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. 2011 Mar;178(3):1245–1256. doi: 10.1016/j.ajpath.2010.11.070

Figure 4.

Figure 4

Progesterone withdrawal results in elevated IL-8 mRNA expression but only under hypoxic conditions. A: Significant up-regulation of IL-8 mRNA expression was observed in proliferative endometrium (n = 5, five different women) subjected to in vitro progesterone withdrawal (Pw/d) in the presence of hypoxia (*P < 0.05). This effect was abrogated by the addition of 8.4 μmol/L of indomethacin (Indo), a COX inhibitor. B: Insertion of the LNG-IUS, with consequent local progesterone deprivation analogous to local progesterone withdrawal, resulted in a significant increase in IL-8 mRNA (P < 0.05). Note logarithmic scale on the y axis. Immunohistochemical staining of IL-8 in mid secretory phase endometrium before IUS insertion (C) and in endometrium from the same woman four months after IUS insertion (D). GE, glandular epithelial cells; St, stromal compartment; dSt, decidualized stromal cells. Arrows indicate perivascular cells.