| Attributes | Values |
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| rdf:type
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| rdfs:seeAlso
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| Description
| - What is known and Objective: The opioid effect of tramadol, which can be detected by pupillary response, is predominantly mediated by the O-demethylated metabolite, formed via CYP2D6. This study was designed to evaluate the effects of tramadol using different parameters of pupillometry as biomarkers. Methods: Sixty-nine healthy volunteers received tramadol hydrochloride drops orally at a dose of 0.7 mg/kg. Pre-dose and 2-h post-dose pupillometric measurements were performed. The polymorphism of CYP2D6 was analysed. Results and Discussion: Large interindividual variability was observed in the tramadol-induced pupillary reaction. Miosis was induced in 69.6% and mydriasis in 30.4% of the subjects. The pupillary response differed in relation to the CYP2D6 genotype. A maximal difference in initial pupil diameter of 0.81 mm was found in extensive metabolizers. There were significant effects observed on the pupillary light reflex parameters with tramadol administration (P < 0.05) except for the reflex amplitude and constriction velocity. What is new and Conclusion: The pharmacodynamic effects of tramadol were easily detected using both static and dynamic pupil parameters. The pharmacodynamic profiles were markedly influenced by the CYP2D6 phenotype.
- What is known and Objective: The opioid effect of tramadol, which can be detected by pupillary response, is predominantly mediated by the O-demethylated metabolite, formed via CYP2D6. This study was designed to evaluate the effects of tramadol using different parameters of pupillometry as biomarkers. Methods: Sixty-nine healthy volunteers received tramadol hydrochloride drops orally at a dose of 0.7 mg/kg. Pre-dose and 2-h post-dose pupillometric measurements were performed. The polymorphism of CYP2D6 was analysed. Results and Discussion: Large interindividual variability was observed in the tramadol-induced pupillary reaction. Miosis was induced in 69.6% and mydriasis in 30.4% of the subjects. The pupillary response differed in relation to the CYP2D6 genotype. A maximal difference in initial pupil diameter of 0.81 mm was found in extensive metabolizers. There were significant effects observed on the pupillary light reflex parameters with tramadol administration (P < 0.05) except for the reflex amplitude and constriction velocity. What is new and Conclusion: The pharmacodynamic effects of tramadol were easily detected using both static and dynamic pupil parameters. The pharmacodynamic profiles were markedly influenced by the CYP2D6 phenotype. (en)
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| Title
| - Pupillometry in healthy volunteers as a biomarker of tramadol efficacy
- Pupillometry in healthy volunteers as a biomarker of tramadol efficacy (en)
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| skos:prefLabel
| - Pupillometry in healthy volunteers as a biomarker of tramadol efficacy
- Pupillometry in healthy volunteers as a biomarker of tramadol efficacy (en)
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| skos:notation
| - RIV/00064165:_____/11:9530!RIV12-MZ0-00064165
|
| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/00064165:_____/11:9530
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - CYP2D6; pharmacodynamics; pharmacogenetics; pupillometry; tramadol; alzheimers-disease; cyp2d6 polymorphism; pupillary response; pharmacokinetics; morphine; tropicamide; light (en)
|
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Journal of Clinical Pharmacy and Therapeutics
|
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Chytil, Lukáš
- Slanař, Ondřej
- Matoušková, Olga
- Perlík, František
|
| http://linked.open...ain/vavai/riv/wos
| |
| http://linked.open...n/vavai/riv/zamer
| |
| issn
| |
| number of pages
| |
| is http://linked.open...avai/riv/vysledek
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