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Ortiz Valdez E, Rangel-Escareño C, Matus Santos JA, Vázquez Romo R, Guijosa A, Villarreal-Garza C, Arrieta O, Rodríguez-Bautista R, Caro-Sánchez CH, Ortega Gómez A. Characterization of triple negative breast cancer gene expression profiles in Mexican patients. Mol Clin Oncol 2022; 18:5. [PMID: 36605097 PMCID: PMC9808158 DOI: 10.3892/mco.2022.2601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 10/05/2022] [Indexed: 12/23/2022] Open
Abstract
Triple negative breast cancer (TNBC) is an aggressive type of cancer that accounts for ~23% of breast tumors in Mexico. In an attempt to understand in an improved way the behavior of TNBC, throughout the years, gene expression in these tumors has been studied. Lehman et al identified 6 subtypes of gene expression in TNBC with distinct characteristics. In the present study, it was aimed to assess clinical, pathological and prognostic characteristics of TNBC in a Mexican-based cohort. A total of 55 patients diagnosed with TNBC at Mexico's National Institute of Cancer (INCan) were included. Tumor needle biopsy samples were obtained and subjected to microarray analysis. Patients were thus classified into one of the 6 TNBC molecular subtypes. The prognostic, clinical and pathological information of patients was obtained, and differences across molecular subtypes were sought. Out of the 55 included patients, the following subtypes were identified: 9 basal-like-1, 11 basal-like-2 (BSL2), 16 immunomodulatory (IM), 12 mesenchymal, 6 androgen receptor-like and 1 mesenchymal stem-like. Mean follow-up time was 47.1 months. The IM molecular subtype had the best overall survival (OS) (median OS was not reached). BSL2 had the worst OS (15 months). A complete pathologic response to neoadjuvant chemotherapy was obtained more often in the IM subtype (P=0.032). No significant associations were found between any of the clinical or pathological characteristics and the TNBC molecular subtypes. The results obtained from the present study should be considered when seeking to implement a clinical-molecular model for TNBC patient care, particularly in Hispanic-based populations, as they have been frequently underrepresented in clinical studies assessing TNBC molecular subtypes.
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Affiliation(s)
- Eric Ortiz Valdez
- Breast Tumors Department, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Claudia Rangel-Escareño
- Computational Genomics Department, Instituto Nacional de Medicina Genómica, Arenal Tepepan, Tlalpan, Mexico City 14610, Mexico
| | - Juan Antonio Matus Santos
- Breast Tumors Department, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Rafael Vázquez Romo
- Breast Tumors Department, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Alberto Guijosa
- School of Medicine, Universidad Panamericana, Benito Juárez, Mexico City 03920, Mexico
| | - Cynthia Villarreal-Garza
- Breast Cancer Center, Hospital Zambrano Hellion TecSalud, Tecnológico de Monterrey, Real San Agustín, San Pedro Garza García, Nuevo León 66278, Mexico
| | - Oscar Arrieta
- Thoracic Oncology Unit, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Rubén Rodríguez-Bautista
- Thoracic Oncology Unit, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Claudia H. Caro-Sánchez
- Pathology Department, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico
| | - Alette Ortega Gómez
- Laboratory of Translational Medicine, Mexico's National Institute of Cancer, Sección XVI, Tlalpan, Mexico City 14080, Mexico,Correspondence to: Dr Alette Ortega Gómez, Laboratory of Translational Medicine, Mexico's National Institute of Cancer, 22 San Fernando Avenue, Sección XVI, Tlalpan, Mexico City 14080, Mexico
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