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September 16, 2015PLoS ONEOpen Access

Angiotensin II Moderately Decreases Plasmodium Infection and Experimental Cerebral Malaria in Mice

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Key result

Continuous infusion of Angiotensin II in mice infected with Plasmodium berghei decreased parasitemia, delayed the onset of experimental cerebral malaria (p=0.0021), and increased survival (p=0.0087).

Population

5-6 weeks old C57BL/6 mice infected with Plasmodium berghei-ANKA and in vitro P. falciparum cultures.

Comparison

Angiotensin II 100 or 500 ng/kg/min delivered… vs Saline buffer delivered via subcutaneous osmotic…

Design

Preclinical

Follow-up

12 days

Authors

JGJulio Gallego‐DelgadoCBCharlotte BaravianIEInnocent A. Edagha

Discussion

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Overview

Hypothesis-generating for angiotensin II in murine malaria; leaves open translation to human cerebral malaria.

Structured PICO

P
Population
44 C57BL/6 mice, 5-6 weeks old, infected with Plasmodium berghei-ANKA to model experimental cerebral malaria, followed for up to 12 days.
I
Intervention
Angiotensin II 100 or 500 ng/kg/min delivered via subcutaneous osmotic mini-pumps (0.25 μl/h) for 14 days.
C
Comparator
Saline buffer (0.25 μl/h) delivered via subcutaneous osmotic mini-pumps.
O
Outcome
Parasitemia levels and incidence of experimental cerebral malaria.

Main Result

p-value: p=0.0021

In a mouse model, continuous infusion of Angiotensin II decreased parasitemia and delayed the onset of experimental cerebral malaria, complementing previous human genetic studies.

Limitations

  • Animal model which may not fully translate to human malaria pathogenesis
  • The exact mechanism of protection (direct parasite inhibition vs indirect immune/cardiovascular effects) remains unclear

Cite This Study

Gallego‐Delgado et al. (2015) studied Experimental Cerebral Malaria (n=44). Angiotensin II vs. Saline buffer was evaluated on Incidence of experimental cerebral malaria (p=0.0021). Continuous infusion of Angiotensin II in mice infected with Plasmodium berghei decreased parasitemia, delayed the onset of experimental cerebral malaria (p=0.0021), and increased survival (p=0.0087).

synapsesocial.com/papers/6a7067463ce530166bc2d1adhttps://doi.org/10.1371/journal.pone.0138191
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Also Consider

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  1. 1Synthetic angiotensin II peptide derivatives confer protection against cerebral and severe non-cerebral malaria in murine models2024 · 4 citations
  2. 2Angiotensin II Is a New Component Involved in Splenic T Lymphocyte Responses during Plasmodium berghei ANKA Infection2013 · 34 citations
  3. 3Targeting Angiotensin II Type-1 Receptor (AT1R) Inhibits the Harmful Phenotype of Plasmodium-Specific CD8+ T Cells during Blood-Stage Malaria2017 · 15 citations
  4. 4Impairment of the Plasmodium falciparum Erythrocytic Cycle Induced by Angiotensin Peptides2011 · 60 citations
  5. 5Angiotensin II exacerbates intracerebral hemorrhage in mice via heparin-like antithrombin activation and coagulation dysfunction2026