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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.)

Antitumor potential of the myotoxin BthTX-I from Bothrops jararacussu snake venom: evaluation of cell cycle alterations and death mechanisms induced in tumor cell lines

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da Silva, Cassio Prinholato [1] ; Costa, Tassia R. [1] ; Paiva, Raquel M. Alves [1] ; Cintra, Adelia C. O. [1] ; Menaldo, Danilo L. [1] ; Antunes, Lusania M. Greggi [1] ; Sampaio, Suely V. [1]
Total Authors: 7
[1] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Dept Clin Analyses Toxicol & Food Sci, BR-14040903 Ribeirao Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Venomous Animals and Toxins including Tropical Diseases; v. 21, NOV 3 2015.
Web of Science Citations: 16

Background: Phospholipases A(2) (PLA(2)s) are abundant components of snake venoms that have been extensively studied due to their pharmacological and pathophysiological effects on living organisms. This study aimed to assess the antitumor potential of BthTX-I, a basic myotoxic PLA(2) isolated from Bothrops jararacussu venom, by evaluating in vitro processes of cytotoxicity, modulation of the cell cycle and induction of apoptosis in human (HL-60 and HepG2) and murine (PC-12 and B16F10) tumor cell lines. Methods: The cytotoxic effects of BthTX-I were evaluated on the tumor cell lines HL-60 (promyelocytic leukemia), HepG2 (human hepatocellular carcinoma), PC-12 (murine pheochromocytoma) and B16F10 (murine melanoma) using the MTT method. Flow cytometry technique was used for the analysis of cell cycle alterations and death mechanisms (apoptosis and/or necrosis) induced in tumor cells after treatment with BthTX-I. Results: It was observed that BthTX-I was cytotoxic to all evaluated tumor cell lines, reducing their viability in 40 to 50 %. The myotoxin showed modulating effects on the cell cycle of PC-12 and B16F10 cells, promoting delay in the G0/G1 phase. Additionally, flow cytometry analysis indicated cell death mainly by apoptosis. B16F10 was more susceptible to the effects of BthTX-I, with similar to 40 % of the cells analyzed in apoptosis, followed by HepG2 (similar to 35 %), PC-12 (similar to 25 %) and HL-60 (similar to 4 %). Conclusions: These results suggest that BthTX-I presents antitumor properties that may be useful for developing new therapeutic strategies against cancer. (AU)

FAPESP's process: 11/23236-4 - Native and recombinant animal toxins: functional, structural and molecular analysis
Grantee:Suely Vilela
Support type: Research Projects - Thematic Grants