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clinical Neuro
Prostaglandins
45
Biology
Graduate
01/16/2008

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Term
Prostaglandin are formed from what precursor
Definition
Archnidonic acid
Term
NSAIDs target ______ preventing what
Definition
Cyclooxygenase preventing Archidonic acid conversion to Prostaglandins
Term
Name the function of PGE2
Definition

Vasodilator

Fever inducer

Cytoprotective

Term
What is the function of PGI2
Definition

Vasodilator

Platelet inhibitor

Term
What's the function of TXA2
Definition

Vasoconstrictor

Platelet activator

Term
What's the function of PGF2 a
Definition

Contracts the uterus

Lowers intraocular P

Term
Name the Prostaglandins
Definition

PGE2

PGI2

TXA2

PGF2a

PGF2 a
Term
What class of drug is Vioxx
Definition
Cox inhibitor
Term
What's the problem w/ Vioxx
Definition
inhibits PGI2 and not TXA2 so it disinhibitis platelet aggregation form PGI2 and TXA2 just exaberates it
Term
Prostaglandin & Thromboxane act as potent local _____
Definition
Hormones
Term
cyclooxygenase is an enzyme used for the production of
Definition
Prostaglandins and Thromboxane
Term
5-lipoxygnease produces
Definition
Leukotriene from archnidonic acid
Term
Are leukotriene inhibited by COX inhibitors?
Definition
No
Term
leukotriene is synthesized by
Definition
WBC
Term
Prostagladins act on what kind of receptors
Definition
G-protein
Term
PGE2 is removed from the body how?
Definition
The lungs removes it
Term
What enzymes are used to deactive PGE2
Definition
PG reductase and 15 hydroxyl PG hydrogenase
Term
What's the inactive form of PGE2
Definition
14-dihydro-PGE2
Term
when are PGD2, PGE2 and PGI2 produce in unusal circumstances
Definition

PGD2 by Mastocytosis

PGE2 by solid tumors w/ metastasis to bone

PGI2 by pregnancy

Term
What are the 8 clinical uses for Prostaglandins
Definition

1. Penile dysfunction

2. Menstration

3. Induce labor

4. Termination of labor

5. Gastric secretion

6. Ductus Arteriosus

7. Pulmonary HTN

8. Glucoma

Term
which prostaglandin is used to treat penile dysfunction
Definition
PGE1
Term
What's the mechanism of action of PGE1 on penile dysfuction
Definition
Relaxes smooth muscle and dilators major arteries in the penis enchancing blood flow
Term
What are some side effects of treating penile dysfuction w/ PGE1
Definition
Penile pain and prolonged erection
Term
Which two prostaglandins are used to stimulate menstration?
Definition
PGE2 and PGF2
Term
What are the MOA of PGE2 and PGF2 on menstration
Definition
increases endometrial synthesis of PGE2 and PGF2 which contracts the uterus
Term
Which prostaglandin is used to induce labor?
Definition
PGE2
Term
Which Prostaglandins are used to induce labor at any term
Definition
PGF2a and PGE2
Term
Which type of Prostaglandins are used as protective agsinst gastric uclers produced by steriods and NSAIDs
Definition
E-type
Term
Prostaglandins stimulate the production of ___ in the stomach
Definition
mucin
Term
Why does the ductus arterioles remain open in premature deliveries
Definition
Due to the high production of prostaglandins
Term
Neonates w/ congenital heart disease depnd on ____ for survival
Definition
PG
Term
What are the side effects of Alprostadil. What is it used for?
Definition

Fever, flushing, bradycardia or tachycardia

Used to maintain the patency of the ductus arteriosus

Term
Which Prostaglandin is used in Pulmonary HTN
Definition
Epoprostenol
Term
Epoprestenol increase cardiac ____ & ____
Definition
index and SV
Term
Epoprestenol decreases pulmonary _____
Definition
pulmonary vascular resistance, total pulmonary resistance
Term
Which two Prostaglandins are used to treat Glaucoma
Definition
PGE2 and PGF2a
Term
How do PG treat glaucoma
Definition
Lower intraocular pressure due to the increase outflow of aqueous humor
Term
Name the 5 PG drugs
Definition

Alprostadil

Dinoprostone

Epoprostenol

Latanoprostol

Misoprostol

Term
What effects does Alprostadil have?
Definition
Increase blood flow and oxygenation by vessel relaxation
Term
What are the uses of Alprostadil
Definition
Neonatal defects and Penile erection
Term
What's the MOA of Dinoprostone
Definition
Increase uterine contraction
Term
When would you use Dinoprostenol
Definition
Induction of labor and Abortion
Term
What is the effect of Epoprostenol and what is it used for
Definition

Reduce platelet aggregation

Peripheral vascular disease

Term
What's the effect of Latanprostol and it's use
Definition
Reduce intraocular pressure and is used to treat glaucoma
Term
Misoprostol is used to ____ ____ ____ ____ thus allowing _____ ____ to heal
Definition
Suppress gastric acid secretion
gastric uclers
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