Difference between revisions of "Adrenergic Pharmacology"
Jump to navigation
Jump to search
(5 intermediate revisions by the same user not shown) | |||
Line 4: | Line 4: | ||
! Receptor !! Binding Affinity !! Effects !! Mechanism !! Agonists !! Antagonists | ! Receptor !! Binding Affinity !! Effects !! Mechanism !! Agonists !! Antagonists | ||
|- | |- | ||
− | | α1 || | + | | α1 || NE > Epi >> Iso |
| | | | ||
− | * | + | *Smooth muscle contraction, ↑SVR, ↑MAP |
− | *Phenylephrine | + | *Mydriasis, urethral sphincter contraction |
+ | | | ||
+ | G<sub>q</sub> → PLC → IP<sub>3</sub>/DAG → [Ca<sup>2+</sup>]<sub>i</sub> | ||
+ | | | ||
+ | *NE | ||
+ | *Phenylephrine (pure α1) | ||
*Midodrine | *Midodrine | ||
| | | | ||
Line 14: | Line 19: | ||
*Tamsulosin | *Tamsulosin | ||
|- | |- | ||
− | | α2 || Epi = | + | | α2 || Epi = NE >> Iso |
+ | | | ||
+ | *↑SVR, ↑MAP | ||
+ | *↓insulin release, ↓lipolysis, ↓aqueous humor production | ||
+ | | | ||
+ | presynaptic G<sub>i</sub> → ↓AC → ↓cAMP → ↓NT release | ||
| | | | ||
*Dexmedetomidine | *Dexmedetomidine | ||
Line 24: | Line 34: | ||
*Trazodone | *Trazodone | ||
|- | |- | ||
− | | β1 || Iso > | + | | β1 || Iso > NE > Epi |
+ | | | ||
+ | *↑Chronotropy (myocytes), ↑Inotropy (SA node), ↑SBP | ||
+ | *↑Renin release/↑volume (JGA) | ||
+ | *Amylase secretion | ||
+ | | | ||
+ | G<sub>s</sub> → ↑AC → ↑cAMP | ||
| | | | ||
*Dobutamine | *Dobutamine | ||
Line 35: | Line 51: | ||
*Esmolol | *Esmolol | ||
|- | |- | ||
− | | β2 || Iso > Epi > | + | | β2 || Iso > Epi > NE |
+ | | | ||
+ | *Smooth muscle relaxation, ↓SVR, ↓DBP, ↓MAP | ||
+ | *Bronchodilation | ||
+ | *↑Lipolysis, ↑Insulin release | ||
+ | *Relax uterine smooth muscle | ||
+ | *↑aqueous humor production | ||
+ | | | ||
+ | G<sub>s</sub> → ↑AC → ↑cAMP → ↑PKA | ||
| | | | ||
*Albuterol | *Albuterol | ||
Line 52: | Line 76: | ||
*Labet'''alol''' (anti-α1) | *Labet'''alol''' (anti-α1) | ||
|- | |- | ||
− | | β3 || Iso > Epi = | + | | β3 || Iso > Epi = NE |
+ | | | ||
+ | *Lipolysis | ||
+ | *Bladder detrusor relaxation | ||
+ | | | ||
+ | G<sub>s</sub> → ↑AC → ↑cAMP → ↑PKA | ||
| | | | ||
*Mirabegron | *Mirabegron |
Latest revision as of 06:17, 4 February 2023
Receptor | Binding Affinity | Effects | Mechanism | Agonists | Antagonists |
---|---|---|---|---|---|
α1 | NE > Epi >> Iso |
|
Gq → PLC → IP3/DAG → [Ca2+]i |
|
α1 selective:
|
α2 | Epi = NE >> Iso |
|
presynaptic Gi → ↓AC → ↓cAMP → ↓NT release |
|
Non-selective:
|
β1 | Iso > NE > Epi |
|
Gs → ↑AC → ↑cAMP |
|
Cardiac Selective:
|
β2 | Iso > Epi > NE |
|
Gs → ↑AC → ↑cAMP → ↑PKA |
|
Non-Selective:
|
β3 | Iso > Epi = NE |
|
Gs → ↑AC → ↑cAMP → ↑PKA |
|
|