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Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs
Published on: May 15, 2019
Entacapone.
1St. Joseph Hospital Berlin-Weissensee, Department of Neurology, Berlin, Germany. thomas.mueller@ruhr-uni-bochum.de
Expert Opinion on Drug Metabolism & Toxicology
|June 25, 2010
Summary
Levodopa (LD) treatment for Parkinson's disease (PD) causes motor complications due to plasma fluctuations. Entacapone (EN) can help manage wearing off by extending LD half-life, but may increase peak dose dyskinesia.
Area of Science:
- Neuroscience
- Pharmacology
- Clinical Neurology
Background:
- Levodopa (LD) is a primary treatment for Parkinson's disease (PD).
- LD's short half-life leads to plasma fluctuations, causing motor complications.
- These fluctuations impact the quality of life for PD patients.
Purpose of the Study:
- To review the peripheral factors in motor complication development related to LD metabolism.
- To analyze the impact of entacapone (EN) on LD pharmacokinetics and motor complications.
Main Methods:
- Literature review focusing on LD metabolism and motor complications.
- Analysis of pharmacokinetic data regarding LD, carbidopa (CD), and entacapone (EN) interactions.
Main Results:
- LD troughs correlate with 'wearing off' (reappearance of motor symptoms).
- Entacapone (EN) addition to LD/carbidopa (CD) can alleviate wearing off by prolonging LD half-life.
- While initial EN addition doesn't increase peak LD, repeated supplementation elevates LD bioavailability and peaks, potentially worsening peak-dose dyskinesia.
Conclusions:
- Pharmacokinetic insights may explain the STRIDE-PD study's outcome regarding LD/CD/EN therapy.
- Dyskinesia management might necessitate LD dose reduction or adjusted dosing intervals, rather than fixed uptitration schedules.
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