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Yuen Jr JSK, Saad MK, Xiang N, Barrick BM, DiCindio H, Li C, Zhang SW, Rittenberg M, Lew ET, Zhang KL, Leung G, Pietropinto JA, Kaplan DL. Aggregating in vitro-grown adipocytes to produce macroscale cell-cultured fat tissue with tunable lipid compositions for food applications. eLife 2023; 12:e82120. [PMID: 37014056 PMCID: PMC10072877 DOI: 10.7554/elife.82120] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 03/06/2023] [Indexed: 04/05/2023] Open
Abstract
We present a method of producing bulk cell-cultured fat tissue for food applications. Mass transport limitations (nutrients, oxygen, waste diffusion) of macroscale 3D tissue culture are circumvented by initially culturing murine or porcine adipocytes in 2D, after which bulk fat tissue is produced by mechanically harvesting and aggregating the lipid-filled adipocytes into 3D constructs using alginate or transglutaminase binders. The 3D fat tissues were visually similar to fat tissue harvested from animals, with matching textures based on uniaxial compression tests. The mechanical properties of cultured fat tissues were based on binder choice and concentration, and changes in the fatty acid compositions of cellular triacylglyceride and phospholipids were observed after lipid supplementation (soybean oil) during in vitro culture. This approach of aggregating individual adipocytes into a bulk 3D tissue provides a scalable and versatile strategy to produce cultured fat tissue for food-related applications, thereby addressing a key obstacle in cultivated meat production.
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Affiliation(s)
- John Se Kit Yuen Jr
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Michael K Saad
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Ning Xiang
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Brigid M Barrick
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Hailey DiCindio
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Chunmei Li
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Sabrina W Zhang
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | | | - Emily T Lew
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Kevin Lin Zhang
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Glenn Leung
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - Jaymie A Pietropinto
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
| | - David L Kaplan
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts UniversityMedfordUnited States
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2
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Quaranta A, Revol-Cavalier J, Wheelock CE. The octadecanoids: an emerging class of lipid mediators. Biochem Soc Trans 2022; 50:1569-1582. [PMID: 36454542 PMCID: PMC9788390 DOI: 10.1042/bst20210644] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/11/2022] [Accepted: 10/24/2022] [Indexed: 10/27/2023]
Abstract
Oxylipins are enzymatic and non-enzymatic metabolites of mono- or polyunsaturated fatty acids that encompass potent lipid mediators including the eicosanoids and docosanoids. Previously considered of low interest and often dismissed as 'just fat', octadecanoid oxylipins have only recently begun to be recognized as lipid mediators in humans. In the last few years, these compounds have been found to be involved in the mediation of multiple biological processes related to nociception, tissue modulation, cell proliferation, metabolic regulation, inflammation, and immune regulation. At the same time, the study of octadecanoids is hampered by a lack of standardization in the field, a paucity of analytical standards, and a lack of domain expertise. These issues have collectively limited the investigation of the biosynthesis and bioactivity of octadecanoids. Here, we present an overview of the primary enzymatic pathways for the oxidative metabolism of 18-carbon fatty acids in humans and of the current knowledge of the major biological activity of the resulting octadecanoids. We also propose a systematic nomenclature system based upon that used for the eicosanoids in order to avoid ambiguities and resolve multiple designations for the same octadecanoid. The aim of this review is to provide an initial framework for the field and to assist in its standardization as well as to increase awareness of this class of compounds in order to stimulate research into this interesting group of lipid mediators.
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Affiliation(s)
- Alessandro Quaranta
- Unit of Integrative Metabolomics, Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Johanna Revol-Cavalier
- Unit of Integrative Metabolomics, Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
- Larodan Research Laboratory, Karolinska Institutet, 171 65 Stockholm, Sweden
| | - Craig E. Wheelock
- Unit of Integrative Metabolomics, Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
- Department of Respiratory Medicine and Allergy, Karolinska University Hospital, 171 76 Stockholm, Sweden
- Gunma University Initiative for Advanced Research (GIAR), Gunma University, Maebashi, Gunma 371-8511, Japan
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3
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Affiliation(s)
- Harald S Hansen
- From the Department of Drug Design and Pharmacology, University of Copenhagen, Jagtvej 160, Copenhagen 2100, Denmark
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4
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A Maternal Two-meal Feeding Sequence with Varying Crude Protein Affects Milk Lipid Profile in A Sow-Piglet Model. Sci Rep 2017; 7:13742. [PMID: 29062061 PMCID: PMC5653795 DOI: 10.1038/s41598-017-14188-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 10/04/2017] [Indexed: 12/02/2022] Open
Abstract
The effects of a two-meal feeding sequence on production performance and milk lipid profile were investigated. Sixty pregnant sows (d 85 of gestation) were assigned to 3 groups: 2 C group (fed a control crude protein [CP] diet at 0600 and 1500 daily), LH group (fed a low CP diet and a high CP diet at 0600 and 1500), or HL group (fed a high CP diet and a low CP diet at 0600 and 1500). Reproductive performance of sows, and lipid profiles of plasma and milk were measured. Results showed that the HL feeding sequence dramatically increased average piglet weight/litter, average daily gain of piglet/litter, and milk production of sows. LH feeding sequence increased milk fat proportion, and HL feeding sequence significantly increased the proportion of milk MUFA on d 14 and 21 of lactation. Interestingly, the HL feeding sequence also reduced the ratio of C18:1cis/C18:1trans in milk, which may account for the greater milk production of sows and growth performance of piglets during lactation. These findings indicated that both the maternal two-meal feeding sequences with varying crude protein improved milk production and milk lipid profiles of sows, which might contribute to improving growth performance of piglets.
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Chiba T, Thomas CP, Calcutt MW, Boeglin WE, O'Donnell VB, Brash AR. The Precise Structures and Stereochemistry of Trihydroxy-linoleates Esterified in Human and Porcine Epidermis and Their Significance in Skin Barrier Function: IMPLICATION OF AN EPOXIDE HYDROLASE IN THE TRANSFORMATIONS OF LINOLEATE. J Biol Chem 2016; 291:14540-54. [PMID: 27151221 PMCID: PMC4938176 DOI: 10.1074/jbc.m115.711267] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Indexed: 12/02/2022] Open
Abstract
Creation of an intact skin water barrier, a prerequisite for life on dry land,
requires the lipoxygenase-catalyzed oxidation of the essential fatty acid linoleate,
which is esterified to the ω-hydroxyl of an epidermis-specific ceramide.
Oxidation of the linoleate moiety by lipoxygenases is proposed to facilitate
enzymatic cleavage of the ester bond, releasing free ω-hydroxyceramide for
covalent binding to protein, thus forming the corneocyte lipid envelope, a key
component of the epidermal barrier. Herein, we report the transformations of
esterified linoleate proceed beyond the initial steps of oxidation and epoxyalcohol
synthesis catalyzed by the consecutive actions of 12R-LOX and
epidermal LOX3. The major end product in human and porcine epidermis is a trihydroxy
derivative, formed with a specificity that implicates participation of an epoxide
hydrolase in converting epoxyalcohol to triol. Of the 16 possible triols arising from
hydrolysis of 9,10-epoxy-13-hydroxy-octadecenoates, using LC-MS and chiral analyses,
we identify and quantify specifically
9R,10S,13R-trihydroxy-11E-octadecenoate
as the single major triol esterified in porcine epidermis and the same isomer with
lesser amounts of its 10R diastereomer in human epidermis. The
9R,10S,13R-triol is formed by
SN2 hydrolysis of the
9R,10R-epoxy-13R-hydroxy-octadecenoate
product of the LOX enzymes, a reaction specificity characteristic of epoxide
hydrolase. The high polarity of triol over the primary linoleate products enhances
the concept that the oxidations disrupt corneocyte membrane lipids, promoting release
of free ω-hydroxyceramide for covalent binding to protein and sealing of the
waterproof barrier.
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Affiliation(s)
| | - Christopher P Thomas
- the Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff CF14 4XN, Wales, United Kingdom
| | - M Wade Calcutt
- Biochemistry and the Vanderbilt Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 and
| | | | - Valerie B O'Donnell
- the Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff CF14 4XN, Wales, United Kingdom
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Muñoz-Garcia A, Thomas CP, Keeney DS, Zheng Y, Brash AR. The importance of the lipoxygenase-hepoxilin pathway in the mammalian epidermal barrier. BIOCHIMICA ET BIOPHYSICA ACTA 2014; 1841:401-8. [PMID: 24021977 PMCID: PMC4116325 DOI: 10.1016/j.bbalip.2013.08.020] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 08/27/2013] [Accepted: 08/30/2013] [Indexed: 01/22/2023]
Abstract
This review covers the background to discovery of the two key lipoxygenases (LOX) involved in epidermal barrier function, 12R-LOX and eLOX3, and our current views on their functioning. In the outer epidermis, their consecutive actions oxidize linoleic acid esterified in ω-hydroxy-ceramide to a hepoxilin-related derivative. The relevant background to hepoxilin and trioxilin biochemistry is briefly reviewed. We outline the evidence that linoleate in the ceramide is the natural substrate of the two LOX enzymes and our proposal for its importance in construction of the epidermal water barrier. Our hypothesis is that the oxidation promotes hydrolysis of the oxidized linoleate moiety from the ceramide. The resulting free ω-hydroxyl of the ω-hydroxyceramide is covalently bound to proteins on the surface of the corneocytes to form the corneocyte lipid envelope, a key barrier component. Understanding the role of the LOX enzymes and their hepoxilin products should provide rational approaches to ameliorative therapy for a number of the congenital ichthyoses involving compromised barrier function. This article is part of a Special Issue entitled The Important Role of Lipids in the Epidermis and their Role in the Formation and Maintenance of the Cutaneous Barrier. Guest Editors: Kenneth R. Feingold and Peter Elias.
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Affiliation(s)
- Agustí Muñoz-Garcia
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Christopher P Thomas
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Diane S Keeney
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yuxiang Zheng
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Alan R Brash
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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7
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Lauritzen L, Carlson SE. Maternal fatty acid status during pregnancy and lactation and relation to newborn and infant status. MATERNAL & CHILD NUTRITION 2011; 7 Suppl 2:41-58. [PMID: 21366866 PMCID: PMC6860497 DOI: 10.1111/j.1740-8709.2011.00303.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The present review of determinants of infant fatty acid status was undertaken as part of a conference on 'Fatty acid status in early life in low-income countries: determinants and consequences'. Emphasis is placed on the essential fatty acids, and particularly the physiologically important long chain polyunsaturated fatty acids (LCPUFAs) of 20 and 22 carbons. We are unaware of any studies of determinants of infant fatty acid status in populations with a cultural dietary pattern with low amounts of linoleic acid (LA, 18:2n-6) and α-linolenic acid (ALA,18:3n-3). Many reports suggest that there may be adverse health effects related to the increased proportion of LA in relation to ALA, which have occurred worldwide due to the increased availability of vegetable oils high in LA. The issue of dietary n-6 to n-3 balance may apply to infant fatty acid status both during fetal and post-natal life; however, this review focuses on the n-3 and n-6 LCPUFA, in particular, docosahexaenoic acid (DHA, 22:6n-3) and arachidonic acid (AA, 20:4n-6), which are the predominant n-3 and n-6 LCPUFA found in cell membranes. The evidence that these fatty acids are preferentially transferred from maternal to fetal circulation across the placenta, and the sources and mechanisms for this transfer, are reviewed. We also address the sources of DHA and AA for the newborn including human milk DHA and AA and the factors that influence maternal DHA status and consequently the amount of DHA available for transfer to the fetus and infant via human milk.
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Affiliation(s)
- Lotte Lauritzen
- Department of Human Nutrition, Faculty of Life Sciences, University of Copenhagen, Rolighedsvej 30, Frederiksberg, Denmark.
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8
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Maccarrone M, Gasperi V, Catani MV, Diep TA, Dainese E, Hansen HS, Avigliano L. The Endocannabinoid System and Its Relevance for Nutrition. Annu Rev Nutr 2010; 30:423-40. [DOI: 10.1146/annurev.nutr.012809.104701] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mauro Maccarrone
- Department of Biomedical Sciences, University of Teramo, Teramo, Italy; ,
- European Center for Brain Research (CERC)/Santa Lucia Foundation, Rome, Italy
| | - Valeria Gasperi
- Department of Experimental Medicine and Biochemical Sciences, University of Rome, Tor Vergata, Rome, Italy; , ,
| | - Maria Valeria Catani
- Department of Experimental Medicine and Biochemical Sciences, University of Rome, Tor Vergata, Rome, Italy; , ,
| | - Thi Ai Diep
- Department of Pharmacology and Pharmacotherapy, Faculty of Pharmaceutical Sciences, University of Copenhagen, Copenhagen, Denmark; ,
| | - Enrico Dainese
- Department of Biomedical Sciences, University of Teramo, Teramo, Italy; ,
| | - Harald S. Hansen
- Department of Pharmacology and Pharmacotherapy, Faculty of Pharmaceutical Sciences, University of Copenhagen, Copenhagen, Denmark; ,
| | - Luciana Avigliano
- Department of Experimental Medicine and Biochemical Sciences, University of Rome, Tor Vergata, Rome, Italy; , ,
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9
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Ramadan M, Afify Amer M, El-Saadany S, Abd El-Fatah El-Masry R, El-Said Awad A. Changes in Lipid Profile by Vegetable Oil Blends Rich in Polyunsaturated Fatty Acids in Rats with Hypercholesterolemia. FOOD SCI TECHNOL INT 2009. [DOI: 10.1177/1082013208105167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The objective of this study was to investigate the effect of different blended vegetable oils having different levels and profiles of polyunsaturated fatty acids (PUFA) on hypercholesterolemia by analyzing the changes in lipid profile in high-cholesterol diet fed rats. Three vegetable oils (soy oil, sunflower oil, and the nonconventional flaxseed oil) were blended to obtain blends rich in PUFA. Thirty albino rats were used over the 2-month period. The animals were divided into five groups, wherein group 5 represents negative control, where rats were fed basal diet, while rats in group 4 received high cholesterol diet and served as positive controls. The other three groups were fed hypercholesterolemic diet (1% cholesterol + 0.25% colic acid) supplemented with blended oils. Generally, rats fed blended oils showed significantly lower levels of total cholesterol (TC), triacylglycerol (TG), and low-density lipoprotein (LDL) cholesterol as well as higher levels of high-density lipoprotein (HDL) cholesterol, in comparison with animals fed high-cholesterol diet and cholesterol-free diet. Thus, oil blends under study may be useful formulations for the treatment of hypercholesterolemia. In addition to improving the lipid profile by lowering TC, total TG, and total LDL and increasing HDL, blending of vegetable oils can result in an economic advantage of lower prices.
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Affiliation(s)
- M.F. Ramadan
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt,
| | - M.M. Afify Amer
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - S.S. El-Saadany
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | | | - A. El-Said Awad
- Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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10
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Abstract
The endocannabinoids anandamide (AEA) and 2-arachidonoylglycerol (2-AG) are bioactive lipids derived from the n-6 family of polyunsaturated fatty acids that are essential fatty acids. Symptoms of essential fatty acid deficiency in rats - growth retardation, scaly skin, and increased transepidermal water loss - can mainly be attributed to lack of linoleic acid as a structural element of the epidermis. Arachidonic acid, however, also serve essential functions, particularly in cellular signalling via its precursor role for numerous oxygenated derivatives such as prostaglandins, leukotrienes, hepoxilins and other eicosanoids. Furthermore, arachidonic acid is also a structural part of endocannabinoids that have signalling functions in relation to modulation of neurotransmitter release, which might involve physiological and pathophysiological phenomena such as regulation of appetite, energy metabolism, pain perception, memory and learning. Furthermore, along with AEA formation other acylethanolamides are always formed - e.g., oleoylethanolamide (OEA), that can inhibit food intake, and palmitoylethanolamide, that is anti-inflammatory - possibly through activation of peroxisome proliferator activated receptor alpha (PPAR alpha) and/or GPR119. As all these unsaturated fatty acids are ingested daily in smaller or larger amounts, one can ask whether different dietary fats can affect the levels of these fatty acids in the tissues and thereby the quantitative formation of these bioactive signalling molecules. Generally, in vivo arachidonic-acid-derived eicosanoid production can be increased and decreased by prolonged feeding with pharmacological levels of arachidonic acid and long-chain (n-3) fatty acids (fish oil), respectively. Changes in levels of these two fatty acids within the traditional human diet hardly affects the eicosanoid production, however. Moreover, preliminary data suggest that dietary intake of arachidonic acid and fish oil also doesn't easily affect endocannabinoid formation; however, dietary fat in terms of saturated, polyunsaturated and monounsaturated seems to affect tissue levels of AEA, 2-AG and OEA.
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Affiliation(s)
- H S Hansen
- Department of Pharmacology & Pharmacotherapy, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken, Copenhagen, Denmark.
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Utlu N, Celebi S. Effect of Different Fat Sources on Some Enzyme Activities in Laying Hens. JOURNAL OF APPLIED ANIMAL RESEARCH 2003. [DOI: 10.1080/09712119.2003.9706451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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13
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Hamanaka S, Hara M, Nishio H, Otsuka F, Suzuki A, Uchida Y. Human epidermal glucosylceramides are major precursors of stratum corneum ceramides. J Invest Dermatol 2002; 119:416-23. [PMID: 12190865 DOI: 10.1046/j.1523-1747.2002.01836.x] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Ceramides are the major component of the stratum corneum, accounting for 30%-40% of stratum corneum lipids by weight, and are composed of at least seven molecular groups (designated ceramides 1-7). Stratum corneum ceramides, together with cholesterol and fatty acids, form extracellular lamellae that are responsible for the epidermal permeability barrier. Previous studies indicated that beta-glucocerebrosidase- and sphingomyelinase-dependent ceramide production from glucosylceramides and sphingomyelins, respectively, is important for epidermal permeability barrier homeostasis. A recent study indicated that sphingomyelins are precursors of two stratum corneum ceramide molecular groups (ceramides 2 and 5). In this study, we have examined the role of glucosylceramides in the generation of each of the seven stratum corneum ceramide molecular groups. First, the structures of various glucosylceramide species in human epidermis were determined by gas chromatography-mass spectrometry, fast atom bombardment-mass spectrometry, and nuclear magnetic resonance. The results indicate that total epidermal glucosylceramides are composed of six distinct molecular groups, glucosylceramides 1-6. Glucosylceramide 1 contains sphingenine and nonhydroxy fatty acids, glucosylceramide 2, phytosphingosine and nonhydroxy fatty acids, glucosylceramide 3, phytosphingosine with one double bond and nonhydroxy fatty acids, glucosylceramide 4, sphingenine and alpha-hydroxy fatty acids, glucosylceramide 5, phytosphingosine and alpha-hydroxy fatty acids, and glucosylceramide 6, phytosphingosine with one double bond and alpha-hydroxy fatty acids. The nonhydroxy fatty acids typically have 16-24-carbon-length chains, whereas alpha-hydroxy fatty acids are limited to 24-, 25-, and 26-carbon chains. The sphingosine bases are C18 or C20 chains. Next, acylglucosylceramides and glucosylceramides were treated with beta-glucocerebrosidase and the ceramides released were compared with stratum corneum ceramides. Ceramide moieties of acylglucosylceramides and glucosylceramides 1, 2, 4-6 correspond to stratum corneum ceramides 1-7. These results, together with those of our previous reports characterizing epidermal sphingomyelins, indicate that all ceramide species, including omega-hydroxy fatty-acid-containing ceramides, are derived from glucosylceramides, and fractions of ceramides 2 and 5 are from sphingomyelins. Furthermore, structural analysis of glucosylceramides revealed that human epidermal glycosphingolipids display a unique lipid profile that is rich in very long chain hydroxylated (alpha- and omega-hydroxy) fatty acids and phytosphingosine.
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Affiliation(s)
- Sumiko Hamanaka
- Sphingolipid Expression Laboratory, Supra-Biomolecular System Research, RIKEN Frontier Research System, Wako, Japan
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14
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Abstract
Four new findings of the biochemistry and biology of the essential n-6 and n-3 fatty acids have recently been demonstrated. These findings will augment current knowledge as to the role of the essential fatty acids in human health.
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Affiliation(s)
- H S Hansen
- Department of Biological Sciences, Royal Danish School of Pharmacy, Copenhagen
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15
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Phinney SD, Clarke SD, Odin RS, Moldawer LL, Blackburn GL, Bistrian BR. Thermogenesis secondary to transdermal water loss causes growth retardation in essential fatty acid-deficient rats. Metabolism 1993; 42:1022-6. [PMID: 8345806 DOI: 10.1016/0026-0495(93)90017-i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Manifestations of essential fatty acid (EFA) deficiency in rats include growth retardation and increased transdermal water loss. The extra metabolic energy requirement could be caused by greater evaporative water loss from the skin surface. To test this hypothesis, 38 weanling rats were randomly assigned to one of two environments, control (CE) at 20 degrees C and 40% humidity or warm/humid (WHE) at 30 degrees C and 90% humidity. Half of the 20 CE rats were fed an EFA-adequate diet and the other 10 an EFA-deficient diet; the 18 WHE rats were also equally partitioned to the two diets. CE and WHE animals were independently group-fed to maintain equal energy intakes within each environment. Weight gain at 90 days was lower for CE EFA-deficient rats than for CE EFA-adequate rats (P < .0001). Growth rates in the WHE to 140 days did not differ. Mean weights at 90 days were as follows: CE EFA-adequate, 196 g; CE EFA-deficient, 148 g; WHE EFA-adequate, 148 g; WHE EFA-deficient, 135 g. In both CE and WHE animals, the triene/tetraene ratio of both serum and liver phospholipids (PL) was 100-fold greater for EFA-deficient versus EFA-adequate diets. PL fatty acids of liver in CE and WHE EFA-deficient rats contained 2.09 and 1.92 micrograms of 20:3 omega 9 per micrograms phosphorus (Pi), respectively, compared with 0.03 and 0.02 microgram 20:3 omega 9/micrograms Pi in CE and WHE EFA-adequate rats. These results indicate equivalent degrees of EFA deficiency in the two environments.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S D Phinney
- Cancer Research Institute, New England Deaconess Hospital, Boston, MA
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17
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Hamanaka S, Takemoto T, Hamanaka Y, Asagami C, Suzuki M, Suzuki A, Otsuka F. Structure determination of glycosphingolipids of cultured human keratinocytes. BIOCHIMICA ET BIOPHYSICA ACTA 1993; 1167:1-8. [PMID: 8461327 DOI: 10.1016/0005-2760(93)90209-r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
From cultured human keratinocytes, seven glycolipid fractions were isolated by DEAE and silica-gel column chromatographies, and further by HPLC on a silica-gel column. By means of 1H-NMR spectroscopy, fast atom bombardment mass spectrometry and GLC-mass spectrometry, one fraction was determined to contain acylglucosylceramides, which consist of amide linked omega-hydroxy fatty acids (C30:0, C30:1, C32:1 and C34:1), fatty acids linked to the omega-hydroxy fatty acids through ester linkages (C14:1, C16:1, C18:1 and C18:2), a long-chain base (d18-sphingenine), and beta-glucose. Five of the other fractions contained glucosylceramides, and the seventh fraction contained a mixture of glucosylceramides and galactosylceramides. Glucosylceramides containing long-chain omega-hydroxy fatty acids, which are assumed to be immediate precursors of the acylglucosylceramides, were hardly detected in these glycolipid fractions. Six glucosylceramide fractions were separated due to differences in their fatty acids and sphingosines. On comparison with the results reported in our previous paper, the acylglucosylceramide content of the cultured human keratinocytes was about half that of human epidermis. Under the culture conditions used, the human keratinocytes did not differentiate into granular or horny cells. Taken together, the results suggest that the synthesis of acylglucosylceramides is not activated much in the cultured keratinocytes, but would be more activated in differentiated cells.
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Affiliation(s)
- S Hamanaka
- Department of Dermatology, Yamaguchi Rosai Hospital, Japan
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18
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Mikkelsen L, Hansen HS, Grunnet N, Dich J. Inhibition of fatty acid synthesis in rat hepatocytes by exogenous polyunsaturated fatty acids is caused by lipid peroxidation. BIOCHIMICA ET BIOPHYSICA ACTA 1993; 1166:99-104. [PMID: 8431498 DOI: 10.1016/0005-2760(93)90289-l] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Rat hepatocyte long-term cultures were utilized to investigate the impact of different polyunsaturated fatty acids (PUFA) on the insulin-induced de novo fatty acid synthesis in vitro. The addition of 0.5 mM albumin-complexed oleic, linoleic, columbinic, arachidonic, eicosapentaenoic or docosahexaenoic acid resulted in a marked suppression of fatty acid synthesis. By evaluation of cell viability (determined as the leakage of lactate dehydrogenase (LDH) it turned out, that the antioxidant used (50 microM alpha-tocopherol phosphate) had a low antioxidant activity, resulting in cytotoxic effects by the peroxidized PUFA. Arachidonic acid and eicosapentaenoic acid showed a dose- and time-dependent cytotoxicity. Two other antioxidants: 50 microM alpha-tocopherol acid succinate and 1 microM N,N'-diphenyl-1,4-phenylenediamine, both proved more efficient than alpha-tocopherol phosphate. There was a significant correlation between LDH-leakage and inhibition of fatty acid synthesis. Lipid peroxidation, measured as thiobarbituric acid-reactive substances, also showed a significant correlation with the degree of inhibition of fatty acid synthesis. Furthermore, PUFA had no inhibitory effect on fatty acid synthesis when peroxidation was minimized by the use of proper antioxidants. These data indicate that PUFA in vitro inhibit the insulin-induced de novo fatty acid synthesis in hepatocytes from starved rats, due to cytotoxic effects caused by lipid peroxidation.
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Affiliation(s)
- L Mikkelsen
- Department of Biological Sciences, Royal Danish School of Pharmacy, Copenhagen
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19
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Nettleton JA. Are n-3 fatty acids essential nutrients for fetal and infant development? JOURNAL OF THE AMERICAN DIETETIC ASSOCIATION 1993; 93:58-64. [PMID: 8417094 DOI: 10.1016/0002-8223(93)92132-h] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Recent research indicates that n-3 fatty acids (FAs) are essential nutrients in early human development. In human infants, nonhuman primates, and animal models, the n-3 FA, docosahexaenoic acid (DHA, 22:6n-3) is highly concentrated in brain and retinal tissues and accumulates during late fetal and early neonatal life. Diets deficient in n-3 FAs are associated with reduced levels of DHA in erythrocytes and brain and retinal tissues and with abnormalities in retinal function that may be irreversible. The precursor of DHA, alpha-linolenic acid (LNA, 18:3n-3), may be an inadequate substitute for DHA because LNA may not be converted to DHA in sufficient amounts to meet an infant's needs. Premature infants lose DHA from their tissues unless they are fed human milk or formula supplemented with DHA. Fish and shellfish are the main food sources of DHA. Women who consume fish have more DHA in their breast milk than do those who do not eat seafood. Infant formulas contain only LNA as a source of n-3 FAs. Pregnant and nursing women should be encouraged to consume seafood on a regular basis during pregnancy and lactation to furnish DHA for their infants.
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Affiliation(s)
- J A Nettleton
- Office of Scientific Public Affairs, Institute of Food Technologists, Chicago, IL 60601
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20
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Schurer NY, Elias PM. The biochemistry and function of stratum corneum lipids. ADVANCES IN LIPID RESEARCH 1991; 24:27-56. [PMID: 1763715 DOI: 10.1016/b978-0-12-024924-4.50006-7] [Citation(s) in RCA: 174] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- N Y Schurer
- Department of Dermatology, Heinrich-Heine Universitat Dusseldorf, Germany
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21
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Affiliation(s)
- M L Williams
- Department of Dermatology, University of California, San Francisco 94143
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22
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del Hoyo N, Pulido JA, Carretero MT, Pérez-Albarsanz MA. Comparison of linoleate, palmitate and acetate metabolism in rat ventral prostate. Biosci Rep 1990; 10:105-12. [PMID: 2111190 DOI: 10.1007/bf01116858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Rat ventral prostate incorporated (1-14C)acetate, (1-14C)palmitate and (1-14C)linoleate into different phospholipids in a time-dependent process. The rate of incorporation into total phospholipids was higher with linoleate (10.0 nmol/g) than with either palmitate (5.8 nmol/g) or acetate (4.7 nmol/g). Predominant labelling with all the radioactive substrates assayed was found in choline glycerophospholipids (PC). The radioactive profiles for linoleate in the other ventral prostate phospholipids differed from those obtained with palmitate and acetate. Specifically linoleate was incorporated into inositol glycerophospholipids plus lysoethanolamine glycerophospholipids (PI + LPE) and not into sphingomyelin (SM), while palmitate and acetate incorporated into SM but not into PI + LPE. Acetate showed the highest oxidation to CO2 whereas no differences were observed in the radioactivity incorporated into CO2 from a saturated (palmitate) or an essential unsaturated fatty acid (linoleate). These studies also show zinc-dependence by the acetate to CO2 oxidation.
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Affiliation(s)
- N del Hoyo
- Departamento de Bioquímica y Biología Molecular, Universidad de Alcalá, Madrid, Spain
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23
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Karmiol S, Bettger WJ. The Na+K+ATPase activity in cultured human fibroblasts with an elevated phospholipid triene:tetraene ratio. Lipids 1990; 25:73-7. [PMID: 2158611 DOI: 10.1007/bf02562207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Human skin fibroblasts were cultured at low density for 11 days in MCDB 110, 0.4% fetal bovine serum, a mitogen mixture, and were supplemented with 18:2n-6 or 18:1n-9 as a fatty acid-albumin complex. The cells cultured with the 18:2n-6 supplement had a 20:3n-9/20:4n-6 ratio of 0.29 +/- 0.07; the 18:1n-9 supplemented cells had a ratio of 1.51 +/- 0.27. There was less than 4% difference in total growth of the cell population under the two culture conditions. The cells supplemented with 18:2n-9 had similar levels of protein/cell, K+/mg cell protein and functional Na+K+ATPase activity.
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Affiliation(s)
- S Karmiol
- Department of Nutritional Sciences, College of Biological Science, University of Guelph, Ontario, Canada
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Hanis T, Zidek V, Sachova J, Klir P, Deyl Z. Effects of dietary trans-fatty acids on reproductive performance of Wistar rats. Br J Nutr 1989; 61:519-29. [PMID: 2758008 DOI: 10.1079/bjn19890140] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
1. Wistar rats were fed for three successive generations on a semi-purified diet, in which the fat was provided by butter, sunflower oil, rapeseed oil or hydrogenated vegetable fat, differing in the content of cis,cis-18:2 and trans-18:1 fatty acids. Effects of these fats on the composition of adipose tissue and reproductive performance were studied. Fatty acids were analysed using high-performance liquid chromatography. 2. The fatty acid pattern of adipose tissue was closely related to dietary fat composition and, established in the first generation, did not change significantly in successive generations of rats. 3. Hydrogenated fat adversely affected litter size, sperm morphology and regularity of oestrous cycle, and prolonged the period of gestation in experimental animals. Differences observed between the generations were not significant. 4. Hydrogenated fat decreased the level of serum testosterone in males, but the differences observed in levels of serum progesterone in females were not apparently related to the dietary trans-fatty acids.
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Affiliation(s)
- T Hanis
- Institute of Physiology, Czechoslovak Academy of Sciences, Prague
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Chaud M, Franchi AM, Gimeno MF, Gimeno AL. Gamma-linolenic acid improves the constancy of contractions in uteri from sprayed rats and is metabolized to prostaglandin E1 but not to bisenoic prostanoids. PROSTAGLANDINS 1988; 35:95-106. [PMID: 2836889 DOI: 10.1016/0090-6980(88)90277-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The effects of gamma-linolenic acid (GLA) on the time-dependent constancy of spontaneous contractions (isometric developed tension = IDT and frequency of contractions = FC) in uterine strips isolated from spayed rats, were explored. Moreover, the influence of the unsaturated fatty acid on the basal generation and release of tissue prostaglandins (PGs) as well as the conversion of labelled GLA into prostanoids by the uterine tissue and the effects of p-bromo-phenacyl-bromide (BPB), were also studied. GLA (10(-7)M), attenuated significantly the spontaneous decrement of contractile constancy exhibited by control preparations during a period of 180 min of activity in isolation, whereas BPB (10(5) M) resulted in an augmented and faster decrement of inotropic constancy. Spontaneous changes in the constancy of uterine motility as time progressed involved similarly both IDT and FC. After 180 min of activity in isolation a basal generation and release of PGs E and F of the series 1 and 2, were detected. The challenge with 10(-7) M GLA (delivered immediately after isolation) enhanced significantly the output of PGE1 but did not influence the generation and release of PGE2 or PGF2 alpha. BPB (10(-5) M) had no significant effect on the basal output of PGE1, PGE2 or PGF2 but completely prevented the enhancing action of GLA on the synthesis and release of PGE1. Labelled GLA was mainly converted to PGE1 by rat uterine segments and negligible counts in the 2-series of prostanoids, were observed. In presence of BPB (10(-5) M) the conversion of 1-14C-GLA, to PGE1 was almost completely abolished. The foregoing evidences suggest that exogenous GLA is metabolized by the spayed rat uterus via an elongase, forming di-homogamma-linolenic acid (DHLA), which in turn is substrate for cyclo-oxygenase peroxidase reactions yielding finally PGE1. No evidence of a delta 5-desaturase activity, converting DHLA into arachidonate and further derivatives, was detected. Coincidently, exogenous GLA was able to support a better contractile constancy as a function of time than that evidenced in untreated uterine strips isolated from castrated rats.
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Affiliation(s)
- M Chaud
- Centro de Estudios Farmacológicos, Principios Naturales (CEFAPRIN), Buenos Aires, Argentina
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26
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Affiliation(s)
- F L Hoch
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor 48109
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Cook HW, Spence MW. Studies of the modulation of essential fatty acid metabolism by fatty acids in cultured neuroblastoma and glioma cells. BIOCHIMICA ET BIOPHYSICA ACTA 1987; 918:217-29. [PMID: 3105586 DOI: 10.1016/0005-2760(87)90224-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In cultured neuroblastoma cells (N1E-115), the metabolism of the essential fatty acid, linoleic acid (18:2 (n-6)), to arachidonic acid (20:4(n-6)) can be altered by other fatty acids in a manner supporting a concerted action of the modulating fatty acid on the desaturation and chain elongation enzymes. In further examination of mechanisms involved, cultured glioma (C-6) or neuroblastoma-glioma hybrids (NG-108-15) cells showed similar patterns of activation by some fatty acids (e.g., 20:3(n-6) and 20:4(n-6)), and inhibition (e.g., 18:3(n-3) or 22:6(n-3)) or no effect (e.g., 18:1(n-9), 20:3(n-3)) by others. In contrast, only inhibition by 20:4(n-6) was seen in cultured HeLa cells, suggesting that the intracellular interactions may not be universal in all cell lines. For fatty acids that activate 20:4(n-6) formation, the lag observed when substrate and activator were administered simultaneously was eliminated by preincubation with activator. Maximal activation occurred within 4 h for neuroblastoma and 2 h for glioma; in each cell line activation declined steadily for 10 h after removal of the activator. Inhibition of protein synthesis did not alter activation. As 98% of the fatty acid incorporated was esterified to triacylglycerol or phospholipid and only the triacylglycerol mass expanded, several manipulations to potentially alter the flow of acyl chains between these lipid pools were evaluated using dual-label and pulse-chase experiments. Results suggested that competition between 18:2(n-6) utilization for esterification to phospholipid and the desaturation-chain elongation sequence as well as a more direct and specific interaction of certain fatty acids with the enzymes may influence 20:4(n-6) formation. A model to explain these observations is discussed.
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Bandyopadhyay G, Imagawa W, Wallace D, Nandi S. Linoleate metabolites enhance the in vitro proliferative response of mouse mammary epithelial cells to epidermal growth factor. J Biol Chem 1987. [DOI: 10.1016/s0021-9258(18)61570-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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