Therapy of solid tumors using probiotic Symbioflor-2: restraints and potential.
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Authors
Kocijancic, DinoFelgner, Sebastian
Frahm, Michael
Komoll, Ronja-Melinda
Iljazovic, Aida
Pawar, Vinay
Rohde, M
Heise, Ulrike
Zimmermann, Kurt
Gunzer, Florian
Hammer, Juliane
Crull, Katja
Leschner, Sara
Weiss, Siegfried
Issue Date
2016-04-19
Metadata
Show full item recordAbstract
To date, virulent bacteria remain the basis of most bacteria mediated cancer therapies. For clinical application attenuation is required. However, this might result in a drastically lowered therapeutic capacity. Herein we argue that the E. coli probiotic Symbioflor-2, with a history of safe application may constitute a viable tumor therapeutic candidate. We demonstrate that Symbioflor-2 displays a highly specific tumor targeting ability as determined in murine CT26 and RenCa tumor models. The excellent specificity was ascribed to reduced levels of adverse colonization. A high safety standard was demonstrated in WT and Rag1-/- mice. Thus, Symbioflor-2 may represent an ideal tumor targeting delivery system for therapeutic molecules. Moreover, Symbioflor-2 was capable of inducing CT26 tumor clearance as result of an adjuvant effect on tumor specific CD8+ T cells analogous to the Salmonella variant SL7207. However, lower therapeutic efficacy against RenCa tumors suggested a generally reduced therapeutic potency for probiotics. Interestingly, concurrent depletion of Gr-1+ or Ly6G+ cells installed therapeutic efficacy equal to SL7207, thus highlighting the role of innate effector cells in restraining the anti-tumor effects of Symbioflor-2. Collectively, our findings argue for a strategy of safe strain application and a more sustainable use of bacteria as a delivery system for therapeutic molecules.Citation
Therapy of solid tumors using probiotic Symbioflor-2: restraints and potential. 2016, 7 (16):22605-22 OncotargetAffiliation
Helmholtz Centre for infection research, Inhoffenstr. 7, 38124 Braunschweig, Germany.Journal
OncotargetPubMed ID
26981777Type
ArticleLanguage
enISSN
1949-2553ae974a485f413a2113503eed53cd6c53
10.18632/oncotarget.8027
Scopus Count
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-sa/4.0/
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