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Clinical waste may prove valuable for monitoring treatment response in ovarian cancer
Date:12/6/2013

A microchip-based device developed by Massachusetts General Hospital (MGH) investigators may greatly simplify the monitoring of patients' response to treatment for ovarian cancer the most lethal form of gynecologic cancer and certain other malignancies. The team from the MGH Cancer Center and the Center for Systems Biology reports using their device to isolate and identify tumor cells from ascites, an accumulation of fluid in the abdomen that often occurs in abdominal cancers. The PNAS Early Edition paper also describes development of a panel of four protein markers to accurately identify ovarian cancer cells in ascites.

"We were able to demonstrate that simply squirting small amounts of otherwise discarded ascites fluid into our device allowed us to quantify tumor cells and explore mechanistic markers of tumor progression without the need to process liters of ascites with advanced instrumentation not readily available in many community hospitals," says Cesar Castro, MD, MMSc, MGH Cancer Center and Center for Systems Biology, co-lead author of the PNAS paper. "Moreover, achieving point-of-care readouts of tumor cell markers from repeatedly collected ascites at different time points, could allow for frequent monitoring of treatment response without having to wait for the next imaging scan."

The ability to reliably track treatment response essentially lets caregivers know whether a particular anticancer drug should be continued or if another option should be tried. Tumor recurrence begins before metastases become visible on imaging studies, so several options for non-invasive "liquid biopsies" are being investigated, including analysis of circulating tumor cells and other factors found in the blood. Since ovarian cancer metastases are usually confined to the abdominal cavity and ascites commonly form in advanced disease, the research team theorized that ascites fluid could be an alternative, if not better, option than
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Contact: Cassandra Aviles
cmaviles@partners.org
617-724-6433
Massachusetts General Hospital
Source:Eurekalert  

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