Image Lipid A.png thumb 250px Chemical structure of lipid A as found in E. Coli ref name Raetz2009 cite journal author Raetz, Christian R. H. Guan, Ziqiang Ingram, Brian O. Six, David A. Song, Feng Wang, Xiaoyuan Zhao, Jinshi title Discovery of new biosynthetic pathways the lipid A story journal Journal of Lipid Research year 2009 pages S103 S108 ref Lipid A is a lipid component of an endotoxin held responsible for toxicity of Gram negative bacteria . It is the innermost of the three regions of the lipopolysaccharide ... its toxic effects can be damaging, the sensing of lipid A by the human immune system may also be critical ... VK, Carlson RW, Stephens DS title Endotoxin of Neisseria meningitidis composed only of intact lipid ... activating abilities of LPS can be attributed to the lipid A unit. It is a very potent stimulant ... composition Lipid A consists of two glucosamine carbohydrate sugar units with attached acyl chains ... The optimal immune activating lipid A structure is believed to contain 6 acyl chains. Four acyl .... E. coli lipid A, as an example, typically has four C14 hydroxy acyl chains attached to the sugars ... for Lipid A in E. coli has been determined by the work of Christian R. H. Raetz in the past 32 years. ref name Raetz Lipid A structure and effects on eukaryotic cells have been determined and examined ... center thumb 700px Synthesis of the UDP diacylglucosamine precursor of Lipid A ref name King cite ... of Lipid IV sub a sub ref name King Inhibition and activation of immune response Lipid A with a reduced ... versions of lipid A can be used as components of vaccine s adjuvant s to improve their effect. Citation needed date March 2009 Mechanism of activating cells Lipid A and LPS has been demonstrated ... al., Nature 2009 . Consequently, lipid A Structural analog analogs like eritoran can act as TLR4 receptor ... medicine ref See also Lipid A deacylase PagL References reflist External links MeshName Lipid A http www.lipidlibrary.co.uk Lipids lipidA index.htm The Lipid Library Summary of Lipid A and bacterial ... more details
membrane s, and as important lipid signaling signaling molecules . ref name pmid19098281 cite journal ... M and Dennis E.A title Update of the LIPID MAPS comprehensive classification system for lipids journal Journal of Lipid Research volume 50 pages S9 S14 year 2009 pmid 19098281 doi 10.1194 jlr.R800095 ... . ref name pmid19098281 Although the term lipid is sometimes used as a synonym for fat s, fats are a subgroup ... they form part of a lipid, are a diverse group of molecules synthesized by chain elongation of an acetyl ... Lipid Analysis, Volume 432 Methods in Enzymology publisher Academic Press location Boston year 2007 ... to sight ref name The Lipid Chronicles cite web title A Long Lipid, a Long Name Docosahexaenoic Acid url http www.samuelfurse.com 2011 12 a long name a long lipid docosahexaenoic acid work The Lipid Chronicles accessdate 31 12 2011 ref . Other major lipid classes in the fatty acid category ... of triglyceride synthesis and their regulation journal Progress in Lipid Research volume 43 pages 134 ... journal Progress in Lipid Research volume 46 issue 5 pages 225 43 year 2007 pmid 17599463 doi 10.1016 ... s, are ubiquitous in nature and are key components of the lipid bilayer of cells ref name ... 2011 11 the structure of a membrane work The Lipid Chronicles accessdate 31 12 2011 ref , as well ... in lower animals journal Prog. Lipid Res volume 32 issue 1 pages 25 45 year 1993 pmid 8415797 ... structure, biosynthesis and function journal Progress in Lipid Research volume 44 issue 4 pages ... of the saccharolipid Kdo sub 2 sub Lipid A. ref name Raetz2006 Glucosamine residues in blue, 3 ... familiar saccharolipids are the acylated glucosamine precursors of the lipid A Lipid A component ... lipopolysaccharide required for growth in Escherichia coli E. coli is Kdo sub 2 sub Lipid A, a hexa ... Lipid A of Escherichia coli , a defined endotoxin that activates macrophages via TLR 4 journal Journal of Lipid Research volume 47 pages 1097 111 year 2006 pmid 16479018 doi 10.1194 jlr.M600027 JLR200 ... more details
Unreferenced date December 2009 Orphan date November 2006 A simple lipid is a saponifiable lipid with just two types of components. When more components exist, the saponifiable lipid is classified as a complex lipid. See also Lipid Simple Lipids Esters of fatty acids with various alcohols. a. Fats Esters of fatty acids with glycerol. Oils are fats in the liquid state. b. Waxes Esters of fatty acids with higher molecular weight monohydric alcohols. Biochem stub DEFAULTSORT Simple Lipid Category Lipids ... more details
Lipid metabolism refers to the processes that involve the intercourse and degradation of lipid s. The types of lipids involved include Bile salt s Cholesterol s Eicosanoid s Glycolipid s Ketone bodies Fatty acids see also fatty acid metabolism Phospholipid s Sphingolipid s Steroid see also steroidogenesis Triacylglycerol s fats see also lipolysis and lipogenesis External links MeshName Lipid metabolism Ophardt, Charles E. 2003 http www.elmhurst.edu chm vchembook 622overview.html Lipid Catabolism Summary . Virtual Chembook. Elmhurst College. King, Michael W. http themedicalbiochemistrypage.org lipid synthesis.html Fatty Acid, Omega 3 and Omega 6 Fatty Acid, Triglyceride, and Phospholipid Synthesis and Metabolism . The Medical Biochemistry Page. Metabolism Lipid metabolism enzymes Eicosanoid metabolism enzymes Glycolipid sphingolipid metabolism enzymes Ketone and cholesterol metabolism enzymes Category Lipids Category Metabolism biochemistry stub sr Lipidni metabolizam ... more details
Context date May 2009 Lipid microdomains are formed when lipid s undergo lateral phase matter phase separations yielding stable coexisting lamellar Lipid bilayer domain s. These phase separation s can be induced by changes in temperature , pressure , ionic strength or by the addition of divalent cation s or protein s. The question of whether such lipid microdomains observed in model lipid systems also exist in biomembrane s had motivated considerable research efforts. Lipid domains are not readily isolated and examined as unique species, in contrast to the examples of lateral heterogeneity . One can disrupt the membrane and demonstrate a heterogeneous range of composition in the population of the resulting Vesicle biology vesicles or fragment s. Electron microscopy can also be used to demonstrate lateral inhomogeneities in biomembranes. Often, lateral heterogeneity has been inferred from biophysical techniques where the obsereved signal indicates multiple populations rather than the expected ... lipid analogue in soybean protoplast s. Membrane microheterogeneity is sometimes inferred ... lipid physical state exhibited by the bulk of the membrane. Often, the methods suggest regions with different lipid fluidity , as would be expected of coexisting gel and liquid crystal line ... domains. See also Commons category Lipids Biochemistry Essential fatty acid Lipid signaling Saturation ... 164, Springer Verlag, New York, 1989. Shape instabilities in charged lipid domains.Journal of Physical ... Terminal Domains on Lipid Raft Localization of the Murine Gonadotropin Releasing Hormone Receptor. Biology of Reproduction 74 5 788 797. 2006. Investigation of the lipid domains and apolipoprotein orientation ... 94 8 3104 Lipid microdomain formation. http www.jimmunol.org cgi reprint 168 6 2737.pdf Lipid microdomain clustering. http medcat.wustl.edu catflat BME B720468.html Lipid microdomain signaling. DEFAULTSORT Lipid Microdomain Category Biochemistry ... more details
unreferenced date November 2011 Lipid profile or lipid test panel panel , is the collective term given to the estimation of, typically, cholesterol total cholesterol , high density lipoprotein high density lipoprotein cholesterol , low density lipoprotein low density lipoprotein cholesterol , and triglycerides . An extended lipid profile may include very low density lipoprotein . This is used to identify hyperlipidemia various disturbances of cholesterol and triglyceride levels , many forms of which are recognized risk factors for cardiovascular disease and sometimes pancreatitis . It is recommended that healthy adults with no other risk factors for heart disease be tested with a fasting lipid profile once every five years. citation needed date July 2011 Individuals may also be screened using only a cholesterol test and not a full lipid profile. However, if the cholesterol test result is high, there may be the need to have follow up testing with a lipid profile. citation needed date July 2011 If there are other risk factors or the individual has had a high cholesterol level in the past, regular testing is needed and the individual should have a full lipid profile. citation needed date July 2011 For children and adolescents at low risk, lipid testing is usually not ordered routinely. However, screening with a lipid profile is recommended for children and youths who are at an increased risk of developing heart disease as adults. Some of the risk factors are similar to those in adults and include a family history of heart disease or health problems such as diabetes, high blood pressure hypertension , or being overweight. High risk children should have their first lipid profile ... should also be measured. citation needed date July 2011 A lipid profile may also be ordered at regular intervals to evaluate the success of lipid lowering lifestyle changes such as diet and exercise ... References references External links http www.labtestsonline.org understanding analytes lipid glance.html ... more details
Unreferenced date February 2008 A saponifiable lipid is one with an ester functional group, that can be hydrolysis hydrolyzed under basic conditions. These include triglyceride s, phospholipids , glycolipid s, sphingolipid s, and the wax es. These lipids are known as simple lipids . See also Lipids Category Lipids biochem stub ... more details
Image Lipid peroxidation.svg thumb 350px right Mechanism of lipid peroxidation. Lipid peroxidation refers to the redox oxidative degradation of lipid s. It is the process in which Radical chemistry free radicals steal electrons from the lipids in cell membranes , resulting in cell damage. This process proceeds by a free radical Chemical reaction chain reaction mechanism. It most often affects polyunsaturated fatty acids , because they contain multiple double bonds in between which lie methylene CH2 groups that possess especially reactive hydrogen s. As with any radical reaction, the reaction consists of three major steps initiation, propagation, and termination. Initiation Initiation is the step in which a fatty acid radical chemistry radical is produced. The most notable initiators in living cells are reactive oxygen species ROS , such as hydroxyl radical OH and HO2 , which combines with a hydrogen atom to make water and a fatty acid radical. Propagation The fatty acid radical is not a very ... fatty acid radical and a lipid peroxide, or a cyclic peroxide if it had reacted with itself ... doi abs 10.1111 j.1651 2227.1985.tb10987.x?journalCode apa Red Cell Membrane Lipid Peroxidation ... of lipid peroxidation may be mutagenic and carcinogenic . ref name martnett For instance, the end ... to them, primarily M1G M sub 1 sub G . ref name martnett The toxicity of lipid hydroperoxides to animals .... These animals do not survive past embryonic day 8, indicating that the removal of lipid hydroperoxides ... 503 ref Tests Certain diagnostic tests are available for the quantification of the end products of lipid ... sites entrez?db pubmed&list uids 10064852&cmd Retrieve&indexed google Lipid peroxidation DNA damage ..., so this test is not completely specific for lipid peroxidation. ref name trevisan http ... metabolites and lipid peroxidation by products in migraine. Cephalalgia. 2003 Feb 23 1 39 42. ref References references External links MeshName Lipid peroxidation DEFAULTSORT Lipid Peroxidation Category ... more details
Prog. Lipid Res. volume 34 issue 4 pages 343 64 year 1995 pmid 8685243 doi 10.1016 0163 7827 95 00013 5 ref Accordingly, peroxisomal defects often lead to impairment of ether lipid production. Monoalkylglycerol ... by specific phospholipase s enzyme s might be involved in the generation of lipid second messenger ... cite journal author Spector A, Yorek M title Membrane lipid composition and cellular function url http www.jlr.org cgi reprint 26 9 1015 journal J Lipid Res volume 26 issue 9 pages 1015 35 date 1 September ... activating factor is an ether lipid signaling molecule that is involved in leukocyte function in the mammalian ... component a new class of lipid chemical mediators url http www.jbc.org cgi reprint 254 19 9355 journal ... 10.1042 BST0320147 ref Synthetic ether lipid analogs Synthetic ether lipid analogs have chemotherapy ... C . A toxic ether lipid analogue miltefosine has recently been introduced as an oral treatment ... with a particularly high ether lipid content in its membranes. ref cite journal author Lux H, Heise N, Klenner T, Hart D, Opperdoes F title Ether lipid alkyl phospholipid metabolism and the mechanism of action of ether lipid analogues in Leishmania journal Mol Biochem Parasitol volume 111 issue 1 ... more details
and type . Hexagonal phases in the lipid polymorphism In lipid polymorphism, if the packing ratio of lipids is greater or less than one, lipid membranes can form two separate hexagonal phases, or nonlamellar phases, in which long, tubular aggregates form according to the environment the lipid ... H sub II sub Lipid molecules in the HII phase pack inversely to the packing observed in the hexagonal ... apparently stabilizes this phase as a whole. It is also possible that an outer monolayer of lipid coats ... for the hydrophobic effect. This structures tight packing of the lipid head groups reduces their contact ... phase is present during perturbations done on the lipid. These perturbations include pH changes, temperature ... of Lipid Water Systems , from the Handbook of Biological Physics, Vol. 1, ed. R. Lipowsky, and E. Sackmann ... more details
Infobox Disease Name Lipid pneumonia Image Caption DiseasesDB ICD10 ICD9 ICD9 516.8 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D011017 Lipid pneumonia or lipoid pneumonia is a specific form of lung inflammation pneumonia that develops when lipids enter the bronchial tree. The disorder is sometimes called Cholesterol pneumonia in cases where the lipid is a factor. ref cite journal author Pelz L, Hobusch D, Erfurth F, Richter K title Familial cholesterol pneumonia journal Helv Paediatr Acta year 1972 pages 371 9 volume 27 issue 4 pmid 4644274 ref Causes Sources of such lipids could be either exogenous or endogenous. ref name urlPulmonary Pathology cite web url http library.med.utah.edu WebPath LUNGHTML LUNG026.html title Pulmonary Pathology work accessdate 2008 11 21 ref Exogenous from outside the body. For example, inhaled nose drops with an oil base, or accidental inhalation of cosmetic oil. Amiodarone is an anti arrythmic known to cause this condition. Endogenous from the body itself, for example, when an airway is obstructed, it is often the case that distal to the obstruction, lipid laden macrophages Foam cell foamy macrophages and giant cells fill the lumen of the disconnected airspace. Appearance The gross appearance of a http www medlib.med.utah.edu WebPath LUNGHTML LUNG026.html lipid pneumonia is that in which there is an ill defined, pale yellow area on the lung. This yellow appearance explains the colloquial term golden pneumonia. At the microscopic scale foamy macrophages and giant cells are seen in the airways, and the inflammatory response is visible in the parenchyma. Treatment Treatment is with corticosteroids and possibly intravenous immunoglobulins . References reflist External links OMIM 215030 Respiratory pathology pneumonia Category Pneumonia ca Pneum nia lipo dal ... more details
Refimprove date February 2011 Image Lipid raft organisation scheme.svg thumb 450px Lipid raft organisation, region 1 is standard lipid bilayer, while region 2 is a lipid raft. The plasma membrane of cells ... in glycolipoprotein microdomains termed lipid rafts . ref Thomas S., Pais A.P., Casares S and Brumeanu T.D. 2004 . Analysis of lipid rafts in T cells. Molecular Immunology 41 399 409. http www.sciencedirect.com ... ref Thomas S., Kumar R.S. and Brumeanu.T.D 2004 . Role of lipid rafts in T cells. AITE 52 215 224. http ... cite pmid 18955730 ref Lipid rafts are more ordered and tightly packed than the surrounding bilayer , but float freely in the membrane bilayer. ref cite pmid 12208858 ref Properties of lipid rafts ... a and cholesterol b . One key difference between lipid rafts and the plasma membranes from which they are derived is lipid composition. Research has shown that lipid rafts generally contain ... 2011 Also, lipid rafts are enriched in sphingolipid s such as sphingomyelin , which is typically elevated ... levels are decreased which results in similar choline containing lipid levels between the rafts ... nature of the sterol group, cholesterol partitions preferentially into the lipid rafts where ..., Mahfoud R, Yahi N title Lipid rafts structure, function and role in HIV, Alzheimer s and prion diseases ... ref Rietveld & Simons related lipid rafts in model membranes to the immiscibility of ordered ... the two phases. Studies have shown there is a difference in thickness of the lipid rafts and the surrounding ... rafts into larger rafts, can also minimize line tension. ref name Pike By one early definition of lipid rafts, lipid rafts differ from the rest of the plasma membrane. In fact, researchers who date February 2011 have hypothesized that the lipid rafts can be extracted from a plasma membrane. The extraction would take advantage of lipid raft resistance to non ionic detergent s, such as Triton X 100 ... membrane will dissolve while the lipid rafts may remain intact and could be extracted. citation needed ... more details
also Model lipid bilayer The lipid bilayer is a thin membrane made of two layers of lipid molecule s. These membranes ... membrane of almost all life living organisms and many virus es are made of a lipid bilayer, as are the membranes surrounding the cell nucleus and other sub cellular structures. The lipid bilayer is the barrier ... diffusing into areas where they should not be. Lipid bilayers are ideally suited to this role because ... ion pumps . Image Lipid bilayer section.gif right thumb 300px This fluid lipid bilayer cross ... effect . Because lipid bilayers are quite fragile and are so thin that they are invisible ... for destruction by the immune system . Lipid tails can also affect membrane properties, for instance ... of certain integral membrane protein s. Integral membrane proteins function when incorporated into a lipid .... Structure and organization A lipid bilayer is a sheet of lipid s two molecules thick, arranged ... lipid tails and the surrounding water. Thus, a lipid bilayer is typically held together by entirely ... tails point out to the air. In the case of a lipid bilayer, this structure is reversed with heads out and tails in. Another important difference between lipid bilayers and soap bubbles is their relative ... colors on a bubble surface. A single lipid bilayer, on the other hand, is around five nanometers ... profile of a typical lipid bilayer. There are three distinct regions the fully hydrated headgroups ... section analysis The lipid bilayer is very thin compared to its lateral dimensions. If a typical mammalian cell diameter 10 micrometre were magnified to the size of a watermelon 1 ft 30 cm , the lipid ... author Lewis BA, Engelman DM title Lipid bilayer thickness varies linearly with acyl chain length ... Nagle JF, Tristram Nagle S title Structure of lipid bilayers journal Biochim. Biophys. Acta volume .... ref name Marsh2001 cite journal author Marsh D title Polarity and permeation profiles in lipid membranes ... T, Needham D, Evans E title Effect of chain length and unsaturation on elasticity of lipid bilayers ... more details
Orphan date February 2009 Lipid therapy , fat therapy , or therapeutic lipovenous injections is a controversial medical technique that entails the injection and expulsion of fats and lipids, which proponents claim can improve cognitive and memory function. The technique recently gained notoriety, when it was revealed it had become a popular technique with French and Italian celebrities, and more recently a rumored handful of American celebrities. Description Patients who choose to undergo the controversial therapy are injected once a week for two months with a high density animal fat. Since most toxins in the body are fat soluble according to practitioners , this causes the patient to defecate a translucent slime, which is claimed to carry out the body s toxins, in turn boosting energy, increasing concentration, and improving memory. Many medical experts who oppose the technique have pointed out the slimy discharge how the body deals with any excess of intestinal and intravenous lipids, and it is a sign of high risk of artery damage and poor water absorption. Legal regulations sorting of any therapy as effective treatment for any condition is heavily restricted by law in many jurisdictions unless all such claims are scientifically validated. In the United States, for example, U.S. Food and Drug Administration regulations prohibit marketing any lipid therapy using medical claims, as such claims are unfounded. Additionally, clinicians and doctors who perform the therapy have drawn scrutiny from the Department of Agriculture for questionable documentation on their acquisition of the animal fat. Efficacy Double blind Blinding of patients and assessors to the therapy is difficult since lipid therapy can be easily discerned by the painful pressure in the thoracic cavity engendered by the sudden dip in plasma viscosity. Globules of lipid polymers also produce a significant shear ... of Lipids, Lipoproteins and Membranes . Elsevier, 2008. ISBN 0444532196 Yagi, Kunio. Lipid ... more details
The lipid hypothesis was one of two Hypothesis hypotheses the other being the chronic endothelial injury ... by the German pathologist Rudolf Virchow in 1856 and suggested that blood lipid accumulation ..., the lipid hypothesis received greater attention. An accumulation of evidence has led to the acceptance of the lipid hypothesis as scientific fact by the medical community ref name partv cite journal ... journal J. Lipid Res. volume 47 issue 7 pages 1339 51 year 2006 pmid 16585781 doi 10.1194 .... Lipid hypothesis of atherogenesis Early studies and origin In 1913, a study by Nikolai Anitschkow ..., Duff and McMillian formulated the lipid hypothesis in its modern form in a review which appeared ... century, the lipid hypothesis proposing that saturated fat s and cholesterol in the blood are a major ... its validity. The interpretation of this research has resulted in the general acceptance of the lipid ... majority of researchers and practitioners were supportive of the validity of the lipid hypothesis ... trial ends it almost journal J Lipid Res date 2006 volume 47 pages 1 14 pmid 16227628 doi 10.1194 ... of the 1980s, the evidence accumulated through studies resulted in general acceptance of the lipid ... volume 6 pages 36 37 pmid 9633288 issue 5 ref and by 2002, the lipid hypothesis was accepted by the scientific ... isbn 1400040787 ref A minority of the medical community still argue that the lipid hypothesis has ... downloads softsciencefat.pdf ref Nowadays, the term lipid hypothesis is commonly used ... the 1970s and 1980s, some researchers and practitioners considered the lipid hypothesis as unverified ... risk for atherosclerosis. ref name Rifkind cite journal author Rifkind B, Levy R title Testing the lipid ... supporting it were flawed. ref name Oliver cite journal author Oliver M title Lipid lowering ... pmid 6948505 ref ref name Stehbens88 cite journal author Stehbens W title Flaws in the lipid hypothesis ... 5 Pt 2 ref However, even after the Coronary Primary Prevention Trial ref cite journal title The Lipid ... more details
Image signaling lipids2.png right thumb 400px Common lipid signaling molecules BR lysophosphatidic acid ... ethanolamine AEA Lipid signaling, broadly defined, refers to any biological cell signaling signaling event involving a lipid messenger that binds a protein target, such as a receptor biochemistry receptor ... responses. Lipid signaling is thought to be qualitatively different from other classical signaling ... through Cell membrane membranes see osmosis . One consequence of this is that lipid messengers cannot ... on demand at their intended site of action. As such, many lipid signaling molecules cannot circulate ... . Sphingolipid second messengers Main second messenger system Main sphingolipid File Second lipid messengers ... group from the sphingosine backbone. Alternatively, this sphingosine derived lipid sphingolipid .... J. Lipid Res . 46 , 2706 2716 2005 . ref It is also possible to regenerate sphingomyelin from ceramide ... for ceramide activation of serine threonine protein phosphatases. J. Lipid Res. 45 , 496 506 2004 ... , and by inositol lipid metabolic pathways. ref Fugmann, T. et al. Regulation of secretory ... mechanisms at various times. ref Hannun, Y.A. and Obeid L.M. Principles of bioactive lipid signalling .... Chem. . 278 , 34541 34547 2003 . ref Sphingosine is a single chain lipid usually 18 carbons in length ..., N. et al. Lipid second messengers and cell signaling in vascular wall. Biochemistry Mosc. 72 , 797 ... of inhibiting glucosylceramide synthesis with PDMP and other substances. Adv. Lipid Res. 26 , 183 ... acid released in cells in response to a protein called interleukin 1 IL 1 and a lipid soluble ... of acid sphingomyelinase in macrophages. J. Lipid Res. 45 , 99 105 2004 . ref and increase ..., Y. Protein kinase C and lipid signaling for sustained cellular responses. FASEB J . 9 . 484 496 1995 ... such lipid to be isolated was anandamide which is the arachidonoyl amide of ethanolamine . Anandamide ... types References reflist 2 Cell signaling Lipid signaling DEFAULTSORT Lipid Signaling Category Signal ... more details
Infobox journal title Journal of Lipid Research cover File Jlr cover.gif editor Edward A. Dennis , Joseph L. Witztum discipline Lipid Lipids abbreviation J. Lipid Res. publisher American Society for Biochemistry and Molecular Biology country United States frequency history 1959 present openaccess After 12 months license impact 4.917 impact year 2009 website http www.jlr.org link1 http www.jlr.org content current link1 name Online access link2 http www.journals.uchicago.edu loi isis link2 name Online archives link2 link2 name JSTOR OCLC 01589637 LCCN 62001186 CODEN JLPRA ISSN 0022 2275 eISSN 1539 7262 The Journal of Lipid Research is a monthly peer review peer reviewed scientific journal that was established in 1959. Since 2000, it is published by the American Society for Biochemistry and Molecular ... of the Journal for Lipid Research to an American Society of Biochemistry and Molecular Biology journal url http www.jlr.org cgi content abstract 50 Supplement S3 journal Journal of Lipid ... ref It covers research in ...the science of lipid lipids in health and disease. The Journal emphasizes lipid function and the biochemical and Genetics genetic regulation of lipid metabolism . In addition ... to altered lipid metabolism, including modification of dietary lipids. ref http www.jlr.org misc about.dtl About The Journal of Lipid Research AIM AND SCOPE ref The journal is published in print ... full 50 Supplement S1 BIB1 title Fifty years of research on lipids journal Journal of Lipid Research ... of published methodology methodologies in lipid research as perceived by Edward H. Ahrens , Donald Zilversmit , and others, who founded Lipid Research Inc. to publish the journal. ref cite journal author Howard A. Edmer year 1984 title History of the Journal of Lipid Research url http www.jlr.org cgi reprint 25 13 1425 journal Journal of Lipid Research volume 25 issue 13 pages 1425 9 doi pmid 6397549 ... journal Journal of Lipid Research volume 41 issue 8 pages 1185 1186 doi pmid 10946003 ref ... more details
In lipid anchored proteins , a covalently attached fatty acid such as palmitate or myristate serves to anchor them to either face of the cell membrane . Examples include G protein s and certain kinase s. It is believed that the fatty acid chain inserts and assumes a place in the lipid bilayer bilayer structure of the membrane alongside the similar fatty acid tails of the surrounding lipid molecules. Potential points of attachment include the terminal amino group of the protein backbone and the side chain of cysteine residues. Prenylation is the attachment of lipid chains to proteins to facilitate their interaction with the cell membrane . Some important prenylation chains are geranylgeraniol , farnesol and dolichol , all products of the HMG CoA reductase metabolic pathway . Other anchors include the GPI anchor see there . The bond is covalent. ref name Karp2009 cite book author Gerald Karp title Cell and Molecular Biology Concepts and Experiments url http books.google.com books?id arRGYE0GxRQC&pg PA128 accessdate 13 November 2010 year 2009 publisher John Wiley and Sons isbn 9780470483374 pages 128 ref References Reflist Cell membranes DEFAULTSORT Lipid Anchored Protein Category Membrane biology Category Membrane proteins Category Lipoproteins Category Posttranslational modification Membrane protein stub sr Lipid vezani proteini ... more details
Copy to Wikimedia Commons Summary a figure showing common lipid signaling molecules created by me roadnottaken in chemdraw and Illustrator Licensing GFDL migration relicense Category Unclassified Chemical Structures ... more details
Wikify date September 2011 A solid lipid nanoparticle SLN is typically spherical with an average diameter between 10 to 1000 nanometers. Solid lipid nanoparticles possess a solid lipid core matrix that can solubilize lipophilic molecules. The lipid core is stabilized by surfactants emulsifiers . The term lipid is used here in a broader sense and includes triglycerides e.g. tristearin , diglycerides e.g. glycerol bahenate , monoglycerides e.g. glycerol monostearate , fatty acids e.g. stearic acid , steroids e.g. cholesterol , and waxes e.g. cetyl palmitate . All classes of emulsifiers with respect to charge and molecular weight have been used to stabilize the lipid dispersion. It has been found ... et al, 2001 and Small, 1986 . Development of solid lipid nanoparticles is one of the emerging fields ..., as well as in other discipline. Due to their unique size dependent properties, lipid nanoparticles ... enhancement along with controlled and site specific drug delivery. Solid lipid nanoparticles ... combine the advantages of lipid emulsion and polymeric nanoparticle systems while overcoming the temporal ... Mehnert et al., 2001 . An SLN is generally spherical in shape and consists of a solid lipid ... minimum carrier cytotoxicity and the solid state of the lipid permit better controlled drug release ... water soluble drugs in the solid lipid matrix. Nanotechnology is expected to revolutionize ocular ... bioavailability of both hydrophilic and lipophilic drugs. Solid lipid nanoparticles have another .... ref cite journal last Seyfoddin first Ali coauthors J. Shaw, R. Al Kassas title Solid lipid ...,A., Muthu,MS., Singh,S. 2010 Studies on development repaglinide loaded solid lipid nanoparticles effect of lipid matrix. Therapeutic delivery 1 1 , 63 73. Rawat, M.K. , Jain, A., Singh,S. 2011 Studies on binary lipid matrix based solid lipid nanoparticles of repaglinide In vitro and in vivo evaluation ... In vivo and cytotoxicity evaluation of repaglinide loaded binary solid lipid nanoparticles after oral ... more details
Pfam box Symbol PagL Name Lipid A 3 O deacylase PagL image 2erv.gif width 200 caption Pfam PF09411 InterPro SMART Prosite SCOP 2erv TCDB OPM family 26 OPM protein 2erv PDB PDB 2erv Lipid A deacylase PagL is an outer membrane protein with lipid A 3 O deacylase activity. It forms an 8 stranded beta barrel structure. References Crystal structure and catalytic mechanism of the LPS 3 O deacylase PagL from Pseudomonas aeruginosa. Rutten L, Geurtsen J, Lambert W, Smolenaers JJ, Bonvin AM, de Haan A, van der Ley P, Egmond MR, Gros P, Tommassen J Proc Natl Acad Sci U S A. 2006 103 7071 7076. PMID 16632613 Category Protein domains Category Protein families Category Outer membrane proteins membrane protein stub ... more details
One of the most important properties of a lipid bilayer is the relative mobility fluidity of the individual lipid molecules and how this mobility changes with temperature. This response is known as the phase behavior of the bilayer. Broadly, at a given temperature a lipid bilayer can exist in either ... phases the lipid molecules are constrained to the two dimensional plane of the membrane, but in liquid ... lipid will rapidly exchange locations with its neighbor millions of times a second and will, through ... Motion Constraints In contrast to this large in plane mobility, it is very difficult for lipid molecules ... of the basic structure of the bilayer. For a lipid to flip from one leaflet to the other, its hydrated ... Origins Image Lipid unsaturation effect.svg right thumb 320px Diagram showing the effect of unsaturated ... permeable to water and other small molecules. The phase behavior of lipid bilayers is largely determined ... lipid molecules. The extent of this interaction is in turn governed by how long the lipid tails are and how ... the strength of this interaction and consequently decreasing the lipid mobility. Thus, at a given temperature, a short tailed lipid will be more fluid than an otherwise identical long tailed lipid. ref name Rawicz2000 W. Rawicz, K. C. Olbrich, T. McIntosh, D. Needham and E. Evans. Effect of chain length and unsaturation on elasticity of lipid bilayers. Biophysical Journal. 79. 2000 328 ... increases with increasing number of carbons in the lipid alkane chains. Saturation chemistry ... of unsaturation of the lipid tails. An unsaturated double bond can produce a kink in the alkane ... the transition temperature of a lipid by ten degrees Celsius or less, but adding a single double bond ... need not be composed of a single type of lipid and, in fact, most natural membranes are a complex mixture of different lipid molecules. Such mixtures often exhibit properties intermediate to their components .... Partitioning of Thy 1, GM1, and cross linked phospholipid analogs into lipid rafts reconstituted ... more details
Infobox Disease Name Lipid storage disorder Image Caption DiseasesDB ICD10 ICD10 E 75 e 70 ICD9 ICD9 272.7 ICDO OMIM MedlinePlus eMedicineSubj ped eMedicineTopic 1310 MeshID D008064 Lipid storage disorders or lipidoses are a group of inherited metabolism metabolic disorders in which harmful amounts of lipid s fats accumulate in some of the body s cell biology cells and tissues. ref name urlLipid Storage Diseases Fact Sheet National Institute of Neurological Disorders and Stroke NINDS cite web url http www.ninds.nih.gov disorders lipid storage diseases detail lipid storage diseases.htm title Lipid Storage Diseases Fact Sheet National Institute of Neurological Disorders and Stroke NINDS format work accessdate ref People with these disorders either do not produce enough of one of the enzyme s needed to metabolize lipids or they produce enzymes that do not work properly. Over time, this excessive storage of fats can cause permanent cellular and tissue damage, particularly in the brain , peripheral nervous system , liver , spleen and bone marrow . Lipid s are broadly defined as any fat soluble ... Lipid storage diseases can be inherited two ways Autosomal recessive inheritance occurs when both parents ... will be carriers for the disorder. Diagnosis of the lipid storage disorders can be achieved ... available to determine if the fetus will have the disease or is a carrier. ref Lipid Storage Diseases ... treatments for lipid storage disorders, however, there are some highly effective enzyme replacement ... may prove to be effective for certain lipid storage disorders. ref Ierardi Curto, Lynne MD, PhD. Lipid Storage Disorders. Medscape. 30 Sept. 2010. 6 Dec 2011. http emedicine.medscape.com .... ref Lipid Storage Diseases Fact Sheet National Institute of Neurological Disorders and Stroke NINDS . ref See also Xanthomatosis Niemann Pick disease References reflist Lipid storage disorders Category Lipid storage disorders pt Lipidose es Lipidosis ... more details
Protein lipid interaction is the influence of membrane protein s on the lipid physical state or vice ... are specific for particular lipids and whether the protein lipid complexes can be considered to be long ... membrane proteins. These involve the use of lipid analogues in reconstituted phospholipid Vesicle biology ..., a rapidly tumbling species in the bulk lipid phase with a sharp spectrum, and a Motion physics motionally restricted component adjacent to the protein. 2 Spin labeled and bromination brominated lipid ... of quenching depends on the distance between the lipid derivative and the fluorescent tryptophans. Perturbations of the lipid bilayer due to the presence of lateral membrane proteins Most sup ... little effect on either the order parameter of the lipids in the bilayer or the lipid dynamics mechanics ... that the order parameters of the bound lipid are barely affected by being adjacent to proteins, 3 that the dynamics ... ref Alireza Mashaghi et al. Optical anisotropy of supported lipid structures probed by waveguide spectroscopy and its application to study of supported lipid bilayer formation kinetics Anal. Chem., 80 10 , 3666 3676 2008 http dx.doi.org 10.1021 ac800027s ref or order within lipid bilayers ... of lipid disordering by aurein 1.2 during membrane adsorption, destabilisation and lysis, Biochimica .... Binding of peripheral membrane proteins to the lipid bilayer Many peripheral membrane proteins ... group of proteins which interact directly with the surface of the lipid bilayer . Some ... by an amphipathic secondary structural domain in the protein, or induced and stabilized by the lipid ... are associated with self association to lipid membranes and subsequent aggregation and in, for example ..., Insight into early events in the aggregation of the prion protein on lipid membranes, Biochimica ... . Springer Verlag, New York, 1989. H L Scott, Jr & T J Coe. A theoretical study of lipid protein interactions in bilayers . Biophys J. 1983 June 42 3 219 224. See also Lipid DEFAULTSORT Protein Lipid ... more details
A model lipid bilayer is any bilayer assembled in vitro , as opposed to the bilayer of natural cell membrane ... pure synthetic lipid. More physiologically relevant model bilayers can be made with mixtures of several ... advantages and disadvantages. The first system developed was the black lipid membrane or painted ... come at the cost of unwanted substrate interactions which can denature membrane proteins . Black lipid membranes BLM Image Black lipid membrane.svg right thumb 350px Schematic of a painted bilayer experiment ... bilayer system developed was the painted bilayer, also known as a black lipid membrane. The term painted ... and squalene . A lipid monolayer spontaneously forms at the interface between the organic and aqueous phases on either side of the lipid solvent droplet. Because the walls of the aperture are hydrophobic the lipid solvent solution wets this interface, thinning the droplet in the center. Once the two sides of the droplet come close enough together, the lipid monolayers fuse, rapidly excluding ... planar lipid bilayer membranes. Biophysical Journal . 12. 1972 432 445. ref The term black bilayer ..., and E A Dawidowicz. Formation of black lipid membranes by oxidation products of cholesterol. Nature. 212. 1966 718 719. ref Black lipid membranes are also well suited to electrical characterization ... used in conjunction with painted lipid bilayers. Simple measurements indicate when a bilayer forms ... to combine electrophysiological and structural investigations of Black Lipid Membranes. ref name ... lipid membranes. Applied Physics Letters. 95. 2009 203703. ref The main problems associated with painted ... M Montal and P Mueller. Formation of Bimolecular Membranes from Lipid Monolayers and a Study ..., a black lipid membrane will survive for less than an hour, precluding long term experiment s. This lifetime ... of Free Standing Lipid Membranes Facilitated by Micromachined Apertures. Langmuir. 24. 2008 4952 ... Lipid Bilayer Membranes Anchored to an In Situ Polymerized Hydrogel. Advanced Materials. 20. 2007 84 ... more details
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