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Original Paper

Immunomodulatory Effects of Lactobacillus and Bifidobacterium on Both Murine and Human Mitogen-Activated T Cells

Li C.-Y.a · Lin H.-C.b, c · Lai C.-H.d · Lu J.J.-Y.e · Wu S.-F.b · Fang S.-H.f

Author affiliations

aDivision of Infectious Diseases, National Health Research Institutes, Miaoli, bDepartment of Pediatrics, China Medical University Hospital, cSchool of Chinese Medicine, dDepartment of Microbiology, School of Medicine, China Medical University, eDepartment of Nursing Education, National Taichung Nursing College, and fInstitute of Athletics, National Taiwan College of Physical Education, Taichung, Taiwan, ROC

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Int Arch Allergy Immunol 2011;156:128–136

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 25, 2010
Accepted: October 22, 2010
Published online: May 16, 2011
Issue release date: September 2011

Number of Print Pages: 9
Number of Figures: 3
Number of Tables: 2

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA

Abstract

Background: Beneficial effects of probiotics have been reported for patients with allergic diseases and intestinal disorders. There is increasing interest in studying the role of different strains or combined probiotic administration on immunoregulation. In this study, we investigated whether probiotics modulate the immune response through regulating T cell proliferation and differentiation. Methods: We examined the effect of probiotic I (a combination of Lactobacillus acidophilus and Bifidobacterium bifidus) and probiotic II (a combination of L. acidophilus and B. infantis) on cell survival and proliferation, the progression of the cell cycle, and the production of Th1/Th2 cytokines by mitogen-stimulated murine spleen cells and human peripheral blood mononuclear cells (PBMCs). Results: Our experimental results showed that high concentrations (≧1 × 106 CFU/ml) of probiotic I or II inhibited mitogen-induced cell proliferation and arrested the cell cycle at the G0/G1 stage in both mitogen-stimulated spleen cells and PBMCs. In the results of low concentrations (<1 × 106 CFU/ml), probiotic I or II enhanced the production of IFN-γ but inhibited the production of IL-4. Our results indicated that high concentrations of probiotic I or II treatment could attenuate mitogen-induced overactive immune responses. On the other hand, low concentrations of probiotic I or II treatment could promote a shift in the Th1/Th2 balance toward Th1-skewed immunity. Conclusion: Dose selection is an important issue for probiotic studies. Our results indicated that probiotics have beneficial effects on regulating T cell-mediated immune responses by attenuating mitogen-induced overactive immune responses and promoting Th1 immune responses.

© 2011 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 25, 2010
Accepted: October 22, 2010
Published online: May 16, 2011
Issue release date: September 2011

Number of Print Pages: 9
Number of Figures: 3
Number of Tables: 2

ISSN: 1018-2438 (Print)
eISSN: 1423-0097 (Online)

For additional information: http://www.karger.com/IAA


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Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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