ArticleClinical and translational science2024
St. John's wort extract with a high hyperforin content does not induce P-glycoprotein activity at the human blood-brain barrier.
Article in Clinical and translational science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Hyperforin as a Multifunctional Specialized Metabolite of Natural Origin for Chronic Diseases: From Molecular Mechanisms to Clinical Translation.Current issues in molecular biology · 2026Review
- Research progress on plant-derived bioactive compounds and late-life depression: from neuroprotective mechanisms to dietary patterns.Frontiers in nutrition · 2026Review
- Designing a Small Molecule for PET Radiotracing: [Molecules (Basel, Switzerland) · 2025Review
- Herb-drug interactions in oncology: pharmacodynamic/pharmacokinetic mechanisms and risk prediction.Chinese medicine · 2025Review
- Imaging the Activity of Efflux Transporters at the Blood-Brain Barrier in Neurologic Diseases: Radiotracer Selection Criteria.Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2025Review
- [Fluids and barriers of the CNS · 2024Article
- St. John's wort extract with a high hyperforin content does not induce P-glycoprotein activity at the human blood-brain barrier.Clinical and translational science · 2024Article
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17 authors.
Funding
Abstract
St. John's wort (SJW) extract, a herbal medicine with antidepressant effects, is a potent inducer of intestinal and/or hepatic cytochrome P450 (CYP) enzymes and P-glycoprotein (P-gp), which can cause clinically relevant drug interactions. It is currently not known whether SJW can also induce P-gp activity at the human blood-brain barrier (BBB), which may potentially lead to decreased brain exposure and efficacy of certain central nervous system (CNS)-targeted P-gp substrate drugs. In this study, we used a combination of positron emission tomography (PET) imaging and cocktail phenotyping to gain a comprehensive picture on the effect of SJW on central and peripheral P-gp and CYP activities. Before and after treatment of healthy volunteers (n = 10) with SJW extract with a high hyperforin content (3-6%) for 12-19 days (1800 mg/day), the activity of P-gp at the BBB was assessed by means of PET imaging with the P-gp substrate [
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