Evidence map›Paper›PMID 34090067›Full record

ArticleInternational journal for parasitology. Drugs and drug resistance2021

Plasmodium falciparum resistance to ACTs: Emergence, mechanisms, and outlook.

Faiza Amber Siddiqui, Xiaoying Liang, Liwang Cui

Open access · goldAbstract read
In one paragraph

Article in International journal for parasitology. Drugs and drug resistance, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
13.7field-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

52 citing papers in PubMed, 96 citations in OpenAlex.

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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

3 authors at 1 institution in 1 country.

Faiza Amber SiddiquiDepartment of Internal Medicine, University of South Florida, Tampa, FL, 33612, USA.
Xiaoying LiangDepartment of Internal Medicine, University of South Florida, Tampa, FL, 33612, USA.
Liwang CuiDepartment of Internal Medicine, University of South Florida, Tampa, FL, 33612, USA. Electronic address: liwangcui@usf.edu.
University of South Florida · US

Funding

Southeast Asia Malaria Research CenterU19AI089672 · NIAID · UNIVERSITY OF SOUTH FLORIDA · PI CUI, LIWANG · 2010 to 2023
$28.9M
Molecular Mechanisms of Artemisinin ResistanceR01AI128940 · NIAID · UNIVERSITY OF SOUTH FLORIDA · PI CUI, LIWANG · 2017 to 2021
$971k
NIAID NIH HHS R01 AI128940NIAID NIH HHS U19 AI089672
6 · The paper itself

Abstract

Emergence and spread of resistance in Plasmodium falciparum to the frontline treatment artemisinin-based combination therapies (ACTs) in the epicenter of multidrug resistance of Southeast Asia threaten global malaria control and elimination. Artemisinin (ART) resistance (or tolerance) is defined clinically as delayed parasite clearance after treatment with an ART drug. The resistance phenotype is restricted to the early ring stage and can be measured in vitro using a ring-stage survival assay. ART resistance is associated with mutations in the propeller domain of the Kelch family protein K13. As a pro-drug, ART is activated primarily by heme, which is mainly derived from hemoglobin digestion in the food vacuole. Activated ARTs can react promiscuously with a wide range of cellular targets, disrupting cellular protein homeostasis. Consistent with this mode of action for ARTs, the molecular mechanisms of K13-mediated ART resistance involve reduced hemoglobin uptake/digestion and increased cellular stress response. Mutations in other genes such as AP-2μ (adaptor protein-2 μ subunit), UBP-1 (ubiquitin-binding protein-1), and Falcipain 2a that interfere with hemoglobin uptake and digestion also increase resistance to ARTs. ART resistance has facilitated the development of resistance to the partner drugs, resulting in rapidly declining ACT efficacies. The molecular markers for resistance to the partner drugs are mostly associated with point mutations in the two food vacuole membrane transporters PfCRT and PfMDR1, and amplification of pfmdr1 and the two aspartic protease genes plasmepsin 2 and 3. It has been observed that mutations in these genes can have opposing effects on sensitivities to different partner drugs, which serve as the principle for designing triple ACTs and drug rotation. Although clinical ACT resistance is restricted to Southeast Asia, surveillance for drug resistance using in vivo clinical efficacy, in vitro assays, and molecular approaches is required to prevent or slow down the spread of resistant parasites.

Indexed as

AntimalarialsMalaria, FalciparumDrug ResistanceHumansPlasmodium falciparumProtozoan ProteinsAntimalarialsProtozoan ProteinsArtemisininDrug resistanceHemoglobin digestionK13Molecular surveillancepfcrtpfmdr1PiperaquinePlasmodium falciparumStress response

Identifiers

PMID34090067
PMCPMC8188179
OpenAlexW3167164223

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.