Abstract:
:The involvement of 12-lipoxygenase (12-LOX) expression and function in tumor metastasis has been demonstrated in several murine tumor cell lines. In addition, 12-LOX expression was detected in human prostatic tumors and correlated to the clinical stage of disease. Here we provide data that human prostate cancer cell lines express the platelet-type isoform of 12-LOX at both the mRNA and protein levels, and immunohistochemistry revealed 12-LOX expression in human prostate tumors. The enzyme was localized to the plasma membrane, cytoplasmic organelles and nucleus in non-metastatic cells (PC-3 nm) and to the cytoskeleton and nucleus in metastatic cells (DU-145). After orthotopic/intraprostatic injection of tumor cells into SCID mice, the metastatic prostate carcinoma cells (DU-145) expressed 12-LOX at a significantly higher level compared with the non-metastatic counterparts, PC-3nm. The functional involvement of 12-LOX in the metastatic process was demonstrated when DU-145 cells were pretreated in vitro with the 12-LOX inhibitors N-benzyl-N-hydroxy-5-phenylpentamide (BHPP) or baicalein, the use of which significantly inhibited lung colonization. These data suggest a potential involvement of 12-LOX in the progression of human prostate cancer.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Timár J,Rásó E,Döme B,Li L,Grignon D,Nie D,Honn KV,Hagmann Wdoi
10.1002/1097-0215(20000701)87:1<37::aid-ijc6>3.0.ckeywords:
subject
Has Abstractpub_date
2000-07-01 00:00:00pages
37-43issue
1eissn
0020-7136issn
1097-0215pii
10.1002/1097-0215(20000701)87:1<37::AID-IJC6>3.0.Cjournal_volume
87pub_type
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