Mark T. Clunes

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The perforated patch recording technique was used to investigate the effects of dexamethasone (0.2 microm, 24-30 h), a synthetic glucocorticoid, on membrane conductance in the human airway epithelial cell line H441. Under zero current clamp conditions this hormone induced amiloride-sensitive depolarization of the membrane potential (V(m)). Lowering external(More)
Adenosine (ADO) signaling is altered in both asthma and chronic obstructive pulmonary disease, and the A(2B) adenosine receptor (A(2B)-R) may drive pulmonary inflammation. Accordingly, it has been proposed that specific inhibition of the A(2B)-R could treat inflammatory lung diseases. However, stimulation of the cystic fibrosis transmembrane conductance(More)
Electrophysiological studies of H441 human distal airway epithelial cells showed that thapsigargin caused a Ca(2+)-dependent increase in membrane conductance (G(Tot)) and hyperpolarization of membrane potential (V(m)). These effects reflected a rapid rise in cellular K(+) conductance (G(K)) and a slow fall in amiloride-sensitive Na(+) conductance (G(Na)).(More)
OBJECTIVE The goal of this study was to determine the prevalence of asthma in school children in the tri-island Caribbean nation of Grenada. SETTING, PARTICIPANTS AND OUTCOMES This was a self-report study provided to the guardians of all primary school children between ages 6 and 7 throughout Grenada, Carriacou and Petite Martinique in 2013. Of the 2362(More)
Genetic variants associated with asthma pathogenesis and altered response to drug therapy are discussed. Many studies implicate polymorphisms in genes encoding the enzymes responsible for leukotriene synthesis and intracellular signaling through activation of seven transmembrane domain receptors, such as the cysteinyl leukotriene 1 (CYSLTR1) and 2 (CYSLTR2)(More)
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