Distribution of sup 125 I-neurotensin binding sites in human forebrain: Comparison with the localization of acetylcholinesterase

Journal Article · Sun Jul 22 00:00:00 EDT 1990 · Journal of Comparative Neurology; (USA)

DOI:https://doi.org/10.1002/cne.902970403· OSTI ID:6528739

Szigethy, E; Quirion, R; Beaudet, A ^[1]

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1. Montreal Neurological Institute, Quebec (Canada)

The distribution of 125I-neurotensin binding sites was compared with that of acetylcholinesterase reactivity in the human basal forebrain by using combined light microscopic radioautography/histochemistry. High 125I-neurotensin binding densities were observed in the bed nucleus of the stria terminalis, islands of Calleja, claustrum, olfactory tubercle, and central nucleus of the amygdala; lower levels were seen in the caudate, putamen, medial septum, diagonal band nucleus, and nucleus basalis of Meynert. Adjacent sections processed for cholinesterase histochemistry demonstrated a regional overlap between the distribution of labeled neurotensin binding sites and that of intense acetylcholinesterase staining in all of the above regions, except in the bed nucleus of the stria terminalis, claustrum, and central amygdaloid nucleus, where dense 125I-neurotensin labeling was detected over areas containing only weak to moderate cholinesterase staining. At higher magnification, 125I-neurotensin-labeled binding sites in the islands of Calleja, supraoptic nucleus of the hypothalamus, medial septum, diagonal band nucleus, and nucleus basalis of Meynert were selectively associated with neuronal perikarya found to be cholinesterase-positive in adjacent sections. Moderate 125I-neurotensin binding was also apparent over the cholinesterase-reactive neuropil of these latter three regions. These data suggest that neurotensin (NT) may directly influence the activity of magnocellular cholinergic neurons in the human basal forebrain, and may be involved in the physiopathology of dementing disorders such as Alzheimer's disease, in which these neurons have been shown to be affected.

• OSTI ID: 6528739
• Journal Information: Journal of Comparative Neurology; (USA), Vol. 297:4; ISSN 0021-9967
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
CHOLINESTERASE
TISSUE DISTRIBUTION
PEPTIDES
RECEPTORS
ACETYLCHOLINE
AUTORADIOGRAPHY
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL FUNCTIONS
BRAIN
COMPARATIVE EVALUATIONS
IODINE 125
MAN
NERVE CELLS
NERVOUS SYSTEM DISEASES
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AMMONIUM COMPOUNDS
ANIMAL CELLS
ANIMALS
AUTONOMIC NERVOUS SYSTEM AGENTS
BETA DECAY RADIOISOTOPES
BODY
CARBOXYLESTERASES
CENTRAL NERVOUS SYSTEM
DAYS LIVING RADIOISOTOPES
DISEASES
DISTRIBUTION
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
ENZYMES
ESTERASES
ESTERS
FUNCTIONS
HYDROLASES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
KINETICS
MAMMALS
MEMBRANE PROTEINS
NERVOUS SYSTEM
NEUROREGULATORS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PARASYMPATHOMIMETICS
PRIMATES
PROTEINS
QUATERNARY COMPOUNDS
RADIOISOTOPES
REACTION KINETICS
SOMATIC CELLS
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