Validation of an artificial intelligence algorithm applied to a metabolic substrate analysis of urine for detection of urothelial cancer.

Authors

null

Nikola Kaludov

Abilis Life Sciences Inc., Potomac, MD

Nikola Kaludov , Mohummad Minhaj Siddiqui , Max Kates , Hemantkumar Tripathi , Amatul Nasir Salma , Yair Lotan , Gary D. Steinberg

Organizations

Abilis Life Sciences Inc., Potomac, MD, University of Maryland School of Medicine, Division of Urology, Baltimore, MD, The James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, University of Maryland Medical Center, Baltimore, MD, University of Maryland Medical School, Baltimore, MD, The University of Texas Southwestern Medical Center, Dallas, TX, Department of Surgery, The University of Chicago Medicine, Chicago, IL

Research Funding

Other Government Agency
Pharmaceutical/Biotech Company

Background: Urine tests such as urine cytology are commonly used for the diagnosis and monitoring of urothelial cancer. These tests are often limited by issues related to sensitivity or specificity. It is well known that derangement of cellular metabolism is one of the hallmarks of carcinogenesis. As urothelial cancer is in constant contact with urine, we hypothesize that metabolite composition in the urine may provide insight into possible urothelial cancer presence in the urinary tract. In this study, we evaluated a metabolomics based urine test for the detection of urothelial cancer. Methods: In this prospective, multi-institutional IRB approved study, urine samples were collected from a total of 57 urothelial cancer patients and non-urothelial cancer controls. Gas chromatography profiles of urine small molecule metabolites were generated to yield over 2400 data points of metabolite peaks and troughs for every urine sample. A machine-learning based algorithm (Abilis Life Sciences) was constructed to predict urothelial cancer versus non-cancer controls through analysis of peaks and trough patterns of urine metabolomics profiles. Predictions were made in a blinded fashion and descriptive statistics of test sensitivity and specificity were generated. Results: The urine metabolite composition of 57 patients were analyzed and urothelial cancer predictions were generated. The test demonstrated an overall accuracy of 89.5% (51 out of 57 cases correctly predicted). The sensitivity of the test was 97.1% (34 out of 35) and specificity was 77.3% (17 out of 22). The Positive Predictive Value is 87.2%, while the Negative Predictive Value is 94.4%. The area under the curve for the receiver operating characteristic curve was 0.87. Conclusions: Urine based metabolic profile analysis using artificial intelligence algorithms is a promising potential diagnostic test for detection of urothelial cancer. Further testing is ongoing to increase robustness of the validation.

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Abstract Details

Meeting

2019 ASCO Annual Meeting

Session Type

Publication Only

Session Title

Genitourinary (Nonprostate) Cancer: Publication Only

Track

Genitourinary Cancer—Kidney and Bladder

Sub Track

Bladder Cancer

Citation

J Clin Oncol 37, 2019 (suppl; abstr e16008)

DOI

10.1200/JCO.2019.37.15_suppl.e16008

Abstract #

e16008

Abstract Disclosures

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