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Bifidobacterium can mitigate intestinal immunopathology in the context of CTLA-4 blockade.


ABSTRACT: Antibodies that attenuate immune tolerance have been used to effectively treat cancer, but they can also trigger severe autoimmunity. To investigate this, we combined anti-CTLA-4 treatment with a standard colitis model to give mice a more severe form of the disease. Pretreatment with an antibiotic, vancomycin, provoked an even more severe, largely fatal form, suggesting that a Gram-positive component of the microbiota had a mitigating effect. We then found that a commonly used probiotic, Bifidobacterium, could largely rescue the mice from immunopathology without an apparent effect on antitumor immunity, and this effect may be dependent on regulatory T cells.

SUBMITTER: Wang F 

PROVIDER: S-EPMC5776803 | biostudies-other | 2018 Jan

REPOSITORIES: biostudies-other

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<i>Bifidobacterium</i> can mitigate intestinal immunopathology in the context of CTLA-4 blockade.

Wang Feng F   Yin Qian Q   Chen Liang L   Davis Mark M MM  

Proceedings of the National Academy of Sciences of the United States of America 20171218 1


Antibodies that attenuate immune tolerance have been used to effectively treat cancer, but they can also trigger severe autoimmunity. To investigate this, we combined anti-CTLA-4 treatment with a standard colitis model to give mice a more severe form of the disease. Pretreatment with an antibiotic, vancomycin, provoked an even more severe, largely fatal form, suggesting that a Gram-positive component of the microbiota had a mitigating effect. We then found that a commonly used probiotic, <i>Bifi  ...[more]

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