Tags

Type your tag names separated by a space and hit enter

Regulation of expression of fibroblast growth factor 7 in the pig uterus by progesterone and estradiol.
Biol Reprod. 2007 Jul; 77(1):172-80.BR

Abstract

Fibroblast growth factor 7 (FGF7) stimulates cell proliferation, differentiation, migration and angiogenesis. The consensus is that FGF7, expressed by mesenchymal cells, binds FGF receptor 2IIIb (FGFR2) on epithelia, thereby mediating epithelial-mesenchymal interactions. The pig uterus is unique in that FGF7 is expressed by the luminal epithelium (LE) and FGFR2 is expressed by the LE, glandular epithelium (GE), and trophectoderm to effect proliferation and differentiated cell functions during conceptus development and implantation. FGF7 expression by the uterine LE of pigs increases between Days 9 and 12 of the estrus cycle and pregnancy, as circulating concentrations of progesterone increase, progesterone receptors (PGR) in the uterine epithelia decrease, and the conceptuses secrete estradiol-17beta (E(2)), for pregnancy recognition. Furthermore, E(2) increases the expression of FGF7 in pig uterine explants. The present study investigates the relationships between progesterone, E(2), and their receptors and the expression of FGF7 in the pig uterus in vivo. Pigs were ovariectomized on Day 4 of the estrus cycle and injected i.m. daily from Day 4 to Day 12 with either corn oil (CO), progesterone (P4), P4 and ZK317,316 (PZK), E(2), P4 and E(2) (PE), or P4 and ZK and E(2) (PZKE). All gilts (n = 5/treatment) were hysterectomized on Day 12. The results suggest that: 1) P4 is permissive to FGF7 expression by down-regulating PGR in LE; 2) P4 stimulates PGR-positive uterine stromal cells to release an unidentified progestamedin that induces FGF7 expression by LE; 3) E(2) and P4 can induce FGF7 when PGR are rendered nonfunctional by ZK; and 4) E(2) from conceptuses interacts via estrogen receptor alpha, but not estrogen receptor beta in LE to induce maximal expression of FGF7 in LE on Day 12 of pregnancy in pigs.

Authors+Show Affiliations

Center for Animal Biotechnology and Genomics, Texas A&M University, College Station, Texas 77843, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

17392499

Citation

Ka, Hakhyun, et al. "Regulation of Expression of Fibroblast Growth Factor 7 in the Pig Uterus By Progesterone and Estradiol." Biology of Reproduction, vol. 77, no. 1, 2007, pp. 172-80.
Ka H, Al-Ramadan S, Erikson DW, et al. Regulation of expression of fibroblast growth factor 7 in the pig uterus by progesterone and estradiol. Biol Reprod. 2007;77(1):172-80.
Ka, H., Al-Ramadan, S., Erikson, D. W., Johnson, G. A., Burghardt, R. C., Spencer, T. E., Jaeger, L. A., & Bazer, F. W. (2007). Regulation of expression of fibroblast growth factor 7 in the pig uterus by progesterone and estradiol. Biology of Reproduction, 77(1), 172-80.
Ka H, et al. Regulation of Expression of Fibroblast Growth Factor 7 in the Pig Uterus By Progesterone and Estradiol. Biol Reprod. 2007;77(1):172-80. PubMed PMID: 17392499.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Regulation of expression of fibroblast growth factor 7 in the pig uterus by progesterone and estradiol. AU - Ka,Hakhyun, AU - Al-Ramadan,Saeed, AU - Erikson,David W, AU - Johnson,Greg A, AU - Burghardt,Robert C, AU - Spencer,Thomas E, AU - Jaeger,Laurie A, AU - Bazer,Fuller W, Y1 - 2007/03/28/ PY - 2007/3/30/pubmed PY - 2007/9/26/medline PY - 2007/3/30/entrez SP - 172 EP - 80 JF - Biology of reproduction JO - Biol. Reprod. VL - 77 IS - 1 N2 - Fibroblast growth factor 7 (FGF7) stimulates cell proliferation, differentiation, migration and angiogenesis. The consensus is that FGF7, expressed by mesenchymal cells, binds FGF receptor 2IIIb (FGFR2) on epithelia, thereby mediating epithelial-mesenchymal interactions. The pig uterus is unique in that FGF7 is expressed by the luminal epithelium (LE) and FGFR2 is expressed by the LE, glandular epithelium (GE), and trophectoderm to effect proliferation and differentiated cell functions during conceptus development and implantation. FGF7 expression by the uterine LE of pigs increases between Days 9 and 12 of the estrus cycle and pregnancy, as circulating concentrations of progesterone increase, progesterone receptors (PGR) in the uterine epithelia decrease, and the conceptuses secrete estradiol-17beta (E(2)), for pregnancy recognition. Furthermore, E(2) increases the expression of FGF7 in pig uterine explants. The present study investigates the relationships between progesterone, E(2), and their receptors and the expression of FGF7 in the pig uterus in vivo. Pigs were ovariectomized on Day 4 of the estrus cycle and injected i.m. daily from Day 4 to Day 12 with either corn oil (CO), progesterone (P4), P4 and ZK317,316 (PZK), E(2), P4 and E(2) (PE), or P4 and ZK and E(2) (PZKE). All gilts (n = 5/treatment) were hysterectomized on Day 12. The results suggest that: 1) P4 is permissive to FGF7 expression by down-regulating PGR in LE; 2) P4 stimulates PGR-positive uterine stromal cells to release an unidentified progestamedin that induces FGF7 expression by LE; 3) E(2) and P4 can induce FGF7 when PGR are rendered nonfunctional by ZK; and 4) E(2) from conceptuses interacts via estrogen receptor alpha, but not estrogen receptor beta in LE to induce maximal expression of FGF7 in LE on Day 12 of pregnancy in pigs. SN - 0006-3363 UR - https://www.unboundmedicine.com/medline/citation/17392499/Regulation_of_expression_of_fibroblast_growth_factor_7_in_the_pig_uterus_by_progesterone_and_estradiol_ L2 - https://academic.oup.com/biolreprod/article-lookup/doi/10.1095/biolreprod.106.056309 DB - PRIME DP - Unbound Medicine ER -