Cited by 36Research on Leishmaniasis StudiesLeprosy Research and TreatmentTrypanosoma species research and implications

Glutamine supplementation improves the efficacy of miltefosine treatment for visceral leishmaniasis

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Ferreira, Carolina, Mesquita, Inês, Barbosa, Ana Margarida, Osório, Nuno Sampaio, Torrado, Egídio, Beauparlant, Charles-Joly, Droit, Arnaud, Cunha, Cristina +4 more·2020·PLOS Neglected Tropical Diseases

Abstract

BACKGROUND: The disturbance of host metabolic pathways by Leishmania parasites has crucial consequences for the activation status of immune cells and the outcome of infection. Glutamine has been described as an immunomodulatory amino acid, yet its role during Leishmania infection is still unknown. METHODS: We performed transcriptomics in uninfected and L. donovani-infected macrophages 6 hours post-infection. Glutamine quantification by HPLC was assessed in the supernatant of macrophages throughout the infection course. For experimental L. donovani infections, mice were infected with 1.0 x 108 stationary L. donovani promastigotes. Glutaminase (GLS) chemical inhibition was performed using BPTES and glutamine was administered throughout infection. For combined therapy experiment, a daily administration of miltefosine and glutamine was performed by oral gavage. Parasite burden was determined using a Taqman-based assay. Immune cell phenotyping and cytotoxicity were performed in splenic cells using flow cytometry. FINDINGS: We show that glutamine is essential for the control of L. donovani infection. Transcriptomic analysis of L. donovani-infected macrophages demonstrated an upregulation of genes involved in glutamine metabolism. Pharmacological inhibition of glutaminolysis significantly increased the susceptibility to infection, accompanied by an increased recruitment of anti-inflammatory myeloid cells and impaired T cell responses. Remarkably, the supplementation of glutamine to mice infected with L. donovani during miltefosine treatment potentiates parasite clearance through the development of a more effective anti-Leishmania adaptive immune response. CONCLUSIONS: Our data indicates that dietary glutamine supplementation may act as a promising adjuvant for the treatment of visceral leishmaniasis.

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Crossref · 10.1371/journal.pntd.0008125

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  • Glutamine supplementation can offer a therapeutic approach for critical illnesses.

    “Under these conditions, several studies have reported that glutamine supplementation can offer a therapeutic approach for these critical illnesses145–147.”

    From Glutamine reliance in cell metabolism (2020) · cites this paper as [145]

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  1. [38]Carr EL, Kelman A, Wu GS, Gopaul R, Senkevitch E, Aghvanyan A, et al Glutamine Uptake and Metabolism Are Coordinately Regulated by ERK/MAPK during T Lymphocyte Activation. J Immunol. 2010 10.4049/jimmunol.0903586 20554958 PMC2897897 · DOI · Paper page

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Authors
Ferreira, C., Mesquita, I., Barbosa, A. M., Osório, N. S., Torrado, E., Beauparlant, C.-J., Droit, A., Cunha, C., Carvalho, A., Saha, B., Estaquier, J., & Silvestre, R.
Affiliations
  • University of Minho (PT)
  • Université Laval (CA)
  • National Centre for Cell Science (IN)
Corresponding author
Silvestre, Ricardo
Venue
PLOS Neglected Tropical Diseases
Published
2020-03-26
Volume
14
Issue
3
Pages
e0008125
ISSN
  • 1935-2727 (ISSN-L)
  • 1935-2735
OpenAlex
W3013566561
Cited by
35
References
46
Citations by year
2025: 1 · 2024: 4 · 2023: 14 · 2022: 6 · 2021: 6 · 2020: 4
FWCI
6.00
Type
journal article
Language
en
Open access
Locations
  • PLoS neglected tropical diseases (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Fundação para a Ciência e a Tecnologia (PD/BDE/127830/2016, SFRH/BD/120127/2016, SFRH/BD/120371/2016, IF/00474/2014, IF/01390/2014, CEECIND/03628/2017, CEECIND/04600/2017, IF/00021/2014)
  • Horizon 2020 Framework Programme (INLEISH)
  • Canada Research Chairs
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Research on Leishmaniasis Studies
  • Health Sciences › Medicine › Infectious Diseases › Leprosy Research and Treatment
  • Health Sciences › Medicine › Epidemiology › Trypanosoma species research and implications
Keywords
glutamine supplementation, miltefosine, visceral leishmaniasis, Leishmania donovani, glutamine metabolism, glutaminase inhibition, BPTES, macrophages, parasite clearance, T cell response, myeloid cell recruitment, adjuvant therapy, host-parasite metabolic interactions
MeSH terms
Animals, Antiprotozoal Agents, Disease Models, Animal, Female, Glutamine, Humans, Immunologic Factors, Leishmaniasis, Visceral, Macrophages, Male, Mice, Inbred C57BL, Phosphorylcholine, T-Lymphocyte Subsets, Treatment Outcome, Dietary Supplements, Parasite Load

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