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In vitro activity of phospholipase A2 and of peptides from Crotalus durissus terrificus venom against amastigote and promastigote forms of Leishmania (L.) infantum chagasi

Overview of attention for article published in Journal of Venomous Animals and Toxins including Tropical Diseases, November 2015
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • Among the highest-scoring outputs from this source (#32 of 230)
  • Good Attention Score compared to outputs of the same age (72nd percentile)
  • Good Attention Score compared to outputs of the same age and source (78th percentile)

Mentioned by

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3 tweeters
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4 Facebook pages
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1 Google+ user

Citations

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9 Dimensions

Readers on

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52 Mendeley
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Title
In vitro activity of phospholipase A2 and of peptides from Crotalus durissus terrificus venom against amastigote and promastigote forms of Leishmania (L.) infantum chagasi
Published in
Journal of Venomous Animals and Toxins including Tropical Diseases, November 2015
DOI 10.1186/s40409-015-0049-0
Pubmed ID
Authors

Gustavo A. C. Barros, Andreia V. Pereira, Luciana C. Barros, Airton Lourenço Jr, Sueli A. Calvi, Lucilene D. Santos, Benedito Barraviera, Rui Seabra Ferreira

Abstract

American visceral leishmaniasis is caused by the intracellular parasite Leishmania (L.) infantum chagasi, and transmitted by the sand fly Lutzomyia longipalpis. Since treatment is based on classical chemotherapeutics with significant side effects, the search for new drugs remains the greatest global challenge. Thus, this in vitro study aimed to evaluate the leishmanicidal effect of Crotalus durissus terrificus venom fractions on promastigote and amastigote forms of Leishmania (L.) infantum chagasi. Phospholipase A2 (PLA2) and a pool of peptide fraction (<3 kDa) were purified from Crotalus venom. Furthermore, promastigotes and peritoneal macrophages of mice infected by amastigotes were exposed to serial dilutions of the PLA2 and peptides at intervals varying between 1.5625 μg/mL and 200 μg/mL. Both showed activity against promastigotes that varied according to the tested concentration and the time of incubation (24, 48 and 72 h). MTT assay for promastigotes showed IC50 of 52.07 μg/mL for PLA2 and 16.98 μg/mL for the peptide fraction of the venom. The cytotoxicity assessment in peritoneal macrophages showed IC50 of 98 μg/mL and 16.98 μg/mL for PLA2 and peptide by MTT assay, respectively. In peritoneal macrophages infected by Leishmania (L.) infantum chagasi amastigotes, the PLA2 stimulated growth of parasites, and at higher doses reduced growth by 23 %. The peptide fraction prevented 43 % of the intracellular parasite growth at a dose of 16.98 μg/mL, demonstrating the toxicity of this dose to macrophages. Both fractions stimulated H2O2 production by macrophages but only PLA2 was able to stimulate NO production. We have demonstrated the in vitro leishmanicidal activity of the PLA2 and peptide fraction of Crotalus venom. The results encourage further studies to describe the metabolic pathways involved in cell death, as well as the prospecting of molecules with antiparasitic activity present in the peptide fraction of Crotalus durissus terrificus venom.

Twitter Demographics

The data shown below were collected from the profiles of 3 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 52 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 1 2%
Unknown 51 98%

Demographic breakdown

Readers by professional status Count As %
Student > Master 9 17%
Student > Bachelor 8 15%
Student > Doctoral Student 7 13%
Student > Ph. D. Student 5 10%
Student > Postgraduate 3 6%
Other 10 19%
Unknown 10 19%
Readers by discipline Count As %
Agricultural and Biological Sciences 17 33%
Biochemistry, Genetics and Molecular Biology 12 23%
Medicine and Dentistry 4 8%
Immunology and Microbiology 3 6%
Nursing and Health Professions 2 4%
Other 2 4%
Unknown 12 23%

Attention Score in Context

This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 December 2015.
All research outputs
#1,486,795
of 6,650,505 outputs
Outputs from Journal of Venomous Animals and Toxins including Tropical Diseases
#32
of 230 outputs
Outputs of similar age
#73,950
of 276,537 outputs
Outputs of similar age from Journal of Venomous Animals and Toxins including Tropical Diseases
#3
of 14 outputs
Altmetric has tracked 6,650,505 research outputs across all sources so far. Compared to these this one has done well and is in the 77th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 230 research outputs from this source. They receive a mean Attention Score of 3.0. This one has done well, scoring higher than 85% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 276,537 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 72% of its contemporaries.
We're also able to compare this research output to 14 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 78% of its contemporaries.