Genomics

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Gut microbiome modulates response to anti PD1 immunotherapy in metastatic melanoma patients


ABSTRACT: There is a growing appreciation of the role of the microbiome in cancer, and evidence in pre-clinical models that the gut microbiome may modulate responses to immune checkpoint blockade though this has not been well-characterized in patients. We analyzed the oral (n=86)and gut (n=43) 16S microbiome in melanoma patients on PD-1 blockade. Significant differences were noted in the diversity and composition of the gut microbiome between responders and non-responders in patients with a fecal microbiome sample, with significantly higher alpha diversity and relative abundance of Ruminococcaceae bacteria) in R. Metagenomic studies (n=25) revealed functional differences in gut bacteria in R including enrichment of anabolic pathways. Immune profiling demonstrated enhanced systemic and anti-tumor immunity in patients with a favorable gut microbiome as well as in germ-free mice receiving fecal transplant from responding patients. Together, these data have important implications for treatment with immune checkpoint blockade in cancer.

PROVIDER: EGAS00001002698 | EGA |

REPOSITORIES: EGA

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Gut microbiome modulates response to anti-PD-1 immunotherapy in melanoma patients.

Gopalakrishnan V V   Spencer C N CN   Nezi L L   Reuben A A   Andrews M C MC   Karpinets T V TV   Prieto P A PA   Vicente D D   Hoffman K K   Wei S C SC   Cogdill A P AP   Zhao L L   Hudgens C W CW   Hutchinson D S DS   Manzo T T   Petaccia de Macedo M M   Cotechini T T   Kumar T T   Chen W S WS   Reddy S M SM   Szczepaniak Sloane R R   Galloway-Pena J J   Jiang H H   Chen P L PL   Shpall E J EJ   Rezvani K K   Alousi A M AM   Chemaly R F RF   Shelburne S S   Vence L M LM   Okhuysen P C PC   Jensen V B VB   Swennes A G AG   McAllister F F   Marcelo Riquelme Sanchez E E   Zhang Y Y   Le Chatelier E E   Zitvogel L L   Pons N N   Austin-Breneman J L JL   Haydu L E LE   Burton E M EM   Gardner J M JM   Sirmans E E   Hu J J   Lazar A J AJ   Tsujikawa T T   Diab A A   Tawbi H H   Glitza I C IC   Hwu W J WJ   Patel S P SP   Woodman S E SE   Amaria R N RN   Davies M A MA   Gershenwald J E JE   Hwu P P   Lee J E JE   Zhang J J   Coussens L M LM   Cooper Z A ZA   Futreal P A PA   Daniel C R CR   Ajami N J NJ   Petrosino J F JF   Tetzlaff M T MT   Sharma P P   Allison J P JP   Jenq R R RR   Wargo J A JA  

Science (New York, N.Y.) 20171102 6371


Preclinical mouse models suggest that the gut microbiome modulates tumor response to checkpoint blockade immunotherapy; however, this has not been well-characterized in human cancer patients. Here we examined the oral and gut microbiome of melanoma patients undergoing anti-programmed cell death 1 protein (PD-1) immunotherapy (<i>n</i> = 112). Significant differences were observed in the diversity and composition of the patient gut microbiome of responders versus nonresponders. Analysis of patien  ...[more]

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