Biomaterial Database

Studies on tissue factor activity and production by leukocytes of human umbilical cord and adult origin. 1975

R P Rivers, and W E Hathaway

Human adult and umbilical cord-derived leukocytes were shown to be capable of generating tissue factor activity on exposure to endotoxin and to reduced pH. Blood for leukocyte separation was collected from normal adults and from newly delivered sections of umbilical cord and mixed leukocyte preparations were obtained by separation over methyl cellulose Hypaque. The coagulant activity of the cell suspension was assayed using a one-stage or two-stage method. Cord-derived leukocytes were shown to develop greater coagulant activity than adult-derived leukocytes when stimulated by endotoxin in vitro at 2,000 cells/mm-3. This response to endotoxin was partially inhibited by prior exposure of the cells to prostaglandin (PG) E1 an to L-epinephrine. Acetylcholine stimulated the production of coagulant activity in the absence of endotoxin. Both cord and adult-derived leukocytes (20,000/mm-3) developed coagulant activity when exposed to pH reduction by lactic or hydrochloric acids and this activity was shown to be tissue factor.

UI	MeSH Term	Description	Entries
D007773	Lactates	Salts or esters of LACTIC ACID containing the general formula CH3CHOHCOOR.
D007962	Leukocytes	White blood cells. These include granular leukocytes (BASOPHILS; EOSINOPHILS; and NEUTROPHILS) as well as non-granular leukocytes (LYMPHOCYTES and MONOCYTES).	Blood Cells, White,Blood Corpuscles, White,White Blood Cells,White Blood Corpuscles,Blood Cell, White,Blood Corpuscle, White,Corpuscle, White Blood,Corpuscles, White Blood,Leukocyte,White Blood Cell,White Blood Corpuscle
D008214	Lymphocytes	White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each), or NATURAL KILLER CELLS.	Lymphoid Cells,Cell, Lymphoid,Cells, Lymphoid,Lymphocyte,Lymphoid Cell
D009000	Monocytes	Large, phagocytic mononuclear leukocytes produced in the vertebrate BONE MARROW and released into the BLOOD; contain a large, oval or somewhat indented nucleus surrounded by voluminous cytoplasm and numerous organelles.	Monocyte
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
D001777	Blood Coagulation	The process of the interaction of BLOOD COAGULATION FACTORS that results in an insoluble FIBRIN clot.	Blood Clotting,Coagulation, Blood,Blood Clottings,Clotting, Blood
D003973	Diatrizoate	A commonly used x-ray contrast medium. As DIATRIZOATE MEGLUMINE and as Diatrizoate sodium, it is used for gastrointestinal studies, angiography, and urography.	Amidotrezoate,Amidotrizoate,Benzoic acid, 3,5-bis(acetylamino)-2,4,6-triiodo-,Diatrizoate Sodium,Diatrizoic Acid,Hypaque,Hypaque 50,Sodium Diatrizoate,Sodium-Magnesium Diatrizoate,Urogranoic Acid,Urothrast,Urotrast,Diatrizoate, Sodium,Diatrizoate, Sodium-Magnesium
D004211	Disseminated Intravascular Coagulation	A disorder characterized by procoagulant substances entering the general circulation causing a systemic thrombotic process. The activation of the clotting mechanism may arise from any of a number of disorders. A majority of the patients manifest skin lesions, sometimes leading to PURPURA FULMINANS.	Consumption Coagulopathy,Coagulation, Disseminated Intravascular,Disseminated Coagulation, Intravascular,Intravascular Coagulation, Disseminated,Intravascular Disseminated Coagulation,Coagulation, Intravascular Disseminated,Coagulations, Disseminated Intravascular,Coagulations, Intravascular Disseminated,Coagulopathies, Consumption,Coagulopathy, Consumption,Consumption Coagulopathies,Disseminated Coagulations, Intravascular,Disseminated Intravascular Coagulations,Intravascular Coagulations, Disseminated,Intravascular Disseminated Coagulations
D004731	Endotoxins	Toxins closely associated with the living cytoplasm or cell wall of certain microorganisms, which do not readily diffuse into the culture medium, but are released upon lysis of the cells.	Endotoxin
D004804	Eosinophils	Granular leukocytes with a nucleus that usually has two lobes connected by a slender thread of chromatin, and cytoplasm containing coarse, round granules that are uniform in size and stainable by eosin.	Eosinophil