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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pep5, a Fragment of Cyclin D2, Shows Antiparasitic Effects in Different Stages of the Trypanosoma cruzi Life Cycle and Blocks Parasite Infectivity

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de Araujo, Christiane Bezerra [1, 2] ; de Lima, Loyze Paola [1, 2] ; Calderano, Simone Guedes [3] ; Damasceno, Flavia Silva [4] ; Silber, Ariel M. [4] ; Elias, Maria Carolina [1, 2]
Total Authors: 6
[1] Inst Butantan, Lab Especial Ciclo Celular, Sao Paulo - Brazil
[2] Inst Butantan, Ctr Toxins Immune Response & Cell Signaling CeTIC, Sao Paulo - Brazil
[3] Inst Butantan, Lab Parasitol, Sao Paulo - Brazil
[4] Inst Ciencias Biomed, Dept Parasitol, Lab Biochem Tryps LaBTryps, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Antimicrobial Agents and Chemotherapy; v. 63, n. 5 MAY 2019.
Web of Science Citations: 2

Pep5 (WELVVLGKL) is a fragment of cyclin D2 that exhibits a 2-fold increase in the S phase of the HeLa cell cycle. When covalently bound to a cell-penetrating peptide (Pep5-cpp), the nonapeptide induces cell death in several tumor cells, including breast cancer and melanoma cells. Additionally, Pep5-cpp reduces the in vivo tumor volume of rat glioblastoma. Chagas disease, which is caused by the flagellated parasite Trypanosoma cruzi, is a neglected disease that occurs mainly in the Americas, where it is considered an important public health issue. Given that there are only two options for treating the disease, it is exceptionally crucial to search for new molecules with potential pharmacological action against the parasites. In this study, we demonstrate that Pep5-cpp induces cell death in epimastigote, trypomastigote, and amastigote forms of T. cruzi. The Pep5-cpp peptide was also able to decrease the percentage of infected cells without causing any detectable toxic effects in mammalian host cells. The infective, i.e., trypomastigote form of T. cruzi pretreated with Pep5-cpp was unable to infect LLC-MK2 monkey kidney cells. Also, Pep5-binding proteins were identified by mass spectrometry, including calmodulin-ubiquitin-associated protein, which is related to the virulence and parasitemia of T. cruzi. Taken together, these data suggest that Pep5 can be used as a novel alternative for the treatment of Chagas disease. (AU)

FAPESP's process: 17/16553-0 - The role of the mitochondrial and glycosomal isoforms of fumarate reductase of Trypanosoma Cruzi
Grantee:Ariel Mariano Silber
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 16/06034-2 - The biological role of amino acids and their metabolites in Trypanosoma cruzi
Grantee:Ariel Mariano Silber
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/13375-5 - Replication origins in trypanosomes
Grantee:Christiane Bezerra de Araujo
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07467-1 - CeTICS - Center of Toxins, Immune-Response and Cell Signaling
Grantee:Hugo Aguirre Armelin
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/50050-2 - How do common and diverged features of the replicative stress response shape the biology of TriTryp parasites?
Grantee:Maria Carolina Quartim Barbosa Elias Sabbaga
Support type: Research Projects - Thematic Grants