Ibogaine – Pinoline

Pinoline is a methoxylated tryptoline (5-methoxytryptoline) long claimed to be produced in the pineal gland during the metabolism of melatonin, however its pineal occurrence remains controversial. Its IUPAC name is 6-methoxy-1,2,3,4-tetrahydro-β-carboline, usually abbreviated as 6-MeO-THBC, and its more common name is a combination of “pineal beta-carboline”. The biological activity of this molecule is of interest as a potential free radical scavenger, also known as an antioxidant, and as a monoamine oxidase A inhibitor. Bausch & Lomb filed a patent for a drug delivery device utilizing this molecule, designed to treat various ophthalmic disorders in 2006.

Pharmacology

One of pinoline’s most outstanding pharmacological properties is its ability to promote neurogenesis in vitro; even at trace concentrations. Aluminium toxicity causes an increase in lipid peroxidation, with most damage occurring in the brain. A recent review of studies shows pinoline and melatonin to be effective at reducing the lipid peroxidation. Studies included both human and animal subjects. The studies’ results support that pinoline has antioxidant properties. Lipopolysaccharide is produced by Gram-negative bacteria and stimulates the production of free radicals which in turn cause lipid peroxidation. A recent study compared the effectiveness of melatonin and other similar compounds on the lipopolysaccharide induced lipid peroxidation. The results showed support for pinoline’s ability to reduce damage from lipid peroxidation. Pinoline was also shown to be more effective than vitamin E at reducing lipopolysaccharide activity in the retina. Another recent study compared the antioxidant properties of compounds from the tryptophan metabolic pathway in the pineal gland against oxidative damage to the lipids and proteins of synaptosomes. Synaptosomes isolated from rat brains were used in an experiment assessing damage by measuring malondialdehyde, 4-hydroxyalkenal, and carbonyl content in the proteins. Pinoline was shown to be the most powerful antioxidant. These results support the evidence for pinoline’s antioxidant abilities and the potential to protect against oxidative damage.

See also

References

  1. ^ Barker, Steven A. (2013). “LC/MS/MS analysis of the endogenous dimethyltryptamine hallucinogens, their precursors, and major metabolites in rat pineal gland microdialysate” (PDF)Biomedical Chromatography27 (12): 1690–1700. doi:10.1002/bmc.2981PMID 23881860.
  2. ^ Callaway, James C.; Gyntber, Jukka; Poso, Antti; Airaksinen, Mauno M.; Vepsäläinen, Jouko (1994). “The pictet-spengler reaction and biogenic tryptamines: Formation of tetrahydro-β-carbolines at physiologicalpH”. Journal of Heterocyclic Chemistry31 (2): 431. doi:10.1002/jhet.5570310231.
  3. ^ Schiller, Erich; Bartsch, H. (2003). Free Radicals and Inhalation Pathology: Respiratory System, Mononuclear Phagocyte System, Hypoxia and Reoxygenation, Pneumoconioses, and Other Granulomatoses, Cancer (Google Books, page view). Springer. p. 107. ISBN 978-3-540-00201-7. Retrieved 2009-02-14.
  4. ^ Airaksinen, M. M., Huang, J. T., Ho, B. T., Taylor, D., and Walker, K. (1978). “The Uptake of 6-Methoxy-1,2,3,4-Tetrahydro-β-carboline and its Effect on 5-Hydroxytryptamine Uptake and Release in Blood Platelets”. Acta Pharmacol Toxicol43 (5): 375–380. doi:10.1111/j.1600-0773.1978.tb02281.x.
  5. ^ Bartels, S. P. (2006) U.S. Patent No. 20,060,292,202 Washington, DC: U.S.
  6. ^ { Mario de la Fuente et al. 2015 “Neurogenic Potential Assessment and Pharmacological Characterization of 6-Methoxy-1,2,3,4-tetrahydro-β-carboline (Pinoline) and Melatonin–Pinoline Hybrids” http://pubs.acs.org/doi/abs/10.1021/acschemneuro.5b00041}
  7. ^ Mohammadir, Azadeh; Abdollahi, Mohammad (2011). “A Systematic Review on Oxidant/Antioxidant Imbalance in Aluminium Toxicity”. International Journal of Pharmacology7: 12–21. doi:10.3923/ijp.2011.12.21.
  8. ^ Sewerynek, E; Wiktorska, JA; Stuss, M (2011). “6-methoxytryptophol reduces lipopolysaccharide-induced lipid peroxidation in vitro more effectively than melatonin”. Journal of Physiology and Pharmacology62 (6): 677–83. PMID 22314571.
  9. ^ Millán-Plano, Sergio; Piedrafita, Eduardo; Miana-Mena, Francisco J.; Fuentes-Broto, Lorena; Martínez-Ballarín, Enrique; López-Pingarrón, Laura; Sáenz, María A.; García, Joaquín J. (2010). “Melatonin and Structurally-Related Compounds Protect Synaptosomal Membranes from Free Radical Damage”International Journal of Molecular Sciences11 (1): 312–28. doi:10.3390/ijms11010312PMC 2821006PMID 20162018.
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