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Pretreatment Mitochondrial Priming Correlates with Clinical Response to Cytotoxic Chemotherapy
Ist Teil von
Science (American Association for the Advancement of Science), 2011-11, Vol.334 (6059), p.1129-1133
Ort / Verlag
Washington, DC: American Association for the Advancement of Science
Erscheinungsjahr
2011
Quelle
Science Online_科学在线
Beschreibungen/Notizen
Cytotoxic chemotherapy targets elements common to all nucleated human cells, such as DNA and microtubules, yet it selectively kills tumor cells. Here we show that clinical response to these drugs correlates with, and may be partially governed by, the pretreatment proximity of tumor cell mitochondria to the apoptotic threshold, a property called mitochondrial priming. We used BH3 profiling to measure priming in tumor cells from patients with multiple myeloma, acute myelogenous and lymphoblastic leukemia, and ovarian cancer. This assay measures mitochondrial response to peptides derived from proapoptotic BH3 domains of proteins critical for death signaling to mitochondria. Patients with highly primed cancers exhibited superior clinical response to chemotherapy. In contrast, chemoresistant cancers and normal tissues were poorly primed. Manipulation of mitochondrial priming might enhance the efficacy of cytotoxic agents.