Journal
RESEARCH IN VETERINARY SCIENCE
Volume 92, Issue 3, Pages 471-477Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.rvsc.2011.02.016
Keywords
Granulosa cell turnout; Horse; Angiogenesis; Ovarian tumour; VEGF; Angiopoietin
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The first part of our study (Muller et al., 2009) characterized angiogenesis in the equine cycling ovary through histomorphological and immunohistochemical examinations (vascular endothelial growth factors A and B [VEGF A, VEGF B], vascular endothelial growth factor receptors 1 and 2 [VEGF-R1, VEGF-R2], vascular angiopoietins 1 and 2 [Ang1, Ang2], angiopoietin receptor [Tie2], and von Willebrand Factor). Since angiogenesis plays an important role in development and growth of numerous tumours, the second part of our study involved a similar examination of 70 equine granulosa cell tumours (GCTt). The results of the second study were compared with those of the normal equine ovary. Certain similarities in the expression pattern could be detected between normal, cyclical ovaries (Muller et al., 2009) and GCTt. The immunoreactivity of granulosa cells and Leydig-like cells in GCTt resembles granulosa cells and luteinized thecal cells in periovulatory cycling ovaries. The neoplastic cells support circulation, supply and growth of GCTt by contributing to angiogenesis. (C) 2011 Elsevier Ltd. All rights reserved.
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