lipids

3-Hydroxybutyric acid (Butanoic acid) (or beta-hydroxybutyrate) is a ketone body. Like the other ketone bodies (acetoacetate and acetone), levels of 3-hydroxybutyrate in blood and urine are raised in ketosis. In humans, 3-hydroxybutyrate is synthesized in the liver from acetyl-CoA and can be used as an energy source by the brain when blood glucose is low. Blood levels of 3-hydroxybutyric acid levels may be monitored in diabetic patients to look for diabetic ketoacidosis. Persistent mild hyperketonemia is a common finding in newborns. Ketone bodies serve as an indispensable source of energy for extrahepatic tissues, especially the brain and lung of developing mammals. Another important function of ketone bodies is to provide acetoacetyl-CoA and acetyl-CoA for the synthesis of cholesterol, fatty acids, and complex lipids. During the early postnatal period, acetoacetate (AcAc) and beta-hydroxybutyrate are preferred over glucose as substrates for synthesis of phospholipids and sphingolipids in accord with requirements for brain growth and myelination. Thus, during the first 2 weeks of postnatal development, when the accumulation of cholesterol and phospholipids accelerates, the proportion of ketone bodies incorporated into these lipids increases. On the other hand, an increased proportion of ketone bodies is utilized for cerebroside synthesis during the period of active myelination. In the lung, AcAc serves better than glucose as a precursor for the synthesis of lung phospholipids. The synthesized lipids, particularly dipalmitoylphosphatidylcholine, are incorporated into surfactant, and thus have a potential role in supplying adequate surfactant lipids to maintain lung function during the early days of life (PMID: 3884391 ). 3-Hydroxybutyric acid is found to be associated with fumarase deficiency and medium-chain acyl-CoA dehydrogenase deficiency, which are inborn errors of metabolism.

Glycerophospholipids, cephalins (Phosphatidylethanolamines (egg)) are a mixture of phosphatidylethanolamines isolated from eggs, with various fatty acyl groups at the sn-1 and sn-2 positions. Glycerophospholipids and cephalins can be completely hydrolyzed to obtain 1 mol of glycerol, phosphoric acid, ethanolamine and 2 mol of fatty acids. Phosphatidylethanolamines play a role in membrane fusion and disassembly of contractile rings during cell division, regulating membrane curvature. Phosphatidylethanolamines are able to transmit infectious prions without the help of any proteins or nucleic acids. One of the main roles of Phosphatidylethanolamines in bacterial membranes is to disperse the negative charges caused by anionic membrane phospholipids.

Glucocerebrosides is a natural product.

Glucosamine (Chitosamine) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Supplemental glucosamine may help to rebuild cartilage and treat arthritis.

Oleic acid (Glycon Wo) is a natural product, a common monounsaturated fatty acid found in a variety of animal and vegetable fats and oils. Palmitic acid is a Na+ K+ ATPase activator.

Sinapinic Acid (Synapoic acid) protects the rat liver from CCl4-induced inflammation, most likely by acting as a free radical scavenger and modulator of NF-κB p65 activation and proinflammatory cytokine expression. Sinapic acid with antioxidant role protects cardiac cells and its functions from I R induced oxidative stress. Sinapic acid is a potentially useful agent for the protection against liver fibrosis and cirrhosis. Sinapic acid prevents the alterations in the levels of lipids and lipoproteins by virtue of its anti-lipidaemic effect in isoproterenol induced myocardial infarcted rats. Sinapic acid ameliorates hyperglycemia through PLC-PKC signals to enhance the glucose utilization in diabetic rats.

Pyrimidine (Metadiazine)s are heterocyclic, six-membered, nitrogen-containing carbon ring structures, with uracil, cytosine and thymine being the basal structures of ribose-containing nucleosides (uridine, cytidine, and thymidine respectively), or deoxyribose-containing deoxynucleosides, and their corresponding ribonucleotides or deoxyribonucleotides. Pyrimidines serve essential functions in human metabolism as ribonucleotide bases in RNA (uracil and cytosine), and as deoxyribonucleotide bases in DNA (cytosine and thymine), and are linked by phosphodiester bridges to purine nucleotides in double-stranded DNA, in both the nucleus and the mitochondria. Pyrimidine activated sugars are also involved in polysaccharide and phospholipid synthesis, glucuronidation in detoxification processes, glycosylation of proteins and lipids and in the recently identified novel endothelium-derived vasoactive dinucleotides.

Diaminopimelic acid or DAPA is a lysine-like amino acid derivative that is a key component of the bacterial cell wall. DAPA is incorporated or integrated into peptidoglycan of gram negative bacteria and is the attachment point for Braun's lipoprotein (BLP or Murein Lipoprotein). BLP is found in gram-negative cell walls and is one of the most abundant membrane proteins. BLP is bound at its C-terminal end (a lysine) by a covalent bond to the peptidoglycan layer (specifically to diaminopimelic acid molecules) and is embedded in the outer membrane by its hydrophobic head (a cysteine with lipids attached). BLP tightly links the two layers and provides structural integrity to the bacterial outer membrane. Diaminopimelic acid can be found in human urine or feces due to the lysis or enzymatic breakdown of gram negative gut microbes.

β-Glycerophosphate is a classical serine-threonine phosphatase inhibitor used in kinase reaction buffers. BGP is often used in combination with other phosphatase protease inhibitors for broad spectrum inhibition. It functions as an organic phosphate donor

Trilinolein (1,2,3-Trilinoleoylglycerol) is a triacylglycerol and has been reported to provide a number of beneficial effects including reducing thrombogenicity and arrhythmias and increasing erythrocyte deformability. It is also an antioxidant.

1,2-Distearoyl-sn-glycero-3-phosphorylethanolamine (1,2-DSPE) is a phosphatidylethanolamine (PE or GPEtn). The stearic acid moieties are derived from animal fats, cocoa butter, and sesame oil. Phospholipids are ubiquitous in nature and are key components of the lipid bilayer of cells, as well as being involved in metabolism and signaling.

Dodecanedioic acid diammonium salt (1,10-Decanedicarboxylic acid diammonium salt) is a dicarboxylic acid which is water-soluble and involves in a metabolic pathway intermediate to those of lipids and carbohydrates.

Tricaprilin (Glycerol Tri-n-octanoate) is used in study for patients with mild to moderate Alzheimer's disease. Tricaprilin also has a role as an anticonvulsant and a plant metabolite.

1-Hydroxyoctadecane (OctadecanolOctadecanol) is a fatty alcohol present in human and is normally incorporated into plasmalogen lipids. Sjogren-Larsson syndrome is defined by the triad of ichthyosis, mental retardation, and spasticity, and patients accumulate fatty alcohols such as Octadenol in the plasma and cultured fibroblasts.

D-Pantothenic acid (vitamin B5) is a water-soluble vitamin ubiquitously found in plants and animal tissues with an antioxidant property. D-Pantothenic acid is a component of coenzyme A (CoA) and a part of the vitamin B2 complex. D-Pantothenic acid is a growth factor and is essential for various metabolic functions, including the metabolism of carbohydrates, proteins, and fatty acids. This vitamin is also involved in the synthesis of cholesterol, lipids, neurotransmitters, steroid hormones, and hemoglobin.

Nerolidol acetate is a natural sesquiterpene with anti-cancer, anti-inflammatory, antibacterial and anti-insect activities. Nerolidol acetate can inhibit parasite activity and inhibit schistosomiasis, nematodes, malaria, etc. Nerolidol acetate protects cells from oxidative damage to lipids, proteins and DNA, and has a protective effect on mouse hippocampal nerve cells.

Sodium taurocholate (Taurocholate Sodium) hydrate is the main end product of cholesterol catabolism. During enterohepatic circulation, bile taurocholic acid is converted by the microorganisms to taurodeoxycholic acid and deoxycholic acid.[3] These are reabsorbed by the liver via a carrier-mediated process and converted by liver enzymes to taurocholic acid.

Dihydrocapsaicin (CCRIS1589) is isolated from Capsicum fruit. Capsaicin is the primary active component of the heat and pain-eliciting lipid soluble fraction of the Capsicum pepper. Like capsaicin, dihydrocapsaicin is an irritant. Capsaicin is found in natural hot pepper extracts along with a number of impurities, including dihydrocapsaicin and several lesser impurities. Separation by HPLC is required in order to obtain pure dihydrocapsaicin. Dihydrocapsaicin represents about 10% of the compound present in commercial preparations purporting to be pure capsaicin, but it has about the same pungency as capsaicin. VR1 (vanilloid receptor 1) is a heat activated calcium ion channel which functions as a part of the normal nociceptive pain pathway. Capsaicin elicits a sensation of burning pain by activation of VR1 on small, non-myelinated polymodal C-type nociceptive nerve fibers. The potency of dihydrocapsaicin at VR1 appears equivalent to capsaicin. Antioxidant. Reduces oxidation of serum lipids. Mutagenic. Dihydrocapsaicin is an activator of VR1.

α-Linolenic Acid (ALA) is an essential fatty acid that cannot be synthesized by the human body and is obtained by isolating it from seed oils. α-Linolenic acid has been shown to improve memory, inhibit thrombosis, and lower blood lipids.

Lanosterol (3β-Hydroxy-8,24-lanostadiene) is a tetracyclic triterpenoid which is the compound from which all steroids are derived.

Triarachidin (1,2,3-Trieicosanoyl Glycerol) is a triarachidic acid triglyceride. Triglycerides (TGs) are also known as triacylglycerols or triacylglycerides. TGs are the main constituent of vegetable oil and animal fats. TGs are major components of very low density lipoprotein (VLDL) and chylomicrons, play an important role in metabolism as energy sources and transporters of dietary fat. They contain more than twice the energy (9 kcal g) of carbohydrates and proteins.

Palmitoyldocosahexaenoyl phosphatidylcholine is a polyunsaturated fatty acid that mimics special cell membrane structural domain lipids.

1-Palmitoyl-2-oleoyl-sn-glycero-3-PC (Palmitoyloleoylphosphatidylcholine) is a phospholipid commonly found in cell membranes, with cholesterol compositions ranging from 0 to 60 mol%.

Bile acids are essential for solubilization and transport of dietary lipids, are the major products of cholesterol catabolism, and are physiological ligands for farnesoid X receptor (FXR), a nuclear receptor that regulates genes involved in lipid metabolism.1They are also inherently cytotoxic, as physiological imbalance contributes to increased oxidative stress.2,3Bile acid-controlled signaling pathways are promising novel targets to treat such metabolic diseases as obesity, type II diabetes, hyperlipidemia, and atherosclerosis.Guggulsterone, derived from resin of the guggul tree, is a competitive antagonist of FXR bothin vitroandin vivo.4Thecisstereoisomer of guggulsterone, (E)-guggulsterone, decreases chenodeoxycholic acid (CDCA)-induced FXR activation with an IC50value of 15 μM.5,6By inhibiting CDCA-induced transactivation of FXR, guggulsterone lowers low-density lipoprotein cholesterol and triglyceride levels in rodents fed a high cholesterol diet.4 1.Makishima, M., Okamoto, A.Y., Repa, J.J., et al.Identification of a nuclear receptor for bile acidsScience2841362-1365(1999) 2.Barbier, O., Torra, I.P., Sirvent, A., et al.FXR induces the UGT2B4 enzyme in hepatocytes: A potential mechanism of negative feedback control of FXR activityGastroenterology1241926-1940(2003) 3.Tan, K.P., Yang, M., and Ito, S.Activation of nuclear factor (erythroid-2 like) factor 2 by toxic bile acids provokes adaptive defense responses to enhance cell survival at the emergence of oxidative stressMol. Pharmacol.72(5)1380-1390(2007) 4.Urizar, N.L., Liverman, A.B., Dodds, D.T., et al.A natural product that lowers cholesterol as an anatagonist ligand for FXRScience296(5573)1703-1706(2002) 5.Cui, J., Huang, L., Zhao, A., et al.Guggulsterone is a farnesoid X receptor antagonist in coactivator association assays but acts to enhance transcription of bile salt export pumpThe Journal of Biological Chemisty278(12)10214-10220(2003) 6.Wu, J., Xia, C., Meier, J., et al.The hypolipidemic natural product guggulsterone acts as an antagonist of the bile acid receptorMolecular Endocrinology16(7)1590-1597(2002)