Biomaterial Database

Migration of vascular smooth muscle cells by phospholipase A2 via specific binding sites. 1992

T Kanemasa, and K Hanasaki, and H Arita

Shionogi Research Laboratories, Shionogi & Co., Osaka, Japan.

Pancreatic-type group I phospholipase A2 (PLA2-I), EC 3.1.1.4, long thought to act as a digestive enzyme, has a specific binding site in several types of tissues and cells and these sites promote PLA2-I-stimulated DNA synthesis. In this study we report a PLA2-I action on the migration of rat embryonic thoracic aorta smooth muscle cells (A7r5). A7r5 cells had a single class of PLA2-I binding site with an equilibrium binding constant (Kd) value of 1.7 nM and a maximum binding capacity (Bmax) of 40,000 sites/cell. The migration activity of PLA2-I for A7r5 cells was examined using modified Boyden chambers. PLA2-I stimulated the migration dose-dependently, and the ED50 value was about 1 nM, which was almost the same as the Kd value for PLA2-I binding. Checkerboard analysis showed that the response of A7r5 cells to PLA2-I was chemokinetic, but not chemotactic. These findings reveal a new aspect of PLA2-I in the modulation of vascular function.

UI	MeSH Term	Description	Entries
D007375	Interleukin-1	A soluble factor produced by MONOCYTES; MACROPHAGES, and other cells which activates T-lymphocytes and potentiates their response to mitogens or antigens. Interleukin-1 is a general term refers to either of the two distinct proteins, INTERLEUKIN-1ALPHA and INTERLEUKIN-1BETA. The biological effects of IL-1 include the ability to replace macrophage requirements for T-cell activation.	IL-1,Lymphocyte-Activating Factor,Epidermal Cell Derived Thymocyte-Activating Factor,Interleukin I,Macrophage Cell Factor,T Helper Factor,Epidermal Cell Derived Thymocyte Activating Factor,Interleukin 1,Lymphocyte Activating Factor
D007457	Iodine Radioisotopes	Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.	Radioisotopes, Iodine
D009131	Muscle, Smooth, Vascular	The nonstriated involuntary muscle tissue of blood vessels.	Vascular Smooth Muscle,Muscle, Vascular Smooth,Muscles, Vascular Smooth,Smooth Muscle, Vascular,Smooth Muscles, Vascular,Vascular Smooth Muscles
D010741	Phospholipases A	Phospholipases that hydrolyze one of the acyl groups of phosphoglycerides or glycerophosphatidates.
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D002465	Cell Movement	The movement of cells from one location to another. Distinguish from CYTOKINESIS which is the process of dividing the CYTOPLASM of a cell.	Cell Migration,Locomotion, Cell,Migration, Cell,Motility, Cell,Movement, Cell,Cell Locomotion,Cell Motility,Cell Movements,Movements, Cell
D002630	Chemotactic Factors	Chemical substances that attract or repel cells. The concept denotes especially those factors released as a result of tissue injury, microbial invasion, or immunologic activity, that attract LEUKOCYTES; MACROPHAGES; or other cells to the site of infection or insult.	Chemoattractant,Chemotactic Factor,Chemotaxin,Chemotaxins,Cytotaxinogens,Cytotaxins,Macrophage Chemotactic Factor,Chemoattractants,Chemotactic Factors, Macrophage,Macrophage Chemotactic Factors,Chemotactic Factor, Macrophage,Factor, Chemotactic,Factor, Macrophage Chemotactic
D006893	Hydroxyeicosatetraenoic Acids	Eicosatetraenoic acids substituted in any position by one or more hydroxy groups. They are important intermediates in a series of biosynthetic processes leading from arachidonic acid to a number of biologically active compounds such as prostaglandins, thromboxanes, and leukotrienes.	HETE,Acids, Hydroxyeicosatetraenoic
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
D001013	Aorta, Thoracic	The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.	Aorta, Ascending,Aorta, Descending,Aortic Arch,Aortic Root,Arch of the Aorta,Descending Aorta,Sinotubular Junction,Ascending Aorta,Thoracic Aorta,Aortic Roots,Arch, Aortic,Ascending Aortas,Junction, Sinotubular,Root, Aortic,Sinotubular Junctions