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Molina-Romero, Camilo; Rangel-Escareño, Claudia; Ortega-Gómez, Alette; Alanis-Funes, Gerardo J.; Avilés-Salas, Alejandro; Avila-Moreno, Federico; Mercado, Gabriela E.; Cardona, Andrés F.; Hidalgo-Miranda, Alfredo; Arrieta, Oscar
Human pathology, August 2017, 2017-08-00, 20170801, Volume: 66Journal Article
The current lung cancer classification from the Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society has considerably changed the pathologic diagnosis of lung invasive adenocarcinoma, identifying disease subtypes with substantial implications for medical practice, such as clinical, radiological, molecular, and prognostic differences. We analyzed the differences in the genetic expression of adenocarcinoma subtypes according to the new classification. Microarray gene expression analysis was performed on a cohort of 29 adenocarcinoma patients treated at the Instituto Nacional de Cancerología of Mexico from 2008 to 2011. All patients had an available biopsy sample and were classified into 4 different subtypes of adenocarcinoma (2015 World Health Organization classification). Lepidic-predominant adenocarcinoma was the only pattern that exhibited a marked gene expression difference compared with other predominant histologic patterns, revealing genes with significant expression (P < .01). Moreover, we identified 13 genes with specific differential expression in the lepidic-predominant adenocarcinoma that could be used as a gene signature. The lepidic-predominant histologic pattern has a differential gene expression profile compared with all predominant histologic patterns. Additionally, we identified a gene expression signature of 13 genes that have a unique behavior in the lepidic histologic pattern; these 13 genes are candidates for follow-up studies for their potential use as biomarkers or therapeutic targets. Results from this study highlight the importance of the new Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society classification and exemplify the potential clinical implications of correlating histopathology with exclusive molecular beacons. •Gene expression analysis in samples from the main histologic adenocarcinoma subtypes.•We identified 13 differentially expressed genes in the lepidic-predominant subtype.•The gene signature includes previous, as well as novel, tumor biomarkers.•Study highlights the importance of the new IASLC/ATS/ERS lung cancer classification.
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