Evidence map›Paper›PMID 26343146›Full record

ArticleCritical care (London, England)2015

The role of previously unmeasured organic acids in the pathogenesis of severe malaria.

M Trent Herdman, Natthida Sriboonvorakul, Stije J Leopold, Sam Douthwaite, Sanjib Mohanty, M Mahtab Uddin Hassan, Richard J Maude, Hugh W F Kingston, Katherine Plewes, Prakaykaew Charunwatthana and 12 more

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Critical care (London, England), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
2.0field-weighted citation impact, top 13% 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

15 citing papers in PubMed, 21 citations in OpenAlex.

  1. Trial
  2. Application of a Non-Targeted Metabolomics Study inInternational journal of molecular sciences · 2025
    Article
  3. Article
  4. Observational
  5. Article
  6. Article
  7. Severe malaria.Malaria journal · 2022
    Review
  8. Review
  9. Review
  10. Article
  11. Article
  12. Observational
  13. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

22 authors at 7 institutions in 4 countries.

M Trent HerdmanMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. mtherdman@gmail.com.
Natthida SriboonvorakulMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. Natthida@tropmedres.ac.
Stije J LeopoldMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. stije@tropmedres.ac.
Sam DouthwaiteMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. samdouthwaite.1@googlemail.com.
Sanjib MohantyIspat General Hospital, Rourkela, Orissa, India. sanjibmalaria@rediffmail.com.
M Mahtab Uddin HassanChittagong Medical College Hospital, Chittagong, Bangladesh. mahtabnipu@yahoo.com.
Richard J MaudeMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. richard@tropmedres.ac.
Hugh W F KingstonMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. hugh@tropmedres.ac.
Katherine PlewesMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. Katherine@tropmedres.ac.
Prakaykaew CharunwatthanaMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. Jib@tropmedres.ac.
Kamolrat SilamutMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. oye@tropmedres.ac.
Charles J WoodrowMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. Charlie@tropmedres.ac.
Aniruddha Ghose
Kesinee ChotinavichMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. nok@tropmedres.ac.
Md Amir HossainChittagong Medical College Hospital, Chittagong, Bangladesh. amir_hossain_ctg@yahoo.com.
M Abul FaizDev Care Foundation, Dhaka, Bangladesh. drmafaiz@gmail.com.
Saroj MishraIspat General Hospital, Rourkela, Orissa, India. sarojrkl@gmail.com.
Natchanun LeepipatpiboonDepartment of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand. Natchanun.L@chula.ac.th.
Nicholas J WhiteMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. nickwdt@tropmedres.ac.
Nicholas P J DayMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. Nickd@tropmedres.ac.
Joel TarningMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. joel@tropmedres.ac.
Arjen M DondorpMahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. arjen@tropmedres.ac.
Mahidol University · THMahidol Oxford Tropical Medicine Research Unit · THChittagong Medical College · BDIspat General Hospital · INChild Health Research Foundation · BDChulalongkorn University · THUniversity of Oxford · GB

Funding

Wellcome Trust 089275/Z/09/ZWellcome Trust 093956
6 · The paper itself

Abstract

introductionSevere falciparum malaria is commonly complicated by metabolic acidosis. Together with lactic acid (LA), other previously unmeasured acids have been implicated in the pathogenesis of falciparum malaria.

methodsIn this prospective study, we characterised organic acids in adults with severe falciparum malaria in India and Bangladesh. Liquid chromatography-mass spectrometry was used to measure organic acids in plasma and urine. Patients were followed until recovery or death.

resultsPatients with severe malaria (n=138), uncomplicated malaria (n=102), sepsis (n=32) and febrile encephalopathy (n=35) were included. Strong ion gap (mean ± SD) was elevated in severe malaria (8.2 mEq/L ± 4.5) and severe sepsis (8.6 mEq/L ± 7.7) compared with uncomplicated malaria (6.0 mEq/L ± 5.1) and encephalopathy (6.6 mEq/L ± 4.7). Compared with uncomplicated malaria, severe malaria was characterised by elevated plasma LA, hydroxyphenyllactic acid (HPLA), α-hydroxybutyric acid and β-hydroxybutyric acid (all P<0.05). In urine, concentrations of methylmalonic, ethylmalonic and α-ketoglutaric acids were also elevated. Multivariate logistic regression showed that plasma HPLA was a strong independent predictor of death (odds ratio [OR] 3.5, 95 % confidence interval [CI] 1.6-7.5, P=0.001), comparable to LA (OR 3.5, 95 % CI 1.5-7.8, P=0.003) (combined area under the receiver operating characteristic curve 0.81).

conclusionsNewly identified acids, in addition to LA, are elevated in patients with severe malaria and are highly predictive of fatal outcome. Further characterisation of their sources and metabolic pathways is now needed.

Indexed as

3-Hydroxybutyric AcidAcidosisAdolescentAdultAgedChromatography, LiquidFemaleHumansHydroxybutyratesKetoglutaric AcidsLactic AcidMalaria, FalciparumMaleMalonatesMass SpectrometryMethylmalonic Acid2-hydroxybutyric acid3-Hydroxybutyric Acid4-hydroxyphenyllactic acidethylmalonic acidHydroxybutyratesKetoglutaric AcidsLactic AcidMalonatesMethylmalonic AcidPhenylpropionates

Identifiers

PMID26343146
PMCPMC4561438
OpenAlexW2159360938

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.