HGT cells are a human gastric tumor cell line, Preliminary data have s
hown that HGT cells incorporate exogenous arachidonic acid (AA) in the
ir membrane lipids. However, we found that HCT cells are unable to pro
duce significant amounts of AA metabolites after stimulation with calc
ium ionophore A23187. Furthermore, no lipoxygenase activity was detect
ed in crude HCT cell extracts by employing an assay monitoring the in
vitro utilization of linoleic acid. The meaning of these results is di
scussed in respect of the role of eicosanoids during cell proliferatio
n.