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Ecosanoids
Immunity PGE2
MyeloidDrieved Suppresive T Cells
Dendretic (antigen presenting) cels
Natural killer cells
supression
Thrombosis
Clotting
endothelium
PGI2
platelets aggregation
vasodilatation
TXA2 Platelets
Ca+2
vasoconstriction
platelets aggregation
balanced PGI2 & TXA2
Platelets
PGE2
platelets aggregation
vasodilatation
Kidney
PGI2
PGE2
vasodilatation Renal Blood Flow
Angiotensin 2
GFR
sympathetic activity
stimulated by
opposing vasoconstriction of norepinephrine
GIT
renin Na+ excretion Cl reabsorption
B.P.
PGI2
PGE2
mucous thickening,turnover,blood flow&Hco3- HCl
PGF2alpha contaction darrhea & spasm maintain peristalsis
Uterus
contraction oxytocin sensitivity
softening cervix facilitating sperm movement
Respiratory tract
PGE2
PGF2
potent bronchodilatation
potent bronchoconstriction
Inflammation
PGE2
PGD2
Fever,Stupor,Erythema,Wheel formation
capillary permeabiity
Temperature PEG2
Fever causing cytokine(IL-1)
hypothalamus temperature
M.O. growth Repair
NSAIDs
Nonselective
Cox inhibitors
Salicylate,mefenamic acid
Diclophenac,piroxicam
Indomethacin,Ibuprofen
Selective Cox
2 inhibitors
celecoxib, meloxicam
safe to ulcerative stomach
NOT safe to
stomach,kidner
children
Reye syndrome
Brain&liver dysfunction
pain,fever,inflammation
Cox3(dark horse)
Inhibitor
poor anti-inflammatory,analgesic,antipyretic
by viral infection
little efect on coc1&2
ex: paracetamol & dipyrone
safe to children
Biosynthesis
acting central
acting central&peripheral
PG catabolism
rapidly removed from circulation
90%of metabolism in liver

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Eicosanoids Pharmacology.

  • 1. Ecosanoids Immunity PGE2 MyeloidDrieved Suppresive T Cells Dendretic (antigen presenting) cels Natural killer cells supression Thrombosis Clotting endothelium PGI2 platelets aggregation vasodilatation TXA2 Platelets Ca+2 vasoconstriction platelets aggregation balanced PGI2 & TXA2 Platelets PGE2 platelets aggregation vasodilatation Kidney PGI2 PGE2 vasodilatation Renal Blood Flow Angiotensin 2 GFR sympathetic activity stimulated by opposing vasoconstriction of norepinephrine GIT renin Na+ excretion Cl reabsorption B.P. PGI2 PGE2 mucous thickening,turnover,blood flow&Hco3- HCl PGF2alpha contaction darrhea & spasm maintain peristalsis Uterus contraction oxytocin sensitivity softening cervix facilitating sperm movement Respiratory tract PGE2 PGF2 potent bronchodilatation potent bronchoconstriction Inflammation PGE2 PGD2 Fever,Stupor,Erythema,Wheel formation capillary permeabiity Temperature PEG2 Fever causing cytokine(IL-1) hypothalamus temperature M.O. growth Repair NSAIDs Nonselective Cox inhibitors Salicylate,mefenamic acid Diclophenac,piroxicam Indomethacin,Ibuprofen Selective Cox 2 inhibitors celecoxib, meloxicam safe to ulcerative stomach NOT safe to stomach,kidner children Reye syndrome Brain&liver dysfunction pain,fever,inflammation Cox3(dark horse) Inhibitor poor anti-inflammatory,analgesic,antipyretic by viral infection little efect on coc1&2 ex: paracetamol & dipyrone safe to children Biosynthesis acting central acting central&peripheral PG catabolism rapidly removed from circulation 90%of metabolism in liver