Isotope-Labeled Steroids

2-Hydroxyestrone-d₄ is the deuterium labeled 2-Hydroxyestrone. 2-Hydroxyestrone (Catecholestrone) is a specific receptor-mediated antiestrogenic agent. 2-Hydroxyestrone is anticarcinogenic.

Estriol-d₃ is the deuterium labeled Estriol. Estriol is an antagonist of the G-protein coupled estrogen receptor in estrogen receptor-negative breast cancer cells.

4-Hydroxyestrone (4-OHE1)-d₄ is the deuterium labeled 4-Hydroxyestrone (HY-W009300). 4-Hydroxyestrone is a brain-penetrant estrogen metabolite. 4-Hydroxyestrone shows neuroprotective effects involving increased cytoplasmic localization of p53 resulting from SIRT1-mediated p53 deacetylation. 4-Hydroxyestrone relies on PDI to mediate its protective effect against chemically induced ferroptosis in estrogen receptor-negative cancer cells. 4-Hydroxyestrone inhibits lipid peroxidation and lipid-ROS accumulation. 4-Hydroxyestrone blocks preovulatory luteinizing hormone surges in Rattus norvegicus. 4-Hydroxyestrone can be used for the researches of neurodegeneration, breast cancer and endocrine disease.

Cholesteryl palmitate-d₇ is deuterium labeled Cholesteryl palmitate. Cholesteryl palmitate is a useful prognostic biomarker for chronic interstitial pneumonia (CIP).

Norethindrone-d₆ is the deuterium labeled Norethindrone. Norethindrone is a female progestin approved by FDA for the treatment of endometriosis, uterine bleeding caused by abnormal hormone levels, and secondary amenorrhea. Norethindrone-d6 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

5a-Pregnane-3,20-dione-d₆ is the deuterium labeled 5a-Pregnane-3,20-dione. 5a-Pregnane-3,20-dione is the endogenous progesterone metabolite.

7α-Hydroxy-4-cholesten-3-one-d₇ is the deuterium labeled 7α-Hydroxy-4-cholesten-3-one. 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.

Hydrocortisone-d₇ is the deuterium labeled Hydrocortisone. Hydrocortisone (Cortisol) is a steroid hormone or glucocorticoid secreted by the adrenal cortex.

Cholesterol-¹³C₃ is the ¹³C-labeled Cholesterol. Cholesterol is the major sterol in mammals. It is making up 20-25% of structural component of the plasma membrane. Plasma membranes are highly permeable to water but relatively impermeable to ions and protons. Cholesterol plays an important role in determining the fluidity and permeability characteristics of the membrane as well as the function of both the transporters and signaling proteins. Cholesterol is also an endogenous estrogen-related receptor α (ERRα) agonist.

Tetrahydrodeoxycorticosterone-d₃ is the deuterium labeled Tetrahydrodeoxycorticosterone. Tetrahydrodeoxycorticosterone, an neurosteroid, is a potent positive allosteric modulator (PAM) of GABAA receptor. Tetrahydrodeoxycorticosterone has potent neuroinhibitory properties.

5α-Androstenone-d₄ is the deuterium labeled 5α-Androstenone.

11-Ketodihydrotestosterone-d₃ is the deuterium labeled 11-Ketodihydrotestosterone. 11-Ketodihydrotestosterone (11-KDHT; 5α-Dihydro-11-keto testosterone) is an endogenous steroid and a metabolite of 11β-Hydroxyandrostenedione. 11-Ketodihydrotestosterone is an active androgen and is also a potent androgen receptor (AR) agonist with a K_i of 20.4 nM and an EC₅₀ of 1.35 nM for human AR. 11-Ketodihydrotestosterone drives gene regulation, protein expression and cell growth in androgen-dependent prostate cancer cells.

Pregnanediol-d₅ is the deuterium labeled Pregnanediol. Pregnanediol is the major metabolite of progesterone and can be excreted via urine. Pregnanediol offers an indirect way to measure progesterone levels in vivo.

Cholesterol-d1 is the deuterium labeled Cholesterol. Cholesterol is the major sterol in mammals. It is making up 20-25% of structural component of the plasma membrane. Plasma membranes are highly permeable to water but relatively impermeable to ions and protons. Cholesterol plays an important role in determining the fluidity and permeability characteristics of the membrane as well as the function of both the transporters and signaling proteins. Cholesterol is also an endogenous estrogen-related receptor α (ERRα) agonist.

7-Dehydrocholesterol-d₇ is the deuterium labeled 7-Dehydrocholesterol. 7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.

Dexamethasone-d₅ is the deuterium labeled Dexamethasone. Dexamethasone (Hexadecadrol) is a glucocorticoid receptor agonist. Dexamethasone also significantly decreases CD11b, CD18, and CD62L expression on neutrophils, and CD11b and CD18 expression on monocytes. Dexamethasone is highly effective in the control of COVID-19 infection. Dexamethasone inhibits production of exosomes containing inflammatory microRNA-155 in lipopolysaccharide-induced macrophage inflammatory responses.

Hydrocortisone-d₂ is the deuterium labeled Hydrocortisone. Hydrocortisone (Cortisol) is a steroid hormone or glucocorticoid secreted by the adrenal cortex.

5α-Cholestan-3β-ol-d₅ is the deuterium labeled 5α-Cholestan-3β-ol. 5α-Cholestan-3β-ol is a derivitized steroid compound.

Ethynyl Estradiol-¹³C₂ is the ¹³C-labeled Ethynyl Estradiol. Ethynyl Estradiol-13C2 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

Cholesterol stearate-d₆ is the deuterium labeled Cholesterol stearate.