Naam:Leuprolide-asetaat,Leuprorelin-asetaat, Leuproreline Acetaat, Leuprorelinum Acetaat
Cas No:74381-53-6
Formule: C61H88N16O14
Molekulêr:1269.45
Volgorde: Pyr-His-Trp-Ser-Tyr-D-Leu-Leu-Arg-Pro-NHEt asetaat sout
Reinheid:98%
Voorkoms: wit poeier
Leuprolide acetate is a synthetic nonapeptide that is a potent gonadotropin-releasing hormone receptor (GnRHR) agonist used for diverse clinical applications, including the treatment of prostate cancer, endometriose, uterine fibroids, central precocious puberty and in vitro fertilization techniques. As its basic mechanism of action, leuprolide acetate suppresses gonadotrope secretion of luteinizing hormone and follicle-stimulating hormone that subsequently suppresses gonadal sex steroid production. Daarby, leuprolide acetate is presently being tested for the treatment of Alzheimer's disease, polycystic ovary syndrome, functional bowel disease, short stature, premenstrual syndrome and even as an alternative for contraception. Mounting evidence suggests that GnRH agonist suppression of serum gonadotropins may also be important in many of the clinical applications described above. Bowendien, the presence of GnRHR in a multitude of non-reproductive tissues including the recent discovery of GnRHR expression in the hippocampi and cortex of the human brain indicates that GnRH analogs such as leuprolide acetate may also act directly via tissue GnRHRs to modulate (brein) function. Thus, the molecular mechanisms underlying the therapeutic effect of GnRH analogs in the treatment of these diseases may be more complex than originally thought. These observations also suggest that the potential uses of GnRH analogs in the modulation of GnRH signaling and treatment of disease has yet to be fully realized.
1.Leuprorelin may be used in the treatment of hormone-responsive cancers such as prostate cancer and breast cancer. It may also be used for estrogen-dependent conditions such as endometriosis or uterine fibroids.
2.It may be used for precocious puberty in both males and females, and to prevent premature ovulation in cycles of controlled ovarian stimulation for in vitro fertilization (IVF).
3.Leuprore.lin, along with triptore, are often used to delay puberty in transgender youth until they are old enough to begin hormone replacement therapy. They are also sometimes used as superior alternatives to anti-androgens like spironolac.tone and cyproterone acetate for suppressing test osterone production in trans women.
| ITEMS |
SPESIFIKASIE |
RESULT |
| Voorkoms |
Wit poeier |
Conforms |
| Oplosbaarheid |
Soluble in water or 1% acetic acid at a
concentration of ≥1mg/ml to give a clear,
colorless solution |
Conforms |
| Identity |
A. EN
Same with the reference spectrum of Leuprolide
B. HPLC
Same with the reference solution
C. Amino Acid Analysis
Ser: Present
Glu: 0.85~1.1
Pro: 0.85~1.1
Leu: 1.80~2.2
Tyr: 0.85~1.1
His: 0.85~1.1
Arg: 0.85~1.1
Trp: Present |
Conforms
Conforms
0.84
0.97
1.04
2.02
1.01
0.99
1.00
present |
| Specific Optical Rotation |
-38.0~-42.0° [a]20D(c=1,1% HAc) |
-39.2° |
| RelatedSubstance
(By HPLC) |
Total Impurities(%)≤2.5%
acetyl-leuprolide≤1.0%
D-His-leuprolide≤0.5%
L-Leu6-leuprolide≤0.5%
D-Ser-leuprolide≤0.5%
Any other Impurity≤0.5% |
0.21%
Conforms
Conforms
Conforms
Conforms
0.2% |
| Asetaat inhoud(By HPLC) |
4.7~9.0% |
8.7% |
| Waterinhoud(Karl Fischer) |
≤5.0% |
1.4% |
| Sulphate ash |
≤0.3% |
Conforms |
| Bakteriese endotoksiene |
≤16.7 IU/mg |
Conforms |
| Residual Organic Solvents |
Acetonitrile ≤0.041%(By GC)
DMF ≤0.088%(By GC)
MEOH ≤0.3%(By GC)
TFA ≤0.1%(By HPLC) |
Conforms
Conforms
Conforms
Conforms |
| Toets(Deur Anhydrous, Asynsuurvry ) |
97.0~103.0% |
98.10% |
