Biomaterial Database

Muscarinic and dopaminergic receptors in the aging human brain. 1987

J O Rinne

[3H]1-Quinuclidinyl(phenyl)-4-benzilate ([3H]QNB), [3H]spiroperidol and [3H]flupenthixol were used to label brain muscarinic, dopamine D2 and D1 receptors, respectively, in altogether 78 patients aged from 4 to 93 years. The binding of [3H]QNB declined with age in the frontal cortex, hippocampus, caudate nucleus and putamen. Scatchard analysis showed that the reduced binding was due to a decline in the number of receptors. The binding of the dopaminergic ligands was determined in the caudate nucleus, putamen, pallidum and substantia nigra. [3H]Spiroperidol binding showed age-dependent decline in all the brain areas examined, while no change was seen in [3H]flupenthixol binding in any brain area studied. Also the decrease in [3H]spiroperidol binding was due to the reduced number of receptors. The results of this study suggest that aging is more likely to affect certain neurotransmitter receptor systems than certain brain areas.

UI	MeSH Term	Description	Entries
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011453	Prostaglandins	A group of compounds derived from unsaturated 20-carbon fatty acids, primarily arachidonic acid, via the cyclooxygenase pathway. They are extremely potent mediators of a diverse group of physiological processes.	Prostaglandin,Prostanoid,Prostanoids
D011813	Quinuclidinyl Benzilate	A high-affinity muscarinic antagonist commonly used as a tool in animal and tissue studies.	Benzilate, Quinuclidinyl
D011954	Receptors, Dopamine	Cell-surface proteins that bind dopamine with high affinity and trigger intracellular changes influencing the behavior of cells.	Dopamine Receptors,Dopamine Receptor,Receptor, Dopamine
D011976	Receptors, Muscarinic	One of the two major classes of cholinergic receptors. Muscarinic receptors were originally defined by their preference for MUSCARINE over NICOTINE. There are several subtypes (usually M1, M2, M3....) that are characterized by their cellular actions, pharmacology, and molecular biology.	Muscarinic Acetylcholine Receptors,Muscarinic Receptors,Muscarinic Acetylcholine Receptor,Muscarinic Receptor,Acetylcholine Receptor, Muscarinic,Acetylcholine Receptors, Muscarinic,Receptor, Muscarinic,Receptor, Muscarinic Acetylcholine,Receptors, Muscarinic Acetylcholine
D012044	Regression Analysis	Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.	Regression Diagnostics,Statistical Regression,Analysis, Regression,Analyses, Regression,Diagnostics, Regression,Regression Analyses,Regression, Statistical,Regressions, Statistical,Statistical Regressions
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D005475	Flupenthixol	A thioxanthene neuroleptic that, unlike CHLORPROMAZINE, is claimed to have CNS-activating properties. It is used in the treatment of psychoses although not in excited or manic patients. (From Martindale, The Extra Pharmacopoeia, 30th ed, p595)	Emergil,Fluanxol,Flupentixol,alpha-Flupenthixol,cis-Flupenthixol