Genomic and phenotypic profiles of two Brazilian breast cancer cell lines derived from primary human tumors

Corrêa,Natássia C.R.; Kuasne,Hellen; Faria,Jerusa A.Q.A.; Seixas,Ciça C.S.; Santos,Iria G.D.; Abreu,Francine B.; Nonogaki,Suely; Rocha,Rafael M.; Aparecida Borges Silva,Gerluza; Gobbi,Helenice; Rogatto,Silvia R.; Goes,Alfredo M.; Gomes,Dawidson A.

doi:10.3892/or.2013.2284

Genomic and phenotypic profiles of two Brazilian breast cancer cell lines derived from primary human tumors

Authors:
- Natássia C.R. Corrêa
- Hellen Kuasne
- Jerusa A.Q.A. Faria
- Ciça C.S. Seixas
- Iria G.D. Santos
- Francine B. Abreu
- Suely Nonogaki
- Rafael M. Rocha
- Gerluza Aparecida Borges Silva
- Helenice Gobbi
- Silvia R. Rogatto
- Alfredo M. Goes
- Dawidson A. Gomes
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Affiliations: Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil, Department of Biological Sciences, State University of Londrina, Londrina, Brazil, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Brazil, NeoGene Laboratory, CIPE, Brazil, Department of Anatomic Pathology, A.C. Camargo Hospital, São Paulo, Brazil, Department of Anatomic Pathology, A.C. Camargo Hospital, São Paulo, Brazil, Department of Anatomic Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil
Published online on: February 12, 2013 https://doi.org/10.3892/or.2013.2284
Pages: 1299-1307
Copyright: © Corrêa et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Breast cancer is the most common type of cancer among women worldwide. Research using breast cancer cell lines derived from primary tumors may provide valuable additional knowledge regarding this type of cancer. Therefore, the aim of this study was to investigate the phenotypic profiles of MACL-1 and MGSO-3, the only Brazilian breast cancer cell lines available for comparative studies. We evaluated the presence of hormone receptors, proliferation, differentiation and stem cell markers, using immunohistochemical staining of the primary tumor, cultured cells and xenografts implanted in immunodeficient mice. We also investigated the ability of the cell lines to form colonies and copy number alterations by array comparative genomic hybridization. Histopathological analysis showed that the invasive primary tumor from which the MACL-1 cell line was derived, was a luminal A subtype carcinoma, while the ductal carcinoma in situ (DCIS) that gave rise to the MGSO-3 cell line was a HER2 subtype tumor, both showing different proliferation levels. The cell lines and the tumor xenografts in mice preserved their high proliferative potential, but did not maintain the expression of the other markers assessed. This shift in expression may be due to the selection of an ‘establishment’ phenotype in vitro. Whole-genome DNA evaluation showed a large amount of copy number alterations (CNAs) in the two cell lines. These findings render MACL-1 and MGSO-3 the first characterized Brazilian breast cancer cell lines to be potentially used for comparative research.

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