Isotope-Labeled Steroids

16α-Hydroxydehydroepiandrosterone-d₆ (16α-Hydroxy-DHEA-d₆) is the deuterium labeled 16α-Hydroxydehydroepiandrosterone.

Campesterol-d₇ ((24R)-5-Ergosten-3β-ol-d₇) is the deuterium labeled Campesterol. Campesterol is a plant sterol with cholesterol lowering and anticarcinogenic effects.

Pregnanediol 3-glucuronide is the main end-metabolite of Progesterone (HY-N0437). Pregnanediol 3-glucuronide is a metabolite of Progesterone formed by hydroxylation and glucuronidation in the liver, with high hydrophilicity and easy excretion through urine. Pregnanediol 3-glucuronide excretion rate of ≥ 9 μmol/24 h can serve as biochemical evidence of ovulation. Pregnanediol 3-glucuronide reflects the quality of the luteal phase, and a level of < 7 μmol/24 h may indicate anovulation or luteal insufficiency. Pregnanediol 3-glucuronide holds significant importance in monitoring female reproductive health, assessing pregnancy, and diagnosing endocrine disorders.

15:0 Cholesteryl ester-d₇ is deuterium labeled 15:0 Cholesteryl ester.

Spironolactone-d₆-1 is the deuterium labeled Spironolactone (HY-B0561). Spironolactone is an aldosterone antagonist that acts on the aldosterone mineralocorticoid receptor (IC₅₀=24 nM) and androgen receptor (IC₅₀=77 nM), promotes podocyte autophagy and regulates pain. Spironolactone improves hypertension-related vascular hypertrophy and remodeling by reducing angiotensin II (Ang II)-induced inflammation, reduces aldosterone-induced vascular and soft tissue calcification through PIT1-dependent signaling, and alleviates vascular dysfunction in type II diabetic mice by reducing oxidative stress and restoring NO/GC signaling; at low concentrations, it and its metabolites can interfere with aldosterone biosynthesis in the adrenal cortex and inhibit voltage-dependent Ca²⁺ channels to exert antihypertensive effects.

DHEA-d₅ (Prasterone-d₅; Dehydroisoandrosterone-d₅; Dehydroepiandrosterone-d₅) is the deuterium labeled DHEA (HY-14650). DHEA (Prasterone) is one of the most abundant steroid hormones. DHEA (Prasterone) mediates its action via multiple signaling pathways involving specific membrane receptors and via transformation into androgen and estrogen derivatives (e.g., androgens, estrogens, 7α and 7β DHEA, and 7α and 7β epiandrosterone derivatives) acting through their specific receptors.

Zymosterol-d₅ is deuterium labeled Zymosterol.

Fludrocortisone acetate-d₅ is deuterium labeled Fludrocortisone acetate.

Methylprednisolone-d₃ is the deuterium labeled Methylprednisolone. Methylprednisolone is a synthetic corticosteroid with anti-inflammatory and immunomodulating properties. Methylprednisolone improve severe or critical COVID-19 by activating ACE2 and reducing IL-6 levels.

Methylprednisolone-d₇ is deuterium labeled Methylprednisolone. Methylprednisolone is a synthetic corticosteroid with anti-inflammatory and immunomodulating properties. Methylprednisolone improve severe or critical COVID-19 by activating ACE2 and reducing IL-6 levels.

Alpha-Estradiol-d₂ is the deuterium labeled Alpha-Estradiol. Alpha-Estradiol is a weak estrogen and a 5α-reductase inhibitor which is used as a topical medication in the treatment of androgenic alopecia.

Cholestenone-¹³C₂ is the ¹³C labeled Cholestenone. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells.

Cholestenone-¹³C is the ¹³C labeled Cholestenone. Cholestenone (4-Cholesten-3-one), the intermediate oxidation product of cholesterol, is metabolized primarily in the liver. Cholestenone is highly mobile in membranes and influences cholesterol flip-flop and efflux. Cholestenone may cause long-term functional defects in cells.

Cholesteryl palmitate-d₉ is the deuterium labeled Cholesteryl palmitate. Cholesteryl palmitate is a useful prognostic biomarker for chronic interstitial pneumonia (CIP).

Spironolactone-d₃ is the deuterium labeled Spironolactone. Spironolactone (SC9420) is an orally active aldosterone mineralocorticoid receptor antagonist with an IC₅₀ of 24 nM. Spironolactone is also a potent antagonist of androgen receptor with an IC₅₀ of 77 nM. Spironolactone promotes autophagy in podocytes.

Pregnenolone-¹³C₂,d₂ is the deuterium and ¹³C labeled Pregnenolone (HY-B0151). Pregnenolone is a powerful neurosteroid, the main precursor of various steroid hormones including steroid ketones. Pregnenolone acts as a signaling-specific inhibitor of cannabinoid CB1 receptor, inhibits the effects of tetrahydrocannabinol (THC) that are mediated by the CB1 receptors. Pregnenolone can protect the brain from cannabis intoxication. Pregnenolone is also a TRPM3 channel activator, and also can weakly activate TRPM1 channels.

Medroxyprogesterone-d₃ is the deuterium labeled Medroxyprogesterone. Medroxyprogesterone is a progestin, a synthetic variant of the human hormone progesterone and a potent progesterone receptor agonist.

Progesterone-¹³C₃ is the ¹³C-labeled Progesterone. Progesterone is a steroid hormone that regulates the menstrual cycle and is crucial for pregnancy.

17α-Hydroxyprogesterone-¹³C₃ is the ¹³C-labeled 17α-Hydroxyprogesterone. 17α-Hydroxyprogesterone (17-Hydroxyprogesterone) is an endogenous progestogen as well as chemical intermediate in the biosynthesis of other steroid hormones, including the corticosteroids and the androgens and the estrogens.

Estrone-¹³C₃ is the ¹³C-labeled Estrone. Estrone (E1) is a natural estrogenic hormone. Estrone is the main representative of the endogenous estrogens and is produced by several tissues, especially adipose tissue. Estrone is the result of the process of aromatization of androstenedione that occurs in fat cells.