Evidence map›Paper›PMID 29282057›Full record

ArticleMalaria journal2017

In vitro anti-malarial interaction and gametocytocidal activity of cryptolepine.

Arnold Donkor Forkuo, Charles Ansah, Kwesi Boadu Mensah, Kofi Annan, Ben Gyan, Anjo Theron, Dalu Mancama, Colin W Wright

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.7field-weighted citation impact, top 30% 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

16 citing papers in PubMed, 41 citations in OpenAlex.

  1. Article
  2. First Evidence of Anti-Biomedicines · 2025
    Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Antimalarial Natural Products.Progress in the chemistry of organic natural products · 2022
    Article
  10. Review
  11. Article
  12. Article
  13. Indole: The After Next Scaffold of Antiplasmodial Agents?Drug design, development and therapy · 2020
    Review
  14. Article
  15. Article
  16. Cryptolepine, the Main Alkaloid of the AntimalarialBiochemistry research international · 2019
    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

8 authors at 4 institutions in 3 countries.

Arnold Donkor ForkuoDepartment of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. forkuoarnold@yahoo.com.
Charles AnsahDepartment of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Kwesi Boadu MensahDepartment of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Kofi AnnanDepartment of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Ben GyanDepartment of Immunology, Noguchi Memorial Institute for Biomedical Research, University of Ghana, Legon, Ghana.
Anjo TheronBiosciences, Council for Scientific and Industrial Research, P.O. Box 395, Pretoria, 0001, South Africa.
Dalu MancamaBiosciences, Council for Scientific and Industrial Research, P.O. Box 395, Pretoria, 0001, South Africa.
Colin W WrightSchool of Pharmacy, University of Bradford, West Yorkshire, BD7 1DP, UK.
Kwame Nkrumah University of Science and Technology · GHCouncil for Scientific and Industrial Research · ZANoguchi Memorial Institute for Medical Research · GHUniversity of Bradford · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDiscovery of novel gametocytocidal molecules is a major pharmacological strategy in the elimination and eradication of malaria. The high patronage of the aqueous root extract of the popular West African anti-malarial plant Cryptolepis sanguinolenta (Periplocaceae) in traditional and hospital settings in Ghana has directed this study investigating the gametocytocidal activity of the plant and its major alkaloid, cryptolepine. This study also investigates the anti-malarial interaction of cryptolepine with standard anti-malarials, as the search for new anti-malarial combinations continues.

methodsThe resazurin-based assay was employed in evaluating the gametocytocidal properties of C. sanguinolenta and cryptolepine against the late stage (IV/V) gametocytes of Plasmodium falciparum (NF54). A fixed ratio method based on the SYBR Green I fluorescence-based assay was used to build isobolograms from a combination of cryptolepine with four standard anti-malarial drugs in vitro using the chloroquine sensitive strain 3D7.

resultsCryptolepis sanguinolenta (IC

conclusionsThe findings of this study shed light on the high gametocytocidal properties of C. sanguinolenta and cryptolepine attributing their potent anti-malarial activity mainly to their effect on both the sexual and asexual stages of the parasite. Amodiaquine is a potential drug partner for cryptolepine in the development of novel fixed dose combinations.

Indexed as

AlkaloidsAntimalarialsChloroquineEthanolaminesFluorenesGametogenesisGhanaHumansIndole AlkaloidsLife Cycle StagesLumefantrineMalariaMalaria, FalciparumMefloquinePlant ExtractsPlasmodium falciparumAlkaloidsAntimalarialsChloroquinecryptolepineEthanolaminesFluorenesIndole AlkaloidsLumefantrineMefloquinePlant ExtractsQuinolinesAnti-malarial drug combinationsCryptolepineCryptolepis sanguinolentaGametocytocidalMalaria

Identifiers

PMID29282057
PMCPMC5745596
OpenAlexW2778454648

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.