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Pathology Final Exam- Factors and Signals
Signalling molecules, cytokines, chemokines, factors, etc.
112
Pathology
Professional
02/02/2012

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Term
ADP
Definition
Activates platelet aggregation; causes release of ADP for platelet aggregation
Term
Thromboxane A2
Definition
amplifies platelet aggregation
Term
PAR- protease activated receptor
Definition
Binds to thrombin to cause aggregation
Term
Fibrinogen
Definition
Large protein that bridges between platelets to promote aggregation
Term
P-selectin
Definition
binds leukocytes to platelets and endothelium
Term
Thrombin
Definition
Stimulates neutrophil and macrophage adhesion and promotes inflammation
Term
Thrombin
Definition
Most important coagulation factor
Term
Factor XIIIa
Definition
Stabilizes fibrin polymers in secondary plug
Term
Factor XII- Hageman factor
Definition
Starts intrinsic clotting cascade when exposed to thrombogenic surface
Term
Antithrombin III
Definition
Inhibits activity of thrombin; binds to heparin-like molecules of endothelium
Term
TFPI
Definition
Inactivates Tissue Factor- Factor VIIa complex
Term
D-dimers/Fibrin Split Products
Definition
Diagnostic for DVT, DIC, Pulmonary Edema
Term
Plasminogen
Definition
Catabolized to make plasmin
Term
Alpha 2 Plasmin Inhibitor
Definition
Restricts and deactivates plasmin
Term
Platelet Factor 4
Definition
Bonds to heparin-
Term
Platelet Factor 4
Definition
Acts as a target for antibodies when bound to heparin in cases of Heparin Induced Thrombocytopenia (HIT)
Term
tPA
Definition
Required for trophoblast invasion of the uterus
Term
Fibrin
Definition
The cause of widespread thrombi in DIC
Term
Factor XII
Definition
Activated by endotoxin to promote coagulation
Term
NO
Definition
Inhibits platelet aggregation; potent vasodilator
Term
Ca2++
Definition
Cofactor in the coagulation pathways
Term
Factor V
Definition
A gene mutation for this factor causes HYPERcoagulability
Term
Antithrombin III
Definition
Prevents thrombosis- is activated by Heparin
Term
Thrombomodulin
Definition
Binds to thrombin and inhibits coagulation by activating protein C
Term
Platelet factor 4
Definition
Promotes platelet aggregation
Term
AD Phosphatase
Definition
Degrades ADP and inhibits platelet aggregation
Term
Factor X
Definition
Convergence of the extrinsic and intrinsic coagulation pathways
Term
Factor 9
Definition
Deficiency causes Hemophilia B
Term
Factor 8
Definition
Deficiency causes Hemophilia A
Term
Factor 8
Definition
Reduced/deficient in Von Willebrands Disease (Not vWF)
Term
Protein C
Definition
Inhibits Va and VIIIa- if deficient, causes hypercoagulability
Term
Anti-thrombin III
Definition
Required for heparin binding
Term
Thromboxanes
Definition
Cause platelet aggregation; can be inhibited by aspirin
Term
Urokinase
Definition
Clot buster (like tPA)
Term
Coumadin
Definition
Inhibits Vitamin K
Term
coumadin
Definition
Administered for prophylaxis for DVT
Term
Thromboplastin
Definition
released in brain injury; starts extrinsic pathway (also called Tissue factor, factor III)
Term
Tissue Factor
Definition
released in brain injury; starts extrinsic pathway (also called thromboplastin, factor III)
Term
vWF
Definition
Starts intrinsic pathway
Term
vWF
Definition
Deficiency causes increased bleeding time; binds to factor VIII causing platelet adhesion
Term
TNF
Definition
Activates clotting in sepsis
Term
D-dimers/Fibrin split products
Definition
Signify elevated fibrinolysis
Term
Endothelin
Definition
Potent endothelial-derived vasoconstrictor
Term
Tissue Factor/Factor III
Definition
exposed at site of injury- procoagulant glycoprotein- acts with factor VII
Term
Factor VII
Definition
Acts with factor III to initiate extrinsic clotting cascade
Term
Thrombin
Definition
Result of clotting cascade- cleaves fibrinogen to fibrin
Term
thrombin
Definition
recruits and activates platelets
Term
Tissue Plasminogen Activator
Definition
Limits the size of the clot plug- cleaves plasminogen to make plasmin
Term
PGI2
Definition
Produced by endothelium; prevents platelet adhesion; vasodilator
Term
Nitric Oxide
Definition
Produced by endothelium; prevents platelet adhesion; causes vasodilation
Term
Thrombomodulin
Definition
Heparin-like anticoagulant; converts thrombin from procoagulant to anticoagulant form via Protein C
Term
TFPI
Definition
Heparin-like anticoagulant on cell surface that inhibits Factor VIIa and Xa
Term
Protein S
Definition
Cofactor for Protein C
Term
Plasmin-
Definition
Cleaves fibrin to degrade thrombosis
Term
PAI
Definition
Limits fibrinolysis- favors thrombosis
Term
vWFactor
Definition
Bridge between platelet surface receptors and exposed collagen
Term
GpIb
Definition
Platelet surface receptor
Term
Alpha 2 Macroglobin
Definition
Serum- antiprotease- stops inflammation
Term
Alpha 1 Antitrypsin
Definition
Neutrophil- antiprotease- stops inflammation
Term
IFN Gamma
Definition
Major activator of macrophages
Term
Eotaxin
Definition
Chemokine for eosinophil recruitment
Term
Major Basic Protein
Definition
Toxic to parasites AND mammalian epithelium
Term
Fc receptor
Definition
Binds IgE on Mast Cells
Term
Interferon Gamma
Definition
Secreted by activated T-Cells; mediates granulomatous inflammation
Term
Tumor Necrosis Factor (TNF)
Definition
Secreted by activated macrophages; activates lymphocytes and fibroblasts
Term
C5a
Definition
Complement fragment that is chemotactic for neutrophils
Term
TGF beta
Definition
From macrophages- promotes fibrosis
Term
N.O.
Definition
Potent vasodilator that takes over after the short-term effects of histamine
Term
Sialyated Oligosaccharides
Definition
Bind to selectins in rolling of neutrophils
Term
VCAM-1
Definition
Binds to integrins in firm adhesion
Term
Integrin Beta Chain
Definition
A genetic lack of this prevents firm adhesion- cause of LAD
Term
Histaminee
Definition
Contracts endothelium; separates gap junctions; increases permeability
Term
IL-1, TNF, and IFN Gamma
Definition
Increased permeability that is delayed in onset and long in duration
Term
Mucin-like glycoproteins
Definition
Ligands for leukocyte adhesion molecule CD44
Term
PAF
Definition
Move P-selectin from stores to cell surface (along with histamine and thrombin)
Term
TNF and IL-1
Definition
Stimulate venular adhesion molecules
Term
Chemokines
Definition
Stimulate adherent leukocytes to pass through interendothelial spaces
Term
P-Selectin
Definition
Major roll in ROLLING of leukocytes
Term
MPO
Definition
converts H2O2 to HOCl
Term
C3a
Definition
Critical complement activator
Term
Serotonin
Definition
Vasodilator from platelets and enterochromaffin cells
Term
THROMBIN
Definition
Main link between coagulation system and acute inflammation
Term
Hageman Factor
Definition
Initiates clotting, kinins, fibrinolysis, and complement
Term
Lipoxins
Definition
Inhibit leukocyte recruitment and block cellular components of inflammation
Term
Platelet Agg. Factor
Definition
Causes most of the features of inflammation
Term
PAF
Definition
Causes bronchoconstriction and vasoconstriction as well as leukocyte adhesion
Term
iNOS
Definition
Calcium independent inducible NOS
Term
NOS
Definition
Vasodilation, platelet antagonism, reduced leukocyte recruitment, microbicidal activity
Term
Prothrombin
Definition
Mutations in the gene for this cause increased thrombosis and increased PT
Term
prothrombin
Definition
Antibodies binding to this give false positive for syphillis
Term
Glycoprotein Ib
Definition
How platelets adhere to vWF
Term
Vitamin K
Definition
Without this cofactor, bleeding is the result due to a breakdown of multiple pathways
Term
GpIIb-IIIa
Definition
How platelets bind to each other using fibrinogen and this
Term
Glycoprotein IIb-IIIa
Definition
Antibodies against this are antiplatelet; this is seen in ITP
Term
D-DIMERS
Definition
ELIZA test for this is elevated in pulmonary embolism
Term
Endotoxin
Definition
High levels of this cause the release of TNF, IL-1, IL-6, and IL-8
Term
C5a fragment
Definition
Powerful chemotactic factor and activator of neutrophils; increases vascular permeability
Term
C3b fragment
Definition
Opsonin that promotes phagocytosis
Term
HISTAMINE
Definition
Release of this is stimulated by C3a and C5a
Term
CHEMOKINES
Definition
Chemotactic for neutrophils, eosinophils, lymphocytes, monocytes, and basophils
Term
Bradykinin
Definition
Causes pain and increased vascular permeability
Term
Prostaglandins
Definition
Vasodilation at the site of inflammation
Term
IL-1 and Tumor Necrosis Factor
Definition
Leukocyte release from the bone marrow
Term
IL-1 along with TNF
Definition
Major fever producing cytokines
Term
Integrins
Definition
Leukocyte transmigration- firm adhesion
Term
Leukotriene B4
Definition
Chemotactic agent
Term
I.N.F. Gamma
Definition
Transforms macrophages into epitheliod cells in granulomatous inflammation
Term
leukotrienes
Definition
increase permeability
Term
PGE2
Definition
FEVER- stimulates hypothalamus
Term
Acute phase proteins
Definition
C-reactive protein; fibrinogen; serum amyloid A protein- opsonization and clearing of necrotic cells
Term
Fibrinogen-inflammation
Definition
Causes RBC to stack up- ROULEAUX
Term
Thrombomodulin
Definition
Endothelial surface receptor that converts thrombin from pro-coag to anti-coag
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