Steroids

Withanolide A is an orally active extract from the Indian herb Ashwagandha. Withanolide A can induce apoptosis. Withanolide A has anti-inflammatory and antitumor activity. Withanolide A can be used in the study of neurodegenerative diseases.

24-Methylenecholesterol (Ostreasterol) is a regulator targeting acyl-CoA cholesterol acyltransferase (ACAT) with anti-aging and neuroprotective effects. 24-Methylenecholesterol mimics the effects of nerve growth factor (NGF), can extend yeast lifespan through an anti-oxidative stress mechanism, and exhibits neuroprotective activity in PC12 cells. 24-Methylenecholesterol can reduce intracellular reactive oxygen species (ROS) and malondialdehyde (MDA) levels, activate anti-oxidative stress pathways (such as UTH1, SOD-related genes), and promote synaptic growth.

Erythrodiol is an olive oil component. Erythrodiol promotes Cholesterol efflux (ChE) by selectively inhibiting the degradation of ABCA1 protein. Erythrodiol is a good candidate to be further explored for therapeutic or preventive application in the context of atherosclerosis.

Coprostanol (5β-Cholestan-3β-ol) is a fecal sterol formed by microbial reduction of cholesterol in the intestines of man and higher animals. Coprostanol can be used as an indicator sterol of fecal pollution. Coprostanol has been recognized as a good indicator of pollution of water resources by sewage discharges. Coprostanol can serve as a potential biological indicator for cerebral chondrodystrophy (CTX).

Neoruscogenin, a member of the steroidal sapogenin family, is a high-affinity agonist of the nuclear receptor RORα (NR1F1) (EC₅₀ = 0.11 µM).

Prednisone acetate (Prednisone 21-acetate), a glucocorticoid, is an orally active Notch inhibitor. Prednisone acetate has anti-inflammatory activity and can enhance the immune response.

Squalamine (MSI-1256) is an aminosterol compound with broad-spectrum antiviral activity. Squalamine makes cells less conducive to certain viral replication by altering the electrostatic interactions in the inner membrane of host cells. Squalamine also has antibacterial and antitumor activities. Squalamine has broad-spectrum antibacterial activity against Gram-negative and Gram-positive bacteria, fungi and protozoa. Squalamine inhibits tumor-related angiogenesis and the growth of human breast cancer cells. Squalamine restores the function of enteric nervous system in Parkinson^,s disease mouse models.

11-Ketotestosterone (11-Oxotestosterone), an oxidized form of Testosterone, is an active androgen.

Estradiol 17-(β-D-Glucuronide) is a D-ring glucuronide metabolite of natural estrogen formed in the liver. Estradiol 17-(β-D-Glucuronide) is a substrate of the organic anion-transporting polypeptide family (Oatp) and multidrug resistance-associated protein 2 (Mrp2). Estradiol 17-(β-D-Glucuronide) regulates MRP8-mediated transport processes and inhibits MRP8-mediated transport of dehydroepiandrosterone 3-sulfate and taurocholic acid. Estradiol 17-(β-D-Glucuronide) induces immediate, reversible reduction of bile flow and acute intrahepatic cholestasis in female rats without altering the bile acid composition in bile. Estradiol 17-(β-D-Glucuronide) can be used in studies related to intrahepatic cholestasis.

Pregnenolone monosulfate (3β-Hydroxy-5-pregnen-20-one monosulfate) is a powerful neurosteroid, the main precursor of various steroid hormones including steroid ketones. Pregnenolone monosulfate acts as a signaling-specific inhibitor of cannabinoid CB1 receptor, inhibits the effects of tetrahydrocannabinol (THC) that are mediated by the CB1 receptors. Pregnenolone monosulfate can protect the brain from cannabis intoxication. Pregnenolone monosulfate is also a TRPM3 channel activator, and also can weakly activate TRPM1 channels.

11beta-Hydroxyprogesterone is a potent inhibitors of 11β-Hydroxysteroid dehydrogenase; also activates human mineralocorticoid receptor in COS-7 cells with an ED₅₀ of 10 nM.

Protodioscin, a major steroidal saponin in Trigonella foenum-graecum Linn., has been shown to exhibit multiple biological actions, such as anti-hyperlipidemia, anti-cancer, sexual effects and cardiovascular properties.

Cucurbitacin E is a CDK1 inhibitor that significantly inhibits the activity of the cyclin B1/CDC2 complex. Cucurbitacin E also induces PANoptosis in adrenocortical carcinoma cells in a ZBP1-dependent manner. Cucurbitacin E exhibits synergistic effects with Mitotane (HY-13690); when used in combination, they effectively eliminate tumors.

Norethindrone is a female progestin approved by FDA for the treatment of endometriosis, uterine bleeding caused by abnormal hormone levels, and secondary amenorrhea.

Prednisolone disodium phosphate is a synthetic glucocorticoid with anti-inflammatory and immunomodulating properties. Prednisolone disodium phosphate can be rapidly and completely hydrolyzed to Prednisolone in the plasma.

11-Dehydrocorticosterone is a endogenous corticosteroid. 11-Dehydrocorticosterone can be a source of transcriptionally active glucocorticoid in cardiac myocytes and fibroblasts. 11-Dehydrocorticosterone can increase SGK mRNA expression in cardiac fibroblast.

11-Beta-hydroxyandrostenedione (4-Androsten-11β-ol-3,17-dione) is a steroid mainly found in the the adrenal origin (11β-hydroxylase is present in adrenal tissue, but absent in ovarian tissue). 11-Beta-hydroxyandrostenedione is a 11β-hydroxysteroid dehydrogenase (11βHSD) isozymes inhibitor. As 4-androstenedione increases, measuring plasma 11-Beta-hydroxyandrostenedione can distinguish the adrenal or ovarian origin of hyperandrogenism.

Tetrahydrocortisone is a corticosteroid catalyzed from endogenous glucocorticoids by AKR1D1 (5_β-reductase). Its formation is mediated by AKR1D1 and regulated by the glucocorticoid receptor (GR). As one of the final products of glucocorticoid inactivation metabolism, Tetrahydrocortisone participates in the maintenance of glucocorticoid metabolic homeostasis in vivo. Tetrahydrocortisone can be used for mechanistic studies of metabolic diseases such as non-alcoholic fatty liver disease (NAFLD) and type 2 diabetes, and also serves as a biomarker for in vivo AKR1D1 activity and glucocorticoid metabolic status.

Ponasterone A (25-Deoxyecdysterone), an ecdysteroid, has strong affinity for the ecdysone receptor. Ponasterone A is a potent regulator of gene expression in cells and transgenic animals, enabling reporter genes to be turned on and off rapidly.

7α-Hydroxy-4-cholesten-3-one is an intermediate in synthesis of bile acids from cholesterol. 7α-Hydroxy-4-cholesten-3-one is a pregnane X receptor (PXR) agonist. 7α-Hydroxy-cholest-4-en-3-one is a biomarker for bile acid loss, irritable bowel syndrome, and other diseases associated with defective bile acid biosynthesis. 7α-Hydroxy-cholest-4-en-3-one is the physiological substrate for CYP8B1.