Evidence map›Paper›PMID 22301556›Full record

ArticleScience translational medicine2012

The anti-trypanosome drug fexinidazole shows potential for treating visceral leishmaniasis.

Susan Wyllie, Stephen Patterson, Laste Stojanovski, Frederick R C Simeons, Suzanne Norval, Robert Kime, Kevin D Read, Alan H Fairlamb

Open access · greenAbstract read
In one paragraph

Article in Science translational medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers.

0numbers the graph read from it
0cells of the map it votes in
87citing papers in PubMed
15.4field-weighted citation impact, top 1% 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

87 citing papers in PubMed, 169 citations in OpenAlex.

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  18. Antileishmanial Activities of (Antimicrobial agents and chemotherapy · 2022
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27 more citing papers are in PubMed but not listed here.

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

8 authors at 2 institutions in 1 country.

Susan WyllieDivision of Biological Chemistry and Drug Discovery, Wellcome Trust Biocentre, College of Life Sciences, University of Dundee, Dundee, Scotland, UK.
Stephen Patterson
Laste Stojanovski
Frederick R C Simeons
Suzanne Norval
Robert Kime
Kevin D Read
Alan H Fairlamb
Wellcome Trust · GBUniversity of Dundee · GB

Funding

Wellcome Trust 077705Wellcome Trust 079838Wellcome Trust 083481
6 · The paper itself

Abstract

Safer and more effective oral drugs are required to treat visceral leishmaniasis, a parasitic disease that kills 50,000 to 60,000 people each year in parts of Asia, Africa, and Latin America. Here, we report that fexinidazole, a drug currently in phase 1 clinical trials for treating African trypanosomiasis, shows promise for treating visceral leishmaniasis. This 2-substituted 5-nitroimidazole drug is rapidly oxidized in vivo in mice, dogs, and humans to sulfoxide and sulfone metabolites. Both metabolites of fexinidazole were active against Leishmania donovani amastigotes grown in macrophages, whereas the parent compound was inactive. Pharmacokinetic studies with fexinidazole (200 mg/kg) showed that fexinidazole sulfone achieves blood concentrations in mice above the EC(99) (effective concentration inhibiting growth by 99%) value for at least 24 hours after a single oral dose. A once-daily regimen for 5 days at this dose resulted in a 98.4% suppression of infection in a mouse model of visceral leishmaniasis, equivalent to that seen with the drugs miltefosine and Pentostam, which are currently used clinically to treat this tropical disease. In African trypanosomes, the mode of action of nitro drugs involves reductive activation via a NADH (reduced form of nicotinamide adenine dinucleotide)-dependent bacterial-like nitroreductase. Overexpression of the leishmanial homolog of this nitroreductase in L. donovani increased sensitivity to fexinidazole by 19-fold, indicating that a similar mechanism is involved in both parasites. These findings illustrate the potential of fexinidazole as an oral drug therapy for treating visceral leishmaniasis.

Indexed as

Administration, OralAnimalsBiotransformationCells, CulturedDisease Models, AnimalDose-Response Relationship, DrugDrug Administration ScheduleFemaleLeishmania donovaniLeishmaniasis, VisceralMacrophages, PeritonealMiceMice, Inbred BALB CNitroimidazolesNitroreductasesParasitic Sensitivity TestsfexinidazoleNitroimidazolesNitroreductasesProtozoan ProteinsSulfonesSulfoxidesTrypanocidal Agents

Identifiers

PMID22301556
PMCPMC3457684
OpenAlexW2007520264

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

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.