Formestane

Formestane Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:

R60:Kann die Fortpflanzungsfähigkeit beeinträchtigen.

S-Sätze Betriebsanweisung:

S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).

Beschreibung

Formestane is a potent aromatase inhibitor launched in the UK as a second-line endocrine treatment for breast cancer. As a synthetic derivative of androstanedione, the natural substrate for the biosynthesis of estrogen by the enzyme aromatase, formastane selectively inhibits aromatase and binds to its steroid receptor site to cause a rapid and sustained fall in circulating estrogen level and, therefore, inhibits tumor growth. In patients with existing bulky primary tumors, formestane effectively reduces the size of the tumors. Formastane has apparent tolerability advantages and less side effects than other agents such as aminoglutethimide.

Chemische Eigenschaften

Needles

Definition

ChEBI: A 17-oxo steroid that is androst-4-ene-3,17-dione in which the hydrogen at position 4 is replaced by a hydroxy group. Formestane was the first selective, type I steroidal aromatase inhibitor, suppressing oestrogen production from anabolic steroids or proho mones. It was formerly used in the treatment of oestrogen-receptor positive breast cancer in post-meopausal women. As it has poor oral bioavailability, it had to be administered by (fortnightly) intramuscular injection. It fell out of use with the subseque t development of cheaper, orally active aromatase inhibitors. Formestane is listed by the World Anti-Doping Agency as a substance prohibited from use by athletes.

Mechanism of action

Aromatase inhibitors such as formestane and letrozole reduce plasma estradiol levels by inhibiting the conversion of testosterone to estrogen. This compound was first described as a competitive inhibitor, but subsequent evidence proved that its binding to aromatase was irreversible. Hence, it is a suicide inhibitor. In the dog, but not rodents, this results in Leydig cell hypertrophy and hyperplasia. This is thought to be due to the differential sensitivity of the pituitary feedback mechanism to estrogens and androgens in the different species[1-2].

Formestane Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

Formestane Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Firmenname	Telefon	E-Mail	Land	Produktkatalog	Edge Rate
Rixing Chemical CO.,LTD.	+86-852-57055271 +8613237129059	sales@rixingbiz.com	China	232	58
Hebei Weibang Biotechnology Co., Ltd	+8615531157085	abby@weibangbio.com	China	8810	58
Hebei Mojin Biotechnology Co., Ltd	+86 13288715578 +8613288715578	sales@hbmojin.com	China	12837	58
Hong Kong Excellence Biotechnology Co., Ltd.		ada@sh-teruiop.com	China	875	58
Nantong Guangyuan Chemicl Co,Ltd	+undefined17712220823	admin@guyunchem.com	China	615	58
Hangzhou FandaChem Co.,Ltd.	+8615858145714	FandaChem@Gmail.com	China	9116	55
Rixing Chemical CO.,LTD	+86-13237129059 -13237129059	sales@rixingchemi.com	CHINA	229	55
Shanxi Naipu Import and Export Co.,Ltd	+86-13734021967 +8613734021967	kaia@neputrading.com	China	1001	58
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29880	58
.GZ HONESTCHEM CO.,LTD	+86-15013270415 +86-15013270415	honestchemical@foxmail.com	China	244	58

566-48-3()Verwandte Suche:

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• 4-hydroxy-androst-4-ene-17-dione
• 4-hydroxy-delta(sub4)-androstenedione
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• 4-Hydroxyandrost-4-ene-3,17-dione, CGP-32349
• 4-Hydroxyandrostan-4-ene-3,17-dione
• (8R,9S,10R,13S,14S)-4-hydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione
• (8R,9S,10R,13S,14S)-4-hydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-quinone
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• Enzyme Inhibitors
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• 多肽抗原
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• Aromatase
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