Steroids

Applications Exemestane-13C,D3 is the labeled analogue of Exemestane (E957000), an antineoplastic (hormonal). References Giudici, D., et al.: J. Steroid Biochem., 30, 391 (1988), Evans, T.R.J., et al.: Cancer Res., 52, 5933 (1992), Zilembo, N., et al.: Brit. J. Cancer, 72, 1007 (1995)

Applications Dexamethasone-d3 is the labelled form of Dexamethasone (D298800), which is a glucocorticoid used as an anti-inflammatory agent. Dexamethasone regulates T-cell survival, growth, and differentiation. Dexamethasone inhibits the induction of nitric oxide synthase. References Wershil, B.K., et al.: Int. Arch. Allergy Immunol., 107, 323 (1995), Riccardi, C., et al.: Cell Death Diff., 6, 1182 (1999), Llanos, S.L. and Roldan, A.: Bio Cell, 23, 29 (1999)

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Fusidic acid sodium salt (SQ-16360) is a sodium salt form of fusidic acid, a bacteriostatic antibiotic derived from the fungus Fusidium coccineum.

Oxygen-heterocyclic compound

Applications 4-Hydroxy Estrone 1-N3-Adenine is an estrogen metabolite formed with DNA which can lead to the mutations that initiate breast, prostate, and other types of cancer. The N3Ade depurinating adducts could serve as biomarkers to predict the risk of breast cancer. References Chakravarti, D., et al.: Mutat. Res., 456, 17 (2000), Liehr, J., et al.: Endocr. Rev., 21, 4054 (2000), Chakravarti, D., et al.: Oncogene, 20, 7945 (2001), Cavalieri, E., et al.: Chem. Res. Toxicol., 14, 1041 (2002),

Applications Dacuronium Bromide is a metabolite of neuromuscular blocking agent Pancuronium (P178500) with much weaker activity. References Marshall, I.G. et al.: Br. J. Anaesth., 55, 703 (1983); Norman, J. et al.: Br. J. Anaesth., 43, 313 (1971); Durant, N.N. et al.: J. Pharm. Pharmacol., 31, 831 (1979);

Applications Labelled 5β-Pregnane-3α,20α-diol, a metabolite of Progesterone (P755900). References Beall, et al.: Biochem. J., 31, 35 (1937); Okuda, A. et al.: J. Biol. Chem., 259, 7519 (1984); Russell, D. et al.: Biochemistry, 31, 4737 (1992); Kondo, K. et al.: Eur. J. Biochem.; 219, 357 (1994); Westerbacka, J. et al.: J. Clin. Endocrinol. Metab., 88, 4924 (2003);

Anti-inflammatory glucocorticoidDexamethasone is used to treat inflammatory and autoimmune conditions such as rheumatoid arthritis and bronchospasm. It is useful to study apoptosis, cell signaling pathways and gene expression. It is associated with marbofloxacin and clotrimazole and finds application in veterinary medicine to treat difficult ear infections in dogs. It is also used to treat horses with swelling of of distal limbs and general bruising in combination with trichlormethiazide. It is also an anti-inflammatory glucocorticoid. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Cinobufotalin is a main cardiac toxin in toad, it is a novel anti-HCC agent, it induces growth inhibition and apoptosis in cultured HCC cells through ceramide production. Cinobufotalin is also an effective reversal agent for the multidrug resistance of tumors, it can reverse the adriamycin-resistance in Raji/ADR cells and the expression of P-gp and MRP-1 proteins. Cinobufotalin can promote the dendritic cells(DCs) derived from peripheral blood of patients with chronic hepatitis B to mature and effectively enhance its(the DCs') capabilities, therefore the treatment of cinobufotalin may potentiate the antiviral immunity of the patients with chronic hepatitis B(CHB).

Anemarrhenasaponin Ia, an anti-inflammatory from Anemarrhenae, inhibits fMLP-induced superoxide.

Impurity Mometasone Impurity L Applications Dexamethasone intermediate. References Isogai, M., et al.: J. Steroid Biochem. Mol. Biol., 44, 141 (1993),

Cosyntropin (acetate) stimulates the release of corticosteroids such as cortisol from the adrenal gland.

Applications 2-Hydroxy-estrone-6-N3-adenine is a depurinating adduct that is created by the interaction of specific metabolites of estrogens in the body with DNA. Unfortunately, these adducts are endogenous initiators of various human cancers, such as breast & prostate. References Yang, L., et al.: Prostate, 69, 41 (2009); Zahid, M., et al.: Chem. Res. Toxicol., 19, 164 (2006); Zhang, Y., et al.: Metabol. Clin. Exp., 56, 887 (2007)

Applications Labelled (3β,5α)-4,4-Dimethylcholesta-8,14,24-trien-3-ol, a follicular fluid meiosis-activating sterol (FF-MAS); a factor present in the pre-ovulatory follicle during the time of oocyte maturation. (3β,5α)-4,4-Dimethylcholesta-8,14,24-trien-3-ol has been shown to protect young oocytes from precocious chromatid separation as well as protecting aged oocytes from predivision during maturation. References Cao, X. et al.: Biol. Reprod., 71, 1807 (2004); Cukurcam, S. et al.: Hum. Reprod., 22, 815 (2007); Bivens, C.L.M. et al.: Hum. Reprod. 19, 2340 (2004);

Applications 4-Methoxy-17beta-estradiol-1,2,16,16,17-d5 is a useful isotopically labeled compound of 4-Methoxy 17β-Estradiol (M262630)

Applications A metabolite of Cortisone (C696500). References Mashkovskii, M., et al.: Med. Agents, 2, 34 (2002),

Pancuronium dibromide (Pavulon), a competitive AChR antagonist, acts as a skeletal muscle relaxant. Pancuronium dibromide blocks neuromuscular transmission.

Applications Testosterone (T155000) derivative.

Applications Glucocorticoid receptor binding.A representative lots showed approximately 10% d8. References Gazdar, A., et al.: Cancer Res., 50, 5488, (1990), Bird, I., et al.: Endocrinology, 134, 2468 (1994), Auchus, R., et al.: J. Biol. Chem., 273, 3158 (1998), Dardis, A., et al.: J. Endocrinol., 179, 131 (2003),

Applications Cholesta-3,5-diene-7-one-25,26,26,26,27,27,27-d7 is a compound useful in organic synthesis.

Brassicasterol is a phytosterol, which is synthesized by various plant sources, particularly found in the seeds of plants such as rapeseed, mustard, and some algae. As a sterol, it is structurally similar to cholesterol but differs by having a methyl group at C24. This characteristic structure plays a vital role in its mode of action, modulating membrane fluidity and cell signaling pathways in organisms. In mammalian systems, brassicasterol may contribute to the reduction of cholesterol absorption by competing for incorporation into micelles, thus influencing metabolic pathways related to lipid processing and absorption. In a research context, brassicasterol is often utilized in studies investigating lipid metabolism, cardiovascular health, and its potential anti-inflammatory properties. It serves as a biomarker in environmental science due to its prevalence in marine settings and is used to trace phytoplankton biomass in aquatic ecosystems. Additionally, its role in modulating membrane dynamics makes it a subject of interest in cell biology and pharmacology, providing insights into the development of new therapeutic strategies targeting metabolic and cardiovascular disorders.

Cyproterone acetate (Cyproterone 17-O-acetate) binds the androgen receptor (AR), thereby preventing androgen-induced receptor activation in target tissues and

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Ecdysterone is an insect steroid hormone that induces apoptosis, cell proliferation, growth by controlling gene expression involved in molting and metamorphosis. And it is also used as a ecdysteroid in both plant and animal species that controls cell death. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Lactone

Methyl cholate, is used as a bile acid derivative as anti-inflammatory and antitumor agent. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications A corticosteroid prodrug for the treatment of eye disorders. References Benameur, H., et al.: J. Pharm. Pharmacol., 47, 812 (1995), Tauchi, Y., et al.: Biol. Pharm. Bull., 24, 925 (2001), Chono, S., et al.: J. Drug Targeting, 13, 407 (2005),

Applications The more active Zearalenone (Z270500) metabolite. Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package References Olsen, M., et al.: Acta Pharmacol. Toxicol., 48, 15 (1981), Chang, W., et al.: Food Chem. Toxicol., 22, 887 (1984), El Golli, E., et al.: Toxicol Lett., 166, 122 (2006), Hassen, W., et al.: Toxicology, 232, 294 (2007), Benzoni, E., et al.: Reprod. Toxicol., 25, 461 (2008),

24-epi-Castasterone is a brassinosteroid, which is a class of plant steroids, often extracted from various plant tissues synthesized in small quantities. This compound is primarily derived from plant sources such as seeds, pollen, and young vegetative tissues. It functions by binding to specific receptor kinases on plant cell membranes, thereby initiating a cascade of intracellular signaling that regulates gene expression. These pathways are crucial for the modulation of plant growth and development processes. Its applications are extensive within the realm of plant physiology research, where it is utilized to study the regulation of growth, differentiation, and adaptation mechanisms in plants. Additionally, 24-epi-castasterone plays a pivotal role in research focused on enhancing stress tolerance, investigating hormonal interactions, and improving overall plant health and yield. Understanding its specific modes of action and effects contributes significantly to advancements in agricultural biotechnology and plant biology fields.

Applications It is one of the labelled mono-hydroxylated metabolite of Stanozolol (S684500), an internal standard in doping analysis. References Chung, B., et al.: J. Anal. Toxicol., 14, 91(1990), Schanzer, W., et al.: J. Steroid Biochem., 36, 153 (1990), Phillis, B., et al.: Eur. J. Pharmacol., 398, 263 (2000),