Abstract
Polysaccharides are substances that modify the biological response to several stressors. The present study investigated the antitumor activity of the soluble fraction of polysaccharides (SFP), extracted from cabernet franc red wine, in Walker-256 tumor-bearing rats. The monosaccharide composition had a complex mixture, suggesting the presence of arabinoglactans, mannans, and pectins. Treatment with SFP (30 and 60 mg/kg, oral) for 14 days significantly reduced the tumor weight and volume compared with controls. Treatment with 60 mg/kg SFP reduced blood monocytes and neutrophils, reduced the tumor activity of N-acetylglucosaminidase, myeloperoxidase, and nitric oxide, increased blood lymphocytes, and increased the levels of tumor necrosis factor α (TNF-α) in tumor tissue. Treatment with SFP also induced the expression of the cell necroptosis-related genes Rip1 and Rip3. The antineoplastic effect of SFP appears to be attributable to its action on the immune system by controlling the tumor microenvironment and stimulating TNF-α production, which may trigger the necroptosis pathway.
Original language | English |
---|---|
Pages (from-to) | 123-133 |
Number of pages | 11 |
Journal | Carbohydrate Polymers |
Volume | 160 |
DOIs | |
Publication status | Published - Mar 15 2017 |
Externally published | Yes |
Bibliographical note
Funding Information:The authors would like to thank the Brazilian funding agencies CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) for financial support, and Eliana Rezende Adami, Jonathan Paulo Agnes, Flavia Caroline Collere, Thaissa Backes dos Santos, Caroline M. Kopruszinski and Renata Cristine dos Reis for the inestimable help in the experiments. We also thank the UFPR Electron Microscopy Center – CME/UFPR, Multi-User Center Confocal Microscopy of UFPR, and UFPR NMR Center.
Publisher Copyright:
© 2016 Elsevier Ltd
ASJC Scopus Subject Areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry