Adrenergic receptor agonist applications

Reported bioanalytical applications that use SS-LLE products include both tlie cartridge (tube) format and the microplate format. Some of these applications include the determination of mexiletine [44], amiodarone [45] and other antiarrhythmic drugs [46], proxyphylline [47], 16(3-hydroxystanozolol [48], dextromethorphan [49], and simvastatin [50] from biological fluids. Microplate applications for SS-LLE include a crude purification of crude combinatorial library samples [51], carboxylic acid-based matrix metallo-protease inhibitors [52], and a p3-adrenergic receptor agonist [53]. 

Piletsky SA, Piletska EV, Chen B, Karim K, Weston D, Barrett G, Lowe P, Turner AP. Chemical grafting of molecularly imprinted homopolymers to the surface of microplates. Application of artificial adrenergic receptor in enzyme-linked assay for beta-agonists determination. Anal Chem 2000 72 4381-4385. 

The G-protein coupled receptors modulate intracellular cAMP level, which plays a crucial role in epidermal barrier homeostasis.5 Increase of intracellular cAMP in epidermal keratinocytes by topical application of forskolin delays barrier recovery, while cAMP antagonists accelerate the barrier recovery. Activation of dopamine 2-like receptors (manuscript in preparation), melatonin receptors, or serotonin receptor (type 5-HT1) decreases intracellular cAMP and consequently accelerates the barrier recovery (Figure 15.1), while activation of adrenergic 32 receptors increases intracellular cAMP and delays the barrier repair.6 Barrier disruption induces an increase of the intracellular cAMP level. Thus, topical application of agonists of receptors that reduce intracellular cAMP accelerates the barrier repair. Our results are summarized in Table. 15.1. 

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