Save

Anti-genotoxic and anti-mutagenic activity of Escherichia coli Nissle 1917 as assessed by in vitro tests

In: Beneficial Microbes
Authors:
D. Janosch Ardeypharm GmbH, Loerfeldstraβe 20, 58313 Herdecke, Germany.

Search for other papers by D. Janosch in
Current site
Google Scholar
PubMed
Close
,
S. Dubbert Ardeypharm GmbH, Loerfeldstraβe 20, 58313 Herdecke, Germany.

Search for other papers by S. Dubbert in
Current site
Google Scholar
PubMed
Close
,
K. Eiteljörge Ardeypharm GmbH, Loerfeldstraβe 20, 58313 Herdecke, Germany.

Search for other papers by K. Eiteljörge in
Current site
Google Scholar
PubMed
Close
,
B.W.K. Diehl Spectral Service AG, Emil-Hoffmann-Straβe 33, 50996 Köln, Germany.

Search for other papers by B.W.K. Diehl in
Current site
Google Scholar
PubMed
Close
,
U. Sonnenborn Ardeypharm GmbH, Loerfeldstraβe 20, 58313 Herdecke, Germany.

Search for other papers by U. Sonnenborn in
Current site
Google Scholar
PubMed
Close
,
L.V. Passchier Molecular Microbiology and Genomics Consultants, Tannenstraβe 7, 55576 Zotzenheim, Germany.

Search for other papers by L.V. Passchier in
Current site
Google Scholar
PubMed
Close
,
T.M. Wassenaar Molecular Microbiology and Genomics Consultants, Tannenstraβe 7, 55576 Zotzenheim, Germany.

Search for other papers by T.M. Wassenaar in
Current site
Google Scholar
PubMed
Close
, and
R. von Bünau Ardeypharm GmbH, Loerfeldstraβe 20, 58313 Herdecke, Germany.

Search for other papers by R. von Bünau in
Current site
Google Scholar
PubMed
Close

Anti-genotoxic or anti-mutagenic activity has been described for a number of Gram-positive probiotic bacterial species. Here we present evidence that Gram-negative Escherichia coli Nissle 1917 (EcN) also displays anti-genotoxic/anti-mutagenic activity, as assessed in vitro by the Comet Assay and the Ames Test, respectively. This activity was demonstrated by use of the mutagens 4-nitroquinoline-1-oxide (NQO), hydrogen peroxide (H2O2) and benzo(a) pyrene (B[a]P). For both assays and all three test agents the anti-genotoxic/anti-mutagenic activity of EcN was shown to be concentration dependent. By the use of extracts of bacteria that were inactivated by various procedures (heat treatment, ultrasound sonication or ultraviolet light irradiation), mechanistic explanations could be put forward. The proposed mechanisms were enforced by treating the bacterial material with proteinase K prior to testing. The mutagen H2O2 is most likely inactivated by enzymic activity, with catalase a likely candidate, while several explanations can be put forward for inactivation of B[a]P. NQO is most likely inactivated by metabolising enzymes, since the formation of the metabolite 4-aminoquinoline could be demonstrated. In conclusion, the in vitro results presented here make a strong case for antimutagenic properties of EcN.

Content Metrics

All Time Past 365 days Past 30 Days
Abstract Views 0 0 0
Full Text Views 310 143 14
PDF Views & Downloads 199 85 6