Chemistry:List of neurosteroids

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Allopregnanolone, a major endogenous inhibitory neurosteroid.
Steroid ring system.

This is a list of neurosteroids, or natural and synthetic steroids that are active on the mammalian nervous system through receptors other than steroid hormone receptors. It includes inhibitory, excitatory, and neurotrophic neurosteroids as well as pheromones and vomeropherines. In contrast to steroid hormones, neurosteroids have rapid, non-genomic effects through interactions with membrane steroid receptors and can quickly influence central nervous system function.


Inhibitory

Natural

Cholestanes

Androstanes

  • 3α,5α-Androstanediol (3α-androstanediol): 5α-androstane-3α,17β-diol – GABAA receptor positive allosteric modulator
  • 3α,5β-Androstanediol (etiocholanediol): 5β-androstane-3α,17β-diol – GABAA receptor positive allosteric modulator
  • 3α-Androstenol: 5α-androst-16-en-3α-ol – GABAA receptor positive allosteric modulator[2]
  • Androsterone: 5α-androstan-3α-ol-17-one – GABAA receptor positive allosteric modulator[3]
  • Etiocholanolone: 5β-androstan-3α-ol-17-one – GABAA receptor positive allosteric modulator[3]

The following are proneurosteroids:

  • Dihydrotestosterone (DHT; androstanolone, stanolone): 5α-androst-17β-ol-3-one – of the above-listed inhibitory androstane neurosteroids
  • Testosterone: androst-4-en-17β-ol-3-one – of the above-listed inhibitory androstane neurosteroids

Pregnanes

  • 3α-Dihydroprogesterone (3α-DHP): pregn-4-en-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • 5α-Dihydroprogesterone (5α-DHP; allopregnanedione): 5α-pregnane-3,20-dione – GABAA receptor positive allosteric modulator
  • 5β-Dihydroprogesterone (5β-DHP; pregnanedione): 5β-pregnane-3,20-dione – GABAA receptor positive allosteric modulator
  • Allopregnanediol: 5α-pregnane-3α,20α-diol – GABAA receptor positive allosteric modulator[4]
  • Allopregnanolone (brexanolone; SAGE-547): 5α-pregnan-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • Dihydrodeoxycorticosterone (DHDOC): 21-hydroxy-5α-pregnan-20-one – GABAA receptor positive allosteric modulator
  • Pregnanediol: 5β-pregnan-3α,20α-diol – GABAA receptor positive allosteric modulator[4]
  • Pregnanolone (eltanolone): 5β-pregnan-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • Tetrahydrodeoxycorticosterone (THDOC): 3α,21-dihydroxy-5α-pregnan-20-one – GABAA receptor positive allosteric modulator

The following are proneurosteroids:

Synthetic

Cholestanes

  • Acebrochol (cholesteryl acetate dibromide): 5α,6β-dibromocholestan-3β-ol 3β-acetate – GABAA receptor positive allosteric modulator

Pregnanes

  • Alfadolone: 3α,21-dihydroxy-5α-pregnane-11,20-dione – GABAA receptor positive allosteric modulator
  • Alfadolone acetate: 3α,21-dihydroxy-5α-pregnane-11,20-dione 21-acetate – GABAA receptor positive allosteric modulator
  • Alfaxalone: 3α-hydroxy-5α-pregnane-11,20-dione – GABAA receptor positive allosteric modulator
  • EIDD-036 (P4-20-O): 20-(hydroxyimino)pregn-4-en-3-one – progesterone-like inhibitory neurosteroid[5]
  • Ganaxolone: 3β-methyl-5α-pregnan-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • Hydroxydione: 21-hydroxy-5β-pregnane-3,20-dione – GABAA receptor positive allosteric modulator
  • Minaxolone: 11α-(dimethylamino)-2β-ethoxy-5α-pregnan-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • ORG-20599: 21-chloro-2β-morpholin-4-yl-5β-pregnan-3α-ol-20-one – GABAA receptor positive allosteric modulator
  • ORG-21465: 2β-(2,2-dimethyl-4-morpholinyl)-3α-hydroxy-11,20-dioxo-5α-pregnan-21-yl methanesulfonate – GABAA receptor positive allosteric modulator
  • Posovolone (Co 134444): 3β-Hydroxy-21-(1H-imidazol-1-yl)-3α-(methoxymethyl)-5α-pregnan-20-one – GABAA receptor positive allosteric modulator
  • Renanolone: 5β-pregnan-3α-ol-11,20-dione – GABAA receptor positive allosteric modulator
  • SGE-516 – GABAA receptor positive allosteric modulator[6]
  • SGE-872 – GABAA receptor positive allosteric modulator[6]
  • Zuranolone (SAGE-217): 3α-hydroxy-3β-methyl-21-(4-cyano-1H-pyrazol-1'-yl)-19-nor-5β-pregnan-20-one – GABAA receptor positive allosteric modulator[7][6]

The following are proneurosteroids:

Excitatory

Natural

Cholestanes

  • Cerebrosterol (24(S)-Hydroxycholesterol): cholest-5-en-3β,24S-diol – NMDA receptor positive allosteric modulator[12]

Pregnanes

  • 3β-Dihydroprogesterone (3β-DHP): pregn-4-en-3β-ol-20-one – GABAA receptor negative allosteric modulator
  • Epipregnanolone: 5β-pregnan-3β-ol-20-one – GABAA receptor negative allosteric modulator
  • Isopregnanolone (sepranolone): 5α-pregnan-3β-ol-20-one – GABAA receptor negative allosteric modulator
  • Pregnenolone sulfate (PS): pregn-5-en-3β-ol-20-one 3β-sulfate – GABAA receptor negative allosteric modulator, NMDA receptor positive allosteric modulator, sigma-1 receptor agonist, TRPM3 agonist, other actions

The following are proneurosteroids:

  • Pregnenolone (P5): pregn-5-en-3β-ol-20-one – of pregnenolone sulfate

Androstanes

  • Dehydroepiandrosterone (DHEA; prasterone): androst-5-en-3β-ol-17-one – GABAA receptor positive allosteric modulator, NMDA receptor positive allosteric modulator, sigma-1 receptor agonist, other actions
  • Dehydroepiandrosterone sulfate (DHEA-S; prasterone sulfate): androst-5-en-3β-ol-17-one 3β-sulfate – GABAA receptor negative allosteric modulator, NMDA receptor positive allosteric modulator, other actions

Synthetic

Androstanes

  • 17-Phenylandrostenol (17-PA): 17-phenyl-5α-androst-16-en-3α-ol – GABAA receptor negative allosteric modulator
  • Golexanolone (GR-3027): 3α-ethynyl-3β-hydroxyandrostan-17E-one oxime – GABAA receptor negative allosteric modulator

Others

  • SAGE-201 - oxysterol/cholesterol analogue – NMDA receptor positive allosteric modulator[6]
  • SAGE-301 - oxysterol/cholesterol analogue – NMDA receptor positive allosteric modulator[6]
  • SAGE-718: oxysterol/cholesterol analogue; exact chemical structure undisclosed – NMDA receptor positive allosteric modulator[6]

Mixed

Natural

Cholestanes

  • Cholesterol: cholest-5-en-3β-ol – NMDA receptor positive allosteric modulator, possible GABAA receptor positive allosteric modulator, many other actions[13][14][15]

Pregnanes

  • Epipregnanolone sulfate: 5β-pregnan-3β-ol-20-one 3β-sulfate – GABAA and NMDA receptor negative allosteric modulator, TRPM3 agonist

Neurotrophic

Natural

Androstanes

Ergostanes

  • Anicequol (NGA0187, NGD-187): 16β-acetoxy-3β,7β,11β-trihydroxy-5α-ergost-22(E)-en-6-one – non-endogenous; fungi-derived; undefined mechanism of action; shows neurotrophic activity in vitro; was formerly under development for the treatment of cognitive disorders[16]

Synthetic

Androstanes

  • BNN-20: 17β-spiro-(androst-5-en-17,2'-oxiran)-3β-ol – TrkA, TrkB, and p75NTR agonist

Pregnanes

  • BNN-27: 17α,20R-epoxypregn-5-ene-3β,21-diol – TrkA and p75NTR agonist

Antineurotrophic

Natural

Androstanes

  • Testosterone: androst-4-en-17β-ol-3-one – TrkA and p75NTR antagonist

Synthetic

Pregnanes

  • Dexamethasone: 9α-fluoro-11β,17α,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione – TrkA and p75NTR antagonist

Pheromones and pherines

Natural

Androstanes

Estranes

Synthetic

Androstanes

  • Fasedienol (Aloradine; PH94B; 4-androstadienol): androsta-4,16-dien-3β-ol

Estranes

  • Estratetraenyl acetate (ETA): estra-1,3,5(10),16-tetraen-3-yl acetate

Pregnanes

  • Pregnadienedione (PDD): pregna-4,20-dien-3,6-dione

Others

  • PH10, PH15, PH30, PH56, PH78, PH84, Salubrin (PH80) – pherines with undefined structures developed by a company called Pherin Pharmaceuticals

Others

Natural

Pregnanes

Spirostanes

  • Caprospinol (SP-233; diosgenin 3-caproate): (22R,25R)-20α-spirost-5-en-3β-yl hexanoate – β-amyloid ligand, sigma-1 receptor ligand, other actions; found naturally in Gynura japonica; under development as a neuroprotective against Alzheimer's disease[17][18]

Estranes

Synthetic

Pregnanes

Androstanes

  • Cetadiol: androst-5-ene-3β,16α-diol – undefined mechanism of action; developed as a "tranquilizer" and for the treatment of alcoholism in the 1950s

See also

References

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  2. "The pheromone androstenol (5 alpha-androst-16-en-3 alpha-ol) is a neurosteroid positive modulator of GABAA receptors". J. Pharmacol. Exp. Ther. 317 (2): 694–703. 2006. doi:10.1124/jpet.105.098319. PMID 16415088. 
  3. 3.0 3.1 "Anticonvulsant activity of androsterone and etiocholanolone". Epilepsia 46 (6): 819–27. 2005. doi:10.1111/j.1528-1167.2005.00705.x. PMID 15946323. 
  4. 4.0 4.1 "Modulation of human recombinant GABAA receptors by pregnanediols". Neuropharmacology 35 (9–10): 1223–31. 1996. doi:10.1016/s0028-3908(96)00066-4. PMID 9014137. 
  5. 5.0 5.1 "Evaluating the neurotherapeutic potential of a water-soluble progesterone analog after traumatic brain injury in rats". Neuropharmacology 109: 148–158. October 2016. doi:10.1016/j.neuropharm.2016.05.017. PMID 27267687. 
  6. 6.0 6.1 6.2 6.3 6.4 6.5 "Breakthroughs in neuroactive steroid drug discovery". Bioorg. Med. Chem. Lett. 28 (2): 61–70. 2018. doi:10.1016/j.bmcl.2017.11.043. PMID 29223589. 
  7. "Neuroactive Steroids. 2. 3α-Hydroxy-3β-methyl-21-(4-cyano-1H-pyrazol-1'-yl)-19-nor-5β-pregnan-20-one (SAGE-217): A Clinical Next Generation Neuroactive Steroid Positive Allosteric Modulator of the (γ-Aminobutyric Acid)A Receptor". J. Med. Chem. 60 (18): 7810–7819. 2017. doi:10.1021/acs.jmedchem.7b00846. PMID 28753313. 
  8. "Development and screening of water-soluble analogues of progesterone and allopregnanolone in models of brain injury". J. Med. Chem. 52 (19): 6012–23. 2009. doi:10.1021/jm900712n. PMID 19791804. 
  9. "Water-soluble progesterone analogues are effective, injectable treatments in animal models of traumatic brain injury". ACS Med Chem Lett 3 (5): 362–6. 2012. doi:10.1021/ml200303r. PMID 24900479. 
  10. Basu, Krishnakali; Mitra, Ashim K. (1990). "Effects of 3-hydrazone modification on the metabolism and protein binding of progesterone". International Journal of Pharmaceutics 65 (1–2): 109–114. doi:10.1016/0378-5173(90)90015-V. ISSN 0378-5173. 
  11. Basu, Krishnakali; Kildsig, Dane O.; Mitra, Ashim K. (1988). "Synthesis and kinetic stability studies of progesterone derivatives". International Journal of Pharmaceutics 47 (1–3): 195–203. doi:10.1016/0378-5173(88)90231-1. ISSN 0378-5173. 
  12. "The major brain cholesterol metabolite 24(S)-hydroxycholesterol is a potent allosteric modulator of N-methyl-D-aspartate receptors". J. Neurosci. 33 (44): 17290–300. 2013. doi:10.1523/JNEUROSCI.2619-13.2013. PMID 24174662. 
  13. "A predicted binding site for cholesterol on the GABAA receptor". Biophys. J. 106 (9): 1938–49. 2014. doi:10.1016/j.bpj.2014.03.024. PMID 24806926. Bibcode2014BpJ...106.1938H. 
  14. "Cholesterol binding to ion channels". Front Physiol 5: 65. 2014. doi:10.3389/fphys.2014.00065. PMID 24616704. 
  15. "Active membrane cholesterol as a physiological effector". Chem. Phys. Lipids 199: 74–93. 2016. doi:10.1016/j.chemphyslip.2016.02.003. PMID 26874289. 
  16. "A novel neuritogenic compound, NGA0187". J. Antibiot. 55 (7): 629–34. 2002. doi:10.7164/antibiotics.55.629. PMID 12243452. 
  17. "Caprospinol: discovery of a steroid drug candidate to treat Alzheimer's disease based on 22R-hydroxycholesterol structure and properties". J. Neuroendocrinol. 24 (1): 93–101. 2012. doi:10.1111/j.1365-2826.2011.02167.x. PMID 21623958. 
  18. "Research programme: Neurodegenerative disorders therapeutics - Samaritan/McGill University - AdisInsight". http://adisinsight.springer.com/drugs/800017449.