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P8887

Sigma-Aldrich

5α-Pregnan-3α-ol-20-one

solid

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Synonym(s):
3α-Hydroxy-5α-pregnan-20-one, 3α-OH-DHP, Allopregnan-3α-ol-20-one, Allopregnanolone, Brexanolone
Empirical Formula (Hill Notation):
C21H34O2
CAS Number:
516-54-1
Molecular Weight:
318.49
Beilstein:
3211363
MDL number:
MFCD00003677
UNSPSC Code:
12352200
PubChem Substance ID:
24278659
NACRES:
NA.77

form

solid

Quality Level

200

color

white

solubility

DMSO: 5 mg/mL
methanol: soluble

SMILES string

[H][C@@]12CC[C@@]3([H])[C@]4([H])CC[C@H](C(C)=O)[C@@]4(C)CC[C@]3([H])[C@@]1(C)CC[C@@H](O)C2

InChI

1S/C21H34O2/c1-13(22)17-6-7-18-16-5-4-14-12-15(23)8-10-20(14,2)19(16)9-11-21(17,18)3/h14-19,23H,4-12H2,1-3H3/t14-,15+,16-,17+,18-,19-,20-,21+/m0/s1

InChI key

AURFZBICLPNKBZ-SYBPFIFISA-N

Gene Information

human ... GABRA1(2554) , GABRA2(2555) , GABRA3(2556) , GABRA4(2557) , GABRA5(2558) , GABRA6(2559) , GABRB1(2560) , GABRB2(2561) , GABRB3(2562) , GABRD(2563) , GABRE(2564) , GABRG1(2565) , GABRG2(2566) , GABRG3(2567) , GABRP(2568) , GABRQ(55879)
mouse ... Gabrg2(14406)
rat ... Gabra1(29705) , Gabra2(29706) , Gabrg2(29709)

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Application

5α-Pregnan-3α-ol-20-one has been used:
  • as an allosteric modulator of GABAA receptors in mice
  • a neuroprotective steroid in transgenic mice
  • a neurosteroid

Biochem/physiol Actions

5α-Pregnan-3α-ol-20-one is a positive allosteric modulator of γ-aminobutyric acid (GABA) A receptor (GABAA). It is also called pregnan and during pregnancy it modulates the atrial volume receptors transducer properties. During estrus cycle, 5α-Pregnan-3α-ol-20-one or allopregnanolone levels changes in hypothalamus. It is present in high levels post adrenalectomy and gonadectomy.

Features and Benefits

This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.
This compound is featured on the GABAA Receptors page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Certificates of Analysis (COA)

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Jeffrey J Lochhead et al.
Frontiers in physiology, 11, 914-914 (2020-08-28)
The blood-brain barrier (BBB) allows the brain to selectively import nutrients and energy critical to neuronal function while simultaneously excluding neurotoxic substances from the peripheral circulation. In contrast to the highly permeable vasculature present in most organs that reside outside
Ibuki Ueoka et al.
International journal of molecular sciences, 20(17) (2019-08-24)
Whole exome analyses have identified a number of genes associated with autism spectrum disorder (ASD) and ASD-related syndromes. These genes encode key regulators of synaptogenesis, synaptic plasticity, cytoskeleton dynamics, protein synthesis and degradation, chromatin remodeling, transcription, and lipid homeostasis. Furthermore
The neurosteroid 5beta-pregnan-3 alpha-ol-20-one enhances actions of etomidate as a positive allosteric modulator of alpha beta gamma L GABAA receptors
Li P, et al.
British Journal of Pharmacology, 171(23), 5446-5457 (2014)
Genetic variations and treatments that affect the lifespan of the NPC1 mouse
Liu B, et al.
Journal of Lipid Research, 49(3), 663-669 (2008)
Benny Liu et al.
Journal of lipid research, 49(3), 663-669 (2007-12-14)
Niemann-Pick type C (NPC) disease is a multisystem disorder caused primarily by a mutation in the npc1 gene. These studies evaluated the effect of genetic background, deletion of additional genes, and administration of several agents on the age at death
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