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Titolo:
Evidence that L-deprenyl treatment for one week does not inhibit MAO A or the dopamine transporter in the human brain
Autore:
Fowler, JS; Volkow, ND; Logan, J; Franceschi, D; Wang, GJ; MacGregor, R; Shea, C; Garza, V; Pappas, N; Carter, P; Netusil, N; Bridge, P; Liederman, D; Elkashef, A; Rotrosen, J; Hitzemann, R;
Indirizzi:
Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA 11973 ab, Dept Chem, Upton, NY 11973 USA
Titolo Testata:
LIFE SCIENCES
fascicolo: 24, volume: 68, anno: 2001,
pagine: 2759 - 2768
SICI:
0024-3205(20010504)68:24<2759:ETLTFO>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONOAMINE-OXIDASE-A; IN-VIVO; STRIATAL DOPAMINE; RAT STRIATUM; B INHIBITOR; BLOOD-FLOW; LONG-TERM; SELEGILINE; BINDING; PET;
Keywords:
L-deprenyl; monoamine oxidase A; dopamine transporter;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Fowler, JS Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA 11973 em, Upton, NY 11973 USA
Citazione:
J.S. Fowler et al., "Evidence that L-deprenyl treatment for one week does not inhibit MAO A or the dopamine transporter in the human brain", LIFE SCI, 68(24), 2001, pp. 2759-2768

Abstract

In this study, we investigated whether treatment with L-deprenyl, a selective monoamine oxidase B (MAO B) inhibitor, also inhibits MAO A or the dopamine transporter in the human brain. Six normal volunteers (age 46 +/- 6 yrs) had two PET sessions, one at baseline and one following L-deprenyl (10 mg/day) for 1 week. Each session included one scan with [C-11]clorgyline (to assess MAO A) and one scan 2 hours later with [C-11]cocaine (to assess dopamine transporter availability). A 3-compartment model was used to compare the plasma-to-brain transfer constant, K, (a:function of blood flow) and Xk,(a kinetic term proportional to brain MAO A) before and after treatment. Dopamine transporter availability was measured as the ratio of distribution volumes of the striatum to cerebellum (DVR) which is equal to Bmax/K-D + 1. L-Deprenyl treatment for 1 week did not affect either brain MAO A activityor dopamine transporter availability. There was a non-significant trend for an increase in K, after L-deprenyl. These results confirm that L-deprenylafter one week of treatment at doses typically used clinically is selective for MAO B and that it does not produce a measurable affect on the dopamine transporter, suggesting that MAO A inhibition and dopamine transporter blockade do not contribute tb its pharmacological effects. (C) 2001 Elsevier Science Inc. All rights reserved.

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Documento generato il 23/01/20 alle ore 03:22:32