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Expression of the multidrug-resistant gene in human musculoskeletal tumors
Y Nagata1, H Yamasaki, K Fukuda
1Department of Orthopaedic Surgery, Kinki University School of Medicine, Osaka, Japan.
Abstract:
We measured the levels of messenger RNA of the human multidrug-resistant (MDR) gene in 15 human musculoskeletal tumors. In metastatic tumors and those which did not respond to combination chemotherapy, there was an increased expression of this gene. No evidence of expressions of the MDR gene was found in the benign tumors. The high expression of the MDR gene from musculoskeletal tumors apparently induced a multidrug resistance, and this acquired resistance may be due to outgrowth of the P-glycoprotein-expressing MDR tumor. Elucidation of expression of the MDR gene is an important step in malignant musculoskeletal tumors research.
Insights
Increased expression of the human multidrug-resistant (MDR) gene was observed in aggressive musculoskeletal tumors. This finding suggests a link between MDR gene expression and chemotherapy resistance in these cancers.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Multidrug resistance (MDR) is a significant challenge in cancer chemotherapy.
- The human multidrug-resistant (MDR) gene plays a role in drug efflux from cells.
- Understanding MDR gene expression in musculoskeletal tumors is crucial for treatment strategies.
Purpose of the Study:
- To investigate the expression levels of the human multidrug-resistant (MDR) gene in various human musculoskeletal tumors.
- To determine if MDR gene expression correlates with tumor metastatic potential or response to chemotherapy.
Main Methods:
- Messenger RNA (mRNA) levels of the MDR gene were quantified in 15 human musculoskeletal tumor samples.
- Tumor samples were categorized based on metastatic status and response to combination chemotherapy.
Main Results:
- Elevated MDR gene expression was detected in metastatic musculoskeletal tumors.
- Increased MDR gene expression was also found in tumors that did not respond to combination chemotherapy.
- No MDR gene expression was observed in benign musculoskeletal tumors.
Conclusions:
- High expression of the MDR gene in musculoskeletal tumors is associated with multidrug resistance.
- Acquired multidrug resistance may result from the proliferation of P-glycoprotein-expressing MDR tumor cells.
- Elucidating MDR gene expression is vital for advancing research in malignant musculoskeletal tumors.