metabolic product

Pregnanediol (5Beta-Pregnane-3Alpha,20alpha-Diol) 是一种黄体酮的主要代谢物 (metabolite)，能够通过尿液排出。它提供了一种间接测定体内孕激素水平的方法。

Dulcite (D-Galactitol) 是一种具有微甜味的糖醇，其是半乳糖的代谢分解产物。

Suberic acid (1,8-Octanedioic acid) 被发现和肉毒碱-甲酰基-丙氨酸转位酶缺乏(丙二醇-羧基酶缺乏症)有关。

FAPy-adenine HCl 是一种注意力缺陷多动综合征的代谢标记物，是 ROS 诱导 DNA 损伤的诱变产物。

RO-1-5237 是 Pyridostigmine Bromide 的一个代谢产物，具有胆碱能特性，主要应用于重症肌无力的相关研究中。

Ferroxamine 是一种代谢产物，由大肠杆菌产生或存在于其中。

Clofarabine-5'-diphosphatetrisodium (Clofarabine-DP trisodium) 是 Clofarabine-5'-diphosphate 的钠盐。Clofarabine 经脱氧胞苷激酶 (dCK) 磷酸化后生成 Clofarabine-5'-diphosphate trisodium，这个代谢产物能够进一步被磷酸化为 Clofarabine-5'-triphosphate，并在癌细胞中通过抑制 DNA 合成及 DNA 修复显现细胞毒性。

(1S)-Calcitriol (1α,25-Dihydroxy-3-epi-vitamin-D3) is a natural metabolite of 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3). (1S)-Calcitriol exhibits potent vitamin D receptor (VDR)-mediated actions such as inhibition of keratinocyte growth or suppression of parathyroid hormone secretion[1]. 3‐epi‐Calcitroic acid is an end product of (1S)-Calcitriol (1α,25-Dihydroxy-3-epi-vitamin-D3; 3‐epi‐1a,25(OH)2D3) metabolism by rat CYP24A1[1]. [1]. Steve Y Rhieu, et al. Metabolic stability of 3-epi-1α,25-dihydroxyvitamin D3 over 1 α 25-dihydroxyvitamin D3: metabolism and molecular docking studies using rat CYP24A1. J Cell Biochem. 2013 Oct;114(10):2293-305.

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)

Prostaglandin D1 (PGD1) is the theoretical D-series metabolite of dihomo-γ-linolenic acid (DGLA), but to date it has not been isolated as a natural product. It is an inhibitor of ADP-induced platelet aggregation in humans with an IC50 value of 320 ng/ml, about 1/10 as potent as PGD2. 13,14-dihydro-15-keto Prostaglandin D1 (13,14-dihydro-15-keto PGD1) is the theoretical metabolite of PGD1 via the 15-hydroxy PG dehydrogenase metabolic pathway. No biological studies for this compound have been reported.

Steryl glucosides are neutral glycolipids commonly found in plant cell membranes and vegetable oils that contain a glucose moiety conjugated to a sterol lipid. They function as glucose donors in the biosynthesis of glucocerebrosides in plant microsomes and are metabolic precursors to acylated esterified steryl glucosides. Steryl glucosides are the major component of filter- and engine-damaging precipitates formed during biodiesel production from transesterification of vegetable oils. This product contains a mixture of steryl glucosides.

12(S)-HETE is a product of arachidonic acid metabolism through the 12-lipoxygenase pathway. It is primarily found in platelets, leukocytes, and to a lesser extent in smooth muscle cells. It enhances tumor cell adhesion to endothelial cells, fibronectin, and the subendothelial matrix. tetranor-12(S)-HETE is the major β-oxidation product resulting from peroxisomal metabolism of 12(S)-HETE in numerous tissues, and Lewis lung carcinoma cells. No biological function has yet been determined for tetranor-12(S)-HETE. Some data indicate it may play a role in controlling the inflammatory response in injured corneas. In some diseases (e.g., Zellweger's Syndrome) peroxisomal abnormalities result in the inability of cells to metabolize 12(S)-HETE, which may be responsible for symptoms of the disease. The tetranor derivative of 12(S)-HETE is available as a research tool for the elucidation of the metabolic fate of its parent compound.

Galactosylcerebrosides are glycosphingolipids that contain a galactose attached to a ceramide acylated with a hydroxy or non-hydroxy fatty acid. They are metabolic precursors to sulfatides , found primarily in nerve tissues, and are the main glycosphingolipids in the central nervous system. Galactosylcerebrosides are involved in a multitude of cellular processes including cell agglutination, cellular signaling in glycosynapses, cellular development, and activation of T cells. They accumulate in globoid cells in the brain of patients with Krabbe disease, a disorder characterized by a deficiency in galactosylcerebrosidase activity. This product is a mixture of isolated bovine hydroxy galactosylcerebrosides.

Galactosylcerebrosides are glycosphingolipids that contain a galactose attached to a ceramide acylated with a hydroxy or non-hydroxy fatty acid. They are metabolic precursors to sulfatides , found primarily in nerve tissues, and are the main glycosphingolipids in the central nervous system. Galactosylcerebrosides are involved in a multitude of cellular processes including cell agglutination, cellular signaling in glycosynapses, cellular development, and activation of T cells. They accumulate in globoid cells in the brain of patients with Krabbe disease, a disorder characterized by a deficiency in galactosylcerebrosidase activity. This product is a mixture of isolated bovine non-hydroxy galactosylcerebrosides.

20-hydroxy Prostaglandin E2 (20-hydroxy PGE2) is a product of cytochrome P450 metabolism of PGE2 . ω-Oxidation at C-20 followed by β-oxidation and the loss of up to four carbons from the lower side chain is a prominent metabolic pathway for PGE2. 20-hydroxy PGE2 is the putative first intermediate in this chain of chemical transformations.

Androsterone 是睾酮的代谢产物，可以激活法尼醇 X 受体。

Xylobiose 是一种木糖单体的二糖，单体之间具有 β-1, 4 键。

Demethoxycurcumin (Desmethoxycurcumin) 是姜黄素的主要活性成分，有抗炎和抗癌作用。

D-Ribose 5-phosphate disodium dihydrate 参与磷酸戊糖途径，是磷酸戊糖途径的中间产物，可用于研究由核黄素缺乏引起的眼部疾病和内分泌与代谢疾病。

α,α-Trehalose 6-phosphate (Tre6P) potassium 是一种α,α′-trehalose的6-磷酸衍生物及内源代谢物。在Tre6P磷酸酶 (T6PP) 的催化下，α,α-Trehalose 6-phosphate可被高效转化为α,α′-trehalose。

3-Methyl-L-histidine 是一种肉类尤其是鸡肉摄入和大豆制品摄入的生物标记。

Dendrogenin A (DDA) 作为一种选择性肝X受体(LXR)调节剂(SLiM)、胆固醇环氧水解酶(ChEH; Ki = 120 nM)的抑制剂及胆固醇的活性代谢产物，通过DDA合成酶将5,6α-环氧胆固醇与组胺结合形成。DDA在非癌性人乳腺上皮细胞和上皮黑色素细胞中存在，但在多种乳腺癌细胞或黑色素瘤细胞中未发现，且在分离的人乳腺肿瘤组织中仅以低水平存在。它抑制22(R)-羟基胆固醇诱导的LXRβ和LXRα激活(分别以IC50 = 76和362 nM)，但也是LXR的部分激动剂，在B16/F10小鼠黑色素瘤细胞中增加Nur77、NOR-1、LC3-I和LC3-II的蛋白水平。DDA选择性调节LXRα和LXRβ，而非孕烯X受体(PXR)、芳香烃受体(AhR)、维生素D受体(VDR)、维甲酸X受体γ(RXRγ)、维甲酸受体α(RARα)、过氧化物酶体增殖物激活受体α(PPARα)、PPARγ、糖皮质激素受体、雄激素受体、雌激素受体α(ERα)及ERβ在2.5 µM下。此外，DDA在2.5和5 µM的浓度下增加B16/F10和SK-MEL-28癌细胞中LC3-II的蛋白水平，并在2.5 µM时诱导这些细胞类型的自噬细胞死亡。DDA (0.37 µg/kg)在B16/F10小鼠黑色素瘤模型和TS/A小鼠乳腺癌模型中减缓肿瘤生长，并在体内外诱导癌细胞分化。

Etheroleic acid 表现出针对大麦幼苗第二片叶子上的B. graminis白粉病霉菌的抗真菌活性.此化合物为亚麻酸的一种代谢产物.

Androsterone-d4 是 Androsterone 的氘代化合物。Androsterone 的 CAS 号为 53-41-8。Androsterone 是睾酮的代谢产物，可以激活法尼醇 X 受体。