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BioScientifica, Reproduction, 2(140), p. 331-341, 2010

DOI: 10.1530/rep-10-0047

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Vascular endothelial growth factor-A isoform and (co)receptor expression are differentially regulated by 17β-oestradiol in the ovariectomised mouse uterus

Journal article published in 2010 by Lisa M. Walter, Peter A. W. Rogers ORCID, Jane E. Girling
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The angiogenic effects of 17β-oestradiol (E2) in the mouse endometrium are mediated by vascular endothelial growth factor-A (VEGFA). We analysed the temporal and spatial changes in VEGFA isoform and (co)receptor expression in ovariectomised mouse uteri following E2treatment. VEGFA isoform and receptor mRNA were quantified in whole uterine tissue collected 2, 6, 12 and 24 h after E2or vehicle treatment. Laser capture microdissection was used to investigate mRNA expression in epithelial, stromal and myometrial tissues separately. Endothelial cell proliferation, VEGFA and VEGF receptor-2 (VEGFR2) protein were visualised using immunohistochemistry. Endometrial endothelial cell proliferation was only observed 24 h after E2treatment. In whole uterine tissue, totalVegfa,Vegfa164andVegfa120mRNA expression increased 2 h post E2treatment, and then decreased by 24 h.Vegfa188expression was lower in E2-treated animals at all time points relative to control animals.Vegfr2and neuropilin-1 (Nrp1) mRNA expression did not change following E2treatment;Nrp2expression decreased by 24 h. When uterine compartments were considered separately at 24 h post E2or vehicle, stromalVegfa120,Vegfa188andVegfr2mRNA expression and myometrialVegfa120andVegfa188mRNA expression were reduced in E2-treated mice relative to controls, whereas epithelialVegfa188mRNA expression increased. The highest VEGFA immunoexpression was observed in luminal epithelium; expression increased at 24 h relative to other time points. No changes were noted in VEGFR2 immunoexpression among treatment groups. We have provided the first evidence that VEGFA isoform and receptor mRNA expression are differentially regulated by E2in different uterine cell compartments.