This process was undertaken under a national prospective clinical trial that would eventually be IRB-approved both within the NCI intramural program as well as through both CTEP-sponsored adult brain tumor consortia (NABTT and NABTC protocol # 01-07). With the activation of this study, we collected matched tumor, blood and plasma from the 14 contributing institutions (National Institutes of Health, Henry Ford Hospital, Thomas Jefferson University, University of California San Francisco, H. Lee Moffitt Hospital, University of Wisconsin, University of Pittsburgh Medical Center, University of California Los Angeles, M.D. Anderson Cancer Center, Dana Farber Cancer Center, Duke University, Johns Hopkins University, Massachusetts General Hospital and Memorial Sloan Kettering Cancer Center). All tissue collected is sent to the Neuro-Oncology Branch laboratory for processing. The samples were provided as snap frozen sections of areas immediately adjacent to the region used for the histopathological diagnosis. Initial histopathological diagnosis is performed at the tissue collecting institution following the World Health Organization (WHO) standards(6 (link)). The initial diagnosis is reviewed by in-house neuropathologists to assure a measure of consistency across samples. To date, 874 complete frozen sample sets have been accrued, of those 389 are Glioblastoma Multiforme, 122 are Astrocytomas, 113 are Oligodendrogliomas, 33 are Mixed with the reminder still unclassified.
Clinical data on the patients is collected prospectively until the patient’s death through the NABTC Operations Office at M.D. Anderson Cancer Center, Houston, Texas and the NABTT Operations office at the Johns Hopkins University, Baltimore, MD. The clinical data collected is updated into the Rembrandt database on a quarterly basis.
In order to assure consistency in the collection, shipment, processing, assaying, storage, data retrieval and dissemination, we have put together a series of standard operating procedures (SOPs) that have resulted in a streamlined, high-throughput operation capable of handling large numbers of samples in a consistent, operator-independent fashion. Consistency of data over time is continuously monitored by looking for any signs of batch effect in the analyses.