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- W2121637838 abstract "4-Phenyl-1-(4-phenylbutyl)piperidine (4-PPBP) is a very potent ligand for sigma (Sigma) receptors. The present study was undertaken to evaluate [3H]4-PPBP as a radioligand for in vivo labeling of cerebral sigma receptors. After intravenous administration of [3H]4-PPBP to mice, there is high uptake of radioactivity in the brain. The regional distribution of radioactivity in the brain 2 h after intravenous injection of [3H]4-PPBP parallels the in vitro binding of the radioligand in rat brain (pons/medulla > cerebellum > or = prefrontal cortex > or = parietal cortex > hypothalamus > olfactory tubercle > or = thalamus > hippocampus > striatum). Pretreatment with haloperidol (2 mg/kg) significantly decreases the radioactivity measured in the brain 30-120 min after injection of [3H]4-PPBP. Pretreatment with unlabeled 4-PPBP or ifenprodil also significantly decreases radioactivity in the brain 2 h after injection of [3H]4-PPBP, in a dose-dependent manner. The in vivo binding of [3H]4-PPBP in the brain also is significantly inhibited by SL 82.0715, BMY 14802, 1,3-di-o-tolylguanidine (DTG), and (+)-enantiomers of pentazocine, SKF 10,047, and 3-PPP, but not by the corresponding (-)-enantiomers, consistent with stereoselectivity of inhibition obtained in in vitro binding studies. In contrast, pretreatment with dizocilpine and spiperone does not inhibit in vivo binding of [3H]4-PPBP. The results indicate that [3H]4-PPBP would be a suitable radioligand for in vivo labeling of sigma receptors in brain." @default.
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- W2121637838 date "1995-05-01" @default.
- W2121637838 modified "2023-09-26" @default.
- W2121637838 title "In vivo labeling of sigma receptors in mouse brain with [3H]4-phenyl-1-(4-phenylbutyl)piperidine" @default.
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- W2121637838 doi "https://doi.org/10.1002/syn.890200112" @default.
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