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The purpose of this study was to analyze the acute and chronic effects of NGF on the electrophysiological and anatomical properties of neurons in airway parasympathetic ganglia from adult guinea pigs. Using single cell recording, direct application of NGF caused a lasting decrease in the cumulative action potential afterhyperpolarization (AHP) and increased the amplitude of vagus nerve-stimulated nicotinic fast excitatory postsynaptic potentials. Neuronal responsiveness to nicotinic receptor stimulation was increased by NGF, which was blocked by the tyrosine kinase inhibitor, K-252a, implicating neurotrophin-specific (Trk) receptors. Neurotrophin-3 and brain-derived neurotrophic factor had no effect on the synaptic potentials, AHP, or nicotinic response; inhibition of cyclooxygenase with indomethacin inhibited the effect of NGF on the cumulative AHP. Forty-eight hours after in vivo application of NGF to the trachealis muscle caused an increase in dendritic length on innervating neurons. These results are the first to demonstrate that NGF increases the excitability of lower airway parasympathetic neurons, primarily through enhanced synaptic efficacy and changes to intrinsic neuron properties. NGF also had dramatic effects on the growth of dendrites in vivo. Such effects may indicate a new role for NGF in the regulation of parasympathetic tone in the diseased or inflamed lower airways. <\/jats:p>","DOI":"10.1152\/ajplung.00216.2006","type":"journal-article","created":{"date-parts":[[2006,12,9]],"date-time":"2006-12-09T01:49:38Z","timestamp":1165628978000},"page":"L992-L1001","source":"Crossref","is-referenced-by-count":26,"title":["Nerve growth factor acutely potentiates synaptic transmission in vitro and induces dendritic growth in vivo on adult neurons in airway parasympathetic ganglia"],"prefix":"10.1152","volume":"292","author":[{"given":"Mehdi S.","family":"Hazari","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jenny H.","family":"Pan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Allen C.","family":"Myers","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"24","reference":[{"key":"R1","doi-asserted-by":"publisher","DOI":"10.1124\/mol.64.4.974"},{"key":"R2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2222.2004.1868.x"},{"key":"R3","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.93.20.10955"},{"key":"R4","doi-asserted-by":"publisher","DOI":"10.1152\/ajplung.1997.272.4.L731"},{"key":"R5","doi-asserted-by":"publisher","DOI":"10.1152\/ajpregu.00001.2002"},{"key":"R6","doi-asserted-by":"publisher","DOI":"10.1097\/00063198-200101000-00001"},{"key":"R7","doi-asserted-by":"publisher","DOI":"10.1016\/S0896-6273(00)80266-4"},{"key":"R8","doi-asserted-by":"crossref","unstructured":"Dekkers J, Navarrete R. 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