title: Reduction of 1-methyl 1,2,3,4-tetrahydroisoquinoline level in substantia nigra of the aged rat.
abstract: The compounds 1,2,3,4-tetrahydroisoquinoline (TIQ) and 1-methyl-1,2,3,4-tetrahydroisoquinoline (1-MeTIQ) are endogenous in humans and rats. Whereas TIQ seems to have neurotoxicity, 1-MeTIQ has been described as having a protective effect. In this paper, we report the concentration of TIQ and 1-MeTIQ in two areas especially influenced by aging and Parkinson's disease, the substantia nigra (SN) and striatum (ST), of the rat at different ages. 1-MeTIQ and TIQ were detected in both structures using gas chromatography-mass spectrometry with the higher content of both being in the SN. During the aging process there is a significant decrease (50%) in 1-MeTIQ levels in the SN, but TIQ levels did not change significantly in either of the studied regions.
authors.affiliation: Departamento de Bioquimica, Bromatologia y Toxicologia, Facultad de Farmacia, Universidad de Sevilla, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Ayala
authors.forename: J
authors.initials: J
authors.lastname: Parrado
authors.forename: J
authors.initials: J
authors.lastname: Cano
authors.forename: A
authors.initials: A
authors.lastname: Machado
mesh_terms: D000375:Aging / Q000378:metabolism*; D000704:Analysis of Variance; D000818:Animals; D008401:Gas Chromatography-Mass Spectrometry; D007546:Isoquinolines / Q000032:analysis / Q000378:metabolism*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D013378:Substantia Nigra / Q000254:growth & development / Q000378:metabolism*; D044005:Tetrahydroisoquinolines
chemical_list: D007546:Isoquinolines; D044005:Tetrahydroisoquinolines; C050386:1-methyl-1,2,3,4-tetrahydroisoquinoline; C014843:1,2,3,4-tetrahydroisoquinoline