(±)12(13)-DiHOME is the diol form of (±)12(13)-EpOME , a cytochrome P450-derived epoxide of linoleic acid also known as isoleukotoxin. [1] It is formed from 12(13)-EpOME by soluble epoxide hydrolase (sEH) in neutrophils. [2] 12(13)-DiHOME is toxic to Sf21 cells expressing sEH and to lacZ-expressing control cells, unlike isoleukotoxin, which is only toxic to cells containing sEH.[1] [2] Levels of 12(13)-DiHOME are increased in rat spinal cord following burn injury, and it enhances cold tolerance, increases fattyacid uptake into brown adipocytes, and decreases serum triglyceride levels in mice. Levels are also elevated in bronchoalveolar lavage fluid (BALF) in humans following exposure to biodiesel exhaust and in exhaled breath condensate in patients with allergic asthma following allergen exposure.[5] [6] Plasma levels of 12(13)-DiHOME are increased immediately following moderate-intensity exercise in mice and humans, an effect that can be prevented by brown adipose tissue removal in the mouse.[7]
Platensimycin (PTM) is an antibiotic produced by S. platensis that inhibits Gram-positve bacteria by selectively inhibiting cellular lipid biosynthesis (IC50 = 0.1 μM). It targets the β-ketoacyl-acyl-carrier-protein synthase I/II, FabF/B, an enzyme that participates in the biosynthesis of fattyacids (IC50s = 48 and 160 nM for S. aureus and E. coli enzymes, respectively). By specifically targeting fattyacid synthesis in bacteria, PTM is thought to be a promising agent for overcoming antibiotic resistance. PTM is also a selective inhibitor of the mammalian fattyacid synthase and has been shown to reduce liver triglyceride levels and to improve insulin sensitivity in a diabetic mouse model after an oral dose of 30 mg/kg.
Peroxisome proliferator-activated receptors (PPARs) α, δ, γ are ligand-activated nuclear transcription factors involved in the regulation of energy homeostasis as well as insulin sensitivity and glucose metabolism. Pharmacologies of PPARδ receptor agonists, though relatively obscure, have recently been reported to elevate high-density lipoprotein (HDL) cholesterol and lower plasma triglyceride (TG) levels in obese insulin resistant rhesus monkeys. CAY10592 is a full PPARδ agonist (EC50 = 30 nM) in a fattyacid oxidation assay of rat L6 muscle cells with desirable oral pharmacokinetic properties. In a transactivation assay using human PPAR receptors, CAY10592 acts as a selective partial PPARδ agonist (EC50 = 53 nM) with no effect on PPARα or PPARγ activity up to 30 μM. Chronic treatment of high fat fed ApoB100/CETP-transgenic mice with CAY10592 at a dose of 20 mg/kg increases HDL levels, decreases LDL and TG levels, and improves insulin sensitivity.
ZLY032 is a dual agonist of free fattyacid receptor 1 (FFAR1 GPR40; EC50= 68 nM in a FLIPR assay) and peroxisome proliferator-activated receptor δ (PPARδ; EC50= 102 nM in a reporter assay).1It is selective for FFAR1 and PPARδ over PPARα and PPARγ (EC50s = >10 μM for both). ZLY032 (40 mg kg, twice per day) reduces blood glucose levels in an oral glucose tolerance test and decreases plasma total cholesterol and triglyceride levels in theob obmouse model of metabolic disease.2It reduces hepatic steatosis and plasma alanine transaminase (ALT) and aspartate aminotransferase (AST) levels in a mouse model of non-alcoholic steatohepatitis (NASH) induced by a methionine and choline-deficient diet at the same dose. 1.Li, Z., Chen, Y., Zhou, Z., et al.Discovery of first-in-class thiazole-based dual FFA1 PPARδ agonists as potential anti-diabetic agentsEur. J. Med. Chem.164352-365(2019) 2.Li, Z., Zhou, Z., Hu, L., et al.ZLY032, the first-in-class dual FFA1 PPARδ agonist, improves glucolipid metabolism and alleviates hepatic fibrosisPharmacol Res.159105035(2020)
Highly selective orally active peroxisome proliferator-activated receptor (PPAR)γ agonist (pEC50 values are 8.05, < 4 and < 4 for human PPARγ, PPARα and PPARδ receptors respectively). Decreases glucose, fattyacid and triglyceride levels following oral administration in vivo. Brown et al (1999) A novel N-aryl tyrosine activator of peroxisome proliferator-activated receptor-γ reverses the diabetic phenotype of the Zucker diabetic fatty rat. Diabetes 48 1415 PMID:10389847 |Nugent et al (2001) Potentiation of glucose uptake in 3T3-L1 adipocytes by PPARγ agonists is maintained in cells expressing a PPARγ dominant-negative mutant: evidence for selectivity in the downstream responses to PPARγ activation. Mol.Endocrinol. 15 1729 PMID:11579205 |Way et al (2001) Adipose tissue resistin expression is severely suppressed in obesity and stimulated by peroxisome proliferator-activated receptor γ agonists. J.Biol.Chem. 276 25651 PMID:11373275
Ethyl dihomo-γ-linolenic acid ethyl ester (ethyl DGLA), an ω-6 fattyacid intermediate ester form, elevates prostaglandin E1(PGE1) and PGE2 secretion in rabbit renal papilla when administered dietarily at a dosage of 1 g kg per day for 25 days. Additionally, this dosage of ethyl DGLA increases triglyceride levels and enhances the proportion of 20:3ω6 and 20:4ω6 phospholipids in the renal medulla of rabbits. Ethyl DGLA formulations have been employed in managing eczema and inflammatory disorders.
1,2,3-Tritricosanoyl glycerol, a triacylglycerol containing tricosanoic acid at the sn-1, sn-2, and sn-3 positions, serves as an internal standard for the quantification of fattyacids within the triglyceride component of human aortic endothelial cells (HAECs) cultured in media supplemented with stearic and or oleic acid.