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- W96613985 abstract "Muscarinic receptors play an important role in the regulation of tracheobronchial secretion. Tracheal epithelium was cut into small pieces (approx.10 mm/sup 2/) and dissociated using collagenase in HEPES-Ringer solution at 37/sup 0/C. After dissociation the glands cells were isolated by discontinuous Percoll density gradient centrifugation. Submucosal gland cells concentrated above the layers with densities of 1.084 and 1.057 g/ml after centrifugation at x 500 g for 10 min at 15/sup 0/C. Cell viability was > 95% as determined by exclusion of trypan blue. Over 98% of the isolated cells were identified by periodic acid Schiff staining method to be gland cells. Muscarinic receptors on intact gland cells were characterized using the binding of specific muscarinic antagonist (/sup 3/H)quinuclidinyl benzilate ((/sup 3/H)QNB) binding. Scatchard plot analysis of saturation isotherms, showed that the maximal receptor density (B/sub max/) and dissociation constant (K/sub D/) were 7400 +/- 200 sites/cell and 100 +/- 20 pM, respectively (n = 3). These two parameters were less than those from cat tracheal gland cells, B/sub max/ = 42,000 sites/cell and K/sub D/ = 200 pM. In conclusion, this study provided a useful method to isolate tracheal gland cells and characterized the presence of muscarinic receptors on isolatedmore » intact cells.« less" @default.
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- W96613985 date "1986-03-05" @default.
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- W96613985 title "Characterization of muscarinic receptors on isolated swine tracheal submucosal gland cells" @default.
- W96613985 hasPublicationYear "1986" @default.
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