Related Experiment Videos
12-lipoxygenase expression in human melanoma cell lines
11st Institute of Pathology and Experimental Cancer Research, Semmelweis University of Medicine, Budapest, Hungary.
Advances in Experimental Medicine and Biology
|February 10, 2000
Summary
Human melanoma cells express the platelet-type 12-lipoxygenase (12-LOX) at low levels. This expression remains stable from primary tumors to lung metastases, suggesting other lipoxygenases may also contribute to arachidonic acid metabolism.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- 12-lipoxygenase (12-LOX) is implicated in regulating the metastatic phenotype in murine melanoma models.
- Understanding 12-LOX expression in human melanoma is crucial for deciphering its role in metastasis.
Purpose of the Study:
- To investigate the expression of the platelet-type 12-LOX isoform in human melanoma cell lines.
- To compare 12-LOX expression in primary human melanoma tumors and their corresponding lung metastases.
Main Methods:
- Analysis of 12-LOX mRNA and protein levels in human melanoma cell lines (HT168, M1, HT199, HT18, WM35).
- Detection of 12-LOX expression in cultured tumor cells and skin tumor xenografts.
- Comparative analysis of 12-LOX expression in primary skin tumors versus lung metastases.
Main Results:
- Human melanoma cell lines express the platelet-type 12-LOX at low levels (up to 15% of cells) at both mRNA and protein levels.
- 12-LOX expression was confirmed in cultured cells and xenografts.
- Expression of 12-LOX was found to be stable between primary skin tumors and lung metastases.
Conclusions:
- The platelet-type 12-LOX is expressed in human melanoma, albeit at low levels.
- Stable 12-LOX expression suggests a consistent role in melanoma progression from primary to metastatic sites.
- The low expression indicates that other lipoxygenase enzymes may also contribute to arachidonic acid metabolism and 12-HETE production in human melanoma.