Intracellular Signaling Mechanisms Pharmacological Action of Jasminum amplexicaule Buch.-Ham. (Oleaceae) on Gastrointestinal Secretion

Jasminum amplexicaule Buch.-Ham. (Oleaceae) has been commonly used in the traditional medicine in dysentery, diarrhoea and bellyache in China. In the present work, the methanol extract of Jasminum amplexicaule (JME) was examined for pharmacology on human colonic epithelial cell line T84 by the short-circuit current technique. The results showed that pretreatment of T84 cells with JME produced a concentration-dependent (0-1000 g/ml. EC50 = 0.055 mg/ml) inhibition effect on adrenalin (Adr.)–induced Cl- secretion. The maximal response was observed at 200 g/ml. It has been demonstrated that JME has a direct effect on the enterocyte. Our results also demonstrated that the JME exerted inhibitory effect on gastrointestinal Cl- secretion that effected by acting on basolateral β-adrenoreceptors. These results suggest that the Chinese traditional medicine of JME can be used for the treatment of acute diarrhea and bellyache.