15-Hydroxyprostaglandin dehydrogenase and cyclooxygenase 2 messenger ribonucleic acid expression and immunohistochemical localization in human cervical tissue during term and preterm labor

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Abstract

Here we have examined the enzymes cyclooxygenase (COX)-2 and 15-hydroxyprostaglandia dehydrogenase (15-OH PGDH) in pregnant human cervix. In biopsies taken transvaginally after preterm and term elective cesarean sections and vaginal deliveries, the levels of mRNA coding for COX-2 and 15-OH PGDH were assessed by Northern blotting. The cellular localization of the COX-2 and 15-OH PGDH proteins was determined by immunohistochemical analysis. COX-2 and 15-OH PGDH mRNAs were expressed at detectable levels in the cervical biopsies from all four groups of subjects. At cesarean sections (unripe cervix), the level of 15-OH PGDH mRNA was significantly higher than the level in the ripe cervix at the time of partus, irrespective of the gestational length. In contrast, the level of COX-2 mRNA was similar in all subjects. Immunoreactivity of COX-2 and 15-OH PGDH was expressed by activated fibroblasts. The present investigation documents the expression and cellular localization of COX-2 and 15-OH PGDH in the preterm and term pregnant human cervix. This observation indicates that both preterm and term cervical ripening is associated with decreased degradation of prostaglandins.

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Törnblom, S. A., Patel, F. A., Byström, B., Giannoulias, D., Malmström, A., Sennström, M., … Ekman, G. (2004). 15-Hydroxyprostaglandin dehydrogenase and cyclooxygenase 2 messenger ribonucleic acid expression and immunohistochemical localization in human cervical tissue during term and preterm labor. In Journal of Clinical Endocrinology and Metabolism (Vol. 89, pp. 2909–2915). https://doi.org/10.1210/jc.2003-031149

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