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Table 2 Maximum relaxation (E max ) and potency (pD 2 ) observed with non-selective TAS2R agonists and reference relaxing agents (isoproterenol, formoterol and theophylline) on human bronchi

From: The expression and relaxant effect of bitter taste receptors in human bronchi

 

Emax(%)

pD2

n

Control

15.0 ± 3.5

NA

11

Chloroquine

94.2 ± 2.3

4.2 ± 0.1

10-24

Quinine

89.5 ± 3.0

3.7 ± 0.2

9

Caffeine

75.6 ± 6.3

3.7 ± 0.3

11

Strychnine

68.7 ± 7.8

4.0 ± 0.4

10

Diphenidol

65.9 ± 9.0

4.6 ± 0.4

11

Denatonium

38.6 ± 3.6

NA

11

Saccharin

27.6 ± 5.5

NA

10

Ofloxacin

21.9 ± 5.1

NA

11

Colchicine

18.3 ± 3.7

NA

10

Isoproterenol

99.8 ± 0.2

7.7 ± 0.1

11

Formoterol

75.9 ± 5.0

8.9 ± 0.2

11

Theophylline

100.0 ± 0.0

3.9 ± 0.1

10

  1. Emax values are expressed as a percentage of the relaxation observed with 3 mM theophylline (mean ± SEM of experiments performed on isolated bronchi from n distinct patients).