CGP-53153 is a steroidal inhibitor of 5 alpha reductase with IC50s of 36 and 262 nM in rat and human prostatic tissue, respectively.
Stigmasterol glucoside is a sterol isolated from P. urinaria with high antioxidant and anti-inflammatory activities[1], act as an inhibitor of 5α-reductase with an IC50 of 27.2 µM[2].
Pedunculagin is a potent 5α-reductase type 1 inhibitor. Pedunculagin inhibits nitric oxide (NO), IL-6, IL-8 production. Pedunculagin decreases the protein expression of 5α-reductase. Pedunculagin shows anti-inflammatory activity[1].
Finasteride-d9 is deuterium labeled Finasteride. Finasteride (MK-906) is a potent and competitive 5α-reductase inhibitor, with an IC50 of 4.2 nM for type II 5α-reductase. Finasteride has approximately a 100-fold greater affinity for type II 5α-reductase enzyme than for the type I enzyme. Finasteride can be used for the research of benign prostatic hyperplasia (BPH) and androgenic alopecia[1][2][3].
12-O-Methylcarnosic acid (12-Methoxycarnosic acid), a diterpene carnosic acid isolated from the acetone extract of Salvia microphylla, is an active constituent of 5α-reductase inhibition with an IC50 value of 61.7 μM. 12-O-Methylcarnosic acid inhibits proliferation in LNCaP cells. 12-O-Methylcarnosic acid has antioxidant, anti-cancer and antimicrobial activity[1][2].
LY191704, as a benzoquinolinone, is a potent, nonsteroidal, noncompetitive and selective human type I 5α-reductase inhibitor. LY191704 is a racemic mixture of the compounds LY300502 and LY300503. LY191704 may be useful in the research of human endocrine disorders associated with overproduction of dihydrotestosterone (DHT) by 5α-reductase type 1[1][2].
Dutasteride-13C6 is the 13C labeled Dutasteride[1]. Dutasteride (GG745) is a potent inhibitor of both 5α-reductase isozymes. Dutasteride may possess off-target effects on the androgen receptor (AR) due to its structural similarity to DHT[2].
Lapisteride (CS 891) is an orally active 5α-reductase inhibitor. Lapisteride can be used in cancer research[1].
Finasteride (acetate) is an orally active testosterone 5-alpha-reductase inhibitor. Target: 5-alpha ReductaseApproved: 1992Finasteride (acetate) is the acetate salt of finasteride which is a synthetic 4-azasteroid antiandrogen compound, is a specific inhibitor of steroid Type II 5α-reductase, an intracellular enzyme that converts the androgen testosterone into 5α-dihydrotestosterone (DHT). Finasteride is used in the treatment of prostate cancer, benign prostatic hyperplasia, and androgenetic alopecia (male pattern baldness). In benign prostatic hyperplasia, finasteride inhibits 5alpha-reductase activity in epithelium for Ki of 10nM, significantly lower than in stroma (Ki = 33nM) [1].
MK 386 (L-733692) is a selective 5-α-reductase I inhibitor, used for prostate cancer inhibition[1].
Epristeride is a novel 5α-reductase inhibor.
MK-4541 is an orally active and selective androgen receptor (AR) modulator. MK-4541 acts as an antagonist to inhibit 5α-reductase. MK-4541 inhibits proliferation and induces apoptosis in AR positive prostate cancer cells. MK-4541 significantly inhibited the growth of R3327-G prostate tumors in xenograft mouse model[1].
Finasteride is an orally active testosterone 5-alpha-reductase inhibitor (Ki= 10 nM). Target: 5-alpha ReductaseApproved: 1992Finasteride, a synthetic 4-azasteroid antiandrogen compound, is a specific inhibitor of steroid Type II 5α-reductase, an intracellular enzyme that converts the androgen testosterone into 5α-dihydrotestosterone (DHT). Finasteride is used in the treatment of prostate cancer, benign prostatic hyperplasia, and androgenetic alopecia (male pattern baldness). In benign prostatic hyperplasia, finasteride inhibits 5alpha-reductase activity in epithelium for Ki of 10 nM, significantly lower than in stroma (Ki = 33nM) [1].
Alpha-Estradiol is a weak estrogen and a 5α-reductase inhibitor which is used as a topical medication in the treatment of androgenic alopecia.
Dutasteride (GG745) is a potent inhibitor of both 5 alpha-reductase isozymes. Dutasteride may possess off-target effects on the androgen receptor (AR) due to its structural similarity to DHT.IC50 Value:Target: 5 alpha-reductasein vitro: Dutasteride inhibited (3)H-T conversion to (3)H-DHT and, as anticipated, inhibited T-induced secretion of PSA and proliferation. However the drug also inhibited DHT-induced PSA secretion and cell proliferation (IC(50) approximately 1 microM). Dutasteride competed for binding the LNCaP cell AR with an IC(50) approximately 1.5 microM. High concentrations of dutasteride (10-50 microM), but not finasteride, in steroid-free medium, resulted in enhanced cell death, possibly by apoptosis [1]. Dutasteride reduces cell viability and cell proliferation in both cell lines tested (androgen-responsive (LNCaP) and androgen-unresponsive (DU145) human prostate cancer (PCa)) [2].in vivo: GG745 has a terminal half-life of approximately 240 hr, and single doses of >10 mg decreased DHT levels significantly more than did single 5-mg doses of finasteride [3]. In placebo treated men without prostate cancer there was an 8.3% median increase in PSA at month 24 compared with -59.5% in those who received dutasteride, using doubled values to correct for dutasteride treatment [4].Toxicity: Dutasteride may affect male fertility and steroid hormone dynamics. Therefore, a 21-day reproduction study was conducted to determine the effects of dutasteride (10, 32 and 100 μg/L) on fish reproduction. Exposure to dutasteride significantly reduced fecundity of fish and affected several aspects of reproductive endocrine functions in both males and females [5].Clinical trial: Bioequivalence Study Of Dutasteride Five 0.1 mg And One 0.5 mg Soft Gelatin Capsules In Healthy Male Volunteers. Phase 1