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https://hdl.handle.net/2440/3866
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Type: | Journal article |
Title: | Uptake and release of [3H]adenosine in human dental pulp |
Author: | Marino, V. Parker, D. |
Citation: | Archives of Oral Biology, 2003; 48(4):293-298 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2003 |
ISSN: | 0003-9969 1879-1506 |
Abstract: | The purpose of this study was to examine the uptake and release of adenosine in human dental pulp. Pulp was removed from extracted teeth and incubated in [3H]adenosine (0.02-3.2 micromol/l) for 30-90 min, washed for 30 min and the residual [3H]adenosine extracted and assayed. At 0.02 and 0.4 micromol/l the uptake was saturated after 30 min, whereas at 3.2 micromol/l it was not, even after 90 min. Destruction of the sympathetic nerves by 6-hydroxydopamine prior to incubation in [3H]adenosine (0.4 micromol/l) decreased the uptake of [3H] by 40%. Addition of S(4-nitrobenzyl)-6-thioguanosine (NBTG; 0.1 micromol/l), an inhibitor of adenosine uptake, blocked 90% of the uptake. Electrical stimulation of sympathetic nerves following incubation of pulp in [3H]adenosine (0.4 micromol/l) increased the overflow of [3H] into the medium superfusing the tissue segments. NBTG (0.1 micromol/l) had no effect on this overflow, whereas denervation with 6-hydroxydopamine prior to incubation decreased the overflow by 85%. Although the contribution of post-junctional elements, such as smooth muscle, to this release was not determined it is proposed that most of the purine released was derived from sympathetic nerves. |
Keywords: | Sympathetic Nervous System Dental Pulp Humans Tritium Purines Adenosine Culture Techniques Electric Stimulation Dose-Response Relationship, Drug |
DOI: | 10.1016/S0003-9969(03)00009-8 |
Published version: | http://dx.doi.org/10.1016/s0003-9969(03)00009-8 |
Appears in Collections: | Aurora harvest 6 Dentistry publications |
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