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Eicosanoid Metabolism
EXAM 2
16
Medical
Professional
09/07/2010

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Cards

Term
what is the chief precursor of eicosanoids
Definition
arachidonic acid
Term
what converts phospholipids to arachidonic acid
Definition
Phospholipase A2
Term
what converts arachidonic acid to 5-HPETE
Definition
5-lipoxygenase
Term
what are the two types of 5-HPETE?
Definition
leukotrienes and 5-HETE
Term
what does the synthesis of leukotrienes require
Definition
reduced glutathione
Term
how is arachidonic acid converted to prostaglandins
Definition
cyclooxygenase
Term
How is PGG2 converted to PGH2
Definition
peroxidase and reduced glutathione
Term
how is PGH2 converted to thromboxanes
Definition
thromboxane synthase
Term
arachidonic acid can be derived by what
Definition
phospholipids and dietary linoleic acid
Term
what is the function of prostacylins
Definition
vasodilation, inhibition of platelet aggregation, increased cAMP
Term
NSAIDS acts as blood thinners by blocking what?
Definition
thromboxane synthesis
Term
what is the main difference b/t Tylenol and Aspirin?
Definition
Tylenol has little to no anti-inflammatory effect

it inhibits COX-3
Term
what is the function of LTC4, LTD4, and LTE4?
Definition
contraction of smooth muscle
bronchoconstriction
vasoconstriction
increased vascular permeability
anaphylaxis
Term
these products are the most important leukotrienes in humans.
Definition
5-lipooxygenase products
Term
lipotoxins are synthesized by the combined action of
Definition
5-lipoxygenase and 15 lipoxygenase and synthesis can also occur via LT4
Term
what is inhibited by anti-inflammatory steroids?
Definition
Phospholipase A2
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