cholesterol storage
Definition
Target type: biologicalprocess
The accumulation and maintenance in cells or tissues of cholesterol, cholest-5-en-3 beta-ol, the principal sterol of vertebrates and the precursor of many steroids, including bile acids and steroid hormones. [GOC:BHF, GOC:dph, GOC:tb]
Cholesterol storage is a complex biological process involving the uptake, transport, and accumulation of cholesterol within cells. The process begins with the absorption of dietary cholesterol from the small intestine, where it is incorporated into micelles and absorbed by enterocytes. Cholesterol is then packaged into chylomicrons, lipoprotein particles that transport it to the liver and other tissues. The liver plays a crucial role in cholesterol metabolism, synthesizing approximately 80% of the body's cholesterol. Cholesterol is transported throughout the body via lipoproteins, primarily low-density lipoproteins (LDLs) and high-density lipoproteins (HDLs). LDLs deliver cholesterol to cells, while HDLs transport excess cholesterol back to the liver for excretion. Within cells, cholesterol is stored in intracellular compartments called lipid droplets. These droplets are enclosed by a phospholipid monolayer and contain a variety of lipids, including cholesterol esters, triglycerides, and phospholipids. The formation and maintenance of lipid droplets involve a complex interplay of proteins, including Perilipin, Adipose triglyceride lipase (ATGL), and Hormone-sensitive lipase (HSL). These proteins regulate the hydrolysis of stored triglycerides and the release of free fatty acids and glycerol. The amount of cholesterol stored in cells is carefully regulated by a feedback mechanism. When intracellular cholesterol levels are high, the synthesis of new cholesterol is inhibited, and the uptake of LDL cholesterol is reduced. Conversely, when intracellular cholesterol levels are low, cholesterol synthesis is stimulated, and LDL uptake is increased. Cholesterol storage is essential for maintaining cell membrane fluidity and integrity, synthesizing steroid hormones, and producing bile acids. Dysregulation of cholesterol storage can lead to the accumulation of cholesterol in blood vessels, contributing to the development of atherosclerosis and cardiovascular disease.'
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Proteins (3)
| Protein | Definition | Taxonomy |
|---|---|---|
| Lysosomal acid lipase/cholesteryl ester hydrolase | A lysosomal acid lipase/cholesteryl ester hydrolase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P38571] | Homo sapiens (human) |
| Sterol O-acyltransferase 1 | A sterol O-acyltransferase 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P35610] | Homo sapiens (human) |
| Sterol O-acyltransferase 2 | A sterol O-acyltransferase 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O75908] | Homo sapiens (human) |
Compounds (33)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| diethyl pyrocarbonate | diethyl pyrocarbonate : The diethyl ester of dicarbonic acid. Diethyl Pyrocarbonate: Preservative for wines, soft drinks, and fruit juices and a gentle esterifying agent. | acyclic carboxylic anhydride | |
| procainamide | procainamide : A benzamide that is 4-aminobenzamide substituted on the amide N by a 2-(diethylamino)ethyl group. It is a pharmaceutical antiarrhythmic agent used for the medical treatment of cardiac arrhythmias. Procainamide: A class Ia antiarrhythmic drug that is structurally-related to PROCAINE. | benzamides | anti-arrhythmia drug; platelet aggregation inhibitor; sodium channel blocker |
| edrophonium chloride | edrophonium chloride : The chloride salt of edrophonium. A reversible inhibitor of cholinesterase with a rapid onset (30-60 seconds after injection) but a short duration of action (5-15 minutes), it is used in myasthenia gravis both diagnostically and to distinguish between under- or over-treatment with other anticholinesterases. It has also been used for the reversal of neuromuscular blockade in anaesthesia, and for the management of poisoning due to tetrodotoxin, a neuromuscular blocking toxin found in puffer fish and other marine animals. | chloride salt; quaternary ammonium salt | antidote; diagnostic agent; EC 3.1.1.8 (cholinesterase) inhibitor |
| territrem b | territrem B: tremorgenic mycotoxin from Aspergillus terreus; RN given refers to (4aR-(4aalpha,6abeta,12aalpha,12bbeta))-isomer | ||
| pd 128042 | PD 128042: structure given in first source | anilide | |
| cl 277082 | CL 277082: structure given in first source | ||
| 1,4-bis(4-methoxyphenyl)-3-(3-phenylpropyl)-2-azetidinone | 1,4-bis(4-methoxyphenyl)-3-(3-phenylpropyl)-2-azetidinone: an inhibitor of cholesterol absorption; structure given in first source | ||
| atractylenolide iii | atractylenolide III: from Atractylodes macrocephala Koidz; structure in first source | naphthofuran | metabolite |
| avasimibe | monoterpenoid | ||
| 22s-hydroxycholesterol | (22S)-22-hydroxycholesterol : An oxysterol that is the 22S-hydroxy derivative of cholesterol. | 22-hydroxy steroid; 3beta-hydroxy-Delta(5)-steroid; oxysterol | |
| f 1394 | F 1394: an acyl-CoA:cholesterol acyltransferase (ACAT) inibitor; structure given in first source | ||
| oleic acid | oleic acid : An octadec-9-enoic acid in which the double bond at C-9 has Z (cis) stereochemistry. Oleic Acid: An unsaturated fatty acid that is the most widely distributed and abundant fatty acid in nature. It is used commercially in the preparation of oleates and lotions, and as a pharmaceutical solvent. (Stedman, 26th ed) | octadec-9-enoic acid | antioxidant; Daphnia galeata metabolite; EC 3.1.1.1 (carboxylesterase) inhibitor; Escherichia coli metabolite; mouse metabolite; plant metabolite; solvent |
| beta-hydroxyisovalerylshikonin | |||
| shikonin | shikonin: a naphthazarin; has antineoplastic and angiogenesis inhibiting activities | hydroxy-1,4-naphthoquinone | |
| carbenoxolone | |||
| pactimibe | |||
| linoleic acid | linoleic acid : An octadecadienoic acid in which the two double bonds are at positions 9 and 12 and have Z (cis) stereochemistry. Linoleic Acid: A doubly unsaturated fatty acid, occurring widely in plant glycosides. It is an essential fatty acid in mammalian nutrition and is used in the biosynthesis of prostaglandins and cell membranes. (From Stedman, 26th ed) | octadecadienoic acid; omega-6 fatty acid | algal metabolite; Daphnia galeata metabolite; plant metabolite |
| oleylamide | aliphatic amide : A carboxamide in which the amide linkage is bonded directly to an aliphatic system. oleamide : A fatty amide derived from oleic acid. oleylamide: plastic additive; can cause contact urticaria; RN given refers to (Z)-isomer; a sleep inducing factor | primary fatty amide | human metabolite; plant metabolite |
| muromonab-cd3 | cudraflavone B : An extended flavonoid that consists of a pyranochromane skeleton that is 2H,6H-pyrano[3,2-g]chromen-6-one substituted by geminal methyl groups at position 2, a 2,4-dihydroxyphenyl group at position 8, a hydroxy group at position 5 and a prenyl group at position 7. Isolated from Morus alba and Morus species it exhibits anti-inflammatory activity. cudraflavone B: antiproliferative from Cudrania tricuspidata | extended flavonoid; pyranochromane; trihydroxyflavone | anti-inflammatory agent; plant metabolite |
| macluraxanthone b | macluraxanthone B : A member of the class of xanthones that is 9H-xanthen-9-one substituted by hydroxy groups at positions 1, 3, 6 and 7, a dimethylallyl group at position 2 and a prenyl group at position 4. Isolated from Maclura tinctoria and Cudrania tricuspidata, it exhibits anti-HIV and antineoplastic activity. macluraxanthone B: from the plant Maclura tinctoria; structure in first source | phenols; xanthones | anti-HIV agent; antineoplastic agent; metabolite |
| oleoylanilide | oleoylanilide: alters lipid metabolism of lung & adipose tissue; do not confuse with oleoanilide; RN given refers to (Z)-isomer oleylanilide : The fatty amide resulting from the formal condensation of oleic acid and aniline. | anilide; fatty amide | |
| Pipercide | benzodioxoles | ||
| linoleamide | linoleamide : A fatty amide obtained from linoleic acid. linoleamide: C18-H33-N-O | primary fatty amide | human metabolite |
| manzamine a | manzamine A : An alkaloid of the class of beta-carbolines isolated from Haliclona and Acanthostrongylophora. It exhibits inhibitory activity against Glycogen Synthase Kinase-3 (EC 2.7.11.26). manzamine A: RN given refers to (1R-(1R*,9Z,13S*,13aR*,20aR*,21aR*)-isomer; RN for cpd without isomeric designation not avail 12/92 | alkaloid; beta-carbolines; isoquinolines | animal metabolite; anti-HSV-1 agent; antimalarial; antineoplastic agent; EC 2.7.11.26 (tau-protein kinase) inhibitor; marine metabolite |
| eflucimibe | eflucimibe: a powerful and systemic acylcoenzyme A: cholesterol acyltransferase inhibitor | ||
| arisugacin | arisugacin A : An organic heterotetracyclic compound that is 4a,12a-dihydroxy-4,4,6a,12b-tetramethyl-4a,6,6a,12,12a,12b-hexahydro-4H,11H-benzo[f]pyrano[4,3-b]chromene-1,11(5H)-dione substituted by 3,4-dimethoxyphenyl group at position 9 (the 4aR,6aR,12aS,12bS steroisomer). Isolated from the culture broth of Penicillium, it acts as a selective inhibitor of acetylcholinesterase. arisugacin: isolated from Penicillium sp. FO-4259; structure given in first source | aromatic ether; delta-lactone; enone; organic heterotetracyclic compound; tertiary alcohol | antimicrobial agent; EC 3.1.1.7 (acetylcholinesterase) inhibitor; metabolite; Penicillium metabolite |
| manassantin b | manassantin B : A lignan isolated from Saururus cernuus and Saururus chinensis and has been shown to exhibit antineoplastic activity. manassantin B: isolated from the roots of Saururus chinensis; structure in first source | benzodioxoles; dimethoxybenzene; lignan; oxolanes; secondary alcohol | antineoplastic agent; metabolite |
| cudraxanthone l | cudraxanthone L: from the root bark of Cudrania tricuspidata; structure in first source | ||
| pyripyropene a | pyripyropene A : A sesquiterpenoid that consists of (3S,4R,4aR,6S,6aS,12R,12aS,12bS)-4-(acetoxymethyl)-12-hydroxy-4,6a,12b-trimethyl-11-oxo-9-(pyridin-3-yl)-1,3,4,4a,5,6,6a,12,12a,12b-decahydro-2H,11H-benzo[f]pyrano[4,3-b]chromene-3,6-diol in which the hydrogens of the 3- and 6-hydroxy functions are substituted by acetyl groups. pyripyropene A: from Aspergillus fumigatus FO-1289; structure given in first source | organic heterotetracyclic compound; sesquiterpenoid | acyl-CoA:cholesterol acyltransferase 2 inhibitor; metabolite |
| cudraflavanone a | cudraflavanone A: antineoplastic from Cudrania tricuspidata; structure in first source | ||
| azd7687 | AZD7687: structure in first source | ||
| manassantin a | manassantin A : A lignan isolated from Saururus cernuus and Saururus chinensis and has been shown to exhibit antineoplastic activity. manassantin A: a dineolignan from Saururus cernuus; structure in first source | ||
| lalistat 2 |