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Clues to cancer pathogenesis found in cell-conditioned media
Date:2/9/2014

Philadelphia, PA, February 10, 2014 Primary effusion lymphoma (PEL) is a rare B-cell neoplasm distinguished by its tendency to spread along the thin serous membranes that line body cavities without infiltrating or destroying nearby tissue. By growing PEL cells in culture and analyzing the secretome (proteins secreted into cell-conditioned media), investigators have identified proteins that may explain PEL pathogenesis, its peculiar cell adhesion, and migration patterns. They also recognized related oncogenic pathways, thereby providing rationales for more individualized treatment. The results are published in The American Journal of Pathology.

A biomarker is a biological molecule found in blood, other body fluids, or tissues that is a sign of a normal or abnormal process, a condition, or disease, and can help develop personalized therapeutic approaches for patients. Analysis of secretomes is a new strategy for discovering biomarkers involved in cancer pathogenesis based on the reasoning that these fluids will be enriched in proteins secreted by cancer cells, shed from cancer cell surfaces, or released from the interior of cells (through vesiculation, cell lysis, apoptosis, or necrosis). The content of the secretome may reflect the functional state of the cells at a specific time point.

In this study, investigators from the Istituto Nazionale dei Tumori of Milan and the Centro di Riferimento Oncologico of Aviano, Italy, analyzed secretomes from four established PEL cell lines (CRO-AP2, CRO-AP3, CRO-AP5, and CRO-AP6; established in the laboratories directed by Antonino Carbone, MD) as well as from four PEL clinical samples and three primary solid lymphomas. PEL tumor cells are characterized by Kaposi's sarcoma-associated herpesvirus (KSHV) infection, and the primary solid lymphomas were also KSHV-positive.

Protein content was measured using two complementary mass spectrometry platforms. The experiments allowed cells to grow f
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Contact: Eileen Leahy
ajpmedia@elsevier.com
732-238-3628
Elsevier Health Sciences
Source:Eurekalert

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