| Identification | More | [Name]
ALLOPREGNANOLONE | [CAS]
516-55-2 | [Synonyms]
u0949
NSC 97078
ISOPREGNANOLONE
ALLOPREGNANOLONE
Alloepipregnanolone
Isoallopregnanolone
5α-Dihydropregnenolone
Tetrahydroprogesterone
5A-PREGNAN-3B-OL-20-ONE
3-beta-allopregnanolone
3-Hydroxypregnan-20-one
ALLOPREGNAN-3B-OL-20-ONE
Allopregnan-3β-ol-20-one
allo-Pregnan-3β-ol-20-one
Relenopride Hydrochloride
5a-Pregnan-3-ol-20-one-d4
5ALPHA-DIHYDROPREGNENOLONE
5A-PREGNAN-3BETA-OL-20-ONE
5-ALPHA-DIHYDROPREGNANOLONE
Allopregnan-3beta-ol-20-one
Allopregnane-3beta-ol-20-one
3β-hydroxy-5α-pregnan-20-one
Wln: L E5 B666tj A1 E1 fv1 oq
17β-Acetyl-5α-androstane-3β-ol
5ALPHA-PREGNAN-3BETA-OL-20-ONE
5alpha-Pregnane-3beta-ol-20-one
3-beta-hydroxy-5-alpha-pregnan-20-on
5alpha-Pregnan-20-one, 3beta-hydroxy-
3-BETA-HYDROXY-5-ALPHA-PREGNAN-20-ONE
3beta-Hydroxy-5alpha-dihydroprogesterone
3-hydroxy-,(3-beta,5-alpha)-pregnan-20-on
Pregnan-20-one, 3-hydroxy-, (3beta,5alpha)-
3-BETA-HYDROXY-5-ALPHA-TETRAHYDROPROGESTERONE
2 - [2 - (2-fluorophenyl) - 2-oxoethyl] propionitrile
(5α,8β,9α,14α)-10β,13β-Dimethyl-17β-acetylhexadecahydro-1H-cyclopenta[a]phenanthrene-3β-ol
3β-Hydroxy-5α-pregnan-20-one, 3β-Hydroxy-5α-tetrahydroprogesterone, 5α-Dihydropregnenolone, Allopregnanolone, Isopregnanolone
1-[(8R,9S,10S,13S,14S,17S)-3-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethanone | [EINECS(EC#)]
208-224-2 | [Molecular Formula]
C21H34O2 | [MDL Number]
MFCD00064935 | [Molecular Weight]
318.49 | [MOL File]
516-55-2.mol |
| Questions And Answer | Back Directory | [Description]
Allopregnanolone is a neuroactive metabolite of progesterone. It is a potent positive allosteric modulator of the action of GABA on the GABAA receptor. | [Properties]
Mr of allopregnanolone is 318.49 and its melting point is 168°C. | [Discovery]
The presence of a progestational compound in the rabbit adrenal gland was reported in 1933, and was isolated in 1938 from the ox adrenal gland.Allopregnanolone formation was demonstrated in the brains of various vertebrates2–5 and the pineal glands of birds. | [Biological functions]
Allopregnanolone mediates its effects through modulation of the GABAA receptor.Allopregnanolone is reported to modulate the GABA-ergic function by increasing the GABAA receptor opening frequency and duration of the receptor at concentrations in the nanomolar range. A balance between unbinding, desensitization, and reopening of the desensitized GABAA receptor underlies the delay of the inhibitory postsynaptic currents. Allopregnanolone slows the rate of recovery of the GABAA receptor from desensitization and possibly increases the rate of entry into fast desensitized states. Allopregnanolone exerts neurogenetic, neuroprotective, antidepressant, and anxiolytic effects. Reduced levels of allopregnanolone are found to be associated with major depression, anxiety disorders, premenstrual dysphoric disorder, and Alzheimer’s disease. Allopregnanolone is actively produced in the pineal gland compared with the brain and pineal allopregnanolone acts on Purkinje cells to prevent apoptosis in the juvenile quail. | [Uses]
Isopregnanolone is used in the preparation of antimicrobial and anti-leukemic steroids. Intermediate. | [Clinical implications]
Decreased production of allopregnanolone leads to NP-C; thus allopregnanolone treatment may be useful in ameliorating progression of the disease.In patients with Alzheimer’s disease, the level of allopregnanolone in the temporal cortex was significantly lower than controls, in contrast to pregnenolone and dehydroepiandrosterone where the concentrations were increased.This may be explained by altered regulation of the neurosteroid biosynthetic pathway, which blocks allopregnanolone formation. | [Regulation of synthesis and release]
Allopregnanolone synthesis is stimulated by swim stress.In swim stress models, increased allopregnanolone is associated with decreased dopamine and norepinephrine in the prefrontal cortex, suggesting that allopregnanolone influences the mesolimbocortical dopamine pathway.In vivo treatment of the rat with the dopamine D4 antagonist clozapine induces a rapid increase in the concentration of allopregnanolone in the cerebral cortex and striatum. |
| Chemical Properties | Back Directory | [Melting point ]
200℃ | [alpha ]
D27 +91.2° (c = 0.4 in ethanol) | [Boiling point ]
431.2±18.0 °C(Predicted) | [density ]
1.1 g/cm3 | [storage temp. ]
Refrigerator | [solubility ]
Chloroform (Slightly), Methanol (Slightly) | [form ]
Solid | [pka]
15.12±0.70(Predicted) | [color ]
White to Off-White | [CAS DataBase Reference]
516-55-2(CAS DataBase Reference) |
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