Evidence map›Paper›PMID 33844145›Full record

ArticleEuropean journal of drug metabolism and pharmacokinetics2021

Cytochrome P450 Enzyme Inhibition and Herb-Drug Interaction Potential of Medicinal Plant Extracts Used for Management of Diabetes in Nigeria.

Ogochukwu Amaeze, Heather Eng, Lauren Horlbogen, Manthena V S Varma, Angela Slitt

Open access · greenAbstract read
In one paragraph

Article in European journal of drug metabolism and pharmacokinetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.9field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 16 citations in OpenAlex.

  1. Review
  2. Review
  3. Review
  4. Review
  5. Evaluation of reversible cytochrome P450 inhibition by Withania somnifera leaf and root extracts.Drug metabolism and disposition: the biological fate of chemicals · 2025
    Article
  6. Article
  7. Research on Moringa (Plants (Basel, Switzerland) · 2024
    Review
  8. Article
  9. Article
  10. Review
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Ogochukwu AmaezeDepartment of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Rd, Kingston, RI, 02881, USA.
Heather EngPharmacokinetics, Dynamics and Metabolism, Pfizer Inc., Groton, CT, USA.
Lauren HorlbogenPharmacokinetics, Dynamics and Metabolism, Pfizer Inc., Groton, CT, USA.
Manthena V S VarmaPharmacokinetics, Dynamics and Metabolism, Pfizer Inc., Groton, CT, USA.
Angela SlittDepartment of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, 7 Greenhouse Rd, Kingston, RI, 02881, USA. aslitt@uri.edu.ORCID http://orcid.org/0000-0002-0572-7001
Pfizer (United States) · USUniversity of Rhode Island · US

Funding

Sources, Transport, Exposure & Effects of PFAS (STEEP) Center - RENEWALP42ES027706 · NIEHS · UNIVERSITY OF RHODE ISLAND · PI Elsie Mareca Sunderland · 2017 to 2026
$18.9M
NIEHS NIH HHS P42 ES027706NIH HHS P42ES027706
6 · The paper itself

Abstract

BACKGROUND AND

objectiveThe use of herbal medicines is common in Africa, and patients often use a combination of herbs and drugs. Concurrent herbal and pharmaceuticals treatments can cause adverse effects through herb-drug interactions (HDI). This study evaluated the potential risk of HDI for five medicinal plants, Vernonia amygdalina, Ocimum gratissimum, Moringa oleifera, Azadirachta indica, and Picralima nitida, using in vitro assays. Patients with diabetes and some other disease conditions commonly use these medicinal plants in Nigeria, and little is known regarding their potential for drug interaction, despite their enormous use.

methodsCrude extracts of the medicinal plants were evaluated for reversible and time-dependent inhibition (TDI) activity of six cytochrome P450 (CYP) enzymes using pooled human liver microsomes and cocktail probe-based assays. Enzyme activity was determined by quantifying marker metabolites' formation using liquid chromatography-mass spectrometry/mass spectrometry. The drug interaction potential was predicted for each herbal extract using the in vitro half-maximal inhibitory concentration (IC

resultsO. gratissimum methanol extracts reversibly inhibited CYP 1A2, 2C8, 2C9 and 2C19 enzymes (IC

conclusionsThe medicinal plants inhibited CYP activity in vitro, with the potential to cause in vivo HDI. Clinical risk assessment and proactive monitoring are recommended for patients who use these medicinal plants concurrently with drugs that are cleared through CYP metabolism.

Indexed as

Chromatography, LiquidCytochrome P-450 Enzyme InhibitorsDiabetes MellitusFemaleHerb-Drug InteractionsHumansHypoglycemic AgentsInhibitory Concentration 50In Vitro TechniquesMaleMicrosomes, LiverNigeriaPlant ExtractsPlants, MedicinalTandem Mass SpectrometryCytochrome P-450 Enzyme InhibitorsHypoglycemic AgentsPlant Extracts

Identifiers

PMID33844145
PMCPMC11774566
OpenAlexW3152956474

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.