/20/2023] [Accepted: 06/25/2023] [Indexed: 07/30/2023] Open
Abstract
The intake of linoleic acid (LA) has increased dramatically in the standard American diet. LA is generally promoted as supporting human health, but there exists controversy regarding whether the amount of LA currently consumed in the standard American diet supports human health. The goal of this narrative review is to explore the mechanisms that underlie the hypothesis that excessive LA intake may harm human health. While LA is considered to be an essential fatty acid and support health when consumed in modest amounts, an excessive intake of LA leads to the formation of oxidized linoleic acid metabolites (OXLAMs), impairments in mitochondrial function through suboptimal cardiolipin composition, and likely contributes to many chronic diseases that became an epidemic in the 20th century, and whose prevalence continues to increase. The standard American diet comprises 14 to 25 times more omega-6 fatty acids than omega-3 fatty acids, with the majority of omega-6 intake coming from LA. As LA consumption increases, the potential for OXLAM formation also increases. OXLAMs have been associated with various illnesses, including cardiovascular disease, cancer, and Alzheimer's disease, among others. Lowering dietary LA intake can help reduce the production and accumulation of OXLAMs implicated in chronic diseases. While there are other problematic components in the standard American diet, the half-life of LA is approximately two years, which means the damage can be far more persistent than other dietary factors, and the impact of reducing excessive LA intake takes time. Therefore, additional research-evaluating approaches to reduce OXLAM formation and cardiolipin derangements following LA consumption are warranted.
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Affiliation(s)
- Joseph Mercola
- Natural Health Partners, LLC, 125 SW 3rd Place, Cape Coral, FL 33991, USA
| | - Christopher R D'Adamo
- Department of Family and Community Medicine, Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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4
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Einerhand AWC, Mi W, Haandrikman A, Sheng XY, Calder PC. The Impact of Linoleic Acid on Infant Health in the Absence or Presence of DHA in Infant Formulas. Nutrients 2023; 15:2187. [PMID: 37432333 DOI: 10.3390/nu15092187] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 07/12/2023] Open
Abstract
Both linoleic acid (LA) and α-linolenic acid (ALA) are essential dietary fatty acids, and a balanced dietary supply of these is of the utmost importance for health. In many countries across the globe, the LA level and LA/ALA ratio in breast milk (BM) are high. For infant formula (IF), the maximum LA level set by authorities (e.g., Codex or China) is 1400 mg LA/100 kcal ≈ 28% of total fatty acid (FA) ≈ 12.6% of energy. The aims of this study are: (1) to provide an overview of polyunsaturated fatty acid (PUFA) levels in BM across the world, and (2) to determine the health impact of different LA levels and LA/ALA ratios in IF by reviewing the published literature in the context of the current regulatory framework. The lipid composition of BM from mothers living in 31 different countries was determined based on a literature review. This review also includes data from infant studies (intervention/cohort) on nutritional needs regarding LA and ALA, safety, and biological effects. The impact of various LA/ALA ratios in IF on DHA status was assessed within the context of the current worldwide regulatory framework including China and the EU. Country averages of LA and ALA in BM range from 8.5-26.9% FA and 0.3-2.65% FA, respectively. The average BM LA level across the world, including mainland China, is below the maximum 28% FA, and no toxicological or long-term safety data are available on LA levels > 28% FA. Although recommended IF LA/ALA ratios range from 5:1 to 15:1, ratios closer to 5:1 seem to promote a higher endogenous synthesis of DHA. However, even those infants fed IF with more optimal LA/ALA ratios do not reach the DHA levels observed in breastfed infants, and the levels of DHA present are not sufficient to have positive effects on vision. Current evidence suggests that there is no benefit to going beyond the maximum LA level of 28% FA in IF. To achieve the DHA levels found in BM, the addition of DHA to IF is necessary, which is in line with regulations in China and the EU. Virtually all intervention studies investigating LA levels and safety were conducted in Western countries in the absence of added DHA. Therefore, well-designed intervention trials in infants across the globe are required to obtain clarity about optimal and safe levels of LA and LA/ALA ratios in IF.
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Affiliation(s)
| | - Wiola Mi
- Bunge Loders Croklaan Nutrition, Shanghai 200051, China
| | | | - Xiao-Yang Sheng
- Department of Developmental Behavioral Pediatric & Children Healthcare, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200051, China
| | - Philip C Calder
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton SO16 6YD, UK
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5
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Seki D, Errerd T, Hall LJ. The role of human milk fats in shaping neonatal development and the early life gut microbiota. MICROBIOME RESEARCH REPORTS 2023; 2:8. [PMID: 38047278 PMCID: PMC10688791 DOI: 10.20517/mrr.2023.09] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 12/05/2023]
Abstract
Human breast milk (HBM) is the main source of nutrition for neonates across the critical early-life developmental period. The highest demand for energy is due to rapid neurophysiological expansion post-delivery, which is largely met by human milk lipids (HMLs). These HMLs also play a prebiotic role and potentially promote the growth of certain commensal bacteria, which, via HML digestion, supports the additional transfer of energy to the infant. In tandem, HMLs can also exert bactericidal effects against a variety of opportunistic pathogens, which contributes to overall colonisation resistance. Such interactions are pivotal for sustaining homeostatic relationships between microorganisms and their hosts. However, the underlying molecular mechanisms governing these interactions remain poorly understood. This review will explore the current research landscape with respect to HMLs, including compositional considerations and impact on the early life gut microbiota. Recent papers in this field will also be discussed, including a final perspective on current knowledge gaps and potential next research steps for these important but understudied breast milk components.
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Affiliation(s)
- David Seki
- Chair of Intestinal Microbiome, School of Life Sciences, ZIEL-Institute for Food & Health, Technical University of Munich, Freising 85354, Germany
| | - Theresa Errerd
- Chair of Intestinal Microbiome, School of Life Sciences, ZIEL-Institute for Food & Health, Technical University of Munich, Freising 85354, Germany
| | - Lindsay J Hall
- Chair of Intestinal Microbiome, School of Life Sciences, ZIEL-Institute for Food & Health, Technical University of Munich, Freising 85354, Germany
- Gut Microbes & Health, Quadram Institute Bioscience, Norwich Research Park, Norwich NR4 7UQ, UK
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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6
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Calvo-Lerma J, Selma-Royo M, Hervas D, Yang B, Intonen L, González S, Martínez-Costa C, Linderborg KM, Collado MC. Breast Milk Lipidome Is Associated With Maternal Diet and Infants' Growth. Front Nutr 2022; 9:854786. [PMID: 35873422 PMCID: PMC9296781 DOI: 10.3389/fnut.2022.854786] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
Objectives The fatty acid (FA) composition of breast milk is a relevant aspect related to the development of the lactating infant. The present study aimed at exploring correlations between dietary intake of macro- and micronutrients with the FA profile in breast milk, and the possible implication for infants' growth. Study Design Breast milk samples from a cohort of lactating women were collected 7–15 days postpartum. The FA profiles in triacylglycerol (TAG) and phospholipid (PL)-rich fractions were analyzed by gas chromatography. Diet was registered during the third trimester of pregnancy by means of a food frequency questionnaire (FFQ). In addition, anthropometric measurements of infants were collected from gestation and up to 12 months postpartum. Results The FA profile in breast milk was characterized by a median of 37.4, 41.3 and 16.8% of saturated, monounsaturated, and polyunsaturated FAs, respectively. From the dietary components, zinc, iron, and B group vitamins were correlated positively with the proportion of total n-3 FAs in TAG and C20:5 n-3 in PL. Lycopene, vitamin E, zinc, and vitamin B2 showed a similar correlation with total polyunsaturated fatty acid (PUFA), total n-6 FAs, C20:4 n-6, and C18:2 n-6 in TAG. Regarding food groups, nuts showed the strongest association with several PUFA both in TAG and PL, while the vegetable group was also positively associated with C18:3 n-3. Furthermore, the concentration of linolenic acid (C18:3 n-3) and palmitic acid (C16:0) were positively associated with increased length for age (LFA) and weight for age (WFA) at 12 months compared with birth [ΔLFA −0.16 (−0.85, 0.37); ΔWFA −0.26 (−0.77, 0.21)]. Conclusions Mothers' intake of nuts, dietary sources of zinc, iron, and B group vitamins were identified as potential predictors of a high-unsaturated FA profile in breast milk. In addition, linolenic and palmitic acids in breast milk were positively associated with infants' growth in the first year of life.
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Affiliation(s)
- Joaquim Calvo-Lerma
- Institute of Agrochemistry and Food Technology (IATA-CSIC), Valencia, Spain
- *Correspondence: Joaquim Calvo-Lerma
| | - Marta Selma-Royo
- Institute of Agrochemistry and Food Technology (IATA-CSIC), Valencia, Spain
| | - David Hervas
- Department of Applied Statistics and Operations Research, and Quality, Universitat Politècnica de València, Valencia, Spain
| | - Baoru Yang
- Department of Life Technologies, Food Sciences, University of Turku, Turku, Finland
| | - Linda Intonen
- Department of Life Technologies, Food Sciences, University of Turku, Turku, Finland
| | - Sonia González
- Department of Functional Biology, University of Oviedo, Oviedo, Spain
- Diet, Microbiota and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Cecilia Martínez-Costa
- Pediatric Gastroenterology and Nutrition Section, Hospital Clínico Universitario Valencia, INCLIVA Research Center, Valencia, Spain
| | - Kaisa M. Linderborg
- Department of Life Technologies, Food Sciences, University of Turku, Turku, Finland
| | - Maria Carmen Collado
- Institute of Agrochemistry and Food Technology (IATA-CSIC), Valencia, Spain
- Maria Carmen Collado
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7
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Abstract
Preterm infants are at higher risk of mortality and morbidity compared with those born at term. Nutrition-related morbidities include poor growth, immune deficiency, nutritional deficiencies, and adverse long-term neurodevelopment. In addition to macronutrients, many nutritional supplements have been used to enhance growth and development, and decrease infections. Nutrients can enhance preterm infants' immune status, optimize the microbiome, improve growth and development, and influence the risk of necrotizing enterocolitis, sepsis, and other outcomes.
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Affiliation(s)
- Mohan Pammi
- Section of Neonatology, Department of Pediatrics Baylor College of Medicine & Texas Children's Hospital Houston, TX 77030, USA.
| | - Ravi M. Patel
- Department of Pediatrics, Emory University, Atlanta, Georgia
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8
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Adverse effects of linoleic acid: Influence of lipid oxidation on lymphatic transport of citrus flavonoid and enterocyte morphology. Food Chem 2022; 369:130968. [PMID: 34479013 DOI: 10.1016/j.foodchem.2021.130968] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 07/29/2021] [Accepted: 08/24/2021] [Indexed: 01/30/2023]
Abstract
Lipids usually contain a large ratio of polyunsaturated fatty acids (PUFAs), which are highly susceptible to oxidation. Presence of oxidized lipids in foods may affect the bioavailability of lipophilic bioactive components after ingestion. In this study, the effect of oxidized and unoxidized linoleic acid (LA) on the transport of a highly lipophilic bioactive citrus flavonoid (5-hydroxy - 6, 7, 8, 4' tetramethoxylflavone or 5-DMT) was determined using a Caco-2 cell model. Results demonstrated that compared to free 5-DMT, unoxidized LA improved the trans-enterocyte absorption of 5-DMT by stimulating the production of lipid droplets and chylomicrons. Although the amount of 5-DMT transported across the enterocyte doubled by oxidized LA compared to free 5-DMT, it significantly induced reactive oxygen species (ROS), affected the function of tight junction and caused damages to the morphology of enterocyte monolayer. This study re-emphasized the importance of preventing lipid oxidation in foods.
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9
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Carlson SE, Schipper L, Brenna JT, Agostoni C, Calder PC, Forsyth S, Legrand P, Abrahamse-Berkeveld M, van de Heijning BJM, van der Beek EM, Koletzko BV, Muhlhausler B. Perspective: Moving Toward Desirable Linoleic Acid Content in Infant Formula. Adv Nutr 2021; 12:2085-2098. [PMID: 34265035 PMCID: PMC8634410 DOI: 10.1093/advances/nmab076] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 05/19/2021] [Accepted: 05/24/2021] [Indexed: 02/07/2023] Open
Abstract
Infant formula should provide the appropriate nutrients and adequate energy to facilitate healthy infant growth and development. If conclusive data on quantitative nutrient requirements are not available, the composition of human milk (HM) can provide some initial guidance on the infant formula composition. This paper provides a narrative review of the current knowledge, unresolved questions, and future research needs in the area of HM fatty acid (FA) composition, with a particular focus on exploring appropriate intake levels of the essential FA linoleic acid (LA) in infant formula. The paper highlights a clear gap in clinical evidence as to the impact of LA levels in HM or formula on infant outcomes, such as growth, development, and long-term health. The available preclinical information suggests potential disadvantages of high LA intake in the early postnatal period. We recommend performing well-designed clinical intervention trials to create clarity on optimal levels of LA to achieve positive impacts on both short-term growth and development and long-term functional health outcomes.
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Affiliation(s)
| | | | - J Thomas Brenna
- Department of Pediatrics, University of Texas at Austin, Austin, TX, USA,Division of Nutritional Sciences, Cornell University, Ithaca, NY, USA
| | - Carlo Agostoni
- Pediatric Area, Fondazione IRCCS Ca’Granda- Ospedale Maggiore Policlinico, Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy,Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Philip C Calder
- Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | | | - Philippe Legrand
- Laboratoire de Biochimie-Nutrition Humaine, Agrocampus–French National Institute of Health and Medical Research, Rennes, France
| | | | | | - Eline M van der Beek
- Danone Nutricia Research, Utrecht, The Netherlands,Department of Pediatrics, University Medical Center, Groningen, The Netherlands
| | - Berthold V Koletzko
- Ludwig-Maximilians-Universität Munich, Department of Paediatrics, Dr von Hauner Children's Hospital, University of Munich Medical Center, Munich, Germany
| | - Beverly Muhlhausler
- Nutrition and Health Program, Health and Biosecurity, CSIRO, Adelaide, Australia,School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia
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10
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Lakhssassi N, Lopes-Caitar VS, Knizia D, Cullen MA, Badad O, El Baze A, Zhou Z, Embaby MG, Meksem J, Lakhssassi A, Chen P, AbuGhazaleh A, Vuong TD, Nguyen HT, Hewezi T, Meksem K. TILLING-by-Sequencing + Reveals the Role of Novel Fatty Acid Desaturases (GmFAD2-2s) in Increasing Soybean Seed Oleic Acid Content. Cells 2021; 10:1245. [PMID: 34069320 PMCID: PMC8158723 DOI: 10.3390/cells10051245] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 11/17/2022] Open
Abstract
Soybean is the second largest source of oil worldwide. Developing soybean varieties with high levels of oleic acid is a primary goal of the soybean breeders and industry. Edible oils containing high level of oleic acid and low level of linoleic acid are considered with higher oxidative stability and can be used as a natural antioxidant in food stability. All developed high oleic acid soybeans carry two alleles; GmFAD2-1A and GmFAD2-1B. However, when planted in cold soil, a possible reduction in seed germination was reported when high seed oleic acid derived from GmFAD2-1 alleles were used. Besides the soybean fatty acid desaturase (GmFAD2-1) subfamily, the GmFAD2-2 subfamily is composed of five members, including GmFAD2-2A, GmFAD2-2B, GmFAD2-2C, GmFAD2-2D, and GmFAD2-2E. Segmental duplication of GmFAD2-1A/GmFAD2-1B, GmFAD2-2A/GmFAD2-2C, GmFAD2-2A/GmFAD2-2D, and GmFAD2-2D/GmFAD2-2C have occurred about 10.65, 27.04, 100.81, and 106.55 Mya, respectively. Using TILLING-by-Sequencing+ technology, we successfully identified 12, 8, 10, 9, and 19 EMS mutants at the GmFAD2-2A, GmFAD2-2B, GmFAD2-2C, GmFAD2-2D, and GmFAD2-2E genes, respectively. Functional analyses of newly identified mutants revealed unprecedented role of the five GmFAD2-2A, GmFAD2-2B, GmFAD2-2C, GmFAD2-2D, and GmFAD2-2E members in controlling the seed oleic acid content. Most importantly, unlike GmFAD2-1 members, subcellular localization revealed that members of the GmFAD2-2 subfamily showed a cytoplasmic localization, which may suggest the presence of an alternative fatty acid desaturase pathway in soybean for converting oleic acid content without substantially altering the traditional plastidial/ER fatty acid production.
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Affiliation(s)
- Naoufal Lakhssassi
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | | | - Dounya Knizia
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | - Mallory A. Cullen
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | - Oussama Badad
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | - Abdelhalim El Baze
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | - Zhou Zhou
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
| | - Mohamed G. Embaby
- Department of Animal Science, Food, and Nutrition, Southern Illinois University, Carbondale, IL 62901, USA; (M.G.E.); (A.A.)
| | - Jonas Meksem
- Trinity College of Arts and Sciences, Duke University, Durham, NC 27708, USA;
| | - Aicha Lakhssassi
- Faculty of Sciences and Technologies, University of Lorraine, 54506 Nancy, France;
| | - Pengyin Chen
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA; (P.C.); (T.D.V.); (H.T.N.)
| | - Amer AbuGhazaleh
- Department of Animal Science, Food, and Nutrition, Southern Illinois University, Carbondale, IL 62901, USA; (M.G.E.); (A.A.)
| | - Tri D. Vuong
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA; (P.C.); (T.D.V.); (H.T.N.)
| | - Henry T. Nguyen
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA; (P.C.); (T.D.V.); (H.T.N.)
| | - Tarek Hewezi
- Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA; (V.S.L.-C.); (T.H.)
| | - Khalid Meksem
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901, USA; (N.L.); (D.K.); (M.A.C.); (O.B.); (A.E.B.); (Z.Z.)
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11
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Messina M, Shearer G, Petersen K. Soybean oil lowers circulating cholesterol levels and coronary heart disease risk, and has no effect on markers of inflammation and oxidation. Nutrition 2021; 89:111343. [PMID: 34171740 DOI: 10.1016/j.nut.2021.111343] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/16/2021] [Accepted: 05/05/2021] [Indexed: 10/21/2022]
Abstract
To reduce risk of coronary heart disease, replacement of saturated fats (SFAs) with polyunsaturated fats (PUFA) is recommended. Strong and concordant evidence supports this recommendation, but controversy remains. Some observational studies have reported no association between SFAs and coronary heart disease, likely because of failure to account for the macronutrient replacing SFAs, which determines the direction and strength of the observed associations. Controversy also persists about whether ω-6 (nω-6) PUFA or a high dietary ratio of nω-6 to ω-3 (nω-3) fatty acids leads to proinflammatory and pro-oxidative states. These issues are relevant to soybean oil, which is the leading edible oil consumed globally and in the United States. Soybean oil accounts for over 40% of the US intake of both essential fatty acids. We reviewed clinical and epidemiologic literature to determine the effects of soybean oil on cholesterol levels, inflammation, and oxidation. Clinical evidence indicates that soybean oil does not affect inflammatory biomarkers, nor does it increase oxidative stress. On the other hand, it has been demonstrated that when dietary SFAs are replaced with soybean oil, blood cholesterol levels are lowered. Regarding the nω-6:nω-3 dietary ratio, health agencies have consistently rejected the importance of this ratio, instead emphasizing the importance of consuming sufficient amounts of each type of fat. Thus, several lines of evidence indicate that soybean oil can positively contribute to overall health and reduction of risk of coronary heart disease.
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Affiliation(s)
- Mark Messina
- Nutrition Matters, Inc., Pittsfield, Massachusetts, USA.
| | - Gregory Shearer
- Pennsylvania State University, University Park, Pennsylvania, USA
| | - Kristina Petersen
- Department of Nutritional Sciences, Texas Tech University, Lubbock, Texas, USA
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12
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Ávila-Gandía V, Torregrosa-García A, Luque-Rubia AJ, Abellán-Ruiz MS, Victoria-Montesinos D, López-Román FJ. Re-esterified DHA improves ventilatory threshold 2 in competitive amateur cyclists. J Int Soc Sports Nutr 2020; 17:51. [PMID: 33087145 PMCID: PMC7580004 DOI: 10.1186/s12970-020-00379-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 09/22/2020] [Indexed: 11/10/2022] Open
Abstract
Background Fish oils were studied as ergogenic aids in a number of mixed physical trial designs showing promising results. However, the heterogeneous purity of the studied supplements, combined with the variety of physical tests employed call for more studies to confirm these findings, ideally with standardised supplements. Our aim was to test a supplement highly concentrated in DHA (DHA:EPA ratio equal to approximately 8:1) on a maximal cycling test to elucidate performance improvements mainly due to DHA. Methods A double-blind, placebo controlled, randomised balanced, parallel design, in competitive amateur cyclists was employed. They were all male, older than 18 years old, with training routine of 2 to 4 sessions per week lasting at least one hour each. A ramp cycling test to exhaustion with a subsequent 5 min recovery phase was employed before and after treatment to analyse aerobic metabolism and lactate clearance after the bout. After 30 days of supplementation with 975 mg of re-esterified DHA, the thirty-eight cyclist who completed the study were finally included for statistical analysis. Results Mean power output at ventilatory threshold 2 (VT2) improved after DHA supplementation both as absolute (△DHA versus △PLA: 6.33–26.54 Watts; CI 95%) and relative (p=0.006) values, paralleled with higher oxygen consumption at VT2 both for absolute (DHA 2729.4 ±304.5, 3045.9 ±335.0; PLA 2792.3 ±339.5, 2845.5 ±357.1; ml·min−1 baseline versus post p=0.025) and relative values (DHA 36.6 ±5.0, 41.2 ±5.4; PLA 37.2 ±5.7, 38.1 ±5.2; ml·kg−1·min−1 baseline versus post p=0.024). Heart rate recovery rate improved during the recovery phase in the DHA group compared to PLA (p=0.005). Conclusion DHA is capable of improving mean power output at the ventilatory threshold 2 (anaerobic ventilatory threshold) in amateur competitive cyclists. It is unclear if these findings are the result of the specific DHA supplement blend or another factor.
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Affiliation(s)
- Vicente Ávila-Gandía
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain
| | - Antonio Torregrosa-García
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain.
| | - Antonio J Luque-Rubia
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain
| | - María Salud Abellán-Ruiz
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain
| | - Desirée Victoria-Montesinos
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain
| | - F Javier López-Román
- Sports Physiology department, San Antonio Catholic University of Murcia (UCAM), Avenida de los Jerónimos, 135, Guadalupe (Murcia), 30107, Spain.,Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, 30120, Spain
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13
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Sliz E, Shin J, Syme C, Black S, Seshadri S, Paus T, Pausova Z. Thickness of the cerebral cortex shows positive association with blood levels of triacylglycerols carrying 18-carbon fatty acids. Commun Biol 2020; 3:456. [PMID: 32820227 PMCID: PMC7441395 DOI: 10.1038/s42003-020-01189-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022] Open
Abstract
Perturbations in fatty acid (FA) metabolism as well as thinning of the cerebral cortex have been associated with cognitive decline in the elderly. Predominant FAs in the brain are docosahexaenoic acid (DHA) and arachidonic acid (ARA). Approximately 2-8% of esterified DHA and 3-5% of esterified ARA in the brain are replaced daily. DHA and ARA are derivatives of 18-carbon essential FAs, α-linolenic acid and linoleic acid, that must be imported into the brain from the circulation. In blood, FAs are primarily transported in triacylglycerols (TAGs) from which they can be released at the blood-brain-barrier and transported inside the brain. We show that circulating levels of TAGs carrying 18-carbon FAs are positively associated with cortical thickness in middle-aged adults. These associations are stronger in cortical regions with higher expression of genes regulating long-chain FA metabolism and cellular membranes, and cortical thickness in the same regions may be related to cognitive performance.
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Affiliation(s)
- Eeva Sliz
- The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Jean Shin
- The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Catriona Syme
- The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Sandra Black
- Department of Medicine (Neurology), University of Toronto, Toronto, ON, Canada.,Toronto Dementia Research Alliance, Toronto, ON, Canada.,Sunnybrook Research Institute, Toronto, ON, Canada.,Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Hurvitz Brain Sciences Program, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,LC Campbell Cognitive Neurology Research Unit, Toronto, ON, Canada
| | - Sudha Seshadri
- The Framingham Heart Study, Framingham, MA, USA.,Department of Neurology, Boston University School of Medicine, Boston, MA, USA
| | - Tomas Paus
- Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, ON, Canada.,Departments of Psychology and Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Zdenka Pausova
- The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada. .,Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, Canada.
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14
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Ghasemi Fard S, Loh SP, Turchini GM, Wang B, Elliott G, Sinclair AJ. Microencapsulated Tuna Oil Results in Higher Absorption of DHA in Toddlers. Nutrients 2020; 12:nu12010248. [PMID: 31963702 PMCID: PMC7019307 DOI: 10.3390/nu12010248] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/15/2020] [Accepted: 01/15/2020] [Indexed: 02/06/2023] Open
Abstract
Docosahexaenoic acid (DHA) is an essential component for brain and visual acuity development during foetal and early postnatal life. A newly released directive under the European Commission stipulates DHA as a mandatory ingredient in infant formula. This poses challenges to manufacturers in preserving the stability and bioavailability of DHA at levels akin to human breast milk. The aims of this study were (a) to investigate the bioavailability of microencapsulated omega-3 DHA formulations in healthy toddlers compared with high DHA fish oil for a one-month period and (b) to assess the effect of DHA supplementation on children’s sleep and cry patterns. Sixty toddlers were randomly allocated to four groups: 1. unfortified formula, 2. unfortified formula plus high DHA tuna oil, 3. fortified formula with dairy-based microencapsulated high DHA tuna oil powder, and 4. fortified formula with allergenic-free microencapsulated high DHA tuna oil powder. Bioavailability was assessed from both blood and faecal fatty acid levels. The results showed an enhanced bioavailability with significantly greater concentrations of blood DHA levels in formulas with microencapsulated powders. There were no significant effects of treatment on sleep and cry patterns. Application and delivery of microencapsulated DHA tuna oil powder in toddlers’ formula provided better bioavailability of the active DHA.
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Affiliation(s)
| | - Su Peng Loh
- Department of Nutrition & Dietetics, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, Serdang 43300, Selangor, Malaysia;
| | - Giovanni M. Turchini
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia;
| | - Bo Wang
- School of Behavioural and Health Science, Australian Catholic University, Sydney, NSW 2000, Australia;
| | - Glenn Elliott
- Nu-Mega Ingredients Pty Ltd., Brisbane, QLD 4000, Australia; (S.G.F.); (G.E.)
| | - Andrew J. Sinclair
- Department of Nutrition, Dietetics and Food, Monash University, Clayton, Melbourne, VIC 3168, Australia
- Correspondence: ; Tel.: +61-0414906341
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15
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Kim Y, Kim H, Kwon O. Dietary intake of n-3 and n-6 polyunsaturated fatty acids in Korean toddlers 12-24 months of age with comparison to the dietary recommendations. Nutr Res Pract 2019; 13:344-351. [PMID: 31388411 PMCID: PMC6669068 DOI: 10.4162/nrp.2019.13.4.344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/22/2019] [Accepted: 07/05/2019] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND/OBJECTIVES Adequate dietary fatty acid intake is important for toddlers between 12-24 months of age, as this is a period of dietary transition in conjunction with rapid growth and development; however, actual fatty acid intake during this period seldom has been explored. This study was conducted to assess the intake status of n-3 and n-6 polyunsaturated fatty acids by toddlers during the 12-24-month period using 2010-2015 Korea National Health and Nutrition Examination Survey data. SUBJECTS/METHODS Twenty-four-hour dietary recall data of 12-24-month-old toddlers (n = 544) was used to estimate the intakes of α-linolenic acid (ALA; 18:3n-3), eicosapentaenoic acid (EPA; 20:5n-3), docosahexaenoic acid (DHA; 22:6n-3), linoleic acid (LA; 18:2n-6), and arachidonic acid (AA; 20:4n-6), as well as the major dietary sources of each. The results were compared with the expected intake for exclusively breastfed infants in the first 6 months of life and available dietary recommendations. RESULTS Mean daily intakes of ALA, EPA, DHA, LA, and AA were 529.9, 22.4, 37.0, 3907.6, and 20.0 mg/day, respectively. Dietary intakes of these fatty acids fell below the expected intake for 0-5-month-old exclusively breastfed infants. In particular, DHA and AA intakes were 4 to 5 times lower. The dietary assessment indicated that the mean intake of essential fatty acids ALA and LA was below the European and the FAO/WHO dietary recommendations, particularly for DHA, which was approximately 30% and 14-16% lower, respectively. The key sources of the essential fatty acids, DHA, and AA were soy (28.2%), fish (97.3%), and animals (53.7%), respectively. CONCLUSIONS Considering the prevailing view of DHA and AA requirements on early brain development, there remains considerable room for improvement in their intakes in the diets of Korean toddlers. Further studies are warranted to explore how increasing dietary intakes of DHA and AA could benefit brain development during infancy and early childhood.
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Affiliation(s)
- Youjin Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Hyesook Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Oran Kwon
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
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16
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Lee H, Padhi E, Hasegawa Y, Larke J, Parenti M, Wang A, Hernell O, Lönnerdal B, Slupsky C. Compositional Dynamics of the Milk Fat Globule and Its Role in Infant Development. Front Pediatr 2018; 6:313. [PMID: 30460213 PMCID: PMC6232911 DOI: 10.3389/fped.2018.00313] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 10/02/2018] [Indexed: 12/17/2022] Open
Abstract
Human milk is uniquely optimized for the needs of the developing infant. Its composition is complex and dynamic, driven primarily by maternal genetics, and to a lesser extent by diet and environment. One important component that is gaining attention is the milk fat globule (MFG). The MFG is composed of a triglyceride-rich core surrounded by a tri-layer membrane, also known as the milk fat globule membrane (MFGM) that originates from mammary gland epithelia. The MFGM is enriched with glycerophospholipids, sphingolipids, cholesterol, and proteins, some of which are glycosylated, and are known to exert numerous biological roles. Mounting evidence suggests that the structure of the MFG and bioactive components of the MFGM may benefit the infant by aiding in the structural and functional maturation of the gut through the provision of essential nutrients and/or regulating various cellular events during infant growth and immune education. Further, antimicrobial peptides and surface carbohydrate moieties surrounding the MFG might have a pivotal role in shaping gut microbial populations, which in turn may promote protection against immune and inflammatory diseases early in life. This review seeks to: (1) understand the components of the MFG, as well as maternal factors including genetic and lifestyle factors that influence its characteristics; (2) examine the potential role of this milk component on the intestinal immune system; and (3) delineate the mechanistic roles of the MFG in infant intestinal maturation and establishment of the microbiota in the alimentary canal.
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Affiliation(s)
- Hanna Lee
- Department of Food Science and Technology, University of California, Davis, Davis, CA, United States
| | - Emily Padhi
- Department of Food Science and Technology, University of California, Davis, Davis, CA, United States
| | - Yu Hasegawa
- Department of Food Science and Technology, University of California, Davis, Davis, CA, United States
| | - Jules Larke
- Department of Nutrition, University of California, Davis, Davis, CA, United States
| | - Mariana Parenti
- Department of Nutrition, University of California, Davis, Davis, CA, United States
| | - Aidong Wang
- Department of Food Science and Technology, University of California, Davis, Davis, CA, United States
| | - Olle Hernell
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
| | - Bo Lönnerdal
- Department of Nutrition, University of California, Davis, Davis, CA, United States
| | - Carolyn Slupsky
- Department of Food Science and Technology, University of California, Davis, Davis, CA, United States
- Department of Nutrition, University of California, Davis, Davis, CA, United States
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17
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Strandjord SE, Lands B, Hibbeln JR. Validation of an equation predicting highly unsaturated fatty acid (HUFA) compositions of human blood fractions from dietary intakes of both HUFAs and their precursors. Prostaglandins Leukot Essent Fatty Acids 2018; 136:171-176. [PMID: 28390839 PMCID: PMC5591053 DOI: 10.1016/j.plefa.2017.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 02/10/2017] [Accepted: 03/06/2017] [Indexed: 10/20/2022]
Abstract
Proportions of omega-3 (n-3) and omega-6 (n-6) in 20- and 22-carbon highly unsaturated fatty acids with 3 or more double bonds (HUFA) accumulated in tissue HUFA (e.g., the %n-6 in HUFA) are biomarkers reflecting intakes of n-6 and n-3 fatty acids. An empirical equation, referred to here as the Lands' Equation, was developed previously to use dietary intakes of n-6 and n-3 HUFA and their 18-carbon precursors to estimate the %n-6 in HUFA of humans. From the PubMed database, we identified clinical trials reporting (a) dietary intake of at least linoleic acid (18:2n-6) and alpha-linolenic acid (18:3n-3), and (b) the amounts of at least arachidonic acid (20:4n-6), eicosapentaenoic acid (20:5n-3), and docosahexaenoic acid (22:6n-3) in lipids of plasma, serum, or red blood cell. Linear regression analyses comparing reported and predicted %n-6 in HUFA gave a correlation coefficient of 0.73 (p<0.000000) for 34 studies with 92 subject groups. These results indicate that circulating HUFA compositions can be reliably estimated from dietary intake data that not only includes n-3 and n-6 HUFA consumption, but also includes consumption of 18 carbon n-3 and n-6 precursor fatty acids.
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Affiliation(s)
| | | | - Joseph R Hibbeln
- Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 5625 Fishers Lane, Rm 3N-07, MSC 9410, Bethesda, MD 20892-2088, USA.
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18
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Almazrooy AH, Alturki AM, Aljohani AM, Alraddadi A, Allogmani AM. Comparison of the Nutritional Values of Infant Formulas Available in Saudi Arabia. Glob Pediatr Health 2017; 4:2333794X17731037. [PMID: 28913374 PMCID: PMC5590693 DOI: 10.1177/2333794x17731037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 08/08/2017] [Indexed: 11/24/2022] Open
Abstract
Introduction. Optimum growth and development are best achieved by breastfeeding, which is the safest source for infant feeding. Mothers in Saudi Arabia start to breastfeed their infants but soon introduce formula brands. Objective. To assess the safety and nutritional adequacy of the oldest formula brands available in the Saudi market. Methods. An observational study has compared between 5 types of infant formula brands; they were chosen based on their international popularity. Also, they are considered as the oldest formula brands available in the Saudi market. The contents of all the included formulas were carefully collected from their containers. The collected data were compared with the global standard requirements for infant formulas according to the guidelines. Results. All the infant formula brands had their contents within the optimal range as stated by the ESPGHAN (European Society for Paediatric Gastroenterology, Hepatology and Nutrition) guidelines. Some formulas did not provide elements like fluoride and nucleotides. Moreover, the mandatory elements and the most dominant ingredient in each formula were documented. Discussion. According to the results of our study, all included formula brands are considered safe and nutritionally adequate. By assuming that the elements that were not found in some brands meant an abnormal value, Bebelac and Liptomil are the most suitable infant formulas available in the Saudi market. Conclusions. Adequate nutrition during infancy is essential in each health organization. The nutritional status of infants should be studied to achieve lifelong health and well-being. All formula brands in this study were found to be safe and nutritionally adequate.
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19
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Jasani B, Simmer K, Patole SK, Rao SC. Long chain polyunsaturated fatty acid supplementation in infants born at term. Cochrane Database Syst Rev 2017; 3:CD000376. [PMID: 28281303 PMCID: PMC6464574 DOI: 10.1002/14651858.cd000376.pub4] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND The long chain polyunsaturated fatty acids (LCPUFA) docosahexaenoic acid (DHA) and arachidonic acid (AA) are considered essential for maturation of the developing brain, retina and other organs in newborn infants. Standard infant milk formulae are not supplemented with LCPUFA; they contain only alpha-linolenic acid and linoleic acid, from which formula-fed infants must synthesise their own DHA and AA, respectively. Over the past few years, some manufacturers have added LCPUFA to formula milk and have marketed these products as providing an advantage for the overall development of full-term infants. OBJECTIVES To assess whether supplementation of formula milk with LCPUFA is both safe and beneficial for full-term infants, while focusing on effects on visual function, neurodevelopment and physical growth. SEARCH METHODS Two review authors independently searched the Cochrane Central Register of Controlled Trials (CENTRAL; December 2016), MEDLINE (Ovid, 1966 to December 2016), Embase (Ovid, 1980 to December 2016), the Cumulative Index to Nursing and Allied Health Literature (CINAHL; 1980 to December 2016) and abstracts of the Pediatric Academic Societies (2000 to 2016). We applied no language restrictions. SELECTION CRITERIA We reviewed all randomised controlled trials (RCTs) evaluating effects of LCPUFA supplemented versus non-supplemented formula milk on visual function, neurodevelopment and physical growth. We did not include trials reporting only biochemical outcomes. DATA COLLECTION AND ANALYSIS Two review authors extracted data independently. We assessed risk of bias of included studies using the guidelines of the Cochrane Neonatal Review Group. When appropriate, we conducted meta-analysis to determine a pooled estimate of effect. MAIN RESULTS We identified 31 RCTs and included 15 of these in the review (N = 1889).Nine studies assessed visual acuity, six of which used visual evoked potentials (VEP), two Teller cards and one both. Four studies reported beneficial effects, and the remaining five did not. Meta-analysis of three RCTs showed significant benefit for sweep VEP acuity at 12 months (log of the minimum angle of resolution (logMAR)) (mean difference (MD) -0.15, 95% confidence interval (CI) -0.17 to -0.13; I2 = 0; three trials; N = 244), but meta-analysis of three other RCTs showed no benefit for visual acuity measured with Teller cards at 12 months (cycles/degree) (MD -0.01, 95% CI -0.12 to 0.11; I2 = 0; three trials; N = 256). GRADE analysis for the outcome of visual acuity indicated that the overall quality of evidence was low.Eleven studies measured neurodevelopmental outcomes at or before two years. Nine studies used Bayley Scales of Infant Development, version II (BSID-II), and only two of these studies reported beneficial effects. Meta-analysis revealed no significant differences between LCPUFA and placebo groups in BSID Mental Developmental Index (MDI) scores at 18 months (MD 0.06, 95% CI -2.01 to 2.14; I2 = 75%; four trials; N = 661) and no significant differences in BSID Psychomotor Development Index (PDI) scores at 18 months (MD 0.69, 95% CI -0.78 to 2.16; I2 = 61%; four trials; N = 661). Results showed no significant differences between the two groups in BSID-II scores at one year and two years of age. One study reported better novelty preference measured by the Fagan Infant Test at nine months. Another study reported better problem solving at 10 months. One study used the Brunet and Lezine test to assess the developmental quotient and found no beneficial effects. Follow-up of some infants in different studies at three, six and nine years of age revealed no beneficial effects of supplementation. GRADE analysis of these outcomes indicated that the overall quality of evidence was low.Thirteen studies measured physical growth; none found beneficial or harmful effects of supplementation. Meta-analysis of five RCTs showed that the supplemented group had lower weight (z scores) at one year of age (MD -0.23, 95% CI -0.40 to -0.06; I2 = 83%; N = 521) and that the two groups showed no significant differences with respect to length and head circumference (z scores). Meta-analysis at 18 months and at two years revealed no significant differences between the two groups with respect to weight (kg), length (cm) and head circumference (cm). GRADE analysis of these outcomes indicated that the overall quality of evidence was low. AUTHORS' CONCLUSIONS Most of the included RCTs reported no beneficial effects or harms of LCPUFA supplementation on neurodevelopmental outcomes of formula-fed full-term infants and no consistent beneficial effects on visual acuity. Routine supplementation of full-term infant milk formula with LCPUFA cannot be recommended at this time.
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Affiliation(s)
- Bonny Jasani
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for ChildrenSubiacoWAAustralia
| | - Karen Simmer
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for ChildrenNeonatal Care UnitBagot RoadSubiacoWAAustralia6008
| | - Sanjay K Patole
- King Edward Memorial HospitalSchool of Paediatrics and Child Health, School of Women's and Infants' Health, University of Western Australia374 Bagot RdSubiacoPerthWestern AustraliaAustralia6008
| | - Shripada C Rao
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for ChildrenCentre for Neonatal Research and EducationPerth, Western AustraliaAustralia6008
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Lakhssassi N, Zhou Z, Liu S, Colantonio V, AbuGhazaleh A, Meksem K. Characterization of the FAD2 Gene Family in Soybean Reveals the Limitations of Gel-Based TILLING in Genes with High Copy Number. FRONTIERS IN PLANT SCIENCE 2017; 8:324. [PMID: 28348573 PMCID: PMC5346563 DOI: 10.3389/fpls.2017.00324] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 02/23/2017] [Indexed: 05/21/2023]
Abstract
Soybean seed oil typically contains 18-20% oleic acid. Increasing the content of oleic acid is beneficial for health and biodiesel production. Mutations in FAD2-1 genes have been reported to increase seed oleic acid content. A subset of 1,037 mutant families from a mutagenized soybean cultivar (cv.) Forrest population was screened using reverse genetics (TILLING) to identify mutations within FAD2 genes. Although no fad2 mutants were identified using gel-based TILLING, four fad2-1A and one fad2-1B mutants were identified to have high seed oleic acid content using forward genetic screening and subsequent target sequencing. TILLING has been successfully used as a non-transgenic reverse genetic approach to identify mutations in genes controlling important agronomic traits. However, this technique presents limitations in traits such as oil composition due to gene copy number and similarities within the soybean genome. In soybean, FAD2 are present as two copies, FAD2-1 and FAD2-2. Two FAD2-1 members: FAD2-1A and FAD2-1B; and three FAD2-2 members: FAD2-2A, FAD2-2B, and FAD2-2C have been reported. Syntenic, phylogenetic, and in silico analysis revealed two additional members constituting the FAD2 gene family: GmFAD2-2D and GmFAD2-2E, located on chromosomes 09 and 15, respectively. They are presumed to have diverged from other FAD2-2 members localized on chromosomes 19 (GmFAD2-2A and GmFAD2-2B) and 03 (GmFAD2-2C). This work discusses alternative solutions to the limitations of gel-based TILLING in functional genomics due to high copy number and multiple paralogs of the FAD2 gene family in soybean.
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Affiliation(s)
- Naoufal Lakhssassi
- Department of Plant, Soil and Agricultural Systems, Southern Illinois UniversityCarbondale, IL, USA
| | - Zhou Zhou
- Department of Plant, Soil and Agricultural Systems, Southern Illinois UniversityCarbondale, IL, USA
| | - Shiming Liu
- Department of Plant, Soil and Agricultural Systems, Southern Illinois UniversityCarbondale, IL, USA
| | - Vincent Colantonio
- Department of Plant, Soil and Agricultural Systems, Southern Illinois UniversityCarbondale, IL, USA
| | - Amer AbuGhazaleh
- Department of Animal Science, Food and Nutrition, Southern Illinois UniversityCarbondale, IL, USA
| | - Khalid Meksem
- Department of Plant, Soil and Agricultural Systems, Southern Illinois UniversityCarbondale, IL, USA
- *Correspondence: Khalid Meksem
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21
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Moon K, Rao SC, Schulzke SM, Patole SK, Simmer K. Longchain polyunsaturated fatty acid supplementation in preterm infants. Cochrane Database Syst Rev 2016; 12:CD000375. [PMID: 27995607 PMCID: PMC6463838 DOI: 10.1002/14651858.cd000375.pub5] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Controversy exists over whether longchain polyunsaturated fatty acids (LCPUFA) are essential nutrients for preterm infants because they may not be able to synthesise sufficient amounts of LCPUFA to meet the needs of the developing brain and retina. OBJECTIVES To assess whether supplementation of formula milk with LCPUFA is safe and of benefit to preterm infants. The main areas of interest were the effects of supplementation on the visual function, development and growth of preterm infants. SEARCH METHODS Trials were identified by searching the Cochrane Central Register of Controlled Trials (CENTRAL; 2016, Issue 2) in the Cochrane Library (searched 28 February 2016), MEDLINE Ovid (1966 to 28 February 2016), Embase Ovid (1980 to 28 February 2016), CINAHL EBSCO (Cumulative Index to Nursing and Allied Health Literature; 1980 to 28 February 2016), MEDLINE In Process & Other Non-indexed Citations (1966 to 28 February 2016) and by checking reference lists of articles and conference proceedings. We also searched ClinicalTrials.gov (13 April 2016). No language restrictions were applied. SELECTION CRITERIA All randomised trials evaluating the effect of LCPUFA-supplemented formula in enterally-fed preterm infants (compared with standard formula) on visual development, neurodevelopment and physical growth. Trials reporting only biochemical outcomes were not included. DATA COLLECTION AND ANALYSIS All authors assessed eligibility and trial quality, two authors extracted data separately. Study authors were contacted for additional information. MAIN RESULTS Seventeen trials involving 2260 preterm infants were included in the review. The risk of bias varied across the included trials with 10 studies having low risk of bias in a majority of the domains. The median gestational age (GA) in the included trials was 30 weeks and median birth weight (BW) was 1300 g. The median concentration of docosahexaenoic acid (DHA) was 0.33% (range: 0.15% to 1%) and arachidonic acid (AA) 0.37% (range: 0.02% to 0.84%). Visual acuity Visual acuity over the first year was measured by Teller or Lea acuity cards in eight studies, by visual evoked potential (VEP) in six studies and by electroretinogram (ERG) in two studies. Most studies found no significant differences in visual acuity between supplemented and control infants. The form of data presentation and the varying assessment methods precluded the use of meta-analysis. A GRADE analysis for this outcome indicated that the overall quality of evidence was low. Neurodevelopment Three out of seven studies reported some benefit of LCPUFA on neurodevelopment at different postnatal ages. Meta-analysis of four studies evaluating Bayley Scales of Infant Development at 12 months (N = 364) showed no significant effect of supplementation (Mental Development Index (MDI): MD 0.96, 95% CI -1.42 to 3.34; P = 0.43; I² = 71% - Psychomotor DeveIopment Index (PDI): MD 0.23, 95% CI -2.77 to 3.22; P = 0.88; I² = 81%). Furthermore, three studies at 18 months (N = 494) also revealed no significant effect of LCPUFA on neurodevelopment (MDI: MD 2.40, 95% CI -0.33 to 5.12; P = 0.08; I² = 0% - PDI: MD 0.74, 95% CI -1.90 to 3.37; P = 0.58; I² = 54%). A GRADE analysis for these outcomes indicated that the overall quality of evidence was low. Physical growth Four out of 15 studies reported benefits of LCPUFA on growth of supplemented infants at different postmenstrual ages (PMAs), whereas two trials suggested that LCPUFA-supplemented infants grow less well. One trial reported mild reductions in length and weight z scores at 18 months. Meta-analysis of five studies (N = 297) showed increased weight and length at two months post-term in supplemented infants (Weight: MD 0.21, 95% CI 0.08 to 0.33; P = 0.0010; I² = 69% - Length: MD 0.47, 95% CI 0.00 to 0.94; P = 0.05; I² = 0%). Meta-analysis of four studies at a corrected age of 12 months (N = 271) showed no significant effect of supplementation on growth outcomes (Weight: MD -0.10, 95% CI -0.31 to 0.12; P = 0.34; I² = 65% - Length: MD 0.25; 95% CI -0.33 to 0.84; P = 0.40; I² = 71% - Head circumference: MD -0.15, 95% CI -0.53 to 0.23; P = 0.45; I² = 0%). No significant effect of LCPUFA on weight, length or head circumference was observed on meta-analysis of two studies (n = 396 infants) at 18 months (Weight: MD -0.14, 95% CI -0.39 to 0.10; P = 0.26; I² = 66% - Length: MD -0.28, 95% CI -0.91 to 0.35; P = 0.38; I² = 90% - Head circumference: MD -0.18, 95% CI -0.53 to 0.18; P = 0.32; I² = 0%). A GRADE analysis for this outcome indicated that the overall quality of evidence was low. AUTHORS' CONCLUSIONS Infants enrolled in the trials were relatively mature and healthy preterm infants. Assessment schedule and methodology, dose and source of supplementation and fatty acid composition of the control formula varied between trials. On pooling of results, no clear long-term benefits or harms were demonstrated for preterm infants receiving LCPUFA-supplemented formula.
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Affiliation(s)
- Kwi Moon
- Princess Margaret Hospital for ChildrenPerthAustralia
| | - Shripada C Rao
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for ChildrenCentre for Neonatal Research and EducationPerth, Western AustraliaAustralia6008
| | - Sven M Schulzke
- University of Basel Children's Hospital (UKBB)Department of NeonatologySpitalstrasse 21BaselSwitzerland4031
| | - Sanjay K Patole
- King Edward Memorial HospitalSchool of Paediatrics and Child Health, School of Women's and Infants' Health, University of Western Australia374 Bagot RdSubiacoPerthWestern AustraliaAustralia6008
| | - Karen Simmer
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for ChildrenNeonatal Care UnitBagot RoadSubiacoWAAustralia6008
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Schindler T, Sinn JKH, Osborn DA. Polyunsaturated fatty acid supplementation in infancy for the prevention of allergy. Cochrane Database Syst Rev 2016; 10:CD010112. [PMID: 27788565 PMCID: PMC6464137 DOI: 10.1002/14651858.cd010112.pub2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Early dietary intakes may influence the development of allergic disease. It is important to determine if dietary polyunsaturated fatty acids (PUFAs) given as supplements or added to infant formula prevent the development of allergy. OBJECTIVES To determine the effect of higher PUFA intake during infancy to prevent allergic disease. SEARCH METHODS We used the standard search strategy of the Cochrane Neonatal Review group to search the Cochrane Central Register of Controlled Trials (CENTRAL 2015, Issue 9), MEDLINE (1966 to 14 September 2015), EMBASE (1980 to 14 September 2015) and CINAHL (1982 to 14 September 2015). We also searched clinical trials databases, conference proceedings, and the reference lists of retrieved articles for randomised controlled trials and quasi-randomised trials. SELECTION CRITERIA Randomised and quasi-randomised controlled trials that compared the use of a PUFA with no PUFA in infants for the prevention of allergy. DATA COLLECTION AND ANALYSIS Two review authors independently selected trials, assessed trial quality and extracted data from the included studies. We used fixed-effect analyses. The treatment effects were expressed as risk ratio (RR) with 95% confidence intervals (CI). We used the GRADE approach to assess the quality of evidence. MAIN RESULTS The search found 17 studies that assessed the effect of higher versus lower intake of PUFAs on allergic outcomes in infants. Only nine studies enrolling 2704 infants reported allergy outcomes that could be used in meta-analyses. Of these, there were methodological concerns for eight.In infants up to two years of age, meta-analyses found no difference in incidence of all allergy (1 study, 323 infants; RR 0.96, 95% CI 0.73 to 1.26; risk difference (RD) -0.02, 95% CI -0.12 to 0.09; heterogeneity not applicable), asthma (3 studies, 1162 infants; RR 1.04, 95% CI 0.80 to 1.35, I2 = 0%; RD 0.01, 95% CI -0.04 to 0.05, I2 = 0%), dermatitis/eczema (7 studies, 1906 infants; RR 0.93, 95% CI 0.82 to 1.06, I2 = 0%; RD -0.02, 95% CI -0.06 to 0.02, I2 = 0%) or food allergy (3 studies, 915 infants; RR 0.81, 95% CI 0.56 to 1.19, I2 = 63%; RD -0.02, 95% CI -0.06 to 0.02, I2 = 74%). There was a reduction in allergic rhinitis (2 studies, 594 infants; RR 0.47, 95% CI 0.23 to 0.96, I2 = 6%; RD -0.04, 95% CI -0.08 to -0.00, I2 = 54%; number needed to treat for an additional beneficial outcome (NNTB) 25, 95% CI 13 to ∞).In children aged two to five years, meta-analysis found no difference in incidence of all allergic disease (2 studies, 154 infants; RR 0.69, 95% CI 0.47 to 1.02, I2 = 43%; RD -0.16, 95% CI -0.31 to -0.00, I2 = 63%; NNTB 6, 95% CI 3 to ∞), asthma (1 study, 89 infants; RR 0.45, 95% CI 0.20 to 1.02; RD -0.20, 95% CI -0.37 to -0.02; heterogeneity not applicable; NNTB 5, 95% CI 3 to 50), dermatitis/eczema (2 studies, 154 infants; RR 0.65, 95% CI 0.34 to 1.24, I2 = 0%; RD -0.09 95% CI -0.22 to 0.04, I2 = 24%) or food allergy (1 study, 65 infants; RR 2.27, 95% CI 0.25 to 20.68; RD 0.05, 95% CI -0.07 to 0.16; heterogeneity not applicable).In children aged two to five years, meta-analysis found no difference in prevalence of all allergic disease (2 studies, 633 infants; RR 0.98, 95% CI 0.81 to 1.19, I2 = 36%; RD -0.01, 95% CI -0.08 to 0.07, I2 = 0%), asthma (2 studies, 635 infants; RR 1.12, 95% CI 0.82 to 1.53, I2 = 0%; RD 0.02, 95% CI -0.04 to 0.09, I2 = 0%), dermatitis/eczema (2 studies, 635 infants; RR 0.81, 95% CI 0.59 to 1.09, I2 = 0%; RD -0.04 95% CI -0.11 to 0.02, I2 = 0%), allergic rhinitis (2 studies, 635 infants; RR 1.02, 95% CI 0.83 to 1.25, I2 = 0%; RD 0.01, 95% CI -0.06 to 0.08, I2 = 0%) or food allergy (1 study, 119 infants; RR 0.27, 95% CI 0.06 to 1.19; RD -0.10, 95% CI -0.20 to -0.00; heterogeneity not applicable; NNTB 10, 95% CI 5 to ∞). AUTHORS' CONCLUSIONS There is no evidence that PUFA supplementation in infancy has an effect on infant or childhood allergy, asthma, dermatitis/eczema or food allergy. However, the quality of evidence was very low. There was insufficient evidence to determine an effect on allergic rhinitis.
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Affiliation(s)
- Tim Schindler
- Royal Hospital for WomenDepartment of Newborn CareBarker StreetRandwickNSWAustralia2031
| | - John KH Sinn
- Royal North Shore Hospital, The University of SydneyDepartment of NeonatologySt. Leonard'sSydneyNew South WalesAustralia2065
| | - David A Osborn
- University of SydneyCentral Clinical School, Discipline of Obstetrics, Gynaecology and NeonatologySydneyNSWAustralia2050
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Baker EJ, Miles EA, Burdge GC, Yaqoob P, Calder PC. Metabolism and functional effects of plant-derived omega-3 fatty acids in humans. Prog Lipid Res 2016; 64:30-56. [DOI: 10.1016/j.plipres.2016.07.002] [Citation(s) in RCA: 224] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 12/17/2022]
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Omega-3 polyunsaturated fatty acid supplementation during the pre and post-natal period: A meta-analysis and systematic review of randomized and semi-randomized controlled trials. JOURNAL OF NUTRITION & INTERMEDIARY METABOLISM 2016. [DOI: 10.1016/j.jnim.2016.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Astrup A, Rice Bradley BH, Brenna JT, Delplanque B, Ferry M, Torres-Gonzalez M. Regular-Fat Dairy and Human Health: A Synopsis of Symposia Presented in Europe and North America (2014-2015). Nutrients 2016; 8:nu8080463. [PMID: 27483308 PMCID: PMC4997376 DOI: 10.3390/nu8080463] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/22/2016] [Accepted: 07/26/2016] [Indexed: 02/07/2023] Open
Abstract
In recent history, some dietary recommendations have treated dairy fat as an unnecessary source of calories and saturated fat in the human diet. These assumptions, however, have recently been brought into question by current research on regular fat dairy products and human health. In an effort to disseminate, explore and discuss the state of the science on the relationship between regular fat dairy products and health, symposia were programmed by dairy industry organizations in Europe and North America at The Eurofed Lipids Congress (2014) in France, The Dairy Nutrition Annual Symposium (2014) in Canada, The American Society for Nutrition Annual Meeting held in conjunction with Experimental Biology (2015) in the United States, and The Federation of European Nutrition Societies (2015) in Germany. This synopsis of these symposia describes the complexity of dairy fat and the effects regular-fat dairy foods have on human health. The emerging scientific evidence indicates that the consumption of regular fat dairy foods is not associated with an increased risk of cardiovascular disease and inversely associated with weight gain and the risk of obesity. Dairy foods, including regular-fat milk, cheese and yogurt, can be important components of an overall healthy dietary pattern. Systematic examination of the effects of dietary patterns that include regular-fat milk, cheese and yogurt on human health is warranted.
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Affiliation(s)
- Arne Astrup
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Frederiksberg C DK-1958, Denmark.
| | | | - J Thomas Brenna
- Division of Nutritional Sciences, Cornell University, Savage Hall, Ithaca, NY 14853, USA.
| | - Bernadette Delplanque
- Institut des Neurosciences Paris-Saclay (Neuro-PSI), Universite Paris-Sud, Bat 447, Orsay 91405, France.
| | - Monique Ferry
- Sorbonne Paris-Cité, 190 Avenue de France, Paris 75013, France.
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Brenna JT. Long-chain polyunsaturated fatty acids and the preterm infant: a case study in developmentally sensitive nutrient needs in the United States. Am J Clin Nutr 2016; 103:606S-15S. [PMID: 26791188 PMCID: PMC4733252 DOI: 10.3945/ajcn.114.103994] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The vast majority of infant formulas in the United States contain the long-chain polyunsaturated fatty acids (PUFAs) docosahexaenoic acid (22:6n-3) and arachidonic acid (20:4n-6), which were first permitted by the US Food and Drug Administration in 2001. As a scientific case study, preclinical animal studies of these nutrients definitively influenced the design and interpretation of human clinical studies. Early studies were tied to the availability of test substances, and in hindsight suggest re-evaluation of the essential fatty acid concept in light of the totality of available evidence. Research in the 1950s established the essentiality of n-6 PUFAs for skin integrity; however, widespread recognition of the essentiality of n-3 PUFAs came decades later despite compelling evidence of their significance. Barriers to an understanding of the essentiality of n-3 PUFAs were as follows: 1) their role is in neural function, which is measured only with difficulty compared with skin lesions and growth faltering that are apparent for n-6 PUFAs; 2) the experimental use of vegetable oils as PUFA sources that contain the inefficiently used C18 PUFAs rather than the operative C20 and C22 PUFAs; 3) the shift from reliance on high-quality animal studies to define mechanisms that established the required nutrients in the first part of the 20th century to inherently challenging human studies. Advances in nutrition of premature infants require the best practices and opinions available, taking into account the totality of preclinical and clinical evidence.
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MESH Headings
- Animals
- Child Development
- Congresses as Topic
- Evidence-Based Medicine
- Fatty Acids, Essential/deficiency
- Fatty Acids, Essential/metabolism
- Fatty Acids, Essential/therapeutic use
- Fatty Acids, Omega-3/administration & dosage
- Fatty Acids, Omega-3/metabolism
- Fatty Acids, Omega-3/therapeutic use
- Fatty Acids, Omega-6/administration & dosage
- Fatty Acids, Omega-6/metabolism
- Fatty Acids, Omega-6/therapeutic use
- Humans
- Infant Formula/chemistry
- Infant Formula/standards
- Infant Nutritional Physiological Phenomena
- Infant, Newborn
- Neurogenesis
- Nutritional Requirements
- Practice Guidelines as Topic
- Premature Birth/diet therapy
- United States
- United States Food and Drug Administration
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Affiliation(s)
- J Thomas Brenna
- Division of Nutritional Sciences, Cornell University, Ithaca, NY
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27
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Fatty acid supply with complementary foods and LC-PUFA status in healthy infants: results of a randomised controlled trial. Eur J Nutr 2015; 55:1633-44. [DOI: 10.1007/s00394-015-0982-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 06/29/2015] [Indexed: 12/20/2022]
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Jones KDJ, Ali R, Khasira MA, Odera D, West AL, Koster G, Akomo P, Talbert AWA, Goss VM, Ngari M, Thitiri J, Ndoro S, Knight MAG, Omollo K, Ndungu A, Mulongo MM, Bahwere P, Fegan G, Warner JO, Postle AD, Collins S, Calder PC, Berkley JA. Ready-to-use therapeutic food with elevated n-3 polyunsaturated fatty acid content, with or without fish oil, to treat severe acute malnutrition: a randomized controlled trial. BMC Med 2015; 13:93. [PMID: 25902844 PMCID: PMC4407555 DOI: 10.1186/s12916-015-0315-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 03/09/2015] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Ready-to-use therapeutic foods (RUTF) are lipid-based pastes widely used in the treatment of acute malnutrition. Current specifications for RUTF permit a high n-6 polyunsaturated fatty acid (PUFA) content and low n-3 PUFA, with no stipulated requirements for preformed long-chain n-3 PUFA. The objective of this study was to develop an RUTF with elevated short-chain n-3 PUFA and measure its impact, with and without fish oil supplementation, on children's PUFA status during treatment of severe acute malnutrition. METHODS This randomized controlled trial in children with severe acute malnutrition in rural Kenya included 60 children aged 6 to 50 months who were randomized to receive i) RUTF with standard composition; ii) RUTF with elevated short chain n-3 PUFA; or iii) RUTF with elevated short chain n-3 PUFA plus fish oil capsules. Participants were followed-up for 3 months. The primary outcome was erythrocyte PUFA composition. RESULTS Erythrocyte docosahexaenoic acid (DHA) content declined from baseline in the two arms not receiving fish oil. Erythrocyte long-chain n-3 PUFA content following treatment was significantly higher for participants in the arm receiving fish oil than for those in the arms receiving RUTF with elevated short chain n-3 PUFA or standard RUTF alone: 3 months after enrollment, DHA content was 6.3% (interquartile range 6.0-7.3), 4.5% (3.9-4.9), and 3.9% (2.4-5.7) of total erythrocyte fatty acids (P <0.001), respectively, while eicosapentaenoic acid (EPA) content was 2.0% (1.5-2.6), 0.7% (0.6-0.8), and 0.4% (0.3-0.5) (P <0.001). RUTF with elevated short chain n-3 PUFA and fish oil capsules were acceptable to participants and carers, and there were no significant differences in safety outcomes. CONCLUSIONS PUFA requirements of children with SAM are not met by current formulations of RUTF, or by an RUTF with elevated short-chain n-3 PUFA without additional preformed long-chain n-3 PUFA. Clinical and growth implications of revised formulations need to be addressed in large clinical trials. TRIAL REGISTRATION Clinicaltrials.gov NCT01593969. Registered 4 May 2012.
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Affiliation(s)
- Kelsey D J Jones
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
- Centre for Global Health Research and Section of Paediatrics, Imperial College, Norfolk Place, London, W2 1PG, UK.
| | - Rehema Ali
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | | | - Dennis Odera
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | - Annette L West
- Faculty of Medicine, University of Southampton, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
| | - Grielof Koster
- Faculty of Medicine, University of Southampton, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
| | - Peter Akomo
- Valid Nutrition, Cuibín Farm, Derry Duff, Bantry, Co., Cork, Republic of Ireland.
| | | | - Victoria M Goss
- Southampton National Institute of Health Research Respiratory Biomedical Research Unit, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
| | - Moses Ngari
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | | | - Said Ndoro
- Kilifi County Hospital, Ministry of Health, Kilifi, 230-80108, Kenya.
| | - Miguel A Garcia Knight
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
- Nuffield Department of Clinical Medicine, Centre for Tropical Medicine & Global Health, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford, OX3 7FZ, UK.
| | - Kenneth Omollo
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | - Anne Ndungu
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | - Musa M Mulongo
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
| | - Paluku Bahwere
- Valid International, 35 Leopold Street, Oxford, OX4 1TW, UK.
| | - Greg Fegan
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
- Nuffield Department of Clinical Medicine, Centre for Tropical Medicine & Global Health, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford, OX3 7FZ, UK.
| | - John O Warner
- Centre for Global Health Research and Section of Paediatrics, Imperial College, Norfolk Place, London, W2 1PG, UK.
| | - Anthony D Postle
- Faculty of Medicine, University of Southampton, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
| | - Steve Collins
- Valid Nutrition, Cuibín Farm, Derry Duff, Bantry, Co., Cork, Republic of Ireland.
- Valid International, 35 Leopold Street, Oxford, OX4 1TW, UK.
| | - Philip C Calder
- Faculty of Medicine, University of Southampton, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
- National Institute of Health Southampton Biomedical Research Centre, Southampton General Hosptial, Tremona Road, Southampton, SO16 6YD, UK.
| | - James A Berkley
- KEMRI-Wellcome Trust Research Programme, Kilifi, 230-80108, Kenya.
- Nuffield Department of Clinical Medicine, Centre for Tropical Medicine & Global Health, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford, OX3 7FZ, UK.
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Wood KE, Mantzioris E, Gibson RA, Ramsden CE, Muhlhausler BS. The effect of modifying dietary LA and ALA intakes on omega-3 long chain polyunsaturated fatty acid (n-3 LCPUFA) status in human adults: a systematic review and commentary. Prostaglandins Leukot Essent Fatty Acids 2015; 95:47-55. [PMID: 25687496 PMCID: PMC9406118 DOI: 10.1016/j.plefa.2015.01.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/19/2014] [Accepted: 01/05/2015] [Indexed: 11/18/2022]
Abstract
This paper presents a systematic review of human studies investigating the effect of altering dietary omega-3 polyunsaturated fatty acid (n-3 PUFA) alpha-linolenic acid (ALA) and omega-6 polyunsaturated fatty acid (n-6 PUFA) linoleic acid (LA) intakes on n-3 long-chain polyunsaturated fatty acid (LCPUFA) status in adult humans. The results suggest that it is possible to increase n-3 LCPUFA status by reducing LA and/or increasing ALA intake in humans, although decreasing LA intake to below 2.5%E may be required to specifically increase levels of the n-3 LCPUFA docosahexaenoic acid (DHA). The majority of studies in this area to date have been relatively poor in quality, which limits the ability to draw robust conclusions, and we present a series of recommendations to improve the quality of future studies in fatty acid nutrition in humans.
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Affiliation(s)
- K E Wood
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - E Mantzioris
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia
| | - R A Gibson
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - C E Ramsden
- Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - B S Muhlhausler
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia.
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Ha BK, Kim HJ, Velusamy V, Vuong TD, Nguyen HT, Shannon JG, Lee JD. Identification of quantitative trait loci controlling linolenic acid concentration in PI483463 (Glycine soja). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2014; 127:1501-12. [PMID: 24794978 DOI: 10.1007/s00122-014-2314-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 04/12/2014] [Indexed: 05/14/2023]
Abstract
KEY MESSAGE The QTLs controlling alpha-linolenic acid concentration from wild soybean were mapped on nine soybean chromosomes with various phenotypic variations. New QTLs for alpha-linolenic acid were detected in wild soybean. Alpha-linolenic acid (ALA) is a polyunsaturated fatty acid desired in human and animal diets. Some wild soybean (Glycine soja) genotypes are high in ALA. The objective of this study was to identify quantitative trait loci (QTLs) controlling ALA concentration in a wild soybean accession, PI483463. In total, 188 recombinant inbred lines of F5:6, F5:7, and F5:8 generations derived from a cross of wild soybean PI483463 (~15 % ALA) and cultivar Hutcheson (~9 % ALA) were planted in four environments. Harvested seeds were used to measure fatty acid concentration. Single nucleotide polymorphism markers of the universal soybean linkage panel (USLP 1.0) and simple sequence repeat markers were used for molecular genotyping. Nine putative QTLs were identified that controlled ALA concentration by model-based composite interval mapping and mapped to different soybean chromosomes. The QTLs detected in four environments explained 2.4-7.9 % of the total phenotypic variation (PV). Five QTLs, qALA5_3, qALA6_1, qALA14_1, qALA15_1, and qALA17_1, located on chromosomes 5, 6, 14, 15, and 17 were identified by model-based composite interval mapping and composite interval mapping in two individual environments. Among them, qALA6_1 showed the highest contribution to the PV with 10.0-10.2 % in two environments. The total detected QTLs for additive and epistatic effects explained 52.4 % of the PV for ALA concentration. These findings will provide useful information for understanding genetic structure and marker-assisted breeding programs to increase ALA concentration in seeds derived from wild soybean PI483463.
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Affiliation(s)
- Bo-Keun Ha
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, 580-185, Republic of Korea
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Taha AY, Cheon Y, Faurot KF, Macintosh B, Majchrzak-Hong SF, Mann JD, Hibbeln JR, Ringel A, Ramsden CE. Dietary omega-6 fatty acid lowering increases bioavailability of omega-3 polyunsaturated fatty acids in human plasma lipid pools. Prostaglandins Leukot Essent Fatty Acids 2014; 90:151-7. [PMID: 24675168 PMCID: PMC4035030 DOI: 10.1016/j.plefa.2014.02.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 02/03/2014] [Accepted: 02/04/2014] [Indexed: 01/22/2023]
Abstract
BACKGROUND Dietary linoleic acid (LA, 18:2n-6) lowering in rats reduces n-6 polyunsaturated fatty acid (PUFA) plasma concentrations and increases n-3 PUFA (eicosapentaenoic (EPA) and docosahexaenoic acid (DHA)) concentrations. OBJECTIVE To evaluate the extent to which 12 weeks of dietary n-6 PUFA lowering, with or without increased dietary n-3 PUFAs, alters unesterified and esterified plasma n-6 and n-3 PUFA concentrations in subjects with chronic headache. DESIGN Secondary analysis of a randomized trial. Subjects with chronic headache were randomized for 12 weeks to (1) average n-3, low n-6 (L6) diet; or (2) high n-3, low n-6 LA (H3-L6) diet. Esterified and unesterified plasma fatty acids were quantified at baseline (0 weeks) and after 12 weeks on a diet. RESULTS Compared to baseline, the L6 diet reduced esterified plasma LA and increased esterified n-3 PUFA concentrations (nmol/ml), but did not significantly change plasma arachidonic acid (AA, 20:4n-6) concentration. In addition, unesterified EPA concentration was increased significantly among unesterified fatty acids. The H3-L6 diet decreased esterified LA and AA concentrations, and produced more marked increases in esterified and unesterified n-3 PUFA concentrations. CONCLUSION Dietary n-6 PUFA lowering for 12 weeks significantly reduces LA and increases n-3 PUFA concentrations in plasma, without altering plasma AA concentration. A concurrent increase in dietary n-3 PUFAs for 12 weeks further increases n-3 PUFA plasma concentrations and reduces AA.
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Affiliation(s)
- Ameer Y Taha
- Brain Physiology and Metabolism Section, Laboratory of Neuroscience, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
| | - Yewon Cheon
- Brain Physiology and Metabolism Section, Laboratory of Neuroscience, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Keturah F Faurot
- Department of Physical Medicine and Rehabilitation, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Beth Macintosh
- Nutrition Research and Metabolism Core, North Carolina Translational Clinical Sciences Institute, University of North Carolina, Chapel Hill, USA
| | - Sharon F Majchrzak-Hong
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - J Douglas Mann
- Department of Neurology, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Joseph R Hibbeln
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Amit Ringel
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Christopher E Ramsden
- Section on Nutritional Neurosciences, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA; Department of Physical Medicine and Rehabilitation, Program on Integrative Medicine, University of North Carolina, Chapel Hill, NC, USA
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Alvheim AR, Torstensen BE, Lin YH, Lillefosse HH, Lock EJ, Madsen L, Frøyland L, Hibbeln JR, Malde MK. Dietary linoleic acid elevates the endocannabinoids 2-AG and anandamide and promotes weight gain in mice fed a low fat diet. Lipids 2013; 49:59-69. [PMID: 24081493 PMCID: PMC3889814 DOI: 10.1007/s11745-013-3842-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 09/06/2013] [Indexed: 12/18/2022]
Abstract
Dietary intake of linoleic acid (LNA, 18:2n-6) has increased dramatically during the 20th century and is associated with greater prevalence of obesity. The endocannabinoid system is involved in regulation of energy balance and a sustained hyperactivity of the endocannabinoid system may contribute to obesity. Arachidonic acid (ARA, 20:4n-6) is the precursor for 2-AG and anandamide (AEA), and we sought to determine if low fat diets (LFD) could be made obesogenic by increasing the endocannabinoid precursor pool of ARA, causing excessive endocannabinoid signaling leading to weight gain and a metabolic profile associated with obesity. Mice (C57BL/6j, 6 weeks of age) were fed 1 en% LNA and 8 en% LNA in low fat (12.5 en%) and medium fat diets (MFD, 35 en%) for 16 weeks. We found that increasing dietary LNA from 1 to 8 en% in LFD and MFD significantly increased ARA in phospholipids (ARA–PL), elevated 2-AG and AEA in liver, elevated plasma leptin, and resulted in larger adipocytes and more macrophage infiltration in adipose tissue. In LFD, dietary LNA of 8 en% increased feed efficiency and caused greater weight gain than in an isocaloric reduction to 1 en% LNA. Increasing dietary LNA from 1 to 8 en% elevates liver endocannabinoid levels and increases the risk of developing obesity. Thus a high dietary content of LNA (8 en%) increases the adipogenic properties of a low fat diet.
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Affiliation(s)
- Anita Røyneberg Alvheim
- National Institute of Nutrition and Seafood Research (NIFES), P. O. Box 2029, Nordnes, 5817, Bergen, Norway
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Sheppard KW, Cheatham CL. Omega-6 to omega-3 fatty acid ratio and higher-order cognitive functions in 7- to 9-y-olds: a cross-sectional study. Am J Clin Nutr 2013; 98:659-67. [PMID: 23824723 DOI: 10.3945/ajcn.113.058719] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Biochemical and behavioral evidence has suggested that the ratio of n-6 (omega-6) to n-3 (omega-3) could be an important predictor of executive function abilities in children. OBJECTIVE We determined the relation between the ratio of n-6 to n-3 and cognitive function in children. We hypothesized that children with lower ratios of n-6 to n-3 fatty acids would perform better on tests of planning and working memory. DESIGN Seventy 7- to 9-y-old children completed three 24-h diet recalls and a subset of the Cambridge Neuropsychological Test Assessment Battery. Parents provided information on their demographics and children's diet histories. RESULTS Mean n-3 and mean n-6 intakes were related to the mean time spent on each action taken in the planning problem. The ratio of n-6 to n-3 significantly predicted performance on the working memory and planning problems. There was a significant interaction between the ratio and fatty acid intake; when children had high ratios, a higher intake of n-3 fatty acids predicted a better performance on the planning task than when children had lower n-3 intakes. When children had low ratios, a lower intake of n-3 and lower intake of n-6 predicted better performance than when intakes were higher. CONCLUSIONS The relation between cognitive abilities and the ratio of n-6 to n-3 may be mediated by an enzymatic affinity for n-3 fatty acids. The ratio of n-6 to n-3 should be considered an important factor in the study of fatty acids and cognitive development. This trial was registered at clinicaltrials.gov as NCT01823419.
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Affiliation(s)
- Kelly W Sheppard
- Department of Psychology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Abstract
Few trials have evaluated the metabolic effects and health outcomes of lowering dietary n-6 PUFA. The objectives of the present paper were (1) to report the methods employed to lower dietary n-6 PUFA, while either increasing or maintaining n-3 PUFA intake and (2) to validate our methods with 24 h recalls and erythrocyte fatty acid analyses. A total of sixty-seven subjects were randomised to either (1) an average-n-3 PUFA, low-n-6 PUFA (L6) intervention designed to lower linoleic acid (LA; #2·5% of energy (en%)) and arachidonic acid (#60 mg/d), while maintaining an average US intake of n-3 PUFA or (2) a high-n-3 PUFA, low-n-6 PUFA (H3-L6) intervention designed to lower n-6 LA, while increasing the n-3 PUFA a-linolenic acid (ALA; $1·5 en%) and EPA þ DHA ($1000 mg/d). Pre- and intraintervention nutrient intakes were estimated with six 24 h dietary recalls per subject. Both groups achieved the targeted reductions in dietary LA to #2·5 en% (median LA 2·45 (2·1, 3·1); P,0·001). Intakes of n-3 PUFA did not change for the L6 group. Target increases in n-3 ALA (median 1·6 en%, (1·3, 2·0), P,0·001) and EPA þ DHA (1482 mg, (374, 2558), P,0·001) were achieved in the H3-L6 group. Dietary changes were validated by corresponding changes in erythrocyte n-6 and n-3 fatty acid composition. Dietary LA can be lowered to #2·5 en%, with or without concurrent increases in dietary n-3 PUFA, in an outpatient clinical trial setting using this integrated diet method.
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Gibson RA, Neumann MA, Lien EL, Boyd KA, Tu WC. Docosahexaenoic acid synthesis from alpha-linolenic acid is inhibited by diets high in polyunsaturated fatty acids. Prostaglandins Leukot Essent Fatty Acids 2013; 88:139-46. [PMID: 22515943 DOI: 10.1016/j.plefa.2012.04.003] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 04/02/2012] [Accepted: 04/03/2012] [Indexed: 11/22/2022]
Abstract
The conversion of the plant-derived omega-3 (n-3) α-linolenic acid (ALA, 18:3n-3) to the long-chain eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) can be increased by ALA sufficient diets compared to ALA deficient diets. Diets containing ALA above an optimal level result in no further increase in DHA levels in animals and humans. The present study evaluates means of maximizing plasma DHA accumulation by systematically varying both linoleic acid (LA, 18:2n-6) and ALA dietary level. Weanling rats were fed one of 54 diets for three weeks. The diets varied in the percentage of energy (en%) of LA (0.07-17.1 en%) and ALA (0.02-12.1 en%) by manipulating both the fat content and the balance of vegetable oils. The peak of plasma phospholipid DHA (>8% total fatty acids) was attained as a result of feeding a narrow dietary range of 1-3 en% ALA and 1-2 en% LA but was suppressed to basal levels (∼2% total fatty acids) at dietary intakes of total polyunsaturated fatty acids (PUFA) above 3 en%. We conclude it is possible to enhance the DHA status of rats fed diets containing ALA as the only source of n-3 fatty acids but only when the level of dietary PUFA is low (<3 en%).
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MESH Headings
- Algorithms
- Animals
- Diet, Fat-Restricted
- Diet, High-Fat/adverse effects
- Docosahexaenoic Acids/blood
- Docosahexaenoic Acids/metabolism
- Eicosapentaenoic Acid/blood
- Eicosapentaenoic Acid/metabolism
- Fatty Acids, Essential/blood
- Fatty Acids, Essential/deficiency
- Fatty Acids, Essential/metabolism
- Fatty Acids, Omega-6/adverse effects
- Fatty Acids, Omega-6/blood
- Fatty Acids, Omega-6/chemistry
- Fatty Acids, Omega-6/metabolism
- Fatty Acids, Unsaturated/administration & dosage
- Fatty Acids, Unsaturated/adverse effects
- Fatty Acids, Unsaturated/analysis
- Fatty Acids, Unsaturated/blood
- Linoleic Acid/administration & dosage
- Linoleic Acid/adverse effects
- Linoleic Acid/blood
- Linoleic Acid/metabolism
- Linseed Oil/administration & dosage
- Linseed Oil/chemistry
- Linseed Oil/metabolism
- Male
- Phospholipids/blood
- Phospholipids/chemistry
- Phospholipids/metabolism
- Plant Oils/administration & dosage
- Plant Oils/adverse effects
- Plant Oils/chemistry
- Plant Oils/metabolism
- Rats
- Rats, Wistar
- Safflower Oil/administration & dosage
- Safflower Oil/adverse effects
- Safflower Oil/chemistry
- Safflower Oil/metabolism
- Sunflower Oil
- Weaning
- alpha-Linolenic Acid/administration & dosage
- alpha-Linolenic Acid/analysis
- alpha-Linolenic Acid/blood
- alpha-Linolenic Acid/metabolism
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Affiliation(s)
- R A Gibson
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, South Australia, Australia.
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Immune factors and fatty acid composition in human milk from river/lake, coastal and inland regions of China. Br J Nutr 2012; 109:1949-61. [DOI: 10.1017/s0007114512004084] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Breast milk fatty acid composition may be affected by the maternal diet during gestation and lactation. The influence of dietary and breast milk fatty acids on breast milk immune factors is poorly defined. We determined the fatty acid composition and immune factor concentrations of breast milk from women residing in river/lake, coastal and inland regions of China, which differ in their consumption of lean fish and oily fish. Breast milk samples were collected on days 3–5 (colostrum), 14 and 28 post-partum (PP) and analysed for soluble CD14 (sCD14), transforming growth factor (TGF)-β1, TGF-β2, secretory IgA (sIgA) and fatty acids. The fatty acid composition of breast milk differed between the regions and with time PP. The concentrations of all four immune factors in breast milk decreased over time, with sCD14, sIgA and TGF-β1 being highest in the colostrum in the river and lake region. Breast milk DHA and arachidonic acid (AA) were positively associated, and γ-linolenic acid and EPA negatively associated, with the concentrations of each of the four immune factors. In conclusion, breast milk fatty acids and immune factors differ between the regions in China characterised by different patterns of fish consumption and change during the course of lactation. A higher breast milk DHA and AA concentration is associated with higher concentrations of immune factors in breast milk, suggesting a role for these fatty acids in promoting gastrointestinal and immune maturation of the infant.
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Pham AT, Shannon JG, Bilyeu KD. Combinations of mutant FAD2 and FAD3 genes to produce high oleic acid and low linolenic acid soybean oil. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2012; 125:503-15. [PMID: 22476873 DOI: 10.1007/s00122-012-1849-z] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 03/10/2012] [Indexed: 05/03/2023]
Abstract
High oleic acid soybeans were produced by combining mutant FAD2-1A and FAD2-1B genes. Despite having a high oleic acid content, the linolenic acid content of these soybeans was in the range of 4-6 %, which may be high enough to cause oxidative instability of the oil. Therefore, a study was conducted to incorporate one or two mutant FAD3 genes into the high oleic acid background to further reduce the linolenic acid content. As a result, soybean lines with high oleic acid and low linolenic acid (HOLL) content were produced using different sources of mutant FAD2-1A genes. While oleic acid content of these HOLL lines was stable across two testing environments, the reduction of linolenic acid content varied depending on the number of mutant FAD3 genes combined with mutant FAD2-1 genes, on the severity of mutation in the FAD2-1A gene, and on the testing environment. Combination of two mutant FAD2-1 genes and one mutant FAD3 gene resulted in less than 2 % linolenic acid content in Portageville, Missouri (MO) while four mutant genes were needed to achieve the same linolenic acid in Columbia, MO. This study generated non-transgenic soybeans with the highest oleic acid content and lowest linolenic acid content reported to date, offering a unique alternative to produce a fatty acid profile similar to olive oil.
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Affiliation(s)
- Anh-Tung Pham
- Division of Plant Sciences, University of Missouri, 110 Waters Hall, Columbia, MO 65211, USA
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Simmer K, Patole SK, Rao SC. Long-chain polyunsaturated fatty acid supplementation in infants born at term. Cochrane Database Syst Rev 2011:CD000376. [PMID: 22161363 DOI: 10.1002/14651858.cd000376.pub3] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The n-3 and n-6 fatty acids linolenic acid and linoleic acid are precursors of the n-3 and n-6 long chain fatty acids (LCPUFA). Infant formula has historically only contained the precursor fatty acids. Over the last few years, some manufacturers have added LCPUFA to formulae and marketed them as providing an advantage for the development of term infants. OBJECTIVES To assess whether supplementation of formula with LCPUFA is safe and of benefit to term infants. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (The Cochrane Library, April, 2011), MEDLINE (1966 to April 2011), EMBASE (1980 to April 2011), CINAHL (December 1982 to April 2011) and abstracts of the Society for Pediatric Research (1980 to 2010). No language restrictions were applied. SELECTION CRITERIA Randomised and quasi randomised trials comparing LCPUFA supplemented vs. non-supplemented formula milk and with clinical endpoints were reviewed. DATA COLLECTION AND ANALYSIS Methodological quality of studies was assessed using the guidelines of Cochrane neonatal review group. Data were sought regarding effects on visual acuity, neurodevelopmental outcomes and physical growth. When appropriate, meta-analysis was conducted to provide a pooled estimate of effect. MAIN RESULTS Twenty-five randomised studies were identified; fifteen were included (n = 1889) and ten excluded.Visual acuity was assessed by nine studies. Visual evoked potential was used in six studies, two used Teller cards and one used both. Four studies reported beneficial effects while the remaining five did not.Neurodevelopmental outcome was measured by eleven studies. Bayley scales of infant development (BSID) was used in nine studies; only two showed beneficial effects. Meta-analysis did not show significant benefits of supplementation. One study followed the infants up to nine years of age and did not find benefit of supplementation. One study reported better novelty preference measured by Fagan Infant test at nine months. Another study reported better problem solving at 10 months. One study used Brunet and Lezine test to assess the developmental quotient and did not find beneficial effects.Physical growth was measured by thirteen studies; none found beneficial or harmful effects of supplementation. Meta-analysis found that supplemented group may have marginally lower weight at one year of age. AUTHORS' CONCLUSIONS Majority of the RCTS have not shown beneficial effects of LCPUFA supplementation on the neurodevelopmental outcomes of term infants. The beneficial effects on visual acuity have not been consistently demonstrated. Routine supplementation of term infant milk formula with LCPUFA can not be recommended.
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Affiliation(s)
- Karen Simmer
- Neonatal Care Unit, King Edward Memorial Hospital for Women and Princess Margaret Hospital for Children, Bagot Road, Subiaco, WA, Australia, 6008
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Pham AT, Lee JD, Shannon JG, Bilyeu KD. A novel FAD2-1 A allele in a soybean plant introduction offers an alternate means to produce soybean seed oil with 85% oleic acid content. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2011; 123:793-802. [PMID: 21681491 DOI: 10.1007/s00122-011-1627-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 05/27/2011] [Indexed: 05/24/2023]
Abstract
The alteration of fatty acid profiles in soybean to improve soybean oil quality has been a long-time goal of soybean researchers. Soybean oil with elevated oleic acid is desirable because this monounsaturated fatty acid improves the nutrition and oxidative stability of soybean oil compared to other oils. In the lipid biosynthetic pathway, the enzyme fatty acid desaturase 2 (FAD2) is responsible for the conversion of oleic acid precursors to linoleic acid precursors in developing soybean seeds. Two genes encoding FAD2-1A and FAD2-1B were identified to be expressed specifically in seeds during embryogenesis and have been considered to hold an important role in controlling the seed oleic acid content. A total of 22 soybean plant introduction (PI) lines identified to have an elevated oleic acid content were characterized for sequence mutations in the FAD 2-1A and FAD2-1B genes. PI 603452 was found to contain a deletion of a nucleotide in the second exon of FAD2-1A. These important SNPs were used in developing molecular marker genotyping assays. The assays appear to be a reliable and accurate tool to identify the FAD 2-1A and FAD2-1B genotype of wild-type and mutant plants. PI 603452 was subsequently crossed with PI 283327, a soybean line that has a mutation in FAD2-1B. Interestingly, soybean lines carrying both homozygous insertion/deletion mutation (indel) FAD2-1A alleles and mutant FAD2-1B alleles have an average of 82-86% oleic acid content, compared to 20% in conventional soybean, and low levels of linoleic and linolenic acids. The newly identified indel mutation in the FAD2-1A gene offers a simple method for the development of high oleic acid commercial soybean varieties.
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Affiliation(s)
- Anh-Tung Pham
- Division of Plant Sciences, University of Missouri, 110 Waters Hall, Columbia, MO 65211, USA
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Briend A, Dewey KG, Reinhart GA. Fatty acid status in early life in low-income countries--overview of the situation, policy and research priorities. MATERNAL AND CHILD NUTRITION 2011; 7 Suppl 2:141-8. [PMID: 21366873 DOI: 10.1111/j.1740-8709.2011.00305.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fat intake may be low in low-income countries and little information is available on its composition in terms of (n-3) and (n-6) fatty acids (FA). As a result, long chain poly-unsaturated fatty acid (LCPUFA) status is a concern, especially in settings where fish intake is low and/or common sources of fat have a low alpha-linolenic acid (ALA) and high linoleic acid (LA) content. High LA levels, as found for instance in sunflower, safflower, corn, peanut and soy oils, may inhibit the conversion of ALA into its LC-PUFA derivatives. Other factors that affect LA and ALA conversion into LC-PUFA, including genetic factors, are little known and should also be investigated in different populations. Different interventions that could feasibly improve LC-PUFA status in low-income countries should be tested and their effects on functional outcomes assessed, preferably starting from pregnancy. Identifying affordable sources of ALA or LC-PUFA that could be made locally available and easily introduced in the diet early in life is also a priority.
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Affiliation(s)
- André Briend
- Department of International Health, University of Tampere Medical School, Tampere Kalevantie 4, Finland.
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Gibson RA, Muhlhausler B, Makrides M. Conversion of linoleic acid and alpha-linolenic acid to long-chain polyunsaturated fatty acids (LCPUFAs), with a focus on pregnancy, lactation and the first 2 years of life. MATERNAL AND CHILD NUTRITION 2011; 7 Suppl 2:17-26. [PMID: 21366864 DOI: 10.1111/j.1740-8709.2011.00299.x] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Over the past two decades, there has been a marked shift in the fatty acid composition of the diets of industrialized nations towards increased intake of the n-6 fatty acid linoleic acid (LA, 18:2n-6), largely as a result of the replacement of saturated fats with plant-based polyunsaturated fatty acid (PUFA). While health agencies internationally continue to advocate for high n-6 PUFA intake combined with increased intakes of preformed n-3 long-chain PUFAs (LCPUFA) docosahexaenoic acid (DHA, 22:6n-3) and eicosapentaenoic acid (EPA, 20:5n-3) to reduce the incidence of cardiovascular disease (CVD), there are questions as to whether this is the best approach. LA competes with alpha-linolenic acid (18:3n-3) for endogenous conversion to the LC derivatives EPA and DHA, and LA also inhibits incorporation of DHA and EPA into tissues. Thus, high-LA levels in the diet generally result in low n-3 LCPUFA status. Pregnancy and infancy are developmental periods during which the fatty acid supply is particularly critical. The importance of an adequate supply of n-3 LCPUFA for ensuring optimal development of infant brain and visual systems is well established, and there is now evidence that the supply of n-3 LCPUFA also influences a range of growth, metabolic and immune outcomes in childhood. This review will re-evaluate the health benefits of modern Western diets and pose the question of whether the introduction of similar diets to nations with emerging economies is the most prudent public health strategy for improving health in these populations.
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Affiliation(s)
- Robert A Gibson
- Child Nutrition Research Centre, Women's and Children's Health Research Institute, Children, Youth and Women's Health Service, North Adelaide, South Australia, Australia.
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Blasbalg TL, Hibbeln JR, Ramsden CE, Majchrzak SF, Rawlings RR. Changes in consumption of omega-3 and omega-6 fatty acids in the United States during the 20th century. Am J Clin Nutr 2011; 93:950-62. [PMID: 21367944 PMCID: PMC3076650 DOI: 10.3945/ajcn.110.006643] [Citation(s) in RCA: 590] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND The consumption of omega-3 (n-3) and omega-6 (n-6) essential fatty acids in Western diets is thought to have changed markedly during the 20th century. OBJECTIVE We sought to quantify changes in the apparent consumption of essential fatty acids in the United States from 1909 to 1999. DESIGN We calculated the estimated per capita consumption of food commodities and availability of essential fatty acids from 373 food commodities by using economic disappearance data for each year from 1909 to 1999. Nutrient compositions for 1909 were modeled by using current foods (1909-C) and foods produced by traditional early 20th century practices (1909-T). RESULTS The estimated per capita consumption of soybean oil increased >1000-fold from 1909 to 1999. The availability of linoleic acid (LA) increased from 2.79% to 7.21% of energy (P < 0.000001), whereas the availability of α-linolenic acid (ALA) increased from 0.39% to 0.72% of energy by using 1909-C modeling. By using 1909-T modeling, LA was 2.23% of energy, and ALA was 0.35% of energy. The ratio of LA to ALA increased from 6.4 in 1909 to 10.0 in 1999. The 1909-T but not the 1909-C data showed substantial declines in dietary availability (percentage of energy) of n-6 arachidonic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). Predicted net effects of these dietary changes included declines in tissue n--3 highly unsaturated fatty acid status (36.81%, 1909-T; 31.28%, 1909-C; 22.95%, 1999) and declines in the estimated omega-3 index (8.28, 1909-T; 6.51, 1909-C; 3.84, 1999). CONCLUSION The apparent increased consumption of LA, which was primarily from soybean oil, has likely decreased tissue concentrations of EPA and DHA during the 20th century.
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Affiliation(s)
- Tanya L Blasbalg
- Section on Nutritional Neuroscience, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
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Nettleton JA, Koletzko B, Hornstra G. ISSFAL 2010 dinner debate: healthy fats for healthy hearts - annotated report of a scientific discussion. ANNALS OF NUTRITION AND METABOLISM 2011; 58:59-65. [PMID: 21430375 DOI: 10.1159/000324749] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND/AIMS The importance of reducing saturated fatty acid intake to prevent cardiovascular disease and recommended intakes for omega-6 polyunsaturated fatty acids (PUFAs) are controversial. Therefore, experts debated these topics at the biennial meeting of the International Society for the Study of Fatty Acids and Lipids (ISSFAL), in May 2010. METHODS Debate transcripts, debaters' and discussants' reviews and literature citations were the basis of this report. RESULTS Participants agreed that saturates per se are not 'bad', but that dietary recommendations should emphasize the substitution of unsaturates for part of the saturates. Evidence supporting omega-6 PUFA intakes of 5 to 10% is mixed; some interpret the overall data from diverse studies as consistent with a reduction in the risk of cardiovascular mortality and events. Others assert that randomized controlled trial data suggest that higher intakes of omega-6 PUFAs are not associated with lower risk of heart disease, or may even increase it. CONCLUSIONS All agreed that a 5-year randomized controlled trial comparing the effects of historically low (2%) with currently high (7.5%) linoleic acid intakes on cardiac endpoints would address the knowledge gap about the effects of different omega-6 PUFA intakes on the risk of heart disease.
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Schulzke SM, Patole SK, Simmer K. Long-chain polyunsaturated fatty acid supplementation in preterm infants. Cochrane Database Syst Rev 2011:CD000375. [PMID: 21328248 DOI: 10.1002/14651858.cd000375.pub4] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Controversy exists over whether longchain polyunsaturated fatty acids (LCPUFA) are essential nutrients for preterm infants, who may not be able to synthesise sufficient amounts of LCPUFA to satisfy the needs of the developing brain and retina. OBJECTIVES The aim of this review is to assess whether supplementation of formula with LCPUFA is safe and of benefit to preterm infants. SEARCH STRATEGY Trials were identified by MEDLINE (1966 to December 2009), Oxford Database of Perinatal Trials, Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 4, 2009) and by checking reference lists of articles and conference proceedings. SELECTION CRITERIA All randomised trials of formula supplemented with LCPUFA and with clinical endpoints were reviewed. DATA COLLECTION AND ANALYSIS All authors assessed eligibility and trial quality, two authors extracted data separately. Study authors were contacted for additional information. MAIN RESULTS Of the 17 trials included in the review, 13 were classified as of high quality. Visual acuity Visual acuity over the first year was measured by Teller or Lea acuity cards in eight studies, by VEP in six studies and by ERG in two studies. Most studies found no significant differences in visual assessment between supplemented and control infants.Development Three out of seven studies reported some benefit of LCPUFA on neurodevelopment in different populations at different postnatal ages. Meta-analysis of Bayley Scales of Infant Development of four studies at 12 months (N = 364) and three studies at 18 months (N = 494) post-term showed no significant effect of supplementation on neurodevelopment.Growth Four out of 15 studies reported benefits of LCPUFA on growth of supplemented infants at different postnatal ages. Two trials suggested that LCPUFA supplemented infants grow less well than controls. One trial reported mild reductions in length and weight z scores at 18 months. Meta-analysis of five studies showed increased weight and length at two months post-term in supplemented infants. Meta-analysis of four studies at 12 months (N = 271) and two studies at 18 months (N = 396) post-term showed no significant effect of supplementation on weight, length or head circumference. AUTHORS' CONCLUSIONS Infants enrolled in the trials were relatively mature and healthy preterm infants. Assessment schedule and methodology, dose and source of supplementation and fatty acid composition of the control formula varied between trials. On pooling of results, no clear long-term benefits or harms were demonstrated for preterm infants receiving LCPUFA-supplemented formula.
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Affiliation(s)
- Sven M Schulzke
- Department of Neonatology, University of Basel Children's Hospital (UKBB), Spitalstrasse 21, Basel, Switzerland, 4031
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Goedhart AC, Bindels JG. The composition of human milk as a model for the design of infant formulas: recent findings and possible applications. Nutr Res Rev 2009; 7:1-23. [PMID: 19094290 DOI: 10.1079/nrr19940004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A C Goedhart
- Nutricia Research, P. O. Box 1, 2700 MA Zoetermeer, The Netherlands
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Alpha-linolenic acid and its conversion to longer chain n-3 fatty acids: benefits for human health and a role in maintaining tissue n-3 fatty acid levels. Prog Lipid Res 2009; 48:355-74. [PMID: 19619583 DOI: 10.1016/j.plipres.2009.07.002] [Citation(s) in RCA: 386] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 06/13/2009] [Accepted: 07/14/2009] [Indexed: 11/22/2022]
Abstract
There is little doubt regarding the essential nature of alpha-linolenic acid (ALA), yet the capacity of dietary ALA to maintain adequate tissue levels of long chain n-3 fatty acids remains quite controversial. This simple point remains highly debated despite evidence that removal of dietary ALA promotes n-3 fatty acid inadequacy, including that of docosahexaenoic acid (DHA), and that many experiments demonstrate that dietary inclusion of ALA raises n-3 tissue fatty acid content, including DHA. Herein we propose, based upon our previous work and that of others, that ALA is elongated and desaturated in a tissue-dependent manner. One important concept is to recognize that ALA, like many other fatty acids, rapidly undergoes beta-oxidation and that the carbons are conserved and reused for synthesis of other products including cholesterol and fatty acids. This process and the differences between utilization of dietary DHA or liver-derived DHA as compared to ALA have led to the dogma that ALA is not a useful fatty acid for maintaining tissue long chain n-3 fatty acids, including DHA. Herein, we propose that indeed dietary ALA is a crucial dietary source of n-3 fatty acids and its dietary inclusion is critical for maintaining tissue long chain n-3 levels.
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Yang Q, O'Shea TM. Dietary Echium oil increases tissue (n-3) long-chain polyunsaturated fatty acids without elevating hepatic lipid concentrations in premature neonatal rats. J Nutr 2009; 139:1353-9. [PMID: 19439463 DOI: 10.3945/jn.109.105221] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Echium oil (EO) contains notable quantities of both (n-6) and (n-3) PUFA and has not, to our knowledge, been studied in neonates. We compared growth, tissue PUFA concentrations, and liver lipid profiles in premature neonatal Sprague-Dawley rats that were fed an EO diet with those that were dam-fed (DF) or fed rat milk substitute (RMS) or a fish oil (FO) diet. EO or FO comprised 10% of dietary fat. Rats were delivered prematurely at d 21 of gestation by caesarean section and then DF or fed one of the diets for 6 d. Rats were killed and the fatty acid (FA) concentrations in brain, liver, ileum, and serum and liver lipid profiles were analyzed. All diet-fed rats had similar weight gain and tissue protein concentrations. Compared with DF rats, EO-fed rats had similar brain docosahexaenoic acid (DHA) levels, similar brain and liver arachidonic acid (ARA) levels, higher liver and ileal eicosapentaenoic acid (EPA) levels (P < 0.05), and similar ARA:(EPA+DHA) ratios in brain, liver, and serum. Compared with RMS-fed rats, EO-fed rats had lower liver triglyceride FA and cholesterol ester concentrations (P < 0.05), higher EPA and DHA levels in liver, ileum, and serum, a higher DHA level in brain, and lower tissue and serum ratios of total (n-6):(n-3) PUFA and ARA:(EPA + DHA) (P < 0.05). Compared with FO-fed rats, EO-fed rats had higher ARA levels in brain, liver, ileum, and serum. In conclusion, dietary EO increases tissue EPA and DHA without reducing ARA in brain and liver and without elevating hepatic lipid concentrations of premature neonatal rats.
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Affiliation(s)
- Qing Yang
- Department of Pediatrics, Division of Neonatology, Wake Forest University Health Science, Winston-Salem, NC 27157, USA
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Brenna JT, Salem N, Sinclair AJ, Cunnane SC. alpha-Linolenic acid supplementation and conversion to n-3 long-chain polyunsaturated fatty acids in humans. Prostaglandins Leukot Essent Fatty Acids 2009; 80:85-91. [PMID: 19269799 DOI: 10.1016/j.plefa.2009.01.004] [Citation(s) in RCA: 554] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 01/15/2009] [Indexed: 01/25/2023]
Abstract
Blood levels of polyunsaturated fatty acids (PUFA) are considered biomarkers of status. Alpha-linolenic acid, ALA, the plant omega-3, is the dietary precursor for the long-chain omega-3 PUFA eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA), and docosahexaenoic acid (DHA). Studies in normal healthy adults consuming western diets, which are rich in linoleic acid (LA), show that supplemental ALA raises EPA and DPA status in the blood and in breast milk. However, ALA or EPA dietary supplements have little effect on blood or breast milk DHA levels, whereas consumption of preformed DHA is effective in raising blood DHA levels. Addition of ALA to the diets of formula-fed infants does raise DHA, but no level of ALA tested raises DHA to levels achievable with preformed DHA at intakes similar to typical human milk DHA supply. The DHA status of infants and adults consuming preformed DHA in their diets is, on average, greater than that of people who do not consume DHA. With no other changes in diet, improvement of blood DHA status can be achieved with dietary supplements of preformed DHA, but not with supplementation of ALA, EPA, or other precursors.
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Affiliation(s)
- J Thomas Brenna
- Division of Nutritional Sciences, Cornell University, Savage Hall, Ithaca, NY 14853, USA.
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Simmer K, Patole SK, Rao SC. Long-chain polyunsaturated fatty acid supplementation in infants born at term. Cochrane Database Syst Rev 2008:CD000376. [PMID: 18253974 DOI: 10.1002/14651858.cd000376.pub2] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND The n-3 and n-6 fatty acids linolenic acid and linoleic acid are precursors of the n-3 and n-6 long chain fatty acids (LCPUFA). Infant formula has historically only contained the precursor fatty acids. Controversy exists over whether LCPUFA are also essential nutrients in infancy. Over the last few years, some manufacturers have added LCPUFA to formulae and marketed them as providing an advantage for the development of term infants. OBJECTIVES To assess whether supplementation of formula with LCPUFA is safe and of benefit to term infants. SEARCH STRATEGY Eligible studies were identified by searching MEDLINE (March 2007), EMBASE 1980 - 2007, Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 1, 2007) and CINAHL (December 1982 - March 2007). Abstracts of the Society for Pediatric Research were hand searched from 1980 to 2006 inclusive. Reference lists of published narrative and systematic reviews were also reviewed. No language restrictions were applied. SELECTION CRITERIA All randomised and quasi randomised trials comparing LCPUFA supplemented formula milk vs. non-supplemented formula milk and with clinical endpoints were reviewed. DATA COLLECTION AND ANALYSIS Methodological quality of eligible studies was assessed according to allocation concealment, blinding of intervention, blinding of outcome assessment and completeness of follow up. Data were sought regarding effects on visual acuity, neurodevelopmental outcomes and physical growth. When appropriate, meta-analysis was conducted to provide a pooled estimate of effect. Continuous data were analysed using weighted mean difference (WMD). There were no categorical outcomes in this review. MAIN RESULTS Twenty randomised studies were identified. Fourteen were included (n = 1719) and six excluded. Eleven included studies were of good quality. The main outcomes assessed were visual acuity, neurodevelopmental and physical growth. Visual acuity was measured at various stages throughout the first three years of life by nine studies. Visual evoked potential was used to assess visual acuity in five studies. The remaining four used Teller visual acuity cards. The results were inconsistent. Three studies reported beneficial effect of LCPUFA supplementation on visual acuity while the remaining six did not. Neurodevelopmental outcome was measured at different ages throughout the first two years by eleven studies. Bayley scales of infant development (BSID) was used in eight studies. Only one showed beneficial effect of LCPUFA supplementation on BSID scales. Pooled meta-analysis of the data also did not show any statistically significant benefit of LCPUFA supplementation on either mental or psychomotor developmental index of BSID. One study reported better novelty preference measured by Fagan Infant test at nine months in supplemented infants compared with controls. Another study reported better problem solving at 10 months with supplementation. One study used Brunet and Lezine developmental test to assess the developmental quotient and did not find beneficial effects of LCPUFA supplementation. Physical growth was measured at various ages throughout first three years of life by twelve studies. Some studies reported the actual measurements while some reported the rate of growth over a time period. Some studies z scores. Irrespective of the type of LCPUFA supplementation, duration of supplementation and method of assessment, none of the individual studies found beneficial or harmful effects of LCPUFA supplementation. Meta-analysis of relevant studies also did not show any effect of LCPUFA supplementation on growth of term infants. AUTHORS' CONCLUSIONS The results of most of the well conducted RCTS have not shown beneficial effects of LCPUFA supplementation of formula milk on the physical, visual and neurodevelopmental outcomes of infants born at term. Only one group of researchers have shown some beneficial effects on VEP acuity. Two groups of researchers have shown some beneficial effect on mental development. Routine supplementation of milk formula with LCPUFA to improve the physical, neurodevelopmental or visual outcomes of infants born at term can not be recommended based on the current evidence. Further research is needed to see if the beneficial effects demonstrated by Dallas 2005 trial of Birch et al can be replicated in different settings.
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Affiliation(s)
- K Simmer
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for Children, Neonatal Clinical Care Unit, Bagot Road, Subiaco, WA, Australia 6008.
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Simmer K, Schulzke SM, Patole S. Long-chain polyunsaturated fatty acid supplementation in preterm infants. Cochrane Database Syst Rev 2008:CD000375. [PMID: 18253973 DOI: 10.1002/14651858.cd000375.pub3] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The n-3 and n-6 essential fatty acids alpha linolenic acid (ALA) and linoleic acid (LA) are the precursors of the n-3 and n-6 longchain polyunsaturated fatty acids (LCPUFA). Controversy exists over whether LCPUFA are essential nutrients for preterm infants, who may not be able to synthesise sufficient amounts of LCPUFA to satisfy the needs of the developing brain and retina. OBJECTIVES The aim of this review is to assess whether supplementation of formula with LCPUFA is safe and of benefit to preterm infants. SEARCH STRATEGY Trials were identified by MEDLINE (February 2007), Oxford Database of Perinatal Trials, Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 1, 2007) and by checking reference lists of relevant articles and conference proceedings. SELECTION CRITERIA All randomised trials of formula supplemented with LCPUFA and with clinical endpoints were reviewed. DATA COLLECTION AND ANALYSIS Fifteen randomised trials assessing the clinical effects of feeding formula supplemented with LCPUFA were included in the review. MAIN RESULTS Of the fifteen randomised trials included in the review, four of these were not classified as of high quality, due to low follow-up, uncertainty regarding concealment of patient allocation and randomisation, and problems with assessment methodology. VISUAL ACUITY: Visual acuity over the first year was measured by Teller or Lea acuity cards in eight studies, by VEP in six studies and by ERG in two studies. Most studies found no significant differences in any visual assessment between supplemented and control infants. DEVELOPMENT Most of the trials have used Bayley Scales of Infant Development (BSID) at 12 to 24 months post-term with three out of seven studies reporting some benefit of LCPUFA in different populations of supplemented infants at different postnatal ages. Meta-analysis of BSID of four studies at 12 months (N = 364) and three studies at 18 months (N = 494) post-term showed no significant effect of supplementation on neurodevelopment. Carlson 1992 and Carlson 1996 demonstrated lower novelty preferences (possibly predictive of lower intelligence) in the supplemented compared with the control group. The investigators however concluded that supplemented infants may have more rapid visual information processing given that they had more looks and each look was of shorter duration. GROWTH Four out of thirteen studies reported benefits of LCPUFA on growth of supplemented infants at different postnatal ages. Two trials (Carlson 1992; Carlson 1996) suggested that LCPUFA supplemented infants grow less well than controls, possibly due to a reduction in AA levels that occurs when n-3 supplements are used without n-6 supplements. Recent trials with addition of AA to the supplement have reported no significant negative effect on growth. Fewtrell 2002 reported mild reductions in length and weight z scores at 18 months. Contrary to these results, meta-analysis of five studies (Uauy 1990; Carlson 1996; Hansen 1997; Vanderhoof 1999; Innis 2002) showed increased weight and length at two months post-term in supplemented infants. Meta-analysis of four studies at 12 months (N = 271) and two studies at 18 months (N = 396) post-term showed no significant effect of supplementation on weight, length or head circumference. SIDE EFFECTS Uauy 1992 reported no significant effect of LCPUFA supplementation on bleeding time and red cell membrane fragility. AUTHORS' CONCLUSIONS Infants enrolled in the trials were relatively mature and healthy preterm infants. Assessment schedule and methodology, dose and source of supplementation and fatty acid composition of the control formula varied between trials. When the results of the RCT's are pooled, no clear long-term benefits were demonstrated for infants receiving formula supplemented with LCPUFA. There was no evidence that supplementation of formula with n-3 and n-6 LCPUFA impaired the growth of preterm infants.
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Affiliation(s)
- K Simmer
- King Edward Memorial Hospital for Women and Princess Margaret Hospital for Children, Neonatal Clinical Care Unit, Bagot Road, Subiaco, WA, Australia 6008.
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