Biomaterial Database

Leukotriene C4 binding sites in mouse brain: pharmacological characteristics. 1987

A Goffinet, and A Nguyen

Positron Tomography Laboratory, University of Louvain, Louvain-la-Neuve, Belgium.

The binding sites for [3H]leukotriene C4 were studied in membrane preparations of mouse brain and liver. Isotherm binding analysis revealed one binding site with a Kd of 10.39 +/- 1.97 nM (Scatchard) or 10.15 +/- 1.00 nM (non-linear). The maximal binding capacity (Bmax) was 49.20 +/- 3.80 (Scatchard) or 48.50 +/- 2.63 (non-linear) pmol/mg prot. Specific binding represented more than 90% of the total binding. In displacement reactions on brain membranes, LTC4 was 100 times more active than LTD4, which displayed 10 times the activity of GSH. Glutamic acid, bilirubin and hematin were inactive. The activity of LTC4 was slightly less on liver membranes than on brain membranes. Liver sites had some affinity for GSH but not for LTD4 bilirubin or hematin. The results support the hypothesis that LTC4 and its receptor may have a neuromodulatory function.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D011982	Receptors, Prostaglandin	Cell surface receptors that bind prostaglandins with high affinity and trigger intracellular changes which influence the behavior of cells. Prostaglandin receptor subtypes have been tentatively named according to their relative affinities for the endogenous prostaglandins. They include those which prefer prostaglandin D2 (DP receptors), prostaglandin E2 (EP1, EP2, and EP3 receptors), prostaglandin F2-alpha (FP receptors), and prostacyclin (IP receptors).	Prostaglandin Receptors,Prostaglandin Receptor,Receptor, Prostaglandin,Receptors, Prostaglandins,Prostaglandins Receptors
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
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001667	Binding, Competitive	The interaction of two or more substrates or ligands with the same binding site. The displacement of one by the other is used in quantitative and selective affinity measurements.	Competitive Binding
D013189	SRS-A	A group of LEUKOTRIENES; (LTC4; LTD4; and LTE4) that is the major mediator of BRONCHOCONSTRICTION; HYPERSENSITIVITY; and other allergic reactions. Earlier studies described a "slow-reacting substance of ANAPHYLAXIS" released from lung by cobra venom or after anaphylactic shock. The relationship between SRS-A leukotrienes was established by UV which showed the presence of the conjugated triene. (From Merck Index, 11th ed)	Slow Reacting Substance of Anaphylaxis
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D018077	Receptors, Leukotriene	Cell-surface receptors that bind LEUKOTRIENES with high affinity and trigger intracellular changes influencing the behavior of cells. The leukotriene receptor subtypes have been tentatively named according to their affinities for the endogenous leukotrienes LTB4; LTC4; LTD4; and LTE4.	Leukotriene Receptors,Receptors, SRS-A,SRS-A Receptors,Leukotriene Receptor,Receptors, Leukotrienes,SRS-A Receptor,Slow Reacting Substance of Anaphylaxis Receptors,Slow Reaction Substance of Anaphylaxis Receptors,Leukotrienes Receptors,Receptor, Leukotriene,Receptor, SRS-A,Receptors, SRS A,SRS A Receptor,SRS A Receptors
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In