NDLI: A possible physiological role for cerebral tetrahydroisoquinolines

Content Provider	Springer Nature Link
Author	Vetulani, Jerzy Antkiewicz Michaluk, Lucyna Nalepa, Irena Sansone, Mario
Copyright Year	2003
Abstract	Tetrahydroisoquinolines present in the mammalian brain, 1,2,3,4-tetrahydroisoquinoline (TIQ) and salsolinol, suspected to cause neurodegeneration leading to Parkinson's disease, were investigated to find their possible physiological role. To this aim their behavioral and receptor effects induced after a single dose were tested in mice and rats. Both compounds do not affect significantly the basal locomotor activity, very effectively block hyperactivity induced by apomorphine (rats) and amphetamine (mice), only partially block hyperactivity induced by scopolamine, do not affect locomotor stimulation induced by cocaine, and strongly augment the running fit induced by morphine (mice). They do not produce extrapyramidal symptoms and do not potentiate haloperidol-induced catalepsy (rats). TIQ and salsolinol do not displace antagonists of several receptors (including D$_{1}$ and D$_{2}$) from their binding sites, but displace the agonists of α$_{2}$-adrenoreceptors, [$^{3}$H] clonidine and of dopamine receptors, [$^{3}$H] apomorphine. The results indicate that salsolinol and TIQ act as specific antagonists of agonistic conformation of dopamine receptors, and owing to that may play a role of endogenous feed-back regulators of the dopaminergic system. Those properties make tetrahydroisoquinolines potential antidopaminergic drugs devoid of extrapyramidal effects, with possible application in substance addiction disorder as anti-craving agents.
Starting Page	147
Ending Page	155
Page Count	9
File Format	PDF
ISSN	10298428
Journal	Neurotoxicity Research
Volume Number	5
Issue Number	1-2
e-ISSN	14763524
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Amphetamine Apomorphine Cocaine Dopamine receptor Hyperactivity Morphine Salsolinol Tetrahydroisoquinolines Neurosciences Pharmaceutical Sciences/Technology Neurology Neurochemistry Pharmacology/Toxicology Neurobiology
Content Type	Text
Resource Type	Article
Subject	Neuroscience Toxicology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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