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Quantitative radioluminography of serotonin uptake sites in the porcine brain
Author(s) -
Cumming Paul,
Kretzschmar Marion,
Brust Peter,
Smith Donald F.
Publication year - 2001
Publication title -
synapse
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.809
H-Index - 106
eISSN - 1098-2396
pISSN - 0887-4476
DOI - 10.1002/1098-2396(20010315)39:4<351::aid-syn1019>3.0.co;2-m
Subject(s) - neocortex , serotonin , entorhinal cortex , basal ganglia , thalamus , human brain , chemistry , cortex (anatomy) , substantia nigra , cerebral cortex , anatomy , biology , neuroscience , hippocampus , central nervous system , dopamine , biochemistry , receptor , dopaminergic
The regional density of serotonin uptake sites in porcine brain was determined by quantitative radioluminography. Brain cryostat sections 30 μm thick were cut in the sagittal plane and were incubated with [ 3 H]citalopram for selective labeling of serotonin uptake sites. The autoradiograms were quantified using tritium‐sensitive radioluminography. The apparent affinity (K D ) of [ 3 H]citalopram for its binding sites in various brain regions ranged from 2.3–5.6 nM. The density of serotonin uptake sites was highest (200–300 fmol/mg tissue) in the amygdala, superior colliculus, and substantia nigra. Intermediate binding (100 fmol/mg tissue) was present in the dorsomedial thalamus, basal ganglia, and entorhinal cortex. Traces of specific binding (10 fmol/mg tissue) were detected in the neocortex and cerebellar cortex. The findings show that the anatomic distribution of serotonin uptake sites in the porcine brain is similar to that reported in other mammals. The density was close to that reported in human brain and in rat brain. Synapse 39:351–355, 2001. © 2001 Wiley‐Liss, Inc.