title: The influence of opioids on urokinase plasminogen activator on protein and mRNA level in MCF-7 breast cancer cell line.
abstract: Urokinase plasminogen activator plays a key role in tumor-associated processes, increasing cancer cell invasion and metastasis, and is therefore used as a marker in cancer prognosis. In this study, we have determined the effect of mu-opioid receptor agonists and antagonists on the urokinase plasminogen activator secretion in MCF-7 cell line. It was shown that mu-opioid receptor agonists, such as morphine and endomorphins, greatly stimulate urokinase plasminogen activator secretion, while naloxone and MOR-selective antagonists elicit the opposite effect. The same tendency was observed also on the urokinase plasminogen activator mRNA level. However, neither agonists nor antagonists had any effect on proliferation of MCF-7 cells. The findings reported in this study may be useful in designing further experiments aimed at elucidating the role of the opioid system in cancer cells.
authors.affiliation: Department of Biomolecular Chemistry, Medical University of Lodz, Lodz, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Gach
authors.forename: Janusz
authors.initials: J
authors.lastname: Szemraj
authors.forename: Jakub
authors.initials: J
authors.lastname: Fichna
authors.forename: Mariola
authors.initials: M
authors.lastname: Piestrzeniewicz
authors.forename: Dick S
authors.initials: DS
authors.lastname: Delbro
authors.forename: Anna
authors.initials: A
authors.lastname: Janecka
mesh_terms: D000701:Analgesics, Opioid / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000201:enzymology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D005260:Female; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D012333:RNA, Messenger / Q000378:metabolism; D017450:Receptors, Opioid, mu / Q000819:agonists / Q000037:antagonists & inhibitors / Q000378:metabolism; D055293:Receptors, Urokinase Plasminogen Activator / Q000235:genetics / Q000378:metabolism; D013997:Time Factors; D014568:Urokinase-Type Plasminogen Activator / Q000235:genetics / Q000378:metabolism*
chemical_list: D000701:Analgesics, Opioid; D009292:Narcotic Antagonists; D012333:RNA, Messenger; D017450:Receptors, Opioid, mu; D055293:Receptors, Urokinase Plasminogen Activator; D009270:Naloxone; D009020:Morphine; D014568:Urokinase-Type Plasminogen Activator