Implantation-related expression of epidermal growth factor family molecules and their regulation by progesterone in the pregnant rat.
The uterine expressions of epidermal growth factor(EGF) family are examined to elucidate their exact role(s) in rat pregnancy. EGF and its receptors' (EGF-R) mRNA levels increased significantly at implantation after which their expression gradually decreased. Heparin-binding EGF (HB-EGF) and transforming growth factor-alpha (TGF-alpha) showed a modest expression at gestation day (GD), GD4 and GD3, respectively, but were much strongly expressed at mid-pregnancy.Amphiregulin (Areg) was strongly expressed around implantation (GD4) and at mid-pregnancy (GD12).Treatment of pregnant rats with RU486 at GD5 or GD8 blocked the expression of all the genes, and administration of immature rats with progesterone (P4) induced the uterine expression of all the genes except HB-EGF. In addition, HB-EGF,TGF-alpha, and Areg proteins in the uterine and glandular epitheliums may participate in mid-pregnancy. Taken together, all of these activities are likely to be controlled by P4 in the uterus of pregnant rats.
Byun
Hyuk-Soo
HS
Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea.
Lee
Geun-Shik
GS
Lee
Bo-Mi
BM
Hyun
Sang-Hwan
SH
Choi
Kyung-Chul
KC
Jeung
Eui-Bae
EB
D016475:3T3 Cells; D066258:Amphiregulin; D000818:Animals; D066255:EGF Family of Proteins; D010064:Embryo Implantation / Q000187:drug effects / Q000502:physiology*; D004815:Epidermal Growth Factor / Q000096:biosynthesis* / Q000235:genetics; D066246:ErbB Receptors / Q000378:metabolism; D005260:Female; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects / Q000502:physiology; D006023:Glycoproteins / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D008297:Male; D051379:Mice; D015735:Mifepristone / Q000494:pharmacology; D005810:Multigene Family / Q000502:physiology*; D011247:Pregnancy / Q000187:drug effects / Q000378:metabolism; D011270:Pregnancy, Animal / Q000187:drug effects / Q000378:metabolism*; D011374:Progesterone / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D017468:Receptors, Fibroblast Growth Factor / Q000378:metabolism; D016211:Transforming Growth Factor alpha / Q000378:metabolism
D066258:Amphiregulin; C587849:Areg protein, mouse; C587850:Areg protein, rat; D066255:EGF Family of Proteins; D006023:Glycoproteins; D036341:Intercellular Signaling Peptides and Proteins; D017468:Receptors, Fibroblast Growth Factor; D016211:Transforming Growth Factor alpha; D015735:Mifepristone; D011374:Progesterone; D004815:Epidermal Growth Factor; D066246:ErbB Receptors