Red propolis and L-lysine on angiogenesis and tumor growth in a new model of hamster cheek pouch inoculated with Walker 256 tumor cells

ABSTRACT Objective: To evaluate the effect of red propolis and L-lysine on angiogenesis and tumor growth in a new model of hamster cheek pouch inoculated with Walker 256 tumor cells. Methods: The study consisted of two experiments with four groups each (total: 57 hamsters). In the experiment 1, the animals were inoculated with Walker tumor cells, followed by administration of test substances (red propolis 200mg/5mL/kg or L-lysine 150mg/kg) or control substances (gum arabic 5mL/kg or water 5mL/kg) for 10 days. The animals in the experiment 2 received red propolis, L-lysine, gum arabic or water at the same doses, for 33 days prior to inoculation of Walker tumor cells, followed by 10 days of treatment with the same substances. Based on single-plane images, angiogenesis was quantified (mean vascular area), in percentage, and tumor area (mm2) and perimeter (mm). Results: In the experiment 1, compared to animals receiving water, the mean vascular area expressed in percentage was significantly smaller in animal treated with propolis (p<0.05) and L-lysine (p<0.001). Conclusion: Both red propolis and L-lysine inhibited tumor angiogenesis in the new hamster cheek pouch model when administered after tumor inoculation.

Bibliographic Details

Main Authors:	Juanes,Camila de Carvalho, Souza,Susana Moreira de, Braga,Vanessa Nogueira Lages, Barreto,Francisco Stefânio, Aguiar,Gisele Rocha, Pimentel,Kleison Douglas Gomes, Fechine,Francisco Vagnaldo, Dornelas,Conceição Aparecida
Format:	Digital revista
Language:	English
Published:	Instituto Israelita de Ensino e Pesquisa Albert Einstein 2019
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-45082019000200211
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