Methyl‐p‐Hydroxyphenyllactate‐esterase activity and type‐II estrogen‐binding sites in ovarian cancer: Correlation with biological and clinico‐pathological parameters

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Abstract
We examined the levels of activity of methyl-p-hydroxyphenyl-lactate esterase (MeHPLA-ase) and cytosolic Type-II-estrogen-binding sites (Type-II EBS) in 61 and 71 cases, respectively, of primary ovarian cancer. MeHPLA-ase activity and Type-II EBS were seen to by asymmetrically distributed, in that levels were skewed towards the lower values. A statistically significant direct correlation was found between MeHPLA-ase activity and Type-II EBS. MeHPLA-ase activity and Type-II EBS were inversely correlated with ER and PR levels and showed a trend towards inverse correlation with the percentage of cells in S-phase of the cell cycle. MeHPLA-ase activity and Type-II EBS did not correlate with clinico-pathological parameters. The median MeHPLA-ase activity tended to be higher in responders than in unresponsive patients, but statistical significance was not reached. Higher Type-II-EBS levels were found in cases showing complete and partial response to chemotherapy than in cases which did not respond. A statistically significant relationship was found between high MeHPLA-ase activity and longer overall survival.

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