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Safety and tolerance of Bacteroides xylanisolvens DSM 23964 in healthy adults
in Beneficial Microbesphilippe.ulsemer@glycotope.com
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Abstract
We recently presented the strain Bacteroides xylanisolvens DSM 23964 to be safe for use in food. In order to confirm the tolerance of healthy humans to a regular oral intake of the strain B. xylanisolvens DSM 23964, we here report on the safety data of two successive human studies: a randomised and double-blind parallel group-controlled pilot study with 41 volunteers receiving a daily dose of a pasteurised fermented milk product containing up to 8.5×1011B. xylanisolvens DSM 23964 cells for 3 weeks, and a randomised and placebo-controlled double-blind major study with 140 volunteers receiving the same product but spray-dried and containing up to 1012 cells for 6 weeks. In both studies no persistent side effects of any kind were reported. The measured haematological parameters, and the serum concentrations of immunoglobulin and of inflammatory markers (IL-6, CRP, IFN-γ) were unaffected by the supplementation in both studies. A small decrease in the phagocytic activity of granulocytes and a small increase of TNF-α detected in the pilot study were both invalidated by the major study. This study further revealed that the supplementation induced no modification in natural killer cell activity and in liver enzyme values (gamma-glutamyl-transferase, glutamate-oxalacetate transaminase, glutamate-pyruvate transaminase). Our results definitively demonstrate that the pasteurised B. xylanisolvens DSM 23964 strain is safe and well tolerated by healthy human individuals.
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Ulsemer, P., Toutounian, K., Schmidt, J., Karsten, U. and Goletz, S., 2011. Safety assessment of the commensal strain Bacteroides xylanisolvens DSM 23964. Regulatory Toxicology and Pharmacology, in press. DOI: http://dx.doi.org/doi:10.1016/j.yrtph.2011.10.014.
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Ulsemer, P., Toutounian, K., Schmidt, J., Leuschner, J., Karsten, U. and Goletz, S., 2012. Preliminary safety evaluation of a new Bacteroides xylanisolvens strain. Applied and Environmental Microbiology 78: 528-535.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 22 | 0 | 0 |
| Gesamttextansichten | 678 | 200 | 21 |
| PDF-Downloads | 375 | 137 | 0 |
Safety and tolerance of Bacteroides xylanisolvens DSM 23964 in healthy adults
in Beneficial Microbesphilippe.ulsemer@glycotope.com
Search for other papers by P. Ulsemer in
Current site
Google Scholar
PubMed
Search for other papers by K. Toutounian in
Current site
Google Scholar
PubMed
Search for other papers by G. Kressel in
Current site
Google Scholar
PubMed
Search for other papers by J. Schmidt in
Current site
Google Scholar
PubMed
Search for other papers by U. Karsten in
Current site
Google Scholar
PubMed
Search for other papers by A. Hahn in
Current site
Google Scholar
PubMed
Search for other papers by S. Goletz in
Current site
Google Scholar
PubMed
Abstract
We recently presented the strain Bacteroides xylanisolvens DSM 23964 to be safe for use in food. In order to confirm the tolerance of healthy humans to a regular oral intake of the strain B. xylanisolvens DSM 23964, we here report on the safety data of two successive human studies: a randomised and double-blind parallel group-controlled pilot study with 41 volunteers receiving a daily dose of a pasteurised fermented milk product containing up to 8.5×1011B. xylanisolvens DSM 23964 cells for 3 weeks, and a randomised and placebo-controlled double-blind major study with 140 volunteers receiving the same product but spray-dried and containing up to 1012 cells for 6 weeks. In both studies no persistent side effects of any kind were reported. The measured haematological parameters, and the serum concentrations of immunoglobulin and of inflammatory markers (IL-6, CRP, IFN-γ) were unaffected by the supplementation in both studies. A small decrease in the phagocytic activity of granulocytes and a small increase of TNF-α detected in the pilot study were both invalidated by the major study. This study further revealed that the supplementation induced no modification in natural killer cell activity and in liver enzyme values (gamma-glutamyl-transferase, glutamate-oxalacetate transaminase, glutamate-pyruvate transaminase). Our results definitively demonstrate that the pasteurised B. xylanisolvens DSM 23964 strain is safe and well tolerated by healthy human individuals.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 22 | 0 | 0 |
| Gesamttextansichten | 678 | 200 | 21 |
| PDF-Downloads | 375 | 137 | 0 |
