Abstract:
:In vivo studies have shown that inhibitors of cyclooxygenase metabolism of arachidonic acid may diminish growth and metastasis of certain tumors. Because cyclooxygenase inhibition may increase the production of lipoxygenase products of arachidonic acid metabolism, we have investigated the effect of two such products, 12-hydroxyeicosatetraenoic acid (12-HETE) and 15-hydroxyeicosatetraenoic acid (15-HETE) on tumor cell proliferation in vitro. When neuroblastoma cells (SK-N-SH) in culture were treated with 12-HETE for 18 hr, incorporation of [3H]thymidine was inhibited up to 64% at concentrations from 20 to 50 microM. Under the same conditions, 15-HETE resulted in inhibition of up to 46%, while arachidonic acid had no apparent effect. When evaluated in the presence of serum, 12-HETE at a concentration of 120 microM produced a 20.6 +/- 2.8% (S.E.) inhibition of the increase in total DNA content over 48 hr, while 15-HETE at this concentration produced a 16.5 +/- 5.3% inhibition. We conclude that 12-HETE, the product of platelet lipoxygenase, and 15-HETE, a product of neutrophil and lymphocyte lipoxygenases, can inhibit human neuroblastoma cell growth in vitro and may play a role in the effect of cyclooxygenase inhibitors on tumor growth in vivo.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Werner EJ,Walenga RW,Dubowy RL,Boone S,Stuart MJsubject
Has Abstractpub_date
1985-02-01 00:00:00pages
561-3issue
2eissn
0008-5472issn
1538-7445journal_volume
45pub_type
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