Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from breast cancer FNA and surgical specimens from patients


ABSTRACT: The behavior of breast cancers and their response to neoadjuvant systemic therapy depend on their phenotype which is to a large extent determined by gene expression programs within the cancer cell. The purpose of the analysis was to compare matched gene expression profiles of pretreatment cancer with post-neoadjuvant systemic therapy, residual cancer. Pre-treatment FNA from primary tumors or post-treatment surgical specimens were obtained and RNA extracted and hybridized to afymetrix microarrays according to manufacturer protocol.

ORGANISM(S): Homo sapiens

SUBMITTER: TAKAYUKI IWAMOTO 

PROVIDER: E-GEOD-32072 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Gene expression, molecular class changes, and pathway analysis after neoadjuvant systemic therapy for breast cancer.

Gonzalez-Angulo Ana M AM   Iwamoto Takayuki T   Liu Shuying S   Chen Huiqin H   Do Kim-Anh KA   Hortobagyi Gabriel N GN   Mills Gordon B GB   Meric-Bernstam Funda F   Symmans W Fraser WF   Pusztai Lajos L  

Clinical cancer research : an official journal of the American Association for Cancer Research 20120110 4


<h4>Purpose</h4>To examine gene expression differences between pre- and post-neoadjuvant systemic therapy (NST) specimens of breast cancers and identify biologic changers that may lead to new therapeutic insights.<h4>Methods</h4>Gene expression data from prechemotherapy fine needle aspiration specimens were compared with resected residual cancers in 21 patients after 4 to 6 months of NST. We removed stroma-associated genes to minimize confounding effects. PAM50 was used to assign molecular class  ...[more]

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