Related Experiment Videos
Microenvironment-induced cancer metastasis
1Department of Biophysics, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo. e.k.rofstad@labmed.uio.no
International Journal of Radiation Biology
|June 24, 2000
Summary
The tumor microenvironment, particularly low oxygen levels (hypoxia), can drive cancer metastasis. Reoxygenation and radiation therapy may also promote tumor spread by activating survival and metastatic pathways.
Area of Science:
- Oncology
- Cancer Biology
- Tumor Microenvironment
Background:
- The primary tumor microenvironment plays a critical role in cancer progression.
- Understanding factors within the tumor that promote metastasis is crucial for developing effective treatments.
Purpose of the Study:
- To evaluate clinical data on microenvironment-induced cancer metastasis.
- To explore mechanisms of metastasis driven by the primary tumor environment.
Main Methods:
- Critical review of existing data from experimental tumors.
- Analysis of studies involving cell cultures.
- Evaluation of clinical data from various cancer types.
Main Results:
- Low oxygen tension (hypoxia) in primary tumors correlates with metastasis in soft tissue sarcoma, cervix carcinoma, and head and neck cancers.
- Hypoxia can induce genetic instability and select for metastatic cell phenotypes.
- Reoxygenation and radiation therapy can enhance metastasis by activating survival and metastatic pathways.
Conclusions:
- Tumor hypoxia is a significant driver of metastasis through multiple mechanisms.
- Nutritional deprivation (low glucose, high lactate, low pH) can also promote metastasis.
- Radiation therapy may inadvertently promote metastasis in certain clinical scenarios.