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CC BY-NC-ND 4.0 · Revista Urología Colombiana / Colombian Urology Journal 2022; 31(02): e73-e81
DOI: 10.1055/s-0042-1744253
Original Article | Artículo Original
Urology Oncology - Prostate Cancer / Urología Oncológica - Cáncer de Próstata

Metabolomic Profile in Patients with Malignant Disturbances of the Prostate: An Experimental Approach

Perfil metabolómico en pacientes con alteraciones malignas de la próstata: Un enfoque experimental
Herney Andrés García-Perdomo 
1   Division of Urology/Uro-oncology, Department of Surgery, UROGIV Research Group, School of Medicine, Universidad del Valle, Cali, Colombia
,
Leidy Vanessa Mena Ramirez 
2   Department of Chemistry, Faculty of Natural and Exact Sciences, Universidad del Valle, Cali, Colombia
,
Julien Wist 
3   Department of Chemistry, Faculty of Natural and Exact Sciences, DARMN Research Group, Universidad del Valle, Cali, Colombia
,
Adalberto Sanchez 
4   Department of Physiological Sciences, LABIOMOL Research Group, School of Basic Sciences, Universidad del Valle, Cali, Colombia
› Author Affiliations Funding This work was supported by the Colombian Ministry of Science, Technology and Innovation RC. No. 873-2019 Project code: 1106-844-67709
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Abstract

Purpose To identify metabolites in humans that can be associated with the presence of malignant disturbances of the prostate.

Methods In the present study, we selected male patients aged between 46 and 82 years who were considered at risk of prostate cancer due to elevated levels of prostate-specific antigen (PSA) or abnormal results on the digital rectal examination. All selected patients came from two university hospitals (Hospital Universitario del Valle and Clínica Rafael Uribe Uribe) and were divided into 2 groups: cancer (12 patients) and non-cancer (20 patients). Cancer was confirmed by histology, and none of the patients underwent any previous treatment. Standard protocols were applied to all the collected blood samples. The resulting plasma samples were kept at -80°C, and a profile of each one was acquired by nuclear magnetic resonance (NMR) using established experiments. Multivariate analyses were applied to this dataset, first to establish the quality of the data and identify outliers, and then, to model the data.

Results We included 12 patients with cancer and 20 without it. Two patients were excluded due to contamination with ethanol. The remaining ones were used to build an Orthogonal Projections to Latent Structures Discriminant Analysis (OPLS-DA) model (including 15 non-cancer and 10 cancer patients), with acceptable discrimination (Q2 = 0.33). This model highlighted the role of lactate and lipids, with a positive association of these two metabolites and prostate cancer.

Conclusions The primary discriminative metabolites between patients with and without prostate cancer were lactate and lipids. These might be the most reliable biomarkers to trace the development of cancer in the prostate.

Resumen

Objetivo Identificar metabolitos en humanos que pueden estar asociados con la presencia de alteraciones malignas de la próstata.

Métodos Se incluyeron muestras de pacientes masculinos entre 46 y 82 años y que se consideraron en riesgo de cáncer de próstata debido a la elevación del antígeno prostático específico (PSA) o el examen rectal anormal. Todos los pacientes seleccionados procedían de dos hospitales universitarios (Hospital Universitario del Valle y Clínica Rafael Uribe Uribe) y se dividieron en dos grupos: Oncológicos (12) vs no oncológicos (20). El cáncer fue confirmado por histología, y ninguno de ellos recibió tratamiento previo. Se aplicaron protocolos estándar a todas las muestras de sangre recolectadas. Las muestras de plasma resultantes se mantuvieron a −80°C y se adquirió un perfil de cada muestra mediante RMN. Se aplicaron análisis multivariantes a este conjunto de datos, primero para establecer la calidad de los datos e identificar valores atípicos, y para modelar los datos.

Resultados Se incluyeron 12 pacientes con cáncer y 20 pacientes sin cáncer. Dos pacientes fueron excluidos por contaminación con etanol. Los restantes se utilizaron para construir un modelo OPLS-DA (15 pacientes no oncológicos y diez oncológicos), con una discriminación aceptable (Q2 = 0,33). Este modelo destacó el papel del lactato y los lípidos, encontrando una asociación positiva entre estos dos metabolitos y el cáncer de próstata.

Conclusiones Los principales metabolitos discriminativos entre pacientes con cáncer de próstata versus no cáncer fueron el lactato y los lípidos. Estos podrían ser los biomarcadores más confiables para rastrear el desarrollo del cáncer en la próstata.

Keywords

prostate neoplasm - metabolomics - prostate cancer - lactate - nuclear magnetic resonance

Palabras clave

neoplasia de la próstata - metabolómica - cáncer de próstata - lactato - resonancia magnética


Publication History

Received: 09 September 2021

Accepted: 20 January 2022

Article published online:
21 June 2022

© 2022. Sociedad Colombiana de Urología. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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