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Eur Urol. 2019 Apr;75(4):637-646. doi: 10.1016/j.eururo.2018.12.043. Epub 2019 Jan 15.

The Microbiome and Genitourinary Cancer: A Collaborative Review.

Author information

1
Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA.
2
Department of Urology, Mayo Clinic, Rochester, MN, USA.
3
Division of Urology, Department of Surgery, The University of Western Ontario, London, ON, Canada.
4
Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA; Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
5
Department of Immunology, Institut Pasteur, Paris, France; Inserm U1223, Paris, France.
6
Cancer Research Laboratory Program, Lawson Health Research Institute, London, Ontario, Canada; Division of Experimental Oncology, Department of Oncology, The University of Western Ontario, London, ON, Canada.
7
Department of Medical Oncology & Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA.
8
Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Baltimore, MD, USA; Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. Electronic address: ksfanos@jhmi.edu.

Abstract

CONTEXT:

The recent discovery of the existence of a human genitourinary microbiome has led to the investigation of its role in mediating the pathogenesis of genitourinary malignancies, including bladder, kidney, and prostate cancers. Furthermore, although it is largely recognized that members of the gastrointestinal microbiota are actively involved in drug metabolism, new studies demonstrate additional roles and the potential necessity of the gastrointestinal microbiota in dictating cancer treatment response.

OBJECTIVE:

To summarize the current evidence of a mechanistic role for the genitourinary and gastrointestinal microbiome in genitourinary cancer initiation and treatment response.

EVIDENCE ACQUISITION:

We conducted a literature search up to October 2018. Search terms included microbiome, microbiota, urinary microbiome, bladder cancer, urothelial carcinoma, renal cell carcinoma, kidney cancer, testicular cancer, and prostate cancer.

EVIDENCE SYNTHESIS:

There is preliminary evidence to implicate the members of the genitourinary microbiota as causative factors or cofactors in genitourinary malignancy. Likewise, the current evidence for gastrointestinal microbes in dictating cancer treatment response is mainly correlative; however, we provide examples where therapeutic agents used for the treatment of genitourinary cancers are affected by the human-associated microbiota, or vice versa. Clinical trials, such as fecal microbiota transplant to increase the efficacy of immunotherapy, are currently underway.

CONCLUSIONS:

The role of the microbiome in genitourinary cancer is an emerging field that merits further studies. Translating microbiome research into clinical action will require incorporation of microbiome surveillance into ongoing and future clinical trials as well as expansion of studies to include metagenomic sequencing and metabolomics.

PATIENT SUMMARY:

This review covers recent evidence that microbial populations that reside in the genitourinary tract-and were previously not known to exist-may influence the development of genitourinary malignancies including bladder, kidney, and prostate cancers. Furthermore, microbial populations that exist at sites outside of the genitourinary tract, such as those that reside in our gut, may influence cancer development and/or treatment response.

KEYWORDS:

Bladder cancer; Immunotherapy; Kidney cancer; Microbiome; Prostate cancer

PMID:
30655087
DOI:
10.1016/j.eururo.2018.12.043
[Indexed for MEDLINE]

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