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Comparison of RR-formoterol with rac-formoterol in bronchodilating effect on human bronchus



Comparison of RR-formoterol with rac-formoterol in bronchodilating effect on human bronchus



Zhejiang Da Xue Xue Bao. Yi Xue Ban 32(4): 300-303



To compare the bronchodilating effect of RR-formoterol (RR-FMT) with that of racemic formoterol (rac-FMT) on human bronchus. Human bronchial spiral strips (2 - 4 mm internal diameter,15 mm length) were suspended in tissue baths under resting tension of 1.0 g. The changes of tension induced by RR-FMT and rac-FMT(10 pmol x L(-1) - 3.2 micromol x L(-1)) in a cumulative concentration manner were studied under resting tension conditions or precontraction with carbamylcholine (10 micromol x L(-1)) or histamine(100 micromol x L(-1)) in human bronchus. The bronchodilating effect of RR-FMT was more potent than that of rac-FMT under resting condition(P<0.05). RR-FMT and rac-FMT reversed histamine or carbamylcholine-induced contraction, and the bronchodilating effect of RR-FMT was more potent than that of rac-FMT (P<0.05). The bronchodilating effect of RR-FMT is more potent than that of rac-FMT in both the resting condition and carbamylcholine or histamine-induced contraction in human bronchus in vitro.

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Accession: 048601198

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PMID: 12970930


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