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Comparative Genomic and Genetic Analysis of Paired Primary Breast - Metastatic Tumor Specimens Using High-throughput Platforms

This study is ongoing, but not recruiting participants.
Information provided by:
National University Hospital, Singapore Identifier:
First received: October 21, 2010
Last updated: January 21, 2014
Last verified: January 2014

Adequate quality and quantity of RNA may be extracted from paraffin-embedded tumor blocks for gene expression analysis. This has clinical relevance as gene expression signatures may then be profiled using archival tumor blocks, which are more readily available than frozen tissues.

Condition Intervention
Breast Cancer
Other: Breast Tumor Blocks

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective

Resource links provided by NLM:

Further study details as provided by National University Hospital, Singapore:

Study Start Date: August 2010
Estimated Study Completion Date: December 2014
Estimated Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Breast Tumor
Breast Tumor Blocks
Other: Breast Tumor Blocks


Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

Up to 10 archival breast tumor blocks will be obtained from the Department of Pathology, NUH - half of these blocks will be from patients who were diagnosed before year 2000, and the other half of the blocks will be from patients diagnosed between year 2000-2005 (control specimens). Basic tumor and patient information will be collected without patient identifiers - grade, stage, ER/PR/HER2 status, treatment received, outcome data. 8-10 ten-micron sections will be cut from each tumor block. RNA will be extracted from the tumor sections using the Roche High Pure FFPE RNA Micro Kit. RNA will be profiled using the Illumina Veracode assay and the Affymetrix Quantigene assay. RNA extraction and gene expression profiling will be performed by collabroators at the Genome Institute of Singapore.


Inclusion Criteria:

No participants are involved.

Exclusion Criteria:

No participants are involved.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01227733

National University Hospital
Singapore, Singapore
Sponsors and Collaborators
National University Hospital, Singapore