Oncotarget

Research Papers:

Metabolic reprogramming: a new relevant pathway in adult adrenocortical tumors

Céline Pinheiro _, Sara Granja, Adhemar Longatto-Filho, André M. Faria, Maria C. B. V. Fragoso, Silvana M. Lovisolo, Antonio M. Lerário, Madson Q. Almeida, Fátima Baltazar and Mariateresa C. N. Zerbini

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Oncotarget. 2015; 6:44403-44421. https://doi.org/10.18632/oncotarget.5623

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Abstract

Céline Pinheiro1,2,3,4,*, Sara Granja1,2,*, Adhemar Longatto-Filho1,2,4,5, André M. Faria6, Maria C. B. V. Fragoso6,7, Silvana M. Lovisolo8, Antonio M. Lerário7, Madson Q. Almeida6,7, Fátima Baltazar1,2,*, Maria C. N. Zerbini9,*

1Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal

2ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal

3Barretos School of Health Sciences Dr. Paulo Prata – FACISB, Barretos, Sao Paulo, Brazil

4Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Sao Paulo, Brazil

5Laboratory of Medical Investigation (LIM-14), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

6Unidade de Suprarrenal, Disciplina de Endocrinologia e Metabologia, Laboratório de Hormônios e Genética Molecular LIM42, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

7Instituto do Câncer do Estado de São Paulo - ICESP, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

8Hospital Universitário, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

9Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil

*These authors have contributed equally to this work

Correspondence to:

Céline Pinheiro, e-mail: celinepinheiro@gmail.com

Keywords: adrenocortical tumors, metabolic reprogramming, monocarboxylate transporter, Warburg effect

Received: May 09, 2015     Accepted: November 06, 2015     Published: November 16, 2015

ABSTRACT

Adrenocortical carcinomas (ACCs) are complex neoplasias that may present unexpected clinical behavior, being imperative to identify new biological markers that can predict patient prognosis and provide new therapeutic options. The main aim of the present study was to evaluate the prognostic value of metabolism-related key proteins in adrenocortical carcinoma. The immunohistochemical expression of MCT1, MCT2, MCT4, CD147, CD44, GLUT1 and CAIX was evaluated in a series of 154 adult patients with adrenocortical neoplasia and associated with patients’ clinicopathological parameters. A significant increase in was found for membranous expression of MCT4, GLUT1 and CAIX in carcinomas, when compared to adenomas. Importantly MCT1, GLUT1 and CAIX expressions were significantly associated with poor prognostic variables, including high nuclear grade, high mitotic index, advanced tumor staging, presence of metastasis, as well as shorter overall and disease free survival. In opposition, MCT2 membranous expression was associated with favorable prognostic parameters. Importantly, cytoplasmic expression of CD147 was identified as an independent predictor of longer overall survival and cytoplasmic expression of CAIX as an independent predictor of longer disease-free survival. We provide evidence for a metabolic reprogramming in adrenocortical malignant tumors towards the hyperglycolytic and acid-resistant phenotype, which was associated with poor prognosis.


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