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Schuchardt JP, Beinhorn P, Hu XF, Chan HM, Roke K, Bernasconi A, Hahn A, Sala-Vila A, Stark KD, Harris WS. Omega-3 world map: 2024 update. Prog Lipid Res 2024; 95:101286. [PMID: 38879135 DOI: 10.1016/j.plipres.2024.101286] [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: 04/18/2024] [Revised: 05/31/2024] [Accepted: 06/05/2024] [Indexed: 07/06/2024]
Abstract
In 2016, the first worldwide n3 PUFA status map was published using the Omega-3 Index (O3I) as standard biomarker. The O3I is defined as the percentage of EPA + DHA in red blood cell (RBC) membrane FAs. The purpose of the present study was to update the 2016 map with new data. In order to be included, studies had to report O3I and/or blood EPA + DHA levels in metrics convertible into an estimated O3I, in samples drawn after 1999. To convert the non-RBC-based EPA + DHA metrics into RBC we used newly developed equations. Baseline data from clinical trials and observational studies were acceptable. A literature search identified 328 studies meeting inclusion criteria encompassing 342,864 subjects from 48 countries/regions. Weighted mean country O3I levels were categorized into very low ≤4%, low >4-6%, moderate >6-8%, and desirable >8%. We found that the O3I in most countries was low to very low. Notable differences between the current and 2016 map were 1) USA, Canada, Italy, Turkey, UK, Ireland and Greece (moving from the very low to low category); 2) France, Spain and New Zealand (low to moderate); and 3) Finland and Iceland (moderate to desirable). Countries such as Iran, Egypt, and India exhibited particularly poor O3I levels.
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Affiliation(s)
- Jan Philipp Schuchardt
- The Fatty Acid Research Institute, 5009 W. 12(th) St. Ste 5, Sioux Falls, SD 57106, United States; Institute of Food and One Health, Leibniz University Hannover, Am kleinen Felde 30, 30167 Hannover, Germany.
| | - Philine Beinhorn
- Institute of Food and One Health, Leibniz University Hannover, Am kleinen Felde 30, 30167 Hannover, Germany
| | - Xue Feng Hu
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Hing Man Chan
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Kaitlin Roke
- Global Organization for EPA and DHA Omega-3s (GOED), 222 South Main Street, Suite 500, Salt Lake City, UT 84101, United States
| | - Aldo Bernasconi
- Global Organization for EPA and DHA Omega-3s (GOED), 222 South Main Street, Suite 500, Salt Lake City, UT 84101, United States
| | - Andreas Hahn
- Institute of Food and One Health, Leibniz University Hannover, Am kleinen Felde 30, 30167 Hannover, Germany
| | - Aleix Sala-Vila
- The Fatty Acid Research Institute, 5009 W. 12(th) St. Ste 5, Sioux Falls, SD 57106, United States; Hospital del Mar Medical Research Institute, Dr. Aiguader 88, 08003 Barcelona, Spain
| | - Ken D Stark
- Department of Kinesiology and Health Sciences, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - William S Harris
- The Fatty Acid Research Institute, 5009 W. 12(th) St. Ste 5, Sioux Falls, SD 57106, United States; Department of Internal Medicine, Sanford School of Medicine, University of South Dakota, 1400 W. 22nd St., Sioux Falls, SD 57105, United States
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Different Metabolism and Toxicity of TRANS Fatty Acids, Elaidate and Vaccenate Compared to Cis-Oleate in HepG2 Cells. Int J Mol Sci 2022; 23:ijms23137298. [PMID: 35806300 PMCID: PMC9266973 DOI: 10.3390/ijms23137298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/25/2022] [Accepted: 06/28/2022] [Indexed: 01/27/2023] Open
Abstract
Trans fatty acids (TFAs) are not synthesized in the human body but are generally ingested in substantial amounts. The widespread view that TFAs, particularly those of industrial origin, are unhealthy and contribute to obesity, cardiovascular diseases and diabetes is based mostly on in vivo studies, and the underlying molecular mechanisms remain to be elucidated. Here, we used a hepatoma model of palmitate-induced lipotoxicity to compare the metabolism and effects of the representative industrial and ruminant TFAs, elaidate and vaccenate, respectively, with those of cis-oleate. Cellular FAs, triacylglycerols, diacylglycerols and ceramides were quantitated using chromatography, markers of stress and apoptosis were assessed at mRNA and protein levels, ultrastructural changes were examined by electron microscopy and viability was evaluated by MTT assay. While TFAs were just slightly more damaging than oleate when applied alone, they were remarkably less protective against palmitate toxicity in cotreatments. These differences correlated with their diverse incorporation into the accumulating diacylglycerols and ceramides. Our results provide in vitro evidence for the unfavorable metabolic features and potent stress-inducing character of TFAs in comparison with oleate. These findings strengthen the reasoning against dietary trans fat intake, and they can also help us better understand the molecular mechanisms of lipotoxicity.
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Halczy-Kowalik L, Drozd A, Stachowska E, Drozd R, Żabski T, Domagała W. Fatty acids distribution and content in oral squamous cell carcinoma tissue and its adjacent microenvironment. PLoS One 2019; 14:e0218246. [PMID: 31242216 PMCID: PMC6594603 DOI: 10.1371/journal.pone.0218246] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 05/29/2019] [Indexed: 12/25/2022] Open
Abstract
Squamous cell carcinoma of the oral cavity mucosa grows under conditions of poor oxygenation and nutrient scarcity. Reprogramming of lipid biosynthesis accompanies tumor growth, but the conditions under which it occurs are not fully understood. The fatty acid content of the serum, tumor tissue and adjacent tumor microenvironment was measured by gas chromatography in 30 patients with squamous cell carcinoma grade 1-3. Twenty-five fatty acids were identified; their frequencies and percentages in each of the environments were assessed. Nineteen of the twenty-five fatty acids were found in tumor tissue, tumor adjacent tissue and blood serum. Of them, 8 were found in all thirty patients. Percentages of C16:0 and C18:1n9 were highest in the tumor, C18:1n9 and C16:0 were highest in tumor adjacent tissue, and C16:0 and C18:0 were highest in blood serum. The frequencies and amounts of C22:1n13, C22:4n6, C22:5n3 and C24:1 in tumor adjacent tissues were higher than those in blood serum, independent of the tumor grade. The correlations between the amount of fatty acid and tumor grade were the strongest in tumor adjacent tissues. The correlations between particular fatty acids were most prevalent for grade 1+2 tumors and were strongest for grade 3 tumors. In the adjacent tumor microenvironment, lipogenesis was controlled by C22:6w3. In blood serum, C18:1trans11 limited the synthesis of long-chain fatty acids. Our research reveals intensive lipid changes in oral cavity SCC adjacent to the tumor microenvironment and blood serum of the patients. Increase in percentage of some of the FAs in the path: blood serum-tumor adjacent microenvironment-tumor, and it is dependent on tumor grade. This dependency is the most visible in the tumor adjacent environment.
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Affiliation(s)
- Ludmiła Halczy-Kowalik
- Clinic of Maxillofacial Surgery, Pomeranian Medical University, Szczecin, Poland
- * E-mail:
| | - Arleta Drozd
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Stachowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Szczecin, Poland
| | - Radosław Drozd
- Department of Immunology, Microbiology and Physiological Chemistry, West Pomeranian University of Technology, Szczecin, Poland
| | - Tomasz Żabski
- Clinic of Maxillofacial Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Wenancjusz Domagała
- Department of Pathomorphology, Pomeranian Medical University, Szczecin, Poland
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Ma WW, Zhao L, Yuan LH, Yu HL, Wang H, Gong XY, Wei F, Xiao R. Elaidic acid induces cell apoptosis through induction of ROS accumulation and endoplasmic reticulum stress in SH‑SY5Y cells. Mol Med Rep 2017; 16:9337-9346. [PMID: 29152653 PMCID: PMC5779995 DOI: 10.3892/mmr.2017.7830] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 06/26/2017] [Indexed: 01/09/2023] Open
Abstract
Elaidic acid, which is a major trans fatty acid, has been reported to be involved in neurotoxicity; however, the underlying molecular mechanisms underlying its neurotoxic effects remain largely unknown. Therefore, the present study aimed to investigate the potential mechanisms underlying elaidic acid‑induced neuronal damage in vitro. The SH‑SY5Y neuroblastoma cell line was used as a model in the present study. Following treatment of cells with various concentrations of elaidic acid or with vehicle for 24 h, cell viability was measured using the MTT assay. Mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) release were measured using flow cytometry. Cell apoptosis was measured by Annexin V‑fluorescein isothiocyanate/propidium iodide double staining, and cellular redox status was determined using ELISA analysis. Furthermore, western blotting was used to detect the protein expression levels of factors associated with oxidative damage and components of the endoplasmic reticulum (ER) stress/unfolded protein response (UPR) signaling pathways. The results demonstrated that elaidic acid treatment inhibited cell viability, elevated cell apoptosis and resulted in a loss of MMP. In addition, elaidic acid induced marked alterations in cellular redox status. Treatment with high doses of elaidic acid treatment also enhanced the release of ROS, and upregulated lipid peroxide and malondialdehyde levels; however, it reduced superoxide dismutase and glutathione peroxidase activities. Furthermore, elaidic acid resulted in upregulation of nuclear factor erythroid 2‑related factor 2 and downregulation of heme oxygenase 1, which are two key antioxidative factors. Elaidic acid treatment also induced or inhibited the expression of numerous ER stress/UPR‑associated molecules. It induced glucose‑regulated protein 78 (GRP78) expression, whereas the expression levels of activating transcription factor 4 (ATF4) and CCAAT/enhancer‑binding protein homologous protein (CHOP) were upregulated and then downregulated following treatment with various doses of elaidic acid. These results indicated that elaidic acid inhibited SH‑SY5Y cell growth and induced apoptosis by enhancing oxidative stress and activating the ER stress/UPR signaling pathway and the GRP78/ATF4/CHOP pathway.
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Affiliation(s)
- Wei-Wei Ma
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Lei Zhao
- Department of Molecular Physiology and Biophysics, Holden Comprehensive Cancer Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Lin-Hong Yuan
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Huan-Ling Yu
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Hui Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Xin-Yuan Gong
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Feng Wei
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
| | - Rong Xiao
- Department of Nutrition and Food Hygiene, School of Public Health, Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, P.R. China
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Wu J, Cho E, Giovannucci EL, Rosner BA, Sastry SM, Schaumberg DA, Willett WC. Dietary intake of α-linolenic acid and risk of age-related macular degeneration. Am J Clin Nutr 2017; 105:1483-1492. [PMID: 28468892 PMCID: PMC5445670 DOI: 10.3945/ajcn.116.143453] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 03/30/2017] [Indexed: 01/18/2023] Open
Abstract
Background: The relation between α-linolenic acid (ALA), a plant-derived omega-3 (n-3) fatty acid, and age-related macular degeneration (AMD) is unclear. European researchers reported that ≤40% of ALA can be present as trans forms.Objective: We aimed to evaluate the associations between intake of ALA and intermediate and advanced AMD.Design: Seventy-five thousand eight hundred eighty-nine women from the Nurses' Health Study and 38,961 men from Health Professionals Follow-Up Study were followed up from 1984 to 2012 and from 1986 to 2010, respectively. We assessed dietary intake by a validated food-frequency questionnaire at baseline and every 4 y thereafter. One thousand five hundred eighty-nine incident intermediate and 1356 advanced AMD cases (primarily neovascular AMD) were confirmed by medical record review.Results: The multivariable-adjusted HR for intermediate AMD comparing ALA intake at the top quintile to the bottom quintile was 1.28 (95% CI: 1.05, 1.56; P-trend = 0.01) in the analyses combining 2 cohorts. The HR in each cohort was in the positive direction but reached statistical significance only in the women. However, the positive association was apparent only in the pre-2002 era in each cohort and not afterward (P-time interaction = 0.003). ALA intake was not associated with advanced AMD in either time period. Using gas-liquid chromatography, we identified both cis ALA (mean ± SD: 0.13% ± 0.04%) and trans ALA isomers (0.05% ± 0.01%) in 395 erythrocyte samples collected in 1989-1990. In stepwise regression models, mayonnaise was the leading predictor of erythrocyte concentrations of cis ALA and one isomer of trans ALA. We also found trans ALA in mayonnaise samples.Conclusions: A high intake of ALA was associated with an increased risk of intermediate AMD before 2002 but not afterward. The period before 2002 coincides with the same time period when trans ALA was found in food and participants' blood; this finding deserves further study.
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Affiliation(s)
| | - Eunyoung Cho
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA;,Department of Dermatology, The Warren Alpert Medical School of Brown University, Providence, RI;,Department of Epidemiology, Brown School of Public Health, Providence, RI
| | - Edward L Giovannucci
- Departments of Nutrition,,Epidemiology, and,Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Bernard A Rosner
- Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA;,Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | | | - Debra A Schaumberg
- Epidemiology, and,Global Medical Affairs, Shire Pharmaceuticals, Lexington, MA;,Center for Translational Medicine, John A. Moran Eye Center, University of Utah School of Medicine, Salt Lake City, UT
| | - Walter C Willett
- Departments of Nutrition,,Epidemiology, and,Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
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Kakde S, Bhopal RS, Bhardwaj S, Misra A. Urbanized South Asians' susceptibility to coronary heart disease: The high-heat food preparation hypothesis. Nutrition 2016; 33:216-224. [PMID: 27776951 DOI: 10.1016/j.nut.2016.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/17/2016] [Accepted: 07/08/2016] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Known risk factors do not fully explain the comparatively high susceptibility to coronary heart disease (CHD) in South Asians (Indian, Pakistani, Bangladeshi, and Sri Lankan populations in South Asia and overseas). The search for explanatory hypotheses and cofactors that raise susceptibility of South Asians to CHD continues. The aim of this study was to propose "the high-heat food preparation hypothesis," where neo-formed contaminants (NFCs) such as trans-fatty acids (TFAs) and advanced glycation end-products (AGEs) are the cofactors. METHODS We reviewed the actions of AGEs and TFAs, the burden of these products in tissues and blood in South Asians, the relationship between these products and CHD, the effects of preparing food and reheating oils at high temperatures on NFCs, and the foods and mode of preparation in South Asian and Chinese cuisines. RESULTS Animal and human studies show NFCs increase the risk for CHD. Evidence on the consumption and body burden of these products across ethnic groups is not available, and comparable data on the NFC content of the cuisine of South Asians and potential comparison populations (e.g., the Chinese with lower CHD rates) are limited. South Asians' cuisine is dominated by frying and roasting techniques that use high temperatures. South Asian foods have high TFA content primarily through the use of partially hydrogenated fats, reheated oils, and high-heat cooking. Reheating oils greatly increases the TFA content. In comparison, Chinese cuisine involves mostly braising, steaming, and boiling rather than frying. CONCLUSION We hypothesize that South Asians' susceptibility to CHD is partly attributable to high-heat treated foods producing high NFCs. Research to accrue direct evidence is proposed.
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Affiliation(s)
- Smitha Kakde
- Edinburgh Migration, Ethnicity and Health Research Group, Centre for Population Health Sciences, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK
| | - Raj S Bhopal
- Edinburgh Migration, Ethnicity and Health Research Group, Centre for Population Health Sciences, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK.
| | - Swati Bhardwaj
- National Diabetes, Obesity and Cholesterol Diseases Foundation, SDA, New Delhi, India; Diabetes Foundation (India), SDA, New Delhi, India; Center of Nutrition & Metabolic Research (C-NET), Delhi, India
| | - Anoop Misra
- National Diabetes, Obesity and Cholesterol Diseases Foundation, SDA, New Delhi, India; Diabetes Foundation (India), SDA, New Delhi, India; Center of Nutrition & Metabolic Research (C-NET), Delhi, India; Fortis C-DOC Center for Excellence for Diabetes, Metabolic Diseases and Endocrinology, New Delhi, India
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