Oxygen Transport to Tissue XXV pp 245-250 | Cite as
Lack of Association Between Tumor Oxygenation and Cell Cycle Distribution or Proliferation Kinetics in Experimental Sarcomas
Abstract
In tumor cells, pronounced hypoxia induces an arrest of cell cycle in the late G1phase1−3. Since hypoxia is a common phenomenon in experimental and human tumors the hypoxia-induced disturbance of the cell cycle may play a role in the reduced efficacy of non-surgical treatment modalities resulting in a reduced long-term prognosis and a higher rate of local recurrences in hypoxic tumors4,5. It has been shown that a cell cycle arrest reduces the efficacy of standard radiotherapy6,7 and may alter the cytotoxic effects of various chemotherapeutic agents such as cisplatin, alkylating agents, doxorubicin or taxols8−12 and of cytokines13. If tumor hypoxia plays a relevant role in affecting the cell cycle under in vivo conditions, then modulation of the oxygenations status (e.g., by breathing hyperoxic gases) may increase the efficacy of these treatments.
Keywords
Oxygenation Status Cell Cycle Distribution BrdU Incorporation Tumor Hypoxia Tumor OxygenationPreview
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