Relaxant Effect of Urginea maritima on Tracheal Smooth Muscle Mediated by the Effect on Beta-2 Adrenergic, Muscarinic Receptors and Calcium and Potassium Channels

Table 2

Correlations between different concentrations and the relaxant effects of U. maritima extract and theophylline.

Contractile agents	Studied agents	Conditions	R	value
KCl	U. maritime	Nonincubated	0.967
		Atropine-incubated	0.936
		Indomethacin-incubated	0.976
		Chlorpheniramine-incubated	0.965
	Theophylline	Nonincubated	0.899
		Nonincubated	0.960
		Diltiazem-incubated	0.963
Methacholine	—	Glibenclamide-incubated	0.961
	U. maritima	Propranolol-incubated	0.946
	Theophylline	Nonincubated	0.966

Data were presented as mean ± SEM.