Expression of epidermal growth factor receptor (EGF-R), vascular endothelial growth factor receptor (VEGF-R) and fibroblast growth factor receptor (FGF-R) systems in porcine oviduct and endometrium during the time of implantation.
The oviduct and uterus provide the environment for the establishment of pregnancy. Among others, growth factor systems are involved in functional signaling interactions at the pre- and peri-implantation maternal-conceptus interface in pigs. Distinct regulation of epidermal growth factor Receptor (EGF-R), vascular endothelial growth factor receptor (VEGF-R) and fibroblast growth factor receptor (FGF-R) systems and of bioactivation of EGF-R in porcine oviduct and endometrium during the estrous cycle, early pregnancy and during steroid replacement in ovariectomized gilts is summarized. Remarkable influences of ovarian steroids and EGF on the expression of specific markers of transcription and translation in these tissues are discussed. Known biological effects of the EGF, VEGF and FGF are related to cellular differentiation and angiogenesis. This suggests their involvement in the transformation of the endometrium into a decidua subsequently leading towards successful establishment of pregnancy. Peripheral steroids may exert their effects on epithelial cells both in a direct genomic manner or through mediators such as growth factors. The aim of our study was to draw specific attention to the paracrine regulation in the porcine endometrium especially during the implantation window.
Wollenhaupt
Karin
K
Research Institute for the Biology of Farm Animals, Dummerstorf, Germany.
Welter
Harald
H
Einspanier
Ralf
R
Manabe
Noboru
N
Brüssow
Klaus-Peter
KP
D000818:Animals; D002454:Cell Differentiation; D004591:Electrophoresis, Polyacrylamide Gel; D010064:Embryo Implantation; D004717:Endometrium / Q000378:metabolism*; D066246:ErbB Receptors / Q000096:biosynthesis*; D030762:Estrous Cycle; D005260:Female; D007150:Immunohistochemistry; D007700:Kinetics; D009389:Neovascularization, Pathologic; D010053:Ovary / Q000378:metabolism; D011247:Pregnancy; D011270:Pregnancy, Animal; D012333:RNA, Messenger / Q000378:metabolism; D017468:Receptors, Fibroblast Growth Factor / Q000096:biosynthesis*; D040262:Receptors, Vascular Endothelial Growth Factor / Q000096:biosynthesis*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction; D013256:Steroids / Q000378:metabolism; D013552:Swine; D013997:Time Factors
D012333:RNA, Messenger; D017468:Receptors, Fibroblast Growth Factor; D013256:Steroids; D066246:ErbB Receptors; D040262:Receptors, Vascular Endothelial Growth Factor