Epithelial cells captured from ductal carcinoma in situ reveal a gene expression signature associated with progression to invasive breast cancer
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Citações na Scopus
6
Tipo de produção
article
Data de publicação
2016
Título da Revista
ISSN da Revista
Título do Volume
Editora
IMPACT JOURNALS LLC
Autores
ELIAS, Eliana Vanina
CASTRO, Nadia Pereira de
PINEDA, Paulo Henrique Baldan
ABUAZAR, Carolina Sens
OSORIO, Cynthia Aparecida Bueno de Toledo
PINILLA, Mabel Gigliola
SILVA, Sabrina Daniela da
CAMARGO, Anamaria Aranha
SILVA JR., Wilson Araujo
FERREIRA, Elisa Napolitano e
Citação
ONCOTARGET, v.7, n.46, p.75672-75684, 2016
Resumo
Breast cancer biomarkers that can precisely predict the risk of progression of non-invasive ductal carcinoma in situ (DCIS) lesions to invasive disease are lacking. The identification of molecular alterations that occur during the invasion process is crucial for the discovery of drivers of transition to invasive disease and, consequently, biomarkers with clinical utility. In this study, we explored differences in gene expression in mammary epithelial cells before and after the morphological manifestation of invasion, i.e., early and late stages, respectively. In the early stage, epithelial cells were captured from both pre-invasive lesions with distinct malignant potential [pure DCIS as well as the in situ component that co-exists with invasive breast carcinoma lesions (DCIS-IBC)]; in the late stage, epithelial cells were captured from the two distinct morphological components of the same sample (in situ and invasive components). Candidate genes were identified using cDNA microarray and rapid subtractive hybridization (RaSH) cDNA libraries and validated by RT-qPCR assay using new samples from each group. These analyses revealed 26 genes, including 20 from the early and 6 from the late stage. The expression profile based on the 20 genes, marked by a preferential decrease in expression level towards invasive phenotype, discriminated the majority of DCIS samples. Thus, this study revealed a gene expression signature with the potential to predict DCIS progression and, consequently, provides opportunities to tailor treatments for DCIS patients.
Palavras-chave
breast cancer, ductal carcinoma in situ progression, gene signature, cellular-based analysis, molecular markers
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