Inflammation Flashcards
granulocyte which are non phagocytic cells
basophils
prominent in allergic reactions and parasitic infections
eosinophils
neutrophils
polymorphonuclear cells
first to arrive at the site of inflammation
neutrophils
second to migrate at the site of inflammation
monocytes
found in tissues of all types of inflammation, esp. after acute increase of neutrophils
lymphocytes
monocytes becomes part of the tissue and then becomes?
macrophage
2 distinct cells of lymphocytes
memory cells, plasma cells
Mediators of inflammation
- proteins
- peptides
- glycoproteins
- cytokines
- arachidonic acid metabolites
- nitric oxide
- oxygen free radicals
- vasoactive amines
responsible for hemodynamic and vascular changes
vasoactive amines
Roles of histamines
- cause immediate vascular changes (vasoconstriction, vasodilation)
- cause increase of vascular permeability
- demonstrate chemotactic for eosinophils
regulate almost all immune cells in response to inflammation following activation of platelets
serotonin
serotonin are found in
a. Gastrointestinal tract (GIT)
b. Central Nervous System (CNS)
c. dense granules of platelets
2 plasma factors
kinin system, complement system
plasma contacts with these then activate the Hageman factor (Factor XII)
- collagen
- endotoxins
- basement membrane proteins
these are the most important mediators of inflammation
complement system
2 pathways which activates the 2 pathways
- Classical pathway
- Non-immunologic stimuli
activates Prostaglandin from arachidonic metabolites
Cyclooxygenase pathway
leukotrienes are derived thru
lipoxygenase pathway
produces pain potentiating the effect of bradykinin and act on the hypothalamic mechanism of fever production
Prostaglandin E2
inhibit platelet aggregation
PG12 (Prostacycline)
LTB4
potent chemotactic agent for neutrophil and monocyte macrophage
powerful stimulator of vascular permeability, 1000 times potency than histamine
LTC4, LTD4, LTE4
activators of inflammation
- hydrolytic enzymes
- proteases
- cationic proteins
leukocyte substances
- hydrolytic enzymes
- proteases
- cationic proteins
SRSA
slow reactive substances of anaphylaxis
biologically active substances produced by T-cells during immune system
Lymphokines
Key features of Chronicity
- caused by persistent inflammatory stimulus in which the host failed to completely rid the tissue of invader
- inflammatory response is accompanied with immune response due to persistence of invader
- highlighted by evidence of host tissue contributions in terms of reparative response
- characterized histiologically by both mononuclear infiltrates cells and by CT cells such as fibroblasts
Cellular Phases of Inflammatory Response
- margination and pigmenting
- diapedesis
- chemotaxis
- phagocytosis
Major events of inflammation
- Changes in vascular flow
- increase vascular permeability
- leukocyte exudation
promote leukocyte adhesion
- ELAM 1
- ICAM
- Interleukin 1 + Tumor necrosis factor
ELAM 1
endothelial leukocyte adhesion molecule 1
ICAM
intracellular adhesion molecule
explain the process of leukocyte exudation
- leukocyte adhesion
- immigration
- phagocytosis
- intracellular degradation of ingested particles
- extracellular release of leukocyte products
substance which alter body temperature
pyrogen
fever
- elevation of body temperature
- clinical condition associated with variety of disease stage
occurs as a result of contraction of endothelium elicited by chemical mediators
immediate transient response
caused by sever injury which leads to endothelial necrosis
immediate sustained reaction
due to direct injury to endothelium causing intracellular gaps
delayed prolonged leakage
components of inflammation
vascular bed, blood, connective tissue
inflammation involves
blood, vessels, cells
function of accumulated fluid in site of injury
- dilute
- localize
- destroy
- remove
causes of inflammation
- pathogenic microorganisms
- chemical injuries
- mechanical and thermal injuries
- immune reactions
advantages of inflammation
- protect surrounding tissue by localizing and isolating injured tissue
- neutralize and inactivate toxins
- destroys and inhibit the growth of pathogenic microorganisms
- prepares injured area for healing and repair