English: Positive allosteric modulator agonists (PAM-agonists) move agonist dose-response curves to lower agonist concentrations by increasing agonist affinity and/or increase maximal response by increasing agonist efficacy. NAM-agonists also produce their own agonistic effects.
Plot shows receptor response (%) as a function of logarithmic agonist concentration ([Ago]). This is just an example and the units of concentration do not matter. Solid curve: original agonist response. Dashed curves: 2 possible response curves (out of many alternatives) after PAM-agonist addition. Arrows show approximate direction of the shift of curves after addition.
Adapted from:
Kenakin TP (2017). Pharmacology in drug discovery and development: understanding drug response (2nd ed.). Academic Press. pp. 109–110. ISBN9780128037539.
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