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LM7 cancer

An-Hoa Giang, Tamara Raymond, Paul Brookes, Karen de Mesy Bentley, Edward Schwarz, Regis O'Keefe, Roman Eliseev
Metabolic reprogramming in cancer is manifested by persistent aerobic glycolysis and suppression of mitochondrial function and is known as the Warburg effect. The Warburg effect contributes to cancer progression and is considered to be a promising therapeutic target. Understanding the mechanisms used by cancer cells to suppress their mitochondria may lead to development of new approaches to reverse metabolic reprogramming. We have evaluated mitochondrial function and morphology in poorly respiring LM7 and 143B osteosarcoma (OS) cell lines showing the Warburg effect in comparison with actively respiring Saos2 and HOS OS cells and noncancerous osteoblastic hFOB cells...
November 15, 2013: Journal of Biological Chemistry
Daniel Zuch, An-Hoa Giang, Yuriy Shapovalov, Edward Schwarz, Randy Rosier, Regis O'Keefe, Roman A Eliseev
Osteosarcoma is a devastating tumor of bone, primarily affecting adolescents. Osteosarcoma tumors are notoriously radioresistant. Radioresistant cancers, including osteosarcoma, typically exhibit a considerable potential for relapse and development of metastases following treatment. Relapse and metastatic potential can, in part, be due to a specific radioresistant subpopulation of cells with stem-like characteristics, cancer stem cells, which maintain the capacity to regenerate entire tumors. In the current study, we have investigated whether in vitro treatments with parthenolide, a naturally occurring small molecule that interferes with NF-κB signaling and has various other effects, will re-sensitize cancer stem cells and the entire cell population to radiotherapy in osteosarcoma...
April 2012: Journal of Cellular Biochemistry
Harm C A Graat, Victor W van Beusechem, Frederik H E Schagen, M Adhiambo Witlox, Eugenie S Kleinerman, Marco N Helder, Winald R Gerritsen, Gertjan J L Kaspers, Paul I J M Wuisman
Metastatic osteosarcoma (OS) has a very poor prognosis. New treatments are therefore wanted. The conditionally replicative adenovirus Ad5-Delta24RGD has shown promising anti-tumor effects on local cancers, including OS. The purpose of this study was to determine whether intravenous administration of Ad5-Delta24RGD could suppress growth of human OS lung metastases. Mice bearing SaOs-lm7 OS lung metastases were treated with Ad5-Delta24RGD at weeks 1, 2 and 3 or weeks 5, 6 and 7 after tumor cell injection. Virus treatment at weeks 1-3 did not cause a statistically significant effect on lung weight and total body weight...
2008: Molecular Cancer
Nicholas T Woods, Hirohito Yamaguchi, Francis Y Lee, Kapil N Bhalla, Hong-Gang Wang
Anoikis, a Bax-dependent apoptosis triggered by detachment from the extracellular matrix, is often dysfunctional in metastatic cancer cells. Using wild-type and c-Src-transformed NIH3T3 cells as a model, we identified Mcl-1 degradation and Bim up-regulation as a critical determinant of anoikis initiation. Detachment rapidly degraded Mcl-1 via a GSK-3beta-dependent proteasomal pathway and transcriptionally up-regulated Bim expression. Mcl-1 degradation in the presence of Bim was sufficient to induce anoikis...
November 15, 2007: Cancer Research
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